采用被动控制的四塔连体结构振动台试验研究

某四塔连体结构在顶部通过300m长的空中连廊在高度235m处连接，形成复杂的多塔楼高位连体结构。为减小地震作用下的结构响应及结构构件内力，采用被动控制方案，空中连廊与四栋塔楼的连接节点采用摩擦摆隔震支座，并设置阻尼器进行耗能与限位。为检验四塔连体高位减（隔）震结构的抗震性能，进行了1/25缩尺模型的模拟地震振动台试验研究。结果表明：采用被动消能减震的四塔连体结构满足抗震设计要求；摩擦摆隔震支座与黏滞阻尼器产生了良好的隔震与消能减震效果，空中连廊构件在罕遇地震作用下保持弹性工作状态。

Shaking table test of four-tower connected structure with passive control

A 235 meters high four-tower structure is inter-connected with 300 meters long sky corridor bridges on the top floor. To reduce the earthquake responses and member forces of the towers and sky corridor, passive control strategy was adopted. The connection between the towers and sky corridor were designed as flexible links, where friction pendulum bearings and viscous dampers were installed. To study the seismic performance of this complex structure, a 1/25 scaled model structure was tested on shaking table. Results show that the four-tower connected structure with passive control strategy can meet the seismic resistance design requirements. The friction pendulum and viscous damper perform very well for seismic isolation. The sky corridor elements still remain elastic state under the rare earthquake levels.