论文部分内容阅读
采用阻尼杆件替代双层网壳结构中的部分下弦杆件,既不改变原结构的网格形式,又对其进行有效的减振控制。在ANSYS软件中建立粘弹性阻尼杆件的数值模型,采用阻尼杆件对网壳部分下弦杆件进行替换,建立网壳减振结构数值模型;分别采用8种阻尼杆件替换方式对结构进行控制,进行结构的三维地震作用分析,在三种常用II类场地地震作用下考察替换杆件布局对结构控制效果的影响。研究表明:阻尼杆件布局方式对结构动力响应的控制效果有较大影响,合理布置阻尼替换杆件可以有效降低结构最大节点位移、最大节点加速度、最大杆件轴力等响应,控制效果可以达到20%～30%。
The use of damping bars to replace some of the lower chord members in the double-layer reticulated shell structure can not only change the grid structure of the original structure but also provide effective damping control. The numerical model of viscoelastic damping bar is established in ANSYS software. The damping chord is used to replace the lower chord part of the shell, and the numerical model of the reticulated vibration damping structure is established. Eight types of damping bar are used to control the structure , The structure of the three-dimensional seismic action analysis, three kinds of common site II under the action of the earthquake to examine the layout of the replacement rod effect on structural control. The results show that the damping bar layout has a great influence on the control effect of the structure dynamic response. The rational arrangement of the damping bars can effectively reduce the maximum node displacement, the maximum node acceleration, the maximum axial force of the bar, and the control effect can be achieved 20% ~ 30%.