采用颗粒调谐质量阻尼器的钢框架结构振动台试验研究

通过附加和不附加颗粒调谐质量阻尼器的5层钢框架振动台试验,研究其在实际地震波以及上海人工波激励下的减震效果。通过调整不同悬挂长度（频率比）、质量比、颗粒到阻尼器壁净距等参数,分析阻尼器参数对其减震效果的影响。试验结果表明：不同地震作用下该类阻尼器均能达到较好的减震效果,其中上海人工波的减震效果最好;对于多层钢框架结构,阻尼器能够有效控制第1振型的振动,但是对于高阶振型的控制作用无法保证;当阻尼器频率与主体结构基频相同时,能够达到最优减震效果,而当二者频率不同时,依然有一定的减震效果,说明其具有一定的鲁棒性;在合适的质量比（0.66%）下,阻尼器能够达到最佳减震效果;当颗粒到容器内壁净距为1.6D~3.6D时,可使阻尼器响应最小,且减震效果较好。

Shaking table test of steel frame structure with particle tuned mass damper

Shaking table tests of a five-story steel frame with/without particle tuned mass dampers were carried out to study the damping effect under the actual seismic wave and Shanghai artificial wave excitation. The influence of dampers parameters on the damping effect was analyzed by adjusting the parameters of different suspension length (frequency ratio), mass ratio, and gap clearance from particle to the container wall. Experimental results show that the new dampers can achieve good damping effect under different earthquake action, especially under Shanghai artificial wave; for multi-story steel frame structure, it can effectively control the first mode of vibration, but the control effect for higher modes is variable; the new dampers can achieve optimal damping effect when the frequency of the damper is the same as the fundamental frequency of the main structure, and can still have certain effects when the frequency of the damper is not the same as the fundamental frequency of the main structure, indicating its robustness; with a suitable mass ratio (0.66%), particle tuned mass damper can achieve the best damping effect; when the gap clearance between the particle and the container is 1.6D~3.6D, the damper can achieve the best damping effect while keep small damper response.