粉质黏土-混凝土界面剪切特性研究  

STUDY ON SHEAR CHARACTERISTICS OF SILTY CLAY-CONCRETE INTERFACE

作　　者：路伟亚 王吉良[2] 李祥飞 LU Weiya;WANG Jiliang;LI Xiangfei(School of Hydraulic and Electric-Power,Heilongjiang University,Harbin 150080,China;Heilongjiang Province Academy of Cold Area Building Research,Harbin 150080,China)

机构地区：[1]黑龙江大学水利电力学院,哈尔滨150080 [2]黑龙江省寒地建筑科学研究院,哈尔滨150080

出　　处：《低温建筑技术》2023年第5期17-20,25,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金(41971076);黑龙江省重点研发计划项目(GA21A501)。

摘　　要：文中通过开展混凝土与粉质黏土接触面的直剪试验和数值模拟,分析了干密度和法向应力对粉质黏土-混凝土界面剪切特性的影响。试验结果表明,粉质黏土-混凝土接触面的黏聚力、内摩擦角和抗剪强度均受土体初始干密度的影响;接触面的抗剪强度与法向应力存在较强的线性关系且接触面的剪切破坏形势符合Mohr-Coulomb破坏准则;通过对试验的数值模拟发现Clough-Duncan接触面模型能够较好的模拟接触面的剪切应力-位移关系。为工程中进一步研究结构物与土体界面的力学特性提供了参考。The effectiveness of dry density and normal stress on the shear characteristics of silty clay-concrete inter-face are analyzed by direct shear tests and numerical simulations of the contact surface between concrete and silty clay.The results show that the cohesion,internal friction angle,and shear strength of the silty clay-concrete inter-face are affected by the initial dry density of the soil.There is a linear relationship between the shear strength of the contact surface and the normal stress,and the shear failure of the contact surface conforms to the Mohr-Coulomb fail-ure criterion.Through the numerical simulation,it is found that the Clough-Duncan contact surface model can better simulate the shear stress-displacement relationship of the contact surface.It may provide the reference for further study of the mechanical properties of the interface between structure and soil in engineering.

关 键 词：接触面直剪试验 界面剪切特性 数值模拟 Clough-Duncan接触面模型 

分 类 号：TU502[建筑科学—建筑技术科学]