高宽比对高层建筑结构地震作用下桩基反力影响研究

发布时间：2018-03-26 02:30

本文选题：高层建筑　切入点：大高宽比　出处：《太原理工大学》2017年硕士论文

【摘要】：高层建筑为了能够满足通风和采光的要求,通常会减小结构的宽度,另外现在结构的高度也越来越高,这就可能造成结构在高宽比上超过规范的要求,导致地基基础在强震下失效。而且现在主要的结构设计中对于基础的设计还是单独设计,没有考虑过上部结构与基础共同作用来整体设计建筑结构。本文主要根据某一工程实例对于在地震作用下考虑上部结构和基础共同作用结构的反应分析,主要进行了以下工作:(1)详细介绍了高层建筑的发展和考虑共同作用方法的发展。(2)介绍了上部结构和基础共同作用各个模型的优缺点和适用条件,根据本文的实际情况选取合适的相互作用模型,同时介绍了共同作用的理论。(3)本文是以ETABS有限元软件进行的模拟,对于该软件的适用条件和单元库进行了介绍,使用该软件进行有限元分析的地震波的输入方法进行了详述。(4)以工程实例对于考虑共同作用和不考虑共同作用的结构分别建立模型,在输入三条地震动波下,比较两个模型在三条波作用下的最大包络值下,探讨了考虑相互作用后与不考虑相互作用的自振周期、变形和内力的变化,对于以后的设计起到参考作用。(5)通过改变结构的高度来改变高宽比,比较不同高宽比的结构考虑相互作用后在地震作用下上部结构和桩体的内力和变形,得到在大高宽比下结构的变化,对于实际中建造大高宽比建筑在设计中的内力和位移变化提供参考和建议。
[Abstract]:In order to meet the requirements of ventilation and lighting, high-rise buildings usually reduce the width of the structure. In addition, the height of the structure is becoming higher and higher, which may cause the structure to exceed the specification in aspect ratio. Which causes the foundation to fail under the strong earthquake. And in the main structural design, the foundation is still designed separately. In this paper, the response analysis of superstructure and foundation interaction under seismic action is mainly based on a project example, which is based on the analysis of the response of the superstructure and the foundation to the interaction between the superstructure and the foundation. The main work is as follows: 1) the development of high-rise building and the development of considering the method of common action are introduced in detail.) the advantages and disadvantages and applicable conditions of each model of superstructure and foundation interaction are introduced. According to the actual situation of this paper, the appropriate interaction model is selected, and the theory of interaction is introduced. The simulation is carried out by ETABS finite element software, and the applicable conditions and the element library of the software are introduced. The seismic wave input method of finite element analysis using this software is described in detail. (4) taking engineering examples to establish models for structures that consider the interaction and do not consider the interaction respectively, under the input of three seismic waves, Comparing the maximum envelope values of the two models under the action of three waves, the changes of the natural vibration period, deformation and internal force after and without the interaction are discussed. It can be used as a reference for the later design.) by changing the height of the structure to change the aspect ratio, the internal force and deformation of the superstructure and the pile body under earthquake action are compared after considering the interaction between the structures with different aspect ratio. The variation of the structure under the large aspect ratio is obtained, which provides a reference and suggestion for the actual construction of the internal force and displacement change of the large aspect ratio building in the design.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31;TU473.1

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