宫成, 刘志文, 谢钢, 龚平. 高墩大跨斜拉桥悬臂施工期风致振动控制[J]. 工程力学, 2015, 32(增刊): 122-128. DOI: 10.6052/j.issn.1000-4750.2014.05.S005
引用本文: 宫成, 刘志文, 谢钢, 龚平. 高墩大跨斜拉桥悬臂施工期风致振动控制[J]. 工程力学, 2015, 32(增刊): 122-128. DOI: 10.6052/j.issn.1000-4750.2014.05.S005
GONG Cheng, LIU Zhi-wen, XIE Gang, GONG Ping. CONTROL OF WIND-INDUCED VIBRATION IN LARGE SPAN CABLE-STAYED BRIDGE WITH HIGH PIERS DURING CANTILEVER CONSTRUCTION STAGES[J]. Engineering Mechanics, 2015, 32(增刊): 122-128. DOI: 10.6052/j.issn.1000-4750.2014.05.S005
Citation: GONG Cheng, LIU Zhi-wen, XIE Gang, GONG Ping. CONTROL OF WIND-INDUCED VIBRATION IN LARGE SPAN CABLE-STAYED BRIDGE WITH HIGH PIERS DURING CANTILEVER CONSTRUCTION STAGES[J]. Engineering Mechanics, 2015, 32(增刊): 122-128. DOI: 10.6052/j.issn.1000-4750.2014.05.S005

高墩大跨斜拉桥悬臂施工期风致振动控制

CONTROL OF WIND-INDUCED VIBRATION IN LARGE SPAN CABLE-STAYED BRIDGE WITH HIGH PIERS DURING CANTILEVER CONSTRUCTION STAGES

  • 摘要: 高墩大跨桥梁主梁双悬臂施工期自振频率低对风作用敏感,以在建的赤石大桥为背景进行高墩大跨斜拉桥悬臂施工风致振动控制研究。在综述高墩大跨桥梁施工抗风措施的基础上,结合赤石大桥实际特点提出“下拉索+TMD”抗风措施,基于Davenport抖振理论采用ANSYS APDL实现大跨桥梁抖振时域分析,最后对该桥施工抗风措施减振性能进行计算分析和现场实测。结果表明:采取“下拉索+TMD”施工抗风措施可以有效降低桥梁结构风致振动响应;该施工抗风措施减振效果计算值与现场实测结果总体吻合较好。

     

    Abstract: The natural frequency of large span cable-stayed bridges with high piers during cantilever construction stages is very low and it is sensitive to excitation due to wind. Control of wind-induced vibrations in large span cable-stayed bridges with high piers during their cantilever construction stage was investigated using the example of Chishi bridge, currently under construction. On the basis of a review of state-of-the-art of wind-induced vibration control measures for large span cable-stayed bridges with high piers, considering the unique factors of Chishi bridge, a wind-induced vibration control measure was selected: a combination of tie-down cables and TMD’s. A time domain buffeting analysis of large span bridges was conducted based on Davenport buffeting theory with ANSYS APDL language. Finally, numerical calculations and field measurement of the wind-induced vibration of Chishi bridge under cantilever construction stages with and without wind-induced vibrations control measures were conducted. The results show that wind-induced vibration responses can be reduced significantly using the wind-vibration control measures of tie-down cables and TMD’s. The numerical results regarding the effects of wind-induced vibrations control measures generally agree well with the field measured results.

     

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