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刚性假定的结构体系的Pushover分析方法已日趋成熟,但对于考虑土与结构动力相互作用(SSI)体系的研究和应用还很少。由于土与结构动力相互作用的复杂性,使得其非线性动力分析难于应用于工程实践,尚处于科学研究阶段。寻求一种相对简单的土与结构相互作用体系的非线性地震反应分析方法是目前需要解决的课题之一,基于能力谱法的Pushover分析方法为此问题的解决提供一条有效的途径。本文根据土与结构相互作用体系的经典模型,推导了一种等价的单自由度体系,基于这种等价体系提出了一种基于能力谱法的土与结构相互作用体系的Pushover分析方法,并与时程分析结果进行了比较,结果表明这种方法可以很好地预测土与结构相互作用体系的地震反应。
Pushover analysis methods for rigidly assumed structural systems have matured, but few studies and applications have been made to consider the soil-structure dynamic interaction (SSI) system. Due to the complexity of interaction between soil and structure, its nonlinear dynamic analysis is difficult to apply to engineering practice, and it is still in the stage of scientific research. The nonlinear seismic response analysis method of seeking a relatively simple soil-structure interaction system is one of the problems to be solved at present. The Pushover analysis method based on the power spectrum method provides an effective way to solve this problem. Based on the classical model of the interaction system between soil and structure, an equivalent single-degree-of-freedom system is deduced. Based on this equivalence system, a pushover method based on capacity spectrum method is proposed for the soil-structure interaction system. Compared with the results of time history analysis, the results show that this method can well predict the seismic response of the soil-structure interaction system.