Paper Title:
Propagation Behavior of Interfacial Fatigue Cracks in RC Beams Strengthened with Pre-Stressed FRP
  Abstract

Debonding failure mode usually occurs in the concrete structure flexural strengthened with fiber reinforced polymer (FRP) under cyclic loading. This paper presents an experimental investigation into the fatigue behavior of the FRP-concrete interface of reinforced concrete (RC) beams strengthened with prestressed FRP. 8 small-scale beams were tested under three-point bending cyclic loading. The propagation behavior of the fatigue interface cracks is addressed, and curves showing the growth law of interface cracks are presented. Results from these tests show that the propagation process of interface cracks had three stages, including rapid, stable and unstable growth. The stable propagation phase experienced the most part of the whole test, and the failure mode of all failed beams was debonding following the fatigue fracture of the tensile steel bars. In addition, the influence of FRP prestressing level on the fatigue lives of strengthened beams is discussed, and an empirical formula is developed to predict the fatigue lives of such members. The results show that the fatigue life increases with the prestressed level of FRP. This study provides an insight on the potential long-term performance of FRP-strengthened beams submitted to fatigue loading conditions.

  Info
Periodical
Key Engineering Materials (Volumes 462-463)
Edited by
Ahmad Kamal Ariffin, Shahrum Abdullah, Aidy Ali, Andanastuti Muchtar, Mariyam Jameelah Ghazali and Zainuddin Sajuri
Pages
177-182
DOI
10.4028/www.scientific.net/KEM.462-463.177
Citation
J. H. Xie, P. Y. Huang, F. Liu, Y. C. Guo, "Propagation Behavior of Interfacial Fatigue Cracks in RC Beams Strengthened with Pre-Stressed FRP", Key Engineering Materials, Vols. 462-463, pp. 177-182, 2011
Online since
January 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shi Lang Xu, Nan Wang
Abstract:For studying the effectiveness of externally pouring Ultra High Toughness Cementitious Composites (UHTCC) in improving the flexural behaviors...
6
Authors: Jiang Feng Dong, Qing Yuan Wang, Yan Mei Zhu
Abstract:This paper presents the results of an experimental research work designed to study the flexural strengthening capacity and the modes of...
842
Authors: Yu Deng, Jiong Feng Liang
Abstract:Concrete beams reinforced with fiber reinforced polymer(FRP)bars exhibit large deflections and crack widths as compared to concrete beams...
2182
Authors: Dan Ying Gao, Ming Zhang
Chapter 1: Advanced and Sustainable Materials
Abstract:Based on the fatigue test, 8 steel fiber reinforced high-strength concrete beams are studied, the influencing factors of crack width are...
190