带水平加强层的高层框架——核心筒结构push-over分析

水平加强层作为提高结构抗侧刚度、降低框架-核心筒结构剪力滞后效应的有效手段,近年来得到了广泛的应用。但带水平加强层的高层筒体结构在地震作用下表现出非常复杂的反应特性,为了定量地分析水平加强层对高层框架-核心筒结构抗震性能的影响,利用模拟框架支撑结构替代剪力墙,采用杆系空间协同模型,选取典型框架-核心筒高层建筑进行了3种加强层不同设置方案的Pushover分析,较为系统地研究了框架-筒体结构与带加强层的框架-筒体结构在地震作用下的屈服机制和延性性能。为高层框架-核心筒结构设计提供了相关建议。

PUSH-OVER ANALYSIS OF THE HIGH-RISE FRAME-CORE WALL STRUCTURES WITH STRENGTHENED STOREYS

Horizontal Strengthened stories can effectively reduce the lateral displacement of the high-rise tubular structures under lateral load.But the high-rise tubular structures with horizontal strengthened stories displayed the extremely complex response characteristic under the earthquake action.The static elastic-plastic analysis(push-over analysis) of various structures is presented with horizontal strengthened stories,the plastic yield mechanism and ductility performance of these structures under earthquake action have been discussed in this paper.It is pointed out that weak stories will be formed nearby the horizontal strengthened stories.Corresponding design measures to ensure the deformability of the structures under rare earthquake action are put forward.