摘要Based on the 5 000 m super span Qiongzhou Strait suspension bridge with as the engineering background. On the basis of the parallel steel cable suspension bridge, the hyperbolic paraboloid carbon fiber cable net is added to form a new structural system of super long span hyperbolic paraboloid spatial mixed cable suspension bridge. The parallel steel cables bear vertical loads, and the hyperbolic paraboloid carbon fiber spatial cables improve the spatial stiffness of the super long span Strait suspension bridge,and the two groups of cables are mixed to work together.The model of MIDAS finite element analysis is established to analyze the internal force and dynamic modal characteristics of the structure.The results show that:the ratio of torsional frequency to bending frequency and torsional frequency of hyperbolic paraboloid spatial mixed cable suspension bridge are significantly improved, and it has good wind resistance stability. The flutter critical wind speed of parallel steel wire cable suspension bridge is 23.35 m/s, and that of hyperbolic paraboloid spatial mixed cable suspension bridge is 78.34 m/s. In order to resist the super strong typhoon once in a hundred years in Qiongzhou Strait, the technical measures of setting temporary additional anti wind cables are put forward based on the principle of ship anchor cables. The flutter critical wind speed can reach 104.6 m/s. Therefore, the wind stability problem of the 5 000 m Qiongzhou Strait super long span suspension bridge is fundamentally solved.
Abstract：Based on the 5 000 m super span Qiongzhou Strait suspension bridge with as the engineering background. On the basis of the parallel steel cable suspension bridge, the hyperbolic paraboloid carbon fiber cable net is added to form a new structural system of super long span hyperbolic paraboloid spatial mixed cable suspension bridge. The parallel steel cables bear vertical loads, and the hyperbolic paraboloid carbon fiber spatial cables improve the spatial stiffness of the super long span Strait suspension bridge,and the two groups of cables are mixed to work together.The model of MIDAS finite element analysis is established to analyze the internal force and dynamic modal characteristics of the structure.The results show that:the ratio of torsional frequency to bending frequency and torsional frequency of hyperbolic paraboloid spatial mixed cable suspension bridge are significantly improved, and it has good wind resistance stability. The flutter critical wind speed of parallel steel wire cable suspension bridge is 23.35 m/s, and that of hyperbolic paraboloid spatial mixed cable suspension bridge is 78.34 m/s. In order to resist the super strong typhoon once in a hundred years in Qiongzhou Strait, the technical measures of setting temporary additional anti wind cables are put forward based on the principle of ship anchor cables. The flutter critical wind speed can reach 104.6 m/s. Therefore, the wind stability problem of the 5 000 m Qiongzhou Strait super long span suspension bridge is fundamentally solved.
徐文平, 袁吉汗, 王天宇, 韩融, 康一鸣. Wind Resistance Measures of 5 000 m Spatial Hybrid Cable Suspension Bridge in Qiongzhou Strait[J]. Journal of Highway and Transportation Research and Development, 2021, 15(4): 67-75.
XU Wen-ping, YUAN Ji-han, WANG Tian-yu, HAN Rong, KANG Yi-ming. Wind Resistance Measures of 5 000 m Spatial Hybrid Cable Suspension Bridge in Qiongzhou Strait. Journal of Highway and Transportation Research and Development, 2021, 15(4): 67-75.
[1] XIANG Hai-fan GE Yao-jun. On Aerodynamic Limits to Suspension Bridges[J]. China Civil Engineering Journal, 2005, 38(1):60-70. (in Chinese) [2] XU Run-dong, ZHENG Kai-feng. Aseismic Analysis of a Suspension Bridge for Highway and Railway in Qiongzhou Strait by Power Spectrum Method[J]. Highway, 2011(5):62-66. (in Chinese) [3] ASTIZ M. Flutter Stability of Very Long Suspension Bridges[J]. Journal of Bridge Engineering, 1998, 3(3):132-139. [4] ZHANG Xin-jun. Study of the Wind Stability of Long-span Suspension Bridges with Spatial Cable Systems[J]. China Civil Engineering Journal, 2011, 44(6):80-86. (in Chinese) [5] TANG H J, LI Y L, SHUM K M. Flutter Performance of Long-span Suspension Bridges under Non-uniform Inflow[J]. Advances in Structural Engineering, 2018(2):201-213. [6] CHEN Ze. Conceptual Design and Wind Resistance Research of the 5000m-span Suspension Bridge with CFRP Cables[D]. Chengdu:Southwest Jiaotong University, 2016. (in Chinese) [7] ABBAS T, KAVRAKOV I, MORGENTHAL G. Methods for Flutter Stability Analysis of Long-span Bridges:A Review[J]. Bridge Engineering, 2017(4):271-310. [8] TANG M C. Super-long Span Bridges[J]. Structure and Infrastructure Engineering, 2017, 13(6):722-730. [9] DU Yao-dong, Song Li-li, MAO Hui-qin et al. Wind Speed Observation and Design Wind Speed Calculation for Cross-channel Project over Qiongzhou Strait[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2005, 44(2):98-101. (in Chinese)
2021, Vol. 15 
