摘要
为确定粉房湾长江大桥设防船撞力标准,采用美国AASHTO规范方法和三概率参数积分路径方法对该桥进行船撞风险分析,计算桥梁的碰撞概率和年倒塌频率,并与可接受的风险准则进行比较;确定船撞设计代表船型,采用LS-DYNA软件对船舶碰撞桥梁进行数值模拟分析。分析结果表明:该桥在2010年、2020年和2050年通航密度下的船撞风险分别为4.05×10-6、2.02×10-5、7.06×10-5;P3、P4主墩的船撞设计代表船型均为5 000吨级;近期P3、P4主墩的设防船撞力可分别取38.68MN和27.57MN,远期可分别取38.68MN和24.19MN,P3、P4主墩抗力均满足船撞设防标准。
To determine the protection criteria for ship collision forces of Fenfangwan Changjiang River Bridge,the ship collision risk of the bridge was analyzed,the collision probability and the annual bridge collapse probability were calculated by the AASHTO method and the three-probability parameter integral path method,and the analysis and calculation were compared to the acceptable risk criteria.The representative types of ships used for the ship collision design were determined and the software LS-DYNA was used to carry out numerical simulation of the ships colliding against the bridge.The results of the analysis indicate that the ship collision risk of the bridge under the shipping density in the years 2010,2020 and 2050 are respectively 4.05×10-6,2.02×10-5 and 7.06×10-5.The representative types of the ships colliding against the main piers P3 and P4 of the bridge are of the 5 000 tonnage,the ship collision force protection of the piers in the near future can be determined as 38.68 MN and 27.57 MN and in the far future can be 38.68 MN and 24.19 MN,which will all satisfy the protection criteria of the ship collision of the piers.
出处
《桥梁建设》
EI
CSCD
北大核心
2012年第A01期7-12,共6页
Bridge Construction
关键词
斜拉桥
公轨两用桥
船撞分析
风险分析
数值模拟
有限元法
cable-stayed bridge
light rail-cum-road bridge
ship collision analysis
risk analysis
numerical simulation
finite element method
