粘滞阻尼器被动消能体系基于位移设计方法

针对新建粘滞阻尼器被动消能体系和已建结构采用粘滞阻尼器进行加固,其现有设计方法需要多次试算、十分繁琐的情况,将结构等效为SDOF体系,基于目标位移可以很方便地求出所需粘滞阻尼器的附加阻尼比,选择合理的分布模式即可计算出结构各层安装阻尼器的数量。采用1栋5层的新建结构和1栋10层已建结构验证该方法。时程分析和振型Pushover分析结果表明,采用该方法在Pushover适用范围内可以取得较高的精度。

Displacement-based design for passive energy dissipation systems added viscous dampers

The general design methods for passive energy dissipation systems with viscous dampers,such as seismic retrofitting of buildings and seismic regulation of new building,a lot of pilot calculations must be required and its process is very complex.When a MDOF structure is transformed in an equivalent SDOF system,supplemental damping ratio based on the target displacement can be solved conveniently.When reasonable dampers distribution patterns are given,the quantity of dampers fixed in each storey will be gained.The procedure was applied to 5-storey new building and 10-storey seismic retrofitting of building for verification.According to the earthquake time history analysis and mode pushover analysis results,higher accuracy can be achieved for structure in which the pushover analysis can be applied.