Axial capacity and ductility of circular UHPC-filled steel tube columns
Abstract
This paper presents an experimental study of circular ultra-high-performance concrete-filled steel tube (UHPCFT) columns under monotonic axial compression. Some performance indices, termed concrete contribution ratio (CCR), strength enhancement index (SI) and ductility index (DI), are investigated in relation to the diameter-to-thickness ratio (D/t) of the UHPCFT columns. The axial bearing capacities of the UHPCFT columns obtained from the test results are compared with Eurocode 4, American Concrete Institute, Australian Standards and Architectural Institute of Japan design codes. The test results show that increasing the steel tube thickness from 2·5 mm to 3·65 mm enhances the DI by 69%, but the SI only by 5%. Although the Eurocode 4 design code overestimates the axial bearing capacities of the UHPCFT columns, the American Concrete Institute, Australian Standards and Architectural Institute of Japan codes are conservative.
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UHPC and steel tubes are compatible, based on studies of the relationship between strength increase and ductility indices of UHPC-filled steel tube columns and the diameter-to-thickness ratios of the steel tubes.
“Studies on the relationship between the strength increase and ductility indices of UHPC-filled steel tube columns (UHPC-FSTCs) and the diameter-to-thickness ratios of the steel tubes [16,17] have found that the two materials are compatible.”
From Bond-Slip Performances of Ultra-High Performance Concrete Steel Tube Columns Made of a Large-Diameter Steel Tube with Internally Welded Steel Bars (2023) · cites this paper as [16]
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“Studies on the relationship between the strength increase and ductility indices of UHPC-filled steel tube columns (UHPC-FSTCs) and the diameter-tothickness ratios of the steel tubes [16,17] have found that the two materials are compatible.”
Background
- Authors
- Guler, S., Çopur, A., & Aydogan, M.
- Affiliations
- Research assistant, Faculty of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
- Istanbul Technical University (TR)
- Professor, Faculty of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
- Venue
- Magazine of Concrete Research
- Publisher
- Emerald
- Published
- 2013-08
- Volume
- 65
- Issue
- 15
- Pages
- 898-905
- ISSN
- 0024-9831 (ISSN-L)
- 1751-763X
- OpenAlex
- W2022873388
- Cited by
- 111
- References
- 7
- Citations by year
- 2026: 8 · 2025: 15 · 2024: 13 · 2023: 24 · 2022: 14 · 2021: 16 · 2020: 6 · 2019: 7 · 2018: 3 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 1
- FWCI
- 2.89
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Magazine of Concrete Research (publishedVersion)
- Van Yüzüncü Yıl University Academic Data Management System (submittedVersion)
- Istanbul Technical University Academic Open Archive (Istanbul Technical University) (submittedVersion)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Structural Load-Bearing Analysis
- Physical Sciences › Engineering › Building and Construction › Structural Behavior of Reinforced Concrete
- Physical Sciences › Engineering › Civil and Structural Engineering › Fire effects on concrete materials
- Keywords
- ultra-high performance concrete, concrete-filled steel tube columns, circular columns, axial compression, axial load capacity, ductility, diameter-to-thickness ratio, ductility index, design code comparison, Eurocode 4, ACI 318
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