Influence of tensile chord stresses on the strength of circular hollow section joints

Lipp, Andreas; Ummenhofer, Thomas

doi:10.1002/stco.201410017

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Additionally, Lipp and Ummenhofer (2014) based on experimental and numerical results as well, proposed a new chord load function for CHS joints subjected to tensile chord stresses reducing the joint resistance.…”

Section: Latin American Journal Of Solids and Structures 12 (2015) 21mentioning

confidence: 99%

Resistance and Elastic Stiffness of RHS "T" Joints: Part II - Combined Axial Brace and Chord Loading

Matos

Costa-Neves

Lima

et al. 2015

Lat. Am. j. solids struct.

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This paper deals with the behaviour of welded "T" joints between RHS sections submitted to tension brace loading combined with chord axial loading. In the companion paper (part I) a finite element model and a study without axial load in the chord, focusing on the joint behaviour as a function of the significant geometrical variables, were presented. In this part II paper, tension loading on the brace is incremented up to the joint failure, but is combined with different chord load levels in tension or compression, that are kept constant for each case. The same geometries and geometric variables as in the companion paper are used, and therefore the influence of these features together with the chord load level (in tension or compression) on the connection's response is evaluated. The force-displacement curves from the different geometries and chord load levels are analysed and compared, with a special attention on the influence of the chord load on the joint resistance and stiffness. Finally, a comparison of the numerical results with the Eurocode 3 (2005) and the newer ISO 14346 (2013) provisions is presented and discussed.

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Section: Latin American Journal Of Solids and Structures 12 (2015) 21mentioning

confidence: 99%

Resistance and Elastic Stiffness of RHS "T" Joints: Part II - Combined Axial Brace and Chord Loading

Matos

Costa-Neves

Lima

et al. 2015

Lat. Am. j. solids struct.

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“…The adoption of these CIDECT design guide for RHS joints [10] and ISO 14346 [8] preconize some joint resistance reduction for both cases, i. e., tensile and compressive chord stresses. Additionally Lipp and Ummenhofer [11] based on experimental and numerical results, proposed a reduction of the CHSjoint design capacity to consider the presence of tensile chord loads. These were the main motivations for the present investigation that involved experiments, and numerical simulations centred on the influence of tension and compression chord stresses over RHS chord to SHS braces T-joints ( [12], [13]).…”

Section: Tubular T-joints -Chord Stress Influencementioning

confidence: 99%

Recent advances in tubular joints experiments in Brazil

et al. 2018

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Dedicated to Prof. Dr.‐Ing. habil. Joachim Lindner on the occasion of his 80th birthday The aesthetical and structural advantages of tubular structural elements sustained the increase in their use in Brazil in last decades. The joints between tubular members remain a critical issue, with many studies indicating that further research is still needed, particularly for some geometries. In the past, some experiments on the influence of the chord stresses over the brace load capacity were published, but a definitive answer to this design issues was not reached. The first part of this paper presents an experimental evaluation centred on the effect of tension and compression chord stresses over RHS chord to SHS braces T‐joints. The results showed that compressive chord stresses could considerably reduce the joint resistance. In contrast, when tension chord stresses are applied the joint resistance increases but this is still not considered in the design codes. Still considering the tubular joints structural behaviour, there are cases where the ultimate resistance of the tubular joints may be enhanced by using flange plates as reinforcement, instead of replacing the chord or braces with stronger sections. Bearing this scenario in mind, the second part of this paper presents some experimental results of SHS T‐joints reinforced with flange plates to achieve a more economical design. The results showed that the joint resistance could be increased about 88 % using the reinforced plate with the same thickness of the chord profile.

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“…The variety of structural loads that could appear in a truss system with hollow sections can lead to different load combinations involving chord tension or compression. These loads can significantly alter the load-bearing capacity of welded joints in these trusses (Lipp and Ummenhofer, 2014; van der Vegte et al, 2002).…”

Section: Introductionmentioning

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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Influence of tensile chord stresses on the strength of circular hollow section joints

Cited by 10 publications

References 4 publications

Resistance and Elastic Stiffness of RHS "T" Joints: Part II - Combined Axial Brace and Chord Loading

Resistance and Elastic Stiffness of RHS "T" Joints: Part II - Combined Axial Brace and Chord Loading

Recent advances in tubular joints experiments in Brazil

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

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