吴大豪, 侯川川. 高强钢管混凝土撞击后力学性能数值研究[J]. 工程力学, 2023, 40(S): 56-61. DOI: 10.6052/j.issn.1000-4750.2022.07.S048
引用本文: 吴大豪, 侯川川. 高强钢管混凝土撞击后力学性能数值研究[J]. 工程力学, 2023, 40(S): 56-61. DOI: 10.6052/j.issn.1000-4750.2022.07.S048
WU Da-hao, HOU Chuan-chuan. NUMERICAL STUDY ON THE POST-IMPACT MECHANICAL PROPERTIES OF CONCRETE-FILLED HIGH-STRENGTH STEEL TUBES[J]. Engineering Mechanics, 2023, 40(S): 56-61. DOI: 10.6052/j.issn.1000-4750.2022.07.S048
Citation: WU Da-hao, HOU Chuan-chuan. NUMERICAL STUDY ON THE POST-IMPACT MECHANICAL PROPERTIES OF CONCRETE-FILLED HIGH-STRENGTH STEEL TUBES[J]. Engineering Mechanics, 2023, 40(S): 56-61. DOI: 10.6052/j.issn.1000-4750.2022.07.S048

高强钢管混凝土撞击后力学性能数值研究

NUMERICAL STUDY ON THE POST-IMPACT MECHANICAL PROPERTIES OF CONCRETE-FILLED HIGH-STRENGTH STEEL TUBES

  • 摘要: 为分析高强钢管混凝土撞击后力学性能,该文建立了高强钢管混凝土在低速侧向撞击下以及轴压剩余承载力数值模型,模型考虑了高强钢和混凝土的材料应变率效应等以及动力-静力加载工况之间的结果衔接。使用现有高强钢管混凝土低速侧向撞击和静力加载试验结果对所建立模型的合理性进行了验证。采用建立的有限元模型,对高强钢管混凝土低速侧向撞击和静力侧向加载后的破坏形态、局部损伤和跨中挠度对于其轴压剩余承载力的影响规律进行了对比分析,理清了影响其轴压剩余承载力的关键因素,并发展了相应的简化计算模型。

     

    Abstract: To analyze the post-impact mechanical properties of concrete-filled high-strength steel tubes, a numerical model for the residual axial compression resistance of concrete-filled high-strength steel tubes under low-speed lateral impact and axial compression is established in this paper. The model takes into account the material strain rate effects of high-strength steel and concrete, as well as the transfer of results between the dynamic and static analysis procedures. The feasibility of the model is verified using the existing low-speed lateral impact and static loading test results of concrete-filled high-strength steel tubes. The established finite element model is used to compare and analyze the influence of failure mode, local damage and mid-span deflection of post-impact concrete-filled high-strength steel tubes after lateral impact and static lateral loading on its residual axial compressive resistance, elaborating the key factors affecting its residual axial compression resistance. A simplified calculation model for the residual axial compression resistance is established based on the analysis.

     

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