基于BIM的大跨度钢桁拱桥吊装施工分析
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摘要
BIM技术在桥梁工程中的应用较少,目前大多数BIM模拟无法考虑力学特性。针对大跨度钢桁拱建立有限元模型,分析大尺寸弦杆和K撑吊装过程中风荷载和断索情况的影响,并分别得到其累积位移-时程曲线。通过BIM技术对吊装过程进行模拟,实现了BIM技术与力学特性的结合。通过仿真模拟发现在设计施工风荷载条件和断索情况下,弦杆和K撑会对既有结构造成碰撞干涉,应停止吊装作业。在此基础上,参数化分析风荷载和断索情况下,不同基本风速与横向位移的变化规律并回归出公式,确定了该桥安全吊装的临界风荷载为13.00m/s。
The application of BIM was little in bridge engineering,and most of the BIM models cannot take mechanical properties into consideration.In the paper,to research the influence of wind load and cable fracture of large-size chord member and K-brace member during lifting construction,FEA analysis of large span steel truss arch bridge was carried out on large span steel truss arch bridge.The accumulated displacement and time curves were obtained respectively.Based on this,simulation analysis for lifting construction was conducted.BIM was associated with mechanical properties sucessfully.It was found out that chord member and K-brace member was collided with current states under the conditions of design wind load and cable fracture.Therefore,lifting operations should be banned under these conditions.In addition,parameters analyse were carried out under these two conditions,change rule and regression formulas were obtained.The critical basic wind speed of safety lifting was confirmed as 13.00 m/s.
The application of BIM was little in bridge engineering,and most of the BIM models cannot take mechanical properties into consideration.In the paper,to research the influence of wind load and cable fracture of large-size chord member and K-brace member during lifting construction,FEA analysis of large span steel truss arch bridge was carried out on large span steel truss arch bridge.The accumulated displacement and time curves were obtained respectively.Based on this,simulation analysis for lifting construction was conducted.BIM was associated with mechanical properties sucessfully.It was found out that chord member and K-brace member was collided with current states under the conditions of design wind load and cable fracture.Therefore,lifting operations should be banned under these conditions.In addition,parameters analyse were carried out under these two conditions,change rule and regression formulas were obtained.The critical basic wind speed of safety lifting was confirmed as 13.00 m/s.
引文
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[6] 张为和.基于BIM的夜郎河双线特大桥施工应用方案研究[J].铁道标准设计,2015,59(3):82-86. Zhang Weihe.BIM-based construction program for Yelang River double-line extra-long bridge[J].Railway Standard Design,2015,59(3):82-86.(in Chinese)
[7] 徐骏,李安洪,刘厚强,等.BIM在铁路行业的应用及其风险分析[J].铁道工程学报,2014(3):129-133. Xu Jun,Li Anhong,Liu Houqiang,et al.Application and risk analysis of BIM in railway Systems[J].Journal of Railway Engineering Society,2014(3):129-133.(in Chinese)
[8] 张建平,梁雄,刘强,等.基于BIM的工程项目管理系统及其应用[J].土木建筑工程信息技术,2012,4(4):1-6. Zhang Jianping,Liang Xiong,Liu Qiang,et al.BIM-based engineering project management system and application[J].Journal of Information Technology in Civil Engineering and Architecture,2012,4(4):1-6.(in Chinese)
[9] 连小华.大型钢桁架管廊桥施工控制分析[J].山西交通科技,2017(2):24-27. Lian Xiaohua.The analysis of construction control for large steel truss tube covered bridges[J].Shanxi Science &Technology of Communications,2017(2):24-27.(in Chinese)
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