Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Energy Demand of Structures Depending on Ground Motion Characteristics and Structural Properties

지반 운동과 구조물 특성에 따른 구조물의 에너지 요구량

  • 최현훈 (성균관대학교 건축공학과) ;
  • 김진구 (성균관대학교 건축공학과)
  • Published : 2005.06.01
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Abstract

The energy-based seismic design method Is more rational in comparison with current seismic design code in that it can directly account for the effects of cumulative damage by earthquake and hysteretic behavior of the structure. However there are research results that don't reach a consensus depending on the ground motion characteristic and structural properties. For that reason in this study the influences of ground motion characteristics and structural properties on energy demands were evaluated using 100 earthquake ground motions recorded in different soil conditions, and the results obtained were compared with those of previous works. Results show that ductility ratios and sue conditions have significant influence on input energy. The results show that the ratio of hysteretic to input energy is considerably influenced by the ductility ratio, damping ratio, and strong motion duration, while the effect of site condition is insignificant.

에너지 설계법은 지진에 의해 누적된 손상과 구조물의 이력거동에 의한 영향을 직접적으로 고려할 수 있기 때문에 현행 내진설계 기준보다 더 합리적이다. 그러나 지반운동과 구조물 특성에 따른 에너지 응답에 대한 관련 연구자들의 합의가 아직 도출되지 않고 있다. 따라서 본 연구에서는 에너지 요구에 대한 지진하중과 구조물 특성의 영향을 다른 지반조건에서 계측된 100개의 지진기록을 이용하여 평가하고 기존 연구결과와 비교하였다. 해석 결과에 따르면 연성비와 지반조건은 입력에너지에 상당한 영향을 주는 것으로 나타났다. 입력에너지에 대한 이력에너지비는 연성비, 감쇠비와 강한 지진파의 지속시간에 많은 영향을 받았지만 지반조건에 따른 변화는 작았다.

Keywords

References

  1. SEAOC, Performance based seismic engineering of buildings, SEAOC Vision 2000 Committee, Structural Engineers Association of California, California, 1995
  2. Akbas, B., Shen, J. and Hao, H., 'Energy approach in performance-based seismic design of steel moment resisting frames for basic safety objective,' The structural design of tall buildings, Vol. 10, 2001, pp. 193-217 https://doi.org/10.1002/tal.172
  3. Leelataviwat, S., Goel, S.C. and Stojadinovic, B., 'Energy-based seismic design of structures using yield mechanism and target drift,' Journal of Structural Engineering, Vol. 128, No.8, 2002, pp. 1046-1054 https://doi.org/10.1061/(ASCE)0733-9445(2002)128:8(1046)
  4. Kim, J., Choi, H., and Chung L., 'Energy-Based Seismic Design of Structures with Buckling-Restrained Braces,' Steel and Composite Structures, Vol. 4, No.6, 2004, pp. 437-452
  5. Housner, G., 'Limit design of structures to re¬sist earthquakes,' Proceedings of the First World Conference on Earthquake Engineering, Berkeley, California, 1956
  6. Zahrah, T. and Hall, J., 'Earthquake energy absorption in SDOF structures,' Journal of Structural Engineering, Vol. 110, No. 8, 1984, pp. 1757-1772 https://doi.org/10.1061/(ASCE)0733-9445(1984)110:8(1757)
  7. Uang, C. M. and Bertero, V. V., 'Use of energy as a design criterion in earthquake-resistant design,' Report No. UCB/EERC-88/18, Earthquake Engineering Research Center, University of California at Berkeley, 1988
  8. Fajfar, P. and Vidic, T., 'Consistent inelastic design spectra: Hysteretic and input energy,' Earthquake Engineering and Structural Dynamics, Vol. 23, No.5, 1994, pp. 523-537 https://doi.org/10.1002/eqe.4290230505
  9. Rahnama, M. and Manuel, L., 'The effect of strong motion duration on seismic demands,' Proceeding of the 11th World Conference on Earthquake Engineering, Mexico, 1996
  10. Decanini, L. D. and Mollaioli, F., 'An energy-based methodology for the assessment of seismic demand,' Soil Dynamics and Earthquake Engineering, Vol. 21, No.2, 2001, pp. 113-137 https://doi.org/10.1016/S0267-7261(00)00102-0
  11. Somerville, P., Smith, H., Puriyamurthala, S. and Sun, J., 'Development of Ground Motion Time Histories for Phase 2 of the FEMA/SAC Steel Project,' SAC Joint Venture, SAC/BD 97/04, 1997
  12. Chopra, A. K., Dynamics of Structures: Theory and applications to earthquake engineering, Prentice Hall, 1995
  13. Bruneau, M. and Wang, N., 'Some aspects of energy methods for the inelastic seismic response of ductile SDOF structures,' Engineering Structures, Vol. 18, No.1, 1996, pp. 1-12 https://doi.org/10.1016/0141-0296(95)00099-X
  14. Trifunac, M.D. and Brady, A.G., 'A study on the duration of strong earthquake ground motion,' Bulletin of the Seismological Society of America, Vol. 65, No. 3, 1975, pp. 581-626
  15. Mahin, S.A. and Lin, J., 'Inelastic response spectra for single degree of freedom systems,' Department of Civil Engineering, University of California, Berkeley, 1983
  16. Akiyama, H., Earthquake-resistant limit-state design for buildings, University of Tokyo Press, Japan, 1985
  17. Nakashima, M., Saburi, K. and Tsuji, B., 'Energy input and dissipation behaviour of structures with hysteretic dampers,' Earthquake Engineering and Structural Dynamics, Vol. 25, No. 5, 1996, pp. 483-496 https://doi.org/10.1002/(SICI)1096-9845(199605)25:5<483::AID-EQE564>3.0.CO;2-K
  18. Cruz, M.F. and Lopez, O.A., 'Plastic energy dissipated during an earthquake as a function of structural properties and ground motion characteristics,' Engineering Structures, Vol. 22, No.7, 2000, pp. 784-792 https://doi.org/10.1016/S0141-0296(98)00139-4
  19. Khashaee, P., Mohraz, B., Sadek, F., Lew, H.S. and Gross, J.L., 'Distribution of earthquake input energy in structures,' Report No. NISTIR 6903, National Institute of Standards and Technology, Washington, 2003
  20. Manfredi, G., 'Evaluation of seismic energy demand,' Earthquake Engineering and Structural Dynamics, Vol. 30, No. 4, 2001, pp. 485-499 https://doi.org/10.1002/eqe.17