封闭形式对大跨度煤棚风荷载影响研究  

STUDY ON THE INFLUENCE OF CLOSED FORM ON WIND LOAD OF LONG-SPAN COAL SHED

作　　者：孙一飞 张磊杰 刘庆宽 刘小兵 马文勇 SUN Yi-fei;ZHANG Lei-jie;LIU Qing-kuan;LIU Xiao-bing;MA Wen-yong(School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, 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]石家庄铁道大学风工程研究中心,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

出　　处：《工程力学》2019年第B06期234-239,共6页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51778381);河北省自然科学基金重点项目(E2018210044);河北省高等学校高层次人才项目(GCC2014046);石家庄铁道大学硕士研究生创新资助项目(YC2018022)

摘　　要：煤棚属于风敏感结构,为了控制工程安全,该文进行了风荷载研究。该文通过刚性模型测压试验,分析了风向角对典型测点和分块区域体型系数和极值风压系数的影响规律,研究了全封闭状态(两端山墙)和半封闭状态(只有一端山墙)对体型系数和极值风压系数的影响规律。研究表明:与全封闭状态相比,半封闭状态下,内压对风压分布的影响程度增大,并且当开口处于迎风区,内压为正值;当开口处于背风区,内压为负值,易引起主体风荷载在某些风向角范围内产生较大力矩,将导致分块区域的极值风荷载增大。A coal shed is a wind-sensitive structure for the sake of its characteristics of a long span,large flexibility and small damping.The study on wind load is of important engineering significance.In this paper,a rigid model manometry test was conducted to analyze the influence of the wind direction angle on the shape coefficients and the extreme wind pressure coefficients of typical measurement points and blocks.And the influences of the enclosed state(both ends of the gable)and the semi-closed state(one end gable)on shape coefficients and extreme wind pressure coefficients were studied.The results show that internal pressure will influence the wind pressure distribution more remarkably in a semi-closed state.And when the opening is in the windward area,the internal pressure is positive.when the opening is in the leeward zone,the internal pressure is negative,which easily causes a main wind load to generate a large torque in some wind direction angles,may resulting in the increase of a extreme wind load in the block area at the same time.

关 键 词：煤棚 全封闭状态 半封闭状态 体型系数 极值风压系数 

分 类 号：TU312.1[建筑科学—结构工程]