A Cyclic Nonlinear Model for Concrete-Filled Tubes. II: Verification

Hajjar, Jerome F.; Gourley, Brett C.; Olson, Matthew C.

doi:10.1061/(asce)0733-9445(1997)123:6(745)

Cited by 25 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental work investigates the ductility and strength properties of steel tubular columns filled with a high strength concrete core, using short and slender columns subjected to either concentric or eccentric loads. The results are compared to recent published data from the USA, Australia, and China [1][2][3][4][5][6][7][8][9][10][11][12]. The protocol for the column compression tests used both concentric and eccentric load rigs.…”

Section: Introductionmentioning

confidence: 99%

Properties of High-Strength Concrete Filled Steel Tube Columns

Tan¹,

Nichols²

2017

MCSE

View full text Add to dashboard Cite

Abstract. High Strength Concrete Filled Steel tubes (CFST) provide a common construction material in China. The purpose of this research was to determine the axial load properties for CFST subjected to concentric and eccentric loading in a series of experiments. The results show that the magnitude of experimentally measured compressive strength increases for the core concrete, due to the confinement from the steel that is proportional to the ratio of the area of steel to the area of concrete. If the slenderness ratio is kept constant the columns bearing capacity and maximum strain decreases as the eccentricity to radius ratio increases. Formulas to estimate the load bearing capacity for short and for slender eccentrically loaded columns were established from the data. The results have been compared statistically to other published results to show that a general linear form of the capacity equation is warranted for High Strength Concrete Filled Steel tubes. Keywords:Concrete filled steel tubes, high strength concrete, bridge construction. IntroductionThe purpose of this research is to experimentally investigate the properties of concrete filled steel tubes (CFST) using a high strength concrete core. The experimental work investigates the ductility and strength properties of steel tubular columns filled with a high strength concrete core, using short and slender columns subjected to either concentric or eccentric loads. The results are compared to recent published data from the USA, Australia, and China [1][2][3][4][5][6][7][8][9][10][11][12]. The protocol for the column compression tests used both concentric and eccentric load rigs. The columns used in the experiments have length to diameter ratios ranging from 3.5 to 15. This paper outlines the literature relevant to this work, provides a methods section, outlines and summarizes the results and the key findings, and provides a conclusion. Literature ReviewCFST column types have been used in recent high-rise structures in China [13][14][15][16][17][18][19][20][21][22]. CFST structures are emerging as an important structural system for new buildings, particularly for providing earthquake resistance. Steel tubular columns filled with normal strength concrete (NSC) have been studied using slender and eccentrically loaded units [23,24], and based on these studies; a design code has been established for Chinese use [25]. A sketch of a typical CFST building connection showing a column and beam connection is drawn in Figure 1. This sketch provides the definitions of the steel wall thickness, diameter of the steel tube and the area of the concrete core of the composite tube. The schematic format of the connection detail shown in Figure 1 comes from a recent Chinese building. The connection detail has been simplified by reducing the number of bolt holes and stiffener plates. The steel plate for the beam connection transfers the load to the steel tube, which relies on the concrete to provide buckling restraint and increased strength for the given cross-sectional area.An ea...

show abstract

Section: Introductionmentioning

confidence: 99%

Properties of High-Strength Concrete Filled Steel Tube Columns

Tan¹,

Nichols²

2017

MCSE

View full text Add to dashboard Cite

show abstract

“…joints), frame beam/column elements are still primarily used for the CFT member and composite frame analysis. Hajjar and Gourley [5,6] developed a concentrated plasticity 3D finite element for the simulation of a CFT beamcolumn behavior. The plastic hinges at the element ends are described by a two-surface, bounding surface model in the stress-resultant P-M y -M z space.…”

Section: Introductionmentioning

confidence: 99%

Application of Generalized Plasticity Model in Square CFT Column Analysis

Kostić¹,

Filippou²,

Deretić-Stojanović³

2014

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

In the paper, an efficient three-dimensional concentrated plasticity nonlinear beam-column element is used for the simulation of the response of square CFT columns. The element adopts the concept of the generalized plasticity material model for the section resultantelement deformation relation and has plastic hinges located at the ends of the element and described with yield and limit surfaces. Determination of the adequate element parameters which are essential for a successful description of the CFT member behavior is discussed. Among these parameters, most important are the stiffness and yield surface parameters. 3523

show abstract

“…Such demands on computational resources make full three-dimensional (3D) modelling of large structures inefficient and inapplicable. Discrete frame models, however, are a good compromise between accuracy and efficiency, and this paper concentrates on the development of a computationally efficient discrete element for predicting the global response of CFS framed structures with reasonable accuracy [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…lumped and distributed) and the type of interpolated unknowns (i.e. force-based, displacement-based and mixed) [15,20,21,[23][24][25]. A full review of the different available approaches for formulating 1D steel-concrete composite elements can be found in Spacone and El-Tawil [26].…”

Section: Introductionmentioning

confidence: 99%