弹塑性连接梁在双薄壁高墩连续刚构桥中的应用

Application of Inelastic Beams on Double Thin-wall High Piers of Continuous Frigid Frame Bridge

针对罕遇地震中弹塑性杆件塑性变形而耗能的现象,探讨了在双薄壁高墩连续刚构桥中设置弹塑性连接梁的减震方案。分别计算了是否设置弹塑性连接梁的两个桥式,比较了在大震作用下墩柱的弯矩、剪力、位移变化情况。结果显示若设置连接梁,墩柱弯矩幅值在强震中下降幅度较大,剪力有所增加而位移幅值变化不明显。

For the phenomena of energy dissipation of inelastic beam under severe earthquake, the shock absorption project of setting inelastic beam in double thin-wall high piers of continuous frigid frame bridge is studied. Two bridge models with or not with inelastic beam are calculated separately, and the changes of moment, shear force and displacement are compared. The result is that if setting inelastic beam, the moment declines greatly, and shear force increases a little, and the displacement＇s maximum is unconspicuous for the pier.