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Miyamori Yasunori

Faculty of Engineering　Civil Engineering　Advanced Social SystemProfessor

Researcher basic information

■ Degree
  • Doctor of Engineering, Hokkaido University, Mar. 2003
  • Master of Engineering, Hokkaido University, Mar. 2000
  • Bachelor of Engineering, Hokkaido University, Mar. 1998
■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • 構造工学・地震工学
  • センシング社会基盤
  • 都市・社会防災
  • インターネット高度化
  • 減災
  • 維持管理工学
  • 振動測定技術
  • スマートセンサー
  • データレポジトリシステム
  • センサーネットワーク
  • 構造健全度診断
  • 耐震
  • ヘルスモニタリング
  • 構造ヘルスモニタリング
  • シミュレーション工学
  • 地震工学
  • 橋梁工学
  • Inteligent structures
  • Bridge Engineering
  • Seismic Engineering
Research Field
  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Safety engineering
  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Social systems engineering
  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Structure engineering and earthquake engineering
■ Educational Organization

Career

■ Career
Career
  • Oct. 2022 - Present
    Hokkaido University, Faculty of Engineering, Professor, Japan
  • Apr. 2022 - Sep. 2022
    Kitami Institute of Technology, Division of Civil and Environmental Engineering, Professor, Japan
  • Apr. 2015 - Mar. 2022
    Kitami Institute of Technology, Faculty of Engineering, 准教授, Japan
  • Apr. 2008 - Mar. 2014
    Kitami Institute of Technology, Faculty of Engineering Department of Civil and Environmental Engineering, Associate Professor
  • Apr. 2007 - Mar. 2008
    Department of Civil Engineering, Kitami Institute of Technology, Hokkaido, Japan, Associate Professor
  • Apr. 2004 - Mar. 2007
    Department of Civil Engineering, Kitami Institute of Technology, Hokkaido, Japan, Assistant Professor
  • Apr. 2005 - Feb. 2006
    University of Illinois at Urbana-Champaign, Visiting Scholar, United States
  • Apr. 2003 - Mar. 2004
    Department of Civil and Structural Engineering, Kyushu University, Fukuoka, Japan, Research Associate
Educational Background
  • Apr. 2000 - Mar. 2003, Hokkaido University, Graduate School of Engineering, Doctoral Course, Division of Structural and Geotechnical Engineering, Japan
  • Apr. 1998 - Mar. 2000, Hokkaido University, Graduate School of Engineering, Master's Course, Division of Structural and Geotechnical Engineering, Japan
  • Apr. 1994 - Mar. 1998, Hokkaido University, School of Engineering, Department of Civil Engineering, Japan

Research activity information

■ Papers
  • Changes in the Bridge Health Index and integrity of structural members based on periodic inspection records in bridges managed by a municipal government
    Onoda Hitomi; Miyamori Yasunori; Saito Takehiko; Kadota Takanori; Mikami Shuichi
    Journal of Structural Engineering, A, 71A, 167, 179, Japan Society of Civil Engineers, Mar. 2025, [Peer-reviewed], [Corresponding author]
    Japanese, Scientific journal, Infrastructure management and its extending service life in the area are crucial for the local government to realize the region's sustainability. As part of appropriate maintenance and management, a periodic close-up visual inspection of bridges has been mandatory since 2014 in Japan, and the inspection results have been accumulated. In this study, we proposed a simple conversion method for two inspections with different evaluation methods for the Bridge Health Index, examined its validity, and compared the value of the entire bridge with the evaluation results for each member. From these results, the key point for effectively using bridge inspection records is comparing the evaluation results for each member and each inspection item of damage.
  • Construction of a point cloud FE model of the structure and its validity by static load tests
    Yoshida Meiyo; Miyamori Yasunori; Kadota Takanori; Saito Takehiko
    Journal of Structural Engineering, A, 70A, 414, 427, Japan Society of Civil Engineers, Mar. 2024, [Peer-reviewed], [Corresponding author]
    Japanese, Scientific journal, In this study, an FE model of a structure was constructed by the extending algorithm for constructing point cloud FE models that the authors have studied. The point cloud FE model was built from dense point cloud data by box-grid downsampling of the point cloud, segmentation of structural parts, finding contour in each section, 2D Delaunay triangulation in the section, making solid elements by connecting triangles, reconnecting structural parts and exporting to a formatted file. Static loading tests for a removed railway bridge and a linear static analysis of the FE model were conducted to verify the method. The point cloud FE model provided quantitative structural stresses, and the experimental and analytical results generally agreed with each other at the location of maximum stresses., 40285956
  • Long-term investigations of dynamic behavior of a pre-stressed concrete ballasted railway bridge
    Youqi Zhang; Yasunori Miyamori; Takanori Kadota; Takehiko Saito
    Structures, 53, 822, 832, Elsevier BV, Jul. 2023, [Peer-reviewed]
    English, Scientific journal, 40285959;40285961
  • A consideration of the jack-up bearing stiffener design method based on the jack-up reaction force
    Takanori Kadota; Yasunori Miyamori; Takehiko Saito
    Journal of Structural Engineering, A, 69A, 386, 394, Mar. 2023, [Peer-reviewed]
    Japanese, Scientific journal
  • Outlier Detection for Structural Health Monitoring Data Using Image Similarity
    Youqi Zhang; Yasunori Miyamori; Takeshi Miyashitac; Akihiro Tomioka; Takuya Daigo
    Elsevier BV, 2023
  • Inclination monitoring of a bridge pier in the winter season with high-sensitivity
    Yasunori Miyamori; Yoichi Hinata; Yoshihito Imaizumi; Tomohisa Takehara; Shuichi Mikami; Toshiyuki Oshima
    Proceedings of the 11th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII-11, SHMII-11_T11-03, Aug. 2022, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, International conference proceedings, 40290996
  • THE PSEUDO-DYNAMIC SIMULATION OF A SEISMIC ISOLATION BRIDGE ABOUT THE TEMPERATURE DEPENDENCE OF HIGH DAMPING RUBBER BEARINGS
    SAITO Takehiko; MIYAMORI Yasunori; NAKAMURA Yasuyuki; TAKENOUCHI Kosuke; YAMAZAKI Nobuhiro
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 78, 4, I_468, I_477, Japan Society of Civil Engineers, 2022, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, In this study, in order to reflect the change of the hysteresis characteristic of the high damping rubber bearings to the seismic response, a pseudo-dynamic simulation system using experimental equipment capable of loading test at low temperature was developed. The pseudo-dynamic simulation system was developed by using open source UI-SIMCOR. To enhance the usability of the system, sub-program for static response analysis was also developed for the application of a versatile FEM software. As the results, it was possible to incorporate into the response analysis that the hysteresis loop of the bearing changed as the vibration progressed. And the nonlinear hysteresis characteristic of the pier bottom can be expressed.
