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研究了钢筋混凝土巨型框架多功能减振结构的减振原理 ,并对影响减振效果的因素进行了分析和研究。分析表明 ,隔震次框架的位置越靠近上部对主框架的减振效果越好 ,并且最优调谐比越小 ;随隔震层阻尼比的增大 ,主框架的减振系数减小 ,但隔震层阻尼比过大对主框架的减振效果不利 ;确定隔震次框架的最优频率变化范围是解决隔震次框架频率优化的合理方法。
The vibration reduction principle of the multi-functional vibration-damping structure of mega-frame reinforced concrete frame is studied, and the factors affecting the vibration damping effect are analyzed and studied. The analysis shows that the better the vibration isolation effect is, the smaller the optimal tuning ratio is. The damping ratio of the main frame decreases with the increase of the damping ratio, Isolation damping ratio is too large for the main frame of the anti-vibration effect of negative; to determine the optimal frequency range of sub-frame isolation is to solve the seismic isolation sub-frame frequency optimization reasonable method.