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Strengthening of two-way concrete slabs with FRP composite laminates

Strengthening of two-way concrete slabs with FRP composite laminates,10.1016/S0950-0618(02)00092-2,Construction and Building Materials,Ayman S. Mosall

Strengthening of two-way concrete slabs with FRP composite laminates   (Citations: 18)
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This paper presents an experimental and analytical investigation for evaluating the ultimate response of unreinforced and reinforced concrete slabs repaired and retrofitted with fiber reinforced polymer (FRP) composite strips. A uniformly distributed pressure was applied to several two-way large-scale slab specimens using a high-pressure water bag. Both carbon/epoxy and E-glass/epoxy composite systems were used in this study. In predicting the behavior of the repaired slabs, the finite element method was used. Comparison between the experimental and the analytical results indicated the validity of the computational models in capturing the experimentally determined results for both the control and the rehabilitated slabs. For repair applications, test results indicated that both FRP systems were effective in appreciably increasing the strength of the repaired slabs to approximately five times that of the as-built slabs. For retrofitting applications, use of FRP systems resulted in appreciable upgrade of the structural capacity of the as-built slabs up to 500% for unreinforced specimens and 200% for steel reinforced specimens.
Journal: Construction and Building Materials - CONSTR BUILD MATER , vol. 17, no. 1, pp. 43-54, 2003
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    • ...In addition, FRPs were used for the flexural strengthening of two-way slabs using FRP sheets bonded along the middle of the slab (Ebead and Marzouk 2004, Harajli and Soudki 2003) or distributed along the slab width (Mosallam and Mosalam 2003, Limam et al. 2003)...

    K. W. Nealeet al. MODELLING OF DEBONDING PHENOMENA IN FRP-STRENGTHENED CONCRETE BEAMS AN...

    • ...In this study, a simple descending line is used to model this tension stiffening phenomenon (Fig. 4). The value of the strain ε* at which the tension stiffening stress reduced to zero is 0.0006 determined by calibrating with the experimental data (Mosallam and Mosalam, 2003) in the analytical model...
    • ...The validity of the these material models to simulate the composite behavior of reinforced concrete slab strengthened by FRP is examined in this section by comparing with the result of slab experiment performed by Mosallam and Mosalam (2003)...
    • ...Its elastic modulus in initial linear elastic region is assumed to be 199.9 GPa (29000 ksi) and the elastic modulus in strain hardening region is smaller than that of the initial elastic region by a factor of 33 (Mosallam and Mosalam, 2003)...
    • ...mm (0.023 inch) in thickness and with tensile strength Xut=1208.7 MPa and modulus E11=100.75 GPa (Mosallam and Mosalam, 2003)...

    Fu-Ming Linet al. Strengthening of Square Reinforced Concrete Plates with Fiber Reinforc...

    • ...<{[SECTION]}>2 <{[SECTION]}>, (10) Due to the various applications of the bond–slip model to FRP-strengthened slabs with different configurations, it is obvious that the interfacial fracture energy is less affected by the FRP stiffness; however, it is affected by the mechanical properties of the concrete...

    W. E. El Sayedet al. Modelling of Debonding Failures in FRP-Strengthened Two-Way Slabs

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