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Seismic Performance of Circular RC Bridge Columns with Longitudinal Steel Connection Details
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 Title & Authors
Seismic Performance of Circular RC Bridge Columns with Longitudinal Steel Connection Details
Lee Jae-Hoon; Son Hyeok-Soo; Ko Seong-Hyun;
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 Abstract
The longitudinal steel connection of reinforced concrete bridge column is sometimes practically unavoidable, however the current Korean bridge design specifications have no special provisions about lap-splices of longitudinal steel. This paper reports experimental results of a research program investigating the seismic performance of circular RC bridge columns with respect to longitudinal steel connection detailing. Twenty-one circular column specimens were tested under quasi-static test. The columns with the entire longitudinal steel lap-spliced within plastic hinge region show relatively sudden strength degradation and low ductility than the columns with continuous longitudinal steel and the columns with half of longitudinal steel lap-spliced. However, the seismic performance of the column with mechanically connected longitudinal steel is similar to that of the column with continuous longitudinal steel. The final objectives of this study are to suggest appropriate longitudinal reinforcement connection details for the limited ductility design concept and to provide quantitative reference data and tendency for performance or damage assessment based on the performance levels such as cracking, yielding, collapse, etc. Ultimate displacement/drift ratio, displacement ductility, response modification factor, equivalent viscous damping ratio, residual deformation index, and effective stiffness are investigated and discussed in this paper.
 Keywords
circular bridge columns;longitudinal steel connection details;seismic performance;ductility;equivalent viscous damping ratio;
 Language
Korean
 Cited by
1.
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한국콘크리트학회논문집, 2004. vol.16. 5, pp.697-707 crossref(new window)
2.
원형 철근콘크리트 교각의 내진성능 I. 심부구속철근비 영향 변수 평가,이대형;박창규;김현준;정영수;

한국콘크리트학회논문집, 2005. vol.17. 4, pp.603-611 crossref(new window)
3.
원형 철근콘크리트 교각의 내진성능 II. 심부구속철근비 제안,박창규;이대형;이범기;정영수;

한국콘크리트학회논문집, 2005. vol.17. 5, pp.775-784 crossref(new window)
4.
내진 모사하중에 의한 스테인레스강 와이어 보강 교각의 응답,최준혁;김성훈;이도형;

한국강구조학회 논문집, 2009. vol.21. 4, pp.343-350
5.
비내진 벽식 교각의 내진성능 및 보강개념,이재훈;최영호;박광순;주형석;

한국지진공학회논문집, 2009. vol.13. 6, pp.87-98 crossref(new window)
6.
축방향철근의 겹침이음길이에 따른 원형 RC교각의 내진성능평가,박광순;서형열;김태훈;김익현;선창호;

한국지진공학회논문집, 2014. vol.18. 4, pp.201-212 crossref(new window)
1.
Seismic Performance Assessment of Existing Circular Sectional RC Bridge Columns according to Lap-splice Length of Longitudinal Bars, Journal of the Earthquake Engineering Society of Korea, 2014, 18, 4, 201  crossref(new windwow)
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