【摘要】 框架-核心筒结构由于诸多优点而在高层建筑中广泛应用,目前对此种结构体系的研究主要集中在单向地震作用方面,双向地震反应分析研究则较少。在此背景下,本文对材料本构关系、非线性模型建立以及地震波输入方法进行了阐述,并采用3条地震波(Kobe波、Taft波和人工波)对某24层框架-核心筒结构进行了动力时程分析,得到单向和双向地震作用下结构两个主轴方向的弹(塑)性层间位移角和楼层相对扭转角。通过分析不同角度输入时的顶层最大位移,发现结构弹性阶段的最不利加载角度为30°左右,而弹塑性阶段3条地震波的最不利加载角度分别为55°、30°和40°。更多还原

【Abstract】 Frame-core tube structures have been widely used in high-rise buildings because of many advantages,while current researches mainly focus on one-dimensional earthquake action and bidirectional seismic response analysis is less considered for this kind of structure system. The material constitutive relation,establishment of nonlinear model and seismic wave input method are described on this background,and the dynamic time history analysis of a 24 layer frame-core tube structure is carried out for using three seismic waves( Kobe wave,Taft wave and artificial wave). The elastic and elastoplastic story drift ratio and floor relative torsion angle under unidirectional and bidirectional seismic action are obtained. It is found that the most unfavorable loading angle is about 30° in elastic stage and 55°,30° and 40°are the most unfavorable loading angle for the three seismic waves in elastic-plastic stage through analyzing the top-story displacements with different earthquake input angle.更多还原