含黏粒砂土的循环弹塑性本构模型及其动力数值研究  

Cyclic Elastoplastic Constitutive Model of Clayey Sand and its Dynamic Numerical Analysis

作　　者：白旭[1,2] 唐小微[1,2] 刘文化[1,2] 张西文[1,2] 胡记磊[1,2] 李彬[1,2] 

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116023 [2]大连理工大学建设工程学部土木工程学院岩土工程研究所,辽宁大连116023

出　　处：《地震工程学报》2014年第3期516-524,共9页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51078062);国家重点基础研究发展计划973课题项目(2011CB013605-2)

摘　　要：首先完善上下负荷面中超固结状态参量R与结构性状态参量R*的定义表达,并以此重新推导了应力诱导各向异性上下负荷面模型,并在数值程序中再现该模型,实现土的统一本构的数值化模拟。分析了黏土以及砂土的力学特性,及其在数值模型状态变量中的差异,为模拟含黏粒砂土的实现进行理论分析。通过参数试算找出含黏粒砂土的不同黏粒含量分别所对应的模型参数。The definitions of overconsolidation state parameter R and structural property state pa-rameter R ＊ are perfected,and a new derivation of the super/subloading yield surface model is of-fered based on these definitions.The numerical implementation based on this unified constitutive model is compiled,and the simulation is carried out.The mechanical characteristics of clay and sand and the differences between their state parameters are analyzed.The numerical implementa-tion of clayey sand is then simulated based on the theoretical analysis.To find the correspondence between the numerical parameters and the clay content,simulations of clayey sand with varying parameters are carried out.

关 键 词：含黏粒砂土 上下负荷面 超固结土 结构性土 应力诱导各向异性 液化 

分 类 号：TU43[建筑科学—岩土工程]