【摘要】 传统桩基础结构抗震设计中一般认为忽略结构与桩基础相互作用影响使得结构所受惯性作用计算结果偏于保守,但对几次强震中地震动反应谱和桩基础结构震害特征的总结与分析表明,液化作用和结构与桩基础相互作用可能导致桩基础结构惯性作用增强。通过可液化地基中桩基础结构的动力离心模型试验手段,分析了地基液化对结构与桩惯性相互作用的影响,发展了适用于表层液化地基中的结构与桩惯性相互作用的简化计算方法,并利用该方法对文中及Wilson等的离心模型试验进行分析,得到的结构加速度与试验结果吻合较好,从而验证了方法的有效性。更多还原

【Abstract】 Traditional pile-based structure design methods imply that by neglecting the effect of soil-structure interaction in dynamic analysis;the obtained results tend to be conservative;but seismic response spectra analysis and pile structure failures during recent catastrophic earthquakes have indicated that liquefaction and soil-pile-structure interaction could in fact lead to an increase in the inertial response of structures on pile foundation.Through analysis of the influence of ground liquefaction on structure-pile inertial interaction using dynamic centrifuge model experiments,a simplified analysis method for the computation of pile based structure inertial response in ground with a liquefied top layer was proposed and used to analyze model experiments described in this paper and by Wilson et al.;computation results show good agreement with experiment results,which demonstrates the effectiveness of the proposed method.更多还原