两介质接触处光弹性贴片试验及数值模拟研究  

Photoelastic Method and Numerical Simulation of the Interface Between Bi-material Specimen

作　　者：易成[1] 刘晋艳[2] 王长军[2] 李志兵[2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学力学与建筑工程学院,北京100083

出　　处：《中国矿业大学学报》2008年第4期450-455,共6页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2002CB412707);教育部重大基金项目(305013);高等学校博士学科点专项科研基金项目(20040610095)

摘　　要：为了研究界面黏结力对两介质接触面力学性能的影响,用砂浆和混凝土构造了宽度方向一致的规则接触面模拟工程体和地质体的相互作用.采用压剪荷载下的光弹性贴片试验以及有限元数值模拟分析了一体两介质和两体两介质试件的破坏状态和应变场分布.结果表明:界面黏结力对两介质接触面的力学性能有很大的影响;低强度介质与高强度介质的强度之比是影响两介质试件剪切力学行为和破坏模式的重要参量;试验和模拟结果相吻合.The effect of cohesion on the mechanical response at the interface between dissimilar materials was studied. Specimens with the same width were constructed of mortar and concrete. The interaction of the structure and geologic bodies was simulated. Actual specimens were compression-shear-loaded and the strain distribution and damage profile were recorded. A photo-elastic coating was used to help visualize the strain in the test parts. The results show that cohesion has a great effect on the mechanical behavior at the interface. An important pa- rameter that affects the shear properties and the failure modes of the bi-material specimens is the strength ratio of the two materials of construction. The numerical simulations agree with the photoelastic measurements.

关 键 词：接触界面 黏结力 破坏形式 光贴片试验 数值模拟 

分 类 号：TU458.4[建筑科学—岩土工程]