Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
권호 표지
DOI QR코드

DOI QR Code

Overstrength Factors of Buckling Restrained Braced Frames

좌굴방지가새가 설치된 철골건물의 초과강도계수

  • Published : 2004.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study the overstrength factors of medium to low-rise bucking restrained braced frames (BRBF) were evaluated. Various design variables, such as number of stories, span length, yield strength of the brace, level of earthquake load, and the response modification factors. The overstrength factors were obtained using the nonlinear static analysis following the procedure proposed by ATC-19. According to the analysis results, the overstrength factors obtained from this study were generally larger than those proposed in 'AISC/SEAOC Recommended Provisions for BRBF'.

본 논문에서는 좌굴방지 가새 (BRBF)가 설치된 중저층 철골조 구조물의 초과강도계수를 평가하였다. 해석 모델의 설계변수로는 건물의 층 수, 경간의 길이, 가새의 항복강도, 지진하중의 크기, 반응수정계수 등 다양하게 설정하였다. 초과강도계수는 ATC-19에서 제시하고 있는 방법에 따라 정적 비탄성해석을 이용하여 산정하였다. 해석결과에 따르면 본 연구에서 구한 BRBF의 초과강도계수는 AISC/SEAOC에서 BRBF에 관하여 제시한 초과강도계수 값보다 전체적으로 크게 나타났다.

Keywords

References

  1. AlSC/SEAOC, 'Reccomended Provision for BRBF,' AISC/SEAOC, 2001
  2. ICC, International Building Code, International Code Council, 2000
  3. Osteraas, J. D., 'Strength and ductility considerations in seismic design,' PHD Dissertation Stanford University, Stanford, California, 1990
  4. Uang, C. M., 'Establishing R(or R,) and C factors for building seismic provisions,' Journal of Structural Engineering, Vol.119, No.1, 1991, pp. 19-28
  5. Vayas, I. and Spiliopoulosl A., 'Ductility and over-strength of moment frames,' SDSS, Stability and Ductility or Steel Structures, 1999, pp. 439-446
  6. Balendra, T. and Huang, X., 'Overstrength and ductility factors for steel frames designed according to BS 5950,' Journal of Structural Engineering, Vol. 129, No.8, 2003, pp. 1019-1035 https://doi.org/10.1061/(ASCE)0733-9445(2003)129:8(1019)
  7. ATC, 'Structural response modification factors,' ATC-19, Applied Technology Council, Redwood City, California, 1995, pp. 5-32
  8. Tsai, K.C., Weng Y. T., Lin M. L., Chen C H., Lai J. W. and Hsiao P. C, 'Pseudo dynamic tests of a full-scale CFT/BRB composite frame: displacement based seismic design and response evaluations,' The 13th World Conference on Earthquake Engineering. Vancouver, B.C., Canada, 2004
  9. AISC, Seismic Provisions for Structural Steel Buildings, AISC, Chicago, IL, 2002
  10. Black, C., Makris, N. and Aiken, I., 'Component testing, stability analysis and characterization of buckling restrained unbonded braces,' Report No.PEER-2002/08, Pacific Earthquake Engineering Research Center, University of California at Berkeley, 2002
  11. Merritt, S., Uang, C. M., and Benzoni G, 'Subassemblage testing of corebrace buckling-restrained braces,' Report No.TR-2003/01, Department of Structural Engineering University if California, San Diego La Jolla, California 92093-0085,2003
  12. Prakash, V., Powell, G. H., and Campbell, S., 'DRAIN-2DX, Static and Dynamic Analysis of Plane Structure,; NISEE, Earthquake Engineering Research Center, University of California, Berkeley, 1993
  13. BSSC, Prestandard and Commentary for The Seismic Rehabilitation of Building, FEMA-356, Federal Emergency Management Agency, Washington, DC, 2000
  14. Black, C., Makris, N., and Aiken, I., 'Component testing, stability analysis and characterization of buckling restrained braces,' Final Report to Nippon Steel Corporation, Japan, 2002