极端波浪对跨海桥梁上部结构作用研究  

Study on extreme wave impacting on superstructure of coastal bridge

作　　者：赵西增[1,2] 童晨奕 姚炎明[1] ZHAO Xizeng;TONG Chenyi;YAO Yanming(Ocean College,Ministry of Education,Zhejiang University,Zhoushan 316021,Zhejiang China;The Engineering Research Center of Oceanic Sensing Technology and Equipment,Ministry of Education,Zhejiang University,Zhoushan 316021,Zhejiang China;Zhejiang Communications Construction Group Co.Ltd.,Hangzhou 310051,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]浙江大学海洋感知技术与装备教育部工程研究中心,浙江舟山316021 [3]浙江交工集团股份有限公司,浙江杭州310051

出　　处：《华中科技大学学报（自然科学版）》2020年第12期127-132,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51679212,51979245);浙江大学仲英青年学者资助项目。

摘　　要：通过物理模型实验和数值模拟相结合的方法,利用能量聚焦方式模拟产生极端波浪,开展极端波浪对跨海桥梁上部结构作用的模拟研究.重点分析不同淹没状态下桥梁上部结构受极端波浪作用时的波面变化、桥梁底部压强及整体波浪力变化,探究桥梁上部结构发生损坏的可能原因.结果表明:未淹没情况下,桥梁主要受波浪砰击力作用,砰击力是造成桥梁上部结构发生损坏的可能原因;半淹没和全淹没情况下,桥梁主要受动水压力作用,倾覆力是造成桥梁上部结构发生损坏的可能原因;桥梁所受水平波浪力随着净空减小而逐渐增大,直至桥梁全淹没后趋于稳定,所受竖直波浪力则在净空为零时最大.Study on extreme wave impacting on the superstructure of a coastal bridge was carried out physically and numerically.The wave focusing theory was used for the generation of extreme waves.The change of wave elevation,the pressure on the bottom of the bridge and the wave force of the bridge were analyzed when the coastal bridge was under different submergence conditions.The possible causes of the damage to the bridge superstructure were explored.The results show that the bridge above the sea level is mainly affected by the wave slamming force,and the wave slamming force is the possible cause of the damage to the bridge superstructure.The semi submerged and fully submerged bridge is mainly affected by the dynamic water pressure,and the overturning force is the possible cause of the damage to the bridge superstructure.The horizontal wave force on the bridge is found to increase with the decrease of the clearance,and it tends to be stable after the bridge is fully submerged,while the vertical wave force is the largest when the clearance is zero.

关 键 词：极端波浪 桥梁上部结构 物理模型实验 数值模拟 波浪力 

分 类 号：O353[理学—流体力学]