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.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
接触界面
黏结力
破坏形式
光贴片试验
数值模拟
interface
cohesion
damage state
photoelastic coatings test
numerical simulation
