Sensitivity analysis for impact resistance of steel plate concrete walls based on force vs. time-history analysis
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摘要: 选取由表面钢板、拉结筋、剪力钉及混凝土组成的钢板混凝土结构墙为研究对象，运用经典显式非线性动力分析软件ANSYS/LS-DYNA，基于荷载时程分析法进行了一系列影响钢板混凝土结构墙抗冲击性能的参数敏感性分析。这些参数包括：墙体厚度、钢板厚度、拉结筋直径与间距等。分析结果表明，以上参数均会影响墙体的抗冲击性能，尤其是墙体与钢板的厚度以及拉结筋的间距。本文的研究工作对于核电厂核岛厂房钢板混凝土结构外墙的设计具有一定的指导与参考意义。Abstract: In this paper, to study preventive ways against incidents involving the impact of steel plate concrete (SC) structures, the steel plate concrete (SC) walls composed of surface steel plates, tie-bars, shear studs and concretes were selected as the object of investigation. The impact analysis of the walls was performed using ANSYS/LS-DYNA, the FEM code, based on the force vs. time-history analysis, in which a series of numerical sensitivity studies were conducted to evaluate the effect of several parameters affecting the behavior of the SC wall. These parameters include the thickness of the wall, the thickness of the steel plate, and the diameter and space of tie bars. The results show that they all have an effect on the impact resistance of the SC wall. This is especially true with the thickness of the wall and the steel plate, and the spacing distance between the tie bars. These studies will serve as guidance and reference for the design of SC structures that are to be used in nuclear power plant buildings.
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图 3 机身和机翼的撞击荷载时程曲线
Figure 3. Curves of impact force vs. time-history for fuselage and wings
图 4 机身和机翼的撞击面积时程曲线
Figure 4. Curves of impact area vs. time-history for fuselage and wings
图 5 波音707-320机身和机翼的均布荷载时程曲线
Figure 5. Curves of evenly distributed impact pressure vs. time-history for fuselage and wings of Boeing 707-320
图 6 波音707-320整个飞机的均布荷载时程曲线
Figure 6. Curve of evenly distributed impact pressure vs. time-history for the whole aircraft of Boeing 707-320
图 7 典型的钢板混凝土结构墙示意图
Figure 7. Schematic illustration of the typical steel plate concrete (SC) wall
图 9 不同加载模式的墙体最大位移时程曲线
Figure 9. Curves of max displacement vs. time-history of SC wall for different loads
图 10 不同加载模式的混凝土最大塑性应变时程曲线
Figure 10. Curves of max plastic strain vs. time-history of concrete for different loads
图 11 不同加载模式下混凝土的最大塑性应变云图
Figure 11. Contour plot of max plastic strain of concrete for different loads
图 12 不同厚度SC墙体的最大位移时程曲线
Figure 12. Curves of max displacement vs. time-history for SC wall with different thickness
图 13 不同厚度SC墙体的混凝土最大塑性应变时程曲线
Figure 13. Curves of max plastic strain vs. time-history for concrete of SC wall with different thickness
图 14 不同钢板厚度的墙体最大位移时程曲线
Figure 14. Curves of max displacement vs. time-history for SC wall of steel plates with different thickness
图 15 不同钢板厚度的混凝土最大塑性应变时程曲线
Figure 15. Curves of max plastic strain vs. time-history for concrete for steel plates with different thickness
图 16 不同钢板厚度的墙体最大位移时程曲线
Figure 16. Curves of max displacement vs. time-history for SC wall of steel plates with different thickness
图 17 不同钢板厚度的混凝土最大塑性应变时程曲线
Figure 17. Curves of max plastic strain vs. time-history for concrete of steel plates with different thickness
图 18 SC墙体14 mm厚背部钢板的等效应力云图
Figure 18. Contour plot of the equivalent stress of back face of 14mm steel plate for SC wall
图 19 SC墙体18 mm厚背部钢板的等效应力云图
Figure 19. Contour plot of the equivalent stress of back face of 18mm steel plate for SC wall
图 20 不同拉结筋直径的墙体最大位移时程曲线
Figure 20. Curves of max displacement vs. time-history for SC wall with different diameter of tie-bar
图 22 SC墙体背部的残余位移云图
Figure 22. Contour plot of residual displacement of SC wall back surface
图 23 SC墙体钢板的最大塑性应变云图
Figure 23. Contour plot of max plastic strain of SC wall steel plate
图 24 不同拉结筋间距的墙体最大位移时程曲线
Figure 24. Curves of max displacement vs. time-history for differently spaced tie-bar
表 1 钢板混凝土墙的材料参数
Table 1. Material parameters of steel plate concrete wall
材料 ρ/(kg·m-3) E/GPa υ fc/MPa ft/MPa 混凝土 2 400 35.2 0.2 46.0 4.2 钢板 7 800 206.0 0.3 400.0 400.0 拉结筋 7 800 206.0 0.3 330.0 330.0 剪力钉 7 800 206.0 0.3 330.0 330.0 
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