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Internal and External FRP Reinforcement of Civil Engineering Structures

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: closed (20 July 2023) | Viewed by 2256

Special Issue Editors


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Guest Editor
MAST-SMC, University Gustave Eiffel, Route de Bouaye, 44341 Bouguenais, France
Interests: external and internal FRP reinforcement of civil engineering structures; use of structural adhesive bonding; steel structures assembly (welding, riveting, bolting); non destructive control and monitoring

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Guest Editor
Lab Navier, Univ. Gustave Eiffel, Ecole Nationale des Ponts et Chaussées (ENPC), Centre National de la Recherche Scientifique (CNRS), F-77447 Marne la Vallée, France
Interests: durability of FRP composites and bonded assemblies used in construction; bio-based composites; nanoparticle-reinforced polymers and adhesives; quantitative and non-destructive inspection methods applied to bonded joints; SHM of concrete structures with fiber-optic sensors
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Guest Editor
Matériaux et Structures (MAST) Department, Univ. Gustave Eiffel, 14-20 Boulevard Newton, CEDEX 2, F-77447 Marne la Vallée, France
Interests: externally bonded Fiber‐Reinforced Polymer (FRP) for the repair; strengthening, and retrofitting of existing reinforced concrete (RC) structures; FRP rebars for the strengthening of RC structures; optical fiber sensors for the SHM of RC structures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Civil engineering structures will be facing huge challenges in the coming decades due to fast-changing constraints and environmental loads. In this context, it is necessary to improve the resilience of these infrastructures against extreme climatic events, to foster construction methods that allow more efficient use of raw materials and limit natural resource depletion, and to promote constructive solutions ensuring both low-maintenance costs and extended lifespan.

Since the late 1980ies, Fiber-Reinforced Polymer (FRP) composites have gained growing interest in the field of civil engineering, either for the strengthening/rehabilitation of existing civil structures using externally bonded FRP sheets or plates (also referred to as EB-FRP method), or for the internal reinforcement of new concrete structures with FRP bars. The outstanding mechanical properties, corrosion resistance and light weight of these FRP materials are major assets that can contribute to addressing the future challenges of civil infrastructures.

This Special Issue (SI) aims at gathering some of the latest developments regarding the use of FRP in civil engineering applications and includes research studies conducted both at the material and structural scales.

The main topics covered by the SI are the following ones, but this list is not exhaustive:

  • Development of new FRP materials, systems and strengthening techniques,
  • Experimental and/or theoretical assessment of FRP-based techniques,
  • Durability appraisal and long-term performance of FRP-based techniques (effects of environmental and mechanical factors, coupled effects),
  • Non-destructive testing methods, monitoring and diagnosis of FRP elements and related adhesively bonded joints,
  • Update of design codes, guidelines and standards (EB-FRP technique, and FRP reinforced concrete structures),
  • Life Cycle Assessment (LCA) and Life Cycle Cost (LCC) of FRP solutions,
  • Field case studies,
  • Review papers.

Contributions on any other relevant topics related to FRPs in civil engineering are also welcome in this SI.

Dr. Sylvain Chataigner
Dr. Karim Benzarti
Dr. Marc Quiertant
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fiber-reinforced polymer (FRP) composites
  • external strengthening
  • rehabilitation
  • retrofitting
  • FRP reinforcing bars
  • internal reinforcement
  • concrete/FRP bond
  • durability issues
  • lifetime extension

Published Papers (2 papers)

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Research

20 pages, 20094 KiB  
Article
Verification of Composite Beam Theory with Finite Element Model for Pretensioned Concrete Members with Prestressing FRP Tendons
by Xin Sha and James S. Davidson
Materials 2023, 16(19), 6376; https://doi.org/10.3390/ma16196376 - 24 Sep 2023
Cited by 1 | Viewed by 705
Abstract
Composite beam theory was previously developed to establish an analytical solution for determining the transfer length of prestressed fiber-reinforced polymers (FRP) tendons in pretensioned concrete members. In the present study, a novel finite element (FE) modeling approach is proposed to provide further verification [...] Read more.
Composite beam theory was previously developed to establish an analytical solution for determining the transfer length of prestressed fiber-reinforced polymers (FRP) tendons in pretensioned concrete members. In the present study, a novel finite element (FE) modeling approach is proposed to provide further verification of the developed analytical method. The present FE model takes into account the friction coefficients obtained from pull-out tests on the FRP tendons and prestressed concrete members. Convergence analysis of two numerical simulations with different mesh densities is carried out as well. The results demonstrated that the transfer length predicted by the fine FE model with a friction coefficient of α = 0.3 for high pretension is in good agreement with the measured values and the analytical solutions. The consistency between the analytical solution and FE simulation not only further proves the reliability of composite beam theory but also demonstrates the importance of the bond–slip relationship in predicting the transfer length of pretensioned concrete members prestressed with FRP tendons. Full article
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15 pages, 1518 KiB  
Article
Numerical Modelling of the Nonlinear Shear Creep Behavior of FRP-Concrete Bonded Joints
by François Soleilhet, Marc Quiertant and Karim Benzarti
Materials 2023, 16(2), 801; https://doi.org/10.3390/ma16020801 - 13 Jan 2023
Cited by 2 | Viewed by 1147
Abstract
This paper presents a numerical investigation of the shear creep behavior of the adhesive joint in concrete structures strengthened by externally bonded fibre-reinforced polymers (FRP) composites. Based on experimental data collected in a previous study, creep constitutive equations were developed for the adhesive [...] Read more.
This paper presents a numerical investigation of the shear creep behavior of the adhesive joint in concrete structures strengthened by externally bonded fibre-reinforced polymers (FRP) composites. Based on experimental data collected in a previous study, creep constitutive equations were developed for the adhesive layer and implemented into a finite element code. The proposed model extends the classical one-dimensional formulation of Burgers creep model to a fully 3D model and introduces the nonlinearity of the model parameters. This numerical approach was first used to simulate the nonlinear creep behavior of bulk epoxy samples; it was then extended to predict the nonlinear creep response of the FRP-concrete interface in double lap shear specimens. Globally, a fair agreement was obtained between numerical results and experimental evidences. As a main result, it was found that creep induces a redistribution of the interfacial shear stress along the FRP-concrete lap joint, leading both to a stress relaxation near the loaded end of the adhesive joint and to an increase in the effective transfer length. Full article
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