典型形体超高层建筑的风压风场与抗风优化研究

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摘要现代建筑的结构高度日益增加，高层建筑截面形式更加多样。近年来，我国出现了许多新型截面形式的超高层建筑，其风荷载的控制是结构风工程领域的研究重点。针对类矩形截面和圆形截面的超高层建筑，基于计算流体动力学方法和ANSYS/ FLUENT软件，数值模拟分析不同截面超高层建筑的表面风压分布规律，不同风向角下典型测点的平均风压系数，开展行人高度处风速的比较分析，研究超高层建筑抗风形体优化。结果表明，在超高层建筑转角处，因气流分离的不连续性而出现负风压最大值；风向角对切角矩形截面超高层建筑的风压分布影响显著，当截面切角正对来风方向时，其风压分布最不利；圆形截面超高层建筑负风压量值较小，且利于满足行人风安全性和风舒适性的要求，具有良好的抗风性能。

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	毛璐璐1
	韩兆龙1
	2
	周岱1
	2
	3
	包艳1
	汪汛1
	李煜1
	马晋1

关键词 ：超高层建筑, 计算流体动力学, 风压分布, 平均风压系数

Abstract：The height of modern architectures is increasing and the cross-section shape of high-rise buildings is becoming more diverse.In recent years, high-rise buildings with unconventional configurations have been constructed in China, which brings new challenges to wind engineering.Aiming at super high-rise buildings with rectangular-category and circular sections, based on the computational fluid dynamics (CFD) method and the ANSYS/FLUENT software, the wind pressure distribution and wind pressure coefficient at typical points of the super high-rise buildings with different section shapes were numerically simulated in different incoming wind directions to study the wind-resistant shape optimization of the super high-rise buildings.The results show that the maximum negative peak pressure occurs at the corner of super high-rise buildings due to the discoutinuity of the airflow separation at the corner edge.The super high-rise buildings with lacking-angle rectangular section have the most unfavorable wind pressure distribution when the incoming wind direction is directly facing the lacking-angle corner.The super high-rise buildings with circular section bear lower negative pressure, which is advantageous to wind-resistance ability.

Key words： super high-rise building Computational Fluid Dynamics wind pressure distribution wind pressure coefficient.

收稿日期: 2018-03-01 出版日期: 2019-09-15

引用本文:

毛璐璐1，韩兆龙1, 2，周岱1, 2, 3，包艳1，汪汛1，李煜1，马晋1. 典型形体超高层建筑的风压风场与抗风优化研究[J]. 振动与冲击, 2019, 38(18): 215-222.
MAO Lulu1, HAN Zhaolong1,2, ZHOU Dai1,2,3, BAO Yan1, LI Yu1, MA Jin1, MA Ning1. Wind pressure and wind-resistant shape optimization of typical super high-rise buildings. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(18): 215-222.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I18/215

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