混凝土断裂过程区拉伸软化的本构关系  

Constitutive relation for tension softening of concrete in fracture process zone

作　　者：何敏[1] 张东焕[1] 王利民[1,2] 任鹏[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049 [2]青岛理工大学理学院,山东青岛266033

出　　处：《水利水电科技进展》2010年第4期8-12,共5页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(10272068);山东省自然科学基金(Y2006A29)

摘　　要：针对混凝土在裂纹端部的断裂过程区应力和变形具有软化特性这一情况,将该过程区抽象为具有黏聚应力分布的裂纹,通过确定黏聚裂纹张开位移和黏聚应力分布的计算式,将其应用于混凝土材料,得到该材料的黏聚裂纹张开位移的分布及张开位移与应力的本构关系。理论计算值与试验结果吻合良好。The stress and deformation of concrete have typical softening characteristics along the fracture process zone at the crack tip.The fracture process zone was regarded as a crack with distribution of cohesive stress.The formulae for the opening displacement of cohesive crack and the distribution of cohesive stress were determined and applied to concrete materials.The constitutive relation between the cohesive stress and crack opening displacement and the distribution of opening displacement were obtained.The calculated values agree with the experimental results.

关 键 词：混凝土 黏聚裂纹 张开位移 黏聚应力 

分 类 号：TU31[建筑科学—结构工程] TU528.1