带转换层的大底盘双塔连体结构地震响应分析

发布时间：2018-01-15 11:26

本文关键词：带转换层的大底盘双塔连体结构地震响应分析　出处：《西南科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着科技的进步和时代的发展,高层建筑得到迅速发展。这种多元化的要求,设置不同的柱网或墙体在结构的竖向位置,因此需要在上部大空间下部小空间处的结构中设置转换层。转换层是整个建筑受力的关键部位,实际工程中,由于转换层的形式多种多样,处理时往往根据经验采用,然而不同形式的转换层对于结构的地震反应及整体抗震性能具有较大影响。本文以带转换层的大底盘双塔连体结构为研究对象,运用理论分析与数值模拟等研究方法,作如下主要研究。根据徐庆海硕士论文中所做的振动台试验模型及结果,用ETABS建立结构三维有限元分析模型进行数值模拟计算,将数值模拟计算的结果与试验结果进行对比,以对本文所用模型进行验证。调整结构转换层在大底盘双塔连体结构的竖向位置,并对所建立的结构模型进行抗震分析。对比不同转换层位置的结构周期和振型,结构的基底剪力,结构各层地震力,结构层间位移角和结构特殊部位的内力等方面的影响,并且提供相关结构设计参考。调整结构转换层的结构形式,建立六个不同形式的带转换层的大底盘双塔连体模型,六个模型分别是三个单层转换桁架模型和三个叠层转换桁架模型。对所建立的结构模型进行模态分析和弹性时程分析,选取较优的模型,使结构受力更合理,为相关结构设计提供参考。叠层交叉桁架转换模型(桁架由转换跨向相邻位置各延伸一跨)是本文带转换层的大底盘双塔楼连体结构选用的较好的桁架形式,且最好设置在三层或四层。
[Abstract]:With the progress of science and technology and the development of the times, high-rise buildings have been developed rapidly. Therefore, it is necessary to set up the transfer layer in the structure of the upper large space and the lower part of the small space. The transfer layer is the key part of the whole building. In the actual engineering, there are many forms of the transfer layer. Processing is often based on experience, but different forms of transfer layer have a greater impact on the seismic response and overall seismic performance of the structure. By using the methods of theoretical analysis and numerical simulation, the main research is as follows. According to the shaking table test model and results made in Xu Qinghai's thesis. The three-dimensional finite element analysis model of structure is built by ETABS and the numerical simulation results are compared with the experimental results. To verify the model used in this paper, adjust the vertical position of the structural transfer layer in the double tower connection structure with large chassis. The seismic analysis of the structural model is carried out. The period and mode of the structure, the base shear force of the structure, and the seismic force of each layer of the structure are compared. The influence of displacement angle between layers and internal force of special parts of the structure is also provided to provide reference for structural design and adjust the structural form of the transfer layer. Six different types of conjoined models of large chassis and double towers with transfer layer are established. The six models are three monolayer transfer truss models and three laminated transfer truss models. Modal analysis and elastic time history analysis are carried out to make the structure force more reasonable. The transfer model of laminated cross truss (one truss extending from the transfer span to the adjacent position) is a good truss form for the large chassis double tower contiguous structure with the transfer floor in this paper. And best set in three or four layers.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31

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