复杂高层梁式转换层结构的受力性能研究

发布时间：2018-01-20 09:51

本文关键词： 梁式转换层受力性能动力时程分析 SATWE　出处：《西安科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的不断发展,城镇化步伐不断加快,越来越多的人进入城市生活,城市中高层建筑的数量也越来越多。为了满足建筑的多功能和结构体系的多元化,高层建筑梁式转换层结构得到了广泛应用。而在现有的转换层结构设计方法中,大多数是是针对形式单一、受力相对简单的转换层,对于形式多样、受力较为复杂的转换层结构可遵循的设计思想、原则和设计方法较少,使得设计人员在实际工程中对结构选型、截面尺寸、计算模型和方法的确定等各方面问题上很难把握。因此,对转换层结构的受力性能、设计计算方法以及构造处理等进行深入研究,有着重大意义。本文利用SATWE结构空间有限元分析设计软件,以一带梁式转换层的实际工程结构为背景,对其受力性能进行研究。应用高层建筑有限元分析方法及动力分析相关理论,通过对结构改变转换层位置和转换层上、下结构刚度比,分析了结构在竖向静力荷载、风荷载和地震作用下的反应规律。并通过弹性动力时程分析,对比时程分析和反应谱分析结果,得到了转换层位置和转换层上下结构刚度比改变对结构抗震性能的影响。分析得出,转换层位置越高,竖向静力荷载作用下结构的楼层水平位移越小,风荷载作用下结构的楼层水平位移越大,最大层间位移角突变越剧烈,地震作用下的结构自振周期越大,楼层位移增大,层间位移角突变加剧,楼层剪力和弯矩增大。转换层与其相邻上层结构的等效剪切刚度比越大,风荷载作用下结构的楼层水平位移越小,地震作用下结构自振周期变小,楼层位移减小,最大层间位移角越小,楼层剪力和弯矩相比增大。本文旨在通过对一梁式转换层结构的受力性能研究,深入认识和了解这种结构,为今后的研究和实际设计工作提供相关参考。
[Abstract]:With the continuous development of our economy, the pace of urbanization continues to accelerate, more and more people into the city life. The number of high-rise buildings in the city is also increasing. In order to meet the multi-function of the building and the diversity of the structure system. The beam-type transfer story structure of high-rise building has been widely used, but in the existing transfer layer structure design methods, most of them are aimed at the transfer layer with single form and relatively simple force, and have a variety of forms. There are few design ideas, principles and design methods which can be followed by the transfer layer structure with more complex forces, which makes the designers choose the structure type and the section size in the actual engineering. The calculation model and method are difficult to grasp. Therefore, the mechanical performance, design and calculation method and construction treatment of the transfer layer structure are deeply studied. This paper uses the SATWE structural space finite element analysis and design software, taking the actual engineering structure with the beam type transfer story as the background. Based on the finite element analysis method of high-rise building and the theory of dynamic analysis, the stiffness ratio of the structure is changed by changing the position of the transfer floor and the upper and lower parts of the transfer floor. The response law of the structure under vertical static load, wind load and earthquake is analyzed, and the results of time history analysis and response spectrum analysis are compared by means of elastic dynamic time history analysis. The influence of the position of the transfer layer and the ratio of the upper and lower structure stiffness of the transfer layer on the seismic performance of the structure is obtained. The analysis shows that the higher the position of the transfer story, the smaller the horizontal displacement of the structure under vertical static load. The larger the horizontal displacement of the structure under the action of wind load, the more violent the maximum interstory displacement angle mutation, the larger the natural vibration period of the structure under earthquake, the larger the floor displacement and the more abrupt change in the interstory displacement angle. The greater the equivalent shear stiffness ratio between the transfer layer and its adjacent upper structure, the smaller the horizontal displacement of the structure under wind load, and the smaller the natural vibration period of the structure under earthquake. The reduction of floor displacement, the smaller the maximum interstory displacement angle, the greater the ratio of floor shear force and bending moment. For the future research and practical design work to provide relevant reference.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.3

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