碾压混凝土断裂性能的尺寸效应研究  

作　　者：赵琳[1] 

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《科技创新与应用》2021年第16期72-74,共3页Technology Innovation and Application

摘　　要：文章采用了缝高比为0.4的5种尺寸的楔入劈拉试件进行试验并得出碾压混凝土的双K断裂参数值。由试验结果分析可得:碾压混凝土试件高度小于300mm时,其起裂韧度和失稳韧度会随试件高度增大而略有增加;当碾压混凝土试件高度大于300mm时,其起裂韧度和失稳韧度基本稳定,尺寸效应消失。Five kinds of wedge specimens with a crack-depth ratio of 0.4 were used to test to get the double K fracture parameter of the roller compacted concrete(RCC).According to the experimental data,it was indicated that when the concrete specimen size is less than 300 mm,the initial fracture toughness and the unstable fracture toughness of the RCC specimen will increase with the height;when the size of the test piece is greater than or equal to 300 mm,the initial fracture toughness and the unstable fracture toughness of the specimen keep stable,with the size effect disappearing.

关 键 词：碾压混凝土 双K断裂模型 试件尺寸 断裂 

分 类 号：TV33[水利工程—水工结构工程]