【作者】 刘曦；

【导师】 韩太昌；

【作者基本信息】 西南交通大学 ， 结构工程， 2012， 硕士

【摘要】 随着经济的发展和工程技术的不断进步,人们对建筑功能及美观的要求也在不断提高,因此高层建筑也出现了新颖复杂的结构形式,甚至出现竖向或平面比较特殊的结构,例如带转换层的结构、带加强层的结构、错层结构、连体结构、多塔结构。这些复杂结构竖向布置不规则,同时也可能存在平面布置不规则或传力路径复杂等问题。随着结构形式的不断发展,高层混合结构以它独特的优势展现在世人的面前。在顺应时代发展要求的过程中,为了更好地提高外围框架与内部核心筒的整体作用,带加强层的钢框架核心筒结构运用也越来越广泛,同时其优缺点也十分明显,所以对这种复杂结构进行抗震性能分析对其概念设计及工程实际提出一些有意义的建议。本文所做的主要工作：一、建立模型：运用有限元软件SAP2000对钢框架核心筒结构进行模态分析,讨论加强层数量、位置及节点连接刚度变化时结构自振周期的变化规律,并归纳了特征向量法与Ritz向量法的区别,在此基础上提出了加强层设置数量及位置的优化选择。二、对带加强层钢框架-核心筒结构模型进行反应谱分析：总结了在地震作用下加强层对结构侧向位移外框架柱剪力和轴力的影响规律。加强层引起外围框架柱的剪力及轴力突变,工程设计时需要谨慎对待。三、对结构模型进行了线性时程分析：对比三种地震波作用下的结构水平加速度、顶点位移最大值与加强层设置的关系,并对比了在反应谱法与时程分析法分析时的角柱剪力的区别。更多还原

【Abstract】 With economic development and engineering technology advances, the requirements on the building function and aesthetic requirements are also rising,so there have been new high-rise buildings of the complex structure, or even vertical plane rather special structure, such as structure with conversion layer, strengthen storys and plit-level structure, piece structure, the structure of multi-tower structure has emerged, not only irregular vertical arrangement of these complex structures, but also appear irregular or special irregular on project layout arrangement, the complex path of force transmission. With the continuous development of structure, the high-rise mixed structure with its unique advantages show in front of the world. In the course of the development requirements of the times, in order to improve the overall effect on external framework and internal core tube framework, with strengthen storys of the core tube steel frame structure is used more widely. At the same time its also has very obvious advantages and disadvantages, so analysis of the concept of seismic performance of complex structures design and make some meaningful recommendations of engineering practice.The major work of this article:Firstly, useing finite element modeling software SAP2000to establish the core tube steel frame model and make modal analysis, Discussed the location and the joint number changes of strengthening layer and summarizes the difference between eigenvector method and the Ritz vector method, on this basis,put forward best choice of the number and location on strengthening the layer settings. Sencondly,make the response spectrum analysis of strengthening layer on the steel frame-core tube structure model, summarizes the impact of structure lateral displacement, shear of frame column, axial force by the strengthening layer under earthquake, Strengthening layer caused peripheral frame column shear and axial force mutation, engineering design should be cautious. Thirdly, make a linear time history analysis of structural model, Analysis and comparison the structure of the horizontal acceleration and strengthening the relationship between the level set under the four kinds of seismic waves, analysis the changes of joint under the connection stiffness of the structure peak horizontal acceleration, make relevant recommendations of the enhanced level of seismic core tube steel frame design.更多还原