【作者】 邬敏；

【导师】 马福；

【作者基本信息】 太原理工大学 ， 结构工程， 2008， 硕士

【摘要】 在经济高速发展的今天,高层建筑也得到了迅猛的发展,高度越来越高,结构体系也越来越复杂。在高层建筑结构中由于使用功能的要求,结构下部几层需要大空间,从而导致结构竖向抗侧刚度有较大的变化,为此常设置转换层进行结构转换。这时底部落地剪力墙如何布置,剪力墙布置的不同导致转换层的上下的侧向刚度发生变化,如何控制这种变化,刚度变化对于结构抗震性能产生的影响,国内外目前的相关研究及工程实践经验尚不充分,因此成为结构设计的重点与难点。本文以具有高位转换和多塔楼等特点的复杂高层建筑结构工程实例为背景,利用国内外著名工程分析软件PKPM中的SATWE模块及ANSYS对钢筋混凝土大底盘带转换层双塔结构进行了系统的分析研究。分析由于结构底部剪力墙布置的不同导致转换层上下刚度比发生变化,进而对复杂高层建筑结构地震反应的影响,比较不同方案的优缺点,给出该工程结构设计的具体建议,并总结出所研究问题的一般规律和结论。通过对一实际带转换梁的框支剪力墙结构进行整体分析,表明:框支剪力墙结构是抗震不利的结构体系,但通过合理选择落地剪力墙数量,控制和转换层上下的刚度,也可以获得较好的动力特性。根据局部构件的有限元分析结果,转换层附近框支柱变形较大而集中,主应力也出现非常明显的集中,是抗震薄弱环节。设计中应当对转换层及其附近区域加强。有限元分析表明,转换梁下方框支柱有较大轴向力存在,设计中不容忽视。更多还原

【Abstract】 In today’s high-speed economic development, tall buildings have also been rapid development, the height of the structure is more and more high, and the system of the structure is more complex.In the use of functional requirements, the lower layers of the building need large space, resulting in the lateral stiffness of the vertical structure a larger change. So people often set up the transfer story as structural transformation.How to set the shear walls, control the stiffness of the upper and lower lateral stiffness of the transfer story, the influence of seismic response on the stiffness change of the structural , are the focus of structural design . The relative research and practical experiences are not sufficient and that is the object of this thesis.In this Paper, taking complex tall building with high position transfer story and mutli-towers as a example, using domestic and foreign famous engineering analysis program pkpm and ansys, carry on systematic research. The influences of the different upper and down stiffness on seismic response of complicated tall buildings are investigated, the advantages and disadvantages of each layout are compared, some suggestions to the building are given and some general rules and conclusions are summarized.The analysis of a reality shear wall structure with transfer beam indicates that shear wall structure with supporting frame is a disadvantageous structure system to seismic action. But if the amount of the shear wall is under reasonable choice and the up and down stiffness of the transfer story is under well control, it can show good dynamic characteristics.The results of the analysis of finite element method indicate that the supporting column nearby transfer story is an unsubstantial position to seismic because of its serious concentrations of deformation and major principle stress.The transfer story and nearby area should be strengthened in principle design.The analysis results of finite element method also show that the biggish axial force presence in the supporting column could not be neglected in design.更多还原