防风网对大跨气膜煤棚气动性能影响效应研究  

Effect of windbreak net on aerodynamic performance for long-span inflatable membrane coal shed

作　　者：周一航 刘庆宽 付赛飞[1] 郑云飞 陈娟 ZHOU Yi-hang;LIU Qing-kuan;FU Sai-fei;ZHENG Yun-fei;CHEN Juan(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Shijiazhuang Institute of Railway Technology,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学河北省风工程和风能利用工程技术创新中心,河北石家庄050043 [3]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,河北石家庄050043 [4]石家庄铁路职业技术学院,河北石家庄050043

出　　处：《空间结构》2023年第2期17-26,共10页Spatial Structures

基　　金：国家自然科学基金项目(51778381);河北省自然科学基金项目(E2018210044);河北省高端人才项目(冀办[2019]63号)。

摘　　要：为了明确防风网的布置形式对煤棚结构风荷载的影响,以某发电厂大跨气膜煤棚项目为工程背景,通过风洞试验研究了防风网透孔率为40%时在不同的高度和间距状态下对结构体型系数、脉动风荷载功率谱的影响,得到了不同遮挡效应下结构体型系数随风向角的变化规律.结果表明:在煤棚周围布置防风网后,结构表面体型系数绝对值有所减小;防风网高度相同时,结构体型系数随着布置间距增大而减小;防风网布置间距一定时,结构体型系数随高度增加呈减小趋势.布置防风网后结构表面测点的脉动风荷载功率谱峰值增大,谱峰宽度减小.风向角为90°时,防风网的遮挡效应最为显著,煤棚表面分区体型系数降低约65%.A wind tunnel experiment was carried out based on a long-span inflatable membrane coal shed to clarify the influence of the windbreak net layout on the wind load of the coal shed structure.The influence of windbreak net on structural shape coefficient and the power spectrum of fluctuating wind load was studied when the through-hole rate was 40%in the condition of different height and spacing,and the variation of structural shape coefficient with wind direction angle was obtained under different shielding effects.The analysis results indicated that the absolute value of the shape coefficient of the structure surface decreased after the windbreak net was arranged around the coal shed.When the height of the windbreak net was the same,the structural shape coefficient decreased with the increase of spacing.When the spacing of the windbreak net was constant,the structural shape coefficient decreased with the increase of height.The peak value of the fluctuating wind load power spectrum of the measuring points on the surface of the structure increased,and the peak width decreased after the windbreak net was arranged.When the wind direction angle was 90°,the shielding effect of the windbreak net was the most significant,which can reduce the surface partition shape coefficient of the coal shed by about 65%.

关 键 词：大跨煤棚 充气膜结构 防风网 风洞试验 气动性能 体型系数 

分 类 号：TU353[建筑科学—结构工程] TU312.1