The component ‘lateral faces of RHS’ under compression at ambient and high temperature

López‐Colina, Carlos; Serrano, Miguel A.; Gayarre, Fernando López; Gonzalez, J Castello

doi:10.1007/s13296-014-1002-8

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…To create the meshes of the models, 181 shell elements, with four nodes and six degrees of freedom per node, were chosen. These shell elements have already proved their suitability in the simulation of thin-walled hollow sections in [27] and [35][36][37]. In [38], the authors' conclusions agreed with those of many previous researchers [39], and concluded that shell elements provide satisfactory results for the simulation of welds in RHS, and offer an important saving in computation time compared with solid elements.…”

Section: Finite Element Modelingsupporting

confidence: 79%

The Resistance of Welded Joints of Galvanized RHS Trusses with Different Vent Hole Geometries

et al. 2019

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A worldwide-accepted technique to protect steel lattice girders with welded hollow sections against corrosion is the hot-dip galvanizing process. In this process, vent holes are required in braces to fill the inner part protecting them from corrosion, to allow the immersion of the structure in the zinc bath and to recover the excess fluid after the bath. The cross-section reduction due to the vent hole could lead to a decrease in the effective brace resistance; this is not easily quantified, because there are neither prescriptions nor recommendations in the design codes to assess this effect. Therefore, the hollow structural sections could be underutilized due to doubts regarding the safety of this type of joint. This research was conducted in order to categorize different geometries and positions of vent holes in order to determine the best in terms of joint efficiency. A validated finite element model considering welds on lattice girders joints was extended to take into account different vent hole shapes. This research concludes that the presence of ventilation holes such as the ones considered in this study does not significantly affect the joint resistance, and that all the analyzed hole shapes could be proposed as a valid solution for machining vent holes. The conclusions drawn up from this work could be useful for structural steel designers, providing them with valuable design recommendations.

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Section: Finite Element Modelingsupporting

confidence: 79%

The Resistance of Welded Joints of Galvanized RHS Trusses with Different Vent Hole Geometries

et al. 2019

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“…Adapted EC3 model for I and H profiles. This was the model initially proposed for the component in the study carried out on the lateral faces of RHS under ambient and high temperatures as an isolated component [4][5][6]. Although the results for the isolated RHS profile under a transverse compression were reasonable, it was only checked against a FEM with this condition: isolated RHS profile.…”

Section: Proposal For the Component Lateral Facesmentioning

confidence: 99%

“…The strength and stiffness of the isolated component under ambient and high temperature has been studied by the authors [4][5][6] and they have been provisionally proposed by the CIDECT [2] to improve of the Eurocode 3-1.8 by including hollow section joints in the component method.. However, the equations proposed to calculate stiffness of lateral faces of RHS in welded joints have only been validated with finite element analysis at high temperature.…”

Section: Previous Workmentioning

confidence: 99%

Stiffness of equal width welded I‐beam to RHS column connection

López‐Colina¹,

Serrano

Lozano

et al. 2021

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Despite some recent efforts, the use of mechanical approaches like the component method for the rotational stiffness of connections is still not present in the design codes for hollow sections. In addition, the easiest way to obtain semi‐rigid connections with high rotational stiffness or even rigid ones with I beams and RHS columns is to design both members with the same width. In this way, loads are transferred almost directly from the beam flanges to the side walls of the RHS, avoiding the high rotations due to the bending of the front face of the RHS. Considering all this, some experimental tests have been used by the authors to validate a finite element model that simulates equal width connections in which the component ‘lateral faces of RHS’ under transverse forces was the main source of beam rotation. This was selected as the most important component to be considered in the welded joints between I beams and RHS columns when they have the same width. Then, some different analytical approaches for its stiffness have been assessed by comparing them with the experimental and numerical results. This work finally proposes a design equation for the ‘lateral faces of RHS in tension or compression’ in order to be applied in a future unified proposal for the component method including hollow sections. In addition, a rotational stiffness approach for the equal width welded I‐to‐RHS connections has been directly derived from this.

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“…At least three solid elements were placed through the thickness, following one of the most generalized rules of thumb for accurately obtain bending stresses. The authors have previously used four elements through the thickness for this type of simulation of transverse compression in rectangular hollow sections [4], but the deeper experimental validation and calibration of the mesh size in plate-tube welded joints presented later in [17] lead to simplifying the mesh by including a minimum number of three elements in the wall thickness with sizes between 3 and 5 mm, for the area closest to the connection and the rest of the model, respectively. The number of elements varied from 15,700 to 22,900 in the six finite element models, and the number of nodes from approximately 59,500 to 87,800.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Therefore, there are large groups of potentially interesting joints with hollow sections that cannot be characterized because their components have not yet been included in the component method. Some previous research [3,4] has been done to widen the scope of the component method in order to cover the hollow sections. In these references, some analytical equations supported by experimentation and numerical analysis have been presented to be able to characterize some individual components of the joint as a previous step to joint characterization.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Heat-Affected Zone Mechanical Properties on the Behaviour of the Welding in Transverse Plate-to-Tube Joints

et al. 2018

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Eurocode 3 establishes the component method to analytically characterize the structural joints between beam and columns. When one of the members involved in the joint is a hollow section (i.e., a tube) there is a lack of information for the specific components present in the joint. There are two different ways to bridge the gap: experimental testing on the actual beam column joints involving tubular sections; or numerical modelization, typically by means of finite element analysis. For this second option, it is necessary to know the actual mechanical properties of the material. As long as the joint implies a welding process, there is a concern related to how the mechanical properties in the heat-affected zone (HAZ) influence the behavior of the joint. In this work, some coupons were extracted from the HAZ of the beam-column joint. The coupons were tested and the results were implemented in the numerical model of the joint, in an attempt to bring it closer to the experimental results of the tested joints.

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The component ‘lateral faces of RHS’ under compression at ambient and high temperature

Cited by 6 publications

References 4 publications

The Resistance of Welded Joints of Galvanized RHS Trusses with Different Vent Hole Geometries

The Resistance of Welded Joints of Galvanized RHS Trusses with Different Vent Hole Geometries

Stiffness of equal width welded I‐beam to RHS column connection

The Influence of the Heat-Affected Zone Mechanical Properties on the Behaviour of the Welding in Transverse Plate-to-Tube Joints

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