关键词:
Local joint flexibility
K-joints
Axial load
External stiffener plates
Parametric study
Design formula
摘要:
The Local Joint Flexibility(_(LJF))of steel K-joints reinforced with external plates under axial loads is investigated in this *** this aim,firstly,a finite element(FE)model was produced and verified with the results of several experimental *** the next step,a set of 150 FE models was generated to assess the effect of the brace angle(θ),the stiffener plate size(ηandλ),and the joint geometry(γ,τ,ξ,andβ)on the_(LJF)factor(f_(LJF)).The results showed that using the external plates can decrease 81%of the f_(LJF).Moreover,the reinforcing effect of the reinforcing plate on the f_(LJF)is more remarkable in the joints with smallerβ.Also,the effect of theγon the f_(LJF)ratio can be *** the important effect of the f_(LJF)on the behavior of tubular joints,there is not available any study or equation on the f_(LJF)in any reinforced K-joints under axial ***,using the present FE results,a design parametric equation is *** equation can reasonably predict the f_(LJF)in the reinforced K-joints under axial load.