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A platform for research: civil engineering, architecture and urbanism
Fire Behavior of Ultra-High Strength Concrete Filled Steel Tubular Columns Under Non-uniform Heating
This paper presents a numerical study of concrete-filled steel tubular (CFST) columns with square high strength steel tube (HSS) and ultra-high strength concrete (UHSC) under fire. CFST columns with high strength materials allow reducing material quantities and loads on foundations in buildings by reducing member sizes. However, there have been few studies on CFST under non-symmetrical fire loading with normal strength materials and none with ultra-high strength materials. In this paper, the columns are studied under non-uniform thermal exposure conditions simulating a realistic fire scenario in the building. The finite element (FE) models capture the temperature dependent material properties of the high strength materials and the effect of the thermal contact at the interface between the HSS tube and UHSC core. The numerical results are compared with experimental data on specimens exposed to uniform and non-uniform fire, showing good agreement in terms of temperature distribution, axial displacement, and failure time. Parametric analyses are then conducted to investigate the influence of various factors on the fire performance of the CFST columns including the material properties and the fire and loading conditions. Overall, the validated numerical model can be used to simulate axially loaded CFST columns under non-uniform heating and derive fire design methods for these members. The parameters which influence the behavior of the columns are discussed and recommendations are provided for developing design guidelines. Improved understanding of fire behavior of these members can support sustainable and efficient modular construction.
Fire Behavior of Ultra-High Strength Concrete Filled Steel Tubular Columns Under Non-uniform Heating
This paper presents a numerical study of concrete-filled steel tubular (CFST) columns with square high strength steel tube (HSS) and ultra-high strength concrete (UHSC) under fire. CFST columns with high strength materials allow reducing material quantities and loads on foundations in buildings by reducing member sizes. However, there have been few studies on CFST under non-symmetrical fire loading with normal strength materials and none with ultra-high strength materials. In this paper, the columns are studied under non-uniform thermal exposure conditions simulating a realistic fire scenario in the building. The finite element (FE) models capture the temperature dependent material properties of the high strength materials and the effect of the thermal contact at the interface between the HSS tube and UHSC core. The numerical results are compared with experimental data on specimens exposed to uniform and non-uniform fire, showing good agreement in terms of temperature distribution, axial displacement, and failure time. Parametric analyses are then conducted to investigate the influence of various factors on the fire performance of the CFST columns including the material properties and the fire and loading conditions. Overall, the validated numerical model can be used to simulate axially loaded CFST columns under non-uniform heating and derive fire design methods for these members. The parameters which influence the behavior of the columns are discussed and recommendations are provided for developing design guidelines. Improved understanding of fire behavior of these members can support sustainable and efficient modular construction.
Fire Behavior of Ultra-High Strength Concrete Filled Steel Tubular Columns Under Non-uniform Heating
Lecture Notes in Civil Engineering
Chouw, Nawawi (editor) / Zhang, Chunwei (editor) / Lama, L. (author) / Gernay, T. (author) / Thai, H. T. (author)
Australasian Conference on the Mechanics of Structures and Materials ; 2023 ; Auckland, New Zealand
Proceedings of the 26th Australasian Conference on the Mechanics of Structures and Materials ; Chapter: 33 ; 363-373
2024-09-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
Concrete-filled steel tubular columns , Ultra-high strength concrete , Fire behavior , Numerical analysis , Non-uniform thermal exposure Engineering , Solid Mechanics , Structural Materials , Sustainable Architecture/Green Buildings , Civil Engineering , Computer-Aided Engineering (CAD, CAE) and Design
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