【摘要】 钢筋混凝土核心筒作为高层建筑结构体系抗震设计的关键构件,为研究其抗震性能,本文应用ABAQUS非线性有限元分析软件,对核心筒进行模拟。在利用大比例试件的试验结果对该有限元模型验证的基础上,对具有不同构造条件的钢筋混凝土核心筒进行了水平受力性能的分析研究,所考虑的影响因素有:洞口大小、混凝土强度、连梁跨高比,以及采用双连梁的改进措施。研究表明,混凝土强度对核心筒的性能影响显著;洞口大小对连梁和墙肢的破坏特征有较大影响;采用双连梁构造能明显改善筒体的延性而承载力降低很少,因而是改善筒体抗震性能的一项可行措施。更多还原

【Abstract】 The reinforced concrete core wall is the key element in high-rise buildings for seismic design.In order to study the seismic performance of core walls,this paper deals with finite element(FE)analysis of the concrete core wall under lateral loading.The FE model,using the software ABAQUS,is proposed to carried out the nonlinear analysis and is verified by comparing the computational results with the corresponding experimental ones obtained from laboratory tests of large-scale specimens.On this basis,a series of reinforced concrete core walls with different parameters are simulated and analyzed under lateral loading,which include their opening sizes,concrete strengths and span-height ratios of coupling beams.The core wall with double coupling beams is also studied and compared with that with single coupling beams.The results show that concrete strengths have a significant effect on the performance of core walls;opening sizes play an important role in the failure of coupling beams and wall piers;with the use of double coupling beams,the ductility of core walls is significantly improved while their load-carrying capacity is just slightly reduced,so it is a feasible measure improving the seismic performance of concrete core walls.更多还原