Title:
Glass Fiber-Reinforced Polymer Bars under Sustained Load and Alkaline Conditions
Author(s):
Callum Harper and Shamim A. Sheikh
Publication:
Structural Journal
Volume:
121
Issue:
4
Appears on pages(s):
3-18
Keywords:
alkalinity; creep-rupture; durability; elevated temperature; glass fiber-reinforced polymer (GFRP) bars; stress limits; sustainability; sustained load
DOI:
10.14359/51740708
Date:
7/1/2024
Abstract:
This paper presents the results of creep rupture tests conducted ontwo different sizes of glass fiber-reinforced polymer (GFRP) bars from two different manufacturers under high alkaline conditions at room temperature (approximately 23 and 60°C [73.4 and 140°F]).Regular tensile tests were also conducted on the bars at the two temperatures to provide insight into the effects of high temperatureon their long-term performance. The results show that the larger bar performed slightly better at room temperature but significantly better at the elevated temperature. The larger-sized bars also lost less tensile strength at the elevated temperature. It was observed that temperature had a greater effect on the long-term performance of GFRP bars than alkalinity. The current design code limits on the allowable stresses were evaluated against the test results and found to be overly conservative.