【摘要】 通过模拟土的非线性动力本构模型,选取合理的人工边界及耦合阻尼模型,建立了刚性桩复合地基与上部结构相互作用体系三维有限元动力分析模型。通过计算,对比了刚性桩复合地基与普通桩基对上部结构地震反应的影响异同,同时得到了土体模量与分层、基础埋深、桩径与桩长、砂石垫层模量与厚度以及上部结构特性等因素在考虑土-结构动力相互作用时对刚性桩复合地基抗震性能的影响及其基本规律,并与已有相关试验结果进行了对比,得到较好验证。研究结果为工程设计与工程应用提供了可借鉴的理论依据。更多还原

【Abstract】 Through considering nonlinear dynamic soil model, reasonable artificial-boundary and coupling damping model, a 3-D finite element dynamic model of rigid pile composite foundation-superstructure interaction system, is established. Through calculations the different seismic responses of the structure with rigid pile composite foundation and with common pile foundation are compared. At the same time, the influential factors and aseismic capability for rigid pile composite foundation is studied by considering soil modulus and soil layer, embedment depth, pile length and pile diameter, sand-gravel cushion thickness and modulus, structure characteristic, etc. All the results and conclusions will provide theoretical basis for engineering design and practice.更多还原