中空夹层椭圆钢管混凝土短柱偏压性能试验与数值分析

陈经纬; 王静峰; 苏杭; 胡子明; 程谦勇

doi:10.3724/j.gyjzG23122115

中空夹层椭圆钢管混凝土短柱偏压性能试验与数值分析

doi: 10.3724/j.gyjzG23122115

1. 合肥工业大学土木与水利工程学院, 合肥 230009;
2. 土木工程结构与材料安徽省重点实验室, 合肥工业大学, 合肥 230009

详细信息

作者简介:
陈经纬,硕士研究生,主要从事钢结构与组合结构研究。电子信箱:chenjingwei921@163.com

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出版历程
- 收稿日期: 2023-12-21
- 网络出版日期: 2025-01-04
- 刊出日期: 2024-12-20

Performance and Numerical Analysis of Eccentrically-Loaded Concrete-Filled Double-Skin Elliptical Steel Tubular Short Columns

1. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;
2. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei University of Technology, Hefei 230009, China

摘要

摘要: 为研究中空夹层椭圆钢管混凝土短柱的偏压性能,设计和开展了9根中空夹层椭圆钢管混凝土短柱的试验研究,并基于试验结果建立了考虑椭圆截面特征等因素影响的中空夹层椭圆钢管混凝土偏压短柱的精细化数值分析模型,明确了包括偏心率、空心率、径厚比及长短轴比等诸多因素对其承载力和延性的影响规律,揭示了中空夹层椭圆钢管混凝土短柱在偏压作用下的典型破坏形态。研究表明,中空夹层椭圆钢管混凝土偏压短柱的破坏模式主要包括偏压侧外钢管环向鼓曲、偏拉侧外钢管受拉屈服、内钢管局部内凹、混凝土压溃破坏;中空夹层钢管混凝土短柱的偏压承载力随着偏心率、空心率、径厚比的减小及钢材强度和混凝土强度的增大而增大。
- 中空夹层 /
- 椭圆钢管混凝土 /
- 偏压试验 /
- 有限元分析 /
- 破坏模式
Abstract: To study the performance of eccentrically-loaded concrete-filled double-skin elliptical steel tubular(CFDEST) short columns, the paper designed and carried out nine eccentric tests on CFDEST short columns, and established a refined numerical analysis model for CFDEST short columns considering elliptical cross-section characteristics. This model incorporated various factors such as eccentricity, hollow ratio, thickness ratio, and aspect ratio, elucidating their influence on the bearing capacity and ductility. Furthermore, it revealed the typical failure modes of CFDEST short columns under eccentric loading. The results showed that the failure modes of CFDEST short columns under eccentric compression include radial bulging of the compression-side outer steel tube, tension yielding of the tension-side outer steel tube, localized inward deformation of the inner steel tube, and concrete crushing failure. Additionally, the eccentric bearing capacity of these columns increased with the decrease of eccentricity, hollow ratio, and thickness ratio, as well as with the increase in steel and concrete strengths.
- double-skin /
- concrete-filled elliptical steel tube /
- eccentric compression test /
- finite element analysis /
- failure mode

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