A unified approach to evaluate axial force-moment interaction curves of concrete encased steel composite columns

Lai, Binglin; Liew, J.Y. Richard; Hoang, An Le; Xiong, Ming‐Xiang

doi:10.1016/j.engstruct.2019.109841

Cited by 33 publications

(4 citation statements)

References 32 publications

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“…( 10) and illustrated in Fig. 15, with θ = 0° and 90° corresponding to the cases of pure bending and pure compression respectively; a similar approach has been adopted in a number of previous studies, such as [44,45].…”

Section: Assessment Of Ec3 Design Rulesmentioning

confidence: 99%

Stability and design of normal and high strength steel CHS beam-columns

Meng

Gardner

2022

Engineering Structures

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Section: Assessment Of Ec3 Design Rulesmentioning

confidence: 99%

Stability and design of normal and high strength steel CHS beam-columns

Meng

Gardner

2022

Engineering Structures

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“…They developed a design approach for shear and flexure interaction of axially loaded beams. Lai et al (2019) [12] assessed axial force-moment interaction of concrete encased steel columns made of a range of concrete and steel grades. They collected from the literature experimental tests covering steel yield strength ranging from 280 MPa to 913 MPa and concrete strength ranging from 20 MPa to 104 MPa.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that the EC4 method yields un-conservative values. Lai et al (2019) [12] also presented a simple method to calculate the strength of composite columns under axial compression and bending. This general method is given here for comparison purpose.…”

Section: Introductionmentioning

confidence: 99%

Shear strength evaluation in the existance of axial compressive loads for reinforced concrete beams

Issa

El-Abbasy

2021

HBRC Journal

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Response-2000 is a program developed to calculate the shear capacities of beams and columns under any combinations of shear, moment, and axial loads. It is based on the modified compression field theory. The capabilities of the program Response-2000 to obtain shear strength capacities in the existence of axial compressive loads are demonstrated. The comparison with the experimental tests proved that the program gives good estimate for the failure shear in this case. The shear provisions of the Egyptian reinforced concrete code (ECP203-2017) are also evaluated against the experimental results. It is found that the accuracy of the obtained results using Rseponse-2000 is better than those obtained using the shear equations of the Egyptian reinforced concrete code (ECP203-2017). The program Response-2000 is then used to generate 336 results for 7 different cross-sections considering different concrete compressive strengths, transverse reinforcement, and values of axial loads. These generated results along with 33 experimental results for other 7 cross-sections are used to develop a new formula for the shear strength capacity in the existence of axial compressive loads. This formula is found to give better results when verified against experimental data.

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“…Next, Lai et al (2019a) proposed a unified approach to evaluate strength interaction diagram of CES columns which made of different concrete and steel grade. The compressive strength of concrete varies from 20 to 104 MPa and the yield stress of structural steel varies from 280 to 913 MPa.…”

Section: Concrete-encased Steel Columnsmentioning

confidence: 99%

Strength analysis of concrete-encased cellular steel columns

Anuntasena

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This research investigates the compression behavior of bare cellular steel columns and concrete-encased cellular steel (CECS) columns subjected to concentric and eccentric loadings. First, the experimental study of the cellular steel and CECS columns was conducted in the laboratory. For the cellular steel columns subjected to concentric loading, the failure mode of the bare cellular steel columns was local buckling at both web and flanges at the hole section. All cellular steel columns exhibited yielding and hardening behavior. The cellular columns had the average yield loads less than the parent column by 15 %. For the CECS and CES columns subjected to concentric loading, the failure mode and load deformation relationships were similar with the CES columns having a similar stirrup spacing. The failure of CECS and CES columns in this research was cover concrete spalling and buckling of the longitudinal rebars at the maximum loads. The CECS columns had the averaged maximum loads less than the CES column by 3 6 %. For the cellular steel columns subjected to eccentric loading, the failure mode was local buckling at compression web and flange at the hole section. The cellular columns had the yield loads slightly less than the parent column by 4 % for large eccentricity in this research. For the CECS and CES columns subjected to eccentric loading, the failure mode was concrete crushing at compression side at mid-height at the maximum loads followed by the failure of concrete at tension side. Second, the analytical models were proposed to predict the load strain relationships of the cellular steel columns and CES columns. In addition, the equations were proposed to predict the yield load�and axial stiffness�of the cellular steel columns and the maximum loads and axial stiffness of the CECS columns. Finally, the plastic stress distribution and modified AISC 360-16 methods for the strength interaction diagram of the cellular steel and CECS columns were proposed. The proposed strength interaction diagrams show that the cellular and CECS columns had higher strength than the parent columns at high load�eccentricity.

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A unified approach to evaluate axial force-moment interaction curves of concrete encased steel composite columns

Cited by 33 publications

References 32 publications

Stability and design of normal and high strength steel CHS beam-columns

Stability and design of normal and high strength steel CHS beam-columns

Shear strength evaluation in the existance of axial compressive loads for reinforced concrete beams

Strength analysis of concrete-encased cellular steel columns

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