• 首页 | 期刊简介 | 编委会 | 投稿须知 | 出版道德规范 | 下载专区 | English
风屏障对分体式钢箱梁桥涡振性能影响风洞试验研究
Wind tunnel test study on effect of wind barrier on the vortex-induced vibration of twin steel box girder
投稿时间:2023-01-14  修订日期:2023-04-09
DOI:
中文关键词:  分体式钢箱梁  节段模型  涡激共振  风洞试验  风屏障
英文关键词:twin steel box girder  section model  vortex-induced vibration  wind tunnel test  wind barrier
基金项目:国家自然科学基金项目(52078210);湖南省杰出青年科学基金项目(2021JJ10003)
作者单位邮编
黄文俊 湖南科技大学 土木工程学院 411201
孙洪鑫 湖南科技大学 土木工程学院 411201
温 青* 湖南科技大学 土木工程学院 411201
黄 涛 湘潭城建集团有限公司 411204
杨向阳 湘潭城建集团有限公司 411204
摘要点击次数: 544
全文下载次数: 0
中文摘要:
      分体式钢箱梁颤振性能好,但涡振性能差,有效抑制分体式钢箱梁涡激振动是这类桥梁建设与运维必须解决的关键问题。以某在建大跨分体式钢箱梁斜拉桥为工程背景,通过节段模型风洞试验,获得了原设计断面的涡激振动性能,研究了护栏、中央透气格栅和风屏障等气动措施对主梁涡振性能的影响,提出了一种风屏障和中央透气格栅联合抑振的气动措施方案。研究结果表明:(1)封堵护栏不能有效改善主梁涡振性能,采用风屏障可明显降低主梁涡振振幅;(2)中央透气格栅可大幅抑制主梁涡激振动,但会出现两个涡振风速区间;(3)联合风屏障和中央透气格栅可基本抑制主梁涡激振动。研究成果可为类似分体式钢箱梁涡振抑制气动措施设计提供参考。
英文摘要:
      Twin steel box girder has good flutter performance, but poor vortex-induced vibration (VIV) performance. Effectively suppressing the VIV of twin steel box girder is a key issue that must be addressed in the construction and maintenance of such bridges. Taking a large-span twin steel box girder cable-stayed bridge under construction as the engineering background, the VIV performance of the original design section is obtained through section model wind tunnel tests. The effects of aerodynamic countermeasures such as guardrails, central breathable grilles, and wind barriers on the VIV performance of the main girder are studied, and a combined VIV suppression aerodynamic countermeasures scheme consisting of wind barriers and central breathable grilles is proposed. The research results show that: (1) sealing guardrails cannot effectively improve the VIV performance of the main girder, but using wind barriers can significantly reduce the VIV amplitude of the main girder; (2) the central breathable grille can greatly suppress the VIV of the main girder, but there will be two VIV wind speed ranges; (3) the combined use of wind barriers and central breathable grilles can effectively suppress the VIV of the main girder. The research findings can provide reference for the design of aerodynamic measures for suppressing VIV of similar twin steel box girder.
  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 65096187 位访问者,今日一共访问2080次,当前在线人数: 0
技术支持:本系统由北京勤云科技发展有限公司设计