A Recalibration of the Crack Width Bond-Dependent Coefficient for GFRP-Reinforced Concrete

被引：21
作者：
Shield, Carol [1 ]
Brown, Vicki [2 ]
Bakis, Charles E. [3 ]
Gross, Shawn [4 ]
机构：
[1] Univ Minnesota, Dept Civil Environm & Geo Engn, Minneapolis, MN 55455 USA
[2] Widener Univ, Dept Civil Engn, One Univ Pl, Chester, PA 19013 USA
[3] Penn State Univ, Dept Engn Sci & Mech, Engn Sci & Mech, 212 Earth Engn Sci Bldg, University Pk, PA 16802 USA
[4] Villanova Univ, Dept Civil & Environm Engn, 139 Tolentine Hall,800 Lancaster Ave, Villanova, PA 19085 USA
来源：
JOURNAL OF COMPOSITES FOR CONSTRUCTION | 2019年 / 23卷 / 04期
关键词：
FLEXURAL BEHAVIOR; SERVICEABILITY; STRENGTH;
D O I：
10.1061/(ASCE)CC.1943-5614.0000978
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Serviceability requirements can often control the design of glass fiber-reinforced polymer (GFRP)-reinforced concrete flexural members due to the lower stiffness of GFRP than of steel. ACI Committee 440 crack control provisions for GFRP-reinforced concrete mimic those from ACI 318 for steel-reinforced concrete, but with the addition of a bond-dependent coefficient, kb, to account for differences in bond between GFRP and concrete from steel and concrete. The recommended value for the bond-dependent coefficient in ACI 440.1R-15 is 1.4. This value is largely based on one experimental study, with one type of GFRP bar. Since that study, many more experiments have been performed to examine crack widths in GFRP-reinforced concrete. A database of these experiments that satisfy a rigorous set of criteria to ensure valid experimental results was created from the literature and used to recalibrate the bond-dependent coefficient. A value of 1.2 is recommended for all bars that include a sand coating in the surface enhancement. A value of 1.4 is recommended for all other bars.
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页数：8
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