【摘要】 利用完全解耦的方法对适应谱Pushover方法进行简化,建立了更适于工程实际应用的改进的适应谱Pushover方法(IASPA法).利用该方法对四种典型地震动作用下的桥墩进行计算分析,并将计算结果与倒三角分布模式、均匀分布模式的Pushover分析的结果和非线性时程分析的结果进行对比研究.结果表明,改进的适应谱Pushover方法比其它两种Pushover方法的计算结果更接近于非线性时程分析的结果,从而验证了该方法的有效性.更多还原

【Abstract】 The principal objective of this investigation is to develop an improved adaptive spectra-based pushover analysis procedure (IASPA) which applies to the engineering practice. The seismic performance of a pier determined by IASPA was compared with that determined by the pushover analysis using two force distributions in FEMA274 which are linear distribution and uniform distribution, and IASPA procedure was compared with nonlinear RHA procedures. The results indicate that the IASPA method provides more superior accuracy in estimating the seismic performance of bridge structures.更多还原