带加强层的框架—核心筒高层建筑结构抗震受力性能分析

发布时间：2018-01-14 09:01

本文关键词：带加强层的框架—核心筒高层建筑结构抗震受力性能分析　出处：《安徽建筑大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着现代社会科技发展日新月异,高层建筑越来越多的涌现在人们眼前,并且成为了一个城市的标志。高层建筑能够更好的利用结构竖向空间面积,完美的解决了人们的居住和办公问题。常见的高层建筑结构形式有框架结构、筒中筒结构以及带加强层的高层建筑结构等。近些年来,地震发生的频繁性,致使高层建筑的安全性越来越受到挑战。08年的汶川地震使得大量的高层建筑倒塌,成为了危害人们安全的最主要因素。现代的高层建筑为了增强结构的整体性,降低结构的侧向位移,常在结构上设置加强层。不同数量的加强层使高层建筑受力更加均匀,但是在加强层处的受力分析就比较复杂,容易在加强层附近形成薄弱层。因此,对带加强层的框架-核心筒高层建筑结构要合理的布置加强层,这样对整个建筑结构抗震是非常有效的。现在梁式加强层普遍应用于高层建筑中,而对钢筋混凝土斜腹杆桁架式加强层缺少深入的研究,在这方面需要国内学者进行深入的研究与改进完善。本文在前人研究的基础上进行了如下的研究:1.首先介绍了高层建筑的定义、高层建筑的类型以及高层建筑的特点,并对不同的结构体系做了简要的介绍,指出了加强层的类型、作用和至今为止的研究情况,总结了加强层的工作机理、优缺点以及设置加强层的意义。2.本文以某省待建的高层框架-核心筒结构为例,运用结构分析软件MIDAS建立该结构的有限元计算模型,并在结构原模型的基础上分别布置了一道加强层,两道加强层和三道加强层的五种计算模型,并利用软件计算出各个模型的各项参数,以此为下一步抗震受力性能分析做好准备。3.采用不同的结构模型进行地震作用下的振型反应谱谱分析法,得到原模型以及布置了加强层的结构自振周期、层间位移以及结构层间位移角等各项参数,通过分析对比各个模型的计算结果,得到该结构模型的加强层最佳布置方案。结构的剪力滞后现象对于框筒结构来说危害比较严重,需要加强重视。尽量通过结构设计方案来缓解其危害,不然会是结构的一项不安全因素。本文对设置加强层的几个模型进行研究,探讨了不同模型中剪力滞后现象的程度,以此来选择结构最佳布置方案。4.通过有限元软件PKPM中的SATWE模块对本结构的不同模型进行弹性时程分析,以此来进行结构设计的补充计算。本文选取了三条地震波,运用PKPM中的EPDAPUSH进行结构的受力分析,得出结构的弯矩以及位移等各项参数变化情况,通过对计算结果的分析比较,得出该高层建筑的加强层最佳布置方案。
[Abstract]:With the rapid development of science and technology in modern society, more and more high-rise buildings appear in front of people, and become the symbol of a city. High-rise buildings can make better use of the vertical space area of structure. Perfect solution to people's living and office problems. The common high-rise building structure forms are frame structure, tube structure and high-rise building structure with strengthened story, etc. In recent years, the frequent occurrence of earthquakes. The safety of high-rise buildings is more and more challenged. The Wenchuan earthquake in 2008 caused a large number of high-rise buildings to collapse. In order to enhance the integrity of the structure and reduce the lateral displacement of the structure, modern high-rise building has become the most important factor that endangers the safety of people. Strengthening layer is often set on the structure. Different numbers of strengthened layers make the force of high-rise buildings more uniform, but the stress analysis at the strengthened layer is more complex, easy to form a weak layer near the strengthened layer. For the frame-core tube high-rise building structure with strengthened story, it is very effective for the whole building structure to earthquake resistance, so it is very effective. Now the beam reinforced story is widely used in the high-rise building. However, the reinforced concrete reinforced concrete reinforced concrete reinforced concrete inclined web truss reinforced layer is lack of in-depth research. In this respect, domestic scholars need in-depth research and improvement. Based on the previous studies, this paper carries out the following research: 1. First of all, the definition of high-rise building is introduced. The types of high-rise buildings and the characteristics of high-rise buildings, and the different structural systems are briefly introduced, the types, functions and research situation of strengthening stories are pointed out, and the working mechanism of strengthened floors is summarized. The advantages and disadvantages and the significance of setting the strengthened layer. 2. Taking the high-rise frame-core tube structure to be built in a province as an example, the finite element calculation model of the structure is established by using the structure analysis software MIDAS. On the basis of the original model of the structure, five kinds of calculation models are arranged, including one strengthening layer, two strengthening layer and three strengthening layer, and the parameters of each model are calculated by software. This is the next step to prepare for the seismic performance analysis. 3. Different structural models are used to analyze the mode response spectrum under the earthquake, the original model and the natural vibration period of the strengthened structure are obtained. 3. By analyzing and comparing the calculation results of each model, the parameters such as floor displacement and the displacement angle of the structure are analyzed and compared. Get the best arrangement scheme of the structure model. The shear lag phenomenon of the structure is more serious to the frame-tube structure, need to be paid more attention to, as far as possible through the structural design scheme to alleviate its harm. Otherwise, it will be an unsafe factor of structure. In this paper, several models of strengthening layer are studied, and the degree of shear lag in different models is discussed. The optimal layout of the structure. 4. Through the SATWE module in the finite element software PKPM, the elastic time history analysis of different models of the structure is carried out. In this paper, three seismic waves are selected and the EPDAPUSH in PKPM is used to analyze the stress of the structure. Through the analysis and comparison of the calculation results, the best arrangement scheme of the strengthening story of the high-rise building is obtained.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU973.31

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