Postearthquake Investigation of a Base-Isolated Building in the 2022 Ms 6.8 Luding Earthquake
Publication: Journal of Performance of Constructed Facilities
Volume 37, Issue 5
Abstract
This paper presents the investigation results of a base-isolated RC frame-shear wall structure located in Luding County, Sichuan Province, China, which was damaged by a Ms 6.8 earthquake on September 5, 2022. This recently constructed school office building was about 9 km away from the epicenter. The isolation layer of this building consists of 54 rubber bearings and 12 viscous dampers. These viscous dampers or their connections failed during the earthquake, and the limit state included connection breaking or global buckling of the damper. Also, the superstructure suffered some minor damage. To investigate the cause of structural damages, a nonlinear time-history analysis is conducted using the ground motions recorded by four seismic stations close to the building. The onsite investigation and numerical simulation results revealed the possible reasons for the failure.
Get full access to this article
View all available purchase options and get full access to this article.
Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was funded by the National Natural Science Foundation of China (52278512), Chengdu Science and Technology Department (2019-GH02-00081-HZ), MOST Expert Program (DL2022164002L), and Natural Science Foundation of Sichuan Province (2022NSFSC1159, 2023NSFSC0883). Ground-motion data for this study are provided by Strong Motion Observation Center, Institute of Engineering Mechanics, China Earthquake Administration.
References
Bhandari, M., S. D. Bharti, M. K. Shrimali, and T. K. Datta. 2019. “Seismic fragility analysis of base-isolated building frames excited by near- and far-field earthquakes.” J. Perform. Constr. Facil. 33 (3): 04019029. https://doi.org/10.1061/(ASCE)CF.1943-5509.0001298.
CENC (China Earthquake Networks Center of the People’s Republic of China). 2022. “The M6.8 Luding earthquake in Sichuan.” Accessed September 5, 2022. https://news.ceic.ac.cn/CC20220905125218.html.
CSI (Computers and Structures, Inc.) 2017. CSI analysis reference manual for SAP2000, ETABS, and SAFE. Berkeley, CA: CSI.
Dai, K., Y. Yang, T. Li, Q. Ge, J. Wang, B. Wang, P. Chen, and Z. Huang. 2022. “Seismic analysis of a base-isolated reinforced concrete frame using high damping rubber bearings considering hardening characteristics and bidirectional coupling effect.” Structures 46 (Dec): 698–712. https://doi.org/10.1016/j.istruc.2022.10.111.
Dolce, M., D. Cardone, and F. C. Ponzo. 2007. “Shaking-table tests on reinforced concrete frames with different isolation systems.” Earthquake Eng. Struct. Dyn. 36 (5): 573–596. https://doi.org/10.1002/eqe.642.
Jangid, R. S. 2007. “Optimum lead-rubber isolation bearings for near-fault motions.” Eng. Struct. 29 (10): 2503–2513. https://doi.org/10.1016/j.engstruct.2006.12.010.
Kelly, J. M. 1999. “The role of damping in seismic isolation.” Earthquake Eng. Struct. Dyn. 28 (1): 3–20. https://doi.org/10.1002/(SICI)1096-9845(199901)28:1%3C3::AID-EQE801%3E3.0.CO;2-D.
Li, T., Y. Yang, J. Xu, K. Dai, Q. Ge, J. Wang, P. Chen, B. Wang, and Z. Huang. 2022. “Hysteretic behavior of high damping rubber bearings under multiaxial excitation.” Soil Dyn. Earthquake Eng. 163 (Dec): 107549. https://doi.org/10.1016/j.soildyn.2022.107549.
Losanno, D., H. A. Hadad, and G. Serino. 2017. “Seismic behavior of isolated bridges with additional damping under far-field and near fault ground motion.” Earthquake Struct. 13 (2): 119–130. https://doi.org/10.12989/eas.2017.13.2.119.
Losanno, D., M. Spizzuoco, and G. Serino. 2014. “Optimal design of the seismic protection system for isolated bridges.” Earthquakes Struct. 7 (6): 969–999. https://doi.org/10.12989/eas.2014.7.6.969.
