【作者】 徐文华；

【导师】 郑毅敏；

【作者基本信息】 同济大学 ， 结构工程， 2007， 硕士

【摘要】 近年来，随着工程技术的发展，高层建筑形式日趋多样化。连体建筑由于其宏伟的气势，现代化的气息而被建筑师们所喜爱。连体建筑是指由设置在一定高度处连接体(如高空连廊)相连接的两个或多个建筑单体组成的建筑集群。由于连体的存在，使得原来彼此独立的各单体结构成为一个复杂结构系统中的一部分。这就给高层结构的分析和设计提出了更高的要求。如何高效、准确地对复杂高层多塔楼连体结构体系进行分析和设计，并在此基础上评价多塔楼连体结构的抗震性能，已成为一个急待解决的重要课题。 本文的第一章和第二章叙述了复杂高层多塔楼连体结构的设计和研究现状。介绍了静力分析基本理论，重点讨论了基于壳元理论的三维组合有限元分析方法，并且介绍了目前主要的几种高层结构的分析软件。 第三章分析了本工程大跨度高空连廊的结构特点。对其进行了弹性阶段的静力分析，通过三种不同的桁架模型计算比较，分析各模型对结构刚度、构件受力、扭转效应的影响。比较分析塔楼与连廊连接连接形式，选取适合工程实际的连接支座。此外，通过对塔楼进行罕遇地震作用下的静力弹塑性分析确定连廊搁置层塔楼的最大位移。 第四章对连廊进行竖向荷载下的极限承载能力的分析。考虑楼板水平刚度的影响，分析了连廊结构的极限承载力。比较分析三种桁架形式的极限承载能力，确定连廊的结构形式。 第五章通过对三塔楼两连廊整体模型的动力时程分析，研究多塔楼连体结构连接支座在罕遇地震作用下的的非线性动力特性，分析支座水平刚度和屈服力对支座变形和水平力的影响，比较支座的耗能性能，最终确定支座的最优水平刚度和最优屈服力参数。 第六章重点阐述多塔连体结构整体分析，从静力和动力两个方面计算比较了连廊单独建模和多塔连体结构整体建模之间的差异，得出连体结构协同工作的规律。 最后，本文在上述分析的基础上得出了一系列针对本工程的结论以及一些针对多塔楼连体结构体系的具有一定普遍意义的结论。这些结论对本工程的设计具有指导意义。更多还原

【Abstract】 In last decades, with the development of the engineering technology, the types of tall buildings become more and more diversified. Because of their large scale and modern style, the connected buildings are preferred by many architects. The connected buildings refer to one group of buildings connected by one or more skybridges setting between two or more buildings at certain elevation. Through the skybridges, the originally separated structures become one part of the whole structure. This has made the structural design a more challenging task than ever. How to efficiently and exactly analyze and design the skybridge-connected buildings and how to evaluate the anti-seismic capacity of the skybridge-connected buildings has been an important and emergent research topic.The first and second chapters address the state of the art of the design and research of the skybridge-connected buildings and the basic theories of the related static analysis. The discussion focuses on the three-dimensional finite element analysis method. The most popular analysis software is also discussed.The third chapter analyzes the structural characteristics of the long-span skybridge-connected tall buildings project, which is the engineering background of this thesis. Elastic static analysis was carried out for the project. Three different truss models were created to discuss the influence of structural stiffness, member force and torsional effects. Different types of the connecting support, which is used to connect the skybridges and the main towers, were analyzed. The static elastoplastic analysis was also conducted for the main towers to determine the maximum possible deformation of the tower under earthquake attack. The deformation is then used to determine the maximum movement of the connecting support.The fourth chapter analyses the ultimate load-bearing capacity of the skybridge under vertical loading. The load-bearing capacity calculation brings the horizontal effect of the skybridge deck into consideration. The ultimate load-bearing capacities of the three models are compared and the structural pattern of the skybridge is determined based on the comparison.更多还原