北京某既有公共建筑的消能减震设计

Seismic energy dissipation design of an existing public building in Beijing

在北京某公共建筑的改造加固设计中,采用设置黏滞阻尼器及屈曲耗能支撑的消能减震设计以使结构满足现行抗震设防要求。运用盈建科结构软件(YJK)进行无控结构的振型分解反应谱法下的计算分析,以此得出的结构动力特性为基础,初步确定消能减震方案。运用SAUSAGE结构分析软件对附加黏滞阻尼器和屈曲耗能支撑的结构进行小震及大震下的时程分析及结构损伤评定,确定了消能减震结构的附加阻尼比,论证了黏滞阻尼器和屈曲约束支撑布置的有效性及结构抗震安全性。

In the strengthening design of an existing public building in Beijing,viscous dampers and buckling-restrained braces were settled in order to satisfy the current aseismic requirements.Initial energy dissipation plan was set up based on the dynamic characteristics of the uncontrolled structure which was reached by the mode decomposition response spectrum method with the structure analysis software YJK.Time history analysis and structural damage assessment of the structure installed with viscous dampers and buckling-restrained braces was executed by the nonlinear analysis software SAUSAGE,which was also determined the additional damping ratio of the energy dissipation structure.Thus,the effectiveness of the arrangement of the viscous dampers and buckling-restrained braces is demonstrated,and the seismic safety of the building is confirmed.