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

CHEN Jingwei; WANG Jingfeng; SU Hang; HU Ziming; CHENG Qianyong

doi:10.3724/j.gyjzG23122115

Volume 54 Issue 12

Dec. 2024

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CHEN Jingwei, WANG Jingfeng, SU Hang, HU Ziming, CHENG Qianyong. Performance and Numerical Analysis of Eccentrically-Loaded Concrete-Filled Double-Skin Elliptical Steel Tubular Short Columns[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(12): 156-167. doi: 10.3724/j.gyjzG23122115

Citation:

CHEN Jingwei, WANG Jingfeng, SU Hang, HU Ziming, CHENG Qianyong. Performance and Numerical Analysis of Eccentrically-Loaded Concrete-Filled Double-Skin Elliptical Steel Tubular Short Columns[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(12): 156-167. doi: 10.3724/j.gyjzG23122115

Citation:

CHEN Jingwei, WANG Jingfeng, SU Hang, HU Ziming, CHENG Qianyong. Performance and Numerical Analysis of Eccentrically-Loaded Concrete-Filled Double-Skin Elliptical Steel Tubular Short Columns[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(12): 156-167. doi: 10.3724/j.gyjzG23122115

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

doi: 10.3724/j.gyjzG23122115

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

Received Date: 2023-12-21
Available Online: 2025-01-04
Publish Date: 2024-12-20

Abstract

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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References(24)

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