既有跨航道双幅桥梁抗船舶碰撞设计研究  

RESEARCH ON THE DESIGN OF SHIP COLLISION RESISTANCE OF EXISTING CROSS-CHANNELDOUBLE-WIDTH BRIDGE

作　　者：陈曦 李乾坤 CHEN Xi;LI Qiankun(Guangdong Heli Civil Engineering Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广东和立土木工程有限公司,广州510000

出　　处：《低温建筑技术》2023年第9期145-148,共4页Low Temperature Architecture Technology

摘　　要：为保障航道船只通行安全及既有跨航道桥梁运行安全,需要对抗撞能力不足的桥梁进行抗船舶碰撞设计。文中以广东某座桥为背景,经建模分析可知桥梁不满足抗船撞要求,由于左右幅桥梁为不同的结构形式,故采用左右幅桥梁承台接触式连接,中间留出缝隙,插入支座挂板的加固措施,对左右幅桥梁进行抗船撞加固。结果表明针对左右幅不同结构形式的桥梁,承台接触式连接,中间插入支座挂板的加固形式可有效地提升桥梁的抗船撞能力,同时也可较好地防止两桥因混凝土收缩徐变、温度梯度等因素的差异而造成的应力集中。工程实例可为类似桥梁防船撞加固提供参考。In order to ensure the safety of the passage of ships in the channel and the safety of the operation of the existing cross-channel bridges,it is necessary to design the anti-ship collision of bridges with insufficient collision capabilities.A numerical model of bridge in Guangdong is analyzed,and the bridge does not meet the requirements of anti-ship collision,since the left and right bridges are different structural forms.So the left and right bridge piles are used to connect,leaving a gap in the middle,and inserting reinforcement measures of support hanging plates to strengthen the left and right bridges against ship collision.The results show that for bridges with different structural forms on the left and right,the reinforcement form of bearing platform connection and intermediate insertion of sup⁃port hanging plate effectively improve the anti-ship collision ability of the bridge,which also prevents the stress con⁃centration caused by the difference in concrete shrinkage creep and temperature gradient between the two bridges.The experience may provide the reference for future bridge anti ship collision reinforcement.

关 键 词：抗船舶碰撞 桥梁加固 强迫振动法 等效屈服弯矩 

分 类 号：TU318[建筑科学—结构工程]