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探讨了结构静力弹塑性分析方法的基本原理,指出了该方法目前存在的缺陷,基于模态Pushover法(MPA)提出了根据振型参与重量来确定对结构地震反应起主要影响的振型数以及两阶段的侧向力加载模式,并对确定结构目标位移的方法作了一些改进。采用动力时程分析法和改进的静力弹塑性方法,对一个优化钢框架结构的地震反应进行了数值模拟分析,其结果表明,采用本文改进的静力弹塑性分析方法对结构进行推覆分析,能较准确地模拟结构的地震反应,具有易操作、计算精度高的优点。
In this paper, the basic principle of the static analysis method is discussed. The existing defects of this method are pointed out. Based on the modal pushover method (MPA), the number of modes that mainly affect the seismic response of structures is determined according to the modal participation weight As well as the two-stage lateral force loading mode, and made some improvements to the method of determining the displacement of the structure target. The seismic response of an optimized steel frame structure is numerically simulated by dynamic time history analysis and improved static elasto-plastic method. The results show that the improved elasto-plastic analysis method is applied in the analysis of the structure's pushover analysis , Can simulate the seismic response of the structure more accurately, has the advantages of easy operation and high calculation accuracy.