钢-UHPC组合式防撞浮箱防撞性能研究

Research on the Anti-collision Performance of Steel-UHPC Combined Anti-collision Floating Box

由于钢-橡胶组合式防撞浮箱被小型船舶撞击后防腐涂层易被破坏,引起箱体进水、防撞装置下沉等问题,因此多采用新型的钢-UHPC组合式防撞浮箱。为了解钢-UHPC组合式防撞浮箱防撞性能,采用数值模拟的方法,从船舶撞击速度以及角度2个方面探究钢-UHPC组合式防撞浮箱对削减桥墩受到撞击力的影响。结果表明:1)钢-UHPC组合式防撞装置具有良好的削减撞击力的能力,大约在30%~40%;2)该防撞装置对撞击力的削减在正撞下随速度增加而增强,在20°斜撞下随速度增加而减弱,但都能达到30%以上;3)大角度撞击下防撞装置对撞击力的削减效果十分明显,主要是由于该装置具有较好拨转船头效果。钢-UHPC组合式防撞浮箱在实际应用中具备良好的防撞性能,可起到保护桥墩、防止桥墩破坏的作用。

The steel-rubber combined collision avoidance device is easy to be destroyed after being hit by small ships,causing problems such as water intake of the device and sinking of the device,and the steel-UHPC combined anti-collision floating box is mostly used.In order to study the anti-collision performance of steel-UHPC combined anti-collision floating box,numerical simulation is used to investigate the effect of steel-UHPC combined anti-collision floating box on reducing the impact force on bridge piers from two aspects:ship impact velocity and angle.The results show that:1)The steel-UHPC combined anti-collision floating box has a good ability to reduce the impact force,which is about 30%to 40%;2)The reduction of the impact force of the anti-collision device increases with the increase of speed under forward impact and decreases with the increase of speed under 20°oblique impact,but all of which can reach more than 30 percent;3)The anti-collision device has obvious effect on reducing the impact force under large angle impact,because the device has a good effect of turning the bow.The research shows that steel-UHPC combined anti-collision floating box has good anti-collision performance in practical application,