武汉鹦鹉洲长江大桥中塔墩防船撞装置研究

The main bridge of Yingwuzhou Changjiang River Bridge is a three-pylon steel-concrete composite girder suspension bridge with spans of 200, 2×850 and 200 m. a self-floating cylindrical anti-collision device made of composite materials is proposed, to reduce the risk of pier-vessel collision. To study the failure mode and anti-collision effect of the anti-collision device, four specimens of 1:8 scale were prepared, and the finite element software ANSYS was used to simulate the vessel-bridge collision process. The results show that under the quasi-static lateral compression, the inner walls of the anti-collision device delaminated, the external walls detached from the foam, and fibers in the inner and outer walls were broken. The longitudinal lattice webs delaminated and suffered from buckling damage, whereas reducing the spacing of lattice webs can improve the elastic ultimate load bearing capacity and initial stiffness of the structure. The anti-collision device can reduce the vessel collision force and prolong the time of collision. The deformation of vessel bow after collision significantly reduced and stresses dropped. The anti-collision device has good energy absorption performance, which can effectively reduce the dames of bridge and vessels during the bridge-vessel collision process.