Random Vibrations of a Cable-Stayed Bridge under Multi-Dimensional Seismic Excitations

Abstract:

It is a challenging problem for scientists and engineers to calculate the random vibration responses of a large scale engineering structure, during which, the calculating efficiency and accuracy are always the main concerns. In civil engineering, there are some even more difficult cases that have to be considered, such as a large span cable-stayed bridge under multi-dimensional seismic loads consisting of evolutionary random processes. In this paper, such a problem is analyzed by using equivalent excitation method, in which the equivalent excitations are constructed by using continuous wavelet transform, and the affections of multi-dimensional seismic excitations are investigated. Simulations of a typical cable-stayed bridge show some of the plausible features of the method presented.

• Periodical: Advanced Materials Research (Volumes 753-755)
• Pages: 1119-1123
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.753-755.1119
• Online since: August 2013
• Authors: Zuo Yu Sun, Hui Wang, Ming Sheng Fang, Ke Yang Mao
• Keywords: Cable-Stayed Bridge, Continuous Wavelet Transform, Equivalent Excitation Method, Evolutionary Random Process, Multi-Dimensional Seismic Excitations, Random Vibration

References

[1] W.Q. Zhu, Random Vibration, Science Press, Beijing, 1992(in Chinese).

[2] J.P. Ou, G.Y. Wang, Structural Random Vibration. Higher Education Press, Beijing, 1992(in Chinese).

[3] J.H. Lin, Y.H. Zhang, Pseudo-Excitation Method for Random Vibration. Science Press, Beijing, 2006(in Chinese).

[4] J.H. Lin, W.X. Zhong, W.S. Zhang, D.K. Sun, High efficiency computation of the variances of structural evolutionary random responses. Shock & Vibration, 2000, 7(4): 209~216.

DOI: 10.1155/2000/178090

[5] Z.Y. Sun, H. Wang, Equivalent excitation method for structural random vibration analysis. Engineering Mechanics, 2010(SI): 20-22(in Chinese).

[6] W.X. Zhong, Z.G. Wu, S.J. Tan, Control Theory in Sate Space. Science Press, Beijing, 2007(in Chinese).

[7] Y. Tang, Z.Y. Sun, H. Wang, Random vibration analysis of controlled building based on the equivalent excitation method. Information Technology and Architecture Engineering (ITAE2012), 2012, 4: 456~459.

[8] M.B. Priestley, Evolutionary spectra and non-stationary random process. J. R. Statst. Soc. Ser. B, 1965, 28(2): 204~230.

[9] K.C. Charles, an Introduction to Wavelets. Posts and Telecom Press, Beijing, (2009).