  • Deep Learning for Information Triage on Twitter
    Michal Ptaszynski; Fumito Masui; Yuuto Fukushima; Yuuto Oikawa; Hiroshi Hayakawa; Yasunori Miyamori; Kiyoshi Takahashi; Shunzo Kawajiri
    Applied Sciences, 11, 14, 6340, 6340, {MDPI} {AG}, Jul. 2021, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • A development of a hybrid remote safety monitoring system for scoured bridge substructures
    Yasunori Miyamori; Yoichi Hinata; Yoshihito Imaizumi; Tomohisa Takehara; Shuichi Mikami; Toshiyuki Oshima
    International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII, 2021-June, 1419, 1424, Jun. 2021, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, International conference proceedings, 40290996;40291154
  • Structural health monitoring of the concrete barrier of a plate girder bridge by long term vibration monitoring with high-sensitivity MEMS accelerometers
    Yasunori Miyamori; Takeshi Miyashita; Takuya Daigo; Akihiro Tomioka; Yuki Shibata; Masaji Yoshinaka; Takehiko Saito
    International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII, 2021-June, 1737, 1741, Jun. 2021, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, International conference proceedings
  • Large-scale open-channel experiments on the collapse of abutment backfill owing to floods and proposed countermeasure
    Shunzo Kawajiri; Kohei Onmayashiki; Yasuharu Watanabe; Tomoya Matsuda; Masaki Koyama; Yasunori Miyamori; Takayuki Kawaguchi
    Journal of Japan Society of Civil Engineers, 9, 1, 125, 137, 2021, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Fundamental study on the structural health monitoring method to the pedestrian overpass with corrosion damage
    Kadota Takanori; Miyamori Yasunori; Saito Takehiko; Shirakawa Yuta; Obata Takashi
    Journal of Structural Engineering, A, 67A, 261, 272, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, Many pedestrian overpasses had been constructed based on the standard design and most of such bridges have been in service for over 50 years. These bridges often have corrosion damages at invisible members. Therefore, an efficient damage detection method as the structural health monitoring needs to be developed. In this study, a detailed finite element model was constructed to reproduce the bridge analytically and its vibration characteristics were compared to the measurement results. Furthermore, we investigated the effect of corrosion damage on the modal amplitude of the deck by using a finite element model. As a result of this investigation, it is basically possible to identify the damage location of the deck which by focused modal amplitude ratios of damaged conditions.
  • THE TECHNOLOGICAL TRENDS AND FUTURE CHALLENGES OF POINT CLOUD PROCESSING TECHNOLOGY FOR THE MAINTENANCE OF CIVIL STRUCTURES
    KADOTA Takanori; MIYAMORI Yasunori
    Intelligence, Informatics and Infrastructure, 2, J2, 333, 340, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Last author], [Domestic magazines]
    Japanese, Scientific journal, There are numerous in-service structures in modern society, and establishing an efficient management scheme is an urgent issue for the sustainability of our life. The recent digital transformation technologies such as SfM and laser scanning are promising for obtaining detailed as-built information of structures. We investigated the 3D digital modeling techniques for the maintenance of infrastructures especially point cloud data. A literature review of practically used systems for infrastructural resilience management in Japan is conducted. Then, we discussed current challenges and prospects for introducing a 3D model in the maintenance engineering of structures. From the above studies, both laser scanning and structure from motion (SfM) techniques are commonly used to construct point cloud data. UAV and other mobile robot systems enhance the applicability for large-scale infrastructures. On the other hand, the cost of the system and handling large amounts of data are challenging issues, and transformation from the 3D model to structural analysis is also another issue to utilize such information in maintenance engineering.
  • Investigation of temperature effects on dynamic characteristics of a steel girder bridge by long-term monitoring
    Yoshinaka Masaji; Miyamori Yasunori; Shibata Yuki; Daigo Takuya; Tomioka Akihiro; Miyashita Takeshi; Saito Takehiko
    Journal of Structural Engineering, A, 67A, 183, 194, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, The long-term vibration monitoring of a steel girder bridge in the cold region was performed to investigate the temperature dependency on the dynamic characteristics of the bridge structure. The predominant frequency varied depending on the daily and seasonal fluctuation of the bridge temperature. A FE model with different elastic modulus based on each assumed temperature gave the natural vibration frequencies analytically. These natural frequencies have the same tendency with the measured result that means the main cause of the variation of the predominant frequency is the thermal dependencies of the elastic modulus of the structural members.
  • RESEARCH TRENDS IN MACHINE LEARNING FROM THE PERSPECTIVE OF DISASTER PREVENTION APPLICATIONS
    MIYAMOTO Takashi; ASAKAWA Tadasu; KUBO Hisahiko; NOMURA Yasutoshi; MIYAMORI Yasunori
    Intelligence, Informatics and Infrastructure, 1, J1, 242, 251, Japan Society of Civil Engineers, 11 Nov. 2020, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, In recent years, machine learning methods such as deep learning have evolved greatly in terms of performance, and they have been used for various purposes in disaster prevention. On the other hand, the intrinsic shortage of the number of data, the improvement of explanatory and interpretive nature of the task processing process are important issues that need to be addressed by computational models for decision making in disaster management. In this paper, we will discuss the concept, methods, and applications for addressing these two points based on research trends in the field of machine learning, and also introduce approaches that integrate mathematical and data-driven models to address these two issues.
  • EXPERIMENTS ABOUT THE TEMPERATURE DEPENDENCY OF HIGH DAMPING RUBBER BEARINGS DUE TO THE DIFFERENCES OF SHEAR STRAIN AND VERTICAL COMPRESSIVE STRESS
    SAITO Takehiko; NAKAMURA Yasuyuki; TAKENOUCHI Kosuke; YAMAZAKI Nobuhiro; MIYAMORI Yasunori; YAMAZAKI Tomoyuki
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 76, 4, I_507, I_515, Japan Society of Civil Engineers, 2020, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, According to past researches, the mechanical characteristics of rubber bearings which used as seismic isolation devices in bridges depend on temperature. To use the devices in cold region, it is important to evaluate about the temperature dependency of the mechanical characteristics of rubber bearings. Therefore, this study discusses the mechanical characteristics of HDRBs by dynamic loading tests under the low temperature environment. Fundamental cyclic loading tests at different temperatures were conducted using 2 types of HDRBs (HDReX and HDR-S). The specimens were tested under shear deformation with a constant vertical compressive stress of 6MPa. Sine waves were applied in the horizontal direction to the specimens. The period of the sine wave was 2.0 sec, and the shear strain was 175%. In these tests, Equivalent stiffness and energy loss of all specimens increased under low temperature and its ratio depended on type of rubber. In the case of increasing shear strain, the temperature dependencies of the equivalent stiffness and energy loss were lower than the result of the fundamental tests. And in the case of decreasing vertical compressive stress, the temperature dependencies were equivalent to the fundamental tests.
  • Analytical investigation on bearing capacity of small steel girder bridge affected by corrosion damage at the end cross beam and stiffness decrease of RC slab
    Iwabuchi Sunao; Miyamori Yasunori; Oshima Toshiyuki; Mikami Shuichi; Saito Takehiko
    Journal of Structural Engineering, A, 66A, 48, 58, Japan Society of Civil Engineers, 2020, [Peer-reviewed], [Corresponding author]
    Japanese, Scientific journal, Previous studies have investigated the load-distributing effect of deteriorated steel girder bridges. However, if end cross beams and an RC slab which can behave as load-distributing members have damage, the load-bearing capacity of the deteriorated bridges needs to be clarified. Thus the interactive load-bearing capacity and vertical displacement at bridge supports of a small H-beam bridge model were analyzed by using the finite displacement method in this study. The analytical result showed that the vertical load above the focused girder was distributed to the adjacent girders via the end cross beams and the RC slab even if the members had damage. However, the stiffness decreations of the end cross beams and the slab reduce the load-bearing capacity of the damaged girder end.
