Theoretical Analysis of Dynamic Behaviors of Cable-Stayed Bridges Excited by Two Harmonic Forces
Abstract
To better understand the dynamic behaviors of cable-stayed bridges, this study investigates the dynamic behaviors of a cable-stayed shallow arch subjected to two external harmonic excitations using the analytical approach. First, dimensionless planar vibration equations of the system are obtained by applying the Hamilton principle, and three ordinary differential equations of the arch and the two cables are obtained by using the Galerkin discretization method. Second, modulation equations involving the amplitude and phase of the dynamic response of the system are derived by applying the method of multiple scales. Third, three simultaneous resonance cases are considered. Finally, parametric study results are illustrated through frequency responses, amplitude responses, phase plane and bifurcation diagrams. Chaos phenomenon is also detected and presented. To validate the developed analytical solutions, numerical simulations are conducted by applying the Runge–Kutta method to integrate the original ordinary differential equations. The results demonstrate that acceptable consistency is reached in the results obtained from the analytical solutions and the Runge–Kutta method in the three simulated cases. The obtained results show that the system’s dynamic responses in the three simulated cases exhibit similarities in their frequency and amplitude responses, while some qualitative differences exist in the phase plane portraits (e.g., period-1, period-2, period-3 solutions) and their bifurcation diagrams.
Recommended Citation
H. Kang et al., "Theoretical Analysis of Dynamic Behaviors of Cable-Stayed Bridges Excited by Two Harmonic Forces," Nonlinear Dynamics, vol. 102, no. 2, pp. 965 - 992, Springer, Oct 2020.
The definitive version is available at https://doi.org/10.1007/s11071-020-05763-8
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
Center for High Performance Computing Research
Second Research Center/Lab
Intelligent Systems Center
Keywords and Phrases
Bifurcation; Cable-stayed bridge; Frequency response; Multi-frequency excitation; Nonlinear response
International Standard Serial Number (ISSN)
0924-090X; 1573-269X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2020 The Authors, All rights reserved.
Publication Date
01 Oct 2020
Comments
National Natural Science Foundation of China, Grant 11502076