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          華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (12): 127-132 DOI10.13245/j.hust.201222

          欄目:土木工程
          極端波浪對跨海橋梁上部結構作用研究
          趙西增 a , b , 童晨奕 c , 姚炎明 a
          a. 浙江大學海洋學院,浙江 舟山 316021
          b. 浙江大學海洋感知技術與裝備教育部工程研究中心,浙江 舟山 316021
          c. 浙江交工集團股份有限公司,浙江 杭州 310051
          摘要 通過物理模型實驗和數值模擬相結合的方法,利用能量聚焦方式模擬產生極端波浪,開展極端波浪對跨海橋梁上部結構作用的模擬研究.重點分析不同淹沒狀態下橋梁上部結構受極端波浪作用時的波面變化、橋梁底部壓強及整體波浪力變化,探究橋梁上部結構發生損壞的可能原因.結果表明:未淹沒情況下,橋梁主要受波浪砰擊力作用,砰擊力是造成橋梁上部結構發生損壞的可能原因;半淹沒和全淹沒情況下,橋梁主要受動水壓力作用,傾覆力是造成橋梁上部結構發生損壞的可能原因;橋梁所受水平波浪力隨著凈空減小而逐漸增大,直至橋梁全淹沒后趨于穩定,所受豎直波浪力則在凈空為零時最大.
          關鍵詞 極端波浪 ;橋梁上部結構 ;物理模型實驗 ;數值模擬 ;波浪力
          Study on extreme wave impacting on superstructure of coastal bridge
          ZHAO Xizeng a , b , TONG Chenyi c , YAO Yanming a
          a. Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang China
          b. The Engineering Research Center of Oceanic Sensing Technology and Equipment,Ministry of Education,Zhejiang University,Zhoushan 316021,Zhejiang China
          c. Zhejiang Communications Construction Group Co. Ltd.,Hangzhou 310051,China
          Abstract 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.
          Keywords extreme wave ; bridge superstructure ; physical modeling experiment ; numerical simulation ; wave force
          基金資助國家自然科學基金資助項目(51679212,51979245);浙江大學仲英青年學者資助項目

          中圖分類號O353
          文獻標志碼A
          文章編號1671-4512(2020)12-0127-06
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          文獻來源
          趙西增, 童晨奕, 姚炎明. 極端波浪對跨海橋梁上部結構作用研究[J]. 華中科技大學學報(自然科學版), 2020, 48(12): 127-132
          DOI:10.13245/j.hust.201222
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