摘要
以某高速公路梁桥为对象,通过全桥动力非线性时程分析,对比了摩擦摆支座、板式支座和盆式支座的地震响应,探讨了摩擦摆支座对桥梁结构的减震性能。结果表明:相对于板式支座和盆式支座,摩擦摆支座的减震效果较好;设置摩擦摆支座能够大幅减小各活动墩支座的位移响应,极大程度上避免了主梁纵向碰撞和落梁等震害的发生;较板式支座和盆式支座,摩擦摆支座极大缓解了下部承受的地震力,可大幅度降低地震对桥梁下部结构的破坏,从而提高桥梁结构抗震能力。
Taking a girder bridge of an expressway as the object,through the dynamic nonlinear time history analysis of the full bridge,the seismic responses of friction pendulum bearings,plate bearings and basin bearings are compared,and the vibration damping effect of friction pendulum bearings on the bridge structure is discussed.The results show that the friction pendulum bearing has better damping effect than the plate bearing and basin bearing.The friction pendulum bearing can greatly reduce the displacement response of each movable pier bearing and avoid the main beam to a great extent.The occurrence of earthquake damage such as longitudinal collision and falling beams.Compared with slab bearings and basin bearings,friction pendulum bearings greatly alleviate the seismic force of the lower part,which can greatly reduce the damage to the lower structure of the bridge by the earthquake,thereby improving the seismic capacity of the structure.
作者
李哲
张光炜
LI Zhe;ZHANG Guangwei(Sichuan Institute of Building Research,Chengdu 610081,China)
出处
《四川建筑科学研究》
2021年第5期10-15,共6页
Sichuan Building Science
关键词
减隔震设计
摩擦摆支座
地震响应
减震率
anti-vibration design
friction pendulum support
seismic response
damping rate