  • Investigation report of geotechnical disaster on river area due to typhoon landfall three times on Okhotsk region, Hokkaido, Japan
    Shunzo Kawajiri; Takayuki Kawaguchi; Yasuharu Watanabe; Hiroshi Hayakawa; Yasunori Miyamori; Dai Nakamura; Satoshi Yamashita
    SOILS AND FOUNDATIONS, 59, 3, 764, 782, Jun. 2019, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Robustness analysis of a structural state identification method based on a 1-D convolutional neural network
    Y. Zhang; Y. Miyamori; T. Saito; S. Mikami; T. Oshima
    9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings, 1, 56, 61, 2019, [Peer-reviewed], [Corresponding author], [International Magazine]
    English, International conference proceedings, 40290995
  • Vibration test and FE analysis of dynamic characteristics of a PC beam with crack and temperature change
    Y. Miyamori; D. Ogawa; K. Kamata; Y. Zhang; T. Saito; H. Choi; T. Oshima
    9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings, 1, 314, 319, 2019, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, International conference proceedings
  • IVESTIGATIING REPORT OF RIVER STRACTURE DAMEGE AT NORTHEN AND EASTERN HOKKAIDO DUE TO HEAVY RAINFALL, JULY 2019
    KAWAJIRI Shunzo; WATANABE Yasuharu; MATSUDA Tomoya; ONMAYASHIKI Kohei; MIYAMORI Yasunori
    Advances in River Engineering, 25, 85, 90, Japan Society of Civil Engineers, 2019, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, In Hokkaido, heavy rain in July 2018 was the largest flood since the heavy rain in Hokkaido in 2016. In small and medium-sized rivers in northern Hokkaido, damages such as breakage of levees and spillage of abutment back embankment occurred. In the eastern part of Hokkaido, a bridge spanning a first class river caused a subsidence of the bridge pier foundation.

    This paper presents basic data that will contribute to future disaster prevention measures regarding the results of the survey of the damage status of river structures that occurred in the Hokkaido and Eastern regions due to torrential rains in July 2018.
  • AUTOMATED FE MODELING FROM 3D POINT CLOUD MODEL OF A DAMAGED STEEL STRUCTURAL MEMBER
    SUZUKI Sanae; MIYAMORI Yasunori; SAITO Takehiko; YAMAZAKI Tomoyuki; DAMBIIBALJIR Munkhjargal; MIKAMI Shuichi
    Journal of Japan Society of Civil Engineers, Ser. F3 (Civil Engineering Informatics), 75, 2, I_141, I_149, Japan Society of Civil Engineers, 2019, [Peer-reviewed], [Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, The recent development of the SfM technique is improving the efficiency of infrastructure management and quantitative evaluation of structural members using such technique is ongoing problems. In this paper, a dense point cloud model of a damaged T-shape steel structural member was constructed from still digital photographs. The 3D point cloud model was converted to an FE model by downsampling of the dense cloud in 3D lattice space and continuous 2D Delaunay triangulation of each section of the member. The reference FE model based on the measured dimension of the specimen was also composed. From comparisons among static loading test of the specimen, and FE analyses of both the point cloud FE model and the reference FE model. Fundamental availability of the FE modeling from SfM was confirmed that the distribution of stress in the web of the steel member consistent with the reference FE model. For the future study, the modeling accuracy of the thickness of the web plate in the point cloud FE model needs to be improved and the modeling algorithm is also modified to avoid defectiveness of solid elements., 40285958
  • Vibration-based structural state identification by a 1-dimensional convolutional neural network.
    Youqi Zhang; Yasunori Miyamori; Shuichi Mikami; Takehiko Saito
    Computer-Aided Civil and Infrastructure Engineering, 34, 9, 822, 839, Wiley, 2019, [Peer-reviewed], [Corresponding author], [International Magazine]
    English, Scientific journal
  • GEOTECHNICAL PROPERTIES AND OBSEARVATION OF EROSION PROCESS BY HYDRAULIC MODEL TEST OF BACK-FILL OF ABUTMENT
    KAWAJIRI Shunzo; KAWAGUCHI Takayuki; WATANABE Yasuharu; MIYAMORI Yasunori; KAWAMATA Sakura; ONMAYASHIKI Kohei; KANEKO Taiki; TAKAHASHI Hiroki
    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 74, 4, I_1273, I_1278, Japan Society of Civil Engineers, 2018, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, The back-fill of the abutment was eroded and a road collapse occurred due to Hokkaido heavy rain disaster in 2016. In this study, the geotechnical investigation was conducted to evaluate the properties of the back fill of the abutment. In addition, the open channel experiment was conducted to observe the basic erosion process of the back fill of the abutment during flowing water condition. Based on the results of the geotechnical investigation, the distribution of the S-wave velocity was different between the right bank and the left bank. From the results of the model test, the erosion of the embankment advanced at the boundary of the structure of the abutment and the embankment.
  • MECHANICAL CHARACTERISTICS OF HIGH DAMPING RUBBER BEARINGS BY DYNAMIC LOADING TESTS UNDER THE LOW TEMPERATURE ENVIRONMENT
    SAITO Takehiko; IRIE Shunsuke; NAKAMURA Yasuyuki; TAKENOUCHI Kosuke; MIYAMORI Yasunori; YAMAZAKI Tomoyuki
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 74, 4, I_765, I_776, Japan Society of Civil Engineers, 2018, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, This study discusses the mechanical characteristics of high damping rubber bearings (HDRBs) by dynamic loading tests under the low temperature environment. Fundamental cyclic loading tests at different temperatures are conducted using 2 types of HDRBs (HDR-S and HDReX) and a natural rubber bearing (NR). In these tests, 175% shear strain of rubber thickness are given by loading facility in cold room. Equivalent stiffness of all specimens increase under low temperature and its ratio depends on type of rubber. Specially equivalent stiffness of HDR-S is significantly larger than other types because of its material characteristic. Internal temperatures of rubber bearings have linear relationship with energy loss. Gradients of the linear functions also depend on rubber type and ambient temperature. In cyclic loading tests under allowable design displacement (250%), the rate of change of the equivalent stiffness and energy loss of HDR-S significantly increase specially in −30°C. Finally, all specimens do not break under cyclic loading test of 120% allowable design displacement under any temperature cases.
  • REPORT ON THE FLOOD DISASTER IN TOKORO RIVER, AUGUST 2016
    WATANABE Yasuharu; HAYAKAWA Hiroshi; KAWAGUCHI Takayuki; KAWAJIRI Shunzo; MIYAMORI Yasunori
    Advances in River Engineering, 23, 31, 36, Japan Society of Civil Engineers, Jun. 2017, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, Several Typhoons attacked the Tokoro river basin in Hokkaido at August, 2016. The maximum rainfall amount for a month of this basin was recorded at this time. At the Futochanae observatory in the downstream part of the Tokoro river, the water level exceeded the design high-water level 4 times during the flood. Overtoppings of the flow happened at several parts around this area. Collapses of the bank arose in the tributaries of the Tokoro river. The river structures in the basin were damaged heavily. In order to grasp the cause of disaster of structures, observations were conducted from immediately after flood damage occurrence. Each cause of disaster is complicated and there was the necessity of synthesizing and examining the knowledge of not only river engineering. Field observation was conducted and the result which contributes to future disaster prevention was obtained from the viewpoint of river engineering, geotechnical engineering and bridge engineering.
