Changes in the Dynamic Characteristics of a Small-Scale Gymnasium Model Due to Simulated Earthquake Damage
Jun Fujiwara*,, Akiko Kishida*, Takashi Aoki**, Ryuta Enokida***, and Koichi Kajiwara*
*National Research Institute for Earth Science and Disaster Resilience (NIED)
1501-21 Nishikameya, Mitsuda, Shijimi, Miki, Hyogo 673-0515, Japan
**National Research Institute for Earth Science and Disaster Resilience (NIED), Ibaraki, Japan
***International Research Institute of Disaster Science (IRIDeS), Tohoku University, Miyagi, Japan
In this study, the authors used shake-table tests to assess the modal parameters of a small-scale gymnasium model with simulated damage, the feasibility of estimating the damage to large-span building structures was studied. In Japan, large-span structures, such as gymnasiums, are expected to be used as evacuation shelters when a natural disaster occurs. As the shelter itself may be damaged in case of an earthquake, it is critical to determine whether damage has occurred, where it occurred, and how serious it is, before the shelter is used. The small-scale gymnasium was designed based on the similarity rule. Observed earthquake ground motions scaled to aftershock levels were applied to the model. The natural frequencies and mode shapes were obtained from the measured response accelerations. To study the influence of structural damage on the modal parameters, a gymnasium model with simulated damage was also tested. The results indicate that the modal parameters, e.g., natural frequencies and mode shapes, can be obtained from the response accelerations, and the damage patterns can be estimated from the changes in these modal parameters.
-  Architectural Institute of Japan, Joint Editorial Committee for the Report on the Great East Japan Earthquake Disaster, “Report on the Great East Japan Earthquake Disaster, Building Series Vol.3, Structural damage to steel buildings, Structural damage to shell and spatial structures,” Maruzen, 2014 (in Japanese).
-  Architectural Institute of Japan, “Report on the damage investigation of the 2016 Kumamoto Earthquakes,” Maruzen, 2018 (in Japanese).
-  J. M. W. Brownjohn, “Structural health monitoring of civil infrastructure,” Phil. Trans. R. Soc. A, Vol.365, No.1851, pp. 589-622, 2007.
-  M. Shirono, K. Fujita, and I. Takewaki, “Stiffness identification of building with unknown vibration source using bending-shear model and ARX model,” J. of Structural and Construction Engineering (Trans. of AIJ), Vol.80, No.716, pp. 1559-1567, 2015 (in Japanese).
-  K. Soma, K. Kanazawa, K. Hara, and H. Kitamura, “System identification of a fish-bone model for using damage detection of steel moment frame building,” J. of Structural and Construction Engineering (Trans. of AIJ), Vol.81, No.729, pp. 1831-1841, 2016 (in Japanese).
-  T. Hamamoto, I. Kondo, and R. Kanno, “Damage detection of spatial structures using system identification approach,” J. of Structural Engineering, Vol.40B, pp. 189-196, 1994 (in Japanese).
-  J. Xu, J. Hao, H. Li, M. Luo, W. Guo, and W. Li, “Experimental Damage Identification of a Model Reticulated Shell,” Applied Science, Vol.7, No.4, Article 362, 2017.
-  R. Suzuki, D. Sato, T. Sasaki, A. Aoi, K. Kajiwara, and H. Tagawa, “Natural frequency variation and damages in vibration tests of full scale steel gymnasium using E-Defense,” J. Structural Engineering, Vol.63B, pp. 241-250, 2017 (in Japanese).
-  T. Sasaki, A. Aoi, H. Tagawa, K. Kajiwara, T. Arai, T. Kanai, M. Takaoka, Y. Iwashita, M. Yoshizawa, T. Kabeyazawa, T. Seike, S. Yamada, H. Fukuyama, T. Ota, T. Eguchi, J. Iyama, T. Ishihara, and D. Isobe, “Collapse Mechanism of Wide-area Suspended Ceiling System Based on E-Defense Full-scale Shake Table Experiments –Shake Table Experiments on Non-seismic Suspended Ceiling and Seismically Designed Suspended Ceiling–,” Technical Note of the National Research Institute for Earth Science and Disaster Prevention, No.391, 2015 (in Japanese).
-  T. Sasaki, A. Aoi, H. Tagawa, K. Kajiwara, D. Sato, T. Kabeyazawa, T. Seike, S. Yamada, and H. Fukuyama, “Design and structural response of full-scale steel gymnasium specimen: E-Defense shake table experiment on collapse mechanism of wide-area suspended ceiling in gymnasium part 1,” J. of Structural and Construction Engineering (Trans. of AIJ), Vol.82, No.736, pp. 831-841, 2017 (in Japanese).
-  Archives of E-Defense Shakingtable Experimentation Database and Information (ASEBI), National Research Institute for Earth Science and Disaster Resilience (NIED), “Experiment on non-structural members in large-span building structure,” https://doi.org/10.17598/nied.0020 [accessed July 29, 2019]
-  Architectural Institute of Japan, “Damping and response control of shell and spatial structures,” Maruzen, 2008 (in Japanese).
-  J. Y. Zhang and T. Aoki, “Dynamic experiments on an HP shell roof,” 12th Asian Pacific Conf. on Shell & Spatial Structures, pp. 554-559, 2018.
-  T. Tang, D.-H. Yang, L. Wang, J.-R. Zhang, and T.-H. Yi, “Design and Application of Structural Health Monitoring System in Long-Span Cable-Membrane Structure,” Earthquake Engineering and Engineering Vibration, Vol.18, No.2, pp. 461-474, 2019.
-  J. Fujiwara and K. Kajiwara, “Hammering test of small-scaled gymnasium and change of vibration characteristics due to simulated damages,” J. of Structural Engineering, Vol.67B, pp. 243-250, 2021 (in Japanese).
-  Building Performance Standardization Association, “Typical observed seismic waves (acceleration data),” https://www.seinokyo.jp/jsh/top/ (in Japanese) [accessed April 12, 2019]
-  A. Nagamatsu, “Introduction to Modal Analysis,” Corona Publishing Co., Ltd., 1993 (in Japanese).
-  MathWorks, “MATLAB Signal Processing Toolbox Reference,” R2019a, 2019.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 International License.