Equivalent geometrical imperfections for local and global interaction buckling of welded square box section columns

Radwan, M.; Kövesdi, Balázs

doi:10.1016/j.istruc.2023.01.045

Cited by 10 publications

(11 citation statements)

References 27 publications

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“…3. The previously developed and validated numerical model is used, as shown in the previous research [10], where this numerical model was validated for both NSS and HSS against tests in the literature.4. The numerical model and the combinations of imperfections and residual stresses are used to perform a parametric study to determine the accurate resistance (referred to as reference resistance) for a wide range of global and local slenderness ratios for steel grades of S500, S690, and S960.…”

Section: Executed Research Strategymentioning

confidence: 99%

“…In this research, it was found that a mesh of 16 elements along the plate width results in a reliable estimation of the resistance with 1% from the smallest applied mesh size. The details of the mesh analysis are illustrated in previous research [10]. Validation of the numerical model is a process of comparing the results obtained from numerical simulation with those obtained from physical experiments.…”

Section: Executed Research Strategymentioning

confidence: 99%

“…It is essential to ensure the accuracy and reliability of the developed numerical model and its ability to predict the behavior of the test specimen. The details of the validation process of the numerical model are demonstrated in previous research [10], where the model was validated for both NSS and HSS using samples taken from several research programs with S235, S500, S700, and S960 steel types. The numerical model was able to estimate the buckling capacity of the test specimens accurately.…”

Section: Executed Research Strategymentioning

confidence: 99%

“…Equivalent global imperfections suitable for GMNIA analysis were recently developed by Somodi et al [9] for global buckling resistance. For interaction buckling, the authors developed equivalent imperfection combinations for welded square box-sections made of normal strength steel (NSS) [10]. However, several researchers emphasized the difference between normal and high-strength steel, such as residual stresses and material behavior [11].…”

Section: Introductionmentioning

confidence: 99%

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Imperfections for Local and Global Interaction Buckling of Welded Square High-strength Steel Box-section Columns

Radwan

Kövesdi

2023

Period. Polytech. Civil Eng.

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The interaction behavior between local and global buckling modes in high-strength steel box-section columns has received limited research attention. Currently, there is a lack of a validated equivalent geometric imperfection that can be effectively employed in nonlinear plastic analysis to estimate the interaction buckling resistance. This research aims to find equivalent geometric imperfections that can be used in geometrical and materially nonlinear analysis using imperfections (GMNIA) to estimate the interaction buckling resistance of square welded box-section columns made of high-strength steel. It extends prior investigations by the authors on equivalent imperfections for normal-strength steel welded box-sections. A developed and validated numerical model is used to perform parametric studies to estimate the accurate buckling capacity using previously developed and verified combinations of imperfections and residual stresses. The accurate buckling capacities are used to calibrate equivalent local and global imperfection combinations that can be used in FEM-based design. A reliability assessment study is also performed to check the safety level of the proposed imperfection combinations.

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Section: Executed Research Strategymentioning

confidence: 99%

Section: Executed Research Strategymentioning

confidence: 99%

Section: Executed Research Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Imperfections for Local and Global Interaction Buckling of Welded Square High-strength Steel Box-section Columns

Radwan

Kövesdi

2023

Period. Polytech. Civil Eng.

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“…Пренебрежение местными несовершенствами формы ребер жесткости приводит к завышению жесткости пластин. № 2 (112) 2024 Для сварных колонн коробчатого сечения комбинации несовершенств, касающиеся изгибной формы потери устойчивости элемента и местной потери устойчивости пластин (частей) сечения, были исследованы в работе [30]. Исследование показало, что всегда безопаснее использовать полные значения как глобальных, так и локальных несовершенств, что приводит к снижению несущей способности в среднем на 3-4 % по сравнению с наиболее точным решением.…”

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Imperfections for the calculation of steel structures by the finite element method. Part 1

Nadolski

2024

jour

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It is well known that imperfections are always present in structural elements. Imperfections can significantly affect the behavior and bearing capacity of steel structures, especially in the case of stability-related tasks. Therefore, inconsistencies must be taken into account in the loadbearing capacity model and their correct application (setting the shape and value) is a key point in the numerical analysis process. In recent decades, much attention has been paid in the domestic scientific space to updating imperfection models for use in numerical models, including taking into account modern more accurate manufacturing and installation technologies for steel structures. The purpose of this study is an analytical review and analysis of scientific research and technical literature, followed by synthesis and elaboration of recommendations on imperfections in relation to the calculation of steel structures using computer modeling technology, including the finite element method. The results of the study contain instructions on how to set the shapes and values of imperfections for different groups of imperfections. The article consists of two parts. The first part is devoted to the study of geometric imperfections, residual stresses and rules for the combination of imperfections, the second part of the article is devoted to equivalent imperfections.

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Minimum design bending moment for systems of equivalent stiffness

de Macêdo Wahrhaftig,

Plevris,

Abdullah Mohamad

et al. 2023

Structures

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Equivalent geometrical imperfections for local and global interaction buckling of welded square box section columns

Cited by 10 publications

References 27 publications

Imperfections for Local and Global Interaction Buckling of Welded Square High-strength Steel Box-section Columns

Imperfections for Local and Global Interaction Buckling of Welded Square High-strength Steel Box-section Columns

Imperfections for the calculation of steel structures by the finite element method. Part 1

Minimum design bending moment for systems of equivalent stiffness

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