基于ANSYS的高层钢结构抗震及稳定性分析

发布时间：2018-10-09 08:51

【摘要】：目前,钢结构已经大量用于各种体型复杂的高层建筑。很多高层建筑因其建筑体型变化多端,跨度大,其分析难度和分析的精度要求都很高,所以钢结构的抗震性能分析和稳定性分析显得尤为重要。本文通过一个带巨型框架梁的高层框架结构为实例,利用ANSYS对其进行模态分析,得出其振动特性,如周期、频率、振型等。以此为基础对结构进行反应谱分析,得出结构的位移和位移角曲线,结构的变形图、应力云图等。另外,作者选取天津波对结构进行了时程分析,得到了结构的应力分布云图、变形云图、结构的位移和位移角曲线等。并与反应谱分析的结果进行了对比,得出了一些具有工程参考价值的结论。最后,对结构进行线性屈曲分析,在线性屈曲分析的基础上对结构进行几何和材料双非线性屈曲分析,得到结构的屈曲模态和屈曲薄弱部位以及屈曲荷载。通过对这些数据的分析,评价了此结构的巨型梁对结构性能的影响。同时,本文还介绍了ANSYS各种分析功能的基本步骤,以及分析时要注意的问题,最后还提出了一些尚待解决的问题,包括屈曲荷载组合,动力屈曲分析,屈曲系数相关问题。
[Abstract]:At present, steel structures have been widely used in a variety of complex tall buildings. Because of the variety of shape and span of many high-rise buildings, the difficulty of analysis and the precision of analysis are very high, so the seismic performance analysis and stability analysis of steel structures are very important. In this paper, a high-rise frame structure with a mega frame beam is used as an example, and its vibration characteristics, such as period, frequency, mode shape, etc., are obtained by modal analysis with ANSYS. On this basis, the response spectrum of the structure is analyzed, and the displacement and displacement angle curves, the deformation diagram and the stress cloud diagram of the structure are obtained. In addition, the author selects Tianjin wave to carry on the time history analysis to the structure, obtains the structure stress distribution cloud diagram, the deformation cloud picture, the structure displacement and the displacement angle curve and so on. Compared with the results of reaction spectrum analysis, some conclusions of engineering reference value are obtained. Finally, the linear buckling analysis of the structure is carried out. On the basis of the linear buckling analysis, the geometric and material double nonlinear buckling analysis of the structure is carried out, and the buckling mode, the weak part of the buckling and the buckling load are obtained. Through the analysis of these data, the influence of the giant beam on the performance of the structure is evaluated. At the same time, this paper also introduces the basic steps of various analytical functions of ANSYS, as well as the problems to be paid attention to in the analysis. At last, some unsolved problems are put forward, including buckling load combination, dynamic buckling analysis and buckling coefficient.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.13

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