幂函数剪切模量成层土非线性地震反应的半解析算法  

A semi-analytic method for nonlinear seismic response of layered foundations with power function shear modulus

作　　者：王春玲[1] 黄义[1] 曹彩芹[1] 

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《世界地震工程》2005年第2期85-89,共5页World Earthquake Engineering

基　　金：陕西省教育厅专项基金资助项目(04JK218)

摘　　要：运用文献[1]所建议的动态应力-应变关系及其推广的Masing加卸载准则,考虑土料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[2]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某一幂函数的成层非均质土层,建立了求解土体地震反应的非线性分析技术。针对文献[2]中的土层剖面,做了计算、分析和讨论。Dynamic constitutive relationship and the extended Masing's rules given in ref.[1] are applied to account for nonlinear hysteretic property of soil material under seismic or cyclic loadings. Incremental method and the general solution to linear seismic response of layered foundations with power function shear modulus are combined to develop a semi-analytic calculating technique for dynamic nonlinear problem of layered soils. Afterwards, a nonlinear analysis procedure is presented and numerically implemented for evaluating seismic response of the sorts of foundations. Based on numerical example for the problem given in ref.[2], analysis and discussion are performed.

关 键 词：剪切模量 非线性地震反应 幂函数 半解析算法 成层土 应力一应变关系 加卸载准则 非线性方程 非均质土层 滞回特征 加载条件 场地地震 时域算法 分析技术 不规则 解析解 增量法 剪切梁 文献 土体 

分 类 号：TU435[建筑科学—岩土工程] TU352.1[建筑科学—土工工程]