| 低矮房屋风致干扰效应研究 |
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| 引用本文： | 李永鑫,李钢,甘石.低矮房屋风致干扰效应研究[J].防灾减灾工程学报,2017(6):1023-1029. |
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| 作者姓名： | 李永鑫 李钢 甘石 |
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| 作者单位： | 大连理工大学建设工程学部， 辽宁 大连 116024 |
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| 基金项目： | 国家“十二五”科技支撑计划项目（2014BAL05B03）资助 |
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| 摘 要： | 采用计算流体动力学(Computational Fluid Dynamics,CFD)数值模拟方法,对低矮双坡屋面单体房屋屋面的局部风压进行了数值模拟,并将模拟结果同风洞试验结果做了对比,验证了数值模拟方法在模拟低矮双坡屋面房屋屋面风压方面的准确性和可靠性。此外研究了两栋同体型双坡屋面房屋的风致干扰效应,综合考虑了不同排列方式、布置间距以及风向角的影响。结果表明:该类房屋的迎风挑檐最易受风致干扰影响,且并列布置下干扰效应最为明显,错列布置次之,并列布置则较弱。为考虑放大的干扰影响,定量给出了房屋屋面风压增大部位的干扰系数,以供同类房屋抗风设计时采用。
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| 关 键 词： | 低矮双坡屋面房屋 数值模拟 干扰因子 屋面分区 平均风压 计算流体力学 |
| 收稿时间： | 2016/6/27 0:00:00 |
| 修稿时间： | 2017/2/19 0:00:00 |
Study on Wind-induced Mean Interference Effects between Low-rise Buildings |
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| LI Yongxin,LI Gang,GAN Shi.Study on Wind-induced Mean Interference Effects between Low-rise Buildings[J].Journal of Disaster Prevent and Mitigation Eng,2017(6):1023-1029. |
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| Authors: | LI Yongxin LI Gang GAN Shi |
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| Affiliation: | Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024 , China |
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| Abstract: | Numerical simulation method based on computational fluid dynamics theory, which is verified bycomparing wind pressure on low-rise gable roofed building of numerical simulation and wind tunnel test, is adopted in this paper to investigate interference effect between two such buildings considering various arrangement mode, arrangement distance and wind direction angle. Results show that there are most obvious wind-induced mean interference effects on cornice of interfered building fortwo same low-rise buildings. As for the arrangement of low-rise buildings, the tandem arrangement is largest, followed by staggered arrangement and less is parallel arrangement. Eventually, interference coefficients of wind load shape coefficient on the roof of low-rise gable roofed building in different arrangements are given to use for wind-resistant design of such buildings. |
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