考虑桩—土—结构相互作用的上海中心大厦miranda模型地震反应研究
发布时间：2018-11-18 20:00
【摘要】：上海中心大厦是上海陆家嘴金融中心区规划发展的三座超高层建筑之一，是陆家嘴地区最后一个开始建设的超高层建筑（金茂大厦420.5m1998年，环球金融中心497m2008年），也是其中最高的（632m）。基于这些原因，上海中心大厦的重要性不言而喻。 清华大学土木工程系根据miranda提出的广义层间位移谱模型，基于MSC.marc建立了上海中心大厦的简化模型，并按照《建筑抗震设计规范》的规定，对模型进行刚性地基假定下的动力时程分析。然而很多的研究表明，由于地基土并非绝对刚性，地基土对上部结构是有影响的，特别是当地基为软土时，这种影响特别显著，因此考虑土-结构相互作用影响是非常必要的。 本文采用ANSYS软件分别就刚性地基假定下上海中心大厦miranda模型（以下简称上部结构）、考虑桩-土-结构相互作用的上海中心大厦miranda模型（以下简称整体结构）进行了动力时程分析的计算，并对两者进行了比较，得出一些有益的结论。 本文还提取了基础处的加速度耦合项，与原地震波叠加，形成修正地震波，，将修正地震波输入到以刚性基础为假定的上部结构中，以考虑相互作用带来的影响，为减小结构抗震计算规模提供了支撑。
[Abstract]:Shanghai Central Tower is one of the three super high-rise buildings planned for development in Lujiazui Financial Center of Shanghai. It is the last super high-rise building in Lujiazui area (Jinmao Tower 420.5m1998, Global Financial Center 497m2008 year). It is also the highest (632 m). For these reasons, the importance of the Shanghai Center Tower is self-evident. According to the generalized interstory displacement spectrum model put forward by miranda, the simplified model of Shanghai Central Building was established by the Department of Civil Engineering of Tsinghua University based on MSC.marc, and according to the regulations of the Code for Seismic Design of buildings, The dynamic time history analysis of the model is carried out under the assumption of rigid foundation. However, many studies show that because the foundation soil is not absolutely rigid, the foundation soil has an effect on the superstructure, especially when the foundation is soft soil, so it is necessary to consider the soil-structure interaction. In this paper, the miranda model of Shanghai Central Mansion (hereinafter referred to as superstructure) under the assumption of rigid foundation is studied by ANSYS software. The dynamic time history analysis of the miranda model of Shanghai Central Mansion (hereinafter referred to as the whole structure) considering the pile-soil-structure interaction is carried out, and some useful conclusions are obtained by comparing the two models. In this paper, the acceleration coupling term at the foundation is extracted and superimposed with the original seismic wave to form the modified seismic wave. The modified seismic wave is input into the superstructure assumed by the rigid foundation to consider the effect of the interaction. It provides the support for reducing the seismic calculation scale of the 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
本文编号：2341046
[Abstract]:Shanghai Central Tower is one of the three super high-rise buildings planned for development in Lujiazui Financial Center of Shanghai. It is the last super high-rise building in Lujiazui area (Jinmao Tower 420.5m1998, Global Financial Center 497m2008 year). It is also the highest (632 m). For these reasons, the importance of the Shanghai Center Tower is self-evident. According to the generalized interstory displacement spectrum model put forward by miranda, the simplified model of Shanghai Central Building was established by the Department of Civil Engineering of Tsinghua University based on MSC.marc, and according to the regulations of the Code for Seismic Design of buildings, The dynamic time history analysis of the model is carried out under the assumption of rigid foundation. However, many studies show that because the foundation soil is not absolutely rigid, the foundation soil has an effect on the superstructure, especially when the foundation is soft soil, so it is necessary to consider the soil-structure interaction. In this paper, the miranda model of Shanghai Central Mansion (hereinafter referred to as superstructure) under the assumption of rigid foundation is studied by ANSYS software. The dynamic time history analysis of the miranda model of Shanghai Central Mansion (hereinafter referred to as the whole structure) considering the pile-soil-structure interaction is carried out, and some useful conclusions are obtained by comparing the two models. In this paper, the acceleration coupling term at the foundation is extracted and superimposed with the original seismic wave to form the modified seismic wave. The modified seismic wave is input into the superstructure assumed by the rigid foundation to consider the effect of the interaction. It provides the support for reducing the seismic calculation scale of the 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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