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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2007.6
- 수록면
- 155 - 166 (12page)
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In this paper, the multimode frequency-domain approach is applied to the aerodynamic and aeroelastic analysis of cable-stayed bridges that consider construction sequence and temporary stabilizing measures. The accuracy of the analytical and experimental methods used for predicting prototype bridge performance is fundamentally important in assessing bridge safety. Numerical models for accurate buffeting analysis of cable-stayed bridges, especially free cantilever superstructures, are deduced for the vibrations due to extraneously induced excitation caused by turbulence. The expected goal is to develop numerical models upon which to base reliable studies of detailed three-dimensional structural models of bridges.
The power spectral density and elemental internal forces of a cable-stayed bridge structure are computed using the developed computational code based on the finite element method and random vibration theory. To determine the aero elastic and aerodynamic parameters of a cable-stayed bridge, section model tests were performed in a wind tunnel. Full aeroelastic model tests are investigated to verify a simulation modeling strategy which is efficient and accurate for two types of cable-stayed bridges with various stabilizing measures in turbulent wind. Moreover, the effects of dynamic transverse wind on cable-stayed bridges for various wind cable arrangements at different stages of completion are investigated. This suggests the most effective placement of wind cables. It is concluded that the multi-mode frequency-domain approach can predict the deflections of the bridge girder and the pylon base moments of the bridge with acceptable accuracy.
The power spectral density and elemental internal forces of a cable-stayed bridge structure are computed using the developed computational code based on the finite element method and random vibration theory. To determine the aero elastic and aerodynamic parameters of a cable-stayed bridge, section model tests were performed in a wind tunnel. Full aeroelastic model tests are investigated to verify a simulation modeling strategy which is efficient and accurate for two types of cable-stayed bridges with various stabilizing measures in turbulent wind. Moreover, the effects of dynamic transverse wind on cable-stayed bridges for various wind cable arrangements at different stages of completion are investigated. This suggests the most effective placement of wind cables. It is concluded that the multi-mode frequency-domain approach can predict the deflections of the bridge girder and the pylon base moments of the bridge with acceptable accuracy.
목차
Abstract
1. Introduction
2. Description of Structural Element
3. Modeling of Unsteady Aerodynamic Forces
4. Buffeting Analyses
5. Comparison with Analytical and Experimental Results
6. Concluding Remarks
References
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