Effect of fillet welds on T-joints with thin-walled chords

Pereira, Daniel José Rocha; Sarmanho, Arlene Maria Cunha; Nunes, Gabriel Vieira; Guerra, Messias Júnio Lopes; Alves, Vinicius

doi:10.1680/jstbu.18.00043

Cited by 5 publications

(2 citation statements)

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“…In the modeling, the prototypes were simulated through the element SOLID 185 – full integration, which contains eight nodes and three degrees of freedom associated with the translations in the nodal directions. This element has plasticity, stress stiffening, large deflection, and extensive strain capabilities, and has been used by other authors in the study of T-joints, such as Pereira et al (2018) and Bu and Packer (2020). The inner chord’s corner radius was considered 1.0 t 0 , and the outer 2.0 t 0 , according to the characteristics of the experimental tubes.…”

Section: Numerical Modelmentioning

confidence: 99%

Experimental and numerical assessment of CHS-RHS T-joints with chords subjected to axial tensile forces

Neto

Nunes

Sarmanho

et al. 2021

Advances in Structural Engineering

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Hollow steel sections are widely used in the construction industry due to their mechanical properties. Joints used in these structures are the subject of research because of their singular and critical behavior. Joints containing chords with more slender cross-sections and axially loaded are still a challenge for design, especially in joints with circular hollow sections (CHS) in the braces and rectangular hollow sections (RHS) in the chords. In this context, this work aimed to study joints formed by a combination of CHS braces subjected to compression loads and RHS chords axially loaded with tension, welded as T-joints. Experimental tests, a numerical model using finite elements, and a parametric analysis were developed. A new equation for the chord stress function was proposed, including joints containing chords with semi-compact sections in tension. The joint resistance values obtained through the numerical models were compared with the equations from ISO 14346:2013 and with the proposed equation. It was observed that, for the numerical models with geometric properties inside the normative validity ranges of ISO 14346:2013, the mean rate of analytical by numerical joint resistance results was equal to 68%, using either the normative or the proposed equation. In the same way, for models outside the current validity ranges, either the proposed equation or the modified equation from ISO 14346:2013 could be used to design CHS-RHS T-joints with the geometric and material properties analyzed.

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Section: Numerical Modelmentioning

confidence: 99%

Experimental and numerical assessment of CHS-RHS T-joints with chords subjected to axial tensile forces

Neto

Nunes

Sarmanho

et al. 2021

Advances in Structural Engineering

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“…The joint resistance can be determined by the deformation limit criterion, proposed by Lu et al (1994), verified for cold-formed steel sections by Zhao (2000), and used in recent research regarding tubular T-joints (Gomes et al, 2019;Lima et al, 2018;Pereira et al, 2019). It consists of determining the joint resistance according to the load equivalent to a 3% chord face deformation (N 3% ).…”

Section: Joint Resistancementioning

confidence: 99%

Effect of chord length on CHS-RHS T-joints with slender sections

et al. 2021

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The chord length is an essential geometric property that must be defined in the analysis of isolated joints composed of hollow steel sections, as well as the boundary conditions of the test. The analysis of these parameters' effect on the behavior of joints has been addressed by other studies, mostly with joints between circular hollow sections with compact or semi-compact cross-sections. Recent research about tubular joints has addressed cases with slender sections, where the design of joints containing these sections is still in development. In this context, this study aimed to evaluate the effect of the chord length in the behavior of T-joints between circular hollow section braces and slender rectangular hollow section chords through experimental tests and a numerical study considering the application of axial compression at the braces. The joint behavior was examined through the load-strain and load-deformation curves and the von Mises stress distribution, which allowed the failure mode's determination and the joint resistance value. Chord face failure was observed in the prototypes. It was concluded that a minimum chord length of 0.6m would be the adequate value for the study of the T-joints containing the geometric properties used in this study, which would be equivalent to a chord length five times higher than the width of the crosssection (5b 0 ).

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