带裂纹碾压混凝土层面强度尺寸和边界效应  

Size and boundary effect on interfacial strength of RCC with pre-embedded crack

作　　者：张小刚[1,2] 王学志[3] 孙荣书[3] 吴智敏[4] 

机构地区：[1]深圳大学土木工程学院,广东深圳518060 [2]深圳大学深圳市土木工程耐久性重点实验室,广东深圳518060 [3]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [4]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2009年第1期115-120,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50709013);深圳市科技计划资助项目(QK200601);深圳大学科研启动基金资助项目(200603);深圳市土木工程耐久性重点实验室开放基金资助项目(CED08-11)

摘　　要：研究了碾压混凝土层面中带不同削弱度裂纹时远场强度的尺寸和边界效应,指出对强度影响的不仅仅是试件尺寸,也包括试件边界、裂纹长度和裂纹数量等因素.应用界面断裂力学理论和混凝土Ⅰ-Ⅱ复合型断裂准则,对Hu和Wittmann的强度效应律做了理论上的扩展,使之符合碾压层面抗拉强度的断裂特性;最后建立了碾压混凝土层面强度的尺寸与边界效应回归曲线.The size （RCC） with pre-em that, the size and b influence factors in and boundary effect o bedded cracks, which oundary of specimen, interfacial strength of n far field interfacial strength of rolled compacted concrete had different weakening degrees, was studied. It is found as well as the length of Ⅰ -Ⅱ cracks and its number are the RCC. Based on the theory of interfacial fracture mechanics and the criteria of compound fracture, Hu and Wittmann＇s fracture mechanics formula of size effect is extended to adapt the mixed fracture characteristics of interface of RCC. And the curves of size and boundary effect on far field interfacial strength of RCC are established.

关 键 词：碾压混凝土层面 远场强度 尺寸和边界效应 复合型断裂准则 预制裂纹 

分 类 号：TV313[水利工程—水工结构工程]