大空间复杂混合结构体系的结构选型与计算分析

发布时间：2019-04-02 17:21

【摘要】：基于大空间复杂混合结构越来越多地应用于工程实践，对其进行更深入的本质了解和计算如何更方便地应用于工程实践已经迫在眉睫。本文针对复杂混合结构的协同分析和整体地震响应，结合相关的参考文献，在前人的工作基础上，以某大剧院为背景，应用通用设计有限元软件Midas Gen,研究大剧院的协同工作性能和整体协同结构在地震下的响应。本文主要做了以下工作： 1）从建筑功能性和外观性出发，对大剧院进行结构方案的确定和概念选型分析评价。 2）根据某大剧院的基本情况，根据不同体系特点，应用相应的计算假定，采用不同的设计软件进行单体设计，并在MidasGen平台下校核和组装成整体模型。 3）对单体模型和整体协同计算模型进行动静力分析和自振特性分析。分析内容包括：①分析不同单体和整体结构在动静力下的反力、位移、内力、稳定性响应，稳定性主要讨论了线弹性特征值屈曲问题和考虑几何非线性时第二类稳定问题，提出可供参考的屈曲荷载因子；②Rayleigh-ritz向量法计算所得频谱、基频、振型分析；③不同下部支承刚度和不同下部质量下，结构的静内力和动内力响应（重点观测网架部分）。分析结果表明：整体协同下结构某些部位的内力及位移等偏不利，有条件时工程设计宜考虑整体协同作用。 4）对整体协同模型进行高烈度区多点多维地震输入的补充计算，对比计算结果，，探讨多点多维计算情况下整体结构的地震响应。 5）最后，根据分析得到的研究成果，对影响混合结构协同效应和地震响应的主要因素和相关表现进行了总结，并提出意见和建议。
[Abstract]:Based on the fact that large space complex hybrid structures are more and more applied to engineering practice, it is urgent to understand and calculate how to apply them more conveniently in engineering practice. In this paper, according to the collaborative analysis and overall seismic response of complex hybrid structures, combined with related references, and on the basis of previous work, based on the background of a grand theater, a general finite element design software Midas Gen, is applied in this paper. The cooperative performance of the Grand Theater and the response of the whole cooperative structure under earthquake are studied. The main work of this paper is as follows: 1) from the point of view of architectural function and externality, the structure scheme of the Grand Theater is determined and the concept selection is analyzed and evaluated. 2) according to the basic situation of a theater, according to the characteristics of different systems, the corresponding calculation assumptions are applied, and different design software is used to design the monomers, and the whole model is checked and assembled under the platform of MidasGen. 3) the dynamic and static analysis and the natural vibration characteristic analysis of the single model and the whole collaborative calculation model are carried out. The main contents of the analysis are as follows: (1) the response, displacement, internal force, stability response and stability of different monomers and whole structures under dynamic and static conditions are analyzed, and the buckling of linear elastic eigenvalues and the second kind of stability problems considering geometric nonlinearity are discussed. The buckling load factors which can be used for reference are put forward. The frequency spectrum, fundamental frequency and mode shape analysis obtained by 2Rayleigh-ritz vector method, and (3) the static and dynamic internal force responses of the structure under different lower support stiffness and different lower mass (focus on the observation of the space truss part). The analysis results show that the internal force and displacement of some parts of the structure under the overall coordination are unfavorable, and the overall synergy should be considered in the engineering design under the conditions. 4) the supplementary calculation of multi-point and multi-dimensional earthquake input in high intensity region is carried out, and the seismic response of the whole structure under multi-point and multi-dimensional calculation is discussed by comparing the calculated results. 5) finally, according to the research results obtained from the analysis, the main factors affecting the synergistic effect and seismic response of the hybrid structure and the related performance are summarized, and some suggestions and suggestions are put forward.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU399;TU318

【参考文献】