TY - JOUR
T1 - A Recalibration of the Crack Width Bond-Dependent Coefficient for GFRP-Reinforced Concrete
AU - Shield, Carol
AU - Brown, Vicki
AU - Bakis, Charles E.
AU - Gross, Shawn
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85065239159&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065239159&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)CC.1943-5614.0000978
DO - 10.1061/(ASCE)CC.1943-5614.0000978
M3 - Article
AN - SCOPUS:85065239159
VL - 23
JO - Journal of Composites for Construction
JF - Journal of Composites for Construction
SN - 1090-0268
IS - 4
M1 - 04019020
ER -