防风网对大跨度煤棚风荷载特性的影响  

The Influence of Wind‑Proof Network on Wind Load Characteristics of Large‑Span Coal Shed

作　　者：付赛飞 贾娅娅 周一航 陈娟 郑云飞 刘庆宽 FU Saifei;JIA Yaya;ZHOU Yihang;CHEN Juan;ZHENG Yunfei;LIU Qingkuan(School of Civil Engineering,Shijiazhuang Tiedao University Shijiazhuang,050043,China;Department of Railway Engineering,Shijiazhuang Institute of Railway Technology Shijiazhuang,050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province Shijiazhuang,050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University Shijiazhuang,050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]石家庄铁路职业技术学院铁道工程系,石家庄050043 [3]河北省风工程和风能利用工程技术创新中心,石家庄050043 [4]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043

出　　处：《振动．测试与诊断》2024年第3期450-455,615,616,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(5177838);河北省自然科学基金资助项目(E2018210044,E2021210110);河北省高端人才资助项目(冀办[2019]63号)。

摘　　要：为了研究防风网对大跨煤棚风荷载的影响,通过风洞刚性模型测压试验,对3种透孔率的防风网下煤棚表面风荷载进行研究,分析了风向角、有无防风网和防风网透孔率对典型测点和分区的体型系数以及测点的脉动风荷载的功率谱特性的影响。结果表明:不同风向角下,结构体型系数极值出现的位置和范围差别较大;防风网对减小煤棚风荷载有较好效果,放置防风网后煤棚表面呈现为绝对值较小的负压;大部分风向角下,20%的透孔率防风网对减小风荷载效果更好;不同位置测点受来流脉动影响情况不同,煤棚迎风侧角部测点脉动风荷载无量纲功率谱数值较大,且功率谱成分复杂,放置防风网后其峰值明显减小。In order to study the influence of the windbreak on the wind load of the long-span coal shed,the wind load on the surface of the coal shed under the windbreak with three kinds of penetration rates is studied by the pressure measurement test of the rigid model in the wind tunnel.The influence of the wind direction angle,the presence of the windbreak and the penetration rate of the windbreak on the shape coefficient of the typical measuring points and the partition and the power spectrum characteristics of the fluctuating wind load of the measuring points are analyzed.The results show that the location and range of the extreme value of structural shape coefficient are quite different under different wind directions.The windproof net has a good effect on reducing the wind load of the coal shed,and the surface of the coal shed shows a negative pressure with a small absolute value after placing the windproof net.Under most wind direction angles,the wind-proof network with 20%porosity has better effect on reducing wind load.The measurement points at different positions are affected by the incoming flow pulsation differently.The dimensionless power spectrum value of fluctuating wind load at the angle of the windward side of the coal shed is large,and the power spectrum composition is complex.After the windbreak network is placed,the peak value is significantly reduced.

关 键 词：煤棚 风洞试验 防风网 分区体型系数 功率谱 

分 类 号：TU312.1[建筑科学—结构工程]