- Volume 23 Issue 1
In the present study, a new methodology is presented to study the ride comfort and bridge responses of a long-span bridge-traffic-wind coupled vibration system considering stochastic characteristics of traffic flow and bridge surface progressive deterioration. A three-dimensional vehicle model with 24 degrees-of-freedoms (DOFs) including a three-dimensional non-linear suspension seat model and the longitudinal vibration of the vehicle is firstly presented to study the ride comfort. An improved cellular automaton (CA) model considering the influence of the next-nearest neighbor vehicles and a progressive deterioration model for bridge surface roughness are firstly introduced. Based on the equivalent dynamic vehicle model approach, the bridge-traffic-wind coupled equations are established by combining the equations of motion of both the bridge and vehicles in traffic using the displacement relationship and interaction force relationship at the patch contact. The numerical simulations show that the proposed method can simulate rationally the ride comfort and bridge responses of the bridge-traffic-wind coupled system; and the vertical, lateral, and longitudinal vibrations of the driver seat model can affect significantly the driver's comfort, as expected.
bridge;traffic;vibration;ride comfort;bridge surface
- Baker, C. J. (1991), "Ground vehicles in high cross winds. Part I: Unsteady aerodynamic forces", J. Fluid. Struct., 5, 91-111. https://doi.org/10.1016/0889-9746(91)80013-4
- Bouazara, M., Richard, M.J. and Rakheja, S. (2006), "Safety and comfort analysis of a 3-D vehicle model with optimal non-linear active seat suspension", J. Terramech., 43, 97-118. https://doi.org/10.1016/j.jterra.2004.10.003
- Cai, C.S., Hu, J., Chen, S., Han, Y., Zhang, W. and Kong, X. (2015), "A coupled wind-vehicle-bridge system and its applications: a review", Wind Struct., 20(2), 117-142. https://doi.org/10.12989/was.2015.20.2.117
- Chen, S.R. and Cai, C.S. (2004), "Accident assessment of vehicles on long-span bridges in windy environments", J. Wind Eng. Ind. Aerod., 92(12), 991-1024. https://doi.org/10.1016/j.jweia.2004.06.002
- Chen, Y.B. and Feng, M.Q. (2006), "Modeling of traffic excitation for system identification of bridge structures", Comput-Aided Civ. Infrastruct Eng , 21, 57-66.
- Chen, S.R. and Cai, C.S. (2007), "Equivalent wheel load approach for slender cable-stayed bridge fatigue assessment under traffic and wind: feasibility study", J. Bridge Eng., 12(6), 755-764. https://doi.org/10.1061/(ASCE)1084-0702(2007)12:6(755)
- Chen, S.R. and Wu, J. (2010), "Dynamic performance simulation of long-span bridge under combined loads of stochastic traffic and wind", J. Bridge Eng., 15(3), 219-230. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000078
- Chen, S.R. and Wu, J. (2011), "Modeling stochastic live load for long-span bridge based on microscopic traffic flow simulation", Comput. Struct., 89,813-824. https://doi.org/10.1016/j.compstruc.2010.12.017
- Clough, R.W. and Penzien, J. (1993), "Dynamics of structures" [M], New York, McGraw-Hill Inc.
- Deng, L. and Cai, C.S. (2010), "Bridge model updating using response surface method and genetic algorithm ", J. Bridge Eng., 5(15), 553-564.
- Fujii, S. and Yoshimoto, K. (1975), "An analysis of the lateral hunting motion of a two-axle railway wagon by digital simulation (1st report, the outline of the mathematical model)", Bull. JSME, 18(122), 813-818. https://doi.org/10.1299/jsme1958.18.813
- Fujii, S., Yoshimoto, K. and Kobayashi, F. (1975), "An analysis of the lateral hunting motion of a two-axle railway wagon by digital simulation (2nd report, the outline of the mathematical model)", Bull. JSME, 18(125), 1246-1251. https://doi.org/10.1299/jsme1958.18.1246
- Gim, G. and Nikravesh, P.E. (1990), "Analytical model of pneumatic types for vehicle dynamic simulations Part 1. Pure slips", Int. J. Vehicle Des., 11(5), 589-618.
- Guo, W.H. and Xu, Y.L. (2001), "Fully computerized approach to study cable-stayed bridge vehicle interaction", J. Sound Vib., 248(4), 745-761. https://doi.org/10.1006/jsvi.2001.3828
- Han, W., Ma, L., Cai, C.S., Chen, S. and Wu, J. (2015), "Nonlinear dynamic performance of long-span cable-stayed bridge under traffic and wind", Wind Struct., 20(2), 249-274. https://doi.org/10.12989/was.2015.20.2.249
- ISO. (1995), "Mechanical vibration-road surface profiles-reporting of measured data", ISO 8068: (E), Geneva.
- ISO. (1997), "Mechanical vibration and shock - Evaluation of human exposure to whole body vibration-Part1: General requirements", ISO 2631-1:1997E, Geneva.
- Park J.H., Huynh T.C., Lee K.S. and Kim J.T. (2016), "Wind and traffic-induced variation of dynamic characteristics of a cable-stayed bridge-benchmark study", Smart Struct. Syst., 17(3), 491-522. https://doi.org/10.12989/sss.2016.17.3.491
- Kong, X., Gao, Z. and Li, K. (2006), "A two lane celluar automata model with influence of next nearest neighbor vehicle", Commun. Theor. Phys., 45(4), 657-662. https://doi.org/10.1088/0253-6102/45/4/018
- Nagel, K. and Schreckenberg, M. (1992), "A cellular automaton model for freeway traffic", J. Phys. (France), 2(12), 2221-2229.
- Zhang, W. and Cai, C.S. (2012), "Fatigue reliability assessment for existing bridges considering vehicle speed and road surface conditions", J. Bridge Eng., 17(3), 443-453. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000272
- Xu, Y.L. and Guo, W.H. (2004), "Effects of bridge motion and crosswind on ride comfort of road vehicles", J. Wind Eng. Ind. Aerod., 92, 641-662. https://doi.org/10.1016/j.jweia.2004.03.009
- Yin, X.F., Fang, Z. and Cai, C.S. (2011), "Lateral vibration of high-pier bridges under moving vehicular loads", J. Bridge Eng., 16(3), 400-412. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000170
- Yu, L. and Chan, T.H. (2007), "Recent research on identification of moving loads on bridges", J. Sound Vib., 305(1-2), 3-21. https://doi.org/10.1016/j.jsv.2007.03.057
- Evaluation of the Wind-Resistant Performance of Long-Span Cable-Stayed Bridge Using the Monitoring Correlation between the Static Cross Wind and Its Displacement Response vol.2018, pp.1875-9203, 2018, https://doi.org/10.1155/2018/5369281
- The Aerodynamic Characteristics of Vehicle under Lateral Wind Action for the Process of Two Vehicles Passing Each Other vol.1064, pp.1742-6596, 2018, https://doi.org/10.1088/1742-6596/1064/1/012019
Supported by : Natural Science Foundation China