Eccentric Axial Load Capacity of High-Strength Steel-Concrete Composite Columns of Various Sectional Shapes

Kim, Chang-Soo; Park, Hong-Gun; Chung, Kyung-Soo; Choi, In-Rak

doi:10.1061/(asce)st.1943-541x.0000879

Cited by 97 publications

(39 citation statements)

References 21 publications

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“…Insufficient test data are available for SRC columns with high-strength steel and concrete. Experimental investigations and numerical simulations of SRC columns have been conducted by Ellobody [4], [5], Chen [6] and Kim [7], [8]. Although many published works focus on SRC columns with normal-strength materials, research on SRC columns with high-strength materials is rather limited.…”

Section: Introductionmentioning

confidence: 99%

Design of high‐strength steel reinforced concrete columns – a Eurocode 4 approach

Chiew

Cai

2018

Steel Construction

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The current design codes for steel reinforced concrete (SRC) columns are, in general, only applicable to normal-strength materials. In Eurocode 4, concrete grades C20/25 to C50/60 and steel grades S235 to S460 are allowed to be used in composite columns, whereas it is possible to use higher-strength concrete (up to C90/105) in Eurocode 2 and S690 steel in Eurocode 3. In this paper, an analytical method is proposed to predict the ultimate strength of SRC columns, taking into account the effect of strain compatibility and lateral confinement. A finite element model is developed to analyse the behaviour of SRC columns under axial loading using ABAQUS. The parametric studies are conducted by varying the diameter, spacing and volumetric ratio of the lateral reinforcement and the column length. It was found that the full plastic method given in EC4 overestimated the strength of SRC columns with high-strength steel. Nevertheless, the proposed method can predict the strength of SRC columns with concrete strengths up to 90 N/mm 2 and steel strengths up to 690 N/mm 2 .

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Section: Introductionmentioning

confidence: 99%

Design of high‐strength steel reinforced concrete columns – a Eurocode 4 approach

Chiew

Cai

2018

Steel Construction

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“…For verification, the nonlinear numerical analysis results by the proposed model were compared with the previous test results ( Kim et al 2014;2017;Eom et al 2014;Hwang et al 2016). Table 1 and Figs.…”

Section: Verificationsmentioning

confidence: 99%

“…(2) Steel angles provide good confinement to concrete core (Calderon et al 2009;Montuori and Piluso 2009;Nagaprasad et al 2009;Badalamenti et al 2010;Kim et al 2014Kim et al , 2017Eom et al 2014;Hwang et al 2015Hwang et al , 2016, but the effect of local buckling on the confinement should be also considered. Thus, unlike the existing models (Calderon et al 2009;Montuori and Piluso 2009;Nagaprasad et al 2009;Badalamenti et al 2010), in which the full leg b s of steel angles was assumed to exert the confining pressure in whole analysis steps, the proposed model assumed that only the effective leg b s;eff exerts the confining pressure after local buckling of steel angles (Fig.…”

Section: Concrete and Confinementmentioning

confidence: 99%

“…To this end, the fiber model analysis method was used (El-Tawil and Deierlein 1996;Kim et al 2012Kim et al , 2014Kim et al , 2017 considering the strain compatibility, confinement effect of steel angles and transverse reinforcement, local buckling of steel angles and longitudinal bars, premature spalling of concrete cover at corners, effect of local buckling of steel angles on confinement, and secondorder effect (Fig. 4).…”

Section: Nonlinear Numerical Analysismentioning

confidence: 99%

“…To predict residual strength after spalling of concrete cover at corners, a simple approach was also discussed. Kim et al (2014Kim et al ( , 2017 performed eccentric axial load tests for four CES-A columns with various transverse reinforcements (lattices, battens, links, and rectangular spirals) using Grade 800 MPa steel and 100 MPa concrete (Table 1; Figs. 2, 3).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Investigation on Load-carrying Capacity of High-strength Concrete-encased Steel Angle Columns

Kim

Hwang

2018

Int J Concr Struct Mater

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To investigate the load-carrying capacity of high-strength concrete-encased steel angle (CES-A) columns, in which corner steel angles are encased in concrete and transmit column loads directly, a numerical study was performed by using a proposed analysis model. The proposed model considered the strain compatibility, confinement effect, local buckling, and premature cover-spalling, and was verified against previous experimental study results. To investigate the effect of design parameters, a parametric study was conducted, and based on the parametric study results, a simple approach was also discussed to predict the residual strength (2nd peak load) after spalling of concrete cover at corners (1st peak load). The numerical investigations showed that when steel contribution and confinement efficiency are high, CES-A columns exhibit relatively large load-carrying capacity even after cover-spalling, due to the maintained strength of confined concrete and yielding of steel angles, and the proposed simple approach gave a good prediction for the residual strength.

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Numerical investigation for the design of rectangular concrete encased steel composite columns

Ergun

Schäfer

2021

ce papers

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Advanced design methods are becoming more important for the structural analysis. However, their results depend strongly on the quality of the numerical model and its underlying assumptions. Current Eurocode 4 does not provide clear guidance for this analysis type. A literature review on the compression tests conducted on concrete encased steel composite columns is presented. It was found out that there is a lack in the literature when it comes to the testing of slender composite columns as opposed to numerous tests done on stub columns. A selection of existing specimen tests are then simulated using finite element analysis software ABAQUS. Nonlinearity in the model was defined through materials and geometry. The interface modelling between steel and concrete as well as the modelling of load introduction are discussed. The finite element model was intended to be as generic as possible so that it can be taken as a basis for future parameter studies. Moreover, the column resistance check using interaction curves was discussed. Different approaches to form interaction curves namely strain limitation and plastic section capacity were compared.

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Eccentric Axial Load Capacity of High-Strength Steel-Concrete Composite Columns of Various Sectional Shapes

Cited by 97 publications

References 21 publications

Design of high‐strength steel reinforced concrete columns – a Eurocode 4 approach

Design of high‐strength steel reinforced concrete columns – a Eurocode 4 approach

Numerical Investigation on Load-carrying Capacity of High-strength Concrete-encased Steel Angle Columns

Numerical investigation for the design of rectangular concrete encased steel composite columns

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