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Citation:
　Hossein Nassiraei,Amin Yara.Numerical Analysis of Local Joint Flexibility of K-joints with External Plates Under Axial Loads in Offshore Tubular Structures[J].Journal of Marine Science and Application,2022,(4):134-144.[doi:10.1007/s11804-022-00302-w]
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Numerical Analysis of Local Joint Flexibility of K-joints with External Plates Under Axial Loads in Offshore Tubular Structures

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Title:
Numerical Analysis of Local Joint Flexibility of K-joints with External Plates Under Axial Loads in Offshore Tubular Structures
Author(s):
Hossein Nassiraei;  Amin Yara
Affilations:
Author(s):
Hossein Nassiraei;  Amin Yara
Department of Civil Engineering, Faculty of Engineering, University of Guilan, Guilan, Iran
Keywords:
Local joint flexibility|K-joints|Axial load|External stiffener plates|Parametric study|Design formula
分类号:
-
DOI:
10.1007/s11804-022-00302-w
Abstract:
The Local Joint Flexibility (LJF) of steel K-joints reinforced with external plates under axial loads is investigated in this paper. For this aim, firstly, a finite element (FE) model was produced and verified with the results of several experimental tests. In the next step, a set of 150 FE models was generated to assess the effect of the brace angle (θ), the stiffener plate size (η and λ), and the joint geometry (γ, τ, ξ, and β) on the LJF factor (fLJF). The results showed that using the external plates can decrease 81% of the fLJF. Moreover, the reinforcing effect of the reinforcing plate on the fLJF is more remarkable in the joints with smaller β. Also, the effect of the γ on the fLJFratio can be ignored. Despite the important effect of the fLJF on the behavior of tubular joints, there is not available any study or equation on the fLJF in any reinforced K-joints under axial load. Consequently, using the present FE results, a design parametric equation is proposed. The equation can reasonably predict the fLJF in the reinforced K-joints under axial load.

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Memo

Memo:
Received date:2022-07-29;Accepted date:2022-09-19。
Corresponding author:Hossein Nassiraei,E-mail:h.nassiraei@guilan.ac.ir
Last Update: 2023-01-05