摘要
大跨度连廊结构一般固有频率较低、内部阻尼较小,在受到风力或人群同步激振时,容易激发共振而影响人行舒适度,严重时可能造成无法使用或破坏。采用调谐质量阻尼器(TMD),可有效地增加结构的系统阻尼,控制结构的振幅。该文通过重庆江北嘴金融城2号钢连廊TMD设计的工程案例,介绍了调谐质量阻尼器TMD的原理及其在大跨人行廊桥上的应用。
Large-span gallery structure usually has the features of low natural frequency and small internal damping and easily excites resonance to reduce pedestrian comfort and even cannot work out of destruction when under the pressure of wind force or crowd synchronous vibration.TMD adopted can effectively increases system damping so as to reduce the amplitude of the structure.Based on the case of No.2 steel gallery structure designed by TMD of Financial Center in Jiangbei district,Chongqing,the working principle of TMD and its application in large-span pedestrian bridge are introduced.
出处
《重庆建筑》
2012年第10期23-26,共4页
Chongqing Architecture
关键词
调谐质量阻尼器
减振
大跨度结构
tuned mass damper
anti-vibration
large-span structure
