KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Nonlinear Static Analysis for Seismic Performance Evaluation of Multi-Span Bridges Considering Effect Load Distributions

횡하중 분포의 영향을 고려한 다경간 교량의 내진성능 평가를 위한 비탄성 정적해석

Song, Jong-Keol;Nam, Wang-Hyun;Chung, Yeong-Hwa
송종걸;남왕현;정영화

  • Published : 2005.11.30

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Abstract

Performance-based approaches as an alternative method of the existing force-based approach have gradually become recognized tools for the seismic design and evaluation. The nonlinear static procedure (NSP) based on pushover analysis has been developed as a practical engineering tool to estimate the inelastic response quantities in the performance-based approaches. To estimate an inelastic force-displacement relationship as capacity curve by the NSP, the monotonic increments of equivalent seismic load with constant lateral load distribution are generally used. One of important variables related to an accuracy of the NSP is the lateral load distribution. The pushover analyses for three multi-span bridge structures were performed using the six types of lateral load distributions. To evaluate an accuracy of the NSP according to the applied lateral load distributions, the maximum displacements estimated by the capacity spectrum method are compared to those by the inelastic time history analysis.

기존의 하중-기반 방법을 대체할 방법으로서 성능-기반 방법이 내진설계 및 내진성능평가의 기법으로서 널리 인식되어 오고 있는 실정이다. 비탄성 정적해석 기법은 성능-기반 방법에서 사용되는 비탄성 응답량을 산정하기 위한 실제적인 도구로서 개발되어 오고 있다. 비탄성 정적해석에서 역량곡선인 비탄성 힘-변위 관계를 산정하기 위해서는 일정한 하중분포를 가진 등가지진하중의 점진적인 단조증가하중이 일반적으로 사용된다. 비탄성 정적해석의 정확성과 관련된 중요한 변수중의 하나가 횡하중 분포이다. 3개의 대칭 및 비대칭 예제교량에 대한 비탄성 정적해석을 여섯 개의 하중분포에 대해서 수행하였다. 횡하중 분포에 따른 비탄성 정적해석법의 정확성을 평가하기 위하여 역량스펙트럼 방법에 의한 최대변위응답을 비선형 시간이력해석에 의한 결과와 비교하였다.

