粘弹性阻尼器消能结构基于位移设计

Displacement-based Design for Energy Dissipation Systems With Visco-elastic Dampers

现有粘弹性阻尼结构设计方法比较繁琐,精度有限.根据粘弹性阻尼器阻尼系数和刚度的相关性,提出简单的迭代方法,基于结构顶点位移,直接确定所需粘弹性阻尼器的附加阻尼比,使粘弹性阻尼结构设计得到有效的简化.该方法适应于新建消能结构和准备用粘弹性阻尼器加固改造的已建结构,对其设计步骤分别进行了归纳.选用1栋5层的新建结构和1栋10层已建结构对该方法进行了验证.时程分析和振型Pushover分析(MPA)结果表明该方法在Pushover适用范围内可以取得满意的精度.

The existing design methods for passive energy dissipation systems with visco-elastie dampers are either complex or of biggish errors. This paper presents a displacement-based design method for energy dissipation systems with visco-elastic dampers. According to the correlativity between the damping coefficient of viseo-elastie dampers and their stiffness, the paper directly determines the expected supplemental damping ratio through simple iteration, thus simplifying the structure design of visco-elastic dampers. This method can be applied to new energy dissipation systems and seismic retrofitting of buildings. After the design steps are summed up, the presented method is applied to a 5-story new building and the seismic retrofitting of a 10-story building for verification. The results of time history analysis and mode Pushover analysis show that the method can help to achieve satisfactory accuracy within the range suitable for Pushover.