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通过对设置黏滞流体阻尼器的悬挂结构进行地震模拟振动台试验,分析了主结构与悬挂楼面的质量比、连接方式以及阻尼器分布对悬挂结构模型的频率、阻尼比和结构响应的影响。试验结果表明:与刚性杆连接的常规悬挂结构相比,采用阻尼器连接主结构和悬挂楼面,可改变结构频率,提高结构振型阻尼比,且模型前3阶振型主要表现为悬挂楼面剪切变形;悬挂减振结构主结构的位移峰值响应小于常规悬挂结构,略小于无连接的自由悬挂结构;当悬挂楼段质量较大时,减振效果更好;与自由悬挂结构相比,阻尼器连接的悬挂减振结构能较好地抑制悬挂楼面相对于主结构的位移和悬挂楼面的层间位移;当悬挂楼面侧向刚度较小时,阻尼器均匀布置比集中布置能更好地控制悬挂楼面的相对位移。
By simulating the shaking table of the suspension structure with viscous fluid damper, the influence of mass ratio, connection mode and damper distribution on the frequency, damping ratio and structure response of the suspension structure model was analyzed . The experimental results show that compared with the conventional suspension structure with rigid rods, the main structure and the suspension floor can be connected by the damper, the structure frequency can be changed and the damping ratio of the structure mode can be improved. The first three modes of the model mainly show as the suspension building The peak response of the main structure of the suspension vibration-damping structure is smaller than that of the conventional suspension structure, slightly less than that of the free-suspension structure without the connection; when the mass of the suspension section is large, the vibration damping effect is better; compared with the free suspension structure , The damped suspension suspension structure can restrain the displacement of the suspended floor relative to the main structure and the floor displacement of the suspended floor better; when the lateral stiffness of the suspended floor is small, the damper can be arranged more evenly than the centralized arrangement Good control of the relative displacement of the suspended floor.