DOI QR코드

DOI QR Code

Extraction of bridge aeroelastic parameters by one reference-based stochastic subspace technique

  • Xu, F.Y. (School of Civil Engineering, Dalian University of Technology) ;
  • Chen, A.R. (Department of Bridge Engineering, Tongji University) ;
  • Wang, D.L. (Department of Bridge Engineering, Tongji University) ;
  • Ma, R.J. (Department of Bridge Engineering, Tongji University)
  • 투고 : 2010.07.08
  • 심사 : 2011.03.09
  • 발행 : 2011.09.25

초록

Without output covariance estimation, one reference-based Stochastic Subspace Technique (SST) for extracting modal parameters and flutter derivatives of bridge deck is developed and programmed. Compared with the covariance-driven SST and the oscillation signals incurred by oncoming or signature turbulence that adopted by previous investigators, the newly-presented identification scheme is less time-consuming in computation and a more desired accuracy should be contributed to high-quality free oscillated signals excited by specific initial displacement. The reliability and identification precision of this technique are confirmed by a numerical example. For the 3-DOF sectional models of Sutong Bridge deck (streamlined) and Suramadu Bridge deck (bluff) in wind tunnel tests, with different wind velocities, the lateral bending, vertical bending, torsional frequencies and damping ratios as well as 18 flutter derivatives are extracted by using SST. The flutter derivatives of two kinds of typical decks are compared with the pseudo-steady theoretical values, and the performance of $H_1{^*}$, $H_3{^*}$, $A_1{^*}$, $A_3{^*}$ is very stable and well-matched with each other, respectively. The lateral direct flutter derivatives $P_5{^*}$, $P_6{^*}$ are comparatively more accurate than other relevant lateral components. Experimental procedure seems to be more critical than identification technique for refining the estimation precision.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Education of China

