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Shear Resistance Behavior of Exterior Beam-Column Joint with Steel Fiber Reinforced Concrete
The beam-column joint in the reinforced concrete (RC) framed structure acts as the critical part in the structure, which participates to carries large vertical and horizontal shear forces during the seismic event. The past earthquake damages demonstrate the importance of shear resistance and energy dissipation capacity of beam-column joints. The conventional transverse reinforcement detailing at the potential hinge region improves the shear capacity to a certain extent and the brittle nature of concrete limit the efficiency of the joint. Also, the critical detailing leads to steel congestion and construction difficulty. The employment of discontinuous randomly distributed steel fiber in the concrete (SFRC) offers better post-peak strain in the form of strain-softening which offers better ductility. The use of SFRC in RC elements acts as secondary shear reinforcement in resisting the shear force with improved damage tolerance and energy dissipation. This article presents an experimental study on the cyclic behavior of exterior beam-column joints with different profile steel fiber in different volumes. The joints have been prepared without critical detailing and SFRC has been used only at the joint hinge region. The hysteresis behavior of the joint specimen shows that the SFRC effectively improves the shear carrying capacity of the joint with increased ductility and damage tolerance without the need for closely spaced stirrups at the joint hinge region. The shear strength enhancement observed in the study has been validated using the available models.
Shear Resistance Behavior of Exterior Beam-Column Joint with Steel Fiber Reinforced Concrete
The beam-column joint in the reinforced concrete (RC) framed structure acts as the critical part in the structure, which participates to carries large vertical and horizontal shear forces during the seismic event. The past earthquake damages demonstrate the importance of shear resistance and energy dissipation capacity of beam-column joints. The conventional transverse reinforcement detailing at the potential hinge region improves the shear capacity to a certain extent and the brittle nature of concrete limit the efficiency of the joint. Also, the critical detailing leads to steel congestion and construction difficulty. The employment of discontinuous randomly distributed steel fiber in the concrete (SFRC) offers better post-peak strain in the form of strain-softening which offers better ductility. The use of SFRC in RC elements acts as secondary shear reinforcement in resisting the shear force with improved damage tolerance and energy dissipation. This article presents an experimental study on the cyclic behavior of exterior beam-column joints with different profile steel fiber in different volumes. The joints have been prepared without critical detailing and SFRC has been used only at the joint hinge region. The hysteresis behavior of the joint specimen shows that the SFRC effectively improves the shear carrying capacity of the joint with increased ductility and damage tolerance without the need for closely spaced stirrups at the joint hinge region. The shear strength enhancement observed in the study has been validated using the available models.
Shear Resistance Behavior of Exterior Beam-Column Joint with Steel Fiber Reinforced Concrete
Structural Integrity
Fonseca de Oliveira Correia, José António (editor) / Choudhury, Satyabrata (editor) / Dutta, Subhrajit (editor) / Gupta, Charu (author) / Rajendran, Siva Chidambaram (author) / Danie Roy, A. B. (author)
International Conference on Advances in Structural Mechanics and Applications ; 2021 ; Silchar, India
Advances in Structural Mechanics and Applications ; Chapter: 21 ; 321-335
Structural Integrity ; 19
2022-06-08
15 pages
Article/Chapter (Book)
Electronic Resource
English
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