Test Research on Mechanical Property of GFRP Bolt under Freeze-Thaw Cycle Conditions

Abstract:

In this paper, GFRP bolts in diameter of 25mm are tested through freeze-thaw cycle by 50, 100 and 150 times to study their change law of appearance, weight, strength and elastic modulus. As reflected from the test results, after the freeze-thaw cycle, the appearance and weight of GFRP bolts are basically not changed. As the freeze-thaw cycle increases from 50 times to 100 times, the strength of bolts decreases gradually. After 50, 100 and 150 times of freeze-thaw cycle, the ultimate tensile strength of bolt decreases by 2.82%, 4.35% and 8.84%, respectively. During the process that the times of freeze-thaw cycle increase from 50 to 100, the elastic modulus of GFRP bolts grows gradually. After 50, 100 and 150 times of freeze-thaw cycle, the elastic modulus increases by 1.42%, 2.68% and 3.92%, respectively. The freeze-thaw cycle leads to embrittlement of GFRP materials and weakness of ductility, while not obviously.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 689-694
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.689
• Online since: December 2012
• Authors: Xie Xing Tang, Xiao Yong Luo, Qi Sun, Ya Chuan Kuang
• Keywords: Anchoring, Durability, Freeze-Thaw Cycle, Glass Fiber Reinforced Polymer (GFRP)

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