某钢箱梁斜拉桥船撞设防标准研究  

Study on Ship Collision Protection Standard of a Steel Box Girder Cable-stayed Bridge

作　　者：王鹏[1] 油川洲 WANG Peng;YOU Chuanzhou(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;Qinghai Communications Planning and Design Research Institute Co.,Ltd.,Xining 810008)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]青海省交通规划设计研究院有限公司,西宁810008

出　　处：《公路交通技术》2021年第6期122-127,共6页Technology of Highway and Transport

摘　　要：为明确钢箱梁斜拉桥所处风险等级,采用三概率参数路径积分方法计算桥梁自身抗船撞能力及近远期年碰撞频率和倒塌频率,并与可接受风险准则进行了对比;建立桥梁、船舶精细化三维有限元模型,采用动力数值模拟方法计算桥墩在不利撞击工况下的船撞力,并与桥墩抗力进行了对比。结果表明:1)中、远期通航密度下,桥梁船撞风险将高于可接受风险,风险主要来自过渡墩;2)根据风险分析结果,大桥主墩设防代表船舶为3 000吨级,过渡墩设防代表船舶为2 000吨级,最高通航水位下过渡墩抗撞能力不满足要求,抗力差为33%。In order to determine the risk level of a cable-stayed bridge,the anti-ship collision ability of the bridge,annual collision frequency in the short and long-term and collapse frequency are calculated by three probability parameter path integral method.And it’s compared with the acceptable risk criterion.A refined three-dimensional finite element model of bridge and ship is established.The collision force of pier under adverse impact conditions is calculated by dynamic numerical simulation method and compared with the pier resistance.The results indicate that the risk of bridge-ship collision will be higher than the acceptable risk under the medium and long-term navigation density.The risk mainly comes from the transition pier.The representative ship of the main pier fortification for the bridge is 3000 tons,and the one of the transitional pier is 2000 tons.The collision resistance of the transition pier under the highest navigable water level does not meet the requirements,and the resistance difference is 33%.

关 键 词：船撞 抗撞能力 风险评估 设防标准 

分 类 号：U442.59[建筑科学—桥梁与隧道工程]