Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Performance Evaluation of Non-Seismic Reinforced Concrete Buildings Strengthened by Perimeter Steel Moment Frame

철골 모멘트골조로 보강된 철근콘크리트 건물의 내진성능 평가

  • Kim, Seonwoong (Department of Architectural Engineering, Youngsan University)
  • 김선웅 (영산대학교 건축공학과)
  • Received : 2020.06.23
  • Accepted : 2020.08.07
  • Published : 2020.09.01
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Abstract

This paper is to investigate the retrofitting effect for a non-seismic reinforced concrete frame strengthened by perimeter steel moment frames with indirect integrity, which ameliorates the problems of the direct integrity method. To achieve this, first, full-scale tests were conducted to address the structural behavior of a two-story non-seismic reinforced concrete frame and a strengthened frame. The non-seismic frame showed a maximum strength of 185 kN because the flexural-shear failure at the bottom end of columns on the first floor was governed, and shear cracks were concentrated at the beam-column joints on the second floor. The strengthened frame possessed a maximum strength of 338 kN, which is more than 1.8 times that of the non-seismic specimen. A considerable decrease in the quantity of cracks for the strengthened frame was observed compared with the non-seismic frame, while there was the obvious appearance of the failure pattern due to the shear crack. The lateral-resisting capacity for the non-seismic bare frame and the strengthened frame may be determined per the specified shear strength of the reinforced columns in accordance with the distance to a critical section. The effective depth of the column may be referred to as the longitudinal length from the border between the column and the foundation. The lateral-resisting capacity for the non-seismic bare frame and the strengthened frame may be reasonably determined per the specified shear strength of the reinforced columns in accordance with the distance to a critical section. The effective depth of the column may be referred to as the longitudinal length from the border between the column and the foundation. The proposed method had an error of about 2.2% for the non-seismic details and about 4.4% for the strengthened frame based on the closed results versus the experimental results.

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References

  1. Korea Meteorological Administration. Earthquake Annual Report. Korea Meteorological Administration. c2017.
  2. Korea Ministry of the Interior and Safety. 2017 Pohang earthquake whitepaper. Korea Ministry of the Interior and Safety. c2018.
  3. Neria Y, Nandi A. Post-traumatic stress disorder following disasters: A systematic review. Psychological Medicine. 2008;38:467-480. https://doi.org/10.1017/s0033291707001353
  4. Kwon HR, Park SH. Psychological factors as predictors of posttraumatic stress and depressive symptoms among survivors of the Gyeongbuk area earthquake. The Korean Psychological Assocation. 2019;38(2):127-144. https://doi.org/10.15842/kjcp.2019.38.2.001
  5. Korea Ministry of the Interior and Safety. Establishment of master plan for Korean seismic design and retrofit. Korea Ministry of the Interior and Safety. c2018.
  6. Lee BG, Hwang DS, Choi YC, Kim YS, Lee KS. Seismic capacity evaluation of full-size two-story R/C frame strengthened with hswf external connection method by pseudo-dynamic test. Journal of the Korea Concrete Institute. 2019;31(1):89-97. https://doi.org/10.4334/jkci.2019.31.1.089
  7. Jung HC, Jung JS, Lee KS. Seismic performance evaluation of internal steel frame connection method for seismic strengthening by cycling load test and nonlinear analysis. Journal of the Korea Concrete Institute. 2019;31(1):79-88. https://doi.org/10.4334/jkci.2019.31.1.079
  8. Kim S, L ee K. Seismic perf ormance evaluation o f reinforced concrete buildings strengthened by embedded steel frame. Journal of the Earthquake Engineering of Korea. 2020;24(1):29-37. https://doi.org/10.5000/EESK.2020.24.1.029
  9. Korea Ministry of Education. Seismic design code of school facilities. Korea Ministry of Education. c2020
  10. Korea Ministry of Education. Manual of seismic performance evaluation and retrofit for school facilities. Korea Ministry of Education. c2019.
  11. Korea Ministry of Education and Korea Institute of Educational Environment. Guideline for seismic evaluation and rehabilitation of existing school buildings in Korea. Korea Ministry of Education and Korea Institute of Educational Environment. c2011. 108p.
  12. Union Corporation [Internet]. Available from: http://www.unioncement.com
  13. HILTI Corporation. Operating instruction Hilti HIT-CT 1 with HITV. HILTI Corporation. c2012.
  14. Korean Agency for Technology and Standards (KATS). Method of tensile test for metallick materials - KS B 0802. KATS. c2003.
  15. Korean Agency for Technology and Standards (KATS). Standard test method for making and curing concrete specimens - KS F 2403. KATS. c2014.
  16. Korean Agency for Technology and Standards (KATS). Standard test for compressive strength of concrete - KS F 2405. KATS. c2010.
  17. ACI Committee 374. 374.1-05: Acceptance criteria f or moment f rames based on structural testing and commentary. American Concrete Institute (ACI). Farmington Hills, MI, USA. c2006.
  18. ACI Committee 318. Building code requirements for structure concrete (ACI 318-14). American Concrete Institute (ACI). Farmington Hills, MI, USA. c2014.