【摘要】 颗粒阻尼器是广泛应用在机械工程和航空航天领域的有效的减振控制装置,但其在土木工程中的应用还处在起步阶段。通过三层钢框架附加颗粒阻尼器的振动台试验,考察了该装置对建筑结构的减震控制效果。试验研究表明:附加很小质量比(2.25%)的颗粒阻尼器能够减小主体结构的响应,尤其是均方根位移响应,但是其减震性能受到输入激励特性的影响,也和主体结构的振动幅度有关。颗粒阻尼器在颗粒流的运动形式下能够取得较好的控制效果。更多还原

【Abstract】 Particle dampers are efficient vibration control devices and are widely used in mechanical engineering and aerospace engineering;however,there are still limited applications in civil engineering.The vibration reduction effects of particle dampers were investigated by a series of shaking table tests of a three storey steel frame with such a device.It is shown that with small weight penalty(2.25%),particle damper system has good performance in reducing the seismic response,especially the r.m.s.displacement response.However,the reduction effects are influenced by the excitation characterization and the vibration amplitude of the primary structure.Slug flow motions lead to better vibration control effects.更多还原