Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical Study

Research output: Contribution to journalArticle

5 Citations (Scopus)
79 Downloads (Pure)

Abstract

This study investigates the evolution of intrinsic interfacial de-bonding of Roller Compacted Steel Fibre Reinforced Polymer Modified Concrete (RC-SFR-PMC) bonded on substrate Ordinary Portland Cement Concrete (OPCC), using both experimental and numerical techniques. The relative effects of evolving material inhomogeneity and composite dimensional stability during curing was studied as a function of overlay structural scale, using a 2D plane strain Interface Cohesive Zone Model (ICZM). The effects of creep coefficient on interface restraint capacity and ensuing cohesive zone length were clearly evaluated. The results showed that the applied curvature due to the measured shrinkage strain was inadequate to cause critical de-bonding. In the FEA results, while the rate of interface energy release generally varies as a function of the bi-material relative stiffness and overlay structural scale, it is also evident that the two variables lose effects as the overlay structural scale approaches 0.50. The overall indicative trend shows that the rate of energy release in compliant overlay when relative stiffness( α<0) is higher than when α>0. Therefore, a more compliant overlay typically exhibits less relative restraint to bending induced de-bonding.
Original languageEnglish
Pages (from-to)155-174
Number of pages20
JournalEngineering Solid Mechanics
Volume6
Issue number2
Early online date15 Jan 2018
DOIs
Publication statusPublished - 2018

Fingerprint

Concretes
Stiffness
Portland cement
Interfaces (computer)
Curing
Polymers
Creep
Finite element method
Fibers

Bibliographical note

CC BY

Keywords

  • Intrinsic
  • De-bonding
  • Composite
  • Overlay
  • FEA
  • Restraint

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

@article{e823197b23344224af77ed72618abf23,
title = "Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical Study",
abstract = "This study investigates the evolution of intrinsic interfacial de-bonding of Roller Compacted Steel Fibre Reinforced Polymer Modified Concrete (RC-SFR-PMC) bonded on substrate Ordinary Portland Cement Concrete (OPCC), using both experimental and numerical techniques. The relative effects of evolving material inhomogeneity and composite dimensional stability during curing was studied as a function of overlay structural scale, using a 2D plane strain Interface Cohesive Zone Model (ICZM). The effects of creep coefficient on interface restraint capacity and ensuing cohesive zone length were clearly evaluated. The results showed that the applied curvature due to the measured shrinkage strain was inadequate to cause critical de-bonding. In the FEA results, while the rate of interface energy release generally varies as a function of the bi-material relative stiffness and overlay structural scale, it is also evident that the two variables lose effects as the overlay structural scale approaches 0.50. The overall indicative trend shows that the rate of energy release in compliant overlay when relative stiffness( α<0) is higher than when α>0. Therefore, a more compliant overlay typically exhibits less relative restraint to bending induced de-bonding.",
keywords = "Intrinsic, De-bonding, Composite, Overlay, FEA, Restraint",
author = "Adegoke Olubanwo and John Karadelis and Messaoud Saidani and Morteza Khorami and Samuel Abbey",
note = "CC BY",
year = "2018",
doi = "10.5267/j.esm.2018.1.003",
language = "English",
volume = "6",
pages = "155--174",
journal = "Engineering Solid Mechanics",
issn = "2291-8744",
publisher = "Growing Science",
number = "2",

}

TY - JOUR

T1 - Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical Study

AU - Olubanwo, Adegoke

AU - Karadelis, John

AU - Saidani, Messaoud

AU - Khorami, Morteza

AU - Abbey, Samuel

N1 - CC BY

PY - 2018

Y1 - 2018

N2 - This study investigates the evolution of intrinsic interfacial de-bonding of Roller Compacted Steel Fibre Reinforced Polymer Modified Concrete (RC-SFR-PMC) bonded on substrate Ordinary Portland Cement Concrete (OPCC), using both experimental and numerical techniques. The relative effects of evolving material inhomogeneity and composite dimensional stability during curing was studied as a function of overlay structural scale, using a 2D plane strain Interface Cohesive Zone Model (ICZM). The effects of creep coefficient on interface restraint capacity and ensuing cohesive zone length were clearly evaluated. The results showed that the applied curvature due to the measured shrinkage strain was inadequate to cause critical de-bonding. In the FEA results, while the rate of interface energy release generally varies as a function of the bi-material relative stiffness and overlay structural scale, it is also evident that the two variables lose effects as the overlay structural scale approaches 0.50. The overall indicative trend shows that the rate of energy release in compliant overlay when relative stiffness( α<0) is higher than when α>0. Therefore, a more compliant overlay typically exhibits less relative restraint to bending induced de-bonding.

AB - This study investigates the evolution of intrinsic interfacial de-bonding of Roller Compacted Steel Fibre Reinforced Polymer Modified Concrete (RC-SFR-PMC) bonded on substrate Ordinary Portland Cement Concrete (OPCC), using both experimental and numerical techniques. The relative effects of evolving material inhomogeneity and composite dimensional stability during curing was studied as a function of overlay structural scale, using a 2D plane strain Interface Cohesive Zone Model (ICZM). The effects of creep coefficient on interface restraint capacity and ensuing cohesive zone length were clearly evaluated. The results showed that the applied curvature due to the measured shrinkage strain was inadequate to cause critical de-bonding. In the FEA results, while the rate of interface energy release generally varies as a function of the bi-material relative stiffness and overlay structural scale, it is also evident that the two variables lose effects as the overlay structural scale approaches 0.50. The overall indicative trend shows that the rate of energy release in compliant overlay when relative stiffness( α<0) is higher than when α>0. Therefore, a more compliant overlay typically exhibits less relative restraint to bending induced de-bonding.

KW - Intrinsic

KW - De-bonding

KW - Composite

KW - Overlay

KW - FEA

KW - Restraint

UR - http://www.growingscience.com/esm/online/esm_2018_3.pdf

U2 - 10.5267/j.esm.2018.1.003

DO - 10.5267/j.esm.2018.1.003

M3 - Article

VL - 6

SP - 155

EP - 174

JO - Engineering Solid Mechanics

JF - Engineering Solid Mechanics

SN - 2291-8744

IS - 2

ER -