The shear lag effects on welded steel single angle tension members

Hong, Zhu; Yam, Michael C.H.; Lam, Chi Chiu; Iu, Vai Pan

doi:10.1016/j.jcsr.2008.10.004

Cited by 17 publications

(8 citation statements)

References 3 publications

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“…To model steel structural elements, the stress-strain engineering relationship must be used. The engineering stress-strain relationship and elastic modulus of the steel elements, which are measured experimentally by tension tests, are acquired from a previously published work [7]. The average engineering stress-strain relationship of the tension test results [7] is applied to FE modeling, as shown in Table 1, with elastic modulus is set to 203 GPa, and a Poisson's ratio of 0.3 is applied [20][21][22].…”

Section: Steel Modelling and Characteristicsmentioning

confidence: 99%

“…Numerical FE analysis is carried out on fifty steel single-angle members with variable geometrical dimensions and different end deformations, where the deformations are controlled in the two directions perpendicular to the load axis. Two specimens of unequal single angles with dimensions of 125×75×10 (denoting long leg length × short leg length × thickness in millimeters) are set as control specimens to verify the FE results with the experimental results in a previously published work [7], as shown in Figure 2. For the control specimens, the end deformations are set such that no deformations occurred at the fixed end in any direction, and at the loading end, no deformations occurred in the directions of the axes perpendicular or parallel to the direction of the unconnected angle leg, as shown in Figure 2.…”

Section: Numerical Specimen Studiesmentioning

confidence: 99%

“…The existence of this unconnected leg, whether short or long, in steel angles or channels significantly affects the stress distribution, ultimate load capacity, and mechanical response of steel structures [7,8]. Because of the behaviour of such sections, numerical [9][10][11] and experimental studies [12][13][14] in this field have intensified over the past two decades.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Single-Angle Steel Member Under Tension Force with Different End Deformations

Sayed

2020

Civ Eng J

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Steel members with a single-angle cross-section are widely used, but some of their behaviours under loads are not considered by design codes, necessitating related research. This study is carried out on fifty steel single-angle members focused on the stress distribution behaviour and the ultimate axial load capacities under different end deformations through 3-dimensional Finite Element (FE) simulations and comparison with previous experimental findings. FE modeling is capable of modeling steel structures with high accuracy. Based on the results, the length of the angle affects neither the shape of the stress distribution nor the ultimate load capacity of the element. The end deformations affect the stress distribution on the member angle cross-section, including the ultimate load capacity. The end deformations which restricted deformations in the two directions perpendicular to the load axis are found to be optimal, with an average increase in load capacity by a factor of 1.96 for an equal angle and 2.21 for an unequal angle compared with the capacities calculated for single angles with deformations allowed in all directions. The appearance of a compression zone on the unconnected angle leg reduces the ultimate load capacity. The current design code (ANSI/AISC-360) can be adopted to calculate the ultimate load in the case of no deformation in the y-axis direction and no deformations in the x- and y-axis directions where the mean ratios of PNum/Pcode are 1.24 and 1.34 respectively. However, the code does not agree with the end deformations of free deformations and no deformation in the x-axis direction for either equal or unequal angles where the mean ratios of PNum/Pcode are 0.64 and 0.79 respectively, which is unsafe.

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Section: Steel Modelling and Characteristicsmentioning

confidence: 99%

Section: Numerical Specimen Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Single-Angle Steel Member Under Tension Force with Different End Deformations

Sayed

2020

Civ Eng J

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“…Humphries and Birkemoe [7] showed that the equations presented in the Canadian steel standard for the shear lag were generally conservative. Zhu et al [8] conducted 13 angle tests with welded connections. Based on the test results, both the ultimate loads sustained by the short leg connected angles and the ductility of all the angle specimens were greater when the balanced weld arrangement was used in the connections.…”

Section: Introductionmentioning

confidence: 99%

Shear Lag Effects in Angles Welded at Both Legs

Abedin

Maleki

Kiani

et al. 2019

Advances in Civil Engineering

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The shear lag phenomenon is known to reduce the tensile capacity of tension members. There are various parameters affecting shear lag that have not been considered before. In addition, previous studies have been conducted mainly on single steel sections. Using numerical methods, the present study investigates the effects of relevant parameters on shear lag in single- and double-angle sections welded at both legs. The studied parameters are connection eccentricity, connection length, gusset plate thickness, member-free length, and connection-free length. The results of the numerical analyses show that, in single-angle connections, the effects of connection length, connection eccentricity, and gusset plate thickness are more pronounced, while in double-angle connections the last parameter is not very critical. Comparing the results with the AISC-LRFD predictions, it is concluded that the specification relations are conservative in most cases. In order to reduce the overconservatism, some new equations for shear lag estimate are introduced.

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“…Vlasov [3] developed the theory of thin-walled elastic beams, which is the basis of modern theoretical models to analyze box girders. Since then, many studies [4][5][6][7][8][9][10][11] focused on shear lag of thin-walled box girders in simply supported beams or continuous beams under concentrated and uniform loads. Several experimental studies have been conducted to evaluate the behavior of box girders.…”

Section: Introductionmentioning

confidence: 99%