【摘要】 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。更多还原

【Abstract】 So far,it is lacking in the study about pushover analysis procedure for SSI system while this method is developed for the structure with rigid foundation.However,the complexity of soil structural interaction system makes that the so-called time history method is hard to be used in practical engineering analysis.A pushover analysis approach for analysis of SSI system is put forward based on the capacity spectrum method.An equivalent SDOF system is investigated on the basis of the classical model of SSI system,and then a pushover procedure is proposed based on this equivalent SDOF system with the modified response spectrum and equivalent capacity spectrum.With this pushover analysis method,the control benchmark 3-story steel building was analyzed,and the result was compared with the result of time history method.It shows that this pushover procedure can be used to evaluate the seismic response of SSI system successfully.更多还原