Eccentric Axial Load Testing for Concrete-Encased Steel Columns Using 800 MPa Steel and 100 MPa Concrete

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

doi:10.1061/(asce)st.1943-541x.0000533

Cited by 83 publications

(34 citation statements)

References 9 publications

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“…Distribution of effective confining stress. and equilibrium conditions, underestimates the maximum bending resistance as the ultimate compressive strain of concrete is assumed as 0.003 by ignoring the confinement effect [23]. Eurocode 4, which adopts the plastic stress distribution, overestimates the loadcarrying capacity of the TSRC sections.…”

Section: Design Suggestionsmentioning

confidence: 99%

Behaviour and design method of short square tubed-steel-reinforced-concrete columns under eccentric loading

Wang

Liu

Zhou

2016

Journal of Constructional Steel Research

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Section: Design Suggestionsmentioning

confidence: 99%

Behaviour and design method of short square tubed-steel-reinforced-concrete columns under eccentric loading

Wang

Liu

Zhou

2016

Journal of Constructional Steel Research

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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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“…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%

“…When high-strength steel is used for conventional CES columns (consisting of a wide-flange steel core and concrete encasement), early crushing of concrete encasement needs to be considered, because the steel core may not develop its full plastic strength at the concrete failure, particularly under flexural loading (Kim et al 2012. On the other hand, CFT columns using high-strength steel show excellent structural performance, because the steel tube provides good lateral confinement to concrete core and the concrete core restrains local buckling of the steel tube .…”

Section: Introductionmentioning

confidence: 99%

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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Eccentric Axial Load Testing for Concrete-Encased Steel Columns Using 800 MPa Steel and 100 MPa Concrete

Cited by 83 publications

References 9 publications

Behaviour and design method of short square tubed-steel-reinforced-concrete columns under eccentric loading

Behaviour and design method of short square tubed-steel-reinforced-concrete columns under eccentric loading

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

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