【摘要】 运用土动力学和结构动力学原理,基于改进的 Winkler 地基梁模型,同时考虑桩周土的弱化效应和地基的成层非均质性,采用数理方程方法分别求解土与桩的振动微分方程,建立了竖向荷载作用下单桩简谐动力响应分析的计算力学模型和方法,并将所得结果与有限元计算结果进行了对比分析,验证了建议计算方法的合理性,通过对影响单桩竖向简谐动力响应的各相关参数进行变动参数比较分析,得到了各影响参数对单桩竖向简谐动力响应特性的一般影响规律。更多还原

【Abstract】 Based on a certain assumptions and the improved dynamic beam-on-Winkler’s foundation model, a simplified analytic method for computing the vertical dynamic harmonic response of single pile embedded in nonhomogeneous soil layers are established by using the principle of soil dynamics and structural dynamics. Both nonhomogeneity of soil strata and softening effect of soil layers around pile are simultaneously taken into account in the proposed computational method. The comparative study on a numerical example shows that the dynamic response of single pile computed by the simplified analytic method are relatively rational and can well agree with the numerical results obtained by the well-known finite element program. Finally the parametric studies are made to examine the effects of main relevant parameters on dynamic response of single pile embedded in nonhomogeneous layered soils.更多还原