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桥梁防撞钢套箱抗撞性能的解析计算方法
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作者单位:

1.湖南大学土木工程学院;2.湖南大学风工程与桥梁工程湖南重点实验室

作者简介:

通讯作者:

基金项目:

湖南科技重大专项计划(2017SK1010),国家自然科学基金(51978258)


Analytical Method for Estimating the Anti-collision Performance of Steel Fenders of Bridge Structures
Author:
Affiliation:

1.School of Civil Engineering,Hunan University;2.Key Laboratory for Wind and Bridge Engineering of Hunan Province,Hunan University

Fund Project:

Major Program of Science and Technology of Hunan Province(2017SK1010),National Natural Science Foundation of China(51978258)

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    摘要:

    采用非线性有限元分析桥梁防撞钢套箱性能时费时耗力,因此建立准确快速的分析方法十分必要,尤其在初步设计时。基于船–船碰撞解析研究,分析了钢套箱竖向外板、横肋、竖桁等构件的变形机理与破坏模式,讨论了钢套箱在不同撞击位置下的撞击力差异,结果表明:由于钢套箱与船舶舷侧结构的尺寸差异,其横竖桁排布密、间距小,使得撞击点处相邻构件能够很快参与受力,不同撞击位置下的撞击力差异并不显著。结合不同船艏外形撞击下的钢套箱受力情形,建立了典型的碰撞场景模型,提出了同时适用于带球艏船舶、楔形艏船舶撞击下的钢套箱抗撞性能的解析计算方法。采用提出的解析计算方法,计算了钢套箱在不同船舶外形撞击下的撞击力–撞深曲线,通过与精细有限元分析结果对比表明:解析计算方法的结果与精细有限元分析结果较好地吻合,证明了解析方法的有效性。

    Abstract:

    Using nonlinear finite element analysis (FEA) method to analyze anti-collision performance evaluations of steel fenders require much time and effort. It is crucial and urgent to develop an accurate and efficient approach, particularly in the preliminary design of steel fenders. In this context, based on the analytical methodology of the ship-ship collision, the deformation mechanisms and failure modes of structural members in steel fenders (e.g., outer plate, transverse, and vertical ribs) were investigated. The characteristics of impact forces under different impact locations were carefully discussed. The analysis results indicate that the adjacent members at the impact location could work cooperatively at the same time because of the close arrangement and the small space inside the steel fender, and the differences of impact forces under various impact positions would be not significant. Based on the resistance characteristics of steel fenders under difference bow shapes, the typical collision scenarios were defined. Accordingly, the analytical method was developed to estimate the anti-collision performance of steel fenders, which is suitable for both ship vessels with a bulbous bow and those with a raked bow. The impact force versus crush depth curves of steel fenders were obtained by using the proposed analytical method for different ship impacts. The analytical results were compared with those obtained from the FEA. Results show that the analytical results are in good agreement with the FE results, indicating the rationality of the analytical method developed in this study.

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历史
  • 收稿日期: 2019-08-04
  • 最后修改日期: 2019-11-06
  • 录用日期: 2019-11-12
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