轻钢结构住宅支撑体系抗震性能研究

目的为了分析轻钢结构支撑体系对结构在不同地震烈度和场地土条件下的抗震性能影响，并通过布置不同形式的支撑以提高结构的抗侧移刚度．方法利用同济大学MTS多高层设计软件，采用楼盘平面布置中的一个单元，建立H型钢框架支撑体系模型，计算出结构的最大层间位移和上部结构的平均用钢量．结果在7度第1、2、3、4类场地土条件及8度1、2类场地土下适合布置柱间中心支撑以提高结构的抗侧移刚度控制结构的侧向变形；8度3、4类场地土条件下不适合布置中心支撑宜采用偏心结构支撑以提高结构的耗能吸能能力．结论在多层住宅应布置支撑以提高结构的抗侧移刚度，并当横梁刚度不大时支撑采用十字交叉支撑，当刚度很大时,宜采用人字型支撑．

Seismic Research of Braced Frame of Light Weight Steel Structure

In order to analyze seismic ability of braced frame of light weight steel structure at the different seismic design intensity and promote lateral displacement resistance rigid through different braces disposition.This paper sets up an H style steel frame by computing software named MTS which invents by Tongji University,at the base of adopting a popular building,then derive the biggest lateral displacement and the total volume of upper structure.Through these documents the fitter braced disposition are advised.At the seventh seismic design intensity and the first and second space condition of eighth seismic intensity,central brace are devised.The third and fourth space condition of eighth seismic intensity,the fitter structure is eccentric brace.At last,a conclusion is derived:it should adopt braces in the stories structure,and when the volume of beam rigidity is not large,crossing braces are proposed,and when the volume of beam rigidity is large,another style braces are proposed.