新型摇摆隔震装置振动台试验研究

为解决塔型结构在地震作用下产生的变形问题,提出了一种新型摇摆隔震系统,该系统由竖向弹性支座和限位球铰组成。限位球铰安装在隔震层中,使结构在地震作用下产生摇摆运动。为验证该摇摆隔震系统的性能,运用摇摆隔震悬臂梁分析模型,对一钢柱模型进行了振动台试验研究,探究装有摇摆隔震装置的塔形结构对比传统结构的隔震效果。试验结果表明,摇摆隔震结构在顶部位移小幅度放大的情况下,顶部加速度的隔震率达到33.5%,且结构底部的应变减少率高达85%。证明该摇摆隔震系统不仅能有效隔离水平地震力作用,还能够控制结构产生的倾覆弯矩,减小上部结构动力响应,同时大幅度减少结构底部的应变,从而保护结构本身和内部设施不被破坏,提高了结构的安全性。

Shaking Table Test Research of a New Type of Rocking Isolator

In order to solve the deformation problem of the tower structure under the action of earthquake, a new type of rocking isolation system is proposed, which is composed of a vertical elastic support and a limit spherical hinge. The limiting spherical hinge is installed in the seismic isolation layer, which makes the structure produce rocking motion under the action of earthquake. In order to verify the performance of the rocking isolation system, using the rocking isolation cantilever beam analysis model, a steel column model was studied by shaking table test,and the isolation effect of the tower structure equipped with the rocking isolation device compared with the traditional structure was explored. The test results show that the seismic isolation rate of the top acceleration reaches 33.5%, and the strain reduction rate of the bottom of the structure is as high as 85% when the top displacement is slightly amplified. It is proved that the rocking isolation system can not only effectively isolate the horizontal seismic force, but also control the overturning moment generated by the structure, reduce the dynamic response of the upper structure, and greatly reduce the strain at the bottom of the structure,thereby protecting the structure itself and internal facilities from being damaged and improving the safety of the structure.