Bolted and Bonded Joints in Fibre Reinforced Polymer Structures

A special issue of Technologies (ISSN 2227-7080). This special issue belongs to the section "Construction Technologies".

Deadline for manuscript submissions: closed (30 November 2015) | Viewed by 13742

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Special Issue Editors

Prof. Dr. Luciano Feo

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Guest Editor

Department of Civil Engineering, University of Salerno, 900527 Fisciano, SA, Italy
Interests: mechanics of solids and structures; multiscale mechanics; computational mechanics; advanced mechanical modeling of new materials and structures; innovative composite materials
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Dr. Francesco Ascione

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Guest Editor

Department of Civil Engineering, University of Salerno, 84084 Fisciano, Italy
Interests: multiscale modeling; buckling; connection technologies for fiber composite materials; strengthening of concrete structures by FRP, SRP and FRCM; coatings; high performance fiber reinforced concrete; sustainability

Special Issue Information

Dear Colleagues,

As is well-known, for decades, civil engineers have dealt with different types of composite materials, including wood (natural composites), plywood (laminated natural composites), and concrete (particular composites). The noteworthy mechanical properties of advanced composite materials, for instance, high values of specific stiffness, specific strength, and high corrosion resistance, have made these materials very appealing for civil engineering applications. In recent years, several major national and international research programs were launched to investigate the feasibility of using advanced polymer composites on both seismic and environment-sensitive fields. This includes the use of fiber reinforced polymer (FRP) composites as internal/or external reinforcement, as well as building entire structures, such as bridges and industrial frame-structures, from FRP materials. The main aim of this Special Issue is to cover a wide range of critical topics concerning the connections between structural FRP members.

Luciano Feo
Francesco Ascione
Guest Editors

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Keywords

micro
macro modeling mechanical characterization overall performance durability
long term behavior analysis
design

Published Papers (3 papers)

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Research

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11860 KiB

Open AccessArticle

An Experimental/Numerical Study on the Interfacial Damage of Bonded Joints for Fibre-Reinforced Polymer Profiles at Service Conditions

by Agostina Orefice, Geminiano Mancusi, Serge Dumont and Frédéric Lebon

Technologies 2016, 4(3), 20; https://0-doi-org.brum.beds.ac.uk/10.3390/technologies4030020 - 12 Jul 2016

Cited by 9 | Viewed by 4384

Abstract

In this paper a study on double lap joints made of glass fibre-reinforced polymer (GFRP) adherents and an epoxy resin as a glue is performed. Both an experimental procedure and a theoretical model with an associated numerical discretization are presented. Experimental and numerical results are discussed and compared. They indicate the possibility of performing an advanced mechanical analysis of adhesive joints based on a preliminary characterization of a few mechanical parameters. Full article

(This article belongs to the Special Issue Bolted and Bonded Joints in Fibre Reinforced Polymer Structures)

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2140 KiB

Open AccessArticle

Experimental Tests on Steel Plate-to-Plate Splices Bonded by C-FRPS Laminas with and without Wrapping

by Mario D’Aniello, Francesco Portioli and Raffaele Landolfo

Technologies 2016, 4(1), 5; https://0-doi-org.brum.beds.ac.uk/10.3390/technologies4010005 - 15 Feb 2016

Cited by 1 | Viewed by 3983

Abstract

The results of an experimental investigation carried out on steel splices bonded by (Carbon-Fiber–Reinforced Polymers) C-FRPs are presented in this paper. The main aim of the study is to examine the influence of different parameters on the type of failure and on the ductility of splices. Different configurations of the specimens were considered, including butt and lapped joints using different arrangements for end anchorage of the bonded C-FRP laminas, such as (i) external bonding; and (ii) anchored jacketing with C-FRP sheets transversally wrapped to the longitudinal axis of the joints. The results in terms of failure modes and response curves are described and discussed, highlighting the potentiality of these types of bonded connections for metal structures. In particular, experimental results showed that (i) the failure modes exhibited by both butt and lapped wrapped splices were substantially similar; (ii) the wrapped anchoring is beneficial in order to achieve large deformations prior to failure, thus allowing a satisfactory ductility, even though a more timely installation process is necessary. Full article

(This article belongs to the Special Issue Bolted and Bonded Joints in Fibre Reinforced Polymer Structures)

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Other

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2421 KiB

Open AccessConcept Paper

C-Anchor for Strengthening the Connection between Adhesively Bonded Laminates and Concrete Substrates

by Ghani Razaqpur and Ahmed B. Mostafa

Technologies 2015, 3(4), 238-258; https://0-doi-org.brum.beds.ac.uk/10.3390/technologies3040238 - 30 Nov 2015

Cited by 8 | Viewed by 4882

Abstract

A new carbon fiber reinforced polymer (CFRP) anchor is developed and tested to delay debonding in reinforced concrete (RC) beams externally strengthened with FRP laminate/sheet. The C-shape anchor is made from a commercially available CFRP grid. The anchors legs are 95 mm long while the spacing between the legs is adjustable, depending on FRP laminate and beam widths. Nine full scale RC beams, 3.0 m long, 250 mm wide and 400 mm deep, were strengthened with CFRP laminate/sheet, with and without the C-anchor. The main test parameters were the type and amount of FRP laminate and the presence/absence of the anchor. Test results showed that beams with the anchor had generally 5%–10% higher debonding and failure load, and they reached higher deflection at failure than the companion beams without anchors. Although complete separation of the FRP laminate from the concrete was not observed in any of the beams with anchors, there was noticeable slip at failure at one end of the laminate. A significant outcome of the study is that anchors are effective in limiting the extent of debonding along the laminate, thus contributing to the flexural stiffness of the beam by reducing the extent of cracking and limiting the crack width along the beam. Finally, the anchor allowed the FRP to reach or exceed its theoretically allowable strain computed based on the American Concrete Institute (ACI) Committee 440 recommendation while in none of the beams without anchors, the FRP reached its theoretically allowable strain. Full article

(This article belongs to the Special Issue Bolted and Bonded Joints in Fibre Reinforced Polymer Structures)

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