Fatigue equation of structural materials and members under hot-wet environment and cyclic bending loads

Issue title: Special Issue: Memorial Issue in the Honor of Prof. Takeo Yokobori

Guest editors: Alberto Carpinteri, Yu Shouwen and Teruo Kishi

Article type: Research Article

Authors: Chen, Zhanbiao^a | Huang, Peiyan^{a; b;} | Guo, Xinyan^a | Zheng, Xiaohong^a | Yang, Yi^a

Affiliations: [a] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China | [b] State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China

Correspondence: [*] E-mail: [email protected]

Abstract: The main structural members of bridges are served under vehicle loads and environment coupling action. Therefore, there is a need for an effective method which can be used to analysis fatigue behavior of bridge structural materials and members under coupling action of hot-wet environment and cyclic loads. In this paper, a hot-wet environment fatigue equation was proposed for describing the fatigue behavior of steel fiber polymer structural concrete (SFPSC) and reinforced concrete (RC) beams strengthened with carbon fiber reinforced polymer (CFRP), and the fatigue experiments under the coupling and uncoupling action of different hot-wet conditions and cyclic bending loads were carried out. The research results showed that the proposed hot-wet environmental fatigue equation was effective and feasible for predicting the fatigue lives and the fatigue limits of the structural material and members of the bridges.

Keywords: Fatigue equation, hot-wet environment, steel fiber polymer structural concrete (SFPSC), carbon fiber reinforced polymer (CFRP), fatigue life

DOI: 10.3233/SFC-190241

Journal: Strength, Fracture and Complexity, vol. 12, no. 2-4, pp. 119-125, 2020