Experimental study on the seismic response of braced reinforced concrete frame with irregular columns

作     者：Xiao Jianzhuang Li Jie Chen Jun 

作者机构：Department of Building Engineering Tongji University Shanghai 200092 China State Key Laboratory for Disaster Reduction in Civil Eng. Tongji University Shanghai 200092 China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2011年第10卷第4期

页      面：487-494页

核心收录：

学科分类：07[理学] 081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：Council for Building Technology and Development in Shanghai 

主　　题：seismic response reinforced concrete braced frame irregular columns 

摘      要：A 15-storey K-braced reinforced concrete model frame with irregular columns, i.e., T-shaped, L-shaped, as well as ＋-shaped columns, was constructed and tested on the six-degree-of-freedom shaking table at the State Key Laboratory for Disaster Reduction in Civil Engineering in Tongji, China. Two types of earthquake records, El-Centro wave （south-north direction） and Shanghai artificial wave （SHAW） with various peak accelerations and principal-secondary sequences, were input and experimentally studied. Based on the shaking table tests and theoretical analysis, several observations can be made. The failure sequence of the model structure is brace→beam→column→joints, so that the design philosophy for several lines of defense has been achieved. Earthquake waves with different spectrums not only influence the magnitude and distribution of the earthquake force and the storey shear force, but also obviously affect the magnitude of the displacement response. The aftershock seismic response of previously damaged reinforced concrete braced frames with irregular columns possesses the equivalent elastic performance characteristic. Generally speaking, from the aspects of failure features and drift ratio, this type of reinforced concrete structure provides adequate earthquake resistance and can be promoted for use in China.