Seismic Response Analysis Of Long-Span Spatial Structures Under Muti-Support And Multi-dimentional Earthquake Excitations

With the development of technology, large span reticulated shell is a widely used, seismic analysis of large-span structures are increasingly concerned about. With the gradually increasing span, there is a difference between the actual response and the role of one-dimensional single point under earthquake. In recent years, multi-dimensional multi-span structural analysis has also been a lot of emphasis on academics. In this paper, Multi-dimensional multi-span structural analysis is done on an actual space reticulated shell through modeling, the main tasks include the following aspects:1、In order to prepare for the following research, the vibration characteristics, stiffness and the main vibration form of the structure on the basis of structural modeling and vibration characteristics analysis are obtained.2、The response of the structure under one-dimensional and three-dimensional seismic action is comparatively analyzed comparative analysis of the displacement and internal force using the response spectrum function which is selected according to the site conditions, seismic fortification level etc.3、After comparative analysis of the structure response under single point consistency effect and multi point non consistency effect, a proper seismic wave is inputted to the structure through single-point method and multi-point method, meanwhile some adjustments are made according to the national standards, the last the structural deformation and internal force response are comparatively analyzed4、The structural deformation and internal force response are comparatively analyzed under three different apparent wave velocity.