摘要
建立了桩基础高墩摇摆隔震的分布Winkler弹簧模型,与振动台试验结果的比较表明,分布Winkler弹簧模型可以较好地模拟桥墩的摇摆隔震。基于分布Winkler弹簧模型,提出了桩基础高墩摇摆隔震的两弹簧分析模型及提离弹簧刚度的取值方法。基于某铁路高墩桥梁进行了分布Winkler弹簧模型、两弹簧模型及转动弹簧模型的比较。结果表明,两弹簧模型的时程曲线与分布Winkler弹簧模型吻合较好,两弹簧模型得到的墩顶峰值位移及墩底峰值弯矩大于分布Winkler弹簧模型,而转动弹簧模型的结果则小于分布Winkler弹簧模型。
The distributed Winkler spring model was established for rocking isolation of tall piers with pile foundations. The results of the distributed Winkler spring model proved good by comparison with the results of shaking table tests. On the basis of the distributed Winkler spring model, the two-spring model for analysis on tall piers with controlled rocking devices and the sampling method for uplifting spring stiffness were put for- ward. By example of a tall-pier railway bridge, the distributed Winkler spring model, the two-spring model and the rotational spring model were compared. The results show as follows： The time history curves of the two-spring model are in good agreement with the distributed Winkler spring model; the peak displacement at pier top and peak moment at pier base calculated with the two-spring model are greater than the distributed Winkler spring model; the peak displacement at pier top and peak moment at pier base calculated with the rota- tional spring model are smaller than the distributed Winkler spring model.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2013年第11期86-91,共6页
Journal of the China Railway Society
基金
国家自然科学基金(51268027
51368033)
关键词
高墩
桩基础
摇摆隔震
分析模型
提离
tall pier
pile foundation
rocking isolation
analytical model
up-lift
