引用本文:陈宇,吕杨,齐广政,孙熙平.船舶撞击荷载作用下高桩墩的破坏分析[J].水利水运工程学报,2019,(2):25-32
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船舶撞击荷载作用下高桩墩的破坏分析
陈宇1, 吕杨2, 齐广政3, 孙熙平3
1.中国民航大学 机场学院,天津;2.天津城建大学 土木工程学院,天津;3.交通运输部天津水运工程科学研究所,天津
摘要:
提出了以动量守恒定律为基础,试算输入不同简化撞击力时间荷载曲线,计算结构的动力响应与现场检测结果一致为准则,基于有限元模型分析船撞结构损伤破坏的数值分析方法。以中泉石化船撞高桩系缆墩事故为背景,运用通用有限元显示动力分析软件LS-DYNA,建立了高桩系缆墩的三维有限元模型,采用所提出的方法计算分析了受撞系缆墩的破坏过程。数值分析结果表明,当撞击时间为13.75 s时,系缆墩残余位移与现场检测结果一致,系缆墩在船舶撞击作用下墩台发生剪切破坏的现象与事故现场相符;同时数值模拟结果表明系缆墩灌注桩混凝土在嵌岩端上部发生不同程度破坏,钢套筒进入屈服阶段;对系缆墩结构整体进行损伤等级评估,属于中等破坏。
关键词:  高桩系缆墩  撞击  损伤  破坏模式
DOI:
分类号:TU473
基金项目:国家自然科学基金资助项目(51808270,51808380,51508373,51809132);国家重点研发计划资助项目(2016YFC0802204-1,2016YFC0802209,2016YFC0701100);天津市自然科学基金资助项目(2017917AO);中央级公益性科研院所基本科研业务费专项资金资助项目(TKS170109)
Damage analysis of high-pile cleat under ship’s impact load
CHEN Yu1, LÜ Yang2, QI Guangzheng3, SUN Xiping3
1.School of Airport Engineering, Civil Aviation University of China, Tianjin;2.School of Civil Engineering, Tianjin Chengjian University, Tianjin;3.Tianjin Research Institute for Water Transport Engineering, MOT, Tianjin
Abstract:
A new method for the numerical analysis of structures is proposed, based on momentum conservation laws to calculate the dynamic responses of the sutructre with different input simplified force-time curves using finite element model, and it stops until the numerical result is consistent with the actual value. Based on the background of the “Zhong Quan” Sinopec accident, a three dimensional model of high-pile cleat is eatablished with explicit dynamic analytical software LS-DYNA, and the failure process of the cleat under ship’s impact load is analyzed by the proposed method. The results show that the residual displacements of the cleat are consistent with the actual values when the impact time is 13.75 s, and the shear failure mode of the abutment is consistent with the situation. Also, they show that the concrete of the filling piles is damaged in various degrees at the fixed end, the steel sleeves enter the yield stage, and the cleat is evaluated as medium damage.
Key words:  high-pile cleat  impact  damage  damage mode
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