速度锁定装置在大跨度拱桥中的分析研究

Analysis and Research of Speed Lock-up Device on Large Span Arch Bridge

为了研究速度锁定装置在大跨度拱桥中的抗震性能,结合实际工程,建立了两个拱桥模型,其中一个拱桥模型设置有速度锁定装置,另一个未设置速度锁定装置。通过Midas civil软件,利用非线性时程分析方法对两个模型进行计算。结果表明,速度锁定装置可以很好地减小拱桥固定墩的剪力和弯矩,减小截面尺寸和配筋,同时可以利用活动墩共同抵抗地震作用。

To study the anti-seismic performance of speed lock-up device on large span arch bridge,the two computational models which are respectively uninstalled speed lock-up device and installed speed lock-up device on the arch bridge are established. Nonlinear time-history analyses are carried out by the Midas civil software in this paper. The results show that the speed lock-up device can effectively reduce the shear forces and the bending moments of the fixed pier,and decrease the sectional size and reinforcing steel bars. Meanwhile,the active piers are used to resist earthquake action.