中文摘要：

为研究船舶与大跨度斜拉桥碰撞过程中桥梁撞击位置的受损状况及结构响应,以安徽省望东长江公路大桥为背景,采用非线性动力分析有限元软件LS-DYNA进行数值仿真分析。结合桥址处的水文、地质条件,综合考虑斜拉索拉力、桥面刚度、土对桩的约束和全桥结构自重等因素,建立船桥碰撞的整船整桥计算模型,分析在16.5m高水位时,10 000t的大型船舶分别以正撞击和偏45°斜撞击大桥的撞击过程。结果表明：船舶撞击力随船艏阻抗系数的增大而增大;撞击力随撞击角度变化,在最不利工况下,正撞击的撞击力峰值高出偏45°撞击力峰值的1倍多;船艏与桥塔的损伤随撞击角度变化;桥塔整体刚度足够大,但船艏对桥塔表面混凝土造成严重破坏,影响桥塔整体结构的正常使用和耐久性。

英文摘要：

To investigate the damaged state and structural responses of the collided part of long span cable‐stayed bridge in the colliding process of the vessel and the bridge , the Wangdong Changjiang River Highway Bridge in Anhui Province was taken as an example and the nonlinear dynamic analysis finite element software LS‐DYNA was used to implement the numerical simula‐tion analysis .With reference to the hydrological and geological conditions at the bridge site and in comprehensive consideration of the stay cable tension ,deck stiffness ,restraint of the soil to the piles and the structural self weight of the whole bridge ,the calculation model of the whole vessel and bridge for the vessel and bridge colliding w as created and the process w hen the 10 000 t large vessel collided with the bridge respectively head‐on and obliquely at an angle of 45° at the 16 .5 m high water level was analyzed .The results of the analysis show that the colliding force of the ves‐sel increases with the increase of the resistance coefficient of the vessel bow and the colliding force changes with the changing of the colliding angles .Under the worst load case ,the colliding force peak value of the head‐on colliding is one more times higher than that of the obliquely colliding at the angle of 45° .The damage to the vessel bow and pylon changes with the changing of the colli‐ding angles .The integral stiffness of the pylon of the bridge is great enough ,however ,the colli‐ding of the vessel bow will cause severe damage to the surface concrete of the pylon and will have adverse influence on the normal operation and durability of the integral structure of the pylon .