超高车辆与箱梁立交桥碰撞简化计算模型评估分析

郭玉旭 席丰 谭英华 胡亚超 刘锋

郭玉旭, 席丰, 谭英华, 胡亚超, 刘锋. 超高车辆与箱梁立交桥碰撞简化计算模型评估分析[J]. 爆炸与冲击, 2023, 43(3): 033302. doi: 10.11883/bzycj-2022-0029
引用本文: 郭玉旭, 席丰, 谭英华, 胡亚超, 刘锋. 超高车辆与箱梁立交桥碰撞简化计算模型评估分析[J]. 爆炸与冲击, 2023, 43(3): 033302. doi: 10.11883/bzycj-2022-0029
GUO Yuxu, XI Feng, TAN Yinghua, HU Yachao, LIU Feng. Analysis on assessment of simplified compuational models for collision of over-height vehicles with box-girder flyovers[J]. Explosion And Shock Waves, 2023, 43(3): 033302. doi: 10.11883/bzycj-2022-0029
Citation: GUO Yuxu, XI Feng, TAN Yinghua, HU Yachao, LIU Feng. Analysis on assessment of simplified compuational models for collision of over-height vehicles with box-girder flyovers[J]. Explosion And Shock Waves, 2023, 43(3): 033302. doi: 10.11883/bzycj-2022-0029

超高车辆与箱梁立交桥碰撞简化计算模型评估分析

doi: 10.11883/bzycj-2022-0029
基金项目: 国家自然科学基金(12172198,52078283)
详细信息
    作者简介:

    郭玉旭 (1997- ),男,博士研究生,yxg1997@stu.cqu.edu.cn

    通讯作者:

    席 丰 (1963- ),男,博士,教授,博士生导师,xifeng@sdjzu.edu.cn

  • 中图分类号: O389; U447

Analysis on assessment of simplified compuational models for collision of over-height vehicles with box-girder flyovers

  • 摘要: 为了考察受超高车辆撞击装配式钢筋混凝土箱梁跨线桥的冲击动力和破坏行为,以一起近来发生的实际工程事故为案例进行精化有限元数值分析,并提出了双质量-并联弹簧(double mass-parallel spring, DM-PS)简化车辆模型,以有效地模拟超高车辆与桥梁的非对心碰撞行为。所建议DM-PS简化模型的有效性通过与两种广泛使用的车辆模型包括全尺(full scale, FS)模型和简单刚体(simple rigid, SR)模型的比较而得到充分地评估。计算结果表明:采用FS模型可得到与事故现场照片基本一致的跨线桥撞击区域破坏特征;SR模型高估结构的局部破坏,弱化结构的整体变形;DM-PS模型对于预测结构破坏具有较高的准确性。因此,所提出的DM-PS模型为超高车辆撞击桥梁结构防护设计提供了一个简单有效的分析手段。在此基础上,利用DM-PS模型进行了详细的结构行为参数分析,深入考察了车辆撞击速度、撞击质量、撞击位置以及结构形式等效应。所得到的结论为:相比撞击质量,结构的冲击动力行为对于撞击速度有更高的敏感性;跨中受撞和边跨受撞的变形和破坏模式有较大差异,边跨受撞对于单侧支座损伤更严重;箱梁内的箱板以及底板可以有效提高结构的抗冲击性能。
  • 图  1  车辆和箱桥结构

    Figure  1.  Vehicle and box-girder bridge structure

    图  2  桥梁有限元模型

    Figure  2.  A finite-element model of the bridge

    图  3  全尺寸车辆有限元模型

    Figure  3.  A full-scale (FS) vehicle finite-element (FE) model

    图  4  SR车辆模型

    Figure  4.  A simple-rigid (SR) vehicle model

    图  5  DM-PS车辆模型

    Figure  5.  DM-PS vehicle model

    图  6  混凝土单轴应力-应变曲线

    Figure  6.  Uniaxial stress-strain curves of concrete

    图  7  单元尺寸敏感性

    Figure  7.  Sensitivity to element size

    图  8  受撞击区域的破坏面对比

    Figure  8.  Failure comparison at collision area

    图  9  受撞击正面损伤云图

    Figure  9.  Damage contour of collision frontal

    图  10  桥面法向位移与切向位移

    Figure  10.  Normal and tangential displacement of the bridge deck

    图  11  不同瞬时箱梁结构损伤云图

    Figure  11.  Box girder damage contours at different instants

    图  12  SR模型计算结果

    Figure  12.  Simulation results by using the SR model

    图  13  DM-PS模型计算结果

    Figure  13.  Simulation results by using the DM-PS model

    图  14  能量分布对比

    Figure  14.  Comparison of energy distribution

    图  15  撞击力时程曲线对比

    Figure  15.  Comparison of collision force-time history curves

    图  16  具有加强底板的箱梁有限元模型

    Figure  16.  Box girder FE model with reinforced plate

    图  17  车辆质量和速度对破坏深度的影响

    Figure  17.  Effect of mass and velocity of vehicles on failure depth

    图  18  撞击力时程曲线

    Figure  18.  Collision force-time history curves

    图  19  桥体特征位移与支座损伤分析

    Figure  19.  Bridge characteristic displacement and base failure analysis

    图  20  受撞击正面SDEG云图

    Figure  20.  SDEG contours of collision frontal

    图  21  桥面损伤和结构破坏

    Figure  21.  Damage of the bridge deck and structural failure

    图  22  有无加强底板的结构破坏

    Figure  22.  Structural failure with or without reinforced plate

    图  23  桥面切向位移对比

    Figure  23.  Comparison of tangential displacement

    图  24  撞击后结构转角

    Figure  24.  Structural rotation angle after collision

    图  25  不同工况撞击后的结构转角

    Figure  25.  Structural rotation angles after collision under different working conditions

    图  26  不同工况下的混凝土破坏深度

    Figure  26.  Concrete failure depths after collision under different working conditions

    表  1  单元数目及类型

    Table  1.   Number and type of elements

    项目单元数目尺寸/mm单元类型
    桥体2 324 62450C3D8R
    箱板 177 12820C3D8R
    支座 3 36820C3D8R
    钢筋 108 64250B31
    地面 1 296500 R3D4
    下载: 导出CSV

    表  2  模型工况

    Table  2.   Model working conditions

    模型M/tvo/(m·s−1)箱梁类型-X撞击位置-Y
    M-vo-XY34/44/5415/20/25无底板/有底板跨中/边跨
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-19
  • 修回日期:  2022-05-27
  • 网络出版日期:  2022-06-01
  • 刊出日期:  2023-03-05

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