Next Article in Journal
Concrete Properties Comparison When Substituting a 25% Cement with Slag from Different Provenances
Previous Article in Journal
An Investigation of the Wear on Silicon Surface at High Humidity
Open AccessArticle

Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure

by Guanghui Li 1, Jun Zhao 2,* and Zike Wang 2
1
School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
2
School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 1028; https://doi.org/10.3390/ma11061028
Received: 15 May 2018 / Revised: 6 June 2018 / Accepted: 14 June 2018 / Published: 16 June 2018
Fiber-reinforced polymer (FRP) bars have been widely applied in civil engineering. This paper presents the results of an experimental study to investigate the tensile fatigue mechanical properties of glass fiber-reinforced polymer (GFRP) bars after elevated temperatures exposure. For this purpose, a total of 105 GFRP bars were conducted for testing. The specimens were exposed to heating regimes of 100, 150, 200, 250, 300 and 350 °C for a period of 0, 1 or 2 h. The GFRP bars were tested with different times of cyclic load after elevated temperatures exposure. The results show that the tensile strength and elastic modulus of GFRP bars decrease with the increase of elevated temperature and holding time, and the tensile strength of GFRP bars decreases obviously by 19.5% when the temperature reaches 250 °C. Within the test temperature range, the tensile strength of GFRP bars decreases at most by 28.0%. The cyclic load accelerates the degradation of GFRP bars after elevated temperature exposure. The coupling of elevated temperature and holding time enhance the degradation effect of cyclic load on GFRP bars. The tensile strength of GFRP bars after elevated temperatures exposure at 350 °C under cyclic load is reduced by 50.5% compared with that at room temperature and by 36.3% compared with that after exposing at 350 °C without cyclic load. In addition, the elastic modulus of GFRP bars after elevated temperatures exposure at 350 °C under cyclic load is reduced by 17.6% compared with that at room temperature and by 6.0% compared with that after exposing at 350 °C without cyclic load. View Full-Text
Keywords: glass fiber-reinforced polymer (GFRP) bars; elevated temperature; cyclic load; tensile strength; elastic modulus; fatigue behavior glass fiber-reinforced polymer (GFRP) bars; elevated temperature; cyclic load; tensile strength; elastic modulus; fatigue behavior
Show Figures

Figure 1

MDPI and ACS Style

Li, G.; Zhao, J.; Wang, Z. Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure. Materials 2018, 11, 1028.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop