粘滞阻尼墙在改造加固工程中的应用

APPLICATION OF VISCOUS FLUID DAMPING WALL IN RETROFIT AND REINFORCEMENT ENGINEERING

冀北电力调度通信楼附楼改造前,立面装修已施工完毕,外围结构框架构件无法加固,难于实施常规加固方式,通过多方案比较采用减震加固方案。在适当部位装设粘滞阻尼墙,通过阻尼墙提供较大的附加阻尼比消耗输入的地震能量,使原框架柱不需加固即可满足抗震要求。通过对结构进行反应谱分析和大震下弹塑性时程分析,确定阻尼墙布置方案和性能参数,对连接阻尼墙的框架子结构进行大震不屈服设计。通过分析加固后主体结构抗震性能得到提高,在地震作用下能满足规范抗震目标。

the reconstruction and reinforcement engineering of JiBei power dispatching communication center,exteriorfacade of building decoration had been finished. Peripheral frame is unable to take measures for reinforcing it. A conventional reinforcement measure is difficult to carry out. Through comparing multi scheme, we finally determined reinforcementscheme. According to the layout of the building wall, viscous fluid damping wall (VFW) is embedded in theoriginal frame. The VFW provides a larger damping ratio, and structurecan consume more seismic energy. On account ofusing the VFW, thecolumn satisfies the aseismic requirements without reinforcing. By structure responsespectrum andelastic丒plastictime-history analysis, the layout scheme and performance parameter of VFW are determined. Substructure with VFW has been unyielding analyzedon large earthquake. Results show thatthe seismic capacity of the structure is greatly improved after reinforcement.