船舶碰撞中空夹层钢管混凝土导管架平台损伤分析

针对船舶与中空夹层钢管混凝土（CFDST）导管架平台碰撞问题，利用ABAQUS/Explicit非线性有限元软件建立中空夹层钢管混凝土导管腿导管架数值模型，对船舶碰撞进行数值模拟，对比分析1 m/s、2 m/s和3 m/s的3种碰撞速度下工况下导管架抗碰撞性能、耗能及损伤。从碰撞力、碰撞区域变形以及导管架能量耗散等方面详细研究中空夹层钢管混凝土导管腿作用下导管架整体的损伤模式和动力响应。结果表明：CFDST导管架在船舶碰撞荷载作用下主要由CFDST导管腿耗能，有效控制了结构整体位移变形，提升了整体刚度，有效发挥平台各构件之间组合耗能，结构抗碰撞能力得到明显提升。

Analysis of damage to concrete-filled double skin steel tube jacket platform by ship collision

For the collision problem of ship and concrete-filled double skin steel tube (CFDST) jacket platform, the numerical model of concrete-filled double skin steel tube conduit leg jacket platform is established by using ABAQUS/Explicit nonlinear finite element software, and the numerical simulation of ship collision is carried out to compare and analyze the resistance of the jacket platform under three working conditions of 1 m/s, 2 m/s and 3 m/s collision speeds. The collision performance, energy dissipation and damage are compared and analyzed. The loss pattern and dynamic response of the overall catenary under the action of concrete-filled double skin steel tube catenary legs are studied in detail in terms of collision force, collision area deformation and catenary energy dissipation. The results show that the CFDST jacket platform is mainly dissipated by the CFDST conduit leg under the action of ship collision load, which effectively controls the overall structural displacement and deformation, improves the overall stiffness, and effectively exerts the combined energy dissipation among the platform members, and the structural collision resistance is significantly improved.