Intermediate crack-induced debonding in RC beams externally strengthened with prestressed FRP laminates-Reference-Cited by-同舟云学术

Intermediate crack-induced debonding in RC beams externally strengthened with prestressed FRP laminates

Published:2013-06-20 Issue:23 Volume:32 Page:1842-1857
ISSN:0731-6844
Container-title:Journal of Reinforced Plastics and Composites
language:en
Short-container-title:Journal of Reinforced Plastics and Composites

Author:

Wang Wen-Wei¹,Dai Jian-Guo²,Harries Kent A³

Affiliation:

1. Department of Bridge Engineering, Southeast University, Nanjing, China

2. Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong

3. Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, USA

Abstract

Intermediate crack-induced debonding is often a dominant failure mode in fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams in flexure. It has been extensively studied for RC beams externally strengthened with unstressed FRP laminates. However, very little work has been done on FRP debonding for RC beams strengthened with prestressed FRP. This article presents a sectional analysis model for predicting the flexural capacity of RC beams strengthened with prestressed FRP laminates with due consideration of different failure modes. The focus is placed on the effective strain in the prestressed FRP at the ultimate states of intermediate crack-induced debonding or rupture of debonded FRP. Through back-calculation analysis of 51 RC beams strengthened with post-tensioned FRP laminates, a model for predicting the effective strain of prestressed FRP for ultimate strength prediction based upon sectional analyses was developed and validated through comparisons with test results.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

Link

http://journals.sagepub.com/doi/pdf/10.1177/0731684413492574

Reference27 articles.

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