高层建筑风帆型塔冠的风荷载特征研究

樊启广; 余世策; 沈汉栋; 周建强

doi:10.3724/j.gyjzG23092503

高层建筑风帆型塔冠的风荷载特征研究

doi: 10.3724/j.gyjzG23092503

1. 浙江大学建筑设计研究院有限公司, 杭州 310028;
2. 浙江大学建筑工程学院, 杭州 310058;
3. 精工绿筑科技集团有限公司, 浙江绍兴 312065

详细信息

作者简介:
樊启广,高级工程师,一级注册结构工程师,从事复杂建筑结构设计研究,40620058@qq.com。

通讯作者:
余世策,博士,研究员,从事结构风工程研究,yusc@zju.edu.cn。

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出版历程
- 收稿日期: 2023-09-25
- 网络出版日期: 2024-11-06

Research on Wind Load Characteristics of High-Rise Building Sail-Shaped Tower Crown

1. The Architectural Design & Research Institute of Zhejang University Co., Ltd., Hangzhou 310028, China;
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
3. Jinggong Green Building Technology Group Co. Ltd., Shaoxing 312065, China

摘要

摘要: 采用风洞试验研究高层建筑风帆型塔冠的风荷载,给出典型风向下风帆型塔冠的平均风压和脉动风压分布特征,以及主要分区体型系数随风向角的变化;采用极值分析方法得到风帆型塔冠的极值净风压分布,并探讨了典型风向下塔冠风荷载谱特征。研究表明:风帆型塔冠三面合围形成半开放的腔体,其内侧风压分布比较均匀;风帆开口迎风时,形成显著的兜风效应,但由于高层建筑顶部气流向上流出,风帆开口迎风的净风体型系数仅为1.09;由于气流分离使塔冠两侧翼边缘产生强大的风吸力和压力脉动,局部净风压极值较大;风帆型塔冠特殊的外形使得风帆开口迎风或背风时的横风向涡脱落强度要明显弱于侧翼迎风时的横风向涡脱落强度。
- 风帆型塔冠 /
- 风压 /
- 体型系数 /
- 兜风效应 /
- 气动力频谱
Abstract: Wind tunnel tests were used to study the wind load of high-rise building sail-shaped tower crown. The distribution characteristics of average wind pressure and fluctuating wind pressure of sail-shaped tower crown under typical wind direction were obtained, as well as the variation of shape coefficient of each face with wind direction. The extreme value analysis method was used to obtain the extreme net wind pressure distribution of sail-shaped tower crown. The wind load spectrum characteristics of tower crown under typical wind direction were discussed and compared with the middle of tower body.The results showed that a semi-open cavity was formed by three sides of the sail-shaped tower crown, and the distribution of wind pressure inside was relatively uniform. When the sail opening was facing the wind, a significant wind-catching effect was formed. However, the net wind shape coefficient of the sails open to the wind was only 1.09 because of the upward flow from the top of the high-rise building. Due to the separation of air flow, strong wind suction and pressure pulsation were generated on the two edges of the tower crown, and the local net wind pressure extreme value was large. The special shape of the sail-shaped tower crown made the intensity of the cross wind vortex shedding when the sail opening was windward or leeward was obviously weaker than that when the flank was windward.
- sail-shaped tower crown /
- wind pressure /
- shape coefficient /
- wind-catching effect /
- aerodynamic spectrum

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参考文献(10)

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