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Proceedings Paper

An improved method for testing tension properties of fiber-reinforced polymer rebar
Author(s): Guoqing Yuan; Jian Ma; Guohua Dong
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Paper Abstract

We have conducted a series of tests to measure tensile strength and modulus of elasticity of fiber reinforced polymer (FRP) rebar. In these tests, the ends of each rebar specimen were embedded in steel tube filled with expansive cement, and the rebar was loaded by gripping the tubes with the conventional fixture during the tensile tests. However, most of specimens were failed at the ends where the section changed abruptly. Numerical simulations of the stress field at bar ends in such tests by ANSYS revealed that such unexpected failure modes were caused by the test setup. The changing abruptly of the section induced stress concentration. So the test results would be regarded as invalid. An improved testing method is developed in this paper to avoid this issue. A transition part was added between the free segment of the rebar and the tube, which could eliminate the stress concentration effectively and thus yield more accurate values for the properties of FRP rebar. The validity of the proposed method was demonstrated by both experimental tests and numerical analysis.

Paper Details

Date Published: 14 April 2010
PDF: 9 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752261 (14 April 2010); doi: 10.1117/12.848192
Show Author Affiliations
Guoqing Yuan, Tongji Univ. (China)
Jian Ma, Tongji Univ. (China)
Guohua Dong, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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