高层建筑短肢剪力墙结构抗震性能分析

发布时间：2018-02-12 14:51

本文关键词： 高层建筑短肢剪力墙结构抗震性能墙肢厚度连梁高度　出处：《兰州交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：21世纪是城市的世纪，，我国正处在城市化进程加快发展阶段，越来越多的人涌进城市，如何在有限的土地上建造抗震性能良好并且经济合理的高层建筑就成了人们需要去研究的方向。而在高层建筑结构体系中，短肢剪力墙结构作为一种新型结构体系，吸收了框架结构和普通剪力墙结构的优点，既节省了材料用量又具有良好的承载能力，另外在结构布置上还避免了露梁露柱等现象，能够较好的满足建筑使用功能，得到了住户、开发商和设计人员的好评。短肢剪力墙结构是由普通剪力墙结构和异形柱框架结构演变而来，对于它的研究，特别是在整体结构的地震反应方面的研究相对较少。为了充分了解其抗震性能，本文以西安市某高度为50.4m的剪力墙结构高层住宅楼为背景，在适当简化的基础上，通过缩短部分墙肢的方法设计出短肢剪力墙结构方案和异形柱框架剪力墙结构方案，并通过PKPM软件验证了这两种方案的轴压比、位移比和刚重比等相关指标，从而说明了方案的合理性。然后，利用大型通用有限元软件ANSYS建立普通剪力墙、短肢剪力墙和异形柱框架剪力墙这三种结构的模型，将短肢剪力墙结构与这两种相近的结构体系进行比较分析，对比其在抗震性能方面的差异，综合评价短肢剪力墙结构的抗震性能，同时针对短肢剪力墙结构，改变其墙肢厚度和连梁高度，分析这两种构件对结构整体性能的影响。本文主要工作如下： 1.通过对相关文献的收集和检索，介绍了短肢剪力墙结构相关特点，并且从理论研究和实验研究两个方面论述了短肢墙结构的研究现状。 2.总结并介绍了结构抗震分析的理论和方法，包括静力理论、反应谱理论和时程分析理论。 3.对短肢剪力墙结构与异形柱框架剪力墙结构和普通剪力墙结构进行模态分析，比较其自振特性之间的差异，然后针对短肢剪力墙结构，改变其墙肢厚度和连梁高度，分析这两个因素对结构自振特性的影响。 4.分别对短肢剪力墙结构与异形柱框架剪力墙结构和普通剪力墙结构进行振型分解反应谱分析和弹性时程分析，对比结构变形和受力的差异。并且，分析了墙肢和连梁这两种构件对其抗震性能的影响。 5.对结构进行罕遇地震下的静力弹塑性分析，进一步对比结构在罕遇地震下的整体抗侧移刚度、承载能力、延性和耗能能力，对短肢剪力墙结构在大震作用下的可靠性做出更加全面的评估。通过本文的分析可以为短肢剪力墙结构在高层建筑中的应用以及该结构体系的抗震设计提供相应的参考。
[Abstract]:21th century is the century of the city, our country is in the urbanization process speed up the development stage, more and more people flock into the city. It is necessary to study how to build high-rise buildings with good seismic performance and reasonable economy on limited land. In the high-rise building system, the short-leg shear wall structure is a new type of structural system. It absorbs the advantages of frame structure and common shear wall structure, saves the material consumption and has good bearing capacity, and avoids the phenomena of exposed beam and open column in the structure layout, which can better meet the function of building. The short leg shear wall structure is evolved from the ordinary shear wall structure and the special-shaped column frame structure. In order to fully understand the seismic performance of the whole structure, in order to fully understand its seismic performance, this paper takes a high-rise residential building with shear wall structure of 50.4m height in Xi'an as the background, on the basis of proper simplification. The short leg shear wall structure scheme and the special-shaped column frame shear wall structure scheme are designed by the method of shortening part of the wall limb, and the relevant indexes such as axial compression ratio, displacement ratio and rigid-weight ratio of the two schemes are verified by PKPM software. The rationality of the scheme is illustrated. Then, the models of three kinds of structures, namely, common shear wall, short leg shear wall and special-shaped column frame shear wall, are established by using the large-scale universal finite element software ANSYS. The short leg shear wall structure is compared with these two similar structure systems, and the difference in seismic performance is compared, and the seismic performance of the short limb shear wall structure is comprehensively evaluated, at the same time, the short leg shear wall structure is analyzed. By changing the thickness of the wall limb and the height of the connecting beam, the influence of these two kinds of members on the overall performance of the structure is analyzed. The main work of this paper is as follows:. 1. Through the collection and retrieval of relevant literature, the characteristics of short leg shear wall structure are introduced, and the current research situation of short leg shear wall structure is discussed from two aspects: theoretical and experimental research. 2. The theories and methods of seismic analysis of structures are summarized and introduced, including static theory, response spectrum theory and time-history analysis theory. 3. The modal analysis of short leg shear wall structure, special-shaped column frame shear wall structure and ordinary shear wall structure is carried out, and the difference between their natural vibration characteristics is compared. Then, the thickness of short leg shear wall structure and the height of connecting beam are changed according to the short leg shear wall structure. The influence of these two factors on the natural vibration characteristics of the structure is analyzed. 4. The mode decomposition response spectrum analysis and elastic time history analysis of short leg shear wall structure, frame shear wall structure with special-shaped column and ordinary shear wall structure are carried out respectively, and the differences of deformation and force are compared. The influence of the wall member and the connecting beam on the seismic performance is analyzed. 5. The static elastic-plastic analysis of the structure under rare earthquake is carried out, and the overall lateral displacement stiffness, bearing capacity, ductility and energy dissipation capacity of the structure under rare earthquake are further compared. A more comprehensive evaluation of the reliability of short-leg shear wall structures under the action of large earthquakes is made. The analysis in this paper can provide a reference for the application of short-leg shear wall structure in high-rise building and the seismic design of the structure system.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.16

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