INVESTIGATION OF DAMPING MATRICES ACCURATE ESTIMATION OF CABLE-STAYED BRIDGES BASED ON NON-PROPORTIONAL DAMPING

Bu Zhan-yu; Ding Yong; Xie Xu; Huang Jian-yuan

doi:10.13204/j.gyjz201210016

Volume 42 Issue 10

Dec. 2014

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Bu Zhan-yu, Ding Yong, Xie Xu, Huang Jian-yuan. INVESTIGATION OF DAMPING MATRICES ACCURATE ESTIMATION OF CABLE-STAYED BRIDGES BASED ON NON-PROPORTIONAL DAMPING[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(10): 67-71,149. doi: 10.13204/j.gyjz201210016

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Bu Zhan-yu, Ding Yong, Xie Xu, Huang Jian-yuan. INVESTIGATION OF DAMPING MATRICES ACCURATE ESTIMATION OF CABLE-STAYED BRIDGES BASED ON NON-PROPORTIONAL DAMPING[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(10): 67-71,149. doi: 10.13204/j.gyjz201210016

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INVESTIGATION OF DAMPING MATRICES ACCURATE ESTIMATION OF CABLE-STAYED BRIDGES BASED ON NON-PROPORTIONAL DAMPING

doi: 10.13204/j.gyjz201210016

1.
1. Faculty of Architecture,Civil Engineering and Environment of Ningbo University,Ningbo 315211,China;
2.
2. College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China

Received Date: 2011-09-26
Publish Date: 2012-10-20

Abstract

Abstract

The damping makeup of cable-stayed bridges is complicated.It is a tough work to determine the damping matrices accurately.On the assumption of the damping coefficients of substructures in cable-stayed bridge (such as girder,tower,cable and support etc) are constant value and don't vary with frequency or vibration amplitude.An iteration method of damping coefficients and damping matrices estimation was presented.It was based on several known modal damping ratios,through the calculation of complex damped frequency and modal shape utilizing the state-space methodology.With the theory of non-proportional damping calculation of cable-stayed bridge, incorporating parameter sensitivity analysis and the least square optimization procedure,the damping coefficients of substructures were accurately determined,and the damping matrices were estimated with relatively high accuracy． Which provided a basis for setting up accurate finite element model of cable-stayed bridges．
- cable-stayed bridge,
- non-proportional damping,
- damping ratio,
- damping matrices,
- accurate estimation

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References(5)

References

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[3] Yoshikazu Yamada，Kenji Kawano.Dynamic Response Analysis ofSystems with Non-Proportional Damping[C]/ /Proceedings of the4th Japan Earthquake Engineering Symposium.Tokyo: 1975:823-830.

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