摘要
近年来,静力弹塑性分析方法得到了深入的研究和广泛的应用。为了使静力弹塑性分析Pushover方法的计算过程更简单,更适用于工程实际,本文在改进的适应谱Pushover方法(简称IASPA法)的基础上,用模态Pushover方法(简称MPA法)的侧向力分布替换IASPA法中的侧向荷载,并对两个不同高度的框架结构分别采用固定加载模式和两阶段加载的MPA法计算,对比分析框架结构的振动变化特性。计算结果表明,对于高层结构,本文的两阶段加载方法在估算结构需求特别是顶层位移方面,更接近于动力时程分析结果,有很好的精度,而对于多层结构,两阶段加载的MPA法分析也可以作为参考。
In recent years,nonlinear static pushover analysis method is widely used in engineering structures.In this paper,the lateral loading mode in IASPA method is replaced by the one in MPA procedure in order to simply the computation.Taking into account of structural changes in vibration characteristics after yielding,the MPA loading mode is divided into two stages.And two frames with different heights are analyzed using both one-stage and two-stage MPA procedure.The results show that two-stage MPA procedure has better accuracy in the analysis of tall building,and it can also be used in Multi-storey structures as a reference.
出处
《安徽建筑工业学院学报（自然科学版）》
2010年第6期80-84,共5页
Journal of Anhui Institute of Architecture(Natural Science)
关键词
MPA法
结构屈服
两阶段加载
modal pushover analysis
structural yielding
two-stage load
