Structural Engineering and Mechanics

  • 제65권5호
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  • Pages.535-546
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  • 2018
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Analytical and numerical studies on hollow core slabs strengthened with hybrid FRP and overlay techniques

  • Kankeri, Pradeep (Department of Civil Engineering, Vardhaman College of Engineering) ;
  • Prakash, S. Suriya (Department of Civil Engineering, Indian Institute of Technology) ;
  • Pachalla, Sameer Kumar Sarma (Department of Civil Engineering, Mahindra Ecole Centrale)
  • 투고 : 2017.04.01
  • 심사 : 2018.01.03
  • 발행 : 2018.03.10
⟨ 이전 논문 다음 논문 ⟩

초록

The objective of this study is to understand the behaviour of hollow core slabs strengthened with FRP and hybrid techniques through numerical and analytical studies. Different strengthening techniques considered in this study are (i) External Bonding (EB) of Carbon Fiber Reinforced Polymer (CFRP) laminates, (ii) Near Surface Mounting (NSM) of CFRP laminates, (iii) Bonded Overlay (BO) using concrete layer, and (iv) hybrid strengthening which is a combination of bonded overlay and NSM or EB. In the numerical studies, three-dimensional Finite Element (FE) models of hollow core slabs were developed considering material and geometrical nonlinearities, and a phased nonlinear analysis was carried out. The analytical calculations were carried out using Response-2000 program which is based on Modified Compression Field Theory (MCFT). Both the numerical and analytical models predicted the behaviour in agreement with experimental results. Parametric studies indicated that increase in the bonded overlay thickness increases the peak load capacity without reducing the displacement ductility. The increase in FRP strengthening ratio increased the capacity but reduced the displacement ductility. The hybrid strengthening technique was found to increase the capacity of the hollow core slabs by more than 100% without compromise in ductility when compared to their individual strengthening schemes.

키워드

참고문헌

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