Last modified: 2021-06-10
Abstract
This study deals with spatial truss structures composed of a double layer spatial truss dome and two truss plate-type wall substructures subjected to horizontal earthquake motion. Comparative investigations of the structures are also carried out by considering the structural eccentricity varying the wall height. The equivalent static seismic force, which is hereinafter referred to as the static seismic force, is calculated by the response spectrum method, and the seismic force distribution and response deformation applied on the structure are analyzed and investigated. The elastic seismic response analysis using static seismic force and the influence of eccentricity on seismic response characteristics is carried out. In addition, a method to calculate the static seismic force of medium and medium-sized large-span double-layer truss dome is also proposed by considering the shape, height, span and support conditions of the structure.
The purpose of this study is to investigate an effect of the substructure on the seismic static force because the roof truss structure with curved surface has higher stiffness. In addition, the seismic response characteristics of long-span structures are different from those of multi-story structures, which have the structural characteristics of its vertical response as well as horizontal response to horizontal earthquake motion. Based on the elastic seismic response analysis and the static analysis of the static seismic force calculated by the response spectrum method, the seismic force distribution and deformation characteristics of the analysis model with or without eccentricity are analyzed and discussed. It is seen that the static equivalent modeling with the maximum effective mass ratio can be used to obtain the seismic force distribution in this kind of long-span structure.