基于能量原理的粘滞阻尼器附加阻尼系数分配方法研究

Research on additional damping coefficient distribution method of viscous damper based on energy theory

以线性粘滞阻尼器加固剪切型规则框架结构为研究对象,基于能量原理提出附加阻尼系数正比于层间位移平方的分配方式。以六层和十二层钢筋混凝土框架为例,以确保结构在中震时保持弹性状态为设计目标,分别采用附加阻尼系数正比于层间位移平方的分配方式以及现有的分配方式,对结构进行消能减震设计。计算结果表明:有控结构均满足中震不坏的要求,层间位移角限值均未超过1/550,减震效果良好;附加阻尼系数正比于层间位移平方的分配方式得出的总阻尼系数最小,为最经济的设计结果。

Based on the energy theory,the method in which the additional damping coefficient is proportional to the square of story drift is proposed for the linear viscous damper reinforced shear-type regular frame.Taking the six-story and twelve-story reinforced concrete frames as an example,both the the proposed method and the existing method are used to design the damped structures,making sure that the structures remain elastic under moderate-intensity earthquakes.The results show that the structures are free of damage under moderate-intensity earthquakes and their story drift angles are within 1/550.The proposed method produces the smaller damping coefficients,and therefore is more economical.