Abstract：In order to study the seismic fragility of the connected structure with large span special-shaped steel corridor, a practical project was taken as the research object.Firstly, the damage measure and limit state of the frame-shear wall structure, rubber bearing and angel steel embedded parts were defined respectively based on the analytical model established by SAP2000.Then, the incremental dynamic analysis (IDA) were carried out under three-dimensional seismic excitation using 24 ground motion records selected according to the site conditions of the structure.Based on the IDA results, the seismic fragility curves were obtained with the maximum inter-story drift ratio, the shear strain and the damage factor as the structure demand parameters and peak ground acceleration as the intensity measure.The results of fragility analysis were also verified by the shaking table test.The research results show that under the rare intensity level of degree 8, the damage probability of main building, affiliated building I, rubber bearing and angel steel embedded parts are 0.8%, 0.3%, 0.0% and 47.7% respectively.The upper and lower bound of the damage probability for the overall structure was 48.4% and 47.7% respectively.Therefore, it is unsafe to use the seismic fragility of local structures to evaluate the seismic fragility of overall structure.The most vulnerable local structures of the connected structure are in turn the embedded parts, the main building, the affiliated building I and the rubber bearing.Therefore, it is suggested to strengthen the embedded structures so as to ensure its reliable connection.
潘毅 胡思远 赵崇锦 李晰. 基于试验的大跨异形钢连廊连体结构地震易损性分析[J]. 土木工程学报, 2020, 53(2): 12-22, 61.
Pan Yi Hu Siyuan Zhao Chongjin Li Xi. Test-based seismic fragility analysis of connected structure#br# with large span special-shaped steel corridor. 土木工程学报, 2020, 53(2): 12-22, 61.
