A QUASIBRITTLE MODEL FOR THE SERVTCE LIFE PREDICTION OF SELF-COMPACTING CONCRETE STRUCTURES
The time to surface cracking is a significant parameter for the design and assessment of reinforced self-compacting concrete structures located in marine environments.Concrete cracking incurs considerable costs of repairs and inconvenience to the public due to interruptions.This gives rise to the need for accurate prediction of the time to surface cracking in order to achieve cost-effectiveness in maintaining the serviceability of self-compacting concrete structures.It is in this regard that the present paper attempts to develop a quasibrittle mechanics model to predict the service life of chloride contaminated self-compacting concrete structures.Taking into account the softening characteristics of concrete,a partially cracked concrete cover was divided into two parts: elastic isotropic and clastic orthotropic.Based on this cracking model,an analytical solution was derived to the displacement and stress in the cover.The time to surface cracking was determined using the stress condition at the tip of the crack.Finally,the validation of the method was verified by comparing the solution with the experimental results.The effects of the cover depth,steel bar diameter and corrosion rate on the time to surface cracking were discussed.
J.J.Zheng X.Z.Zhou S.L.Xu
School of Civil Engineering and Architecture,Zhejiang University of Technology,China Department of Civil Engineering,Dalian University of Technology,China
国际会议
长沙
英文
549-556
2005-05-26（万方平台首次上网日期，不代表论文的发表时间）