规则框架结构Push-over方法的改进研究  

Research on the Improvement for the Push-over Analysis of Regular Frame Structures

作　　者：张波[1] 王赟[1] 曾奔[2] 

机构地区：[1]陕西理工学院土木工程与建筑学院,陕西汉中723001 [2]广州市城市规划勘测设计研究院,广东广州510000

出　　处：《建筑科学》2013年第9期53-56,94,共5页Building Science

基　　金：陕西理工学院科研基金项目(SLG0811)

摘　　要：针对Push-over分析方法的特点,对等效单自由度提出了一种新的等效方法。主要假设施加于框架结构上的侧向分布荷载是动力荷载,因此可用等效侧向荷载代替动力平衡方程中的地震作用,直接利用基底剪力一顶点位移曲线,避免了一般等效方法中的转换过程;同时利用强度折减系数对弹性加速度反应谱进行折减,根据等效周期求出相应目标位移,避免了复杂的迭代过程;最后用该方法对一框架进行了分析计算。结果表明:该方法简单实用,对结构计算分析具有一定的参考价值。A new equivalent non-liner single-degree-of-freedom system is proposed. The main assumption of this paper is that the masses of the frame are loaded with lateral external dynamic forces so that the equivalent dynamic forces can substitute the seismic demand. Thus the curve of base shear forces-top displacement diagram can be used directly and the conversion of the common equivalent method can be avoided; Besides, the iteration is avoided by reducing the elastic spectrum through the strength reduction factor and calculating the target displacement according to the equivalent period. Finally, this method is verified by a six-story regular frame system. The results show that, this method is simple and practical, and it has certain reference significances for structure analysis.

关 键 词：Push—over 目标位移 等效单自由度 

分 类 号：TU375.4[建筑科学—结构工程]