  • Spectrogram analysis of local excitation method (LEM) for SHM improvement of damage detection
    T. Oshima; Y. Miyamori; T. Yamazaki; S. Mikami; S. Yasue; Y. Hashidume
    SHMII 2017 - 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Proceedings, 491, 500, 2017, [Peer-reviewed], [International Magazine]
    English, International conference proceedings, 40285961;40285960
  • Effect of ballast state on dynamic parameters of a multispan ballasted prestressed concrete railway bridge
    Y. Zhang; Y. Miyamori; T. Oshima; Y. Shirakawa; S. Mikami; T. Saito
    SHMII 2017 - 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Proceedings, 625, 635, 2017, [Peer-reviewed], [Corresponding author], [International Magazine]
    English, International conference proceedings, 40285959;40291362;40285961
  • Investigation of Seasonal Variations of Dynamic Characteristics of a Concrete Bridge by Employing a Wireless Acceleration Sensor Network System
    Youqi Zhang; Yasunori Miyamori; Takanori Kadota; Takehiko Saito
    SENSORS AND MATERIALS, 29, 2, 165, 178, 2017, [Peer-reviewed], [Corresponding author], [International Magazine]
    English, Scientific journal, 40285959;40291362
  • Dynamic characteristics of a damaged pedestrian overpass measured by wireless sensor array
    Y. Miyamori; T. Kadota; Y. Zhang; S. Mikami
    Transforming the Future of Infrastructure through Smarter Information - Proceedings of the International Conference on Smart Infrastructure and Construction, ICSIC 2016, 167, 172, 2016, [Invited], [International Magazine]
    English, International conference proceedings, 40285960
  • STUDY ON THE EFFECTS OF THE DIFFERENCES IN EVACUATION CONDITIONS ON TSUNAMI EVACUATION RANGE OF REFUGES IN KUSHIRO LOW-LYING AREA
    SAITO Takehiko; SHIMIZU Toshiaki; MIYAMORI Yasunori
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 72, 4, I_569, I_579, Japan Society of Civil Engineers, 2016, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, This study discusses evacuation planning from tsunami disasters due to the difference in evacuation conditions at the low-lying area in Kushiro City. A series of surveys and GIS analyses were carried out in previous studies. In snowy and cold district in winter, a range of refuge for tsunami evacuation decreases because of the decrease of walking speed and impossible to stay outdoors. If it is possible that the early evacuation and more people take in temporary refuges, this range of refuge increases significantly. Therefore, we estimate the effects of travel time to refuge buildings. The result shows that it is difficult to evacuate by the early evacuation only in some areas. Therefore, temporary refuges need to be constructed in such area.
  • Study on the changes of the modal amplitude by repair work of a pedestrian bridge with real damage
    門田 峰典; 宮森 保紀; 綿崎 良祐
    構造工学論文集. A, 61, 143, 152, 土木学会, Mar. 2015, [Peer-reviewed], [Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, In this study, we conduct fundamental study of structural health monitoring based on changes of modal amplitude. The free damped vibration of a pedestrian bridge is measured by using 3D wireless acceleration sensors. The pedestrian bridge has local damage on its girder. The vibration measurement is repeated after the repair work of the girder. From measurement results, natural frequencies of each mode don't change by repair work. Modal amplitudes are changed in several vibration modes. COMAC method is applied to discuss the effect of modal amplitude changes and the change of COMAC is larger on the nearest point of the damage., 40285960
  • Structural vibration characteristics of a pedestrian bridge by the 3D acceleration sensing of smart sensors and detailed 3D-FEM model
    Takanori Kadota; Yasunori Miyamori; Ryosuke Watasaki; Shuichi Mikami; Takeliiko Saito
    IABSE Conference, Nara 2015: Elegance in Structures - Report, 308, 309, 2015, [Peer-reviewed], [Corresponding author], [International Magazine]
    English, International conference proceedings, 40285960
  • Numerical simulation of Local Excitation Method (LEM) to detect small defect of structure for structural health monitoring
    T. Oshima; Y. Miyamori; S. Mikami; T. Yamazaki; S. Beskhyroun
    SHMII 2015 - 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure, 2015, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
    English, International conference proceedings, 40285961;40285962
  • Early damage localization of steel structures based on changes of modal amplitude
    Y. Miyamori; N. Kouso; S. Mikami; T. Oshima; T. Kadota; T. Saito
    SHMII 2015 - 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure, 2015, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, International conference proceedings, 40285961;40285962
  • Damage detection at multiple locations in reinforced concrete structures using algorithm based on transfer function estimate
    P. Rathish Kumar; Toshiyuki Oshima; Shuichi Mikami; Yasunouri Miyamouri
    Indian Concrete Journal, 88, 8, 33, 43, Aug. 2014, [Peer-reviewed], [Last author], ［Internationally co-authored］, [International Magazine]
    English, Scientific journal, 40285960
  • A Study of Tsunami Evacuation with Consideration for Damage to Tall Buildings in Kushiro City
    SAITO Takehiko; MURAMOTO Honoka; MIYAMORI Yasunori; MIYAMORI Yasunori
    Journal of Social Safety Science, 24, 22/24, 151, 159, Institute of Social Safety Science, 2014, [Peer-reviewed], [Last author], [Domestic magazines]
    Japanese, Scientific journal, This study discusses evacuation planning from tsunami disasters at the low-lying area in Kushiro City by using existing tall buildings as temporal refuges. Serviceability of refuges is influenced by damage to buildings due to seismic ground motions. We estimate the damage to the buildings using a fragility function. In the worst case, the coverage area of evacuation decreases by 80% because of the damage to tall buildings. And the variability of coverage area in the histogram shows that the means value approximately coincides with the mode.
  • A VIBRATION-BASED STRUCTURAL IDENTIFICATION OF A PEDESTRIAN BRIDGE BY 3D SMART ACCELERATION SENSORS AND HIGH RESOLUTION FE MODEL
    KADOTA Takanori; MIYAMORI Yasunori; OKAMOTO Akito; WATASAKI Ryosuke; MIKAMI Shuichi; SAITO Takehiko
    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)), 70, 2, I_887, I_897, Japan Society of Civil Engineers, 2014, [Peer-reviewed], [Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, In this study, we conducted fundamental study of structural health monitoring by using 3D smart acceleration sensors and high resolution FE model of a pedestrian bridge.Vibration measurement is performed at a pedestrian bridge having an actual damage by using Imote2 smart sensors. Several vibration modes are identified and compared to eigenvalue analysis of detailed FE model. In FE modeling, stairs restrain girders of the pedestrian bridge and its modal shapes are affected by the connection between stairs and girders. Vibration characteristics of updated FE model are improved in both natural frequencies and mode shapes.
