Experimental investigation on cold-formed steel elliptical hollow section T-joints

Chen, Man-Tai; Chen, Yangyu; Young, Ben

doi:10.1016/j.engstruct.2023.115593

Cited by 39 publications

(4 citation statements)

References 80 publications

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“…In the meantime, the metallurgical industry has sought to develop advanced manufacturing technologies [28][29][30][31] and new steel tubular section profiles, e.g. round-ended oval [32,33], semi-oval [34][35][36][37], polygonal [38][39][40] and elliptical sections [41][42][43][44][45], so as to offer various design alternatives for engineers. The use of high strength steel materials would facilitate in the reduction of self-weight of structures and associated handling, fabrication, transportation costs and erection time [46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of high strength steels and weld metals at arctic low temperatures

Chen

Cai

Pandey

et al. 2023

Thin-Walled Structures

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of high strength steels and weld metals at arctic low temperatures

Chen

Cai

Pandey

et al. 2023

Thin-Walled Structures

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“…To mitigate the effect of chord end supports to the stress distribution of the brace-chord junction, the chord length (L0) was designed as the sum of 3 times the chord height (3h0), the brace height (h1), and the length of two steel sitting blocks (180mm). The abovementioned member length design concept has been successfully adopted by previous research studies [24][25][26][27][28]. Longitudinal tensile coupons were wire-cut from the middle of the SOHS flat web, the middle of RHS web with larger depth and the middle of the SHS web at the location with 90 angle from the welding seam.…”

Section: Introductionmentioning

confidence: 99%

Cold‐formed steel T‐joints with semi‐oval hollow section chord: Experimental insight and finite element modelling

Oeng,

Chen,

Young

2023

ce papers

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Experimental study and finite element modelling of cold‐formed steel T‐joints with semi‐oval hollow section (SOHS) chord are presented. The rectangular or square hollow section (RHS/SHS) brace was welded to the flat flange of SOHS chord by robotic gas metal arc welding. Twelve SOHS T‐joints with brace‐to‐chord width ratio β from 0.29 to 0.89 were tested with the chord simply supported and the brace axially compressed. The joint strengths, failure modes and load‐deformation responses are discussed. The feasibility of the current design provisions in the CIDECT and Eurocode 3 initially developed for RHS T‐joints was examined. Generally, the predictions by these design methods are quite conservative for T‐joints with cold‐formed steel SOHS chord. In addition, a finite element model was developed to simulate the cold‐formed steel T‐joints with semi‐oval hollow section chord. Details of numerical model, including element type and mesh size as well as heat affected zone and cold‐working effect considerations, are described. The model was verified against the test results in terms of joint strength and load‐deformation response.

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“…Joint is one of the fundamental structural elements. Traditional joint types such as spherical joints [11][12][13][14] and tubular joints [15][16][17][18] have been widely used in gridshell structures. Recently, additive manufacturing (AM) oriented joint topology optimization (TO) has emerged in gridshell structures as a novel integrated computer-aided architectural design (CAAD) and construction paradigm [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Novel Paradigm for Steel Joints in Gridshell Structures: from Structural Optimization to Advanced Construction

Chen,

Zuo,

Huang

et al. 2023

ce papers

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Novel integrated computer‐aided paradigm/workflow for the topology optimization (TO) and additive manufacturing (AM) of steel joints in gridshell structures is proposed. The architecture scheme of gridshell structure was first established and numerically analyzed through Grasshopper parametric platform. Based on the extracted joint geometric parameters and the corresponding loading conditions, the initial joint structures were parametrically modelled using the subdivision surface method. Further parametric TO design was accomplished by the bi‐directional evolutionary structural optimization (BESO) method on the basis of cloud computing server. A series of mesh smoothing and reverse modelling algorithms were applied to the optimized joint to obtain a closed smooth surface in the NURBS form, which was then output as STL file for additive manufacturing. One typical optimized joint was additively manufactured using selective laser melting. The proposed workflow can be extended to a much wider range of spatial structures with various joint types.

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Experimental investigation on cold-formed steel elliptical hollow section T-joints

Cited by 39 publications

References 80 publications

Mechanical properties of high strength steels and weld metals at arctic low temperatures

Mechanical properties of high strength steels and weld metals at arctic low temperatures

Cold‐formed steel T‐joints with semi‐oval hollow section chord: Experimental insight and finite element modelling

Novel Paradigm for Steel Joints in Gridshell Structures: from Structural Optimization to Advanced Construction

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