Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates-Reference-Cited by-同舟云学术

Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates

Published:2024-02-04 Issue:2 Volume:14 Page:430
ISSN:2075-5309
Container-title:Buildings
language:en
Short-container-title:Buildings

Author:

Min Xinzhe¹,Yang Dong²,Song Shoutan³,Li Xing⁴

Affiliation:

1. School of Civil Engineering and Architecture, Nanjing Institute of Technology, Nanjing 211167, China

2. School of Architectural Engineering, Jinling Institute of Technology, Nanjing 211169, China

3. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, National Engineering Research Center for Prestressing Technology, School of Civil Engineering, Southeast University, Nanjing 211189, China

4. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

Abstract

Externally-bonded FRP laminate is widely used in structural strengthening due to the many advantages of FRP materials. Further enhancement of the strengthening effect can be achieved by inducing prestress into the FRP laminate. However, FRP debonding is still a main issue of this strengthening method, especially the Intermediate Crack-induced debonding (IC debonding). To better understand the impact of FRP debonding on the strengthening effect, a series of parameter analyses were conducted in this study based on the fatigue life prediction model proposed by the authors. The proposed model involves the fatigue damage accumulation of components of the beam, the mutual interaction between each component, and the impact of FRP fatigue debonding. As a result, a stress threshold for preventing FRP fatigue debonding in strengthening the concrete beam was proposed, which aimed to avoid safety hazards caused by IC debonding in practical engineering.

Funder

Natural Science Foundation of Jiangsu Province of China

Scientific Research Foundation of Nanjing Institute of Technology

Natural Science Foundation of the Jiangsu Higher Education Institutions of China

Publisher

MDPI AG

Link

https://www.mdpi.com/2075-5309/14/2/430/pdf

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