桥梁浮式钢围堰船舶撞击动力响应分析  

Analysis on Dynamical Response of Floating Steel Cofferdam of Bridge Under Ship Collision

作　　者：薛宪政 陈坤 许明财[2,3] XUE Xianzheng;CHEN Kun;XU Mingcai(The Fifth Survey and Design Institute(Group)Co.,Ltd.,China Railway Construction Corporation Limited,Bejing 102600,China;School of Naval Architecture&Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Lituo Bridge of Technology Protection Device Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600 [2]华中科技大学船舶与海洋工程学院,武汉430074 [3]武汉力拓桥科防撞设施有限公司,武汉430070

出　　处：《船舶工程》2022年第7期54-58,64,共6页Ship Engineering

摘　　要：钢围堰作为临时性围护结构,在桥梁建成后应予以拆除。在具有大水深、水位落差大等情况的库区,承台也有被撞击的可能性,需要进行防护。为了节约成本,提出利用双壁钢围堰作为防撞设施的方案。为了提高吸能和抗撞性能,在钢围堰内部填充复合材料。通过钢结构和复合材料的压溃变形来吸收撞击能量,对承台起到保护作用。采用显式有限元方法建立了承台、船舶和防撞设施模型,模拟船舶撞击承台和钢围堰的碰撞过程,分析了钢围堰对船舶撞击力的消减情况。应力、变形和能量耗散等数据表明该方案在船撞情况下能较好防护桥梁。As a temporary enclosure structure,the steel cofferdam should be demolished after the bridge is built.In the reservoir area with large water depth and large water level drop,the bearing platform may also be impacted and needs to be protected.To make cost lower,a plan to use the double-wall steel cofferdam as an anti-collision facility is proposed.In order to improve energy absorption and crash resistance,composite materials are filled in the steel cofferdam.The impact energy is absorbed by the crushing deformation of the steel structure and composite materials,which protects the bearing platform.The explicit finite element method is used to establish the models of the bearing platform,the ship and the anti-collision facilities,and the collision process of the ship impacting the bearing platform and the steel cofferdam is simulated,and the reduction of the impact force of the ship by the steel cofferdam is analyzed.The data of stress,deformation and energy dissipation show that the scheme can protect the bridge better in the case of ship collision.

关 键 词：桥梁 船舶 钢围堰 碰撞 数值模拟 

分 类 号：U443.26[建筑科学—桥梁与隧道工程]