Nonlinear Analysis of Axially Loaded Concrete-Filled Tube Columns with Confinement Effect

Hu, Hsuan Teh; Huang, Chih‐Feng; Wu, M.; Wu, Yih Min

doi:10.1061/(asce)0733-9445(2003)129:10(1322)

Cited by 519 publications

(396 citation statements)

References 16 publications

(10 reference statements)

Supporting

Mentioning

329

Contrasting

Unclassified

Order By: Relevance

“…Concrete Filled Tube (CFT) structures are widely used in engineering due to their excellent structural and constructional performance [1,2]; this is especially the case for typical forms of Concrete Filled Steel Tube (CFST) structures [3][4][5][6][7][8][9][10]. Attention also has been paid to Concrete Filled Fiber Reinforced Polymer (FRP) Tubes, in view of their anti-corrosion properties, which can be better adapted to corrosive environments than CFST [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Andjelic

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Abstract:The purpose of this research is to study the effect of both transverse impact, and ratio of outer diameter to thickness of outer steel tube (D/t), on the residual axial bearing capacity of concrete-filled circular steel tubular columns (CFCSTCs). A total of sixteen samples, including four samples left untreated for comparison, are experimentally studied to investigate the effect of both drop-hammer transverse impact height (H), and D/t ratio, on the residual axial bearing capacity of CFCSTCs. The failure mode, load-displacement curves, load-strain curves, and residual axial bearing capacity of those samples are extensively investigated. A finite element analysis (FEA) model is established to predict the effect of D/t ratio on the residual axial bearing capacity of CFCSTCs. The results indicate that the H and the D/t ratio have noticeable effects on the axial compression performance of CFCSTCs. Failure mode of samples is commonly local buckling. In addition, maximum reduction of the axial bearing capacity of columns reaches about 35% compared with that of untreated columns. The results also show that the bearing capacity of the column increases with a decreasing D/t ratio of the same diameter (D).

show abstract

Section: Introductionmentioning

confidence: 99%

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Andjelic

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Although there are several existing constitutive models for CFST concrete under axial load (Hatzigeorgiou, 2008;Hu et al, 2003;Liang and Fragomeni, 2009), they may not predict the capacity of CFSTs under eccentric load accurately. Investigation of the analysis method for eccentrically loaded CFST columns proposed by Liang (2011), which incorporates the identical concrete model for the axial loading case from Liang and Fragomeni (2009), revealed that the method overestimates the capacity of eccentric loading on 87 specimens by 6% on average.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, despite the fact that the real-time pressure in a CFST column is difficult to trace, it is reasonable to analyse the flexural behaviour of a CFST by a constant confining pressure throughout the loading process (Hajjar et al, 1998;Hatzigeorgiou, 2008). Subsequently, many different empirical equations have been developed to correlate the pressure with various material properties and geometry of the cross-section of CFST columns (Hatzigeorgiou, 2008;Hu et al, 2003;Tang et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

Ouyang¹,

2014

Magazine of Concrete Research

View full text Add to dashboard Cite

The existence of curvature can reduce the effective confining pressure within concrete-filled steel tube (CFST) columns under eccentric compression. The existing analysis method ignores such an effect and still treats the confining pressure as constant across the whole section as if it is under axial compression. In this paper, the authors have made significant improvements on the existing model, so that the curvature effect can be taken into account to properly interpret the non-linear behaviour of eccentrically loaded CFST columns. Meanwhile, shortening between two hinges is an important data output in test programmes of this type, which has been completely neglected by the existing analysis method. This improved method also provides calculation steps to track the value of shortening for each load increment. Unknown parameters in this new method are determined on the basis of data fitting of 87 specimens from previous researchers' test programmes. The following parameters are incorporated in this study: effective tube length (660–4670 mm), diameter of tube (76–600 mm), tube thickness (1·52–8·81 mm), yield strength of tube (256·4–517·0 MPa), cylinder strength of concrete (26·42–112·70 MPa) and eccentricity (9·4–300 mm). The load–axial displacement, load–deflection and moment–curvature curves predicted by the new method agree well with their measured counterparts in the tests.

show abstract

“…Schneider (1998) and Hu et al (2003) developed a three-dimensional (3D) nonlinear finite element model (FEM) for CFT circular columns, in which the ABAQUS program was used. The concrete confinement was achieved by matching the numerical results by trial and error using a parametric study.…”

Section: Introductionmentioning

confidence: 99%

A Simple Formula for Predicting the Compressive Strength of Circular CFT Stub Columns

Zhao

Jiang

2009

Journal of Asian Architecture and Building Engineering

View full text Add to dashboard Cite

In this paper, the predictions of ultimate strength of circular concrete-filled steel tube (CFT) stub columns using current design codes such as AIJ-2001, AISC-2005, DL/T-1999, and Eurocode 4-2004, are examined and compared with published experimental tests of CFT short columns made with normal-and highstrength steel and concrete. Based on the investigations, a simple formula for predicting the ultimate strength of CFT stub columns is proposed. The concrete confinement, which depends mainly on the ratio of the external diameter of the steel tube to the plate thickness, the yield stress of the steel tube, and the unconfined compressive strength of the filled concrete, was reasonably achieved in the proposed formula. From comparisons with the published experimental data for CFT short columns of normal and high strength steel and concrete, the present formula is shown to give a good representation of the ultimate strength of circular CFT columns.

show abstract

Nonlinear Analysis of Axially Loaded Concrete-Filled Tube Columns with Confinement Effect

Cited by 519 publications

References 16 publications

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

A Simple Formula for Predicting the Compressive Strength of Circular CFT Stub Columns

Contact Info

Product

Resources

About