Rapid report of seismic damage to buildings in the 2022 M 6.8 Luding earthquake,China  

作　　者：Zhe Qu Baijie Zhu Yuteng Cao Haoran Fu 

机构地区：[1]Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,No.1 Chaobai Street,Yanjiao,Sanhe,Hebei,065201,China [2]Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,China

出　　处：《Earthquake Research Advances》2023年第1期11-30,共20页地震研究进展（英文）

基　　金：the Natural Science Foundation of China(52122811).

摘　　要：The report summarizes the observed damage to a variety of buildings near the epicenter of the M6.8 Luding earthquake in Sichuan Province,China.They include base-isolated buildings,multi-story reinforced concrete(RC)frame buildings,and masonry buildings.The near-field region is known to be tectonically highly active,and the local intensity level is the highest,that is,0.4g peak ground acceleration(PGA)for the design basis earthquake,in the Chinese zonation of seismic ground motion parameters.The extent of damage ranged from the weak-story collapse that claimed lives to the extensive nonstructural damage that suspended occupancy.The report highlights the first observation of the destruction of rubber bearings and viscous dampers in the isolation layer of Chinese seismically isolated buildings.It also features the rare observation of the brittle shear failure of RC columns in moment-resisting frames in a region of such a high seismic design requirement.Possible reasons that may have attributed to the reported damage are suggested by providing facts observed in the field.However,careful forensic analyses are needed before any conclusive judgment can be made.

关 键 词：Base isolation Rubber bearing Viscous damper Reinforced concrete frame Masonry structure Weak-story collapse Near-fault area Terrace riser Nonstructural element 

分 类 号：P315.9[天文地球—地震学] TU746[天文地球—固体地球物理学]