Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Study of central buckle effects on flutter of long-span suspension bridges

  • Han, Yan (School of Civil Engineering, Changsha University of Science & Technology) ;
  • Li, Kai (School of Civil Engineering, Changsha University of Science & Technology) ;
  • Cai, C.S. (Department of Civil and Environmental Engineering, Louisiana State University)
  • Received : 2020.02.18
  • Accepted : 2020.11.02
  • Published : 2020.11.25
⟨ Previous Next ⟩

Abstract

To investigate the effects of central buckles on the dynamic behavior and flutter stability of long-span suspension bridges, four different connection options between the main cable and the girder near the mid-span position of the Aizhai Bridge were studied. Based on the flutter derivatives obtained from wind tunnel tests, formulations of self-excited forces in the time domain were obtained using a nonlinear least square fitting method and a time-domain flutter analysis was realized. Subsequently, the influences of the central buckles on the critical flutter velocity, flutter frequency, and three-dimensional flutter states of the bridge were investigated. The results show that the central buckles can significantly increase the frequency of the longitudinal floating mode of the bridge and have greater influence on the frequencies of the asymmetric lateral bending mode and asymmetric torsion mode than on that of the symmetric ones. As such, the central buckles have small impact on the critical flutter velocity due to that the flutter mode of the Aizhai Bridge was essentially the symmetric torsion mode coupled with the symmetric vertical mode. However, the central buckles have certain impact on the flutter mode and the three-dimensional flutter states of the bridge. In addition, it is found that the phenomenon of complex beat vibrations (called intermittent flutter phenomenon) appeared in the flutter state of the bridge when the structural damping is 0 or very low.

Keywords

Acknowledgement

The authors would like to gratefully acknowledge the support from the National Natural Science Fund of China (No. 51678079; 51778073; 51822803;51978087), Natural Science Fund of Hunan for Distinguished Young Scholars (No. 2018JJ1027), Outstanding Youth Fund project from the Hunan Provincial Department of Education (No. 16B011) and the Research and Innovation Project for Graduate Students in Hunan Province (No. CX20190639).

