双圆形煤棚风荷载分布研究
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摘要
近年来,新建煤棚朝着大跨度、轻质量的方向快速发展,是一种风敏感结构,因此对其进行风荷载相关研究具有重要意义。该文以某新建圆形煤棚网架结构为研究对象,通过风洞试验的方法,研究了不同风向角下,在煤棚顶部、底部的风荷载体型系数的分布情况,并分析了两个临近的圆形煤棚之间的风荷载体型系数的相互影响。研究表明:在不同风向角下,煤棚顶部均承受负压。当两煤场之间的距离较近时,两煤棚上的风荷载体型系数相互影响显著。并且发现在两煤棚之间的区域,风荷载体型系数的绝对值相对较小。
Recent new coal sheds are developing rapidly in the direction of large span and light weight, which are a kind of wind-sensitive structure, so it is of great significance to study the wind load. In this paper, a new round coal-shed grid structure is studied. By the wind tunnel test method, the distributions of the wind load carrier type coefficients at the top and bottom of the coal shed under different wind angles are studied. The interaction of wind load carrier type coefficients between two adjacent circular coal sheds is analyzed. The results show that under different wind angles, the top of the coal roof is subjected to negative pressure. When the distance between the two coal fields is small, the wind-load carrier type coefficients of the two coal sheds have obvious influence on each other. It is found that the absolute value of the wind load carrier type coefficient is relatively small in the area between the two coal sheds.
Recent new coal sheds are developing rapidly in the direction of large span and light weight, which are a kind of wind-sensitive structure, so it is of great significance to study the wind load. In this paper, a new round coal-shed grid structure is studied. By the wind tunnel test method, the distributions of the wind load carrier type coefficients at the top and bottom of the coal shed under different wind angles are studied. The interaction of wind load carrier type coefficients between two adjacent circular coal sheds is analyzed. The results show that under different wind angles, the top of the coal roof is subjected to negative pressure. When the distance between the two coal fields is small, the wind-load carrier type coefficients of the two coal sheds have obvious influence on each other. It is found that the absolute value of the wind load carrier type coefficient is relatively small in the area between the two coal sheds.
引文
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[2]王旭,黄鹏,顾明.半球形屋面结构风荷载特性试验研究[J].中国工程机械学报,2009,7(3):351―355,378.Wang Xu,Huang Peng,Gu Ming.Experimental investigation on wind loadcharacteristics of hemispherical dome[J].Chinese Journal of Mechanical Engineering,2009,7(3):351―355,378.(in Chinese)
[3]米福生.干煤棚风致响应及干扰效应研究[D].上海:同济大学,2007.Mi Fusheng.Research on wind-induced response and interference effects on dry coal shed[D].Shanghai:Tongji University,2007.(in Chinese)
[4]齐月芹,刘灵灵.干煤棚结构风荷载风洞试验研究[J].工业建筑,2011,41(7):120―124.Qi Yueqin,Liu Linlin.Wind tunnel test study on wind load of dry coal shed structure[J].Industrial Building,2011,41(7):120―124.(in Chinese)
[5]Zhou X Y,Huang P,Gu M,et al.Wind loads andresponses of two neighboring dry coal sheds[J].Advances In Structural Engineering,2011,14(2):207―221
[6]王鑫.干煤棚表面风压与响应干扰效应分析[J].建筑结构,2016,46(增刊1):969―973.Wang Xin.Interference effect analysis of surface wind pressure and response of dry-coal shed[J].Building Structure,2016,46(Suppl 1):969―973.(in Chinese)
[7]叶孟洋,顾明,黄鹏.大跨度干煤棚结构表面体型系数试验研究[J].结构工程师,2007,13(2):62―66.Ye Mengyang,Gu Ming,Huang Peng.Experimental study on surface shape coefficient of large span drycoal shed[J].Structural Engineer,2007,13(2):62―66.(in Chinese)
[8]GB/50009―2012,建筑结构荷载规范[S].北京:中国建筑工业出版社,2012.GB/50009―2012,Load code for building structures[S].Beijing:China Construction Industry Press,2012.(in Chinese)
[9]李元齐,田村幸雄,沈祖炎.柱面壳体表面风压分布特性风洞试验研究[J].同济大学学报(自然科学版),2006,34(11):1457―1463.Li Yuanqi,Tamura Yukio,Shen Zuyan.Cylindrical shell surface wind tunnel tests of wind pressure distribution characteristics research[J].Journal of Tongji University(Natural Science Edition),2006,34(11):1457―1463.(in Chinese)
[10]刘庆宽.多功能大气边界层风洞设计与建设[J].实验流体力学,2011,25(3):66―70.Liu Qingkuan.Aerodynamic and structure design of multifunction boundary-layer wind tunnel[J].Journal of Experiments in Fluid Mechanics,2011,25(3):66―70.(in Chinese)