新型抗风耗能装置在低矮房屋中布置方式的风洞试验研究
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TU352.2

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“十二五”国家科技支撑计划(2014BAL05B03);中央高校基本科研业务费(DUT19TD26)


Wind tunnel test study on the arrangement of wind-resistant energy-dissipation devices for low-rise buildings
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    摘要:

    针对低矮房屋受台风作用极易损坏的问题,提出一种在低矮房屋上安装新型抗风耗能装置的防护方法。为寻求新型耗能装置的最优布置方式,使耗能装置效用最大化,针对将装置安装在双坡屋盖边缘、屋脊以及联合导流板工作等6种安装工况,通过风洞试验,研究抗风装置系统对屋面峰值风压和平均风压的影响,并对6种工况进行数值模拟分析,数值模拟结果与风洞试验一致。进行了耗能装置几何参数的优化研究,探讨了叶尖速比、叶轮根部安装角和叶根对叶尖扭角对耗能系数的影响。研究表明:安装耗能装置能有效预防屋面受风损坏;在迎风侧屋檐上部,结合导流板与抗风装置联合工作的方式能显著降低负风压对屋面结构的不利影响,这种安装方式在任一风向角下都显著降低了屋面平均风压系数极值(包括迎、背风面),降低幅度可达40%。

    Abstract:

    Aiming at the problem that low-rise buildings are easily damaged by typhoons, this paper presents a protection method by installing a new type of wind-resistant energy-dissipation devices on low-rise buildings.To find the optimal arrangement of proposed devices and maximizing the utility of the devices, six cases with different installing schemes were analyzed in this paper, including to install the device on the edge of the double-slope roof, the roof ridge, and installed with spoiler.The influence of energy-dissipation devices system on peak wind pressure and average wind pressure of roof were studied by wind tunnel experiments.The numerical simulations of the 6 installation cases were carried out, and the simulation results are consistent with the wind tunnel test.The optimization on the geometric parameters of energy-dissipation devices was studied, and the influences of the tip speed ratio, blade root angle and blade to tip torsion angle on the energy-dissipation coefficients were studied.The results show that the installation of energy-dissipation devices can effectively prevent the roof damage from wind.In addition, by combining the spoiler and the energy-dissipation devices at the windward side of the eave, the adverse effects of wind suction on the roof structure can be significantly reduced.The aforementioned installation method can significantly reduce the extreme value of the average wind pressure coefficient of the roof (in both windward and leeward sides) at any wind direction angle and the reduction ratio is up to 40%.

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何锴,霍林生,李钢,李宏男.新型抗风耗能装置在低矮房屋中布置方式的风洞试验研究[J].土木与环境工程学报(中英文),2020,42(2):125-134. He Kai, Huo Linsheng, Li Gang, Li Hongnan. Wind tunnel test study on the arrangement of wind-resistant energy-dissipation devices for low-rise buildings[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2020,42(2):125-134.10.11835/j. issn.2096-6717.2019.169

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  • 收稿日期:2019-05-27
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  • 在线发布日期: 2020-04-28
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