扰动状态概念方法的参数标定及应用初探  

Parameter Calibration and Preliminary Utilization of Disturbed State Concept(DSC) Method

作　　者：郑建业[1] 葛修润[1] 蒋宇[1] 卢允德[1] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200240

出　　处：《上海交通大学学报》2004年第6期972-975,共4页Journal of Shanghai Jiaotong University

摘　　要：扰动状态概念为工程材料提供统一的本构关系模拟方法.当材料受荷时,其响应是由处于相对完整状态下和处于完全调节状态下的材料响应以一个加权函数组合起来,构成材料的真实响应.响应和扰动因子是相互关联的,需要用直接迭代法求解.解决工程问题时,可以选择简单的参考状态,并用拟合岩石单轴受压的全过程应力应变关系曲线确定扰动因子的参数.该方法在描述材料软化阶段时效果会更好.Disturbed state concept (DSC) provides a general constitutive modeling method for engineering materials. The behavior of material subjected to loadings is a weighted average of two reference reaction states; it is comprised of relative intact state and fully adjusted state with a weight function. Stress, strain and disturb factor are dependent mutually, thus a direct iterative method is proposed to evaluate the material's response under loadings. Simple reference states can be used to solve engineering problem. Through simulating the overall curvature of rock's stress-strain relationship under uniaxial compression, parameters are attained. The DSC shows efficiency for describing material's softening phase characters.

关 键 词：扰动状态概念 本构关系 岩石单轴受压试验 参数标定 

分 类 号：TU452[建筑科学—岩土工程]