Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Blockage effects on aerodynamics and flutter performance of a streamlined box girder

  • Li, Yongle (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Guo, Junjie (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Chen, Xingyu (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Tang, Haojun (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Zhang, Jingyu (Department of Bridge Engineering, Southwest Jiaotong University)
  • Received : 2019.03.12
  • Accepted : 2019.06.09
  • Published : 2020.01.25
⟨ Previous Next ⟩

Abstract

Wind tunnel test is one of the most important means to study the flutter performance of bridges, but there are blockage effects in flutter test due to the size limitation of the wind tunnel. On the other hand, the size of computational domain can be defined by users in the numerical simulation. This paper presents a study on blockage effects of a simplified box girder by computation fluid dynamics (CFD) simulation, the blockage effects on the aerodynamic characteristics and flutter performance of a long-span suspension bridge are studied. The results show that the aerodynamic coefficients and the absolute value of mean pressure coefficient increase with the increase of the blockage ratio. And the aerodynamic coefficients can be corrected by the mean wind speed in the plane of leading edge of model. At each angle of attack, the critical flutter wind speed decreases as the blockage ratio increases, but the difference is that bending-torsion coupled flutter and torsional flutter occur at lower and larger angles of attack respectively. Finally, the correction formula of critical wind speed at 0° angle of attack is given, which can provide reference for wind resistance design of streamlined box girders in practical engineering.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China, Central Universities

