Experimental Investigation of HFRP Composite Beams

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Title: Experimental Investigation of HFRP Composite Beams

Author(s): Hiroshi Mutsuyoshi, Nguyen Duc Hai, Kensuke Shiroki, Thiru Aravinthan, and Allan Manalo

Publication: Special Publication

Volume: 275

Issue:

Appears on pages(s): 1-26

Keywords: Composite beam, hybrid fiber reinforced polymer, normal strength concrete, ultra-high performance fiber-reinforced concrete, flexural stiffness

Date: 3/1/2011

Abstract:
This paper presents the development of composite beams using hybrid CFRP/GFRP (HFRP) I-beam and Normal Strength Concrete (NSC) slab and precast Ultra-High Performance fiber reinforced Concrete (UHPFRC) slab. UHPFRC has high strength and high ductility allowing for a reduction in the cross-sectional area and self weight of the beam. A number of full-scale flexural beam tests were conducted using different dimensions of slab and with/without epoxy bonding between the slab and HFRP I-beam. The test results suggested that the flexural stiffness of composite beams with bolted and bonded shear connection is higher than that with bolted-only shear connection. Delamination failure was not observed in the compressive flange of the HFRP I-beam and the high tensile strength of CFRP in the bottom flange was effectively utilized with the addition of the UHPFRC slab on the top flange.