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Experimental Study on the Shear Performance of Reinforced Concrete Beams Strengthened with Bolted Side-Plating

Author

Listed:
  • Xin Liu

    (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Yu Chen

    (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Ling-Zhi Li

    (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Mei-Ni Su

    (School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester M1 3NJ, UK)

  • Zhou-Dao Lu

    (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Ke-Quan Yu

    (School of Engineering and Information Technology, The University of New South Wales, Sydney, NSW 2052, Australia)

Abstract

To investigate the residual shear capacity of post-fire bolted side-plated (BSP) reinforced concrete (RC) beams with different depths of steel plate and types of anchor adhesive, i.e., magnesium oxychloride cement (MOC) and HIT-RE500, a control beam and five BSP beams were fabricated, of which two were exposed to fire in accordance with ISO834 temperature curve. Four-point bending shear tests were conducted to investigate the influence of elevated temperature on the failure mode, cracking load, shear capacity, stiffness, ductility and strain development, etc. The shear capacities of RC beams were found to be improved significantly by using the BSP technique. However, the stiffness of BSP beams was seriously degraded after exposed to fire, but the reduction in shear capacity was negligible, whereas the ductility and the strain of longitudinal reinforcement were obviously increased. Thus, the failure-mode was changed from shear failure to flexural failure. Regarding the adhesive mortar used for bolt anchorage, magnesium oxychloride cement (MOC) achieved higher shear capacity and better ductility but lower stiffness for BSP beams compared with HIT-RE500. Additionally, increasing the depth of bolted steel plates effectively improved the shear performance of BSP beams. In the tests, uneven relative slips were observed on the plate-RC interface due to the shear deformation of bolt shafts and the plates’ tensile principal stress perpendicular to the main diagonal crack, which proved the deformation lag of the bolted steel plates with respect to the RC beam. The outcomes of this study provide a better understanding on the shear performance of BSP beams at room temperatures and at fire conditions.

Suggested Citation

  • Xin Liu & Yu Chen & Ling-Zhi Li & Mei-Ni Su & Zhou-Dao Lu & Ke-Quan Yu, 2019. "Experimental Study on the Shear Performance of Reinforced Concrete Beams Strengthened with Bolted Side-Plating," Sustainability, MDPI, vol. 11(9), pages 1-22, April.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:9:p:2465-:d:226146
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    References listed on IDEAS

    as
    1. Jun Zhou & Lu Wang, 2019. "Repair of Fire-Damaged Reinforced Concrete Members with Axial Load: A Review," Sustainability, MDPI, vol. 11(4), pages 1-16, February.
    2. Xin Liu & Zhou-Dao Lu & Ling-Zhi Li, 2018. "The Use of Bolted Side Plates for Shear Strengthening of RC Beams: A Review," Sustainability, MDPI, vol. 10(12), pages 1-15, December.
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