References

  1. Cheng, H.M. (2003), Wind Tunnel Experiment Interference and Correction. National Defense Industry Press, Beijing, China.
  2. Ge, Y.J., Zou, X.J. and Yang, Y.X. (2009), "Aerodynamic stabilization of central stabilizers for box girder suspension bridges", Wind Struct., Int. J., 12(4), 285-298. https://doi.org/10.12989/was.2009.12.4.285
  3. Ge, Y.J. and Xiang, H.F. (2008), "Recent development of bridge aerodynamics in China", J Wind Eng. Ind. Aerodyn., 96(6), 736-768. https://doi.org/10.1016/j.jweia.2007.06.045.
  4. Gu, M. and Huang, J. (2016), "Research Progress of Wind Tunnel Blockage Effects on Building Models", J. Tongji Univ. Nat. Sci., 44(1), 1-10.
  5. He, X.H., Li, H., Wang, H.F., Fang, D.X. and Liu, M.T. (2017), "Effects of geometrical parameters on the aerodynamic characteristics of a streamlined flat box girder", J. Wind Eng. Ind. Aerodyn., 170, 56-67. https://doi.org/10.1016/j.jweia.2017.08.009.
  6. Huang, J. and Gu, M. (2015), "Experimental investigation of blockage effects on mean pressure of rectangular tall buildings in the wind tunnel", Acta Aerodyn. Sin., 33(3).
  7. Huang, L., Liao, H.L., Wang, B. and Li, Y.L. (2009), "Numerical simulation for aerodynamic derivatives of bridge deck", Simul. Model. Pract. Theory., 17(4), 719-729. https://doi.org/10.1016/j.simpat.2008.12.004
  8. Hunt, A. (1982), "Wind-tunnel measurements of surface pressures on cubic building models at several scales", J. Wind Eng. Ind. Aerodyn., 10(2), 137-163. https://doi.org/10.1016/0167-6105(82)90061-7.
  9. Ito, Y., Shirato, H. and Matsumoto, M. (2014), "Coherence characteristics of fluctuating lift forces for rectangular shape with various fairing decks", J. Wind Eng. Ind. Aerodyn., 135, 34-45. https://doi.org/10.1016/j.jweia.2014.10.003
  10. Kubo, Y., Miyazaki, M. and Kato, K. (1989), "Effects of end plates and blockage of structural members on drag forces", J. Wind Eng. Ind. Aerodyn., 32(3), 329-342. https://doi.org/10.1016/0167-6105(89)90006-8.
  11. Larsen, A. (2000), "Aerodynamics of the Tacoma Narrows Bridge - 60 Years Later", Struct. Eng. Int., 10(4), 243-248. https://doi.org/10.2749/101686600780481356
  12. Larsen, A. (1993), "Aerodynamic aspects of the final design of the 1624 m suspension bridge across the Great Belt", J. Wind Eng. Ind. Aerodyn., 48(2), 261-285. https://doi.org/10.1016/0167-6105(93)90141-A
  13. Larsen, A., Savage, M., Lafreniere, A., Hui, M.C.H. and Larsen, S.V. (2008), "Investigation of vortex response of a twin box bridge section at high and low Reynolds numbers", J. Wind Eng. Ind. Aerodyn., 96(6), 934-944. https://doi.org/10.1016/j.jweia.2007.06.020.
  14. Larsen, A. and Wall, A. (2012), "Shaping of bridge box girders to avoid vortex shedding response", J. Wind Eng. Ind. Aerodyn., 104-106, 159-165. https://doi.org/10.1016/j.jweia.2012.04.018.
  15. Li, Y.L., Chen, X.Y., Wang, B. and Zhu, L.D. (2018), "Blockageeffects and amplitude conversion of vortex-induced-vibration for flat-box girder", Eng. Mech., 35(11), 45-78.
  16. Ma, C.M., Duan, Q.S. and Liao, H.L. (2018), "Experimental Investigation on Aerodynamic Behavior of a Long Span Cablestayed Bridge Under Construction", KSCE J. Civ. Eng., 22(7), 2492-2501. https://doi.org/10.1007/s12205-017-0402-7
  17. Miranda, S., Patruno, L., Ricci, M. and Ubertini, F. (2015), "Numerical study of a twin box bridge deck with increasing gap ratio by using RANS and LES approaches", Eng. Struct., 99, 546-558. https://doi.org/10.1016/j.engstruct.2015.05.017.
  18. Scanlan, R.H. and Tomko, J.J. (1971), "Airfoil and Bridge Deck Flutter Derivatives", J. Eng. Mech. Div., 97(6), 1717-1737. https://doi.org/10.1061/JMCEA3.0001526
  19. Simiu, E. and Scanlan, R.H. (1996), Wind effects on structures: fundamentals and applications to design, (3rd Edition), John Wiley, New York, NY, USA.
  20. Sukamta, Nagao, F., Noda, M. and Muneta, K. (2008), "Aerodynamic stabilizing mechanism of a cable stayed bridge with two edge box girder", The Proceedings of 6th International Colloquium on: Bluff Bodies Aerodynamics & Applications, Milano, Italy, July.
  21. Takeda, K. and Kato, M. (1992), "Wind tunnel blockage effects on drag coefficient and wind-induced vibration", J. Wind Eng. Ind. Aerodyn., 42(1), 897-908. https://doi.org/10.1016/0167-6105(92)90096-S.
  22. Tang, H.J., Li, Y.L. and Shum, K. (2018), "Flutter performance and aerodynamic mechanism of plate with central stabilizer at large angles of attack", Adv. Struct. Eng., 21(3), 335-346. https://doi.org/10.1177/1369433217717120.
  23. Theodorsen, T. (1935), General theory of aerodynamic instability and the mechanism of flutter, National Advisory Committee for Aeronautics, Washington, DC, USA.
  24. Walther, J.H. (1994), "Discrete Vortex Method for Two-dimensional Flow past Bodies of Arbitrary Shape Undergoing Prescribed Rotary and Translational Motion", Ph.D. Dissertation, Technical University of Denmark, Copenhagen.
  25. Zhou, Z.Y., Yang, T., Ding, Q.S. and Ge, Y.J. (2015), "Mechanism on suppression in vortex-induced vibration of bridge deck with long projecting slab with countermeasures", Wind Struct., Int. J., 20(5), 643-660. https://doi.org/10.12989/was.2015.20.5.643.
  26. Zhu, L.D., Meng, X.L. and Guo, Z.S. (2013), "Nonlinear mathematical model of vortex-induced vertical force on a flat closed-box bridge deck", J. Wind Eng. Ind. Aerodyn., 122, 69-82. https://doi.org/10.1016/j.jweia.2013.07.008.
  27. Zhu, Z.W. and Chen, Z.Q. (2004), "Numerical simulations for aerodynamic derivatives and critical flutter velocity of bridge deck", China J. Highw. Transp., 17(3), 41-45. https://doi.org/10.3321/j.issn:1001-7372.2004.03.009