Chinese Journal of Ship Research, Volume. 19, Issue 2, 120(2024)

Study on ultimate strength of box girder considering intact initialimperfections under cyclic bending moments

Huwei CUI1,2, Runwen HU1, and Qiyin DING1
Author Affiliations
  • 1School of Shipping and Naval Architecture, Chongqing Jiaotong University, Chongqing 400074, China
  • 2Hubei Key Laboratory of Inland Shipping Technology, Wuhan University of Technology, Wuhan 430063, China
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    Figures & Tables(17)
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    • Table 1. Parameters of material model

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      Table 1. Parameters of material model

      参数值名称材料模型的参数值
      理想弹塑性各向同性强化Chaboche材料模型[23]
      $E/{{\mathrm{MPa}}}$211 000211 000211 000
      $v$0.30.30.3
      ${\sigma _{\rm{Y}}}/{\mathrm{MPa}}$293293293
      $ G/\mathrm{MPa} $1 000
      ${C_{1}}/{\mathrm{MPa}}$13 921
      $ \gamma_{_1} $765
      ${C_{2}}/{\mathrm{MPa}}$4 240
      $ \gamma_{_2} $52
      ${C_3}/{\mathrm{MPa}}$1 573
      $ \gamma_{_3} $14
      ${Q_\infty }/{\mathrm{MPa}}$25.6
      ${B_1}$4.4
    • Table 2. Meshing strategies

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      Table 2. Meshing strategies

      网格划分策略单元划分个数箱型梁单元总数极限强度/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)实验值[22]/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)误差/%
      板长方向板宽方向加强筋腹板高度方向
      粗糙281035 4886.25×1085.88×1086.29
      中等301257 5605.94×1081.02
      精细321479 8565.91×1080.51
    • Table 3. Load conditions

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      Table 3. Load conditions

      工况编号循环模式载荷幅值/rad(取中垂状态为正)有无残余应力材料模型
      工况1单次中垂${\text{0}}{\text{.005}}$理想弹塑性
      工况2单次中垂${\text{0}}{\text{.005}}$理想弹塑性
      工况3单次中垂${\text{0}}{\text{.007}}$各向同性强化
      工况4单次中垂${\text{0}}{\text{.007}}$各向同性强化
      工况5循环中垂${\text{0}}{\text{.005 ~ 0}}{\text{.006 ~ 0}}{\text{.007}}$各向同性强化
      工况6循环中垂${\text{0}}{\text{.005 ~ 0}}{\text{.006 ~ 0}}{\text{.007}}$各向同性强化
      工况7循环中垂–中拱$ \pm {\text{0}}{\text{.005 ~ }} \pm {\text{0}}{\text{.005 ~ }} \pm {\text{0}}{\text{.005 ~ 0}}{\text{.03}}$Chaboche材料模型
      工况8循环中垂–中拱$ \pm {\text{0}}{\text{.005 ~ }} \pm {\text{0}}{\text{.005 ~ }} \pm {\text{0}}{\text{.005 ~ 0}}{\text{.03}}$Chaboche材料模型
      工况9循环中垂–中拱$ \pm {\text{0}}{\text{.006 ~ }} \pm {\text{0}}{\text{.006 ~ }} \pm {\text{0}}{\text{.006 ~ 0}}{\text{.03}}$Chaboche材料模型
      工况10循环中垂–中拱$ \pm {\text{0}}{\text{.006 ~ }} \pm {\text{0}}{\text{.006 ~ }} \pm {\text{0}}{\text{.006 ~ 0}}{\text{.03}}$Chaboche材料模型
      工况11循环中垂–中拱$ \pm {\text{0}}{\text{.007 ~ }} \pm {\text{0}}{\text{.007 ~ }} \pm {\text{0}}{\text{.007 ~ 0}}{\text{.03}}$Chaboche材料模型
      工况12循环中垂–中拱$ \pm {\text{0}}{\text{.007 ~ }} \pm {\text{0}}{\text{.007 ~ }} \pm {\text{0}}{\text{.007 ~ 0}}{\text{.03}}$Chaboche材料模型
    • Table 4. Comparison between numerical calculation results and experimental results

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      Table 4. Comparison between numerical calculation results and experimental results

      工况计算值/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)实验值[22]/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)误差/%
      工况15.94×1085.88×108+1.02
      工况25.84×108–0.68
    • Table 5. Comparison of ultimate strength

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      Table 5. Comparison of ultimate strength

      工况剩余极限强度/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)单次加载极限强度/(${{\mathrm{N}}} \cdot {{\mathrm{mm}}}$)下降程度/%
      工况75.320×10810.44
      工况95.173×1085.94×10812.91
      工况115.040×10815.15
      工况85.349×1088.41
      工况105.169×1085.84×10811.49
      工况124.993×10814.50
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    Huwei CUI, Runwen HU, Qiyin DING. Study on ultimate strength of box girder considering intact initialimperfections under cyclic bending moments[J]. Chinese Journal of Ship Research, 2024, 19(2): 120

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    Paper Information

    Category: Ship Structure and Fittings

    Received: Nov. 9, 2022

    Accepted: --

    Published Online: Mar. 18, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.03171

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