DURABILITY-BASED TIME-DEPENDENT RELIABILITY DESIGN FOR FRP-STRENGTHENED CONCRETE BEAMS
Durability-based probabilistic design methodology for FRP-strengthened reinforcedconcrete beams was conceptually established by reliability theory and the considerations oftime-dependent material properties. The limit state functions were developed both forunstrengthened and strengthened concrete beams. The Rackwitz-Fiessler method combinedwith the Monte Carlo procedure was applied to the analysis of an example. The analyticalresults have revealed that the instants to initiation of chloride-induced corrosion and corrosion-induced cracking are subjected to a large scatter due to significant variances exist in concretecover,surface chloride concentration,critical chloride concentration,chloride diffusioncoefficient and aging factor. If aging time is greater than the instant to initiation of corrosion-induced cracking,reliability indexes would decrease almost linearly as increasing time. Bythe results,it can be concluded that bonding FRP laminates externally to the surface ofreinforced concrete beams can significantly increa~se not only their flexural resistances butalso reliability levels,even under adverse chloride-ingress exposure conditions.
fiber reinforced polymer laminate durability reinforced concrete beam time-dependent reliability flexure
Z. He Q. Sun X. M. Li
College of Resources and Civil Engineering,Northeastern University,PR China School of Civil Engineering,Harbin Institute of Technology,PR China China Jing Ye Engineering Corporation Ltd.Beijing,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
1096-1102
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）