A discrete spectral model for intermediate crack debonding in FRP-strengthened RC beams

Sun, Rui and Sevillano Bravo, Enrique and Perera Velamazán, Ricardo (2015). A discrete spectral model for intermediate crack debonding in FRP-strengthened RC beams. "Composites Part B: Engineering", v. 69 ; pp. 562-575. ISSN 1359-8368. https://doi.org/10.1016/j.compositesb.2014.10.017.

Description

Title: A discrete spectral model for intermediate crack debonding in FRP-strengthened RC beams
Author/s:
  • Sun, Rui
  • Sevillano Bravo, Enrique
  • Perera Velamazán, Ricardo
Item Type: Article
Título de Revista/Publicación: Composites Part B: Engineering
Date: March 2015
ISSN: 1359-8368
Volume: 69
Subjects:
Freetext Keywords: Polymer matrix composites; Debonding; Computational modelling
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Mecánica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

One of the common failure modes of reinforced concrete (RC) beams strengthened in flexure with a bonded fibre-reinforced polymer (FRP) is intermediate crack (IC) debonding, which is originated at a critical section in the vicinity of flexural cracks and propagates to a plate end. Despite considerable research over the last years, few reliable and simplified IC debonding strength models have been developed. This paper firstly presents a one-dimensional model based on the discrete crack approach for concrete and the spectral element method for the numerical simulation of the IC debonding process. The progressive formation of flexural cracks and subsequent concrete-FRP interfacial debonding is formulated by the introduction of a new element able to represent both phenomena simultaneously without perturbing the numerical procedure. Furthermore, with the proposed model, high frequency dynamic response for these kinds of structures can also be obtained in a very simple and non-expensive way, which makes this procedure very useful as a tool for diagnoses and detection of debonding in its initial stage by monitoring the change in local dynamic characteristics.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainBIA2010-20234-C03-01UnspecifiedUniversidad Politécnica de MadridEstructuras inteligentes de hormigon reforzadas con FRP

More information

Item ID: 35881
DC Identifier: http://oa.upm.es/35881/
OAI Identifier: oai:oa.upm.es:35881
DOI: 10.1016/j.compositesb.2014.10.017
Official URL: http://www.sciencedirect.com/science/article/pii/S1359836814004612
Deposited by: Memoria Investigacion
Deposited on: 04 Apr 2016 08:38
Last Modified: 04 Apr 2016 08:55
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