Galloping analysis for transient main cables of long-span suspension bridge at construction stages
The cross-sectional shapes of the transient main cables are not the circular cross-sections at construction stages of the long-span suspension bridge, so the transient main cables might experience galloping instabilities. The galloping coefficients and the galloping critical wind speeds of the transient main cables of the Xihoumen suspension bridge were investigated using the softwares of the CFD and finite element. Results show that at the early stages of the main cablesconstruction,i.e. Case 1～3, the galloping instability can occur, but at the later stages of that, I.e. Case 4 and 5, the galloping instability cannot occur. The range of mean wind angle of incidence to the galloping instability has the increasing trend companying with continued construction of the cable strands. The wind angle of incidence for 3, 4, 5and 8 degrees of case 1, -1and 1 degrees of case 2, and -6 and 5 degrees of case 3 corresponding to the galloping critical wind velocities are under the design wind speeds for the main cables at construction stages. The galloping performances for the transient main cables of the long-span suspension bridge were elementarily investigated by the numerical analysis. The results obtained in this paper can provide the theory reference for the galloping stability control of the transient main cables of the long-span suspension bridge at the construction stages.
bridge engineering transient main cables CFD and finite element galloping analysis suspension bridge
Shengli Li Jinping Ou
School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;School of Civil and H
国际会议
第六届国际振动工程会议(The 6th International Conference on Vibration Engineering)(ICVE’ 2008)
大连
英文
2008-06-04（万方平台首次上网日期，不代表论文的发表时间）