Fatigue crack behavior of RC beams strengthened with CFL under cylic bending loads

Xiaohong Zheng; Peiyan Huang; Xinyan Guo

doi:10.1117/12.839065

24 August 2009 Fatigue crack behavior of RC beams strengthened with CFL under cylic bending loads

Xiaohong Zheng, Peiyan Huang, Xinyan Guo

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73751L (2009) https://doi.org/10.1117/12.839065
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

A mechanical model of cracked reinforced concrete (RC) beams strengthened with carbon fiber laminate (CFL) is proposed to establish the theoretical relationship among the crack height (a), the number of fatigue loading cycles (n), and the fatigue life (N), and the main crack growth behavior is discussed. Moreover, some fatigue tests of the RC beams strengthened with CFL were carried out on material testing system (MTS) to investigate the crack growth rate (da/dn). The analysis results show that the crack growth behavior of RC beams strengthened with CFL may be divided into three stages: 1) initiation and rapid growth, 2) steady growth and arrest, 3) unstable growth. At the stage of crack steady growth and arrest, the relationship among, da/dn, n, and N could be expressed as: da/dn=C/(nlnN), where the constant coefficient, C, is determined from the fatigue tests.

Citation Download Citation

Xiaohong Zheng, Peiyan Huang, and Xinyan Guo "Fatigue crack behavior of RC beams strengthened with CFL under cylic bending loads", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73751L (24 August 2009); https://doi.org/10.1117/12.839065

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