참고문헌

  1. Bartoli, G., Contri, S., Mannini, C. and Righi, M. (2009),"Toward an improvement in the identification of bridge deck flutter derivatives", J. Eng. Mech - ASCE, 135(8), 771-785. https://doi.org/10.1061/(ASCE)0733-9399(2009)135:8(771)
  2. Chen, A.R., He, X.F. and Xiang, H.F. (2002), "Identification of 18 flutter derivatives of bridge decks", J. Wind Eng. Ind. Aerod., 90(12-15), 2007-2022. https://doi.org/10.1016/S0167-6105(02)00317-3
  3. Chen, A.R., Xu, F.Y. and Ma, R.J.(2006), "Identification of flutter derivatives of bridge decks using stochastic search technique", Wind Struct., 9(6), 441-455. https://doi.org/10.12989/was.2006.9.6.441
  4. Chen, X.Z. and Kareem, A. (2004), "Efficacy of the implied approximation in the identification of flutter derivatives", J.Struct. Eng - ASCE, 130(12), 2070-2074. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:12(2070)
  5. Chen, X.Z. and Kareem, A. (2008), "Identification of critical structural modes and flutter derivatives for predicting coupled bridge flutter", J. Wind Eng. Ind. Aerod., 96(10-11), 1856-1870. https://doi.org/10.1016/j.jweia.2008.02.025
  6. Chen, X.Z., Matsumoto, M. and Kareem, A. (2000), "Aerodynamic coupling effects on flutter and buffecting of bridges", J. Eng. Mech - ASCE, 126(1), 17-26. https://doi.org/10.1061/(ASCE)0733-9399(2000)126:1(17)
  7. Chen, Z.Q., Han, Y., Luo, Y.Z. and Hua, X. (2010), "Identification of aerodynamic parameters for eccentric bridge section model", J. Wind Eng. Ind. Aerod., 98(4-5), 202-214. https://doi.org/10.1016/j.jweia.2009.10.016
  8. Chowdhury, A.G. and Sarkar, P.P. (2003), "A new technique for identification of eighteen flutter derivatives using a three-degree-of-freedom sectional model", Eng. Struct., 25(14), 1763-1772. https://doi.org/10.1016/j.engstruct.2003.07.002
  9. Chowdhury, A.G. and Sarkar, P.P. (2004a), "Identification of eighteen flutter derivatives of an airfoil and a bridge deck", Wind Struct., 7(3), 187-202. https://doi.org/10.12989/was.2004.7.3.187
  10. Gu, M. and Qin, X.R.(2004), "Direct identification of flutter derivatives and aerodynamic admittance of bridge decks from structural random response", Eng. Struct., 26(14), 2161-2172. https://doi.org/10.1016/j.engstruct.2004.07.015
  11. Gu, M. and Xu S.Z. (2008), "Effect of rain on Flutter derivatives of bridge decks", Wind Struct., 11(3), 209-220. https://doi.org/10.12989/was.2008.11.3.209
  12. Gu, M., Zhang, R.X. and Xiang, H.F. (2000), "Identification of flutter derivatives of bridge decks", J. Wind Eng. Ind. Aerod., 84(2), 151-162. https://doi.org/10.1016/S0167-6105(99)00051-3
  13. Li, Y.L., Liao, H.L. and Qiang, S.Z. (2003), "Weighting ensemble least-square method for flutter derivatives of bridge decks", J. Wind Eng. Ind. Aerod., 91(6), 713-721. https://doi.org/10.1016/S0167-6105(03)00002-3
  14. Ma, R.J. and Chen, A.R. (2007), "Determination of flutter derivatives by a taut strip model", J. Wind Eng. Ind. Aerod., 95(9-11),1400-1414. https://doi.org/10.1016/j.jweia.2007.02.018
  15. Mishra, S.S., Krishen, K. and Prem, S. (2006), "Identification of 18 flutter derivatives by covariance driven stochastic subspace method", Wind Struct., 9(2),159-178. https://doi.org/10.12989/was.2006.9.2.159
  16. Peeters, B. and Roeck, G.D. (1999), "Reference-based stochastic subspace identification for output-only modal analysis", Mech. Syst. Signal Pr.,13(6), 855-878. https://doi.org/10.1006/mssp.1999.1249
  17. Qin, X.R. and Gu, M. (2004), "Determination of flutter derivatives by covariance-driven stochastic subspace identification technique", Wind Struct., 7(3), 173-186. https://doi.org/10.12989/was.2004.7.3.173
  18. Qin, X.R., Kwok, K.C.S., Fok, C.H., Hitchcock, P.A. and Xu, Y.L. (2007), "Wind-induced self-excited vibrations of a twin-deck bridge and the effects of gap-width", Wind Struct., 10(5), 463-479. https://doi.org/10.12989/was.2007.10.5.463
  19. Quan, Y., Gu, M. and Tamura, Y. (2005), "Experimental evaluation of aerodynamic damping of square super high-rise buildings", Wind Struct., 8(5), 309-324. https://doi.org/10.12989/was.2005.8.5.309
  20. Sarkar, P.P., Gan Chowdhury, A. and Gardner, T.B. (2004b), "A novel elastic suspension system for wind tunnel section model studies", J. Wind Eng. Ind. Aerod., 92(1), 23-40. https://doi.org/10.1016/j.jweia.2003.09.036
  21. Sato, H., Hirahara, N., Fumoto, K., Hirano, S. and Kusuhara, S. (2002), "Full aeroelastic model test of a super long-span bridge with slotted box girder", J. Wind Eng. Ind. Aerod., 90(12-15), 2023-2032. https://doi.org/10.1016/S0167-6105(02)00318-5
  22. Scanlan, R.H. (1993), ''Problematic in formulation of wind-force models for bridge decks'', J. Struct. Eng - ASCE, 119(7), 1433-1446.
  23. Singh, L., Jones, N.P., Scanlan, R.H. and Lorendeaux, O. (1996), "Identification of lateral flutter derivatives of bridge decks", J. Wind Eng. Ind. Aerod., 60(1-3), 81-89. https://doi.org/10.1016/0167-6105(96)00025-6

피인용 문헌

  1. A predictive critical flutter wind speed modeling for long-span bridges vol.23, pp.9, 2020, https://doi.org/10.1177/1369433219900977