墙体开洞及建筑间距对串列低矮建筑屋面易损区影响

发布时间：2018-02-13 18:31

本文关键词： 低矮建筑双坡屋面墙体开洞数值模拟易损区风压系数　出处：《湖南科技大学学报(自然科学版)》2016年04期 　论文类型：期刊论文

【摘要】：基于计算流体力学软件Fluent,采用RNG k-ε湍流模型研究了以墙体开洞面积和建筑距离为变量对两栋串列双坡低矮建筑屋面风压及屋面易损部位风压的影响规律.结果表明:施扰建筑屋面内风压受迎背风墙面开洞面积和两栋建筑间距离影响明显,在12 m建筑间距迎风墙面洞口面积为背风墙面的两倍时屋面平均内风压系数达1.41;开洞后内外风压共同作用使施扰建筑屋面净风压比封闭建筑外风压明显增大,各区域中背风屋脊区负风压最大,最大风压系数可达-2.34,平均负风压系数约-1.9,比封闭工况时增大了约90%.墙面开洞对受扰建筑屋面风压影响也较为明显.对群体开洞建筑风压的研究有利于了解群体建筑损毁机理,对沿海地区低矮建筑抗风有现实意义.
[Abstract]:Based on fluid, RNG k- 蔚 turbulence model is used to study the influence of wall opening area and building distance on roof wind pressure and roof vulnerable position of two double-slope low-rise buildings. Ming: the wind pressure in the roof of the intrusive building is obviously affected by the opening area of the leeward wall and the distance between the two buildings. When the opening area of the windward wall is twice as large as that of the leeward wall, the average internal wind pressure coefficient of the roof reaches 1.41, and the net wind pressure of the disturbed building roof increases obviously compared with the outside wind pressure of the closed building by the combined action of the inside and outside wind pressure after the opening of the hole. The negative wind pressure of leeward roof is the largest in all regions. The maximum wind pressure coefficient can reach -2.34, and the average negative wind pressure coefficient is about -1.9, which is about 90% higher than that under closed working conditions. The influence of wall opening on the wind pressure of disturbed building roof is also obvious. The study on wind pressure of group open-hole building is helpful to understand the damage mechanism of group building. It is of practical significance for the low buildings in coastal areas to resist wind.
【作者单位】：湖南科技大学土木工程学院;
【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)
【分类号】：TU312.1

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