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以陕西省五里坡特大桥为例,探讨了大跨连续刚构桥中设置阻尼器和隔震铅芯橡胶支座的减震方案。分别计算了是否设置阻尼器和隔震铅芯橡胶支座的两个桥式,比较了在大震作用下墩柱的弯矩、剪力、位移变化的情况。结果显示若设置了阻尼器和隔震铅芯橡胶支座,墩柱弯矩幅值在强震中下降幅度较大,剪力和位移的幅值也得到了下降。
Taking Wulitott Bridge in Shaanxi Province as an example, the damping scheme of dampers and isolated lead rubber bearings in large span continuous rigid frame bridge is discussed. The two bridges of the damper and the isolated lead rubber bearings are respectively calculated, and the bending moments, shear forces and displacements of the pier under earthquake action are compared. The results show that if the dampers and shock-absorbing lead-rubber bearings are set, the bending moment amplitude of the pier decreases sharply in strong earthquakes and the amplitude of shear and displacement also decreases.