船桥撞击力影响因素有限元仿真模拟分析  

Finite Element Simulation of Influencing Factors of Ship⁃bridge Impact Force

作　　者：曹明 张南[1] 沈强 代彦辉 李晓锐 CAO Ming;ZHANG Nan;SHEN Qiang;DAI Yanhui;LI Xiaorui(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211816

出　　处：《防灾减灾工程学报》2021年第3期603-611,共9页Journal of Disaster Prevention and Mitigation Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划重点课题(2017G004-B);国家自然科学基金(51278243)资助。

摘　　要：为了探究船桥碰撞时船撞力的影响因素,选取合适的船撞力为桥梁设计提供参考,采用动力分析软件LS‑DYNA,结合沪通长江大桥、天生港专用航道桥以及厦漳大桥三座实桥,分别进行了不同船速、不同通航水位、不同基础形式和不同船型等因素对船撞力的影响分析研究。研究结果表明:船撞力峰值和船速正相关;中通行水位时,船桥撞击动力响应最大;不同桥墩基础和不同船型对船撞力有较大影响。基于中国铁路规范和有限元计算结果,考虑了船舶类型和基础类型对船撞力的影响,对船撞力计算公式提出改进方法,所得研究结果可为桥梁抗撞设计和研究提供参考。In order to explore the influencing factors of ship-bridge impact force and adopt an appropri‑ate design impact force of ship-bridge collision,the dynamic analysis software IS-DYNA was used to analyze and study the influence of ship speeds,navigable water levels,foundation forms and ship types on the impact force of ship-bridge collision,respectively,taking the Hutong Yangtze river bridge,special channel bridge of Tiansheng port and Xiazhang bridge as examples.The results show that the peak impact force of ship-bridge collision is positively correlated with the ship speed,and when the navigable water stage is medium,the dynamic response of ship-bridge collision is the great‑est;the pier foundation type and ship shape have great influence on the impact force of ship-bridge col‑lision.Based on the Chinese code and simulation results of finite element analyses,the improved cal‑culation method for impact force of ship-bridge collision is proposed by considering ship type and foun‑dation type,which provides the references for the design and research of bridge anti-collision.

关 键 词：船桥碰撞 撞击力 影响因素 有限元仿真 模拟分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]