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土与混凝土接触面反向剪切单剪试验
引用本文:王伟,卢廷浩,宰金珉,孙斌祥.土与混凝土接触面反向剪切单剪试验[J].岩土力学,2009,30(5):1303-1306.
作者姓名:王伟  卢廷浩  宰金珉  孙斌祥
作者单位:1. 绍兴文理学院,土木工程系,浙江,绍兴,312000;河海大学,岩土所,南京,210098
2. 河海大学,岩土所,南京,210098
3. 南京工业大学,岩土所,南京,210009
4. 绍兴文理学院,土木工程系,浙江,绍兴,312000
基金项目:国家自然科学基金,浙江省自然科学基金,浙江省高校中青年教师资助计划项目,浙江省教育厅科学研究项目 
摘    要:土与混凝土接触面的力学行为是土与结构共同作用研究中的一个主要课题。进行了17 %、20 %、24 %共3组含水率的土与混凝土接触面正反向单剪试验,每组试验分别考虑5个法向应力和4个正向剪切比。试验结果表明,在正向剪切比和含水率一定时,接触面反向剪切破坏仍遵循摩尔-库仑破坏准则。当正向剪切比为0.50、0.75、1.00时,对应反向剪切强度分别为各自正向初始强度的90 %、75 %、55 %,对应的反向剪切黏聚力约为初始正向剪切黏聚力的95 %、80 %、54 %,反向剪切摩擦角约为初始正向剪切摩擦角的90 %、76 %、57 %。试验结果可供相关工程数值分析参考。

关 键 词:土与混凝土接触面  剪切试验  反向剪切  含水率  摩擦角  黏聚力
收稿时间:2007-09-14

Negative shear test on soil-concrete interface using simple shear apparatus
WANG Wei,LU Ting-hao,ZAI Jin-min,SUN Bin-xiang.Negative shear test on soil-concrete interface using simple shear apparatus[J].Rock and Soil Mechanics,2009,30(5):1303-1306.
Authors:WANG Wei  LU Ting-hao  ZAI Jin-min  SUN Bin-xiang
Institution:1. Department of Civil Engineering, Shaoxing College of Art and Science, Shaoxing 312000, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 3. Research Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China
Abstract:Mechanical behavior of soil-concrete interface is essential to soil-structure interaction; and it is necessary to understand it properly during numerical simulation. Negative shear tests using laboratory simple shear apparatus are performed on soil-concrete interfaces with three water contents, namely 17 %, 20 %, and 24 %. Five normal stresses and four previous shear ratios are taken into accounted in each water content. Experimental data show that while water content and previous shear ratio are fixed, failure of negative sheared interfaces still satisfy the Mohr-Coulomb criterion. After experiencing shear with 0.5, 0.75 and 1.0 previous shear ratio, shear strengths of the negative sheared interfaces become 90 %, 75 % and 55 % of those of original interfaces respectively. At the same time, cohesion forces of the negative sheared interfaces become 95 %, 80 % and 54 % of those of original interfaces, and friction angles of the negative sheared interfaces become 90 %, 76 % and 57 % of those of original interfaces respectively. This experimental research is useful for relative engineering numerical simulation.
Keywords:soil-concrete interface  shear test  negative shear  water content  friction angle  cohesion force
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