DOI QR코드

DOI QR Code

기둥 파괴모드에 따른 학교 건물 철골 가새 보강의 효율성

The Efficiency of Steel Brace Strengthening of School Buildings according to the Failure Mode of Columns

  • 이희섭 (한울구조안전기술) ;
  • 김태완 (강원대학교 건축토목환경공학부)
  • Lee, Hee Seop (Hanwool Structural Safety Technology) ;
  • Kim, Taewan (Department of Architectural, Civil, and Environmental Engineering, Kangwon National University)
  • 투고 : 2022.10.06
  • 심사 : 2023.01.19
  • 발행 : 2023.03.01

초록

Steel brace strengthening is the most popular seismic rehabilitation method for school buildings. This is because the design can be conducted by using relatively easy nonlinear pushover analysis and standard modeling in codes. An issue with steel brace strengthening is that the reinforced building should behave elastically to satisfy performance objectives. For this, the size of steel braces should be highly increased, which results in excessive strengthening cost by force concentration on existing members and foundations due to the considerable stiffness and strength of the steel braces. The main reason may be the brittle failure mode of columns, so this study investigated the relationship between the efficiency of steel brace strengthening and column failure modes. The result showed that the efficiency is highly dependent on the shear capacity ratio of columns and structural analysis methods. School buildings reinforced by steel braces do not need to behave elastically when the shear capacity ratio is low, and pushover analysis is used, which means reducing steel material is possible.

키워드

과제정보

이 논문은 2022년도 강원대학교 대학회계의 지원을 받아 수행한 연구임.

참고문헌

  1. Ministry of Education. Seismic performance evaluation and rehabilitation manual for school buildings. c2021.
  2. Ministry of Land, Infrastructure and Transport. Korean building code-structural (KDS 41 00 00). c2019.
  3. Ministry of Education. Seismic design code for school buildings. c2020.
  4. Lee HS. Comparison of Seismic Performance of Steel Brace Reinforcement in School Buildings according to Analysis method. MS Thesis. Graduate School at Kangwon National University. c2022.
  5. MIDAS IT (2020) MIDAS GEN User's Manual, ver 890.
  6. Computers and Structures, Inc. Perform-3D, Ver. 6.0.
  7. Ministry of the Interior and Safety. A white paper on Pohang earthquake. c2017.
  8. Kim TW, Min CG. Analytical study of the effect of full and partial masonry infills on the seismic performance of school buildings. Journal of the Earthquake Engineering Society of Korea. 2013 Sep; 17(5):197-207. https://doi.org/10.5000/EESK.2013.17.5.197
  9. ASCE, Seismic evaluation and retrofit of existing buildings (ASCE/SEI 41-13). American Society of Civil Engineers. c2013.
  10. Kim J, Kim T. Seismic fragility function for existing low-rise piloti-type buildings reflecting damage from Pohang earthquake. Journal of the Earthquake Engineering Society of Korea. 2021 Nov; 25(6):251-259. https://doi.org/10.5000/EESK.2021.25.6.251
  11. Joo C, Kim T. Seismic Fragility of Low-rise Piloti Buildings Designed According to KDS 41 17 00. Journal of the Earthquake Engineering Society of Korea. 2022 Mar;26(2):49-58. https://doi.org/10.5000/EESK.2022.26.2.049
  12. PEER Ground Motion Database. Pacific Earthquake Engineering Research Center. Berkeley, California. Available from: https://ngawest2.berkeley.edu/
  13. Ministry of Land, Infrastructure and Transport. Seismic design code for buildings (KDS 41 17 00). c2019.