A probabilistic investigation into deterioration of CFRP-concrete interface in aggressive environments

被引:15
作者
Kim, Yail J. [1 ]
Hossain, Mozahid [2 ]
Zhang, Jun [3 ]
机构
[1] Univ Colorado Denver, Dept Civil Engn, Denver, CO 80217 USA
[2] Univ S Carolina, Dept Civil & Environm Engn, Columbus, SC USA
[3] N Dakota State Univ, Dept Ind & Mfg Engn, Fargo, ND 58105 USA
基金
美国国家科学基金会;
关键词
Bond; Durability; Fiber reinforced polymer; Interface; Probability; FIBER-REINFORCED POLYMER; FRP; BOND; DURABILITY; RELIABILITY; CALIBRATION; COMPOSITES; DESIGN; MODELS;
D O I
10.1016/j.conbuildmat.2012.11.101
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper presents a probabilistic investigation into the deterioration of CFRP-concrete interface subjected to aggressive environments. A total of 53 single-lap shear specimens are exposed to freeze-wet-dry, wet-dry, and constant cold temperature conditions, 7 of which are unconditioned control specimens. Test parameters include the number of environmental cycles up to 150 and the degree of temperature as low as -30 degrees C for 2000 h. Upon completion of the planned environmental cycling, the residual capacity of the CFRP-interface (i.e., local interfacial fracture energy) is evaluated. The effect of freeze-wet-dry and constant cold temperature exposure is noticeable on the deterioration of the interface, whereas that of wet-dry is negligible. Probability distribution of the interfacial capacity is found to be normal and statistical uncertainty increases with the number of environmental cycles. Refined design factors are suggested using a Monte-Carlo simulation to ensure the sustainable performance of CFRP-retrofit systems for climatic regions with which freezing environment is associated. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:49 / 59
页数:11
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