接触面直剪试验及数值模拟分析  

Experimental and numerical study on interface direct shear tests

作　　者：殷殷 张丙印[1] 袁会娜[1] 孙逊[1] YIN Yin;ZHANG Bingyin;YUAN Huinal;SUN Xun(State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084;Chinese Institute of Water Resources and Hydropower Research, Beijing 100038)

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]中国水利水电科学研究院,北京100038

出　　处：《水力发电学报》2018年第6期84-92,共9页Journal of Hydroelectric Engineering

基　　金：国家重点研发计划(2017YFC0404802);国家自然科学基金(51479099;51379103)

摘　　要：土体与结构的接触面广泛存在于各种岩土工程之中,建立可合理描述其变形特性的接触面本构模型至关重要。分别进行了糯扎渡反滤料I–混凝土底板接触面直剪试验和模拟该试验的有限元数值计算,分析了接触面直剪试验中的剪切变形和渐进破坏特性。研究结果表明,接触面直剪试验不是单元体试验,接触面破坏是一个渐进破坏的过程。接触面试验中量测的位移包括了接触面上的剪切位移和接触面附近土体的变形两部分。在有限元计算分析中,前者可采用刚塑性模型计算和反映,后者可通过土体的一般本构模型来计算和描述。The interface of soil and structure exists widely in geotechnical engineering, and it is essential to establish a constitutive model that can describe the deformation properties of interface reasonably. In this study, direct shear tests on the interface of ‘Nuozhadu filter material-concrete baseplate＇ were conducted and then simulated using the finite element method（FEM） to analyze the properties of shear deformation and progressive failure of the interface. Results show that the failure of soil-structure interface, which is significantly different from that of a soil or structure element, manifests a progressive process. The measured displacement in the test consists of two parts, i.e., the shear displacement at the interface and the deformation of the soil adjacent to the interface. In FEM analyses, the former can be simulated appropriately by a perfectly plastic model, and the latter by conventional constitutive models of soil.

关 键 词：接触面 直剪试验 Clough-Duncan接触面模型 刚塑性接触面模型 

分 类 号：TV641[水利工程—水利水电工程]