Mechanical behavior of stirrup-confined rectangular CFT stub columns under axial compression

Ding, Fa‐xing; Luo, Linjie; Zhu, Jiang; Wang, Liping; Yu, Zhenkun

doi:10.1016/j.tws.2017.12.007

Cited by 56 publications

(27 citation statements)

References 18 publications

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“…The triaxial plastic-damage constitutive model of RAC was based on the stress-strain relation of RAC under uniaxial stress, and combined with the parameters of concrete strength criterion under multi-axial stresses and other parameters defined below. The eccentricity is 0.1; the ratio of initial equibiaxial compressive yield stress to initial uniaxial compressive yield stress (f b0 /f c0 ) is 1.225; the ratio of the second stress invariant on the tensile meridian to that on the compressive meridian is 2/3; the viscosity parameter is taken as 0.005, and the dilation angle is 40° (Ding et al, 2011;Ding et al, 2018a;Ding et al, 2020).…”

Section: Constitutive Relation Of Infilled Recycled Aggregate Concretementioning

confidence: 99%

“…To compensate for limitations of test research, FE analysis mainly performs nonlinear analysis, parameter analysis, and failure process analysis on structures or components (Dong et al, 2016). Ding et al (Ding et al, 2011) proposed a triaxial plastic-damage constitutive model of concrete which is applied in CFST columns (Ding et al, 2018a) and structures' (Ding et al, 2020) FE model, and the results of FE models are in good agreement with the experimental data. Researchers (Dong et al, 2016;Yang et al, 2020) used the ABAQUS software to obtain the deformation characteristic, destruction characteristics and stress distribution nephogram of composite columns.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study on Confinement Effect and Efficiency of Concentrically Loaded RACFRST Stub Columns

et al. 2021

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The mechanical behaviors of recycled aggregate concrete (RAC) are upgraded by outer steel tube confinement, and the performance of recycled aggregate concrete-filled steel tubular (RACFST) columns is similar to that of the traditional concrete-filled steel tube (CFST) columns. The purpose of this study is to investigate the behaviors of recycled aggregate concrete-filled rectangular steel tubular (RACFRST) stub columns under axial loading. Three-dimensional finite element (FE) models were established, which utilized a triaxial plastic-damage constitutive RAC model considering the replacement ratio of recycled aggregates. The finite element analysis results indicated that the lessened ultimate bearing capacity of RACFRST stub columns compared with their traditional concrete infilled counterparts was mainly due to the weakened confinement effect and confinement efficiency. A simplified formula of the bearing capacity of concentrically loaded RACFRST stub columns was proposed. The cross-sectional stress nephogram was reasonably simplified by the limited state of infilled concrete. The basics of proposed formula were the equilibrium condition and the superposition method. Finally, the formula for the bearing capacity of RACFRST stub columns was evaluated by comparing its accuracy and feasibility to some design formulae proposed by specialists and some design codes of different regions.

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Section: Constitutive Relation Of Infilled Recycled Aggregate Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Study on Confinement Effect and Efficiency of Concentrically Loaded RACFRST Stub Columns

et al. 2021

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“…The infilled concrete can prevent the steel tubes from buckling inward, which can increase the critical local buckling strength, leading to the full utilization of the strength of the steel tube and the concrete. A large number of experimental and theoretical investigations into the performance of CFT columns have been carried out for decades (Abdalla et al, 2013; Abed et al, 2013; Bleich, 1952; Chang et al, 2013; Choi et al, 2017; Ding et al, 2015a, 2015b, 2018; Du et al, 2016; Ekmekyapar, 2016; Evirgen et al, 2014; Ge and Usami, 1992, 1994; Khan et al, 2017; Kwan et al, 2016; Kwon and Jeong, 2014; Liew et al, 2016; Montuori and Piluso, 2015; Ouyang et al, 2017; Timoshenko and Gere, 1961; Yang et al, 2015; Zhao et al, 2018). According to these studies, the confinement effects of square or rectangular concrete-filled sections are much less than those of circular CFT columns.…”

Section: Introductionmentioning

confidence: 99%

Local buckling of rectangular concrete-filled steel tubular columns with binding bars under eccentric compression

Wan

Cai

Long

et al. 2020

Advances in Structural Engineering

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Based on the energy method, this article presents a theoretical study on the elastic local buckling of steel plates in rectangular concrete-filled steel tubular columns with binding bars subjected to eccentric compression. The formulas for elastic local buckling strength of the steel plates in eccentrically loaded rectangular concrete-filled steel tubular columns with binding bars are derived, assuming that the loaded edges are clamped and the unloaded edges of the steel plate are elastically restrained against rotation. Then, the experimental results are compared with these formulas, which exhibits good agreement. Subsequently, the formulas are used to study the elastic local buckling behavior of steel plates in rectangular concrete-filled steel tubular columns with binding bars under eccentric compression. It is found that the local buckling stress of steel plates in eccentrically loaded rectangular concrete-filled steel tubular columns with binding bars is significantly influenced by the stress gradient coefficient, width-to-thickness ratio, and the longitudinal spacing of binding bars. With the decrease of width–thickness ratios or the longitudinal spacing of binding bars or with the increase of the stress gradient coefficient, the local buckling stress increases. Furthermore, the influence of the longitudinal spacing of binding bar is more significant than the stress gradient coefficients. Finally, appropriate limitation for depth-to-thickness ratios ( D/ t), width-to-thickness ratios ( B/ t), and binding bar longitudinal spacing at various stress gradient coefficients ( α0) corresponding to different cross-sectional aspect ratios ( D/ B) are suggested for the design of rectangular concrete-filled steel tubular columns with binding bars under eccentric compression.

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“…Hence, in recent years, the RCFT columns have attracted considerable attention. Some researchers (Du et al [5], Herná n-dez-Figueirido et al [6], Lai et al [7], Lee et al [8], Long et al [9], Ding et al [10], Wang et al [11], Young et al [12], and Du et al [13]) used experimental and theoretical methods to study mechanical behavior in relation to normal RCFT columns.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Research on RCFT Beam-Columns Fabricated With Q420b High-Strength Steel Subjected to Eccentric Load

2020

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Mechanical behavior of stirrup-confined rectangular CFT stub columns under axial compression

Cited by 56 publications

References 18 publications

Numerical Study on Confinement Effect and Efficiency of Concentrically Loaded RACFRST Stub Columns

Numerical Study on Confinement Effect and Efficiency of Concentrically Loaded RACFRST Stub Columns

Local buckling of rectangular concrete-filled steel tubular columns with binding bars under eccentric compression

Experimental and Theoretical Research on RCFT Beam-Columns Fabricated With Q420b High-Strength Steel Subjected to Eccentric Load

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