References

  1. Briseghella, L., Franchetti, P. and Secchi, S. (2002), "Time domain flutter analysis of the Great Belt East Bridge", Wind Struct., 5(6), 479-492. https://doi.org/10.12989/was.2002.5.6.479.
  2. Chen, X., Matsumoto, M. and Kareem, A. (2000), "Time domain flutter and buffeting response analysis of bridges", J. Eng. Mech., 126(1), 7-16. https://doi.org/10.1061/(ASCE)0733-9399(2000)126:1(7).
  3. Chen, X., Kareem, A. and Matsumoto, M. (2001), "Multimode coupled flutter and buffeting analysis of long span bridges", J. Wind Eng. Ind. Aerod., 89(7), 649-664. https://doi.org/10.1016/S0167-6105(01)00064-2.
  4. Caracoglia, L. and Jones, N.P. (2013), "Time domain vs. frequency domain characterization of aeroelastic forces for bridge deck sections", J. Wind Eng. Ind. Aerod., 91(3), 371-402. https://doi.org/10.1016/S0167-6105(02)00399-9.
  5. Caracoglia, L. (2018), "Modeling the coupled electro-mechanical response of a torsional-flutter-based wind harvester with a focus on energy efficiency examination", J. Wind Eng. Ind. Aerod., 174, 437-450. https://doi.org/10.1016/ j.jweia.2017.10.017.
  6. Guo, W., Li, J. and Xiang, N. (2018), "Seismic performance of the buckling-restrained brace central buckle for long-span suspension bridges", J. Earthq. Tsunami, 12(5), 1850015. https://doi.org/10.1142/ S179343111850015X.
  7. Gao, G., Zhu, L., Wang, F., Bai, H. and Hao, J. (2020a), "Experimental investigation on the nonlinear coupled flutter motion of a typical flat closed-box bridge deck", Sensors, 20(2), 568. https://doi.org/10.3390/s20020568.
  8. Gao, G., Zhu, L., Li, J., Han, W. and Yao, B. (2020b), "A novel two-degree-of-freedom model of nonlinear self-excited force for coupled flutter instability of bridge decks", J. Wind Eng. Ind. Aerod., 205, 104303. https://doi.org/10.1016/j.jweia.2020.104313.
  9. Gao, G., Zhu, L., Li, J. and Han, W. (2020c), "Application of a new empirical model of nonlinear self-excited force to torsional vortex-induced vibration and nonlinear flutter of bluff bridge sections", J. Sound Vib., 480, 115406. https://doi.org/10.1016/j.jsv.2020.115406.
  10. Han, Y., Liu, S., Cai, C.S. and Li, C. (2015), "Flutter stability of a long-span suspension bridge during erection", Wind Struct., 21(1), 41-61. https://doi.org/10.12989/was.2015.21.1.041.
  11. Hu, T., Hua, X.G., Wen, Q. and Chen, Z.Q. (2016), "Influence of central buckles on the modal characteristics of long-span suspension bridge", J. Highway Transp. Res. Dev., 10(1), 72-77. https://doi.org/10.1061/jhtrcq.0000488.
  12. Hua, X.G., Chen, Z.Q., Ni, Y. Q. and Ko, J.M. (2007), "Flutter analysis of long-span bridges using ANSYS", Wind and Struct., 10(1), 61-82. https://doi.org/10.12989/was.2007.10.1.061.
  13. Hu, Peng, Xu G., Han Y., Cai, C.S. and Cheng, W. (2020), "Effects of inhomogeneous wind fields on the aerostatic stability of a long-span cable-stayed bridge located in the mountain-gorge terrain", J. Aeros. Eng., 33(3). https://doi.org/10.1061/(ASCE)AS.1943-5525.0001117.
  14. Jain, A., Jones, N.P. and Scanlan, R.H. (1996), "Coupled flutter and buffeting analysis of long-span bridges", J. Struct. Eng., 122(7), 716-725. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:7(716).
  15. Liu, S., Cai, C.S., Han, Y. and Li, C. (2018), "Reliability analysis on flutter of the long-span Aizhai bridge", Wind Struct., 27(3), 175-186. https://doi.org/10.12989/was.2018.27.3.175.
  16. Liu, S., Cai, C.S. and Han, Y. (2020) "Time-domain simulations of turbulence effects on the aerodynamic flutter of long-span bridges", Advan. Bridge Eng., ABEN 1, 7. https://doi.org/10.1186/s43251-020-00007-6.
  17. Liu, Z., Guo, T., Huang, L. and Pan, Z. (2017), "Fatigue life evaluation on short suspenders of long-span suspension bridge with central clamps", J. Bridge Eng., 22(10), 04017074.1-04017074.11. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001097.
  18. Lin, Y.K. and Yang, J.N. (1983), "Multimode bridge response to wind excitations", J. Eng. Mech., 109(2), 586-603. https://doi.org/10.1061/(ASCE)0733-9399(1983)109:2(586).
  19. Qin, F.J., Di, J., Dai, J. and Guang, L.L. (2014), "Influence of central buckle on dynamic behavior of long-span suspension bridge with deck-truss composite stiffening girder", Advan. Mater. Res., 838. 1096-1101. https://doi.org/10.4028/www.scientific.net/AMR.838-841.1096.
  20. Scanlan, R.H. (1978), "The action of flexible bridges under wind, I: Flutter theory", J. Sound Vib., 60(2), 187-199. https://doi.org/10.1016/S0022-460X(78)80028-5.
  21. Tang, Y., Hua, X.G., Chen, Z.Q. and Zhou, Y. (2019), "Experimental investigation of flutter characteristics of shallow Π section at post-critical regime", J. Fluids Struct., 88, 275-291. https://doi.org/10.1016/ j.jfluidstructs.2019.05.010.
  22. Wang, H., Li, A.Q., Guo, T. and Ma, S. (2009), "Accurate stress analysis on rigid central buckle of long-span suspension bridges based on submodel method", Sci. China Series E: Technol. Sci., 52(4), 1019-1026. https://doi.org/10.1007/s11431-009-0070-z.
  23. Wang, H., Li, A.Q., Zhao, G. and Li, J. (2010), "Non-linear buffeting response analysis of long-span suspension bridges with central buckle", Earthq. Eng. Eng. Vib., 9(2), 259-270. https://doi.org/ 10.1007/s11803-010-0011-7.
  24. Wang, H., Tao, T., Zhou, R., Hua, X.G. and Kareem, A. (2014), "Parameter sensitivity study on flutter stability of a long-span triple-tower suspension bridge", J. Wind Eng. Ind. Aerod., 128, 12-21. https://doi.org/10.1016/j.jweia.2014.03.004.
  25. Wang, D., Chen, C. and Liu, Y. (2013), "Central buckle influence research on dynamical characteristics of suspension bridge", Appl. Mech. Mater., 405-408, 1489-1493. https://doi.org/10.4028/www.scientific.net/AMM.405408.1489.
  26. Wu, B., Chen, X., Wang, Q., Liao, H. and Dong, J. (2020), "Characterization of vibration amplitude of nonlinear bridge flutter from sectional model test to full bridge estimation", J. Wind Eng. Ind. Aerod., 197, 104048. https://doi.org/10.1016/j.jweia.2019.104048
  27. Zhang, M., Xu, F. and Ying, X. (2017), "Experimental investigations on the nonlinear torsional flutter of a bridge deck", J. Bridge Eng., 22(8), 04017048. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001082.
  28. Zhu, Z.W., Chen, Z.Q. and Gu, M. (2009), "CFD based simulations of flutter characteristics of ideal thin plates with and without central slot", Wind Struct., 12(1), 1-19. http://dx.doi.org/10.12989/ was.2009.12.1.001.
  29. Zhang, W., Qian, K., Xie, L. and Ge, Y.J. (2019), "An iterative approach for time domain flutter analysis of bridges based on restart technique", Wind Struct., 28(3), 171-180. https://doi.org/10.12989/was.2019.28.3.171.