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Properties Of Concrete

Developments and advanced applications of concrete-filled steel tubular (CFST) structures: Members

In practice, concrete-filled steel tubes (CFST) are often subjected to torsion. To date, such a problem however has not been addressed satisfactorily by design codes. The present study is thus an attempt to study the torsional behaviours of concrete-filled thin-walled steel tubes. ABAQUS software is used in this paper for the finite element analysis (FEA) of CFST subjected to pure torsion. A comparison of results calculated using this modelling shows good agreement with test results. The FEA modelling was used to investigate the influence of important parameters that determine the ultimate torsional strength of the composite sections. The parametric studies provide information for the development of formulae to calculate the ultimate torsional strength, as well as the torsional moment versus torsional strain curves of the composite sections.

Performance of concrete-filled thin-walled steel tubes under pure torsion

Finite element modelling of concrete-filled steel stub columns under axial compression

Proper material constitutive models for concrete-filled tube (CFT) columns are proposed and verified by the nonlinear finite element program ABAQUS against experimental data. The cross sections of the CFT columns in the numerical analysis are categorized into three groups, i.e., circular section, square section, and square section stiffened by reinforcing ties. Via the numerical analyses, it is shown that for circular CFT columns, the tubes can provide a good confining effect to the concrete especially when the width-to-thickness ratio D/t is small (say D/t 30). The confining effect of square CFT columns with reinforcing ties is enhanced by the use of reinforcing ties especially when the tie spacing is small and the tie number (or tie diameter) is large.

https://ir.nctu.edu.tw:443/bitstream/11536/27503/1/000185407600004.pdf

Nonlinear analysis of axially loaded concrete-filled tube columns with confinement effect

Effects of partial shear connection on the required and available rotations of semi-continuous composite beam systems

https://apo.ansto.gov.au/dspace/bitstream/10238/10393/1/1-s2.0-S0143974X19308454-main.pdf

Residual stresses of box and I-shaped columns fabricated from S960 ultra-high-strength steel

Design resistance evaluation for steel and steel-concrete composite members

Analytical model for flexural response of two-layered composite beams with interfacial shear slip using a higher order beam theory

A number of desirable characteristics concerning excellent durability, aesthetics, recyclability, high ductility and fire resistance have made stainless steel a preferred option in engineering practice. However, the relatively high initial cost has greatly restricted the application of stainless steel as a major structural material in general construction. This drawback can be partially overcome by introducing composite stainless steel-concrete structures, which provides a cost-efficient and sustainable solution for future stainless steel construction. This paper presents a preliminary numerical study on stainless steel-concrete composite beam-to-column joints with bolted flush endplates. In order to ensure a consistent corrosion resistance within the whole structural system, all structural steel components were designed with austenitic stainless steel, including beams, columns, endplates, bolts, reinforcing bars and shear connectors. A finite element model was developed using ABAQUS software for composite beam-to-column joints under monotonic and symmetric hogging moments, while validation was performed based on independent test results. A parametric study was subsequently conducted to investigate the effects of several critical factors on the behaviour of composite stainless steel joints. Finally, comparisons were made between the numerical results and the predictions by current design codes regarding the plastic moment capacity and the rotational stiffness of the joints. It was concluded that the present codes of practice generally overestimate the rotational stiffness and underestimate the plastic moment resistance of stainless steel-concrete composite joints.

Brian Uy

Papers

Effects of partial shear connection on the required and available rotations of semi-continuous composite beam systems

Residual stresses of box and I-shaped columns fabricated from S960 ultra-high-strength steel

Design resistance evaluation for steel and steel-concrete composite members

Analytical model for flexural response of two-layered composite beams with interfacial shear slip using a higher order beam theory

Numerical analysis of stainless steel-concrete composite beam-to-column joints with bolted flush endplates