Special Issue "FRP Composites in Structural Concrete"

A special issue of Journal of Composites Science (ISSN 2504-477X).

Deadline for manuscript submissions: 31 December 2019.

Special Issue Editors

Prof. Dr. Carlos Chastre
E-Mail Website
Guest Editor
Department of Civil Engineering, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa. Campus de Caparica, 2829-516 Caparica, Portugal
Interests: materials and structures; FRP composites; precast concrete; recycled materials; conservation and strengthening of concrete and stone masonry structures; NDT tests
Dr. Hugo Biscaia
E-Mail Website
Guest Editor
Department of Civil Engineering, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal
Interests: fiber reinforced polymers (FRP); concrete; adhesively bonded interfaces; mechanical testing of materials; strengthening of existing structures; durability

Special Issue Information

Dear Colleagues,

The use of Fiber Reinforced Polymers (FRP) in structural concrete has received considerable interest in the last few decades due to their durability characteristics, high strength–weight and stiffness–weight ratios when compared to other materials. They have been mainly used in the rehabilitation and strengthening of structural elements, such as beams, slabs, columns, walls or connections. However, FRP composites have also been applied in new structural concrete elements as FRP reinforcements, as stay-in-place structural forms, or as prefabricated elements. The FRP composites used in structural concrete are mostly based on carbon fibers, but other fibers such as glass, basalt or aramid have also been subjects of research and applied in the form of wires, rods, bars, profiles, plates, sheets, fabrics, textiles or even in discontinuous fibers.

The research of FRP composites in structural concrete has been dedicated to the experimental, numerical and analytical study of the behaviour of these new materials, when subjected to axial forces, bending moments, shear, torsion, bending with axial forces or punching shear. Phenomena, such as confinement, adhesion or the global performance of the structural elements under the effects of self-weight, live loads or earthquake actions, have been analyzed. Other studies have been devoted to the evaluation of the performance of structural concrete with FRP composites subjected to fire resistance, fatigue and creep tests, or to accelerated environmental tests simulating the salt fog, freeze-thaw cycles, temperature variations or other aggressive agents for these materials.

The behavior of FRP composites in structural concrete requires, nevertheless, further studies and this Special Issue aims to become a forum for active discussion and presentation of new advances concerning this subject. The authors are encouraged to submit innovative contributions on the use of FRP composites in structural concrete. Numerical analyses, analytical solutions and experimental studies involving FRP composites in structural concrete are welcome.

Prof. Dr. Carlos Chastre
Dr. Hugo Biscaia
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Journal of Composites Science is an international peer-reviewed open access quarterly 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 1000 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

  • FRP composites
  • Structural concrete
  • Innovative strengthening solutions
  • Strengthened structures
  • Concrete Reinforced with FRP Bars
  • Stay-in-place formwork
  • Precast structures
  • Material characterization
  • Numerical, analytical and experimental analyses
  • Static response
  • Dynamic behaviour
  • Adhesively bonded interfaces
  • Debonding process
  • Fracture mechanics
  • Damage
  • Design
  • Recycling
  • Environmental effects
  • Creep
  • Fatigue

Published Papers (2 papers)

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Research

Open AccessArticle
Reinforced Concrete Corbel Strengthened Using Carbon Fiber Reinforced Polymer (CFRP) Sheets
J. Compos. Sci. 2019, 3(1), 26; https://doi.org/10.3390/jcs3010026 - 15 Mar 2019
Abstract
This paper presents and discusses the procedures adopted for repairing and strengthening a damaged reinforced concrete corbel of an industrial biomass boiler. The reinforced concrete corbel was subjected to concrete spalling, favoring the risk of the main tie reinforcement slip in the anchorage [...] Read more.
This paper presents and discusses the procedures adopted for repairing and strengthening a damaged reinforced concrete corbel of an industrial biomass boiler. The reinforced concrete corbel was subjected to concrete spalling, favoring the risk of the main tie reinforcement slip in the anchorage zone. The proposed solution involved a local repair with a polymeric mortar and subsequent strengthening using carbon fiber reinforced polymer (FRP) sheets, attending the requirements imposed by the in site conditions and the design plans. The intervention allowed the confinement of the concrete zone subjected to spalling and provided additional safety for the main tie reinforcement of the corbel. The applied technique was demonstrated to be fast, reliable, practical, and cheaper than other available solutions, such as section enlargements with concrete jacketing. Full article
(This article belongs to the Special Issue FRP Composites in Structural Concrete)
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Open AccessArticle
Axial Compressive Stress-Strain Model Developed for FRP-Confined Concrete Columns with Elliptical Cross Sections
J. Compos. Sci. 2018, 2(4), 67; https://doi.org/10.3390/jcs2040067 - 27 Nov 2018
Abstract
Most existing studies conducted on fiber-reinforced polymer (FRP)-confined concrete have considered circular and square concrete columns, while limited studies have considered columns with rectangular sections. Studies have confirmed that the circular cross-sections exhibited higher confinement effectiveness, whereas in the case of non-circular cross-sections [...] Read more.
Most existing studies conducted on fiber-reinforced polymer (FRP)-confined concrete have considered circular and square concrete columns, while limited studies have considered columns with rectangular sections. Studies have confirmed that the circular cross-sections exhibited higher confinement effectiveness, whereas in the case of non-circular cross-sections the efficiency of FRP confinement decreases with an increase of the sectional aspect ratio and there is no significant increase, particularly for columns with the aspect ratio of 2.0. As recently suggested by researchers, to significantly increase the effectiveness of FRP-confinement for these columns involves changing a rectangular section into an elliptical or oval section. According to the literature, most of the existing confinement models for FRP-confined concrete under axial compression have been proposed for columns with circular and rectangular cross-sections. However, modeling of the axial strength and strain of concrete confined with FRP in elliptical cross-sections under compression is limited. Therefore, this paper provides new expressions based on limited experimental data available in the literature. For a sufficient amount of FRP-confinement, the threshold value was proposed to be 0.02. Finally, the accuracy of the proposed model was verified by comparing its predictions with the same test database, together with those from the existing models. Full article
(This article belongs to the Special Issue FRP Composites in Structural Concrete)
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