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Impact resistant behaviour of RC slab strengthened with FRP sheet

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Abstract

To investigate the impact resistance of RC slabs strengthened with Fibre Reinforced Plastic (FRP) sheet to the back of the slab, falling-weight impact tests were conducted. Two loading types were applied: iterative loading and single loading. The impact load was applied to the centre of the RC slab with a free falling 300 kg steel striker with a diameter of 60 mm. A total of 12 RC slabs that were 1,650 (L) × 1,650 (W) × 150 (h) mm were used for these experiments. In this study, the strengthening method and material properties of the FRP sheet and the number of FRP sheet layers were varied. The results obtained from this study are as follows: (1) the impact resistance of the RC slabs can be improved by attaching a strengthened FRP sheet to the back surfaces; (2) the load bearing mechanism of RC slabs depends on the loading type and strengthening volume of the FRP sheet; and (3) the dynamic amplification factor is about two, which is independent of the load bearing mechanism of the RC slab and the strengthening volume and tensile rigidity of the FRP sheet.

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Authors and Affiliations

  1. Department of Earthquake Engineering, School of Civil and Environmental Engineering, National University of Sciences & Technology, NUST, Islamabad, Pakistan

    Abdul Qadir Bhatti

  2. Civil Engineering, Muroran Institute of Technology, Muroran, 050-8585, Japan

    Norimitsu Kishi

  3. Department of Civil Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore

    Kiang Hwee Tan

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  1. Abdul Qadir Bhatti
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  2. Norimitsu Kishi
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  3. Kiang Hwee Tan
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Correspondence to Abdul Qadir Bhatti.

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Bhatti, A.Q., Kishi, N. & Tan, K.H. Impact resistant behaviour of RC slab strengthened with FRP sheet. Mater Struct 44, 1855–1864 (2011). https://doi.org/10.1617/s11527-011-9742-9

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