基于性能的重型钢结构厂房抗震性能分析

发布时间：2019-06-17 12:42

【摘要】：地震是一种破坏性极强的自然灾害,建筑结构的抗震设计工作尤为重要。钢结构厂房在工业建筑中的应用非常多,具有强度高、自重轻、空间布置灵活等优点。通过对历次震害资料的统计发现,钢结构厂房的抗震性能较好,但也不乏倒塌破坏的结构。近年来,基于性能的抗震设计在国际上比较流行,这种方法旨在对结构处于不同地震水准下的性能进行控制,将震害可能造成的损失降到最小,具有比普通抗震设计更为具体、高标准的性能目标。本文以这种思想为主导思想,以通用有限元SAP2000软件作为辅助工具,对某重型钢结构厂房进行了结构设计与相关分析。通过模态分析了解了结构的自振特性,通过小震和中震下的反应谱分析和验算,可知本工程的钢结构厂房具有良好的抗震性能,能够满足不同地震水准下的性能水准。并且重点研究了结构在大震下的静力弹塑性分析,对比了不同侧向加载方式对分析结果的影响,将分析得到的结构构件的变形破坏情况和结构的层间位移角作为评价指标,采用能力谱法对结构进行性能评估。通过三水准下的结构地震响应分析,得出结论本结构能够满足性能目标的要求。另外,在本工程结构中,也探索了新技术的应用,将结构中处于不同位置的普通支撑替换为屈曲约束支撑,通过对比原结构模型与设置屈曲约束支撑的结构模型的分析结果发现,由于屈曲约束支撑发挥了第一道防线的作用,使结构在大震下的破坏情况得以改善,并且不同的布置方式也会对结构的自振特性产生较大影响,宜均匀布置。通过本文的分析与论述,希望研究的成果能够对相关设计人员有参考的价值,推进我国钢结构厂房抗震性能的研究。
[Abstract]:Earthquake is a very destructive natural disaster, and the seismic design of building structures is particularly important. Steel structure factory building is widely used in industrial buildings, which has the advantages of high strength, light weight, flexible spatial layout and so on. Through the statistics of the earthquake damage data, it is found that the seismic performance of the steel structure factory building is good, but there is no lack of collapsed structures. In recent years, performance-based seismic design is more popular in the world. This method aims to control the performance of structures under different seismic levels, reduce the possible loss caused by earthquake damage to a minimum, and has more specific and high standard performance objectives than ordinary seismic design. In this paper, taking this idea as the leading idea and the general finite element SAP2000 software as the auxiliary tool, the structural design and correlation analysis of a heavy steel structure factory building are carried out. The natural vibration characteristics of the structure are understood by modal analysis. Through the response spectrum analysis and checking calculation under small and medium earthquakes, it can be seen that the steel structure factory building of this project has good seismic performance and can meet the performance level under different seismic levels. The static elastic-plastic analysis of the structure under large earthquake is studied, and the influence of different lateral loading methods on the analysis results is compared. the deformation and failure of the structural members and the interstory displacement angle of the structure are taken as the evaluation index, and the capacity spectrum method is used to evaluate the performance of the structure. Through the seismic response analysis of the structure under three levels, it is concluded that the structure can meet the requirements of the performance target. In addition, in this engineering structure, the application of new technology is also explored, and the ordinary braces in different positions in the structure are replaced by buckling constrained brands. by comparing the analysis results between the original structural model and the structural model with buckling constrained braces, it is found that the failure of the structure under large earthquakes can be improved because the buckling constrained braces play the role of the first line of defense. And different arrangement methods will also have a great impact on the natural vibration characteristics of the structure, so it is appropriate to arrange evenly. Through the analysis and discussion of this paper, it is hoped that the research results can be of reference value to the relevant designers and promote the study of seismic performance of steel structure factory buildings in China.
【学位授予单位】：长春工程学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11;TU391

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