基于MIDAS/Civil有限元软件对钢拱桥整体推移过程的仿真研究
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摘要
立保大桥为3跨钢管下承式拱桥,为保证施工过程不影响京杭运河的水运交通,拟采用整体推移的方法施工。鉴于目前国内外类似项目较少,为了研究整体推移过程中桥梁关键构件的应力-应变状态,基于MIDAS/Civil有限元软件,建立了仿真模型,分3个阶段对整个推移过程进行研究,找出了最大应力值和最大位移值出现的时间、位置和大小,总结了应力和位移的发展规律,结果表明在利用整体推移法施工的过程中,最大应力和最大位移均在可控范围内,满足设计要求并可保证施工安全。
Libao Bridge is a three-span steel tube through arch bridge,in order to ensure that the construction process does not affect the Beijing-Hangzhou Grand Canal water transport,it was proposed to adopt the integral transformation method. In order to study the stress-strain status of key components of bridges during the whole process of transformation,the paper established a simulation model based on MIDAS/Civil finite element software,and studied the whole process of transformation in three stages.The results showed that the maximum stress and the maximum displacement were within the controllable range in the integral transformation process,which could meet the design requirements and ensure construction safety. The research results of the paper can provide research ideas and research methods for the construction of long-span steel arch bridges of the same type using the integral transformation method.
Libao Bridge is a three-span steel tube through arch bridge,in order to ensure that the construction process does not affect the Beijing-Hangzhou Grand Canal water transport,it was proposed to adopt the integral transformation method. In order to study the stress-strain status of key components of bridges during the whole process of transformation,the paper established a simulation model based on MIDAS/Civil finite element software,and studied the whole process of transformation in three stages.The results showed that the maximum stress and the maximum displacement were within the controllable range in the integral transformation process,which could meet the design requirements and ensure construction safety. The research results of the paper can provide research ideas and research methods for the construction of long-span steel arch bridges of the same type using the integral transformation method.
引文
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[3]崔龙龙,汪莲.脱空后钢管混凝土拱桥的受力性能分析[J].工程与建设,2016,30(5):696-698.
[4]翁雅谷,邱国阳,赵长军,等.大跨钢管混凝土拱桥合理成拱线形方法研究[J].钢结构,2016,31(11):99-101.
[5]杨耀,方淑君.钢管临时结构整体稳定性数值分析[J].钢结构,2016,31(6):11.
[6]陈竣,罗凡.基于不同角度分析公路钢结构桥梁抗疲劳设计[J].公路工程,2017,42(5):183-186.
[7]潘永杰,刘晓光,赵欣欣,等.铁路桥梁结构作用分项系数的研究[J].钢结构,2015,30(3):21-24.
[8]王伟,廖芳芳,陈以一.基于微观机制的钢结构节点延性断裂预测与裂后路径分析[J].工程力学,2014,31(3):101-108.
[9]史庆轩,陈坤,田园.全钢装配式屈曲约束支撑有限元分析及试验对比[J].钢结构,2017,32(2):1-6.
[10]陈学森,施刚,王东洋,等.超大承载力端板连接节点有限元分析和设计方法[J].土木工程学报,2017,50(3):19-27.
[11]廖芳芳,王伟,陈以一.往复荷载下钢结构节点的超低周疲劳断裂预测[J].同济大学学报:自然科学版,2014,42(4):539-546.
[12]王玲,王韬,王荣霞.大跨径连续钢桁梁桥悬臂拼装线形控制方法研究[J].重庆交通大学学报(自然科学版),2017,36(11):11-15.
[13]高玉兵,杨军,何满潮,等.厚煤层无煤柱切顶成巷碎石帮变形机制及控制技术研究[J].岩石力学与工程学报,2017,36(10):2492-2502.
[14]贺拴海,梅晓亮,刘鹏,等.宽幅钢箱梁斜拉桥空间行为数值分析[J].中国公路学报,2016,29(4):42-49,58.
[15]于玲,陈德昊,包龙生.混合梁斜拉桥成桥索力优化理论及工程应用[J].辽宁工程技术大学学报(自然科学版),2016,35(2):176-181.