超高层建筑抗风体型选取研究

Study on the Body Shape Selection of Super High-rise Building from the Point of Wind Resistance

为了研究超高层建筑体型选取时应注意的问题,分析总结了既有超高层建筑的体型特点,对其进行了归类,可将超高层建筑按体型特点大致以350m和600m为界分成3个级别.结合大量超高层建筑抗风设计实例及风洞试验结果,分析高宽比和长宽比对风致响应的影响.结果表明,明显弱轴的出现会显著降低结构效率,并结合工程实际对此给予了解释.对不同高度的超高层建筑体型设置给出了部分建议:当前抗风设计和研究应进一步考虑被分析对象在体型选取方面的现实性和合理性,应合理控制高宽比和长宽比以保证结构效率.

Wind effect of super high-rise buildings is closely related to its body shape,and the reasonable selection of the body shape is a prerequisite for the design or research of related wind-resistant work.In order to study the relationship between body shape and wind effect,the characteristics of existing super high-rise buildings were discussed firstly,by which a corresponding classification with separatrix of 350 m and 600 m was given.Then,the relationship between wind effect and aspect ratio,which may influence structural efficiency remarkably,was analyzed through several wind-resistant examples of high-rise buildings from the viewpoint of engineering practice and the basic theory of wind engineering.Finally,some preliminary proposals of body shape setting corresponding to buildings with different height,the aspect ratio and length-width ratio should be limited stringently to ensure the structure efficiency,and more considerations of rational building shape should be taken,were proposed.