Strength and ductility performance of concrete-filled steel tubular columns after long-term service loading

Liu, Hui; Wang, Yongxiang; He, Min; Shi, Yongjiu; Waisman, Haim

doi:10.1016/j.engstruct.2015.06.024

Cited by 41 publications

(8 citation statements)

References 36 publications

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“…However, there was an error between the results with or without the bond-slip and the experimental values due to the difference between the RPC constitutive relationship curve and the actual value. The dilatancy angle, eccentricity, the ratio of initial equibiaxial compressive yield stress to initial uniaxial compressive yield stress, the ratio of the second stress invariant on the tensile meridian, and viscosity coefficient were set as 30°, 0.1, 1.16, 0.6667 and 0.0005, respectively [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Thus, the bond-slip constitutive relationship between the section steel and RPC was not accurate.…”

Section: Experimental Simulation Of Steel-reinforced Reactive Powder Concrete Beams Under Bendingmentioning

confidence: 99%

Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip

Guo

Duan

2021

Materials

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In this study, based on the concrete damaged plasticity (CDP) model in the ABAQUS software, various plastic damage factor calculation methods were introduced to obtain CDP parameters suitable for reactive powder concrete (RPC) materials. Combined with the existing tests for the bending performance of steel-reinforced RPC beams, the CDP parameters of the RPC material were input into ABAQUS to establish a finite element model considering the bond and slip between the steel and RPC for numerical simulation. The load-deflection curve obtained by the simulation was compared with the measured curve in the experiment. The results indicated that on the basis of the experimentally measured RPC material eigenvalue parameters, combined with the appropriate RPC constitutive relationship and the calculation method of the plastic damage factor, the numerical simulation results considering the bond-slip were in good agreement with the experimental results with a deviation of less than 10%. Thus, it is recommended to select a gentle compressive stress-strain curve in the descending section, an approximate strengthening model of the tensile stress-strain curve, and to use the energy loss method and Sidoroff’s energy equivalence principle to calculate the RPC plastic damage parameters.

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Section: Experimental Simulation Of Steel-reinforced Reactive Powder Concrete Beams Under Bendingmentioning

confidence: 99%

Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip

Guo

Duan

2021

Materials

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“…e experimental results were compared using the FE model developed using ABAQUS. After several trials, the angle of Advances in Civil Engineering friction was taken as 50°, flow stress ratio as 1, and dilation angle was taken as 30° [8] to simulate the actual behavior. e coefficient of friction between steel and concrete is taken as 0.6 [3].…”

Section: Analytical Investigationmentioning

confidence: 99%

“…8-noded brick elements (C3D8) with 24 DOFs are used for the modeling of concrete core, and 4-noded shell element (S4R) [9] with 6 DOF is used for modeling of steel. Poisson's ratio for concrete is taken as 0.2 and that of steel is taken as 0.3 [8]. Displacement degrees of freedom in all three directions (U1, U2, and U3) and rotational degrees of freedom in all three directions are restrained to be zero at bottom.…”

Section: Analytical Investigationmentioning

confidence: 99%

Study on the Bond Strength of Steel‐Concrete Composite Rectangular Fluted Sections

Varma

Henderson

2020

Advances in Civil Engineering

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Concrete-filled steel tube (CFST) sections are structural members that effectively use the best properties of steel and concrete. Steel tube at the outer perimeter effectively resists tension and bending moments and also increases the stiffness of the section as steel has a high modulus of elasticity. The infilled concrete delays the local buckling of the thin outer steel tube. The interface bond strength plays a major role in the composite action of CFST sections. Provision of rectangular flutes on steel tube on CFST sections will improve the bond failure load and thereby the performance of CFST sections significantly. In this paper, the bond strength and displacement characteristics of steel-concrete composite sections are determined by incorporating rectangular shaped flutes into the steel tube. A total of five sections were tested to assess the influence of flutes on the bond strength. These tested sections are analyzed and are used to develop a finite element model using the finite element software ABAQUS version 6.13. The parameters chosen for the FE study are (i) type of flutes (outward and inward), (ii) D/t ratio (40, 60, and 80), (iii) number of flutes (2, 3, 4, 5, and 6), and (iv) dimension of flutes ((20 mm × 10 mm), (40 mm × 10 mm), and (60 mm × 10 mm)). Bond failure load is found to be higher for outward fluted sections compared to inward fluted and plain CFST sections.

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“…Ichinose et al [10] also reported a series of similar tests to obtain creep coefficients. Naguib and Mirmiran [11] and Liu et al [12] developed an algorithm for the time-dependent behavior of CFST using the rate of flow method and the double power law functions for the creep of concrete. Shrestha and Chen [13] worked on the aging and creep coefficients of confined concrete, but the effect of steel tube was excluded in their formulas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Concrete Age and Creep on the Behavior of Concrete-Filled Steel Tube Columns

Wang

Zha

Feng

2016

Advances in Materials Science and Engineering

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The influence of concrete age and creep on the ultimate axial loading capacity of concrete-filled steel tube (CFST) columns is experimentally and numerically investigated. After validation of numerical models, a parametric study is conducted and the results are used to formulate empirical formulas for predicting the ultimate axial load-bearing capacity of the columns. Formulas are also proposed for predicting both the composite creep and aging coefficients of the CFST columns, which consider the confinement action of steel tubes on concrete. Then, the proposed formulas are validated independently by comparing their predictions with existing test results performed by other researchers. The comparisons show that the empirical formulas have the potential to be used in the practical design of CFST columns.

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Strength and ductility performance of concrete-filled steel tubular columns after long-term service loading

Cited by 41 publications

References 36 publications

Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip

Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip

Study on the Bond Strength of Steel‐Concrete Composite Rectangular Fluted Sections

Effect of Concrete Age and Creep on the Behavior of Concrete-Filled Steel Tube Columns

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