黏滞阻尼器在不同高层结构体系的应用

Application of viscous dampers in different high-rise structures

随着我国高层建筑数量和高度不断增加,黏滞阻尼器被更多的用来抑制风荷载和地震作用下结构的动力响应。本文系统性分析9个实际应用工程,结构体系包括框架-剪力墙或剪力墙(3个)、框架-支撑核心筒(3个)、巨型框架(2个)和混合结构(1个),通过有限元软件分析,对安装黏滞阻尼器的结构采用时程分析法计算风荷载和地震作用响应,对比安装黏滞阻尼器前后结构的减振率,且分析不同结构体系无控剪切角和舒适度的计算。结果表明:黏滞阻尼器合理安装在不同高层结构体系中,能够有效抑制结构的顶层角点加速度和层间位移角,且达到舒适度的要求;黏滞阻尼器的布置位置可以参考楼层剪切角,在刚度较大的结构避难层(或加强层)通过套索(或阻尼器伸臂桁架)方式布置黏滞阻尼器,不仅能提高结构的耗能能力,还增加经济效益。

With the increasing number and height of high-rise buildings in China,the viscous dampers have be more used to suppress the dynamic response of the structure under the action of wind load and earthquake.This systematic analysis of nine practical application engineering,structure system including frame-shear wall or shear wall(3),frame-support core cylinder(3),giant frame(2)and mixed structure(1),through the finite element software analysis,for the calculation of the wind load and seismic response,compared with the installation before and after the damping rate,and analyzed the uncontrolled shear Angle and comfort of different structural systems.The results show that the viscous damper is properly installed in different high-rise structure systems,which can effectively suppress the acceleration and displacement angle of the structure and meet the comfort requirements.The viscous damper can refer to the floor shear Angle in the refuge layer(or reinforcing layer)through the toggle configuration(or damper arm truss),which can not only improve the energy consumption capacity of the structure,but also increase the economic benefit.