| Analysis of Collision Protection for Ocean and Offshore Structures |
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| 作者姓名： | 朱斌 陈云敏 梁以德 |
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| 作者单位： | Department of Civil Engineering Zhejiang University Hangzhou 310027 China，Department of Civil Engineering Zhejiang University Hangzhou 310027 China，Department of Building and Construction City University of Hong Kong Hong Kong China |
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| 摘 要： | 1 .Introduction Many accidents of ocean and offshore structuresinvolve impact loadings .Some famous ship colli-sion cases arethe Tj rn Bridge (Sweden) ,the West Bridge of the Great Belt Link (Denmark) andtheMaracaibo Bridge (Venezuela) . Most studies usedthe Hertzian contact law(Zukaset al .,1982) tocalculate the impact force and analyze structures subjectedtoimpact loadings .Other alternative meth-ods such as the spring-dashpot and momentumbalance methods utilizedthe coefficient of rest…
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| 关 键 词： | 海洋 碰撞 近海结构 海冰 |
| 收稿时间： | 2005-08-21 |
| 修稿时间： | 2006-05-18 |
Analysis of Collision Protection for Ocean and Offshore Structures |
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| ZHU Bin,CHEN Yun-min,LEUNG A.Y.T.Analysis of Collision Protection for Ocean and Offshore Structures[J].China Ocean Engineering,2006,20(3):361-372. |
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| Authors: | ZHU Bin CHEN Yun-min LEUNG AYT |
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| Abstract: | An elasto-plastic impact model based on the p-version finite element method is presented for the collision protection of ocean and offshore structures. The impact force and responses of the impactor-absorber-structure system can be predicted efficiently and automatically. A cost-effective Cellular Reinforced Concrete Absorber (CRCA) is designed to smooth the impact force and absorb the impact energy. Quasi-static tests show that the concrete absorber has an excellent energy absorbing characteristic. The impact experiment of a scaled offshore oil-piping frame with the proposed concrete absorber is carried out. The simulation results of the elasto-plastic model and the p-version finite element method are in good agreement with the experimental ones. Owing to the plastic deformation of the absorber, the impact force during the impact and responses of the structure are considerably reduced. Further, the proposed impact model and the concrete absorber are applied to the design of collision protection of the sheet-pile groin on the Qiantang River used to weaken the famous Qiantang bore. |
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| Keywords: | ocean and offshore structure elasto-plastic impact p-version finite element method absorber |
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