Bond between Glass Fiber Reinforced Plastic Reinforcing Bars and Concrete—Experimental Analysis

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Title: Bond between Glass Fiber Reinforced Plastic Reinforcing Bars and Concrete—Experimental Analysis

Author(s): E. Cosenza, G. Manfredi, M. Pecce, and R. Realfonzo

Publication: Special Publication

Volume: 188

Issue:

Appears on pages(s): 347-358

Keywords: bond tests; embedment length; slips; stresses; tensile strength

Date: 8/1/1999

Abstract:
In this paper results of an experimental investigation on bond between a glass fiber reinforced plastic (GFRP) rebar and concrete are presented and discussed. Rebars used in tests are the FRP C-BarTM produced by Marshall Industries Composites, Inc. Bond tests were carried out by using a test machine obtained from a modification of the standard scheme of the beam-test and were conducted on prismatic concrete specimens within which a #4 Grade B E-Glass C-Bar was embedded: the embedment length was ranging from 5 to 30 times the bar diameter, thus obtaining different test arrangements. Bond-slip relationships were obtained and bond mechanisms discussed. Furthermore, values of elastic modulus and tensile strength of rebar were evaluated. Finally, a bond-slip constitutive law obtained by means of a system identification procedure is presented. Numerical simulations of bond tests have been performed by using such bond-slip relationship and the obtained bond-slip curves have been compared with the experimental ones.