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Buckling behaviour of concrete-filled elliptical steel columnsLam, Dennis, Jamaluddin, N., Ye, J., Dai, Xianghe January 2011 (has links)
No / This paper presents the buckling behaviour and design of axially loaded concrete filled steel elliptical hollow sections. The experimental investigation was conducted using normal and high strength concrete of 30, 60 and 100 MPa. The current study includes both the stub and slender column tests. Based on the existing design guidance in Eurocode 4 for composite columns, the proposed design equations were found to provide an accurate and consistent prediction of the cross section and buckling capacity of the composite concrete filled steel elliptical hollow sections in axial compression.
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Modelling the Confinement Effect of Composite Concrete-Filled Elliptical Steel ColumnsDai, Xianghe, Lam, Dennis January 2009 (has links)
No
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Finite Element Modelling Of Slender Concrete Filled Elliptical Steel ColumnsLam, Dennis, Dai, Xianghe, Jamaluddin, N., Ye, J. January 2011 (has links)
No
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Axial capacity of concrete filled stainless steel circular columnsLam, Dennis, Roach, C. January 2006 (has links)
No description available.
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Finite Element Modelling of Beam to Concrete Filled Elliptical Steel Column ConnectionsLam, Dennis, Dai, Xianghe January 2012 (has links)
No
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Research in composite concrete filled columnsLam, Dennis January 2011 (has links)
Composite concrete filled steel tube columns are increasingly used for high-rise building structures, owing to their excellent structural
performance such as superior load-bearing capacity, high ductility,
good energy dissipation and fire behaviour which arises from the
combination of the two different materials in the structure.
Composite structures exploit the characteristics of steel and
concrete; steel with its high tensile strength and ductility and
concrete with its high compressive strength and stiffness. In
general, concrete filled composite columns with circular hollow
sections (CHS) have the advantage over columns with other
section shapes due to the circular cross sections providing a
uniform confinement to the concrete core.
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Structural behaviour of concrete-filled elliptical column to I-beam connectionsYang, Jie January 2017 (has links)
Concrete-filled tubular (CFT) columns have been widely adopted in building structures owing to their superior structural performance, such as enhanced load bearing capacity, compared to hollow tubes. Circular, square and rectangular hollow sections are most commonly used in the past few decades. Elliptical hollow section (EHS) available recently is regarded as a new cross-section for the CFT columns due to its attractive appearance, optional orientation either on major axis or minor axis and improved structural efficiency. The state of the research in terms of elliptical columns, tubular joints between EHSs and connections with CFT columns, etc., are reviewed in this thesis, showing a lack of investigations on EHSs, especially on beam to elliptical column connections which are essential in framed structures. The structural behaviour of elliptical column to I-beam connections under bending is studied in this thesis to fill the research gap. Overall ten specimens with various joint assemblies were tested to failure to highlight the benefits of adopting concrete infill and stiffeners in the columns. A three-dimensional finite element model developed by using ABAQUS software is presented and verified against obtained experimental results, which shows acceptable accuracy and reliability in predicting failure modes of the connections and their moment capacities. Parametric studies were performed to access the main parameters that affecting the bending behaviour of the connections. A simple hand calculation method in terms of ultimate moment capacity is proposed according to experiments conducted for connections with concrete-filled columns.
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Structural behaviour of beam to concrete-filled elliptical steel tubular column connectionsYang, Jie, Sheehan, Therese, Dai, Xianghe, Lam, Dennis 07 September 2016 (has links)
Yes / Elliptical Hollow Sections (EHSs) have been utilized in construction recently because of their visual appearance as well as the potential structural efficiency owing to the presence of the two principle axes. However, little information currently exists for the design of beam to elliptical column connections, which is an essential part of a building structure. Thus, to ensure the safe and economic application of EHSs, a new research project has been initiated. Rotation behaviour of simply bolted beam to concrete-filled elliptical steel column connections was investigated experimentally. Various joint types were considered and the benefits of adopting core concrete and stiffeners were highlighted. This paper covers the experimental studies and simulation of the connections using the ABAQUS standard solver. Comparisons of failure modes and moment vs. rotation relationships of the connections between numerical and experimental results were given. Good agreement has been obtained and the developed finite element model was therefore adopted to conduct a preliminary parametric study to explore the effect of critical parameters on the structural behaviour of beam to concrete-filled elliptical column connections.
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Experimental study of beam to concrete-filled elliptical steel tubular column connectionsYang, Jie, Sheehan, Therese, Dai, Xianghe, Lam, Dennis 25 June 2015 (has links)
Yes / This paper investigated the rotation behaviour of simply bolted I-beam to concrete-filled elliptical steel tubular (CFEST) column connections experimentally. Ten different joint assemblies were tested to failure, with a constant axial compressive load applied to the column and upwards concentrated loads at the beam ends. All of the steel tubes were hot-finished and had a cross-sectional aspect ratio of 2. The orientation of the column and the arrangement of the stiffening plates were taken into consideration. Moment versus rotation relationships and failure modes were compared for each joint, highlighting the benefits of using core concrete and stiffeners in these connections.
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Structural Behaviour of Concrete-filled Elliptical Column to I-beam ConnectionsYang, Jie January 2017 (has links)
Concrete-filled tubular (CFT) columns have been widely adopted in building
structures owing to their superior structural performance, such as enhanced load
bearing capacity, compared to hollow tubes. Circular, square and rectangular
hollow sections are most commonly used in the past few decades. Elliptical
hollow section (EHS) available recently is regarded as a new cross-section for
the CFT columns due to its attractive appearance, optional orientation either on
major axis or minor axis and improved structural efficiency.
The state of the research in terms of elliptical columns, tubular joints between
EHSs and connections with CFT columns, etc., are reviewed in this thesis,
showing a lack of investigations on EHSs, especially on beam to elliptical column
connections which are essential in framed structures.
The structural behaviour of elliptical column to I-beam connections under bending
is studied in this thesis to fill the research gap. Overall ten specimens with various
joint assemblies were tested to failure to highlight the benefits of adopting
concrete infill and stiffeners in the columns.
A three-dimensional finite element model developed by using ABAQUS software
is presented and verified against obtained experimental results, which shows
acceptable accuracy and reliability in predicting failure modes of the connections
and their moment capacities. Parametric studies were performed to access the
main parameters that affecting the bending behaviour of the connections. A
simple hand calculation method in terms of ultimate moment capacity is proposed
according to experiments conducted for connections with concrete-filled columns.
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