Elastic-Plastic Analysis of Partial Single Long-Span Complex Frame Structure under Rare Earthquake in High Seismic Intensity Zone

Abstract

The item 6.1.5 in Code for seismic design of buildings(GB50011-2010)[ is for single span frame structure design requirements of regulations. But there may be a partial single long-span frame structure in the actual project. Therefore, it is necessary to study the seismic performance of the structure under rare earthquake, especially in high intensity area. This paper takes a hybrid structure which is in high intensity zone with partial single long-span concrete structures (31m) and the single long-span steel roof as an example, and the seismic performance of partial single long-span structures under rare earthquake is discussed. In the elastic-plastic analysis, reinforcement results of members are automatically merged by VBA program. Material parameters of the Elastic-plastic analysis model are compared to Pseudo-static collapse experiment results of reinforced concrete frame columns and the overall framework in Tsinghua University. Results show that: The partial single long-span frame structure reasonably designed based on the Chinese code can meet the requirement of No Collapsing With Strong Earthquake; The bearing type of the steel roof has certain influence on the inter-story displacement angle of supporting frame structures under rare earthquake.