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An experimental study on the wind pressure distribution of tapered super high‐rise buildings

机译：锥形超高层建筑风压分布的试验研究

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摘要

Studies on the effect of different shape strategies on wind-induced responses of super tall buildings have been extensive. However, little systematic research on the influence of aerodynamic shapes on wind pressure distributions of super high-rise building having a height more than 500m is reported in the literature. In this paper, a series of wind tunnel tests are conducted on models simulating tapered buildings taller than 500m with an aspect ratio of 9:1 by applying synchronous pressure measurement technology to investigate the influence of different shape strategies on the wind force coefficients of the cross section (C-s) and on the peak negative pressure distributions on surfaces. The shape strategies considered include tapering of the cross section of a building along its height, chamfered modification, and opening ventilation slots. It is found that the wind force coefficient C-s increase with an increase of the tapering ratio. It is shown that chamfered modification can effectively reduce most of the wind force coefficients C-s to less than 0.9. As for peak wind pressures, a zone having a higher negative pressure is found to locate at the bottom of the side faces of the model. With an increase of the tapering ratio, the peak negative pressure of side faces of the model slightly decreases. Chamfered modification can significantly increase the peak negative pressure at the chamfered location. Furthermore, it is demonstrated that opening ventilation slots had less effect on C-s, but the peak negative pressure can significantly increase at the area of opening ventilation slots and adjacent areas.
机译：对不同形状策略对超高层建筑风响应的影响的研究已经广泛。然而，关于空气动力学形状对高度超过500m的超高层建筑风压分布的影响的系统研究很少，文献报道。本文采用同步压力测量技术，在模拟长高比为9：1的500m以上的锥形建筑的模型上进行了一系列风洞试验，以研究不同形状策略对十字形风力系数的影响。截面（Cs）和表面上的负压峰值分布。考虑的形状策略包括使建筑物的横截面沿其高度逐渐变细，进行倒角修改并打开通风槽。可以发现，风速系数C-s随着锥度比的增加而增加。结果表明，倒角修改可以有效地将大多数风力系数C-s降低到0.9以下。对于峰值风压，发现具有较高负压的区域位于模型侧面的底部。随着锥度比的增加，模型侧面的峰值负压会略有下降。倒角的修改会大大增加倒角位置的峰值负压。此外，已证明打开通风槽对C-s的影响较小，但峰值负压会在打开通风槽的区域和邻近区域显着增加。

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  • 来源
    《Structural Design of Tall Buildings》 |2018年第13期|e1483.1-e1483.11|共11页
  • 作者

    Deng T.; Fu J. Y.; Xie Z. N.; Pi Y. L.; Shi B. Q.;

  • 作者单位

    Guangzhou Univ, Guangzhou Univ Tamkang Univ Joint Res Ctr Engn St, Guangzhou 510006, Guangdong, Peoples R China;

    Guangzhou Univ, Guangzhou Univ Tamkang Univ Joint Res Ctr Engn St, Guangzhou 510006, Guangdong, Peoples R China;

    South China Univ Technol, Sch Civil Engn & Transportat, State Key Lab Subtrop Bldg Sci, Guangzhou 510640, Guangdong, Peoples R China;

    Guangzhou Univ, Guangzhou Univ Tamkang Univ Joint Res Ctr Engn St, Guangzhou 510006, Guangdong, Peoples R China;

    South China Univ Technol, Sch Civil Engn & Transportat, State Key Lab Subtrop Bldg Sci, Guangzhou 510640, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    aerodynamic strategies; peak wind pressure coefficient; super tall building; wind force coefficient; wind tunnel test;

    机译：空气动力学策略峰值风压系数高层建筑风力系数风洞试验;

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