Modeling and Measurement of Sustained Loading and Temperature-Dependent Deformation of Carbon Fiber-Reinforced Polymer Bonded to Concrete

被引:9
作者
Jeong, Yoseok [1 ]
Lee, Jaeha [2 ]
Kim, WooSeok [1 ]
机构
[1] Chungnam Natl Univ, Dept Civil Engn, Taejon 305764, South Korea
[2] Korea Maritime & Ocean Univ, Dept Civil Engn, Pusan 606794, South Korea
基金
新加坡国家研究基金会;
关键词
FRP; BEHAVIOR; CREEP;
D O I
10.3390/ma8020435
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This paper aims at presenting the effects of short-term sustained load and temperature on time-dependent deformation of carbon fiber-reinforced polymer (CFRP) bonded to concrete and pull-off strength at room temperature after the sustained loading period. The approach involves experimental and numerical analysis. Single-lap shear specimens were used to evaluate temperature and short-term sustained loading effects on time-dependent behavior under sustained loading and debonding behavior under pull-off loading after a sustained loading period. The numerical model was parameterized with experiments on the concrete, FRP, and epoxy. Good correlation was seen between the numerical results and single-lap shear experiments. Sensitivity studies shed light on the influence of temperature, epoxy modulus, and epoxy thickness on the redistribution of interfacial shear stress during sustained loading. This investigation confirms the hypothesis that interfacial stress redistribution can occur due to sustained load and elevated temperature and its effect can be significant.
引用
收藏
页码:435 / 450
页数:16
相关论文
共 30 条
[1]  
ABAQUS, 2011, STAND US MAN VERS 6
[2]  
[Anonymous], 2007, ACH 41S COMP US TYF
[3]  
[Anonymous], 1994, FRACTURE MECH FUNDAM
[4]  
BAZANT ZP, 1977, J ENG MECH DIV-ASCE, V103, P1049
[5]  
Bazant ZP., 1988, MATH MODELING CREEP
[6]  
Bazant ZP., 1998, Fracture and size effect in concrete and other quasibrittle materials
[7]   THE VISCOELASTIC CONSTITUTIVE MODELING OF ADHESIVES [J].
BRINSON, HF .
COMPOSITES, 1982, 13 (04) :377-382
[8]  
Coronado CA, 2006, THESIS PENNSYLVANIA, P271
[9]   Damage approach for the prediction of debonding failure on concrete elements strengthened with FRP [J].
Coronado, Carlos A. ;
Lopez, Maria M. .
JOURNAL OF COMPOSITES FOR CONSTRUCTION, 2007, 11 (04) :391-400
[10]   Bond-Slip Model for FRP Laminates Externally Bonded to Concrete at Elevated Temperature [J].
Dai, Jian-Guo ;
Gao, W. Y. ;
Teng, J. G. .
JOURNAL OF COMPOSITES FOR CONSTRUCTION, 2013, 17 (02) :217-228