框-剪结构细长连梁刚度折减非线性分析验证

算例1、2为8度区(0.2g)16层框架-剪力墙结分别按细长(跨高比为3.6)洞口连梁刚度折减和刚度不折减的方案进行结构设计,然后用拟三维非线性动力反应分析程序TS-EPA对该两算例进行动力分析,由分析结果得出以下结论:框架-剪力墙中的洞口连梁首先进入屈服后状态,表明洞口连梁是框架-剪力墙结构的第一线抗震构件;从各结构的罕遇地震作用下的反应和洞口连梁的延性需求来看,对洞口连梁进行刚度折减会给框架-剪力墙结构的动力反应带来少许不利影响。

Calibration of Nonlinear Dynamical Analysis for RC Frame-wall Structure with Slender Coupling Beams Considering Stiffness Reduction

Two 16-storey frame-wall structures with slender coupling beams in regions of Intensity 8(0.2 g),with and without considering the stiffness reduction of the coupling beams,were designed.Nonlinear dynamic response analyses of two typical frame-wall structures subjected to several ground motions were carried out.The analyses were based on the quasi-tridimensional program for nonlinear dynamic response analysis TS-EPA.The analyses led to the following conclusions: Under rare earthquake actions,the coupling beams in framewall structures yield first.This shows that the coupling beam in frame-wall structures is the member at the forefront of earthquake resistance.Comparison of the analytic results of two couples with and without considering the stiffness reduction of the coupling beam found that,in view of the dynamic response to and the requirement for ductility under rare earthquake motions,reducing stiffness causes a minor unfavorable influence on the dynamic response of frame-wall structures.