Resistance of special-shaped concrete-filled steel tube columns under compression and bending

Liu, Xianggang; Liu, Jiepeng; Yang, Haitian; Cheng, Guozhong; Lanning, Joel

doi:10.1016/j.jcsr.2020.106038

Cited by 44 publications

(6 citation statements)

References 23 publications

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“…where σ s and ε s are the stress and strain of the steel, respectively; f y and ε y are the yield stress and strain, respectively; E s is the elastic modulus; αE s is the stiffness at the hardening stage; and α and E s are recommended to be 0.01 and 200 GPa for steel, respectively [28].…”

Section: Model Setupmentioning

confidence: 99%

Study of the Seismic Behavior of Simplified RCS Joints via Nonlinear Finite Element Analysis

Li,

Wang,

Lin

et al. 2023

Buildings

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Compared to more complex structures, simply configured reinforced concrete column–steel beam (RCS) composite structures have more promising application prospects, especially in regions with moderate–high seismic levels, due to their ease of construction. However, the current understanding of the seismic performance of simplified RCS joints is not sufficient. Validated by experimental results, a nonlinear finite element analysis (FEA) model was developed in this study to reveal the seismic behavior of simplified RCS joints. Six vital design parameters, namely axial load ratio, concrete strength, yield strengths of steel webs and flanges, and diameters of transverse and longitudinal reinforcements, were comprehensively studied. Research has shown that the axial compression ratio has a significant impact on the failure mode and bearing capacity of joints. When the concrete strength increases, the load-bearing capacity of the joints significantly increases, while the brittleness of high-strength concrete leads to a decrease in its deformation capacity. In addition, when the steel beam strength is constant, higher flange and web yield strengths have a limited influence on crack propagation and strain development. The stirrup reinforcement ratio and longitudinal reinforcement ratio play a significant role in inhibiting crack propagation and improving the bearing capacity, respectively. With the help of the numerical results, six theoretical models introduced by national codes and other researchers were compared. Among them, the modified model proposed by Kanno demonstrated the highest accuracy and was the most suitable for simply configured RCS joints.

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Section: Model Setupmentioning

confidence: 99%

Study of the Seismic Behavior of Simplified RCS Joints via Nonlinear Finite Element Analysis

Li,

Wang,

Lin

et al. 2023

Buildings

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show abstract

“…Plasticity is employed in the software, and five parameters in this concrete constitution, describing its yield function and plastic flow procedure, are taken as following values: the dilation angle is 35°; the eccentricity is 0.1; the f b0 /f c0 is 1.16; the K is 0.667; the viscosity parameter is 0.0001 (Liu et al, 2018b(Liu et al, , 2020. The elastic modulus of concrete is calculated as formula ( 2):…”

Section: Materials Constitutive Models the Concrete Damagementioning

confidence: 99%

Research on seismic behavior of special-shaped CFST column to H-section steel beam joint

Cheng

Yang

et al. 2021

Advances in Structural Engineering

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To investigate the seismic behavior of joint between special-shaped concrete-filled steel tubular (CFST) column and H-section steel beam, a pseudo-static test was carried out on five specimens with scale ratio of 1:2. The investigated factors include stiffening types of steel tube (multi-cell and tensile bar) and connection types (exterior diaphragm and vertical rib). The failure modes, hysteresis curves, skeleton curves, stress distribution, and joint shear deformation of specimens were analyzed to investigate the seismic behaviors of joints. The test results showed the connections of exterior diaphragm and vertical rib have good seismic behavior and can be identified as rigid joint in the frames with bracing system according to Eurocode 3. The joint of special-shaped column with tensile bars have better seismic performance by using through vertical rib connection. Furthermore, a finite element model was established and a parametric analysis with the finite element model was conducted to investigate the influences of following parameters on the joint stiffness: width-to-thickness ratio of column steel tube, beam-to-column linear stiffness ratio, vertical rib dimensions, and axial load ratio of column. Lastly, preliminary design suggestions were proposed.

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“…Scholars have also introduced special-shaped columns made of steel tubes filled with concrete, aiming to further enhance the application of CFST columns in building structures. Extensive tests, theoretical studies and finite element analyses worldwide have explored the mechanical properties of L [ 10 , 11 ], T [ [12] , [13] , [14] ] and cross-shaped [ [15] , [16] , [17] , [18] , [19] ] CFST columns. These investigations consistently demonstrate the excellent load capacity and seismic performance of CFST special-shaped columns, with the cross section being particularly prevalent.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Yang,

Yu,

Qiu

et al. 2024

Heliyon

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Resistance of special-shaped concrete-filled steel tube columns under compression and bending

Cited by 44 publications

References 23 publications

Study of the Seismic Behavior of Simplified RCS Joints via Nonlinear Finite Element Analysis

Study of the Seismic Behavior of Simplified RCS Joints via Nonlinear Finite Element Analysis

Research on seismic behavior of special-shaped CFST column to H-section steel beam joint

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

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