• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Wind & structures >Statistical characteristics of sustained wind environment for a long-span bridge based on long-term field measurement data
【24h】

Statistical characteristics of sustained wind environment for a long-span bridge based on long-term field measurement data

机译：基于长期实测数据的大跨度桥梁持续风环境统计特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The fluctuating wind induced vibration is one of the most important factors which has been taken into account in the design of long-span bridge due to the low stiffness and low natural frequency. Field measurement characteristics of sustained wind on structure site can provide accurate wind load parameters for wind field simulation and structural wind resistance design. As a suspension bridge with 1490 m main span, the Runyang Suspension Bridge (RSB) has high sensitivity to fluctuating wind. The simultaneous and continuously wind environment field measurement both in mid-span and on tower top is executed from 2005 up to now by the structural health monitoring system installed on this bridge. Based on the recorded data, the wind characteristic parameters, including mean wind speed, wind direction, the turbulence intensity, the gust factors, the turbulence integral length, power spectrum and spatial correlation, are analyzed in detail and the coherence functions of those parameters are evaluated using statistical method in this paper. The results indicate that, the turbulence component of sustain wind is larger than extremely strong winds although its mean wind speed is smaller; the correlation between turbulence parameters is obvious; the power spectrum is special and not accord with the Simiu spectrum and von Karman spectrum. Results obtained in this study can be used to evaluate the long term reliability of the Runyang Suspension Bridge and provide reference values for wind resistant design of other structures in this region.
机译：风振引起的波动是大跨度桥梁设计中考虑到的最重要因素之一，因为其低刚度和低固有频率。结构现场持续风的现场测量特性可以为风场模拟和结构抗风设计提供准确的风荷载参数。作为主跨为1490 m的悬​​索桥，润扬悬索桥（RSB）对风的波动具有很高的敏感性。从2005年到现在，通过安装在该桥上的结构健康监测系统，可以同时进行中跨和塔顶同时进行的连续风环境现场测量。基于记录的数据，详细分析了风特征参数，包括平均风速，风向，湍流强度，阵风因子，湍流积分长度，功率谱和空间相关性，这些参数的相干函数为本文采用统计方法进行评估。结果表明，尽管平均风速较小，但持续风的湍流成分比极强风大。湍流参数之间的相关性很明显；功率谱是特殊的，不符合Simiu谱和von Karman谱。本研究获得的结果可用于评估润扬悬索桥的长期可靠性，并为该地区其他结构的抗风设计提供参考值。

著录项

  • 来源
    《Wind & structures》 |2013年第1期|43-68|共26页
  • 作者

    Youliang Ding; Guangdong Zhou; Aiqun Li; Yang Deng;

  • 作者单位

    Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096, China;

    Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096, China;

    Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096, China;

    Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    long-span bridge; structural health monitoring; wind environment; field measurement; turbulence characteristics; power spectrum;

    机译：大跨度桥梁结构健康监测;风环境现场测量湍流特性;功率谱;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号