支撑刚度对高墩结构参激共振的影响

Effect of Support Stiffness on Parametrically Excited Vibration of High Pier Structure

现代超高墩桥梁的桥墩部分长细比越来越大,其稳定性问题显得尤为重要。通过将桩基的轴向抗压刚度转化为桥墩底端的弹性支撑,并参照以往桥梁取若干刚度数据进行数字试验,分析不同支撑刚度下高墩结构在基本参数共振和主参数共振时的动力响应问题,为桥墩设计提供参考。

The pier structure slenderness ratio of modern very high-pier bridge is being larger and lar-ger,so its stability is particularly important.This paper converted the boundary conditions of pier bottom to different support stiffness,applied some stiffness data reference to the bridge digital test, analyzed dynamic response of fundamental parametric resonance and principal parametric resonance and obtained some useful conclusions for pier design.