庐江体育馆协同工作分析

发布时间：2017-12-28 19:05

本文关键词：庐江体育馆协同工作分析　出处：《安徽建筑大学》2016年硕士论文　论文类型：学位论文

【摘要】：在现代社会,空间结构体系因为有着很多的优点,已成为一种应用非常普遍的结构形式。随着这类结构的增加,对于其力学性能的研究也越来越多。在本文中,首先对空间结构的发展历程做了介绍,列举了在以往的工作中研究人员及学者对空间结构的研究成果。在前人的研究成果、计算方法以及他们不足之处的基础上,本文以庐江体育馆为工程背景,利用结构设计分析软件MIDAS Gen对于大跨空间结构的上下部结构的协同工作进行了研究,并得到一些关于此类空间结构相互作用的力学性能特点,希望对于此类工程在实际工程设计中起到帮助作用。此外,文章还对“边界条件”和“阻尼比”这两个会在此类结构计算过程中出现的关键问题进行了研究。本文的主要工作有:首先,本文对整体结构模型和不同边界条件下支座简化模型的内力和位移进行了对比分析,通过计算结果提出在空间结构设计过程中应当充分考虑支承结构的影响,如果没有考虑边界条件对于网架结构的影响,计算结果将会偏向于不安全。此外,文中对不同支承刚度的模型作对比,比较不同的支座刚度模型的计算结果。然后,运用子空间迭代法对结构进行了自振特性分析,得出该结构在地震作用下的自振频率和振型模态。通过对不同模型的结果作对比,揭示该结构在地震作用下的自振特性。最后,运用时程分析法对比分析了不同模型在水平和竖向地震共同作用下的地震响应,对比分析整体结构模型和弹性支座模型在地震作用下的内力和位移特点。于此同时本文对比分析了钢结构与混凝土结构的组合结构中阻尼比的计算方法,通过MIDAS Gen中组阻尼比计算方法计算出不同振型下结构阻尼比。然后通过对比不同阻尼比下模型的内力以及位移,得出了其对结构计算的影响。
[Abstract]:In modern society, the spatial structure system has become a very common structural form because of its many advantages. With the increase of such structures, more and more studies have been made for their mechanical properties. In this paper, the development process of space structure is introduced first, and the research achievements of researchers and scholars on space structure in the past work are listed. Based on the former research results, calculation methods and their shortcomings, this paper takes Lujiang stadium as engineering background, analysis software MIDAS Gen was studied for the collaborative work of substructure of long-span spatial structure by structure design, and get some of this space structure interaction mechanics characteristics, hope for such the project to play a useful role in practical engineering design. In addition, the paper also studies the key problems that occur during the calculation of such structures, such as "boundary condition" and "damping ratio", which are the two problems in the calculation of such structures. The main works of this paper are: firstly, this paper makes a comparative analysis of the internal force and displacement of the whole structure model and simplified model of bearing under different boundary conditions, the calculated results by the proposed spatial structure in the design process should fully consider the influence of the support structure, without considering the boundary conditions for the grid structure, the calculation results will be biased in favor of not safe. In addition, the different support stiffness models are compared, and the results of different support stiffness models are compared. Then, the self vibration characteristics of the structure are analyzed by the subspace iteration method, and the self vibration frequency and mode mode of the structure under the earthquake action are obtained. By comparing the results of different models, the self vibration characteristics of the structure under the action of earthquake are revealed. Finally, the time history analysis method is applied to compare the seismic responses of different models under horizontal and vertical earthquakes. The internal force and displacement characteristics of the whole structural model and the elastic support model under earthquake action are compared. At the same time, this paper compares and analyzes the calculation method of damping ratio in composite structure of steel structure and concrete structure, and calculates damping ratio of structure under different vibration modes by means of group damping ratio calculation method in MIDAS Gen. Then by comparing the internal force and displacement of the model with different damping ratio, the influence of the model on the structure calculation is obtained.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU311.4

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