Numerical Investigation of an RC Column Retrofitted with Steel Brace
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Bibliographic Details
| Author(s): |
Wencong Li
(Fukuoka University, Fukuoka, JAPAN)
Oh-Sung Kwon (University of Toronto, Toronto, CANADA) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 1797-1804 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818359221 | ||||
| Abstract: |
A novel seismic retrofitting method for an RC column is proposed in this paper. In the proposed retrofit method, both ends of an RC column are actively confined with steel plates and pre- tensioned high-strength external hoops. Then, a steel brace and the RC column are connected together to increase the lateral strength. The effectiveness of the retrofit technique was verified through cyclic lateral load tests. The experimental results show that the retrofitted specimen exhibits excellent seismic performance in term of strength while the non-retrofitted specimen failed in flexure-shear-critical manner. Numerical studies on the retrofitted and non-retrofitted specimens are carried out using OpenSees. For non-retrofitted specimen, shear spring element and shear limit curve are used to predict its shear-related hysteretic behavior. For retrofitted specimen, the buckling behavior of steel brace in compressive side is simulated and the sufficient ductility of steel brace in tensive side can be expected. |
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| Keywords: |
OpenSees numerical investigation seismic retrofit buckling behavior shear limit curve high-strength external hoop active confinement steel brace shear spring element
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