TY - JOUR
T1 - Hybrid shear strengthening system for reinforced concrete beams
T2 - An experimental study
AU - Ebead, Usama
AU - Saeed, Huda
N1 - Funding Information:
The authors would like to express his sincere appreciation to the Research Affairs at the United Arab Emirates University for the financial support of this project under fund Grant #1543-07-01-10. The author would also like to acknowledge help of the staff in the Structures lab in the UAEU in particular Mr. Tarek Salah and Mr. Faisal Abdelwahab.
PY - 2013/4
Y1 - 2013/4
N2 - This research mainly investigates the efficacy of the mechanically fastened fiber reinforced polymer (MF-FRP) and the hybrid externally bonded/mechanically fastened FRP (EB/MF-FRP) strengthening systems for beam shear strengthening as compared to the well-established EB-FRP counterpart. The results of twenty-one (21) beam specimens categorized into four types, namely, reference specimens, EB-FRP, MF-FRP-FRP and hybrid EB/MF-FRP strengthened specimens are reported. The work presented is part of a research campaign on the use of the newly developed MF-FRP and EB/MF-FRP strengthening systems. A comprehensive study is presented on the effect of using the MF-FRP and the hybrid EB/MF FRP strengthening systems on the modes of failure of the strengthened beams. Utilizing the MF- and hybrid EB/MF-FRP strengthening systems aims mainly to avoid the debonding type of failure that is often experienced when using externally side bonded FRP strips. The effect of the interaction between the external strengthening strips and the internal transverse steel reinforcement on the shear capacity of the beams is qualitatively assessed for the EB-, MF-, and hybrid EB/MF-FRP strengthening systems. This has been achieved by testing specimens with and without transverse steel reinforcement within the critical shear span. Moreover, different parameters have been assessed through utilizing wide versus narrow and vertical versus inclined FRP strips in addition to utilizing two different patterns of fasteners for the MF- and the hybrid EB/MF-FRP strengthening systems.
AB - This research mainly investigates the efficacy of the mechanically fastened fiber reinforced polymer (MF-FRP) and the hybrid externally bonded/mechanically fastened FRP (EB/MF-FRP) strengthening systems for beam shear strengthening as compared to the well-established EB-FRP counterpart. The results of twenty-one (21) beam specimens categorized into four types, namely, reference specimens, EB-FRP, MF-FRP-FRP and hybrid EB/MF-FRP strengthened specimens are reported. The work presented is part of a research campaign on the use of the newly developed MF-FRP and EB/MF-FRP strengthening systems. A comprehensive study is presented on the effect of using the MF-FRP and the hybrid EB/MF FRP strengthening systems on the modes of failure of the strengthened beams. Utilizing the MF- and hybrid EB/MF-FRP strengthening systems aims mainly to avoid the debonding type of failure that is often experienced when using externally side bonded FRP strips. The effect of the interaction between the external strengthening strips and the internal transverse steel reinforcement on the shear capacity of the beams is qualitatively assessed for the EB-, MF-, and hybrid EB/MF-FRP strengthening systems. This has been achieved by testing specimens with and without transverse steel reinforcement within the critical shear span. Moreover, different parameters have been assessed through utilizing wide versus narrow and vertical versus inclined FRP strips in addition to utilizing two different patterns of fasteners for the MF- and the hybrid EB/MF-FRP strengthening systems.
KW - Externally bonded FRP
KW - Fasteners
KW - Hybrid
KW - Mechanically fastened FRP
KW - Reinforced concrete beams
KW - Shear strengthening
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U2 - 10.1016/j.engstruct.2012.11.039
DO - 10.1016/j.engstruct.2012.11.039
M3 - Article
AN - SCOPUS:84871785641
SN - 0141-0296
VL - 49
SP - 421
EP - 433
JO - Engineering Structures
JF - Engineering Structures
ER -