Seismic Response Analysis of Large Span Steel Structures Based on FEM

Abstract

The large span space steel plant structures are more and more complicated. The seismic response analyses of large steel structure plant are important and significant to improve the security and stability of the structure under earthquake action. Based on FEM(Finite Element Method), a 3D finite element model of a long span steel plant in Tianjin city is established, and the seismic time history analysis is calculated. The ground motion is considered, and two seismic waves are selected representative to analyze the structure. The top side of building structure under earthquake displacement and internal force at the bottom of the column response are obtained. The results show that the different types of seismic wave acceleration are of great amplitude difference and the seismic response results are not the same. The local components of structure are affected by the earthquake obviously and the stability of the structure must be enhanced to ensure the safety of the structure.