Preliminary analysis of seismic performance of a shear wall structure in Qinghai Maduo M7.4 earthquake

Abstract

In this paper, the measured acceleration of Dawu station of the M7.4 earthquake in Maduo County, Qinghai Province on May 22, 2021 and the acceleration at Yematan bridge simulated by our research group with the empirical Green's function method are selected. We compared the two seismic waves' absolute acceleration response spectrum with the "double parameter adjustment" design response spectrum given in the Seismic Ground Motion Parameter Zonation Map of China (GB18306—2015). The influence of the observed and simulated seismic wave on the local seismic fortification structure should depend on the structural form. Then, the two seismic waves are input to an eleven-story shear wall structure respectively. The SATWE module of PKPM is used to complete the elastic analysis under frequent earthquakes and fortified earthquakes, and the static elastic-plastic analysis under rare earthquakes is carried out based on the PUSH module. Under the action of different seismic waves in the two areas, the shear wall structure has reached the fortification goal of "no damage under small earthquake, repairable under medium earthquake and not falling under large earthquake". Those structure has a seismic performance target of grade C. The conclusion can provide an essential reference for seismic fortification and post-earthquake emergency response of buildings.

Keywords

• strong motion records
• qinghai maduo earthquake
• shear wall structure
• absolute acceleration response spectrum
• static elastic-plastic analysis