冲击荷载作用下CFST构件力学响应的标度效应：钢比的影响

IF 5.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Impact Engineering Pub Date : 2025-05-19 DOI:10.1016/j.ijimpeng.2025.105398

Liu Jin, Qian Fu, Renbo Zhang, Jian Li, Xiuli DU

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引用次数: 0

摘要

由于尺度效应的存在，几何相似的CFST构件的抗冲击性能不再相似。因此，对于几何形状相似的CFST构件，钢的配比是否会影响其抗冲击的标度效应还没有明确的结论。基于此，为研究钢比对抗冲击标度效应的影响，设计几何相似（λ=1,2,3,4）的7种钢比CFST构件进行冲击数值模拟。研究发现，钢比的增加削弱了几何相似CFST构件冲击响应的标度效应，如损伤变形、能量吸收和冲击力等。主要原因是钢比的增加削弱了几何形状相似的CFST构件在整个冲击过程中跨中冲击区塑性变形范围和程度的差异，导致挠度变形、接触刚度、惯性力和应力波传播的差异显著减小。此外，本文还提出了考虑钢比的结垢效应计算公式。为CFST构件抗冲击性能的工程应用推广和理论深入研究提供支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Scaling effect of mechanical response for CFST component subjected to impact load: The effect of steel ratio

Due to the existence of scaling effect, the impact resistance of geometrically similar CFST components is no longer similar. So whether the steel ratio will affect the scaling effect of the impact resistance for geometrically similar CFST components has not been clearly concluded. Based on this, in order to study the influence of steel ratio on the scaling effect of the impact resistance, geometrically similar (λ=1,2,3,4) CFST components with seven steel ratios were designed for impact numerical simulation. It is found that the increase of steel ratio weakens the scaling effect of the impact response for geometrically similar CFST components, such as damage deformation, energy absorption and impact force, etc. The main reason is that the increase of steel ratio weakens the difference of plastic deformation range and degree in mid-span impacted area for geometrically similar CFST components during the whole impact process, which leads to a significant reduction in the difference of deflection deformation, contact stiffness, inertial force and stress wave propagation. In addition, this study also proposes the calculation formulas of scaling effect considering the steel ratio. It is expected to provide support for the engineering application promotion and the theoretical in-depth study of impact resistance for the CFST components.

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来源期刊

International Journal of Impact Engineering 工程技术-工程：机械

CiteScore

8.70

自引率

13.70%

发文量

241

审稿时长

52 days

期刊介绍： The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications