线性剪切模量非均质地基非线性地震反应分析

An analytic method for nonlinear seismic response of foundations with linear function shear modulus

利用动态应力-应变关系及其推广的Masing加卸载准则,考虑土体在地震等产生的不规则加载条件下的非线性滞回特征,将增量法与相应场地地震线性反应解析解相结合,提出了该动力非线性方程的半解析时域算法,基于改进的一维剪切梁模型,对剪切模量是其深度的线性函数的非均质地基,建立了求解土体地震反应的非线性分析技术.

Dynamic constitutive relationship given in the literature together with the extended Masing rules, is employed to account for the nonlinear hysteretic property of soil material under transient or cyclic loadings. Incremental method and the general solution to linear seismic response of vertically non-homogeneous foundations with linear function shear modulus are combined to develop a sesimi-analytic calculating technique for dynamic nonlinear problem. Afterwards, a truly nonlinear analysis procedure is presented and numerically implemented for evaluating seismic response of this sort of foundations. Based on the numerical computations for the problem, analysis and discussion are performed.