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Title |
Behaviour of Lightweight Concrete Slab Reinforced with GFRP Bars under Concentrated Load
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Authors |
손병락(Byung-Lak Son) ; 김충호(Chung-Ho Kim) ; 장희석(Heui-Suk Jang) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.4.057 |
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Keywords |
GFRP 보강근 ; 경량콘크리트 ; 슬래브 실험체 GFRP bar ; Lightweight concrete ; Slab specimen |
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Abstract |
This paper is a preliminary study to apply the lightweight concrete slabs reinforced with GFRP (glass fiber reinforced polymer) bars to the bridge deck slabs or some other concrete structures. So, some different behaviors between the conventional steel reinforced concrete slab and the lightweight concrete slab reinforced with GFRP bars were investigated. For this purpose, a number of slabs were constructed and then the three point bending test and numerical analysis for these slabs were performed. The flexural test results showed that the lightweight concrete slabs reinforced with GFRP bars were failed by the shear failure due to the over-reinforced design. The weight and failure load of the GFRP bar reinforced lightweight concrete slabs were 72% and 58% of the steel reinforced concrete slab with the same dimensions, respectively. Results of the numerical analysis for these slabs using a commercial program, midas FEA, showed that the load?deflection curve could be simulated well until the shear failure of the slabs, but the applied loads and the deflections continuously increased even beyond the shear failure loads.
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