Probability analysis of seismic failure modes of RC rectangular columns
MA Ying1,2, CHENG Xuebin1, L Ruihan3, XU Xinyong1, ZHANG Jianwei1
1.School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China;
2.Key Laboratory of Building Collapse Mechanism and Disaster Prevention， China Earthquake Administration, Sanhe 065201, China;
3.Beijing Survey, Design and Research Institute Co., Ltd., China Power Construction Group, Beijing 100024, China
Abstract：In view of the importance of the failure mode in the seismic behavior evaluation and post-earthquake recovery strategies of existing reinforced concrete (RC) columns, the quasi-static test data of rectangular 214 RC columns were collected from PEER column database. The characteristics of three failure modes, i.e., flexure, flexure-shear, or shear failure, and influencing factors were analyzed. Based on the relationship between shear demand and shear capacity at the plastic-hinge region section of RC columns, the ratio of shear demand-to-strength of the three failure modes were calculated and their probability distribution functions are proposed respectively. The results show that the probability distribution based on shear demand-to-strength ratio could reasonably reflect the seismic failure modes of RC columns.
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