【作者】 张峰；

【导师】 张杰；

【作者基本信息】 西南交通大学 ， 结构工程， 2006， 硕士

【摘要】 近年来,Push-over分析法作为一种静力弹塑性分析法,由于其易于实施,分析结果较精确,能够有效地模拟结构从受力到破坏的全过程,及时发现结构的薄弱环节等优点在结构抗震分析中得到了越来越多的重视。 然而,对于Push-over分析法的实际应用还有一些难题需要进行深入的研究,如加载模式的合理选择、目标位移、适用条件等。 本文以一低层和一高层结构为例,借助有限元软件SAP2000/ETABS进行了Push-over分析,主要开展了以下工作: (1) 介绍了非线性静力分析Push-over法的发展历程及其理论基础。 (2) 对两种钢框架分别采用五种不同的加载模式,研究分析加载模式对Push-over分析的影响。当结构层数较低时,在没有支撑的情况下,各种模式的分析结果有一定差异,而采用支撑后结果几乎一样;当结构层数较高时,模式A、D的分析结果较大,模式C的分析结果较小。 (3) 将Push-over分析法的结果与时程分析法的结果进行对比。通过对比可以看出两种方法的分析结果有一定差异,但差别不是太大,这进一步验证了Push-over分析的正确性。 (4) 介绍了Push-over分析结果的处理。 (5) 总结此方法的特点与局限性。更多还原

【Abstract】 In recent years ,as a static Elastic- Plastic analysis method, Push-over analysis is easy to implement and is a more accurate analysis method. The structure can be effectively simulated from bearing force to damage.It can discover structural weaknesses, thus effective measures can be taken to avoid damage to these parts. So it has been increasing attention in aseismic analysis.However, some problems about the practical application of Push-over requires in-depth research, such as reasonable options of loading model, target displacement and conditions of application,etc.In this thesis, taking the example of a low-level structure and a high-level structure with the help of SAP2000/ETABS,a famous FEM software. The major work carried out following:(1) Introducing the development and theoretical basis of nonlinear static analysis.(2) Applying five different loading models for two steel frames, analyzing the impact of different loading models to push-over. When the structure has lower storeys and has no braces, various models have some differences in the results of the analysis,if braces exists,the results are almost the same;When the structure storeys is high, the model A, D analysis will be larger and model C will be minor in the results of the analysis.(3) Comparing the results of Push-over and time-history methods As can be seen by comparing the two methods in the results of the two analysis, they have some differences, but the difference is not too big, which further proove the validity of Push-over..(4) Introducing the processing of the results of Push-over.(5) Summary of the characteristics and limitations of this method.更多还原