Local and post-local buckling behavior of welded square high-strength steel tubes with concrete-infilled restraints

Sun, Lipeng; Liu, Yongjian; Wang, Haitao; Shi, Fengrong

doi:10.1016/j.tws.2022.110381

Cited by 12 publications

(4 citation statements)

References 29 publications

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“…Xu et al [11] proposed a novel anchor-rebarcolumn-foundation connection (SAC) tailored for CFST columns, and M. Ansari et al [12] undertook a numerical analysis of the performance of a rib stiffener steel beam connected to a circular CFST column under cyclic loading conditions. Additionally, Lei et al [13] introduced a novel fully welded concrete-filled integral K-joint with longitudinal preformed ribs to enhance fatigue performance, and Sun et al [14] delved into the local and post-local buckling behavior of welded square high-strength steel tubes with concreteinfilled restraints. Further contributions include Liu et al [15], who designed a T-shaped irregular CFST column by welding I-shaped and U-shaped steel components together and assessed their flexural stability under combined axial loads and moments.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

Cao,

Zhu,

Qian

et al. 2024

Buildings

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For this study, we conducted a detailed examination and comprehensive comparative analysis of the structural responses and mechanical behavior of bolted sleeve connections in precast circular semi-continuous steel tubular concrete (PCSCFST) columns. The research involved fourteen specimens, and we considered the impacts of various parameters, including eccentricity, external steel sleeve thickness, bolt diameter, and slenderness ratio. The findings revealed that the external steel sleeve significantly enhances the protection of the connection area, enabling the bolts to effectively withstand eccentric loads. However, sleeves that are too thick may lead to premature bolt failure, reducing their ultimate load-bearing capacity. Using bolts to transfer loads to the concrete significantly strengthens the restraining effect of the steel sleeve. Nonetheless, increasing the bolt diameter beyond a certain threshold may diminish this beneficial impact, potentially leading to connection failure and a decrease in ultimate load-bearing capacity. A new ‘cooperative value q’ measures component collaboration at ultimate capacity, showing that shorter columns offer less effective coordination than longer ones. Through regression analysis, we formulated a prediction for axial ultimate bearing capacity, closely aligning with the experimental data (Npre-a/Nu average value of 1.003, variance 0.00248). Three N–M curves, including the Eurocode 4 method, offered conservative predictions, with Eurocode 4 closely matching the experimental results. A refined prediction method following Eurocode 4 was developed, yielding an average Ppre-U/Pu value of 0.971 and a variance of 0.0107.

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Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

Cao,

Zhu,

Qian

et al. 2024

Buildings

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“…In general, analytical studies are utilized to reach the postbuckling strength for isotropic materials. [12][13][14][15][16] So that, it is a common way to follow the creation of Johnson-Euler curves and determine the buckling behavior of the members. Based on that curve, buckling and post-buckling with respect to slenderness ratio is drawn.…”

Section: Introductionmentioning

confidence: 99%

“…Due to isotropy, crippling calculations are easier in metallic structures. In general, analytical studies are utilized to reach the post‐buckling strength for isotropic materials 12–16 . So that, it is a common way to follow the creation of Johnson–Euler curves and determine the buckling behavior of the members.…”

Section: Introductionmentioning

confidence: 99%

“…Slenderness ratio is proportional with the length of the structure and considered to be related with the buckling behavior of the structures. To illustrate, Huang et al 14 and Sun et al 16 try to find the slenderness limits of the columns for steel having different properties and draw an Euler–Johnson curve for their structures. Accordingly, high slenderness ratio expresses that the failure mode is global buckling.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

Yıldırım,

Ünal

2023

Polymer Composites

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The post‐buckling strength, which is simply called as crippling, is investigated for laminated composite structures in this study. L profiles that had various stacking sequences of carbon fiber reinforced epoxies were tested. Three different layups configurations were used by changing flange‐to‐thickness ratios. The main objective of this research was to show that flange‐to‐thickness ratio was not the only effecting parameter for crippling. Therefore, a new parameter, EGY number, was developed by considering the positions of 0° and 45° plies. Depending on EGY number, a new semi‐empirical formulation was presented to calculate crippling strength of the laminated composite structures. One of the test results was employed to verification of EGY number. In addition, the test results were validated with finite element analyses. Static, Riks and Dynamic, Explicit computational results were compared to simulate the experiments.Highlights Determination of crippling strength both experimentally and theoretically. Comparison of numerical models: Static, Riks versus Dynamic, Explicit. Developing a new parameter called as EGY number. Developing of a new analytical semi‐empirical formula for crippling strength.

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Analyzing elastoplastic behavior and residual strength ratios in steel tubular braces under compression: a numerical investigation

Saffari,

Davoodi,

Soleymani

2024

Innov. Infrastruct. Solut.

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Local and post-local buckling behavior of welded square high-strength steel tubes with concrete-infilled restraints

Cited by 12 publications

References 29 publications

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

Analyzing elastoplastic behavior and residual strength ratios in steel tubular braces under compression: a numerical investigation

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