THE LIFE-SPAN PREDICTION OF REINFORCED CONCRETE CORROSION CRACKING BASED ON DUAL-G FRACTURE CRITERION
(0) The dual-G fracture criterion describes initiation,stable propagation and unstablepropagation of cracks related to concrete structures. The corresponding dual-G fractureparameters(i.e.,initial cracking toughness and unstable fracture toughness)introduced in thecriterion are established by using a simple experiment method combining with an analyticalevaluation based on the cohesive force on the fictitious crack zone. The crack propagationprocess due to corrosion expansion of reinforced concrete is consist of three stages: these are,crack initiation,stable crack propagation and unstable fracture. Based on corrosive expansionforce of reinforced concrete members in reference Ill,the formula of strain energy releaserate G for crack propagation about corroded reinforced concrete members is presented byfracture mechanics approaches. The duaI-G fracture criterion which is applied on theprediction of crack propagation life-span of corroded reinforced concrete,and the factorsaffected crack propagation life-span,such as the grade of concrete strength,the depth ofconcrete cover and the rebar diameter,have been investigated in detail in this paper. Theresults will shell some lights on the analysis and design of durability of reinforced concretestructures.
reinforced concrete dual-G criterion energy release rate corrosion cracking service life-span durability
LIU Chun-cheng SHI Lei XU Jian YANG Jie
School of Civil and Architecture Engineering,North-east Dianli University,PR China;School of Civil a School of Civil and Hydraulic Engineering,Dalian University of Technology,PR China School of Civil and Architecture Engineering,North-east Dianli University,PR China
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
977-984
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）