Dynamic analysis of coupled road vehicle and cable-stayed bridge systems under turbulent wind

• Published in: Engineering structures Vol. 25; no. 4; pp. 473 - 486
• Main Authors: Xu, Y.L., Guo, W.H.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 01.03.2003; Elsevier
• Subjects: Applied sciences; Bridges; Buffeting force; Buildings. Public works; Cable-stayed bridge; Case study; Climatology and bioclimatics for buildings; Dynamic interaction; Exact sciences and technology; Road roughness; Road vehicle; Self-excited force; Stresses. Safety; Structural analysis. Stresses; Suspension bridges. Stayed girder bridges. Bascule bridges. Swing bridges; Turbulent wind; Case study; Road roughness; Road vehicle; Cable-stayed bridge; Turbulent wind; Buffeting force; Dynamic interaction; Self-excited force; Dynamic response; Structural design; Equation of motion; Force field; Wind effect; Rough surface; Finite element method; Stayed girder bridge; Soil vehicle interaction; Numerical simulation; Aerodynamic characteristic; Turbulence intensity; Dynamic model; Road bridge
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/S0141-0296(02)00188-8

This paper presents a framework for performing dynamic analysis of coupled road vehicle and cable-stayed bridge systems under turbulent winds. Road vehicles are idealized as a combination of a number of rigid bodies connected by a series of springs and dampers. A cable-stayed bridge is modeled using the three-dimensional finite element method. The random roughness of the bridge deck is generated from a power spectral density function for the given road condition. Wind forces acting on the bridge, including buffeting forces and self-exciting forces, are simulated in the time domain using a fast spectral representation method, the aerodynamic admittance functions, the aerodynamic coefficients, and the flutter derivatives. The quasi-steady model is employed to generate crosswind forces on the road vehicles. The equations of motion of the coupled road vehicle-bridge system under turbulent winds are assembled using a fully computerized approach. The proposed framework is then applied to a real long span cable-stayed bridge with a group of moving high-sided road vehicles under turbulent winds. The results demonstrate that the proposed framework and the associated computer program can efficiently predict the dynamic response of coupled road vehicle and cable-stayed bridge systems subject to turbulent winds under a normal operation condition.