新老混凝土粘结面断裂损伤过程区研究  

STUDY OF THE FRACTURE PROCESS ZONE OF ADHESIVE INTERFACE OF NEW AND OLD CONCRETE

作　　者：韩菊红 [1] 赵国藩 [2] 张雷顺 [3] 

机构地区：[1]郑州大学环境与水利学院,河南,郑州,450002,大连理工大学海岸与近海工程国家重点试验室,辽宁,大连,116023 [2]大连理工大学海岸与近海工程国家重点试验室,辽宁,大连,116023 [3]郑州大学环境与水利学院,河南,郑州,450002

出　　处：《工程力学》2004年第6期31-35,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(59778045);国家攀登计划 B(课题编号:5.2)

摘　　要：在新老混凝土粘结面断裂性能试验的基础上,建立了新老混凝土粘结面断裂破坏模式,分析讨论了界面层特性及界面微裂缝扩展对新老混凝土粘结面断裂性能的影响.建立了新老混凝土粘结面带状微裂缝断裂过程区模型,根据该模型可求出断裂过程区尺寸.结合裂缝过程区的荷载~应变试验结果,用临界断裂韧度对新老混凝土粘结断裂韧度进行了断裂过程区影响修正.Based on the adhesive fracture test results of new and old concrete , a toughness model of adhesive interface of new and old concrete is put forward. The characteristic and influence of interfacial micro-crack process of new and old concrete on adhesive fracture toughness is discussed. A banded micro-crack fracture process zone model of adherence of new and old concrete is built up, and the fracture process zone size is obtained by using the banded micro-crack fracture process zone model. Combined with the load-strain test result, the influence of fracture process zone on adhesive fracture toughness is modified by using the critical fracture toughness.

关 键 词：混凝土 粘结面 断裂 微裂缝过程区 临界断裂韧度 

分 类 号：TU377[建筑科学—结构工程]