Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Experiments on Flexural Performance of Composite Members Strengthened by External Steel Plates

외부 강재 보강으로 구성한 합성 부재의 휨 성능에 대한 실험

  • Received : 2022.09.26
  • Accepted : 2022.09.30
  • Published : 2022.10.30
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Abstract

This paper presents an experimental study on the flexural performance of concrete members strengthened with external steel plates for the purpose of improving seismic performance. In order to strengthen the structure, a strengthening method was applied that wraps the walls and columns with steel members. The partial section of the wall with the longest span in the structure was manufactured in real size and the strengthening effect was confirmed by performing a static load test. As a result of the experiment, it was confirmed that the strengthened section exhibited sufficient flexural performance satisfied to the seismic requirements, but the behavior until failure was not obtained because of actuator capacity. It was confirmed that the strengthened member resists the out-of-plane moment with a composite behavior. It was verified that the stiffness and load carrying capacity of the strengthened member were improved compared to the non-strengthened member by displacement and strain measurements.

이 논문은 내진 성능 향상 목적으로 외부 강재로 보강한 콘크리트 부재의 휨 성능에 대한 실험적 연구이다. 구조물을 보강하기 위하여 벽과 기둥을 보강재로 감싸는 형식의 보강 방법을 적용하였는데, 이 구조물에서 가장 긴 지간을 갖는 벽체 일부 단면을 실물 크기로 제작하여 정적 재하 실험을 수행하는 방법으로 강성 보강효과를 확인하였다. 실험 결과, 보강 단면은 충분한 보강 성능을 발현하는 것을 확인하였으나, 가력기의 용량 부족과 안전상의 문제로 파괴까지의 거동을 확인하지는 못하였다. 보강재가 벽체에 작용하는 면외방향 모멘트를 효과적으로 부담하고 있는 것을 확인하였고, 측정된 변위와 철근 변형률 등의 분석을 통하여 보강 전 부재에 비하여 부재 강성과 휨모멘트 저항능력이 향상되었음을 검증하였다.

Keywords

References

  1. Yun Yong Kim, Bang Yeon Lee, Jin Wook Bang, Byung-Chan Han, Luciano Feo, Chang-Geun Cho, (2014), Flexural Performance of Reinforced Concrete Beams Strengthened with Strain-Hardening Cementitious Composite and High Strength Reinforcing Steel Bar, Composites Part B: Engineering, 56, Jan., 2014, 512-519. https://doi.org/10.1016/j.compositesb.2013.08.069
  2. Jamshaid Sawab, C. H. Luu, Xin Nie, Ing Lim, Y. L. Mo, and Mo Li. (2016), Structural integrity of steel plate ultra high-performance concrete modules, Journal of Structural Integrity and Maintenance, 1(3), 95-106 https://doi.org/10.1080/24705314.2016.1211236
  3. Jung-Hwan Hyun, Jin-Wook Bang, Bang-Yeon Lee, Yun-Yong Kim. (2021), Effects of the Replacement Length of Concrete with ECC on the Cyclic Behavior of Reinforced Concrete Columns, Materials, 2021, 14, 3542.
  4. Sang-Hyun Kim, Woo-Tai Jung, Jae-Yoon Kang, Hee-Beom Park, Jong-Sup Park. (2021), Experimental Study on the Strengthening Effect of External Prestressing Method Considering Deterioration, Journal of the Korea Institute for Structural Maintenance and Inspection, 25(1), 1-6. https://doi.org/10.11112/JKSMI.2021.25.1.1
  5. Seung-Hyeon Hwang, Keun-Hyeok Yang, Sanghee Kim (2021), In-plane and Out-of-plane Seismic Performances of Masonry Walls Strengthened with Steel-Bar Truss Systems, Journal of the Korea Institute for Structural Maintenance and Inspection, 25(1), 16-24. https://doi.org/10.11112/JKSMI.2021.25.1.16
  6. Sang-Su Ha (2019), Flexural Strengthening Effects of RC Beam Reinforced with Pre-stressing Plate, Journal of the Korea Institute for Structural Maintenance and Inspection, 23(1), 171-178. https://doi.org/10.11112/JKSMI.2019.23.1.171
  7. Jae-Hyung Lim, Jeong-Ho Moon, Jae-Yeon Lee (2009), Flexural Capacity of Reinforced Concrete Beams Strengthened by Bow System, Journal of the Korea Institute for Structural Maintenance and Inspection, 13(3), 181-187.
  8. Sang-Su Ha (2018), Theoretical Analysis for Strengthening Effects of RC Beam with Reinforced FRP Sheet, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(4), 100-107. https://doi.org/10.11112/JKSMI.2018.22.4.100
  9. Jin-Seon Kim, Kang-Seok Lee (2021), Seismic Capacity Evaluation of Existing Medium-and low-rise R/C Frame Retrofitted by H-section Steel Frame with Elastic Pad Based on Pseudo-dynamic testing, Journal of the Korea Institute for Structural Maintenance and Inspection, 25(4), 83-91. https://doi.org/10.11112/JKSMI.2021.25.4.83
  10. Taek-Hee Han, Sung-Nam Kim, Young-jong Kang (2007), Evaluation of Seismic Performance for an Internally Confined Hollow CFT Column, Journal of Korean Society of Steel Construction, 19(1), 53-65.
  11. Chang-Su Shim, Young-Soo Chung, Ji-Ho Park, Chang-Young Park (2007), Seismic performance evaluation of circular composite columns by shaking table test, Journal of the Earthquake Engineering Society of Korea, 11(5), 77-81.
  12. Kae-Hwan Kwak, Hwa-Sup Jang, Woo-Jong Kim, Hoi-Ok Kim (2008), A Study on Shear Strength Test for FRP Girder of Filled Concrete, Journal of the Computational Structural Engineering Institute of Korea , 21(4), 365-373.
  13. Hyuck-Jin Kwon, Keun-Hyeok Yang, Hang-Yong Byun (2018), Evaluation of Seismic Strengthening Approach at the Boundary Elements of RC Walls using Prestressed Wire Rope Units, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(1), 56-63, https://doi.org/10.11112/JKSMI.2018.22.1.056