THEORETICAL INVESTIGATION TO CRACKING PREDICTION OF EARLY-AGE CONCRETE

摘要：

This paper makes prediction of the crack of early-age concrete through crackingtest by anglicizing of shrinkage and creep,and propounds the method to Calculate the initialtoughness K ICINT and the corresponding open displacement of crack tip CTOD C INI of concrete. Onthe basis of fracture test,we can get the time-domain function of elastic modulus,initialtoughness and crack tip open displacement. With meliorating to influence of strength grade inshrinkage and creep model,this paper can get the time-domain function of shrinkage andcreep. Finally,instead of buckling strength,this paper using initial cracking strength to predictthe cracking of concrete in the aspect of strain.

关键词： early-age concrete initiation fracture toughness fracture mechanics strain cracking prediction

作者: Nanguo Jin Yi Bin Yong Zhao Xianyu Jin

作者单位: Department of Civil Engineering,Zhejiang University,Hangzhou 310027 PR China Nuclear Power Qinshan Joint Venture Corporation,Haiyan,314300,P.R.PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 810-816

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）