基于层间平均位移比的粘滞阻尼器布置方法

Viscous Damper Arrangement Method Based on Average Displacement Ratio Between Layers and Its Application

为提升粘滞阻尼器的减震效果,减少计算量,提出1种以各层间平均位移比为目标函数的粘滞阻尼器优化布置方法。即将各楼层在正负方向的最大层位移的平均值作为各层的层位移,以此计算各层的层间位移,通过各层间位移的比例来布置、分配粘滞阻尼器。不同布置方案下,案例结构中的粘滞阻尼器的响应对比结果表明,本文的布置方案在取得良好减震效果的同时,计算更为简便;相比于以层间位移比为目标函数的布置方法,采用本文的布置方法,结构的最大层间位移最大减震率、最大层间速度最大减震率、最大层间加速度最大减震率分别提高了1.09%、4.85%和4.41%。

A novel method of determining the number of viscous dampers per layer in a frame structure is proposed to enhance earthquake mitigation effect and reduce the amount of calculation.It is is an optimum approach taking the average displacement of the maximum layer displacement in the positive and negative directions as the layer displacement of each layer,and the ratio of the average displacement of each layer as an objective function.The inter-layer displacement of each layer is calculated,and damper number of viscous damping in each layer is determined on the basis of the ratio of relative displacement between the layers.The results of the responses compared show that the new method has better earthquake mitigation effect and simpler computation.Compared with the method of interlayer displacement ratio as objective function,the proposed approach has improved the maximum earthquake mitigation effect in interlayer displacement,velocity and acceleration by 1.09%,4.85%and 4.41%respectively.