摘要
为研究阻尼系数对偏心与放大式混合方案减震效果的影响,采用有限元软件ETABS建模,通过结构顶点位移、附加阻尼比、楼层位移、楼层剪力、楼层加速度等指标,进行了阻尼系数的参数分析。经计算发现,随着阻尼系数的增加,阻尼器的动刚度增加,结构周期变短;由于阻尼比和动刚度的共同影响,位移和剪力的减震效果均呈现先增加后减小的趋势,但位移减震率优于剪力和加速度的减震率,当阻尼系数较小时,加速度减震率为正,否则反之,结构设计时应考虑粘滞阻尼器动刚度对结构响应的影响。
In order to study the influence of damping coefficient on eccentric and amplified hybrid damper system,,the finite element software ETABS was used to model,and the damping coefficient was analyzed by the structure vertex displacement,additional damping ratio,floor displacement,floor shear,floor acceleration and other indicators.It is found that with the increase of damping coefficient,the dynamic stiffness of damper increases and the structural period becomes shorter;Due to the joint influence of damping ratio and dynamic stiffness,the damping effect of displacement and shear force increases first and then decreases,but the displacement damping rate is better than the shear damping rate.When the damping coefficient is small,the acceleration damping rate is positive,otherwise,on the contrary,the influence of dynamic stiffness of viscous damper on structural response should be considered in structural design.
出处
《福建建设科技》
2022年第2期23-26,共4页
Fujian Construction Science & Technology
基金
福建省住房和城乡建设厅科技开发研究项目(2022)。
关键词
偏心放大式减震
阻尼系数
加速度
减震率
Eccentric amplification damping
Damping coefficient
Acceleration
Damping rate
