+高级检索
低空封闭连廊的表面风压和整体体型系数
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Surface Wind Pressure and Overall Shape Coefficients of Low-elevation Enclosed Skybridge
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    采用刚性模型测压风洞试验研究低空封闭连廊的风压分布和整体体型系数,分析连廊4个表面测点的体型系数和非高斯分布特性,研究连廊整体体型系数随风向角和连廊长度的变化,给出低空封闭连廊的正迎风整体体型系数和角度风分配系数,基于极值分析方法给出连廊的全风向极值风压系数,最后给出连廊抗风设计的建议值.研究表明,低空封闭连廊在正吹情况下背风面的体型系数约为-1.04~-0.86,绝对值均大于规范中方柱的-0.6,导致连廊的整体体型系数大于规范中方柱的1.4,30 m长低空封闭连廊的整体阻力系数为1.61;正吹情况下连廊中间截面的整体体型系数大于其他截面,正吹风向角的整体体型系数大于其他风向角,连廊越长正迎风整体体型系数越大;在正吹情况下,连廊迎风面风压主要为高斯分布,其他表面主要为非高斯分布;给出正迎风整体体型系数和角度风分配系数以用于低空封闭连廊主体结构的抗风设计.

    Abstract:

    Wind tunnel testing is employed to study the wind pressure distribution and wind load on low-elevation enclosed skybridges. The characteristics of shape coefficients and non-Gaussian distributions on the four surfaces of the skybridges are analyzed. The overall shape coefficients of the skybridges concerning wind azimuths and skybridge length are investigated. Then, the windward overall shape coefficients and skewed wind loading distribution factors of low-elevation enclosed skybridges are provided. The peak wind pressure coefficients under all azimuths based on extreme value analysis are given. Finally, recommended values for the wind-resistant design of skybridges are suggested. Results show that the shape coefficients in the leeward side of a low-elevation enclosed skybridge range from -1.04 to -0.86, which are much larger than -0.6 in magnitude specified for the square tall building in the load code. As a result, the overall shape coefficient of the enclosed skybridge is 1.61, which is larger than the 1.4 specified for the square-high building in the load code. In the windward direction, the overall shape coefficient in the middle section is larger than that in the other section. The overall shape coefficient in the windward direction is larger than that in the other azimuths. The longer the skybridge length, the larger the overall shape coefficient. In the windward direction, the pressures on the windward surface present a Gaussian distribution, whereas those on the other three surfaces present a non-Gaussian distribution. The windward overall shape coefficients and skewed wind loading distribution factor are used as references for the main load-resistant design of the enclosed skybridges.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

SHEN Guohui?,HAN Kanghui, LIU Ruofei, YU Hangcong, LIN Wei.低空封闭连廊的表面风压和整体体型系数[J].湖南大学学报:自然科学版,2024,(5):123~131

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2024-05-30
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