新型横向钢阻尼装置用于斜拉桥的振动台试验研究

Shaking Table Test of Cable-stayed Bridge with New Lateral Steel Damping Device

为了探究新型横向钢阻尼装置的减震性能,以一斜拉桥为工程背景,对4组桥墩进行了振动台试验,研究了新型横向钢阻尼装置对斜拉桥的横向减震作用。结果表明:新型横向钢阻尼装置体系比横桥向固结体系1阶频率低;新型横向钢阻尼装置体系相对横桥向固结体系能有效地减小关键点的位移及加速度峰值,且随着地震动的增强,位移和加速度的减震效果更加明显,是一种合理的减震体系。

To research a new lateral steel damping device on seismic dissipation performance,a cable-stayed bridge was taken as background project.Shaking table test was carried out on four groups of piers to study the transverse seismic dissipation effect of new lateral steel damping device on the cable-stayed bridge.The results show that the primary frequency of new lateral steel damping system is lower than that of bridge transverse consolidation system.The new lateral steel damping system can reduce the peaks of key points of displacement and acceleration more effectively.With the increase of earthquake motion,the damping effect is more apparent.It is proof that the new lateral steel damping system is reasonable.