Experimental and numerical investigation of eccentrically loaded laced built-up steel columns

Combined-section columns composed of two separate steel sections present an ideal and economic design for long columns subject to high values of bending moments and axial forces. Research dealing with design of these columns is currently insufficient. At present, most codes of practice consider each column's component to behave either separately or rigidly connected to the other components. As such, the main objective of this research is to scrutinize the behaviour of laced-section columns which are subjected to eccentric loading and propose design criteria for them. In this paper, a non-linear numerical model for these columns is developed based on the finite element method. The results of the numerical model are first verified against the outcomes of experimental investigations available in literature. Then, the model is adopted to simulate the behaviour and the capacity of the combined laced columns. The numerical model includes both the geometric and materials nonlinearities along with the effect of initial imperfections.

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“…The numerical model is verified with the results of experimental investigation program obtained byKalochairetis et. al (2014).…”

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confidence: 69%

Numerical Analysis of Combined-Section Steel Columns

Iskander

George

Ahmed

et al. 2018

Journal of Al-Azhar University Engineering Sector

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“…7. The engineering stress-strain curve is taken from the study of Kalochairetis et al [49] by a quasi-static experimental test considering the length and the initial cross sectional area of the specimen; instead the true stress-strain curve is obtained analytically by assuming logarithmic strains [48]. Furthermore, a fracture criterion is implemented without taking into account the effect of the stress triaxiality; the fracture occurs when the effective plastic strain reaches the value 0.2473 corresponding to the maximum resisting stress before softening.…”

Section: Validation Of the Ssm By The Finite Element Modelmentioning

confidence: 99%

Simplified fragility-based risk analysis for impulse governed blast loading scenarios

Olmati

Petrini

Vamvatsikos

et al. 2016

Engineering Structures

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“…Some experimental studies were carried out to verify non-linear analytical techniques. Kalochairetis et al (2014), Yang et al (2018, 2019), Chen (2007) and Chen et al (2020) tested the ultimate capacity and behaviour of two-legged, three-legged and four-legged laced latticed columns, respectively. The corresponding experimental results validated the accuracy of non-linear analytical techniques.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on ultimate strength of four-legged latticed columns

Liu

et al. 2021

Advances in Structural Engineering

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Latticed built-up columns are applied more extensively than solid columns in structural engineering because of their excellent load-carrying capacity and light weight. Studies on the bearing capacity of latticed columns, particularly multiple-legged latticed columns, need to be conducted in detail. In this investigation, seven four-legged latticed column specimens of different bar sections, bar distributions and loading eccentricities under compressive loads were subjected to experimental tests. The initial geometric imperfections of the legs and bars were measured and introduced into the FE numerical method. The experimental results were then compared with those of Geometrical and Material Non-Linear Analysis with Imperfection in ABAQUS software. The combined data indicate that the bar section, bar distribution and loading eccentricity significantly influenced the ultimate strength of four-legged latticed columns, producing maximum variations of 105.67%, 65.7% and 48.48%, respectively. This investigation demonstrates the influence of lacing bars and improves the results obtained from FE numerical analytical techniques.

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Experimental and numerical investigation of eccentrically loaded laced built-up steel columns

Cited by 22 publications

References 30 publications

Numerical Analysis of Combined-Section Steel Columns

Numerical Analysis of Combined-Section Steel Columns

Simplified fragility-based risk analysis for impulse governed blast loading scenarios

Experimental and numerical investigation on ultimate strength of four-legged latticed columns

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