全装配式混凝土框架-钢支撑结构抗震性能分析

In order to improve the seismic performance and construction efficiency of the precast concrete frame structural, an all-precast concrete frame with steel braces (APCF-B) is proposed. It used hinged beam-column nodes and braces. Firstly, the steel brace, buckling restrained brace and self-centering brace models were established using the finite element software ETABS. The corresponding brace frame substructure models were also set up. Then the accuracy and rationality of the analysis model were proved through simulating experiments. On this basis, the 4-story and 12-story APCF-B structural models with the above three types of braces were designed. The seismic performance of the structure and the impact of different brace types on the structure were explored through static elastoplastic analysis and dynamic elastoplastic analysis. The results show that the APCF-B structure has a failure mode of "strong column, weak beam and weaker brace"; In the low-rise APCF-B structure, the use of three types of supports can ensure the collapse resistance of the structure under two seismic intensities; But in the high-rise APCF-B structure, it is recommended to use buckling restrained braces or self-centering braces to ensure the collapse resistance of the structure under extremely rare earthquakes.