湛江海域结构性软土的边界面损伤模型研究  

Study on bounding surface damage model for structural soft soil in Zhanjiang sea area

作　　者：孙吉主[1] 王勇[1] 孔令伟[2] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]中国科学院武汉岩土力学研究所,武汉430070

出　　处：《岩土力学》2006年第1期99-101,106,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.40402024)资助研究

摘　　要：鉴于天然软土普遍具有结构性的特点,为了考虑软土结构性的逐渐破损过程,提出反映结构损伤的损伤参量。在边界面理论的弹塑性模量中直接引入损伤函数,建立结构性软土的边界面损伤模型,避免了在边界面方程中引入损伤变量带来的复杂性,易于在土工数值分析时采用。将理论预测与某海洋软土三轴排水与不排水剪切试验结果比较,显示了该模型的合理性。In view of the structural characteristics of natural soft soil, a damage parameter for reflecting structural disruption is proposed in order to consider a continuous structure damage process of soft soil. Damage function is introduced in elastic and plastic modulus expression of the bounding surface formulation directly; then a bounding surface damage model for structural soft soil is developed; the complication induced by introducing damage parameter into the bounding surface equation is avoided and its numerical implementation is easy for the analysis of earth structures. The theoretical predictions are compared with triaxial drained and undrained compression test results of a marine soft soil; it is shown that the model is reasonable.

关 键 词：结构性软土 损伤 边界面 

分 类 号：TU4[建筑科学—土工工程]