Box Support Staggered Truss Structure Earthquake Response Analysis

By function of transfer floor, Framework supporting-staggered truss system combines framework supporting bottom with upper staggered truss system to put into great play. Bottom can content open office,and upper structure can be used as offices and hotels. So this system gets with development of multi-function and multi-purpose of modern structures.In this paper, framework supporting-staggered truss system is builded by using Midas/Gen engineering software. Based on the analysis of shear wall of level number, floor height and longitudinal bracing, there is researching the effect of anti-seismic performance of staggered truss system. In this paper, main contents are as following.(1) In terms of codes of china, six calculation examples of framework supporting-staggered truss system are designed in which variations of shear wall of level number, floor height and longitudinal bracing are considered.(2) According to code for seismic design of buildings,checking lateral stiffness ratio and floor tower fx vx calculations researching structural horizontal seismic actions using mode-superposition response spectrum method, then comparing displacement and mode of vibration cycle of comparison model,the conclusions reached by these analysis are as following. The effect of shear wall of level number on the displacement can be ignored; Displacements are increasing as the shear wall of floor height increasing; Longitudinal bracing strengthens stiffness of staggered truss floor and avoids appearing weak story nearby the transfer floor(3) On the basis of characteristic of construction site, framework-staggered truss system is analysed elastic-plastic time-history analysis with selecting two natural seismic wave and one simulated earthquake wave. By contrasting displacement ratios of several models and time history curve of the top floor displacement, time of appearing peak value of top floor displacement and displacement peak value are obtained.