Keywords

References

  1. 건설교통부(2005)도로교설계기준
  2. 송종걸(2004)역량스펙트럼 방법을 이용한 다자유도 교량의 비탄성 지진응답 평가, 대한토목학회논문집, 대한토목학회, 제24권, 제3A호, pp.541-550
  3. Applied Technology Council (1996) Seismic Evaluation and Retrofit of concrete Buildings, ATC-40 Report, Redwood city, California
  4. Applied Technology Council (1997) NEHRP guidelines for the seismic rehabilitation of building (FEMA 273), and NEHRP commentary on the guidelines for the seismic rehabilitation of buildings (FEMA 274), ATC 33, Redwood city, California
  5. Applied Technology Council (2004) Improvement of nonlinear static seismic analysis procedures (FEMA 440), ATC-55 Project, Redwood city, California
  6. ASCE (2000) Prestandard and commentary for the seismic rehabilitation of buildings (FEMA 356), Reston, Virginia
  7. Bracci, J.M., Kunnath, S.K. and Reinhorn, A.M. (1997) Seismic performance and retrofit evaluation of reinforced concrete structures, Structural Engineering, ASCE, Vol. 123, No.1, pp. 3-10
  8. Calvi, G.M. (1995) Displacement-based seismic design of multidegree-of-freedom bridge structures, Earthquake Engineering and Structural Dynamics, Vol. 24, No. 12, pp. 1247-1266 https://doi.org/10.1002/eqe.4290240906
  9. Chopra, A.K. and Goel, R.K. (2000) Evaluation of NSP to estimate seismic deformation: SDF systems, Structural Engineering, ASCE, Vol. 126, No.4, pp. 482-490 https://doi.org/10.1061/(ASCE)0733-9445(2000)126:4(482)
  10. Chopra, A.K. and Goel, R.K. (2002) Modal pushover analysis procedure for estimating seismic demands for buildings, Earthquake Engineering and Structural Dynamics, Vol. 31, No.3, pp.561-582 https://doi.org/10.1002/eqe.144
  11. Chopra, A.K., Goel, R.K., and Chintanapakdee, C. (2004) Evaluation of a modified MPA procedure assuming higher modes as elastic to estimate seismic demands, Earthquake Spectra, Vol. 20, No.3, pp. 757-778 https://doi.org/10.1193/1.1775237
  12. Chopra, A.K. and Goel, R.K. (2004) A modal pushover analysis procedure to estimate seismic demands for unsymmetric-plan buildings, Earthquake Engineering and Structural Dynamics, Vol. 33, No.9, pp. 903-927 https://doi.org/10.1002/eqe.380
  13. Gasparini, D. and Vanrnarcke, E.H. (1976) 'SIMQKE: A Program for Artificial Motion Generation,' MIT
  14. Gupta B. and Knnath S.K. (2000) Adaptive spectra-based pushover procedure for seismic evaluation of structures, Earthquake Spectra, Vol. 16, No.2, pp. 367-392 https://doi.org/10.1193/1.1586117
  15. Kowalsky, M.J. (2002) A displacement-based approach for the seismic design of continuous concrete bridges, Earthquake Engineering and Structural Dynamics, Vol. 31, No.5, pp. 719-747 https://doi.org/10.1002/eqe.150
  16. Krawinkler, H. and Seneviranta, G.D.P.K. (1998) Pros and cons ofa pushover analysis of seismic performance evaluation, Engineering Structures, Vol. 20, No.4, pp. 452-464 https://doi.org/10.1016/S0141-0296(97)00092-8
  17. Lee, D.G., Song, J.K. and Yun, C.B. (1997) Estimation of systemlevel ductility demands for multi-story structures, Engineering Structures, Vol. 19, No. 12, pp. 1025-1035 https://doi.org/10.1016/S0141-0296(97)00010-2
  18. Miranda, E. and Ruiz-Garcia, J. (2002) Evaluation of approximate methods to estimate maximum inelastic displacement demands, Earthquake Engineering and Structural Dynamics, Vol. 31, No. 4, pp. 539-560 https://doi.org/10.1002/eqe.143
  19. Miranda, E. and Bertero, V.V. (1994) Evaluation of strength reduction factors for earthquake resistant design, Earthquake Spectra, Vol. 10, No.3, pp. 357-379 https://doi.org/10.1193/1.1585778
  20. Moehle, J.P. (1992) Displacement-based design of RIC structures subjected to earthquake, Earthquake Spectra, Vol. 8, No.3, pp. 403-427 https://doi.org/10.1193/1.1585688
  21. Priestley, M.J.N., Seible, F, and Calvi, G.M. (1996) Seismic design and retrofit of bridges, John Wiley & Sons, Inc.
  22. Reinhorn, A.M., Simeonov, V., Mylonakis, G. and Reichman (1998) IDARC-BRIDGE: a computational platform for seismic damage assessment of bridge structures, Technical Report MCEER-98-0011, State University of New York at Buffalo
  23. Sasaki, K.K., Freeman, S.A., and Paret, T.F., (1998) Muti-mode pushover procedure (MMP)- a method to identify the effects of higher modes in a pushover analysis, Proc. 6th Us. National Canf.of Earthquake Engineering, Seattle, Washington, pp. 1-12
  24. Song, J.K. and Pincheira, J.A. (2000) Spectral displacement demands of stiffuess and strength degrading systems, Earthquake Spectra, Vol. 16, No.4, pp. 817-851 https://doi.org/10.1193/1.1586141
  25. UCFyber-Cross section analysis software for structural engineers (2000) $Zevent^{TM}$
  26. Villaverde R. (1996) Simplified response spectrum seismic analysis of non-linear structures, Engineering Mechanics, ASCE, Vol. 122, No.3, pp. 282-285 https://doi.org/10.1061/(ASCE)0733-9399(1996)122:3(282)