罩棚与低矮建筑表面风压相互干扰影响规律  

Mutual interference influence of surface wind pressure of canopy and low-rise building

作　　者：戴益民[1] 蒋荣正 高阳[1] 彭望 邹思敏[1] 刘也[1] Dai Yimin Jiang Rongzheng Gao Yang Peng Wang Zou Simin Liu Ye(School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2016年第3期51-57,共7页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金面上项目(51578237);广西防灾减灾与结构安全重点实验室开放课题(2013ZDK 06);湖南科技大学研究生创新基金项目(S140008)

摘　　要：采用Fluent RNG k-ε模型,以坡角为变量,研究低矮建筑对罩棚结构上下表面局部测点风压影响规律.结果表明,坡角变化对低矮建筑自身屋面风压影响明显,坡角为18.4°时,屋脊区域呈较大负压;当来流垂直于低矮建筑时,坡角变化对罩棚上表面迎风前沿风压影响不明显,但对靠低矮建筑与罩棚结合处影响明显,该区测点平均风压随屋面坡角增大而增大;由于气流受阻,罩棚下表面主要受到正压作用,在靠近低矮建筑和罩棚结合区域正压较大.A RNG k - 6 model, the Reynolds Averaged Navier-Stokes Equations （RANS） turbulence model ,was added in software Fluent 6.3 to simulate the surface wind pressure on canopy structure. The surface wind pressure on canopy structure influenced by roof pitch of adjacent low-rise building was studied. The results show that the roof pitch of low-rise building has large influence on its own roof wind pressure. The wind presents on ridge region appeared larger negative pressure when the roof pitch is 18.4°. When the wind direction is perpendicular to the ridge line, the roof pitch has less influence of pressure on the windward frontier of canopy structure and large influence on the juncture of low-rise building and canopy structure. The mean wind pressure increases with the increase of roof pitch. Due to airflow obstruction, the canopy lower surface is mainly subjected by positive pressure. The positive pressure is larger on the juncture of low-rise building and canopy structure.

关 键 词：罩棚结构 低矮建筑 坡角 风压 数值模拟 

分 类 号：TU312.1[建筑科学—结构工程]