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Shear strength of normal strength concrete beams reinforced with deformed GFRP bars

Yost, J.R. / Gross, S.P. / Dinehart, D.W.

This paper evaluates the shear strength, V_c, of intermediate length (2.5 < a/d < 6) simply supported concrete beams subjected to four-point monotonic loading and reinforced with deformed, glass fiber-reinforced polymer (GFRP) reinforcement bars. Six different overreinforced GFRP designs, rho > rho_b, were tested with three replicate beams per design. All samples failed as a result of diagonal-tension shear. Measured shear strengths at failure are compared with theoretical predictions calculated according to traditional steel-reinforced concrete procedures and recently published expressions intended for beams reinforced with GFRP. Recommendations are made regarding the adequacy of shear strength prediction equations for GFRP-reinforced members. The study concludes that shear capacity is significantly overestimated by the 'Building Code Requirements for Structural Concrete and Commentary' (ACI 318-99) expression for, V_c, as a result of the large crack widths, small compression block, and reduced dowel action in GFRP-reinforced flexural members. Shear strength was found to be independent of the amount of longitudinal GFRP reinforcement. A simplified empirical equation for predicting the ultimate shear strength of concrete beams reinforced with GFRP is endorsed.

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Shear strength of normal strength concrete beams reinforced with deformed GFRP bars

Yost, J.R. / Gross, S.P. / Dinehart, D.W.

This paper evaluates the shear strength, V_c, of intermediate length (2.5 < a/d < 6) simply supported concrete beams subjected to four-point monotonic loading and reinforced with deformed, glass fiber-reinforced polymer (GFRP) reinforcement bars. Six different overreinforced GFRP designs, rho > rho_b, were tested with three replicate beams per design. All samples failed as a result of diagonal-tension shear. Measured shear strengths at failure are compared with theoretical predictions calculated according to traditional steel-reinforced concrete procedures and recently published expressions intended for beams reinforced with GFRP. Recommendations are made regarding the adequacy of shear strength prediction equations for GFRP-reinforced members. The study concludes that shear capacity is significantly overestimated by the 'Building Code Requirements for Structural Concrete and Commentary' (ACI 318-99) expression for, V_c, as a result of the large crack widths, small compression block, and reduced dowel action in GFRP-reinforced flexural members. Shear strength was found to be independent of the amount of longitudinal GFRP reinforcement. A simplified empirical equation for predicting the ultimate shear strength of concrete beams reinforced with GFRP is endorsed.

Shear strength of normal strength concrete beams reinforced with deformed GFRP bars

Yost, J.R. / Gross, S.P. / Dinehart, D.W.

This paper evaluates the shear strength, V_c, of intermediate length (2.5 < a/d < 6) simply supported concrete beams subjected to four-point monotonic loading and reinforced with deformed, glass fiber-reinforced polymer (GFRP) reinforcement bars. Six different overreinforced GFRP designs, rho > rho_b, were tested with three replicate beams per design. All samples failed as a result of diagonal-tension shear. Measured shear strengths at failure are compared with theoretical predictions calculated according to traditional steel-reinforced concrete procedures and recently published expressions intended for beams reinforced with GFRP. Recommendations are made regarding the adequacy of shear strength prediction equations for GFRP-reinforced members. The study concludes that shear capacity is significantly overestimated by the 'Building Code Requirements for Structural Concrete and Commentary' (ACI 318-99) expression for, V_c, as a result of the large crack widths, small compression block, and reduced dowel action in GFRP-reinforced flexural members. Shear strength was found to be independent of the amount of longitudinal GFRP reinforcement. A simplified empirical equation for predicting the ultimate shear strength of concrete beams reinforced with GFRP is endorsed.

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Title:

Shear strength of normal strength concrete beams reinforced with deformed GFRP bars

Additional title:

Scherfestigkeit von mit deformierten, glasfaserverstärkten Kunststoffstäben armierten Betonträgern normaler Festigkeit

Contributors:

Yost, J.R. (author) / Gross, S.P. (author) / Dinehart, D.W. (author)

Published in:

Journal of Composites for Construction ; 5 ; 268-275

Publication date:

2001

Size:

8 Seiten, 7 Bilder, 3 Tabellen, 26 Quellen

ISSN:

DOI:

https://doi.org/10.1061/(ASCE)1090-0268(2001)5:4(268)

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Träger (Bauwesen) , Beton , Armierung , Stab , glasfaserverstärkter Kunststoff , Vinylharz , ungesättigtes Polyesterharz , Scherfestigkeit , Versagensart , mechanische Prüfung , Stahlbeton , Produktvergleich , Verformung , Gleichung (Mathematik)

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