Study on Stability Improvement of Suspension Bridge with High-Sided Vehicles under Wind using Tuned-Liquid-Damper

Abstract

Smooth and safe traffic on the highway system is crucial for a modern society. As the backbone of a highway system, key long-span suspension bridges as well as moving high-sided vehicles on the bridges are vulnerable to strong wind. Excessive vibration of bridges and vehicles may cause the bridge aerodynamic instability and vehicle accidents. When wind is strong, the excessive torsional response of the bridge also contributes to the discomfort of drivers or the occurrence of overturning accidents of vehicles moving on it. Potentials of adopting the tuned-liquid-damper (TLD) system as an enhancement measure for the stability of suspension bridges with high-sided vehicles are evaluated. Firstly, a general shallow water sloshing model in rectangular containers under off-axle rotation, lateral and vertical excitations is developed. The analytical platform of the general 3-D bridge—vehicle—TLD system under wind and road roughness excitations is introduced. Secondly, a parametric study of the off-axle TLDs in controlling torsional motion of a simple single torsional mode bridge model under broadband white noise excitation is conducted to investigate the effectiveness and mechanism of the TLD on torsional motion. Finally, a numerical analysis of TLDs installed on a real suspension bridge—vehicle—wind system in time history is carried out considering interactions between the multimode bridge structure, multiple vehicles and the wind excitation. The results suggest that the off-axle TLD system can effectively suppress the torsional response of the suspension bridge through acting as a pendulum damper in addition to a typical sloshing damper, but has little direct suppression effect on the vibrations of vehicles.

Keywords

TLD suspension bridge vehicle sloshing.

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References

Baker, C.J. , 1999, "The quantification of accident risk for road vehicles in cross winds," Journal of Wind Engineering and Industrial Aerodynamics 52, 93-107.

Cai, C.S. and Chen, S.R. 2004, "Framework of vehicle-bridge-wind dynamic analysis ," Journal of Wind Engineering and Industrial Aerodynamics 92(7-8), 579-607.

Chaiseri, P. , Fujino, Y. , Pacheco, B.M. , and Sun, L.M. , 1989, "Interaction of tuned liquid damper (TLD) and structure - theory, experimental verification and application," JSCE Structural Engineering and Earthquake Engineering 6(2), 273s-282s.

Chang, C.C. and Qu, W.L. 1998, "Unified dynamic absorber design formulas for wind-induced vibration control of tall buildings," Structural Design of Tall Buildings 7, 1-20.

Chen, S.R. , 2004, "Dynamic performance of bridges and vehicles under strong wind," PhD dissertation, Louisiana State University .

Chen, S.R. and Cai, C.S. , 2004, "Accident assessment of vehicles on long-span bridges in windy environments," Journal of Wind Engineering and Industrial Aerodynamics 92(12), 991-1024.

Delorme, L. , Souto Iglesoas, A. , and Abril Pérez, S. , 2005, "Sloshing loads simulation in LNG tankers with SPH," in Computational Methods in Marine Engineering, MARINE 2005, Oslo, Norway, June 27-29.

Den Hartog, J.P. , 1956, Mechanical Vibrations, 4th Edition, McGraw-Hill New York .

Fediw, A.A. , Isyumov, N. , and Vickery, B.J. 1995, "Performance of a tuned sloshing water damper," Journal of Wind Engineering and Industrial Aerodynamics 57, 237-247.

10.

Fujino, Y. , Pacheco, B.M. , Chaiseri, P. , and Sun, L.M. , 1988, "Parametric studies on tuned liquid damper (TLD) using circular containers by free-oscillation experiments," JSCE Structural Engineering and Earthquake Engineering 5(2), 381s-391s.

11.

Fujino, Y. , Sun, L.M. , Pacheco, B.M. , and Chaiseri, P. 1992, "Tuned liquid damper (TLD) for suppressing horizontal motion of structures," ASCE Journal of Engineering Mechanics 118(10), 2017-2030.

12.

Haroun, M.A. and Ellaithy, H.M. 1985, "Model for flexible tanks undergoing rocking," ASCE Journal of Engineering Mechanics 111(2), 143-157.

13.

Iglesias, A.S. , Rojas, L.P. , and Rodriguez, R.Z. , 2004, "Simulation of anti-roll tanks and sloshing type problems with smoothed particle hydrodynamics," Ocean Engineering 31, 1169-1192.

14.

Kareem, A. and Sun, W.J. , 1987, "Stochastic responses of structures with fluid containing appendages," Journal of Sound and Vibration 119(3), 389-408.

15.

Koh, H.M. , Kim, J.K. and Park, J.H. , 1998, "Fluid-structure interaction analysis of 3-d rectangular tanks by a variationally coupled BEM-FEM and comparison with test-results ," Earthquake Engineering and Structural Dynamics 27(2), 109-124.

16.

Modi, V.J. and Seto, M.L. , 1997, "Suppression of flow-induced oscillations using sloshing liquid dampers: analysis and experiments," Journal of Wind Engineering and Industrial Aerodynamics 67-68, 611-625.

17.

Modi, V.J. and Welt, F. 1987, "Vibration control using nutation dampers," in Proceedings of the International Conference on Flow Induced Vibration , England, pp. 369-376.

18.

Peek, R. and El-Bkaily, M. 1997, "Mechanical analogies for liquid storage tanks and action of eccentric gravity loads," ASCE Journal of Engineering Mechanics 123(6), 561-567.

19.

Sun, L.M. , Fujino, Y. , Chaiseri, P. and Pacheco, B.M. , 1995, "The properties tuned liquid dampers using a TMD analogy ," Earthquake Engineering and Structural Dynamics 24, 967-976.

20.

Sun, L.M. , Fujino, Y. and Koga, K. , 1995, "A model of tuned liquid damper for suppressing pitching motions of structures," Earthquake Engineering and Structural Dynamics 24, 625-636.

21.

Veletsos, A. and Tang, Y. 1987, "Rocking response of liquid storage tanks," ASCE Journal of Engineering Mechanics 113(11), 1774-1792.

22.

Watanabe, S. 1969, "Methods of vibration reduction," in Proceedings of the Japan Naval Arch. Society Symposium, pp. 156-179.

23.

Xue, S.M. , Ko, J.M. , and Xu, Y.L. 2000, "Tuned liquid column damper for suppressing pitching motion of structures," Engineering Structures 23, 1538-1551.

24.

Yalla, S.K. and Kareem, A. , 1999 "Modeling of TLDs as sloshing-slamming dampers," Wind Engineering into the 21st Century: in Proceedings of the 10th International Conf erence on Wind Engineering, Copenhagen , Denmark, June 21-24, pp. 1569-1575.

25.

Yalla, S.K. and Kareem, A. 2000, "Optimum absorber parameters for tuned liquid column dampers ," ASCE Journal of Structural Engineering 126(8), 906-915.

26.

Yalla, S.K. and Kareem, A. , 2003, "Semiactive tuned liquid column dampers: experimental study," ASCE Journal of Structural Engineering 129(7), 960-971.