复杂构形建筑物风荷载相互干扰研究

以北京中环世贸大厦四座塔楼的风荷载为例,通过风洞模拟实验研究了具有复杂构形的建筑物风荷载相互干扰问题.本文通过风洞模拟实验测得的建筑物表面平均风压分布,在三个典型风向角下,分析讨论了周围建筑物对中世大厦以及中世大厦四座塔楼之间的群体干扰.特别是展示了由于“夹道效应”所引起的建筑物表面局部风压分布大幅度增加的现象,分析讨论了其发生的原因和变化规律.对类似的复杂构形的建筑和结构风荷载设计具有参考价值.

Research on Interference of Wind Load on Complicated-Structured Buildings

Taking Beijing Zhonghuan World Trade Plaza,which is composed of four towers,as an example,the interference of wind loading on complicated-structured buildings was studied by means of wind tunnel simulation.On the basis of time-mean pressure distributions on the surface of buildings in three typical wind directions,the interference of wind loading between the four towers,as well as from the surrounding buildings was studied and analyzed.Particularly,it is shown that the phenomenon of the local wind pressure increased tremendously on the related surfaces of the buildings results from so called "channel-effect".The reasons of occurrence and rules are discussed and analyzed in the paper.It is worthful for reference to the wind loading design with similar buildings and structures.