摘要
利用完全解耦的方法对适应谱Pushover分析方法(ASPA法)进行简化,提出了更适用于工程实际的改进适应谱Pushover分析方法(IASPA法)。利用IASPA法对4种典型地震动作用下的桥墩进行计算分析,并将计算结果与传统的Pushover分析方法以及非线性时程分析的结果进行对比研究;进而利用IASPA法和非线性时程分析方法分别对3个不同高度的桥墩进行分析,研究了高阶振型对不同高度桥墩抗震性能的影响。研究结果表明:随着桥墩高度的增加,高阶振型对桥墩抗震性能的影响变大;IASPA法由于考虑了高阶振型的影响,能够对高墩的抗震性能做出有效评估。
Adaptive spectra-based Pushover analysis （ASPA）method was simplified by using completely decoupled method. An improved adaptive spectra based Pushover analysis （IASPA） method which applied to engineering practice was presented. The pier was analyzed under four kinds of classical seismic effect and its result was compared with result calculated by traditional Pushover analysis method and nonlinear time history method respectively. Authors investigated three piers in different heights by the lASPA and nonlinear RHA. The influences of higher modes on seismic performance of the piers in different heights were studied. The results indicate that the influence of higher mode on seismic performance of bridge becomes greatly with increase of pier height. The IASPA method provides an effective estimate to seismic performance of higher piers because it considers the effects of higher modes.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2008年第5期57-62,共6页
China Journal of Highway and Transport
基金
国家自然科学基金项目(50678033)
