考虑土—结构相互作用的上海中心大厦简化模型地震反应分析

发布时间：2018-05-12 17:38

本文选题：土－结构相互作用 + 鱼骨模型　；参考：《天津大学》2013年硕士论文

【摘要】：本文以土－结构相互作用理论为基础，分析了考虑相互作用上海中心大厦简化模型在地震作用下的动力响应，并与刚性基础为假定模型进行了比较分析。利用ANSYS软件建立了上海中心大厦简化模型，简化模型是采用清华大学课题组已建成MARC简化模型参数，对参数进行转换在ANSYS有限元软件中进行的建模。地下室部分则采用延伸上部结构的办法进行简化，桩土区域采用均质体进行等效，土体分为塑性区域与弹性区域，塑性区土采用DP模型，弹性区土则采用超单元进行分析，以便减少计算成本。考虑土－结构相互作用的整体结构和以刚性地基为假定的上部结构动力分析结果表明：考虑相互作用之后，结构的周期延长，结构顶点的位移峰值增大，，但结构自身的变形和层间位移却减小，土对结构的影响不可忽略。本文还引用修正地震波的概念，采用求得地基处耦合内力与输入地震波叠加形成修正地震波的方法，为输入修正地震波能考虑相互作用因素来分析相同结构的精细模型动力反应提供条件。
[Abstract]:Based on the soil-structure interaction theory, the dynamic response of the simplified model of Shanghai Central Mansion considering interaction under earthquake is analyzed and compared with the assumed model of rigid foundation. The simplified model of Shanghai Central Mansion is established by using ANSYS software. The simplified model is based on the simplified parameters of MARC model built by Tsinghua University, and the parameters are converted into ANSYS finite element software. The basement part is simplified by extending the superstructure, the pile-soil area is equivalent by homogeneous body, the soil is divided into plastic region and elastic area, the plastic zone soil is analyzed by DP model, and the elastic zone soil is analyzed by superelement. In order to reduce the calculation cost. The results of dynamic analysis of the whole structure considering soil-structure interaction and the superstructure assumed by rigid foundation show that the period of the structure is prolonged and the peak displacement of the structure vertex is increased after considering the interaction. However, the deformation and interstory displacement of the structure itself are reduced, and the influence of soil on the structure can not be ignored. In this paper, the concept of modified seismic wave is also introduced, and the method of calculating the superposition of the coupled internal force and the input seismic wave at the foundation to form the modified seismic wave is adopted. The condition is provided for the input of modified seismic wave energy to consider the interaction factors to analyze the dynamic response of the fine model of the same structure.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.212

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