TRC与老混凝土界面黏结力破坏模型  

Failure Model of Bond Force between TRC and Old Concrete

作　　者：尹世平[1,2,3] 赵璐 李鹏昊 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116 [3]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《湖南大学学报（自然科学版）》2018年第1期77-83,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51478458)~~

摘　　要：采用双面剪切的试验方式研究了纤维编织网增强混凝土(Textile Reinforced Concrete,TRC)与老混凝土界面性能.依据塑性力学极限分析理论以及新老混凝土界面模型,修正了TRC与老混凝土界面模型,推导了常规环境下二者界面最大黏结力的理论计算公式.在此基础上,根据不同氯盐干湿循环次数影响下二者界面黏结力的试验值,拟合得到环境影响系数.据此推导了氯盐干湿循环下TRC与老混凝土界面黏结力的理论计算公式.通过对比理论计算值与试验值的相对误差,检验了理论模型及计算公式的正确性.The interracial properties between textile reinforced concrete （TRC） and existing concrete were studied by double-side shear tests. Based on the plasticity limit analysis theory and the interface model between new and old concrete,the interface model of TRC and conventional concrete was modified, and the theoretical calculation formula of maximum cohesive force between their interfaces under the conventional environment was derived. Subsequently, according to the experimental results of the interracial bond strength between their interfaces under the effect of different number of sodium chloride solution wet-dry cycles, the environmental impact coefficient was fitted. The theoretical calculation formula of the bond strength between the TRC and conventional concrete under wet-dry cycle was then derived. By comparing the relative error between theoretical and experimental results, the correctness of the theoretical model and calculation formula were verified.

关 键 词：纤维编织网增强混凝土(TRC) 界面性能 界面模型 氯盐干湿循环 劣化 环境影响系数 

分 类 号：TU528.572[建筑科学—建筑技术科学]