消能支撑方钢管混凝土高层建筑抗震设计

Aseismic Design of Tall Building of Concrete Filled Square Steel Tube with Energy Dissipation Braces

对于国内首个平立面不规则并设置粘滞流体阻尼器的复杂方钢管混凝土高层建筑,首先采用框架支撑体系有效解决了扭转效应,然后讨论了阻尼器的选型、布置位置和数量.采用ETABS软件建模,由大量对比计算确定了阻尼器的设计参数.通过不同加速度峰值和不同地震波作用下的时程分析,获得了结构从小震到大震下的位移、层剪力等动力响应.与无控结构相比,得到了粘滞阻尼器的耗能减震效果,总结评价了结构的整体抗震性能,给出了设计建议.最后与振动台试验结果作对比.相关研究结论可为今后类似工程设计提供参考.

For a complex tall building of concrete filled square steel tube （CFST） with irregularities of plan and elevation, viscous dampers set, the torsion effect was deduced by adopting braced-frame system. Then the type, location and quantity of its dampers were discussed. The structural model was established by adopting ETABS software and these dampers＇ design parameters were determined accord- ing to contrastive computation. With time-history analysis of different acceleration peak value and different seismic wave, the dynamic responses of displacement, and internal force etc. caused by small or strong earthquake action were obtained. In contrast to the uncontrolled structure, the energy dissipation effects were investigated. Then the whole building＇ s aseismic performance was summarized, and design suggestions were given. In the end, the results of shaking table test were alto given as a comparison. Relative study conclusions can provide a basis for designing other similar projects.