Estimation of Damping Matrices of Cable-Stayed Bridges Based on Known Data of Modal Damping

Author

Zhan-Yu, Bu ; Xu, Xie ; Yong, Ding

Author_Institution

Fac. of Archit., Civil Eng. & Environ., Ningbo Univ., Ningbo, China

Volume

1

fYear

2010

fDate

13-14 Oct. 2010

Firstpage

683

Lastpage

688

Abstract

The composition of damping in cable-stayed bridges is complicated. It is difficult to determine the damping matrices precisely. A method to calculate the estimation of damping matrices of cable-stayed bridges by known damping ratios is proposed in this paper. Based on the assumption that the damping coefficients of substructures (i.e. Girder, tower, cable, support etc.) in cable-stayed bridges don´t change with frequency or amplitude of vibration, the complex eigenvector and natural frequency of cable-stayed bridges are derived by non-proportional damping state-space method. The results have high precision, which fulfill the requirement of dynamic calculation of structures. The damping matrices have more information than modal damping ratios, which has wide application in reality.

Keywords

bridges (structures); damping; eigenvalues and eigenfunctions; modal analysis; state-space methods; vibrations; cable-stayed bridges; complex eigenvector; damping matrices estimation; damping ratios; modal damping; natural frequency; nonproportional damping state-space method; substructures; vibration; Bridges; Damping; Equations; Mathematical model; Shape; Structural beams; Vibrations; cable-stayed bridge; damping identification; non-proportional damping;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent System Design and Engineering Application (ISDEA), 2010 International Conference on

Conference_Location

Changsha

Print_ISBN

978-1-4244-8333-4

Type

conf

DOI

10.1109/ISDEA.2010.27

Filename

5743272