DOI QR코드

DOI QR Code

Effects of spatial variability of earthquake ground motion in cable-stayed bridges

  • Ferreira, Miguel P. (Civil Engineering Department, University of Coimbra) ;
  • Negrao, Joao H. (Civil Engineering Department, University of Coimbra)
  • 투고 : 2005.07.20
  • 심사 : 2006.02.27
  • 발행 : 2006.06.20

초록

Most codes of practice state that for large in-plane structures it is necessary to account for the spatial variability of earthquake ground motion. There are essentially three effects that contribute for this variation: (i) wave passage effect, due to finite propagation velocity; (ii) incoherence effect, due to differences in superposition of waves; and (iii) the local site amplification due to spatial variation in geological conditions. This paper discusses the procedures to be undertaken in the time domain analysis of a cable-stayed bridge under spatial variability of earthquake ground motion. The artificial synthesis of correlated displacements series that simulate the earthquake load is discussed first. Next, it is described the 3D model of the International Guadiana Bridge used for running tests with seismic analysis. A comparison of the effects produced by seismic waves with different apparent propagation velocities and different geological conditions is undertaken. The results in this study show that the differences between the analysis with and without spatial variability of earthquake ground motion can be important for some displacements and internal forces, especially those influenced by symmetric modes.

키워드

참고문헌

  1. Barbat, A. and Canet, J. (1994), Estructuras Sometidas a Acciones Sismicas. $ 2^a$ edicion. CIMNE. Barcelona
  2. Boissieres, H.P. and Vanmarcke, E.H. (1995), ' Estimation of lags for a seismograph array - Wave propagation and composite correlation ', Soil Dyn. Earthq. Eng., 14(1), 5-22 https://doi.org/10.1016/0267-7261(94)00026-D
  3. Bowles, J. (1996), Foundation Analysis and Design. Fifth edition, McGraw-Hili International Editions, Singapore
  4. Clough, R. and Penzien, J. (1993), Dynamics of Structures, Second edition, McGraw-Hili, Singapore
  5. Dowrick, D. (1977), Earthquake Resistant Design, John Wiley & Sons
  6. Eurocode 2 (2004), EN 1992-1-1 Eurocode 2: Design of concrete structures. Partl-l: General rules and rules for buildings, CEN
  7. Eurocode 8 (2003), prEN 1998-2 Final PT Draft (Stage 34) Eurocode 8: Design of structures for earthquake resistance. Part2: Bridges, CEN
  8. Fernandes, J.A. and Santos, L.O. (1993), Pontes atirantadas do Guadiana e do Arade, LNEC, Lisboak
  9. Ferreira, M. and Negrao, J. (2004), ' Spatial variation of ground motion: Synthesis of correlated displacements ', Proc. of the Seventh Int. Conf. on Computational Structures Technology, Lisbon
  10. Guan, J., Hao, H. and Yong, L. (2004), ' Generation of probabilist displacement response spectra for displacement-based design ', Soil Dyn. Earthq. Eng., 24(2), 149-166 https://doi.org/10.1016/j.soildyn.2003.09.005
  11. Hao, H., Oliveira, C.S. and Penzien, J. (1989), ' Multiple-station ground motion processing and simulation based on SMART-I array data ', Nucl. Eng. Des., 121(11),1557-1564
  12. Hao, H. (1991), ' Response of multiply supported rigid plate to spatially correlated seismic excitations ', Earthq.Eng. Struct. Dyn., 20(9), 821-838 https://doi.org/10.1002/eqe.4290200903
  13. Hao, H. (1998), ' A parametric study of required seating length for bridge decks during earthquake ', Earthq.Eng. Struct. Dyn., 27(1), 91-103 https://doi.org/10.1002/(SICI)1096-9845(199801)27:1<91::AID-EQE722>3.0.CO;2-I
