Experimental Study of Composite Hollow RC Column under Uniaxial Compressive Load

Won, Deokhee; Kim, Seungjun; Seo, Jihye; Kang, Young Jong

doi:10.3390/app9030373

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…Due to the heavy weight and high cost for large size columns such as bridge columns, the voided columns can give an alternative design with large, enough stiffness and limited total weight of the columns as shown in figure1 [1].Many researchers studied the structural behavior of voided columns under eccentric loading [2,3]. They explained the advantage of lightweight and the effects of parameters such as concrete strength, inner steel tube thickness at voided columns.…”

Section: Introductionmentioning

confidence: 99%

Performance of voided Concrete Columns under Lateral Loads.

Hmedia

Abdel-Ghaffar

abdelgalil

et al. 2023

Engineering Research Journal - Faculty of Engineering (Shoubra)

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This research focused on the structural behavior of voided concrete columns under lateral load. Voided concrete columns have the advantage of decreasing the own weight of columns as well as the column total cost rather than the convenient construction methods. An experimental study on the behavior of columns with inner void is performed. A total of two column specimens have been tested considering both axial and lateral loads. The control specimen C1 with solid section contains longitudinal steel bar 4Ø16 while specimen C2 contains square void 100*100mm and longitudinal steel reinforcement bar 4Ø16. According to the test results, the voided column exhibited higher ductility than control specimen, reference to the increasing in maximum displacement, but the control specimen exhibited total lateral capacity higher than the voided concrete column, the decreasing of the lateral and ultimate capacity can be compared to the cost enhancement regarding the decreasing of the concrete volume used in the voided column.

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Section: Introductionmentioning

confidence: 99%

Performance of voided Concrete Columns under Lateral Loads.

Hmedia

Abdel-Ghaffar

abdelgalil

et al. 2023

Engineering Research Journal - Faculty of Engineering (Shoubra)

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“…Many works are devoted to the study of the behavior of concrete and reinforced concrete columns under axial loading [29][30][31][32]. At the same time, numerical simulation methods [33][34][35], experimental methods [31], and complex methods are widely used to confirm the created models [29,30,[36][37][38][39][40][41][42]. The material of the columns is also quite diverse in these studies.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Calculation of Improved Centrifuged Reinforced Concrete Columns with Variotropic Structure

et al. 2023

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The use of vibro-centrifugation technology allows the manufacture of variotropic structures that are inhomogeneous in the annular section and have different characteristics along the section thickness. Hardening of the outer layers allows the structure to better resist bending conditions, however, the behavior of the variotropic column under central and eccentric compression remains unexplored. This article considers the problem of compression of hollow columns made of homogeneous concrete that is non-uniform in the annular section (variotropic), and is reinforced with steel reinforcing bars at different values of the load application eccentricity. Variotropic concrete obtained by vibro-centrifugation technology has a stronger outer part and a less durable inner part. The strength of a homogeneous column corresponds to the strength of the middle part of variotropic concrete. The problem was solved numerically in the ANSYS environment for a vertical column rigidly clamped at the bottom edge and loaded with eccentricity at the top edge. Three types of eccentricity are considered; e/r = 0, 0.16 and 0.32 (respectively 0 mm, 0.24 mm and 48 mm). The results of the solution in the form of stress fields, deformations and a pattern of crack development in a spatial setting are obtained. The results showed that for central compression, a homogeneous column has a better bearing capacity of 3.6% than a variotropic one. With the values of eccentricity e/r = 0.16 and 0.32, the variotropic column has a higher bearing capacity (by 5.5% and 6.2%) than the homogeneous one and better resists the development of cracks. The significance of the study lies in the practical application of the proposed approach, developed on a research basis, for non-trivial and complicated operating conditions of columns. This study influences the development of reinforced concrete structures and applies scientific findings to engineering practice.

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“…Many studies investigated the axial load capacity of composite CFT columns, both numerically and experimentally [4][5][6]. For example, Won et al [7] presented an experimental study of the behaviour of a steel-composite hollow reinforced concrete (RC) column under concentric loading. The effects of important variables, such as concrete strength, inner tube thickness, hollow ratio, column diameter and transverse reinforcement space, are presented in the study.…”

Section: Introductionmentioning

confidence: 99%

Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method

et al. 2022

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The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT) when applied to the top-down construction method as temporary internal supports for ceilings. Their ultimate capacity to take into account the actual boundary conditions of the column is essential for successful application in construction. The paper presents the full-scale in situ testing of four slender specimens with variable D/t ratios under concentric axial loading. The CFT columns were supported on the previously jacked concrete piles. In addition, detailed finite element numerical models in ABAQUS and PLAXIS computer programs were developed. The models include the nonlinear behaviour of materials and the nonlinear behaviour of soil. The soil–pile–column interaction and impact of the CFT column–pile connection stiffness on global column stability were considered. The numerical model was validated by comparison with the experimental results. In conclusion, the coefficient for the effective buckling length of the studied columns is proposed. Finally, the experimental results of the critical buckling forces were compared with widely used international design codes Eurocode 4-EC4, American standard-ACI and the Australian standard-AS.

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Experimental Study of Composite Hollow RC Column under Uniaxial Compressive Load

Cited by 8 publications

References 7 publications

Performance of voided Concrete Columns under Lateral Loads.

Performance of voided Concrete Columns under Lateral Loads.

Modeling and Calculation of Improved Centrifuged Reinforced Concrete Columns with Variotropic Structure

Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method

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