梁式高位转换层结构抗震性能分析与数值模拟

发布时间：2018-06-06 08:29

本文选题：梁式转换层 + 抗震性能　；参考：《石家庄铁道大学》2017年硕士论文

【摘要】：本文对梁式高位转换层结构的抗震性能进行了补充分析计算和拓展。文中以一个T字形截面的工程模型为例,分别把转换层位置依次设置在3、5、6、7层,共建立了4个有限元模型。结构层数均为17层。以下是论文所做的研究工作:(1)本文通过改变结构转换层所在位置对结构进行动力特性以及抗震性能分析。第一步对结构进行模态分析,对比各个模型的动力性能。第二步利用振型分解反应谱法对结构进行分析,以了解结构的抗震性能指标。例如,结构最大层间位移角、楼层最大位移值和楼层的剪力值。通过以上参数对比总结归纳转换层布置位置对结构抗震性能影响的差异性。(2)引入层间位移角比的抗侧概念并且介绍其优点。为工程设计人员判断结构抗侧性能提供一个易用简便的参数。通过改变转换层结构不同的设计参数,来对比发现层间位移角比与等效刚度比之间的规律并且通过总结给出在高位转换时关于层间位移角比取值系数的范围。(3)探究转换层楼板厚度与中梁刚度放大系数的关系。通过改变楼板厚度以及改变中梁刚度放大系数共建立了七个方案,探究其对结构抗震性能以及层间位移角比和等效刚度比的影响。(4)建立层间位移角比为0.81和1.0的两组模型,每组模型转换层位置分别为3、5、6、7层。通过对比在同一层间位移角比下转换层高度变化对结构抗震性能的影响和在转换层位置不变的前提下,层间位移角比提高对结构抗震性能的影响,归纳总结出层间位移角比在转换层结构的控制作用。(5)对转换层设置在6层的高位转换结构进行弹塑性动力和静力分析,对高位转换结构在罕遇地震下抗震性能给予评价。最后,分别对弹塑性动力和静力分析的结果给出相关建议和加强措施。
[Abstract]:In this paper, the seismic behavior of beam-type high-rise transfer story structure is analyzed and expanded. Taking an engineering model of T-shaped section as an example, four finite element models are established by setting the transfer layer position in turn at 3 ~ 5 ~ 6 ~ 6 ~ 7 stories. The number of layers is 17. The following is the research work done in this paper. (1) in this paper, the dynamic characteristics and seismic performance of the structure are analyzed by changing the position of the transfer story. The first step is modal analysis to compare the dynamic performance of each model. In the second step, the vibration mode decomposition response spectrum method is used to analyze the seismic performance of the structure. For example, the maximum interstory displacement angle, the floor maximum displacement value and the floor shear value. Through the comparison of the above parameters, the difference of the influence of the location of the transfer floor on the seismic performance of the structure is summarized. (2) the anti-lateral concept of the inter-story displacement angle ratio is introduced and its advantages are introduced. It provides an easy to use parameter for engineering designers to judge the anti-lateral performance of the structure. By changing the different design parameters of the transfer layer structure, The relationship between the thickness of the floor slab and the magnification factor of the stiffness of the middle beam is studied by summing up the range of the coefficient of the ratio of the displacement angle of the floor to the ratio of the equivalent stiffness to the ratio of the interstory displacement angle to the ratio of the equivalent stiffness. By changing floor thickness and stiffness magnification factor of middle beam, seven schemes are established, and the effects on seismic performance of structure, displacement angle ratio and equivalent stiffness ratio between floors are investigated. 4) two sets of models with displacement angle ratio of 0.81 and 1.0 are established. The position of the transition layer in each group of models was 3? 5? By comparing the influence of the change of the height of the transfer layer on the seismic performance of the structure under the same displacement angle ratio between the layers and the influence of the increase of the displacement angle ratio of the floor on the seismic performance of the structure under the premise of the invariant position of the transfer floor, The elastoplastic dynamic and static analysis of the transfer structure with six stories is carried out, and the seismic performance of the high-rise transfer structure under rare earthquake is evaluated by summing up the control effect of the inter-story displacement angle ratio on the transfer structure. Finally, some suggestions and strengthening measures are given for the results of elastoplastic dynamic analysis and static analysis respectively.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31

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