  14. Harichandran, R.S. and Vanmarcke, E.H. (1986), ' Stochastic variation of earthquake ground motion in space and time ', J. Eng. Mech., ASCE, 112(2), 154-174 https://doi.org/10.1061/(ASCE)0733-9399(1986)112:2(154)
  15. Harichandran, R.S. (1991),' Estimating the spatial variation of earthquake ground motion from dense array recordings ', Struct. Saf, 10, 213-233
  16. Harichandran, R.S., Hawwari, A. and Sweidan, B.N. (1996), 'Response of long-span bridges to spatially varying ground motions ', J. Struct. Eng., ASCE, 122(5),476-484 https://doi.org/10.1061/(ASCE)0733-9445(1996)122:5(476)
  17. Der Kiureghian, A. (1996), ' A coherency model for spatially varying ground motions ', Earthq. Eng. Struct. Dyn., 25(11), 99-111 https://doi.org/10.1002/(SICI)1096-9845(199601)25:1<99::AID-EQE540>3.0.CO;2-C
  18. Laouami, N. and Labbe, P. (2001),' Analytical approach for evaluation of the seismic ground motion coherency function ', Soil Dyn. Earthq. Eng., 21(8), 727-733 https://doi.org/10.1016/S0267-7261(01)00041-0
  19. Luco, J.E. and Wong, H.L. (1986), ' Response of a rigid foundation to a spatially random ground motion ', Earthq. Eng. Struct. Dyn., 14(6), 891-908 https://doi.org/10.1002/eqe.4290140606
  20. Mari, J., Glangeaud, F. and Coppens, F. (1999), Signal Processing for Geologists and Geophysicists, Editions Technip, France
  21. Nazmy, A. and Abdel-Ghaftar, A. (1992), ' Effects of ground motion spatial variability on the response of cablestayed bridges ' , Earthq. Eng. Struct. Dyn., 21( 1), 1-20 https://doi.org/10.1002/eqe.4290210101
  22. RSA (1984), Regulamento de Seguranr;a e Accoes para Estruturas de Edificios e Pontes. Imprensa Nacional Casa da Moeda. Lisboa
  23. Safak, E. (1995),' Discrete time analysis of seismic site amplification ', J. Eng. Mech., ASCE, 121(7), 801-909 https://doi.org/10.1061/(ASCE)0733-9399(1995)121:7(801)
  24. Soyluk, K. and Dumaglu, A.A. (2000), ' Comparison of asynchronous and stochastic dynamic responses of a cable-stayed bridge ', Eng. Struct., 22(5), 435-445 https://doi.org/10.1016/S0141-0296(98)00126-6
  25. Trifunac, M. (1970), ' Low frequency digitalization errors and a new method for zero baseline correction of strong-motion accelerograms ', Report No. EERL 70-07. Pasadena - California
  26. Zanardo, G, Hao, H. and Modena, C. (2002), ' Seismic response of multi-span simply supported bridges to a spatially varying earthquake ground motion ', Earthq. Eng. Struct. Dyn., 31(6), 1325-1345 https://doi.org/10.1002/eqe.166
  27. Zerva, A. (1990), ' Response of multi-span beams to spatially incoherent seismic ground motions ', Earthq. Eng.Struct. Dyn., 19(6), 819-832 https://doi.org/10.1002/eqe.4290190604

피인용 문헌

  1. Characterisation of subsurface spatial variability using a cone resistivity penetrometer vol.31, pp.7, 2011, https://doi.org/10.1016/j.soildyn.2011.03.012
  2. Monte Carlo simulation for seismic analysis of a long span suspension bridge vol.78, 2014, https://doi.org/10.1016/j.engstruct.2014.08.051
  3. Evaluation of subsurface spatial variability in site characterization based on RCPTU data vol.75, pp.1, 2016, https://doi.org/10.1007/s10064-015-0727-8
  4. 온도보상형 전기저항 프로브의 현장 적용성 평가 vol.31, pp.c4, 2006, https://doi.org/10.12652/ksce.2011.31.4c.117
  5. Influence of near-fault ground motions characteristics on elastic seismic response of asymmetric buildings vol.40, pp.4, 2011, https://doi.org/10.12989/sem.2011.40.4.489