  • Small damage detection of real steel bridge by using local excitation method
    Toshiyuki Oshima; Yasunori Miyamori; Shuichi Mikami; Tomoyuki Yamazaki; Sherif Beskhyroun; Maria Fabijanska Kopacz
    Journal of Civil Structural Health Monitoring, 3, 4, 307, 315, Dec. 2013, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
    English, Scientific journal
  • Assessment of vibration-based damage identification techniques using localized excitation source
    Sherif Beskhyroun; Toshiyuki Oshima; Shuichi Mikami; Yasunori Miyamori
    Journal of Civil Structural Health Monitoring, 3, 3, 207, 223, Aug. 2013, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Numerical analysis of small defect detection of beam by using lacal excitation method
    Miyamori Yasunori; Oshima Toshiyuki; Mikami Shuichi; Yamazaki Tomoyuki; Takahashi Toru
    構造工学論文集 Ａ, 59, 311, 319, 公益社団法人 土木学会, Mar. 2013, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, By using piezoelectric actuator bridge can be accelerated locally to detect theeffect of small damage like fatigue crack as a response change of vibration.Transfer function (TF) of the vibration response can give us the indication ofexistence of damage before and after the damage. Detail analysis of TF beforeand after damage can inform us location and size (area) of damage. This papershows the result of numerical analysis of damage detection on beam member byusing local force excitation method.
  • Basic study on damage localization of steel bridges based on the changes of modal amplitude
    N. Kouso; Y. Miyamori; S. Mikami; T. Oshima; T. Saito
    Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, 2013, [Corresponding author], [International Magazine]
    English, International conference proceedings, 40285962
  • Application of smart sensors for bridge vibration measurement under low temperature environment
    A. Okamoto; R. Watasaki; K. Pan; Y. Miyamori; S. Mikami
    Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, 2013, [Corresponding author], [International Magazine]
    English, International conference proceedings, 40291362
  • A BASIC STUDY OF TSUNAMI EVACUATION TO SHELTER BUILDINGS AND CIVIL STRUCTURES IN KUSHIRO CITY
    MIYAMORI Yasunori; UCHIUMI Kota; SHIMIZU Toshiaki; YAMASAKI Shintaro; OTSUKA Hisanori
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 69, 4, I_919, I_931, Japan Society of Civil Engineers, 2013, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, We discuss evacuation planning from tsunami disasters in Kushiro City. The city has not experienced severe tsunami disasters since the recorded history of the 19th century. However, "Ainu", an aborigine of Hokkaido, has been brought down past severe tsunami disasters by word of mouth. In addition, geological evidences indicate them as well. The Hokkaido Prefectural Government announced new data and maps obtained by the tsunami simulation that is reconstructed on account of the geological evidences of the past huge tsunami disasters. We performed on-site investigation by using geographical survey, and used GIS analysis. Then, we concluded that survivability will increase without new evacuation buildings for tsunami disasters if we use tall buildings and elevated highways which have been used, as temporal evacuation sites.
  • Detection and localization of small damages in a real bridge by local excitation using piezoelectric actuators
    P. Rathish Kumar; Toshiyuki Oshima; Tomoyuki Yamazaki; Shuichi Mikami; Yasunouri Miyamouri
    Journal of Civil Structural Health Monitoring, 2, 2, 97, 108, Sep. 2012, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Damage identification in a lightly reinforced concrete beam based on changes in the power spectral density
    Rathish P. Kumar; T. Oshima; S. Mikami; Y. Miyamori; T. Yamazaki
    Structure and Infrastructure Engineering, 8, 8, 715, 727, Aug. 2012, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • DEVELOPMENT OF PSEUDO-DYNAMIC SIMULATION SYSTEM WITH A GENERAL FEM SOFTWARE AT LOW-TEMPERATURE ENVIRONMENT
    宮森保紀; 湯村美紀; 藤生重雄; 樋口匡輝; 山崎智之; 三上修一; 大島俊之
    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 68, 4, I_608, I_616, Japan Society of Civil Engineers, 2012, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, In this study, A substractured pseudo-dynamic simulation system for low-temperature environment is developed. The developed system utilizes an open-source pseudo-dynamic system UI-SIMCOR and a sub-program which can cooperate with existent loading facility in a cold room is developed. To enhance usability of the system, another sub-program is also developed for application of general FEM software.
     A simulation for a simple girder model with seismic damper is performed. Dynamic response of the damper is obtained as a part of whole structure and friction type displacement-force hysteresis curve is properly obtained. The maximum displacement is reduced 80% by energy dissipation of the damper. The result of the simulation is not affected by low temperature because the damper is stable to lowtemperature as shown in previous studies.
     Hence, the system is able to work properly as a substructred pseudo-dynamic simulation facility at a low-temperature environment. For farther development, velocity control of loading equipment will improve accuracy of simulation results., 40285963
  • A vibration measurement of a pedestrian suspension bridge and development of anti-low temperature measurement system for smart sensor
    Miyamori Yasunori; Ban Kazuhei; Oshima Toshiyuki; Mikami Shuichi; Yamazaki Tomoyuki
    Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 58, 216, 225, Japan Society of Civil Engineers, 2012, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
    Japanese, Scientific journal, Smart sensor systems are expected to be a suitable sensing solution for structural health monitoring of infrastructures because such sensors can transfer data via wireless network. In this study, an Imote2 smart sensor system is applied for bridge vibration measurement test. Weather proof housing with solar energy harvesting system is also developed for outdoor measurement. A cold room test of the housing has been done before real bridge measurement. The test bridge is an old pedestrian suspension bridge. Measurement results revealed that the developed solar energy system supplies enough power to a smart sensor. Natural vibration modes of the bridge are detected from free vibration data properly., 40291362
  • Damage identification of civil infrastructures with array sensing under local excitation
    Toshiyuki Oshima; Shuichi Mikami; Yasunori Miyamori; Tomoyujki Yamazaki; Sherif Beskhyroun
    Structural Health Monitoring of Intelligent Infrastructure - Proceedings of the 4th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII 2009, 2009, [Peer-reviewed], [Domestic magazines]
    English, International conference proceedings
  • Study on functional characteristics of shock absorbing rubber and its application to real bridges
    Aochi Tomoya; Oshima Toshiyuki; Miyamori Yasunori; Masuda Kenji; Wakasugi Hiroshi
    Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 55, 768, 777, Japan Society of Civil Engineers, 2009, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal, Functional characteristics of shock absorbing rubber is investigated by dynamic loading test and load- displacement relationship and its energy absorption characteristics are obtained in this study. By modeling its energy absorption characteristics, application to real bridge structures is analyzed by numerical calculations. And proposed shock absorbing rubber functioned well for strong earthquake impact and effectiveness to real bridges was shown in numerical results.
