Shear Resistance Mechanism of RC Column Retrofitted by using PC Bars
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Bibliographic Details
| Author(s): |
Kozo Nakada
Yoichi Morishita Sanae Uehara Tetsuo Yamakawa |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013 | ||||
| Published in: | IABSE Conference, Rotterdam, May 2013 | ||||
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| Page(s): | 82-83 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2013 | ||||
| DOI: | 10.2749/222137813806474318 | ||||
| Abstract: |
It is a known fact that the compressive strength and ductility of concrete can be considerably improved by lateral confinement. In this study, a ductility-type seismic retrofitting technique of RC columns by utilizing high-strength steel bars (PC bars) prestressing was applied, which is arranged on the four faces of the RC columns as external hoops. Hence, active confinement due to the tensile forces in the PC bars as well as passive confinement and transverse reinforcement can be expected. Recent axial compression tests showed that the active and passive confinement using PC bar prestressing can considerably improve the stress–strain characteristics of confined concrete. In this paper, the shear resistance mechanism and shear strength of RC columns retrofitted using PC bar prestressing was experimentally investigated under constant axial force and cyclic lateral forces. |
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| Keywords: |
shear strength prestress seismic retrofit truss mechanism arch mechanism
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