| 摘要: |
| 基于Ansys FLUENT RNGκ-ε模型，通过利用日本东京工艺大学同体型比的四坡低矮房屋表面风压进行对比分析.结果表明：数值模拟与风洞试验结果基本吻合，验证了数值模拟方法的可行性；基于此模型对檐口长度及结构形式改变对屋面平均风压展开了研究，檐口长度的变化对屋面风压分布及大小的影响较为显著；屋檐角部位置结构发生变化直接影响屋面风压分布规律，切角可以起到降低屋面平均风压作用，此结论可以为沿海低矮房屋抗风及设计提供参考. |
| 关键词: 风工程 数值模拟 四坡屋面房屋 平均风压 |
| DOI： |
| 分类号:TM713 |
| 基金项目:交通运输部重大科技项目（2011318824140）；广西防灾减灾与结构安全重点实验室开放课题（2013ZDK06）；湖南省教育厅（13K088）；湖南科技大学项目（E51257，J11216） |
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| Numerical simulation of effects of cornice structure onwind pressure of low rise hip roofed buildings |
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Zou Simin, Dai Yimin, Jiang Rongzheng,Yan Xuguang, Lei Jingmin
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School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China
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| Abstract: |
| Based on Fluent and Re normalization group (RNG) κ ε model, according to a comparative analysis of low rise hip roofed buildings surface pressure on the Japanese Tokyo Polytechnic University with the same size ratio. Simulation results show that the numerical simulation and wind tunnel test results are basically consistent, the feasibility is revifed that of numerical simulation methods. Based on this model, the changing of the length of the cornice and roof structure on the average pressure is launched a study. Impact of changes in the length of the roof cornice pressure distribution and the size is of more significant, and roof eaves angle changes directly affect the distribution of pressure, cutaway roof eaves can reduce the average pressure, this conclusion can provide reference for coastal wind and low building design. |
| Key words: wind engineering numerical simulation hip roofed building mean wind pressure |
