Influence of shear lag coefficienton circular hollow sections with bolted sleeve connections

Roquete, Lucas; Sarmanho, Arlene Maria Cunha; Mazon, Ana Amélia Oliveira; Requena, João Alberto Venegas

doi:10.1590/0370-44672014700220

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…The results indicated that net section efficiencies attained in the tests were much higher than those prescribed by the design specifications. Moreover, recent studies [28,29] have shown that the negative effects developed by the shear lag in slotted end connections to hollow structural sections (HSS) may be negligible if a minimum weld length (Lw) more that the distance between welds (w) is used. As a result, the failure mode in the connections with the ratio of L w /w≥1.0 is mainly section fracture rather than failure in the connection.…”

Section: Introductionmentioning

confidence: 99%

Net Section Fracture Assessment of Welded Rectangular Hollow Structural Sections

et al. 2020

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Rectangular Hollow Sections (RHS) because of their high resistance to tension, as well as compression, are commonly used as a bracing member with slotted gusset plate connections in steel structures. Since in this type of connection only part of the section contributes in transferring the tensile load to the gusset plate, shear lag failure may occur in the connection. The AISC specification decreases the effective section net area by a factor to consider the effect of shear lag for a limited connection configuration. This study investigates the effective parameters on the shear lag phenomenon for rectangular hollow section members connected at corners using a single concentric gusset plate. The results of the numerical analysis show that the connection length and connection eccentricity are the only effective parameters in the shear lag, and the effect of gusset plate thickness is negligible because of the symmetric connection. The ultimate tensile capacity of the suggested connection in this study were compared to the typical RHS connection presented in the AISC and the similar double angle sections connected at both legs. The comparison indicates that tensile performance of the suggested connection in this study because of its lower connection eccentricity is much higher than the typical slotted connection and double angle connections. Therefore, a new equation is suggested based on the finite element analyses to modify the AISC equation for these connections.

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Section: Introductionmentioning

confidence: 99%

Net Section Fracture Assessment of Welded Rectangular Hollow Structural Sections

et al. 2020

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“…This connection is composed of outer tubes connected by an inner tube and bolts. Ini-tially, the sleeve connection was studied for circular hollow sections (CHS) by Amparo (2014), Amparo et al (2015), Roquete et al (2017), Roquete (2018), Oliveira (2019), Oliveira et al (2020), Roquete et al (2021) and Roquete et al (2022). Figure 1 shows an example of sleeve connection with CHS evaluated by Roquete (2018).…”

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Numerical and theoretical investigation of bolted sleeve connections with rectangular hollow sections

et al. 2023

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This article presents a theoretical and numerical study of bolted sleeve connections with rectangular hollow sections (RHS) under axial tension and compression. The geometric form of a hollow section provides resistance for high axial loads, torsion and combines effects, spreading its utilization in truss systems. In this context, the sleeve connections proposed explore these characteristics of RHS and offer an attractive aesthetic appearance for the continuity of elements. The bolted sleeve connection with RHS is formed by two outer tubes connected by an inner tube and staggered bolts. Herein, a parametric study was developed for identification of the failure modes in the connection. Finite element models with different geometric parameters and number of bolts were created in commercial software. The width, depth and thickness of RHS tubes and diameter of bolts were variated. In the theoretical/numerical/ parametric results, the yielding gross section failure, the fracture through the effective net area failure and the bearing failure were observed. These failure modes occurred in both outer and inner tubes. The load results were compared to determine the resistance capacity of sleeve connections. The theoretical formulations were evaluated for representation of the ultimate load of the failure modes.

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“…The shear lag coefficient was also approached by Roquete et al (2017b), who analyzed two bolt configurations: aligned and crossed bolts. Experimental results of 12 prototypes with a variable number of bolts -3, 4 and 5 bolts -, bolt configurations, diameters and thicknesses of the tubes were undertaken, and its shear lag coefficients obtained.…”

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confidence: 99%

Bearing failure in bolted sleeve connections with circular hollow sections under compression

et al. 2020

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This article analyzes sleeve connections between circular hollow sections. This type of connection is composed of two tubes connected by bolts to an inner tube with a smaller diameter, and explores the efficiency, aesthetics and resistance of hollow sections subjected to tension and compression. In previous researches, sleeve connections with aligned and crossed bolt dispositions and under axial tension were studied. Herein, the behavior of sleeve connections with aligned bolts and under compression was analyzed. A model to represent the connection using the finite element method was developed, which allowed a numerical analysis with geometric property variations. In the numerical/parametric results, bearing failure was observed in all cases, either in the outer or inner tube. Limiting the number of bolts to 6 and considering that connections have a lower outer thickness than the inner tube, a formulation was proposed to determine the ultimate bearing capacity of sleeve connections under compression and with bearing failure.

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Influence of shear lag coefficienton circular hollow sections with bolted sleeve connections

Cited by 5 publications

References 2 publications

Net Section Fracture Assessment of Welded Rectangular Hollow Structural Sections

Net Section Fracture Assessment of Welded Rectangular Hollow Structural Sections

Numerical and theoretical investigation of bolted sleeve connections with rectangular hollow sections

Bearing failure in bolted sleeve connections with circular hollow sections under compression

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