Seismic Elas-to-plastic Time-history Analysis Of Single-story Double-span Steel Structure Of Lightweight Building With Gabled Frames

In recent years, the steel structure of lightweight building with gabled frames has been used widely in China. The span and the height of the structure become more and more large, while the seismic behaviors analysis of the structure is seldom. The relative standards of seismic design on steel structure of lightweight building with gabled frames have some deficiency. Therefore, it is necessary to deeply research on the seismic behaviors of the steel structure of lightweight building with gabled frames.In this paper, taking the single-story double-span steel structure of lightweight building with gabled frames as the research object, and the ANSYS finite element analysis software is used to seismic elas-to-plastic time-history analysis of these structures. Firstly, through the results contrast between shaking table test and finite element analysis, which verify the correctness of finite element model. Secondly, according to the regulations of "Code for Seismic Design of Buildings" (GB50011-2001) choose two strong ground motion records of El Centro earthquake, Taft earthquake and one artificial earthquake, which are used to seismic elas-to-plastic time-history analysis of five kinds of different spans single-story double-span steel structure of lightweight building with gabled frames that are choosed from "Standard Design Drawings for Multi-span Steel Structure of Lightweight Building with Gabled Frames (without crane)" (07SG518-4). Finally, it's to verify the time-history analysis results whether to satisfy the code requirements by base shear method. Through seismic responses analysis of column cap and ridge as well as Von Mises stress analysis research the mechanical behaviors, deformation features and failure mechanisms of the single-story double-span gabled frames in different seismic fortification stages under the lateral earthquake action. The analysis results show that all of the calculated single-story double-span steel structure of lightweight building with gabled frames can satisfy the seismic fortification demand of "no damage under frequent earthquake, repairable under middle earthquake, and no collapse under strong earthquake".