Abstract
Corrosion of steel reinforcement in concrete structures is one of the main challenges for the construction industry. FRP reinforcement could be used as alternative to steel reinforcement providing several advantages, such as high resistance to corrosion, high tensile strength and opportunity for developing a more ductile mode of destruction. The last characteristic is extremely beneficial in the aspect of lateral load resisting systems including RC shear walls. The presented modelling results consist of preparing finite element models of reinforced concrete shear walls utilizing Ansys 19.2 - Solid65 element which is capable of both cracking and crushing. The results were verified with experimental medium-scale concrete shear walls reinforced with steel and BFRP bars. The models were loaded under cyclic lateral loading following a modified ATC (Applied Technology Council guidelines for seismic testing) 24 protocol. BFRP reinforced models developed similar ultimate capacity and significantly higher energy dissipation in comparison with steel reinforced models. The promising results could provide a momentum toward construction of shear walls using FRP reinforcement with the aims of improving durability and energy dissipation.
Highlights
The problem of steel corrosion in concrete structures can be overcome by alternative reinforcement of Fibre Reinforced Polymers (FRP) bars
Change in the traditional design philosophy of concrete structures is needed for FRP reinforcement as mechanical behaviour of FRP reinforcement differs from the behaviour of conventional steel reinforcement
FRP materials do not yield and they are elastic until failure and the design procedure must account for a lack of ductility in structural concrete members reinforced with FRP bars [2]
Summary
The problem of steel corrosion in concrete structures can be overcome by alternative reinforcement of Fibre Reinforced Polymers (FRP) bars. There are areas where there is limited knowledge of the performance of FRP reinforcement including fire-resistance, durability in outdoor or severe exposure conditions, bond fatigue, and bond lengths for lap splices. These are the areas which need further research and additional information according to the ACI 440 committee report on FRP reinforcement (ACI, 2006). Mohamed et al, [1] evaluated GFRP reinforced shear walls by conducting experiments on concrete shear walls reinforced with GFRP bars The outcome of those studies shows that GFRP reinforced shear walls are capable of higher energy dissipation in comparison with steel reinforced shear walls [1]
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