为明确调频型颗粒阻尼器（Tuned Particle Damper，TPD）减震效果的关键影响因素和附加微细耗能颗粒对土木工程领域用调频型颗粒阻尼器减震效果的影响，以某钢筋混凝土框架结构为原型，设计制作了1:30的缩尺试验模型及可用于该试验模型的调频型颗粒阻尼器，基于选定的TPD参数，通过在阻尼器腔体中附加不同质量的微细耗能铁粉颗粒，利用振动台试验对附加微细耗能颗粒前后调频型颗粒阻尼器减震效果的变化进行了研究。结果表明：依据本文设计的TPD附加微细耗能颗粒后仍能较有效降低结构在地震作用下的位移响应；激励强度是影响其控制效果的关键因素，随着激励强度的增加，附加微细耗能颗粒TPD的控制效果趋于提高；附加微细耗能颗粒后TPD的减震效果略有降低，土木工程领域颗粒与腔体间相对运动提供的调谐作用是影响TPD减震效果的重要因素。
Abstract
In order to clear the key factors that affect the damping effects of tuned particle damper (TPD) and study the influence of the fine energy dissipative particles on the damping effects of tuned particle damper used in civil engineering, a 1/30-scale test model was designed and manufactured based on a reinforced concrete frame, and a tuned particle damper which can be used to reduce the vibration of the scaled model was designed. Based on the selected parameters of TPD, by adding different amounts of fine steel powders in the damper cavity, the variation of the damping effects of TPDs with and without fine particles were studied through shaking table tests. The results show that TPD with fine particles can decrease structural displacement response effectively under earthquake action. Excitation intensity is a critical factor influencing the control effect, the control effect increase with an increase in excitation intensity. The control effect of the TPD with fine steel powders tends to decrease compared with traditional TPDs without fine particles, tuning effect caused by the relative motion of particles is the main damping mechanism of TPDs in civil engineering.
关键词
框架结构 /
调频型颗粒阻尼器 /
振动台试验 /
微细颗粒
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Key words
frame structure /
tuned particle damper /
shaking table test /
fine particle
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