Explicit Simulation of Circular CFST Stub Columns with External Steel Confinement under Axial Compression

Alatshan, Faesal; Osman, Siti Aminah; Mashiri, Fidelis Rutendo; Hamid, Roszilah

doi:10.3390/ma13010023

Cited by 27 publications

(24 citation statements)

References 37 publications

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“…The steel tube is assigned as the slave surface when it is in contact with the drop weight (master surface), and as the master surface when it is in contact with the surface of the concrete core (slave surface). This was also consistent with previous numerical studies with CFST models [41,42]. A tie constraint was applied between the surfaces of the steel tube and the supports.…”

Section: Component Parameter Valuesupporting

confidence: 88%

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

et al. 2020

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Reinforced concrete (RC) members in critical structures, such as bridge piers, high-rise buildings, and offshore facilities, are vulnerable to impact loads throughout their service life. For example, vehicle collisions, accidental loading, or unpredicted attacks could occur. The numerical models presented in this paper are shown to adequately replicate the impact behaviour and damage process of fibre-reinforced polymer (FRP)-strengthened concrete-filled steel tube (CFST) columns and Reinforced Concrete slabs. Validated models are developed using Abaqus/Explicit by reproducing the results obtained from experimental testing on bare CFST and RC slab members. Parameters relating to the FRP and material components are investigated to determine the influence on structural behaviour. The innovative method of using the dissipated energy approach for structural evaluation provides an assessment of the effective use of FRP and material properties to enhance the dynamic response. The outcome of the evaluation, including the geometrical, material, and contact properties modelling, shows that there is an agreement between the numerical and experimental behaviour of the selected concrete members. The experimentation shows that the calibration of the models is a crucial task, which was considered and resulted in matching the force–displacement behaviour and achieving the same maximum impact force and displacement values. Different novel and complicated Finite Element Models were comprehensively developed. The developed numerical models could precisely predict both local and global structural responses in the different reinforced concrete members. The application of the current numerical techniques can be extended to design structural members where there are no reliable practical guidelines on both national and international levels.

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Section: Component Parameter Valuesupporting

confidence: 88%

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

et al. 2020

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“…A lot of research has been conducted on thin-walled tubes for a better understanding of the core elements in terms of energy absorption [15,16]. Witteman [17] conducted a numerical study of the influence of polygonal cross-sections on the behavior of thin-walled tubes subjected to dynamic crushing in axial and oblique loadings.…”

Section: Of 18mentioning

confidence: 99%

Study of Mild Steel Sandwich Structure Energy Absorption Performance Subjected to Localized Impulsive Loading

2020

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Extensive research focus had been given to sacrificial sandwich panels to mitigate the effects of blast loads. This is due to their ability to distribute the load and absorb a significant portion of the blast energy. This paper studies the behavior of sacrificial sandwich mild steel panels of axially oriented octagonal tapered tubular cores subjected to near-field impulsive blast. The deformation behavior and several assessment parameters consisting of the peak force, stroke efficiency, energy absorption and core efficiency were investigated using validated finite element analysis. The developed deformation modes were mainly influenced by the top plate and tube thickness. Tubes of a 5° taper performed unfavorably, exhibiting increased peak force and lower energy absorption. Panels of top plate thickness of 4 mm exhibited higher stroke efficiency as compared to panels of lower thickness. The top plate and tube thickness significantly affected energy absorption. An increase of 73.5% in core efficiency was observed in thick-plate panels as compared to thin-plate ones.

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“…The application of this model was dictated by the analogy between the analyzed beam and concrete filled steel tubes (CFST) used in civil engineering. Research on CFST [31][32][33][34][35][36][37] shows that the steel profile and concrete filling behave together as a structure made of a uniform material. Additionally, research shows that steel pipes filled with concrete are subject to Saint-Venant's Principle [38].…”

Section: Model Assumptionsmentioning

confidence: 99%

Finite Element Modeling of the Dynamic Properties of Composite Steel–Polymer Concrete Beams

et al. 2020

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This paper presents a method for modeling the dynamic properties of steel–polymer concrete beams, the basic structural components of machine tools, assembly lines, vibratory machines, and other structures subjected to time-varying loads during operation. The presented method of modeling steel–polymer concrete beams was developed using the finite element method. Three models of beams differing in cross-sectional dimensions showed high agreement with experimental data: relative error in the case of natural frequencies did not exceed 5% (2.2% on average), the models were characterized by the full agreement of mode shapes and high agreement of frequency response functions with the results of experimental tests. Additionally, the developed beam models supported the reliable description of complex structures, as demonstrated on a spatial frame, obtaining a relative error for natural frequencies of less than 3% (on average 1.7%). Full agreement with the mode shapes and high agreement with the frequency response functions were achieved in the analyzed frequency range.

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Explicit Simulation of Circular CFST Stub Columns with External Steel Confinement under Axial Compression

Cited by 27 publications

References 37 publications

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

Study of Mild Steel Sandwich Structure Energy Absorption Performance Subjected to Localized Impulsive Loading

Finite Element Modeling of the Dynamic Properties of Composite Steel–Polymer Concrete Beams

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