Experimental Study on the Development of a Seismic Reinforcement Method for Reinforced Concrete Columns using High-tensile Alloy Materials

doi:10.15683/kosdi.2024.6.30.411

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2024 Vol.20, Issue 2 Preview Page Next Page

Original Article

Experimental Study on the Development of a Seismic Reinforcement Method for Reinforced Concrete Columns using High-tensile Alloy Materials 고인장 합금재를 활용한 철근콘크리트 기둥의 내진보강공법 개발에 관한 실험적 연구: 김도연¹ㆍ장일영²*
Do-Yeon Kim¹, Il-Young Jang²*; ¹Ph.D Candidate, Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
²Professor, Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea

30 June 2024. pp. 411-418

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Abstract

Purpose: This study aims to develop brand new bolt fastening type of seismic retrofit using high tensile alloy materials for existing reinforced concrete columns. Method: A T-type cross-sectional seismic retrofit made of SUS304 and SS275, and the high-tensile bolt of SCM435 was analyzed for the effect of material properties on seismic performance through bending test. Result: The experiment using SUS304 shows a 7% higher maximum strength and 22% higher yield strength and shows a higher compressive stress of 360MPa. In addition, the change in the neutral axis is also smaller. Conclusion: Seismic retrofit using SUS304 is considered to be better in terms of yield strength, tensile strength, neutral axis change, and ductility, and it is considered necessary to experiment with RC column real experiments in future studies.

Keywords

Seismic Reinforcement

Bolt Fastened Type

Reinforced Concrete Column

High Tensile Alloy Material

Bending Test

연구목적: 본 연구에서는고인장 합금재를 활용하여 기존 철근콘크리트 기둥의 내진성능 향상이 가능한 새로운 형식의 볼트 체결식 내진보강재를 개발하고자 한다. 연구방법: 고인장 합금재인 SUS304 및 일반 구조용 강재인 SS275를 이용하여 T형 단면 강판을 제작하고 이를 SCM435의 고장력 볼트로 체결한 내진보강재 실험체를 제작하여 휨 실험을 통해 재료적 특성이 내진 보강성능에 미치는 영향에 대해 비교 분석한다. 연구결과: SUS304를 사용한 실험체가 7% 높은 최대 강도와 22% 높은 항복 강도를 보이며, 360MPa 더 높은 압축응력을 나타낸다. 또한 중립축의 변화도 더 미소하여 더 우수한 내력을 가진 것으로 판단된다. 결론: 동일한 단면에서 SUS304를 사용한 내진보강재가 휨 강도, 항복강도, 인장강도, 중립축 변화, 연성능력 측면에서 더 우수한 것으로 판단되며 추후 연구에서 철근콘크리트 기둥 실물 실험체에 적용함으로써 기둥-보강재간 일체 거동에 대한 실험이 필요하다고 사료된다.

키워드

내진보강

볼트 체결식

콘크리트 기둥

고인장 합금재

구조성능 실험

References

Afifi, M.Z., Mohamed, H.M., Chaallal, O., Benmokrane, B. (2015). "Confinement model for concrete columns internally confined with carbon FRP spirals and hoops." Journal of Structural Engineering, Vol. 141, No. 9, 04014219. 10.1061/(ASCE)ST.1943-541X.0001197
Byun, H.S. (2020). Study on Displacement·Ductility and Load Bearing Capacity Enhancement Effect of Square Column with Continuous Transverse Reinforcements. Ph.D. Dissertation, Yonsei University.
Chae, K.S. (2018). Study on Method of Continuous Transverse Stirrup for ductility of Rectangular Cross-section RC Column. Master Thesis, Yonsei University.
Kim, J.B. (1999). An Experimental Study on Strengthening Effect of Reinforced Concrete Columns Strengthened with Steel Plates. Ph.D. Dissertation, Konkuk University.
Kim, S.K. (2010). Anti-Seismic Reinforcement Performance Evaluation of Circular Pier by Helical Bar. Master Thesis, Kumoh National Institute of Technology.
Korea Meteorological Administration (2020). 2019 Earthquake Annals.
Lee, D.M. (2020). Seismic Capacity Analytical Evaluation of RC Columns Strengthened with NBR Method. Master Thesis, Kyungpook National University.
Mander, J.B., Priestley, M.J., Park, R. (1988). "Theoretical stress-strain model for confined concrete." Journal of Structural Engineering, Vol. 114, No. 8, pp. 1804-1826. 10.1061/(ASCE)0733-9445(1988)114:8(1804)
Ministry of Land, Infrastructure and Transport (2016). Bridge Construction Specification.
Ministry of Land, Infrastructure and Transport (2016). Highway Bridge Design Standard (Limit State Design).
Ministry of Land, Infrastructure and Transport (2020). Enforcement Decree of the Building Act.
Sheikh, S.A., Yeh, C.C. (1992). "Analytical moment-curvature relations for tied concrete columns." Journal of Structural Engineering, Vol. 118, No. 2, pp. 529-544. 10.1061/(ASCE)0733-9445(1992)118:2(529)
Shin, M.J. (2011). A Study on the Seismic Performance of the Strengthened RC Column with Aramid Fiber. Master Thesis, University of Science and Technology.

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 20
No :2
Pages :411-418
DOI :https://doi.org/10.15683/kosdi.2024.6.30.411

[1] Afifi, M.Z., Mohamed, H.M., Chaallal, O., Benmokrane, B. (2015). "Confinement model for concrete columns internally confined with carbon FRP spirals and hoops." Journal of Structural Engineering, Vol. 141, No. 9, 04014219. 10.1061/(ASCE)ST.1943-541X.0001197

[2] Byun, H.S. (2020). Study on Displacement·Ductility and Load Bearing Capacity Enhancement Effect of Square Column with Continuous Transverse Reinforcements. Ph.D. Dissertation, Yonsei University.

[3] Chae, K.S. (2018). Study on Method of Continuous Transverse Stirrup for ductility of Rectangular Cross-section RC Column. Master Thesis, Yonsei University.

[4] Kim, J.B. (1999). An Experimental Study on Strengthening Effect of Reinforced Concrete Columns Strengthened with Steel Plates. Ph.D. Dissertation, Konkuk University.

[5] Kim, S.K. (2010). Anti-Seismic Reinforcement Performance Evaluation of Circular Pier by Helical Bar. Master Thesis, Kumoh National Institute of Technology.

[6] Korea Meteorological Administration (2020). 2019 Earthquake Annals.

[7] Lee, D.M. (2020). Seismic Capacity Analytical Evaluation of RC Columns Strengthened with NBR Method. Master Thesis, Kyungpook National University.

[8] Mander, J.B., Priestley, M.J., Park, R. (1988). "Theoretical stress-strain model for confined concrete." Journal of Structural Engineering, Vol. 114, No. 8, pp. 1804-1826. 10.1061/(ASCE)0733-9445(1988)114:8(1804)

[9] Ministry of Land, Infrastructure and Transport (2016). Bridge Construction Specification.

[10] Ministry of Land, Infrastructure and Transport (2016). Highway Bridge Design Standard (Limit State Design).

[11] Ministry of Land, Infrastructure and Transport (2020). Enforcement Decree of the Building Act.

[12] Sheikh, S.A., Yeh, C.C. (1992). "Analytical moment-curvature relations for tied concrete columns." Journal of Structural Engineering, Vol. 118, No. 2, pp. 529-544. 10.1061/(ASCE)0733-9445(1992)118:2(529)

[13] Shin, M.J. (2011). A Study on the Seismic Performance of the Strengthened RC Column with Aramid Fiber. Master Thesis, University of Science and Technology.

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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