  • Nonlinear seismic response analysis of steel cable stayed bridge model based on vibration monitoring data
    Kimura Hiroshi; Miyamori Yasunori; Mikami Shuichi; Yamazaki Tomoyuki; Oshima Toshiyuki
    Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 55, 317, 328, Japan Society of Civil Engineers, 2009, [Peer-reviewed], [Corresponding author], [Domestic magazines]
    English, Scientific journal, Structural monitoring is expected to improve accuracy of seismic performance evaluation of existing structures. Vibration monitoring data is suitable for composing dynamic numerical model and ambient vibration data are available instead of limited number of seismic data. In this study, a steel cable stayed bridge is modeled based on ambient vibration data and its bearing are represented in bilinear model. Validity of the model is confirmed by dynamic response analysis for recorded minor seismic waves. Then large seismic ground motions are input to the model and different action of bearing is confirmed. Hence the entire responses of the bridge are reasonable for each seismic input by using the proposed model.
  • Steel bridges in the Furusato Ginga Line (formar Chihoku Line)
    Yasunori Miyamori; Tatsuo Shirakawa; Tomoyuki Yamazaki; Hiroyoshi Onishi; Shuichi Mikami; Toshiyuki Oshima
    Journal of historical studies in civil engineering, 28, 13, 21, 土木学会, 2009, [Lead author, Corresponding author], [Domestic magazines]
    Japanese, Scientific journal
  • Long-term remote monitoring of a cable stayed bridge and seasonal fluctuation of modal parameters
    Y. Miyamori; H. Kimura; T. Oshima; T. Ayame
    Proceedings of the World Forum on Smart Materials and Smart Structures Technology, SMSST'07, 86, 87, 2008, [Lead author, Corresponding author], [Domestic magazines]
    English, International conference proceedings
  • Investigation on initial structural condition and analytical modeling of U-shaped steel girder bridge
    Mikami Shuichi; Miyamori Yasunori; Oshima Toshiyuki; Ishikawa Hiroyuki; Kadota Takanori
    Journal of Structural Engineering, A, 54A, 538, 547, Japan Society of Civil Engineers, 2008, [Peer-reviewed], [Domestic magazines]
    English, Scientific journal, Initial condition measurement of static deformation behavior before its service start and vibration characteristics on completed bridge of U-shaped steel girder bridge, are dealt with in this paper. The 3-dimensional Finite Element Method is used to model this tested bridge. The deformation characteristics of shoes was measured and detailed modeling of this effects needs to consider. And the natural frequency characteristics of their modes are examined using the ERA (Eigensystem Realization Algorithm) method. Simulation analysis considering road surface irregularity and coupling effects between vehicle and bridge was done. The data of this analysis is utilized to monitor the change of deformation and vibration characteristics due to the degradation and damage of bridge.
  • Issues in structural health monitoring employing smart sensors
    T. Nagayama; S. H. Sim; Y. Miyamori; B. F. Spencer
    Smart Structures and Systems, 3, 3, 299, 329, Jul. 2007, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
    English, Scientific journal
  • Comparison between seismic response analysis and monitoring data on steel cable-stayed bridge
    MIYAMORI Yasunori; IKEDA Noritoshi; KIMURA Hiroshi; MIKAMI Shuichi; OSHIMA Toshiyuki
    Proceedings of the JSCE Earthquake Engineering Symposium, 29, 468, 474, Japan Society of Civil Engineers, 2007, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
    English, Scientific journal, A 3D model for dynamic response analysis is composed based on ambient vibration monitoring data. Natural excitation technique and Eigenrealization algorithm (ERA) are applied to obtain modal parameters. A analytical modal parameters of the model are consistent with the real modal parameters calculated by ERA. Dynamic response analysis are performed for several small earthquake waves and their analytical results are agreed with response of actual monitored data. Dynamic response analysis are also performed for severe earthquake waves.
  • APPLICATION OF A VIBRATION-BASED DAMAGE DETECTION ALGORITHM ON A BENCHMARK STRUCTURE
    Shuichi Mikami; Sherif Beskhyroun; Yasunori Miyamori; Toshiyuki Oshima
    PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON STRUCTURE HEALTH MONITORING & INTELLIGENT INFRASTRUCTURE: STRUCTURAL HEALTH MONITORING & INTELLIGENT INFRASTRUCTURE, 2007, [Peer-reviewed]
    English, International conference proceedings
  • Identification of a human walking force model based on dynamic monitoring data from pedestrian bridges
    Takashi Obata; Yasunori Miyamori
    Computers and Structures, 84, 8-9, 541, 548, Mar. 2006, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • A study on evaluation of ground displacement and effect of piles, joints and ground property in seismic design for axial direction of immersed tunnels by seismic displacement method
    橘義規; 大塚久哲; 宮森保紀; 矢野恵美子
    構造工学論文集 A, 51A, 1, 2005, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
  • Experimental and analytical studies on structural instabilities during an earthquake
    大塚久哲; 為広尚起; 宮森保紀; 藤井義法; 清水晋作
    構造工学論文集 A, 51A, 1, 2005, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
  • 橋梁点検データと意識調査に基づいた劣化順位決定手法に関する一考察
    小幡卓司; 井田俊輔; 宮森保紀; 林川俊郎; 佐藤浩一
    構造工学論文集 A, 50A, 2, 2004, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
  • 不規則外力を受ける塔状構造物の可変剛性・減衰型振動制御に関する研究
    宮森保紀; 小幡卓司; 安達一憲; 林川俊郎; 佐藤浩一; 大塚久哲
    構造工学論文集 A, 50A, 1, 2004, [Peer-reviewed], [Lead author], [Domestic magazines]
    Japanese, Scientific journal
  • 鋼橋の損傷同定における音響モニタリングの適用に関する基礎的研究
    小幡 卓司; 植田 康平; 宮森 保紀
    応用力学論文集, 5, 827, 836, 土木学会, 2002, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
  • Identification of Human Walking Force Model Based on Dynamic Characteristics of Pedestrian Bridges
    Yasunori Miyamori; Takashi Obata; Tosiro Hayashikawa; Koichi Sato
    Journal of Structural Engineering, 47A, 2, 343, 350, 2001, [Peer-reviewed], [Lead author], [Domestic magazines]
    Japanese, Scientific journal
  • A consideration of applicability to semi-active variable damping control on bridge structures
    Yasunori Miyamori; Takashi Obata; Toshiro Hayashikawa; Koichi Sato
    Journal of Structural Engineering, 47A, 2, 371, 380, 2001, [Peer-reviewed], [Lead author], [Domestic magazines]
    Japanese, Scientific journal
  • Consideration of applicability of active stiffness control system on cable structures
    Takashi Obata; Yasunori Miyamori; Keisuke Inoue; Toshiro Hayashikawa; Koichi Sato
    Journal of Structural Engineering, 45A, 737, 744, Mar. 1999, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
