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

  • 제25권4호
  • /
  • Pages.83-91
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  • 2021
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  • 2234-6937(pISSN)
  • /
  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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유사동적실험에 의한 탄성패드 접합 H형 철골프레임공법으로 보강 된 기존 중·저층 R/C 골조의 내진성능 평가

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

  • 김진선 (한양대학교 대학원 건축공학과) ;
  • 이강석 (한양대학교 건축공학과 및 스마트시티공학과)
  • 투고 : 2021.07.15
  • 심사 : 2021.07.30
  • 발행 : 2021.08.30
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초록

본 연구에서는 기존 철근콘크리트 (R/C) 구조체와 내진보강 부재의 접합부의 성능을 향상시키기 위해서 접합부에 탄성패드를 가지는 새로운 H형강 철골프레임 내부접합형 내진보강공법 (H-section Steel Frame with Elastic Pad, HSFEP)을 제안하였다. HSFEP 시스템은 필요 내진보강량 산정이 간편한 내력향상형 보강공법으로서, 전단파괴가 발생할 가능성이 매우 높은 비내진상세를 가지는 중·저층 R/C 건축물에 적합한 공법이다. 본 연구에서 제안한 HSFEP 내진보강공법의 유용성을 검증하기 위하여 비내진상세를 가지는 국내 R/C 건축물을 바탕으로 실물 2층 골조 실험체를 제작하여 유사동적실험을 수행하여 최대지진응답 하중 및 변위, 지진피해정도를 중심으로 내진보강효과를 검토하였다. 실험결과 본 연구에서 개발한 HSFEP 내부접합형 내진보강법은 접합부성능이 개선되었으며, 효과적으로 수평극한내력을 증진시킴과 동시에 대지진 입력 시에도 지진응답변위를 매우 효과적으로 억제시켰다.

In this study, to improve the connection performance between the existing reinforced concrete (R/C) frame and the strengthening member, we proposed a new H-section steel frame with elastic pad (HSFEP) system for seismic rehabilitation of existing medium-to-low-rise reinforced concrete (R/C) buildings. This HSFEP strengthening system exhibits an excellent connection performance because an elastic pad is installed between the existing structure and reinforcing frame. The method shows a strength design approach implemented via retrofitting, to easily increase the ultimate lateral load capacity of R/C buildings lacking seismic data, which exhibit shear failure mechanism. Two full-size two-story R/C frame specimens were designed based on an existing R/C building in Korea lacking seismic data, and then strengthened using the HSFEP system; thus, one control specimen and one specimen strengthened with the HSFEP system were used. Pseudodynamic tests were conducted to verify the effects of seismic retrofitting, and the earthquake response behavior with use of the proposed method, in terms of the maximum response strength, response displacement, and degree of earthquake damage compared with the control R/C frame. Test results revealed that the proposed HSFEP strengthening method, internally applied to the R/C frame, effectively increased the lateral ultimate strength, resulting in reduced response displacement of R/C structures under large scale earthquake conditions.

키워드

과제정보

본 연구는 국토교통부/국토교통과학기술진흥원의 지원 (21CTAPC153033-03) 및 행정안전부 극한재난대응기반기술개발사업의 지원(2020-MOIS31-012)을 받아 수행된 연구임.

참고문헌

  1. Architectural Institute of Korea (AIK). (2018), Site Inspection and Damage Investigation of Buildings by Earthquakes in Gyoungju and Pohang, 1-347.
  2. Federal Emergency Management Agency (FEMA) 356. (2000), Prestandard and Commentary for Seismic Rehabilitation of Buildings, Washington, DC., 500.
  3. Japan Building Disaster Prevention Association (JBDPA). (2017), Guideline for Seismic Strengthening of Existing Reinforced Concrete Buildings, Tokyo, Japan, 500.
  4. Seismic Strengthening Research Group (SSRG). (2008), Seismic Strengthening of RC Buildings, Ohmsha Press, Tokyo, Japan, 230.
  5. Lee, K. S., and Jung J. S. (2018), A Seismic Capacity of R/C Building Damaged by the 2016 Gyeongju Earthquake Based on the Non-linear Dynamic Analysis, Journal of the Korea Institute of Structural Maintenance and Inspection, 22(1), 137-146. https://doi.org/10.11112/JKSMI.2018.22.1.137
  6. Lee, K. S., Wi, J. D., Kim, Y. I., and Lee, H. H. (2009), Seismic Safety Evaluation of Korean R/C School Buildings Built in the 1980s, Journal of the Korea Institute for Structural Maintenance and Inspection, 13(5), 1-11.
  7. Umemura, H. (1973), Earthquake Resistant Design of Reinforced Concrete Buildings, Accounting for the Dynamic Effects of Earthquakes, Giho-do Publishing Co., Japan.
  8. Takanashi, K., Udagawa, K., and Tanaka, H. (1980), Pseudo-Dynamic Tests on a 2-storey Steel Frame by a Computer-load Test Apparatus Hybrid System, Proceedings of the Seventh World Conference on Earthquake Engineering, Istanbul, Turkey, 7, 225-232.
  9. KS B 0801. (2017), Test pieces for tension test for metallic materials. Korean Industrial Standards, Korea.
  10. Ministry of Eduaction (MOE) and Korea Institute of Educational Environment (KIEE). (2011), Guideline for Seismic Evaluation and Rehabilitation of Existing School Buildings in Korea, 108.
  11. Korean Design Standard 41 (KDS 41). (2019), Korean design standard 41. Architectural Institute of Korea, Seoul, Korea.
  12. Lee, K. S. (2010), Seismic Capacity Requirementd for Low-Rise R/C Buildings Controlled by Both Shear and Flexure, Journal of Advanced Concrete Technology, 8(1), 75-91. https://doi.org/10.3151/jact.8.75
  13. Tokyo Soki Kenkyujo Company (TSKC). (2020), Tokyo, Japan. https://www.tml.jp/e/.
  14. MTS. (2002), Pseudodynamic testing for 793 controllers. MTS Systems Corporation, Eden Prairie, MI, USA.
  15. Hilber HM, Hughes TJ, Taylor RL. (1977), Improved numerical dissipation for time integration algorithms in structural dynamics. Earthquake Engineering and Structural Dynamics, 5(3), 283-292. https://doi.org/10.1002/eqe.4290050306
  16. Japan Building Disaster Prevention Association (JBDPA). (2015), Standard for damage level classification, Tokyo, Japan.
  17. Maeda, M., Nakano, Y., and Lee, K. S. (2004), Post-Earthquake Damage Evaluation for R/C Buildings Based on Residual Seismic Capacity, Proceedings of 13th World Conference on Earthquake Engineering, 1179, Vancouver, Canada.