某群桩套井基础式大型跨海桥梁船撞设防标准研究及抗撞性能分析  

作　　者：林佳漫 张焱焜 

机构地区：[1]广东汕头海湾大桥有限公司,广东汕头515041 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《科技创新与应用》2023年第26期93-96,101,共5页Technology Innovation and Application

摘　　要：近年来,船撞桥事故时有发生,通过合理开展船舶碰撞桥梁风险分析进而选取适宜的抗撞性能提升措施,对于保障跨航道桥梁安全运营而言具有至关重要的作用。针对某大型跨海大桥采用《公路桥梁抗撞设计规范》船撞风险概率分析方法分别计算该桥年碰撞概率和倒塌概率,并基于桥区所在航道航运发展的趋势预测10 a后全桥的船撞风险概率,并同时比较数值仿真及规范公式规定的船撞力数值大小。计算结果表明,数值仿真计算的船撞力略高于《公路桥梁抗撞设计规范》规定的船撞力计算公式数值大小;远期通航密度下,原桥结构碰撞概率较高,但全桥抗撞性能满足要求,年倒塌概率低于规范限值。In recent years,ship-bridge collision accidents have occurred from time to time.It is essential to select appropriate measures for anti-collision performance improvement through reasonable risk analysis of ship-bridge collision to ensure the safe operation of cross-channel bridges.For a large sea-crossing bridge,the probability analysis method of ship collision risk in the"Specifications for Collision Design of Highway Bridges"is used to calculate the annual collision probability and collapse probability of the bridge,and the ship collision risk probability of the whole bridge after 10 years is predicted based on the trend of shipping development in the channel where the bridge is located,and the numerical simulation and the value of ship collision force specified in the code formula are also compared.The calculation results show that the ship collision force calculated by numerical simulation is slightly higher than the value of the ship collision force calculation formula specified in the"Specifications for Collision Design of Highway Bridges";under the long-term navigation density,the collision probability of the original bridge structure is high,but the anti-collision performance of the whole bridge meets the requirements,and the annual collapse probability is lower than the specification limit.

关 键 词：跨海大桥 船撞概率 设防标准 数值仿真 倒塌概率 

分 类 号：U447[建筑科学—桥梁与隧道工程]