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Abstract: Stay cables, the primary load carrying components of cable-stayed bridges (CSBs), are characterised by high flexibility which increases with the span of the bridge. This makes stay cables vulnerable to local vibrations which may have significant effects on the dynamic responses of long-span CSBs. Hence, it is essential to account for these effects in the assessment of the dynamics CSBs. In this paper, the dynamic responses of CSBs under vehicular loads are studied using the finite element method (FEM), while the local vibration of stay cables is analyzed using the substructure method. A case study of a cable-stayed steel bridge with a center span of 448 m demonstrates that stay cables undergo large displacements in the primary mode of the whole bridge although, in general, a cable’s local vibrations are not obvious. The road surface roughness has significant effects on the interaction force between the deck and vehicle but little effect on the global response of the bridge. Load impact factors of the main girder and tower are small, and the impact factors of the tension of cables are larger than those of the displacements of girders and towers.

[1]Abdel-Ghaffar, A.M., Khalifa, M.A., 1991. Importance of cable vibration in dynamics of cable-stayed bridges. ASCE Journal of Engineering Mechanics, 117(11):2571-2589.

[2]Au, F.T.K., Cheng, Y.S., Cheung, Y.K., 2001. Effects of random road surface roughness and long-term deflection of pre-stressed concrete girder and cable-stayed bridges on impact due to moving vehicles. Computers and Structures, 79(8):853-872.

[3]Au, F.T.K., Lou, P., Li, J., Jiang, R.L., Leung, C.C.Y., Lee, P.K.K., Wong, K.Y., Chan, H.Y., 2009. Simulation of Vibrations of Ting-Kau Bridge due to Vehicular Loading. Proceeding of 4th International Symposium on Environment Vibrations–Prediction, Monitoring, Mitigation and Evaluation, Beijing, China, p.1109-1116.

[4]Bruno, D., Greco, F., Lonetti, P., 2008. Dynamic impact analysis of long span cable-stayed bridges under moving loads. Engineering Structures, 30(4):1160-1177.

[5]Caetano, E., Cunha, A., Taylor, C.A., 2000. Investigation of dynamic cable-deck interaction in a physical model of a cable-stayed bridge, Part I: modal analysis. Earthquake Engineering and Structural Dynamics, 29(4):481-498.

[6]Caetano, E., Cunha, A, Gattulli, V., Lepidi, M., 2008. Cable-deck dynamic interactions at the International Guadiana Bridge: on-site measurements and finite element modeling. Structural Control and Health Monitoring, 15(3):237-264.

[7]Calcada, R., Cunha, A., Delgado, R., 2005a. Analysis of traffic-induced vibrations in a cable-stayed bridge. Part I: Experimental assessment. ASCE Journal of Bridge Engineering, 10(4):370-385.

[8]Calcada, R., Cunha, A., Delgado, R., 2005b. Analysis of traffic-induced vibrations in a cable-stayed bridge. Part II: Numerical modeling and stochastic simulation. ASCE Journal of Bridge Engineering, 10(4):386-397.

[9]Das, A., Dutta, A., Talukdar, S., 2004. Efficient dynamic analysis of cable-stayed bridges under vehicular movement using space and time adaptivity. Finite Elements in Analysis and Design, 40(4):407-424.

[10]Fujino, Y., Warnitchai, P., Pacheco, B.M., 1993. An experimental and analytical study of autoparametric resonance in a 3DOF model of cable-stayed-beam. Nonlinear Dynamics, 4:111-138.

[11]Gattulli, V., Lepidi, M., 2007. Localization and veering in cable-stayed bridge dynamics. Computer and Structures, 85(21-22):1661-1668. [doi:10.1016/j.compstruc.2007.02. 016]

[12]Guo, W.H., Xu, Y.L., 2001. Fully computerized approach to study cable-stayed bridge-vehicle interaction. Journal of Sound and Vibration, 248(4):745-761.

[13]ISO-8608, 1995. Mechanical Vibration-Road Surface Profiles Reporting of Measured Data. International Organization for Standardization (ISO).

[14]Nagai, M., Nii, J., Kawabata, O., 1993. Three Dimensional Dynamic Analysis of Cable-Stayed Bridges Including Cable Local Vibration. Proceeding of 4th East Asia-Pacific Conference on Structural Engineering & Construction, Seoul, Korea, p.1845-1850.

[15]Task Committee on Bridge Vibration, JSCE, 1993. Measurement and Evaluation of Bridges Vibration. Gihodo Shuppan, Tokyo (in Japanese).

[16]Warnitchai, P., Fujino, Y., Susumpow, T., 1995. A non-linear dynamic model for cables and its application to a cable-structure system. Journal of Sound and Vibration, 187(4):695-712.

[17]Wu, Q., Takahashi, K., Okabayashi, T., Nakamura, S., 2003. Response characteristics of local vibrations in stay cables on an existing cable-stayed bridge. Journal of Sound and Vibration, 261(3):403-420.

[18]Zaman, M., Taheri, M.R., Khanna, A., 1996. Dynamic response of cable-stayed bridges due to moving vehicles using the structural impedance method. Applied Mathematical Modelling, 20(12):877-889.