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工程力学  2015 

高墩大跨斜拉桥悬臂施工期风致振动控制

DOI: 10.6052/j.issn.1000-4750.2014.05.S005, PP. 122-128

Keywords: 高墩大跨斜拉桥,风致振动,振动控制,抖振时域分析,现场实测

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Abstract:

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ANSYSAPDL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。

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