已有设防的连续刚构桥船撞风险评估分析  

Ship collision risk assessment analysis of continuous rigid frame bridge with existing fortified

作　　者：周强[1,2] 刘宪庆 余葵[1,2] 邓皓天 唐亮[3] ZHOU Qiang;LIU Xianqing;YU Kui;DENG Haotian;TANG Liang(National Engineering Research Center for Inland Waterway Regulation,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Bridge Navigation Safety and Anti-collision Engineering Technology Research Center,Chongqing Jiaotong University,Chongqing 400074,China;The School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074 [2]重庆交通大学重庆市桥梁通航安全与防撞工程技术研究中心,重庆400074 [3]重庆交通大学土木学院,重庆400074

出　　处：《水道港口》2023年第4期686-693,共8页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(52171274)。

摘　　要：随着我国内河航运的快速发展,航道等级提升、船舶大型化趋势明显,跨航道桥梁船撞风险增大。为探究典型跨航道桥梁船撞风险,以某已设防的连续刚构大桥为算例,基于AASHTO规范模型,结合有限元分析软件和现行规范标准,对桥梁船撞风险进行了数值模拟计算和分析。结果表明:桥梁涉水桥墩在2000 t级代表船型碰撞下的撞损概率和风险较低,现有主墩防撞设计满足要求,船舶单次撞击4#辅桥墩的撞损率较高,主桥墩被撞击的风险评定为4D(高风险区),辅桥墩被撞击的风险评定为4C(高风险区),桥墩被撞损的风险评定为4A(低风险区),建议结合工程河段航运发展情况适时选择合适的防撞措施。With the rapid development of inland waterway transportation in China,the trend of channel grade improvement and ship large-scale is obvious,and the risk of ship collision across channel bridges is increasing.In order to explore the ship collision risk of typical cross-channel bridges,a continuous rigid frame bridge was taken as an example.Based on the AASHTO specification model,combined with the finite element analysis software and the current standard,the ship collision risk of the bridge was numerically simulated and analyzed.The result shows that the collision loss probability and risk of the bridge wading pier under the collision of 2000 t representative ship type are low.The existing anti-collision design of the main pier meets the requirements.The collision loss rate of the single collision of the ship with 4#auxiliary pier is high.The risk of the main pier being hit is assessed as 4D(high risk area),the risk of the auxiliary pier being hit is assessed as 4C(high risk area),and the risk of the pier being hit is assessed as 4A(low risk area).It is recommended to select appropriate anti-collision measures in time in combination with the shipping development of the project river section.

关 键 词：有限元 AASHTO模型 船撞力 计算 

分 类 号：U447[建筑科学—桥梁与隧道工程]