摘要
分别介绍了三种减隔震装置的工作原理,并结合一个工程实例对减隔震装置在大跨度连续梁桥中的应用进行了探讨,对这三种减隔震装置的减震效果进行了分析。分析结果表明,将固定盆式支座换成摩擦摆支座,并在活动墩上采用粘滞阻尼器或Lock-up装置,能够在可控墩梁相对位移下有效减小固定墩所承受的地震力,改善结构的抗震性能。
The application of seismic isolation devices in a long-span continuous bridge was discussed while the principle of three isolation devices was introduced. Finally, the effectivity of the three isolation devices was separately illustrated in a bridge project. The analysis shows that, if fixed bearings are replaced by friction pendulum bearings and viscous damper or lock-up device is applied in parallel on non-fixed piers, the earthquake forces on piers can be reduced effectively with acceptable relative displacement between superstrurtures and piers and also the seismic performance of the bridge can be improved.
出处
《结构工程师》
2009年第4期102-107,共6页
Structural Engineers
关键词
减隔震装置
大跨度连续梁桥
抗震性能
seismic isolation device
long-span continuous bridge
seismic performance
