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

被引：0
|
作者：
Wu D.-H. [1 ]
Hou C.-C. [1 ]
机构：
[1] School of Transportation Science and Engineering, Beihang University, Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2023年 / 40卷
关键词：
concrete-filled high-strength steel tubes; failure mode; lateral impact; local damage; residual axial compression resistance;
D O I：
10.6052/j.issn.1000-4750.2022.07.S048
中图分类号：
学科分类号：
摘要：
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. © 2023 Tsinghua University. All rights reserved.
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页码：56 / 61
页数：5
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