【摘要】 为了改善某未按图施工的平面不规则钢框架结构房屋的抗震性能,采用局部增设钢支撑对其进行抗震加固.利用SAP2000软件建立空间模型,对该钢框架结构按现状及加固后两种工况进行动力时程分析,探究其在各种地震工况作用下的抗震性能,研究结构的顶层位移反应、层间位移分布和基底剪力分布的影响.分析表明,优化后的加固方案使结构体系抗震变形得到控制,扭转效应明显减少,为类似工程的抗震加固提供了参考.更多还原

【Abstract】 In order to improve the anti-seismic performance of a building with plane abnormity steel frame structure which was not constructed according to the design drawing,the anti-seismic strengthening for the building was carried out with locally adding the steel support.The SAP2000 software was used to establish a spatial model,and then the dynamic time-history analysis for the steel frame structure under both existing and strengthed conditions was performed.In addition,the anti-seismic performance of the structure under various seismic conditions was investigated,and the influence concerning the displacement response of top floor,displacement distribution between floors and shear force distribution of base for the structure was studied.The analysis results show that the anti-seismic deformation of the structure system can be controlled by the optimized strenthening scheme,the torsion effect decreases evidently.And the strengthening scheme can provide the references for the anti-seismic strengthening in similar engineering.更多还原