纤维增强混凝土材料的界面剪应力分布研究  

SHEAR STRESS DISTRIBUTION OF FIBER-CONCRETE INTERFACE FOR FIBER REINFORCED CONCRETE MATERIALS

作　　者：李丽娟[1] 张红州[1] 刘锋[1] 

机构地区：[1]广东工业大学建设学院,广州510006

出　　处：《固体力学学报》2006年第4期418-424,共7页Chinese Journal of Solid Mechanics

基　　金：广东省科技计划项目(C11301);广东省自然科学基金(010025);广州市科技计划项目(2005Z-D0201)资助

摘　　要：针对纤维与混凝土界面的破坏过程,提出了几种简化的粘结-滑移本构模型,以双线性局部粘结-滑移本构模型为基础,在受力平衡和变形协调的基本原理基础上,推导了纤维脱粘过程中界面剪应力的解析解.采用弹簧粘结单元,通过数值方法模拟了纤维与混凝土之间的粘结-滑移过程,给出了纤维与混凝土界面脱粘过程中界面剪应力的分布、变化情况.对解析解、有限元计算结果和试验结果之间的差异进行了对比分析,验证了简化模型的合理性和有效性.Based on the fracture process between the fiber and concrete,this paper presented several simplified bonding-slipping constitutive models. The analytical solutions to interface shear stresses during debonding were deduced based on a bilinear local bonding slipping constitutive model, the principle of stress equilibrium and deformation compatibility. Bilinear local bonding-slipping constitutive model and spring bonding element were used to simulate bonding-slipping processes between the fiber and concrete. The distribution of shear stress, stress variation of debonding process were presented. Comparation among analytical solutions,simulation results and experiment results proved that the simplified models produced in this paper were practical and feasible.

关 键 词：纤维混凝土 界面 粘结-滑移模型 粘结单元 

分 类 号：TU528.572[建筑科学—建筑技术科学]