Mazza, F., M. Mazza, and A. Vulcano. 2018. “Base-isolation systems for the seismic retrofitting of r.c. framed buildings with soft-storey subjected to near-fault earthquakes.” Soil Dyn. Earthquake Eng. 109 (Jun): 209–211. https://doi.org/10.1016/j.soildyn.2018.02.025.
MEM (Ministry of Emergency Management of the People’s Republic of China). 2022. “Intensity map of the M6.8 Luding earthquake in Sichuan.” Accessed October 2, 2022. https://www.mem.gov.cn/xw/yjglbgzdt/202209/t20220911_422190.shtml.
MOHURD-PRC (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2012. Load code for the design of building structures. [In Chinese.] GB 50009-2012. Beijing: MOHURD.
MOHURD-PRC (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2016. Code for seismic design of buildings. [In Chinese.] GB 50011-2010. Beijing: MOHURD.
MOHURD-PRC (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2021. Standard for seismic isolation design of building. [In Chinese.] GB/T 551408-2021. Beijing: MOHURD.
Murota, N., S. Suzuki, T. Mori, K. Wakishima, B. Sadan, C. Tuzun, F. Sutcu, and M. Erdik. 2021. “Performance of high-damping rubber bearings for seismic isolation of residential buildings in Turkey.” Soil Dyn. Earthquake Eng. 143 (Apr): 106620. https://doi.org/10.1016/j.soildyn.2021.106620.
Nagarajaiah, S., A. M. Reinhorn, and M. C. Constantinou. 1991. “Nonlinear dynamic analysis of 3D base-isolated structures.” J. Struct. Eng. 117 (7): 2035–2054. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:7(2035).
Narkhede, D. I., and R. Sinha. 2014. “Behavior of nonlinear fluid viscous dampers for control of shock vibrations.” J. Sound Vib. 333 (1): 80–98. https://doi.org/10.1016/j.jsv.2013.08.041.
Oh, S.-H., S.-H. Song, S.-H. Lee, and H.-J. Kim. 2013. “Experimental study of seismic performance of base-isolated frames with U-shaped hysteretic energy-dissipating devices.” Eng. Struct. 56 (Nov): 2014–2027. https://doi.org/10.1016/j.engstruct.2013.08.011.
Qu, Z., B.-J. Zhu, Y.-T. Cao, and H.-R. Fu. 2022. “Rapid report of seismic damage to buildings in the 2022 M6.8 Luding earthquake, China.” Earthquake Res. Adv. 3 (1): 100180. https://doi.org/10.1016/j.eqrea.2022.100180.
Ragni, L., D. Cardone, N. Conte, A. Dall’Asta, A. Di Cesare, A. Flora, G. Leccese, F. Micozzi, and C. Ponzo. 2018. “Modelling and seismic response analysis of italian code-conforming base-isolated buildings.” J. Earthquake Eng. 22 (Sup2): 198–230. https://doi.org/10.1080/13632469.2018.1527263.
Ryan, K. L., T. Okazaki, C. B. Coria, E. Sato, and T. Sasaki. 2018. “Response of hybrid isolation system during a shake table experiment of a full-scale isolated building.” Earthquake Eng. Struct. Dyn. 47 (11): 2214–2232. https://doi.org/10.1002/eqe.3065.
SAMR (State Administration for Market Regulation of the People’s Republic of China). 2020. The Chinese seismic intensity scale. [In Chinese.] GB/T 17742-2020. Beijing: SAMR.
Shahi, S. K., and J. W. Baker. 2014. “An efficient algorithm to identify strong-velocity pulses in multicomponent ground motions.” Bull. Seismol. Soc. Am. 104 (5): 2456–2466. https://doi.org/10.1785/0120130191.
Yoo, B., and Y.-H. Kim. 2002. “Study on effects of damping in laminated rubber bearings on seismic responses for a 1/8 scale isolated test structure.” Earthquake Eng. Struct. Dyn. 31 (10): 1777–1792. https://doi.org/10.1002/eqe.186.
Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 37 • Issue 5 • October 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jan 31, 2023
Accepted: Apr 19, 2023
Published online: Jun 21, 2023
Published in print: Oct 1, 2023
Discussion open until: Nov 21, 2023
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.