摘要
用缩尺比为1:300的刚性模型对巨型高层开洞建筑进行了风洞测压试验,研究了C类场地、16个来流风向条件下,模型各表面(包括洞口内部)的风压分布特性等,并确定了结构总体风荷载及最不利风向角.结果表明:洞口的设置减小了建筑物所受的总体平均风荷载,但并非洞口越大减小风荷载越多.在建筑物上部开洞,对减小基础所受弯矩非常有利,而在中上部开洞则对减小总体平均风荷载更为有效,并且当风向与开洞方向平行时基础所受的总平均风荷载最小.风荷载沿建筑高度的变化并非按规范中的规律分布,而是中上部大、两端小.
Using rigid models with a geometrical scale of 1:300, the wind tunnel tests of mega buildings with opening are studied. The wind pressure distribution characters on every surface of models (including opening inside) are measured under the conditions of C type site and sixteen different wind incidences in wind tunnel. The total mean wind load and the most unfavorable wind incidence are determined. The results indicate that the opening reduces the total mean wind load on the whole building, but with the increasing of opening, wind load does not reduce more. The opening on the upside of the building is very favorable for decreasing moment on the base, however the middle opening is more valid for decreasing the total mean wind load. The smallest total mean wind load occurs when the wind is parallel with the opening direction. Wind load distribution along the height of the building is larger at the middle toward the upside and smaller at the two ends, which is different from the distribution rule in the load code.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2004年第11期1431-1434,1526,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助重大项目(59895410)
建设部1997攻关课题(97-07-01).
关键词
巨型开洞建筑
风洞试验
风压分布
Bending moments
Loads (forces)
Pressure distribution
Wind tunnels
