Comparative study on seismic collapse resistance criteria of RC shear#br#
wall structures based on component deformation
Han Xiaolei1,2 Zhuang Chaolu1 Ji Jing1,2 Qin Ligen1 Wang Songfan3
1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China;
2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China;
3. Guangzhou Design Institute, Guangzhou 510620, China
Abstract： In order to determine a collapse resistance criterion which can truly reflect the collapse state of a reinforced concrete (RC) shear wall structure, this paper selects four representative collapse resistance criteria (the elastoplastic inter-story drift ratio criterion, the first vertical component failure criterion, the material strain criterion and the side-sway collapse mechanism criterion) from the material, component and structural levels for comparative analysis. Under the assumption of not considering the torsional effect, the damage degree of the shear wall is measured by the limit value of component deformation. The collapse fragility analysis based on incremental dynamic analysis (IDA)is used to evaluate 11 typical RC shear wall structures (considering the influence of different fortification intensities, site periods and structural height). Comparative study is conducted on different criteria on the degree of control stringency, the probability of collapse, the variation of collapse margin ratio (CMR) with changing the structural parameters and the actual performance levels of shear walls. The results show that the first vertical component failure criterion can determine the critical state of collapse of a RC shear wall structure with a suitable degree of control stringency.
