大跨度变截面连续钢箱梁桥涡激振动线性分析法
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西华大学流体及动力机械教育部重点实验室,西南交通大学风工程试验中心 成都,西南交通大学风工程试验中心 成都

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U441. 3

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国家自然科学基金项目(50978223);国家重点基础研究发展计划(973计划)(2013CB036300)


A Linear Theory of Vortex-Induced Vibration of Long Span Continuous Steel Box Girder Bridge with Variable Cross-Section
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Key laboratory of fluid and power machine ministry education, Xihua University,Research Center for Wind Engineering,Southwest Jiaotong University,Chengdu Sichuan,Research Center for Wind Engineering,Southwest Jiaotong University,Chengdu Sichuan

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    摘要:

    涡激力沿主梁跨向具有偏相关性,基于Scanlan涡激力经验线性模型,假定涡激振动风速下,整个梁段涡脱频率锁定,提出适用于变截面连续梁桥的三维涡激力经验线性模型,从而建立节段模型与变截面梁实桥之间涡激振动幅值之间的关系。通过变截面梁几个典型位置截面的节段模型风洞试验,获得描述整个变截面主梁三维涡激力经验线性模型等效参数,实现对整个变截面连续梁桥涡激振动响应的评估。并通过某典型的三跨变截面连续钢箱梁桥涡激振动风洞试验,验证了理论的有效性。

    Abstract:

    Vortex-induced aerodynamic force was partial correlation along the span. Based on the Scanlan’s semi-empirical linear model, a linear theory of vortex induced vibration of the long span continuous steel box girder bridge with variable cross-section was established by assuming that the vortex shedding frequency of the whole span was locked in. The methodology for applying sectional models which were selected from typical position of variable cross-section box girder bridge into prototype bridge was discussed. The line theory parameters which provided detailed depiction of variable section box girder 3-D vortex induced force were obtained. And the vortex induced resonance of the whole span was evaluated. Validity of proposed theory was proved by a series of wind tunnel tests on a three spans continuous variable section bridge.

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秦浩,廖海黎,李明水.大跨度变截面连续钢箱梁桥涡激振动线性分析法[J].振动工程学报,2015,28(6).[Qin Hao, and. A Linear Theory of Vortex-Induced Vibration of Long Span Continuous Steel Box Girder Bridge with Variable Cross-Section[J]. Journal of Vibration Engineering,2015,28(6).]

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  • 收稿日期:2013-12-23
  • 最后修改日期:2015-12-01
  • 录用日期:2015-10-09
  • 在线发布日期: 2016-02-26
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