■ Other Activities and Achievements
■ Books and other publications
  • 2018年北海道胆振東部地震・大阪府北部の地震被害調査報告書
    土木学会; 土木学会地震工学委員会; 土木学会地震工学委員会地震被害調査小委員会
    土木学会,丸善出版(発売), Sep. 2019, 9784810610048, 372, 73p, Japanese, Report, [Peer-reviewed], [Joint editor]
  • Wireless sensor networks for civil infrastructure monitoring: a best practice guide
    David Rodenas-Herráiz; Kenichi Soga; Paul R A Fidler; Nicholas de Battista, Ainonai pedestrian overpass (Japan)
    ICE Publishing, Jul. 2016, 9780727761514, 210, 6, English, Scholarly book, Wireless Sensor Networks for Civil Infrastructure Monitoring provides expert guidance on the selection and use of wireless sensor network (WSN) technology for the structural monitoring of both existing infrastructure and new construction projects. The purpose of this guide is to consolidate a generic methodology for the design and implementation of WSNs for monitoring civil engineering infrastructure, coupled with best practice for data management and information valuation., ［Internationally co-authored］, 40285960, [Contributor]
  • センシング情報社会基盤
    土木学会構造工学委員会センシングと情報社会基盤研究小委員会; 土木学会
    土木学会,丸善出版 (発売), Mar. 2015, 9784810608762, 298p, Japanese, Scholarly book, [Peer-reviewed], [Joint editor]
  • 歩道橋の設計ガイドライン
    土木学会構造工学委員会歩道橋の設計ガイドラインに関する研究小委員会; 国際コンクリート連合; 土木学会
    土木学会,丸善 (発売), Jan. 2011, 9784810607147, xvii, 324p, Japanese, Scholarly book, ［Internationally co-authored］, [Peer-reviewed]
  • 実践建設系アセットマネジメント : 補修事業計画の立て方と進め方
    大島, 俊之
    森北出版, Oct. 2009, 9784627452411, vi, 206p, Japanese, Textbook, [Contributor]
  • モニタリングによる橋梁の性能評価指針〈案〉 (構造工学シリーズ (16))
    土木学会構造工学委員会橋梁振動モニタリングとその標準化小委員会; 中島, 章典
    土木学会, 01 Jun. 2006, 4810605345, 85, Japanese, Scholarly book, [Peer-reviewed], [Contributor]
■ Syllabus
  • 振動解析特論, 2024年, 修士課程, 工学院
  • 振動解析特論, 2024年, 博士後期課程, 工学院
  • 構造力学Ⅰ, 2024年, 学士課程, 工学部
  • 構造力学Ⅱ, 2024年, 学士課程, 工学部
  • 構造力学演習Ⅰ, 2024年, 学士課程, 工学部
  • 構造力学演習Ⅱ, 2024年, 学士課程, 工学部
  • 社会基盤と国土政策, 2024年, 学士課程, 工学部
■ Affiliated academic society
  • Dec. 2017 - Present
    International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII)
  • Sep. 1998 - Present
    Japan Society of Civil Engineers
■ Research Themes
  • Development of Structural Performance Evaluation Technology Using Digital Twin Bridge Models
    イノベーション創出研究支援事業産学連携創出補助金
    Aug. 2025 - Mar. 2026
    Sato Makoto; Obara Moeka
    Northern Advancement Center for Science ＆ Technology, Hokkaido University, Principal investigator, S-2-3
  • Structural performance evaluation of real civil infrastructure by merging dense point cloud data into FE analysis
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    01 Apr. 2021 - 31 Mar. 2024
    宮森 保紀
    本研究は鋼構造物を対象として、設計図書などに基づき構築されたFEMモデルに、供用中の実構造物の損傷部分を撮影して得られた点群モデルを融合させ、損傷を受けた実構造物のFEMモデルを構築し、実構造物の性能評価が高精度に可能な方法を創出する。
    橋梁の設計では有限要素法（Finite Element Method）による構造解析が一般化したが、供用中の構造性能の評価でFEMを用いることはほとんどない。一方、実構造物を撮影した画像データを用いて近接目視点検を代替する取り組みが進んでいるが、応力状態の把握など構造性能の定量的評価はできない。そこで本研究では両者を融合させ、構造物のライフサイクルに一貫して適用可能な数値モデル構築手法を開発する。
    具体的には、損傷を受けた構造物の保有性能を定量的に評価するため、健全部を含む構造全体は従来のFEMでモデル化し、損傷を受けた部分のみ撮影画像から高密度点群モデルを構築し損傷部分の節点座標を得る。この損傷部分の節点座標を構造全体のFEMモデルに取り込み、損傷部分の応力状態を評価可能なFEMモデルを構築する方法を開発する。
    2021年度は、鋼橋を対象に損傷部材を精度よく高密度点群モデルにする方法の確立に取り組んだ。具体的には撮影角度や距離、被写体の照度を変えながら、モデル化の精度を検討した。次に撮影した画像から3次元点群モデルを構築し、FEMモデルへの変換を行うが、2021年度は、FEMモデルへの変換に際して、より汎用性の高いファイル形式へ対応させる変更を行うとともに、要素構築手法を見直し、要素の欠損を低減する手法を開発した。
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 21K04230
  • Direct transform from dense point cloud data to finite element model for structural analysis
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    01 Apr. 2018 - 31 Mar. 2021
    Miyamori Yasunori
    We developed a method for quantitatively evaluating the structural performance of existing civil infrastructures. We firstly constructed a dense point cloud model from images taken with a digital camera, which is so dense that even thickness changes of steel structural members can be detected. And then the dense point cloud model was converted into a FEM model that can be used for structural analysis. From a large number of digital images, a point cloud model is created using SfM, and solid elements for FEM analysis were created and stress analysis is performed.
    In the feasible study, laboratory-scale specimens and large actual scale structures were chosen. Steel members of experimental structures could be modeled in 2% error. In FE structural analysis, the distribution of stress was reproduced following the compatible FE model established by the common method.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 18K04317
  • Research and development of a low-cost, widespread measurement system for remote diagnosis of damaged bridges in snowy and cold regions
    A-STEP
    Sep. 2019 - Mar. 2021
    宮森保紀; 三上 修一; 日向洋一; 今泉宜人
    H28北海道豪雨など、広大な寒冷地で被災した橋梁の安全管理を長期間安定的に行う計測システムの開発が課題である。課題解決には、廉価かつ温度変化などの影響を受けない高精度の測定システムとデータを遠隔地から安定して送受信できる通信システムが必要であり、計測・安全装置の開発企業と低温でのインフラ監視の知見と大規模屋外実験場などの大学のシーズを結びつける。また、橋梁の安全管理には適切な安全閾値を過去の被災例や大規模試験場の実験、FEM解析などに基づいて工学的に決定する必要もあり、インフラの維持を行ってきた企業の経験と大学の学術的な知見を結びつけ、道路管理者が導入しやすいシステムとして事業化を目指す。
    JST, Kitami Institute of Technology, Principal investigator, Competitive research funding, 19197825
  • Research and development of a measurement system that enables remote diagnosis of bridges in communication-deficient areas during snowy and cold weather
    イノベーション創出 研究支援事業（スタートアップ研究補助金）
    Aug. 2019 - Mar. 2020
    宮森保紀; 三上修一; 日向洋一; 今泉宜人
    北海道科学技術総合振興センター（ノーステック財団）, Kitami Institute of Technology, Principal investigator, Competitive research funding
  • Comprehensive study on the 2018 Hokkaido Eastern Iburi Earthquake and its disaster
    Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes
    04 Oct. 2018 - 31 Mar. 2019
    Takahashi Hiroaki
    Comprehensive investigation on the 2018 Hokkaido Eastern Iburi earthquake and its disaster was conducted. Mainshock rupture initiated at deepest part and major slip was occurred in 20-30km deep. Multiple simultaneous landslides in Atsuma town was induced by combination of strong ground shaking and weak sliding layer between pyroclastic fall deposit layers. Halloysite cray minerals was discovered in all sliding layers. Simulation suggested landslides might attack residential houses within 6 seconds. Observed peak ground motions in nearby area were larger than common distance attenuation model. Severe wooden house damage in Mukawa town was due to amplified seismic waves due to site effects. Sounding and boring investigation revealed filled low-density volcanic ash and higher groundwater level in liquefaction area. Electricity blackout caused severe damage in social and economic activities of Hokkaido. These scientific outcomes were explained to residents at public briefing session.
