基于减震控制目标的黏滞消能设计实用方法

Practical design method for damping structure with viscous dampers based on vibration control objectives

提出了一种黏滞流体消能器减震设计的实用设计方法:即由设定的性能目标确定地震作用的降低程度,再确定原结构所需要的消能器附加有限阻尼比,再根据消能器耗散的能量与消能结构的总应变能两者的比值,估算出结构所需消能器的数量,最后进行消能器的优化设计。采用本文实用设计方法对一栋框架-剪力墙结构进行消能器布置。对该减震结构在多遇地震和罕遇地震作用下的减震效果分析表明,利用本文实用方法得到的消能器布置达到了预期减震效果。本文实用方法简便准确,是快速估算黏滞流体消能器数量和选择消能器优化参数的有效方法。

A practical design method for energy dissipation with viscous dampers was put forward. It is based on performance objective and the earthquake action reduction, the value of needed additional effective damping ratio can be obtained on the primary structure, then according to the ratio value of the dissipating energy by the dampers to the total strain energy of the dissipated structure, the needed damper quantity can be estimated. Finally, the optimal design of damper was conducted. The damper is disposed in a frame-shear wall structure based this practical design method. The damping effect analysis results under frequent earthquate and rare frequent show that the practical method is simple, effective, and can be used to reach anticipated damping quickly. The method put forward here is simple and accurate. So it is an effective practical method for designer to estimate the number of viscous damper and choose damper and optimize parameters quickly.