Effects of fundamental factors on coupled vibration of wind-rail vehicle-bridge system for long-span cable-stayed bridge

Abstract

In a wind-vehicle-bridge (WVB) system, there are various interactions among wind, vehicle and bridge. The mechanism for coupling vibration of wind-vehicle-bridge systems is explored to demonstrate the effects of fundamental factors, such as mean wind, fluctuating wind, buffeting, rail irregularities, light rail vehicle vibration and bridge stiffness. A long cable-stayed bridge which carries light rail traffic is regarded as a numerical example. Firstly, a finite element model is built for the long cable-stayed bridge. The deck can generally be idealized as three-dimensional spine beam while cables are modeled as truss elements. Vehicles are modeled as mass-spring-damper systems. Rail irregularities and wind fluctuation are simulated in time domain by spectrum representation method. Then, aerodynamic loads on vehicle and bridge deck are measured by section model wind tunnel tests. Eight vertical and torsional flutter derivatives of bridge deck are identified by weighting ensemble least-square method. Finally, dynamic responses of the WVB system are analyzed in a series of cases. The results show that the accelerations of the vehicle are excited by the fluctuating wind and the track irregularity to a great extent. The transverse forces of wheel axles mainly depend on the track irregularity. The displacements of the bridge are predominantly determined by the mean wind and restricted by its stiffness. And the accelerations of the bridge are enlarged after adding the fluctuating wind.

Keywords

wind-vehicle-bridge system / coupled vibration / long-span cable-stayed bridge / fundamental factors

References

[1] XieG-h, LiuR-g, CaiD-s, ChenBei. Calculation model and mechanism analysis for rain-wind-induced vibration of stay cable [J]. Journal of Central South University, 2014, 21(3): 1107-1114

[2] XiangH-y, LiY-l, ChenBo. Protection effect of railway wind barrier on running safety of train under cross winds [J]. Advances in Structural Engineering, 2014, 17(8): 1177-1187

[3] ZhangZ-t, GeY-j, ZhangW-feng. Superposability of unsteady aerodynamic loads on bridge deck sections [J]. Journal of Central South University, 2013, 20(11): 3202-3215

[4] LiY-l, HuP, CaiC S. Wind tunnel study of a sudden change of train wind loads due to the wind shielding effects of bridge towers and passing trains [J]. Journal of Engineering Mechanics, 2013, 139(9): 1249-1259

[5] ZhaiW-m, XiaH, CaiC-biao. High-speed train-track-bridge dynamic interactions part I: Theoretical model and numerical simulation [J]. International Journal of Rail Transportation, 2013, 1(1/2): 3-24

[6] LiY-l, QiangS-z, LiaoH-l, XuY-lin. Dynamics of wind-rail vehicle-bridge systems [J]. Journal of Wind engineering and Industrial Aerodynamics, 2005, 93(5): 483-507

[7] XuY-l, GuoW H. Dynamic analysis of coupled road vehicle and cable-stayed bridge systems under turbulent wind [J]. Engineering Structures, 2003, 25(4): 473-486

[8] XuY-l, XiaH, YanQ S. Dynamic response of suspension bridge to high wind and running train [J]. Journal of Bridge Engineering, 2003, 8(1): 46-55

[9] CaiC S, ChenS R. Framework of vehicle-bridge-wind dynamic analysis [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92(7): 579-607

[10] ChenS R, CaiC S. Accident assessment of vehicles on long-span bridges in windy environments [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92(12): 991-1024

[11] XuY-l, GuoW H. Effects of bridge motion and crosswind on ride comfort of road vehicles [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92(8): 641-662

[12] GuoW H, XuY-lin. Safety analysis of moving road vehicles on a long bridge under crosswind [J]. Journal of Engineering Mechanics, 2006, 132(4): 438-446

[13] KwonS D, LeeJ S, MoonJ W, KimM Y. Dynamic interaction analysis of urban transit maglev vehicle and guideway suspension bridge subjected to gusty wind [J]. Engineering Structure, 2008, 30(12): 3445-3456

[14] XiaH, GuoW W, ZhangN, SunG J. Dynamic analysis of a train-bridge system under wind action [J]. Computers and Structures, 2008, 86(19): 1845-1855

[15] ChenZ-w, XuY-l, LiQi. Dynamic stress analysis of long suspension bridges under winds, railway, and highway loadings [J]. Journal of Bridge Engineering, 2011, 16(3): 383-391

[16] LiY-l, XiangH-y, WangB, XuY-lin. Dynamic analysis of wind-vehicle-bridge coupling system during the meeting of two trains [J]. Advances in Structural Engineering, 2013, 16(10): 1663-1670

[17] DeodatisG. Simulation of ergodic multivariate stochastic processes [J]. Journal of Engineering Mechanics, 1996, 8(4): 778-787

[18] LiY-l, LiaoH-l, QiangS-zhong. Simplifying the simulation of stochastic wind velocity fields for long cable-stayed bridges [J]. Computers and Structures, 2004, 82(20/21): 1591-1598

[19] GargV K, DukkipR VDynamics of railway vehicle systems [M], 1984CanadaAcademic Press

[20] SimiuP D, ScanlanR HWind effects on structures [M], 19963New YorkJohn Wiley & Sons

[21] LiY-leNonlinear three-dimensional coupling vibration of wind-vehicle-bridge systems [D], 2003ChengduSouthwest Jiaotong University

[22] ScanlanR H, JonesN P. Aeroelastic analysis of cable-stayed bridges [J]. Journal of Structural Engineering, 1990, 116(2): 279-297