    Japan Society for the Promotion of Science, Grant-in-Aid for Special Purposes, Hokkaido University, 18K19952
  • Hybrid damage detecting method with high density modal idenntification and thermographic examination of infrastructural system
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    01 Apr. 2015 - 31 Mar. 2018
    Miyamori Yasunori
    To realize structural health monitoring using vibration measurement data, even though the structure keeps intact condition, its dynamic characteristics fluctuate due to the influence of temperature and other environmental conditions. Therefore, in this study, vibration measurement was carried out on concrete specimens and actual bridge, and it was confirmed that the change of the vibration characteristics by internal temperature is important for identifying structural damages. In particular, in the prestressed concrete specimen, effects of both temperature change and cracks of concrete member was examined. As a result, the vibration characteristics change caused by large damage exceeds the effect of the temperature change while temperature effects is still large for small damaged or intact structure. In addition, it was also found that the measured value fluctuated greatly in the temperature measurement of the thermographic camera in the real environment.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 15K06176
  • Research and development of high-resolution reproducible 3D models by robot photography and implementation in society
    エネルギー・環境新技術先導プログラム
    Apr. 2017 - Mar. 2018
    與那覇誠; 堀田修平; 小野修司; 菊池浩明; 山崎文敬; 向井朗; 吉葉寛一; 高野敏之; 小山一人; 洞口克彦; 宮森保紀; 泉保則; 早川吉彦
    １ 社会インフラを初めとする国内高度成長期に建設した多くの建造物の約半分が2030年度に築後50年以上と言われている。これらの維持・管理費用は6兆円(2020年)、１0兆円(2030年)と推定され、国家財政圧迫が懸念されている。一方、少子高齢化傾向の進行で維持、管理技術を保有する熟練技術者が不足も懸念されている。
    ２ 一方、少子高齢化傾向の進行で維持、管理技術を保有する熟練技術者が不足が懸念されている。社会インフラを構成する構造物(橋梁、トンネル、ダム、港湾等)の設計・施工・維持・管理の電子的一元化を目指する。 特に、電子化が遅れている維持・管理についての設計・施工から一貫した建造物の管理を実現する為の研究を行う。
    3 その上で、下記の二点を実施する(1) 電子的一元化の中で、最もIT化、電子化が必要な維持管理(特に再利用可能な点検データの取得)について橋梁にフォーカスした研究を行う
    (2) 2030年に向けた課題・達成シナリオ、ビジネスモデル、社会実装等の5カ年計画提案を行う専門委員会に設置と運営
    １）点検技術者の高齢化、減少、進歩する技術の積極的適用の具体化
    ２）予算上の問題 等が待ち受ける地方での社会実装と実施に向けた重要5課題の抽出と解決スケジュール立案
    NEDO, Kitami Institute of Technology, Competitive research funding, 17934302
  • Structural health monitoring of bridges with high density smart sensor array
    Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    01 Apr. 2013 - 31 Mar. 2015
    MIYAMORI Yasunori
    A vibration based Structural Health Monitoring (SHM) is expected to be a key technique to improve structural safety. A smart sensor which is an electronic device using MEMS (Micro Electro Mechanical Systems) has a potential to enable efficient vibration measurement because of its wireless communication function and on-board processing ability.
    In this study, vibration measurement experiments on real bridges were performed to establish the working knowledge of smart sensor system and the damage identification method which was proposed in this study. The experiments were performed on a damaged pedestrian bridge. From experimental results, mode shapes slightly changed through repair work though its natural frequencies did not change. The largest value of a proposed damage index was obtained at the sensor near the damaged point.
    Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Kitami Institute of Technology, 25870025
  • Smart sensor-based bridge health monitoring system to detect deterioration of bridges
    Aug. 2012 - Feb. 2013
    宮森保紀
    北海道科学技術総合振興センター（ノーステック財団）, 若手研究人材育成事業（若手研究人材・ネットワーク育成補助金（Talent補助金））, Principal investigator, Competitive research funding
  • Feasible study of smart sensors for structural health monitoring by using old steel railway bridges.
    Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    2009 - 2010
    MIYAMORI Yasunori
    Smart sensor system which has radio transmission and data processing capacity is expected to be applied for structural health monitoring for bridge or other infrastructures. In this study, applicability of the sensor system is tested in testbed. The system needs energy harvesting system for long term use under severe environment. The developed system is tested in a cold room and real bridge testbed.
    Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Kitami Institute of Technology, 21710166
  • 構造物の自動化健全度診断システムの開発と廃橋梁群を利用した実規模実験環境の構築
    科学研究費助成事業 特別研究員奨励費
    2008 - 2008
    宮森 保紀; BESKHYROUN S. F.
    日本学術振興会, 特別研究員奨励費, 北見工業大学, 08F08390
  • 低温仮動的試験システムの開発と免震橋梁の低温地震応答特性の解明
    科学研究費助成事業 若手研究(B)
    2006 - 2007
    宮森 保紀
    地震時における低温環境下特有の諸現象を解明するためのハイブリッド型実験システムを開発した。この実験システムは橋梁や建物などの地震時挙動を検討する際に、解析対象を構造実験部分と数値実験部分に分割し、部材の挙動が数値モデル化できる部分は数値実験を、部材の挙動を実験的に明らかにする必要がある部分については構造実験を行うものである。このような実験手法はこれまで多くの成果が報告されているが、寒冷環境下で実験環境を構築した例はない。寒冷環境下では常温と比較してゴム支承、鋼部材、表層地盤などの特性が変化することが知られているが、これまでは部材単体としての検討にとどまり、構造全体として地震時の応答を実験的に明らかにした例はない。このような寒冷地に特徴的な現象を解明し地震被害を軽減することは、均衡ある国土の安全性の確保に貢献するともに、北方圏のエネルギー産出地の安全性向上に寄与する。
    本研究では、具体的には米国イリノイ大学で開発されたソフトウェア群(UI-SIMCOR)を応用し、これを北見工業大学が保有する低温域材料・構造実験システムに適用することで低温サブストラクチャ仮動的試験システムの構築を行う。計算部分と実験部分の制御を行うサーバを構築し、動作検証を行う小型模型実験装置を製作した前年度に引き続きシステムの改修を行った。具体的には共同利用のため学外に計算部分を設けた場合にも対応できるよう新たなサーバの構築とネットワーク環境の整備を行った。実験部分は低温域材料・構造実験システムに接続するためのシステム改修を行ったが、システム改修の過程でUI-SIMCORの最新版が配布されたため、将来の拡張性を考慮して対応に着手した。対応完了後、低温構造実験システムを利用した制震装置を有する橋梁のハイブリッド実験を実施する。
    日本学術振興会, 若手研究(B), 北見工業大学, 18760341