既有多跨上承式肋形连拱桥抗船撞性能分析  

Ship Collision Analysis of Deck Ribbed Multiple Arch Bridge

作　　者：赵波涌 刘汉彪 黄义飞 贺耀北 樊伟[2] 卢江波 ZHAO Boyong;LIU Hanbiao;HUANG Yifei;HE Yaobei;FAN Wei;LU Jiangbo(Hunan Provincial Communications Planning,Survey&Design Institute Co.,Ltd.,Changsha,Hunan 410200,China;College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China)

机构地区：[1]湖南省交通规划勘察设计院有限公司,湖南长沙410200 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《公路工程》2023年第6期39-44,共6页Highway Engineering

基　　金：湖南创新型省份建设专项经费资助项目(2021SK2052);湖南创新型省份建设专项经费资助项目(2020RC3081);湖南省交通科技项目(202245)。

摘　　要：大量早期建设的桥梁亟待进行抗船撞性能评估。以某既有多跨上承式肋形连拱桥为背景,提出了一套完整的抗船撞性能评估流程。着重总结了现有船舶撞击力确定的方法,采用各类方法计算了该桥船舶撞击力,并进行了对比分析,推荐采用非线性有限元法。建立了全桥有限元模型,对船舶撞击工况下桥墩及拱肋抗弯、抗剪能力进行评估,结果表明:(1)较大截面尺寸的实体式桥墩具有优越的抗撞性能,但横流向船舶撞击对桥梁结构安全的影响应获得更大的关注;(2)拱肋为肋形拱桥的薄弱构件,对于既有肋形拱桥,应采取有效措施,避免船撞拱肋事故发生。Large quantities of early built bridges need to be evaluated for their ship collision resistance.Based on an existing deck ribbed multi arch bridge,a complete set of ship collision evaluation process was proposed in this paper.The existing calculation methods of ship impact force are emphatically summarized,and used in the evaluation.Through comparative analysis,nonlinear finite element method is recommended.In order to evaluate the bending and shear resistance of piers and arch ribs under ship impact,a full-bridge finite element model is established.The results show:①The solid pier with large section has excellent ship collision resistance,but more attention should be paid to the impact of ship collision in cross-flow direction on the safety of bridge structures.②Arch rib is the weak component of deck ribbed arch bridge,and effective measures shall be taken to avoid ship hitting the arch rib.

关 键 词：肋形拱桥 抗船撞性能 撞击力 有限元分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]