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  Volume 2, Number 2, May 2020, pages 87-101
DOI: http://dx.doi.org/10.12989/cme.2020.2.2.087
 
open access

Analysis of interfacial stresses distribution in steel beams strengthened with thin composite plates and subjected to the thermo-mechanical loading
Ismail Bensaid, Bachir Kerboua and Mohamed Azzeddine Kadache

 
Abstract
    Nowadays, the use of carbon fiber reinforced plastics (CFRP) plates for strengthening and repairing of structures degraded by their environment have attracted growing interest and are considered to be the most promising materials for applications in structural engineering. One of the main features of the reinforced beam is the significant stress concentration in the adhesive at the ends of CFRP plate; consequently, debonding failure may occur at the plate ends due to a combination of high shear and normal interfacial stresses. These stresses between a beam and a soffit plate, within the linear elastic range, have been addressed by numerous analytical investigations. This paper provides an analytical model for prediction of interfacial stresses in a reinforced steel beam under mechanical as well as thermal loads. The combined effects of the interface slip and both adherend shear deformations on the structural behavior are also incorporated in the current investigation. The present new model needs only one differential equation to determine both shear and normal interfacial stress whereas the others solutions need two differential equations. To verify the validity of the present model, the results are compared with those available in the literature. The effects of the physical and geometric parameters of the CFRP plate and adhesive layer on the maximum values of the interfacial stresses distributions are investigated.
 
Key Words
    bi-material interface; adhesive bonding; thermal effects; interface slip; externally bonded plates; interfacial stresses; adherend deformation; strengthening
 
Address
Ismail Bensaid: IS2M Laboratory, Faculty of Technology, Mechanical engineering Department, University of Abou Beckr Belkaid (UABT), Tlemcen, Algeria
Bachir Kerboua: Faculty of Technology, Mechanical engineering Department, University of Abou Beckr Belkaid (UABT), Tlemcen, Algeria
Mohamed Azzeddine Kadache: IS2M Laboratory, Faculty of Technology, Mechanical engineering Department, University of Abou Beckr Belkaid (UABT), Tlemcen, Algeria
 

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