Static strength of collar plate reinforced tubular T/Y-joints under brace compressive loading
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Lotfollahi-Yaghin, MA
Ahmadi, H
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Abstract
In the present paper, the static strength of steel collar plate reinforced tubular T/Y-joints is numerically investigated. A finite element (FE) model was developed and the results were verified against the experimental data. Afterwards, a set of 168 FE models of collar plate reinforced T/Y-joints was generated and analyzed under axially compressive loads. The effect of plate size and joint geometry on the ultimate strength and failure mechanism of the joints were investigated through a parametric study. Results showed that the ultimate strength of a collar plate reinforced T/Y-joint can be up to 270% of the strength of the corresponding unreinforced joint. Despite this significant difference between the static strength of unreinforced and collar plate reinforced T/Y-joints, studies on this type of reinforced joints have been limited to very few T-joint tests. Also, no design equation is available to determine the ultimate strength of T/Y-joints reinforced with collar plates. Hence, after the parametric study, a new equation is proposed, through nonlinear regression analysis, for determining the ultimate strength of collar plate reinforced T/Y-joints under axially compressive loads.
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Journal of Constructional Steel Research
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119
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Building
Civil engineering
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Nassiraei, H; Lotfollahi-Yaghin, MA; Ahmadi, H, Static strength of collar plate reinforced tubular T/Y-joints under brace compressive loading, Journal of Constructional Steel Research, 2016, 119, pp. 39-49