复杂断面高层建筑的风致响应及其振动控制研究

(厦门大学建筑与土木工程学院,福建 厦门 361005)

复杂高层建筑; 风致响应; 振动控制; 优化设计

Wind-induced Response and Optimal Design of Vibration Control of Complex-shape High-rise Buildings
ZHANG Jianguo*,ZHUANG Jiakun,ZHUANG Huimin

(School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China)

DOI: 10.6043/j.issn.0438-0479.201704056

备注

复杂断面高层建筑在强风作用下,往往会产生较为明显的扭转响应,从而导致高层建筑顶部角点处的加速度值大大超过规范规定的限值.以弧形、平行四边形以及等边L形等3种断面的高层建筑为研究对象,计算了复杂断面高层建筑顶部角点处的风致加速度响应,进行了多个调频质量阻尼器(MTMD)减振系统的设计和优化研究.结果表明,在不使用MTMD进行风振控制时,3种断面高层建筑顶部角点处的加速度响应均超过限值,在合理布置MTMD并进行优化设计后,角点处的加速度响应可以得到有效抑制并取得较好的减振效果.

The obvious torsional response will be induced by strong wind on complex-shape high-rise buildings,which result in the fact that accelerations of top corner points on these buildings exceed the limit.Three complex-shape high-rise building models including arc-shape,parallelogram-shape and L-shape are tested in a wind tunnel to obtain the wind load on the surface.Accelerations of top corner points on these high-rise buildings are calculated on basis of the reasonable parameters of buildings.Moreover,multiple mass tuned dampers(MTMD)are designed to reduce the wind vibration.Results show that the acceleration responses of top corner points on complex-shape buildings are usually larger than limit values without MTMD system.In contrast,these acceleration responses will be reduced dramatically with the help of the optimal design of MTMD system.

·