ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 21 December 2005
Page Count: 9

Direct Shear Behavior of Carbon Fiber-Reinforced Polymer Laminates and Concrete

Hsu, CTT
Professor and Director of structures Laboratory, New Jersey Institute of Technology, Newark, N.J.

Punurai, W
Lecturer, Mahidol University, Nakompatom,

Jia, Y
New Jersey Institute of Technology, Newark, N.J.

Bian, H
New Jersey Institute of Technology, Newark, N.J.

(Received 16 July 2004; accepted 23 August 2005)

Abstract

This paper explores the direct shear behavior between carbon fiber-reinforced polymer (CFRP) laminates and concrete. To study the push-off strength and slip relationship of externally bonded strengthening system, a new test setup is proposed herein. In this research, a total of 27 specimens are tested. The test variables include the maximum compressive strength of concrete, from 4000 to 12000 psi. With this test setup, it has been found to be able to investigate the direct shear condition between the CFRP laminates and concrete. Based on the present test results, empirical formulas to account for the push-off strength and slip relationship of various concrete compressive strengths are developed. This relationship enables further understanding of the transfer mechanism between the CFRP laminates and concrete. Also, the effect of salt water on the ultimate direct shear strength of the CFRP strengthening system is discussed.

Keywords:
direct shear, push-off strength, slip, CFRP laminates, concrete, salt water, tests

Paper ID: JTE12694
DOI: 10.1520/JTE12694
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