【摘要】 研究了框架结构与桩基刚度比改变对结构和桩基的水平地震响应的影响以及刚度比的合理取值区间。建立了桩-土-框架结构动力相互作用的三维整体有限元分析模型,分析了框架结构与桩基不同的刚度比对桩-土-框架结构水平地震响应的影响,绘制出桩基和框架结构的最大水平地震位移响应相对于刚度比的曲线,得到桩基和框架结构的最大水平地震位移响应相对于刚度比的变化规律。最后得到框架结构与桩基刚度比合理的取值区间为[0.15,0.24]的结论,同时指出存在最优刚度比。更多还原

【Abstract】 The influence on horizontal seismic response from variable stiffness ratio between frame structure and piles and the reasonable range of the stiffness ratio value are studied.3D whole finite element analysis model of the pile-soil-frame structure dynamic interaction is established.The influence on the horizontal seismic response of the pile-soil-frame structure from variable stiffness ratio between the frame structure and the piles is analyzed.The curves of the piles and the frame structure maximal horizontal seismic response relative to stiffness ratio are plotted.The orders of the piles and the frame structures maximal horizontal seismic response relative to stiffness ratio are obtained.The reasonable range of the stiffness ratio value between frame structure and piles is [0.15,0.24] according to the orders,indicating the existence of the optimum of the stiffness ratio.更多还原