Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

The effect of incorporating high-strength steel rebars and debonding on the performance of reinforced ‎concrete shear walls.‎

Document Type : Original Article

Authors
Erfan Abbasvand Jahedi 1
Erfan Shafei 2
Hadi Aziziyan 3
Seyed Jamil Ghaderi 3
1 PhD Candidate, Department of Civil Engineering, Mahabad Branch, Islamic Azad University,Mahabad, Iran
2 Associate Professor, Department of Environmental Engineering, Urmia University of Technology, Urmia, Iran.
3 Assistant Professor, Department of Civil Engineering, Mahabad Branch Islamic Azad University, Mahabad, Iran
10.22065/jsce.2024.445224.3364
Abstract
Nowadays, the use of high-strength steel rebars has gained wide application in concrete shear walls due to ‎their ability to withstand high stresses at low strains and reduce construction costs. Despite their ‎excellent performance in resisting lateral loads and earthquakes, concrete shear walls may experience ‎premature failure at the longitudinal rebar connection due to rebar slippage. Rebar slippage can ‎significantly reduce the seismic performance of the concrete shear wall. One solution to enhance the ‎seismic performance is the use of debonding technique for longitudinal rebars in the wall. debonding, by ‎delaying rebar slippage, it can increase energy absorption and improve the ductility of the structure.‎

In this study, to investigate the effectiveness of the debonding technique on high-strength rebars, eight ‎groups were selected, each consisting of three models of concrete shear walls with an aspect ratio of ‎‎3.1, varying in terms of rebar diameter, percentage of shear reinforcement, and steel bar debonding. ‎The models were analyzed using the finite element method with VecTor2 software under cyclic loading. ‎Overall, the incorporation of the debonding technique for longitudinal rebars in concrete shear walls ‎provides a promising approach to enhance their seismic performance. By improving energy absorption ‎and ductility, this technique contributes to the overall structural integrity and safety of the concrete ‎shear wall system.‎
Keywords
high strength steel rebar
concrete shear wall
rebar strain
debonding
confinement of concrete

Subjects

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  • Receive Date 26 February 2024
  • Revise Date 14 August 2024
  • Accept Date 05 September 2024