TY - JOUR
T1 - Experimental and analytical studies on shear behaviors of FRP-concrete composite sections
AU - Zou, Xingxing
AU - Feng, Peng
AU - Bao, Yi
AU - Wang, Jingquan
AU - Xin, Haohui
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/7/15
Y1 - 2020/7/15
N2 - The design of FRP profile-concrete composite sections, including beams and decks, is usually governed by the shear strength of the FRP profiles. However, analytical methods that can precisely predict the shear capacity of the composite sections have not been well developed, because there is lack of knowledge of the FRP-concrete composite action and distribution of shear stress along the FRP. This paper investigates the shear behaviors of FRP-concrete composite sections and develops formulae to predict the shear capacity of the composite sections. First, flexural tests of three FRP-concrete composite beams were conducted to investigate the shear failure mode and interface behaviors. All the beams failed in FRP shear fracture along horizontal direction. Then, push-out tests were used to determine the slip property for the FRP-concrete interface which reveals that FRP stay-in-place form and steel bolts can ensure full and partial composite action, respectively. Based on the experimental study, closed-form equations to compute the maximum shear stress are derived and validated against experimental data in this paper and literature. Finally, simple yet reliable equations of shear capacity are derived and recommended for engineers to design the FRP-concrete composite sections.
AB - The design of FRP profile-concrete composite sections, including beams and decks, is usually governed by the shear strength of the FRP profiles. However, analytical methods that can precisely predict the shear capacity of the composite sections have not been well developed, because there is lack of knowledge of the FRP-concrete composite action and distribution of shear stress along the FRP. This paper investigates the shear behaviors of FRP-concrete composite sections and develops formulae to predict the shear capacity of the composite sections. First, flexural tests of three FRP-concrete composite beams were conducted to investigate the shear failure mode and interface behaviors. All the beams failed in FRP shear fracture along horizontal direction. Then, push-out tests were used to determine the slip property for the FRP-concrete interface which reveals that FRP stay-in-place form and steel bolts can ensure full and partial composite action, respectively. Based on the experimental study, closed-form equations to compute the maximum shear stress are derived and validated against experimental data in this paper and literature. Finally, simple yet reliable equations of shear capacity are derived and recommended for engineers to design the FRP-concrete composite sections.
KW - Composite action
KW - FRP-concrete composite sections
KW - Shear capacity
KW - Shear connection
KW - Slip effect
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U2 - 10.1016/j.engstruct.2020.110649
DO - 10.1016/j.engstruct.2020.110649
M3 - Article
AN - SCOPUS:85084293155
SN - 0141-0296
VL - 215
JO - Engineering Structures
JF - Engineering Structures
M1 - 110649
ER -