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It is common practice in the offshore industry to solve the punching shear problem due to compression by using doubler plate. The finite-element method is a useful tool for studying this problem. The aim of this paper is to study the static strength of doubler plate reinforced Y-joints subjected to compression loading. The finite-element method is adopted in numerical parametric studies. The individual influences of the geometric parameters βand τ_d (doubler plate to chord wall thickness ratio) and l_d/d_1(dubler plate length to brace diameter ratio) on the ultimate strength are made clear. The results show the size of plate may have important effects on the strength of reinforced joints. It is found that the ultimate strength of Y-joints reinforced with appropriately proportioned doubler plates can be greatly improved nearly up tothree times to un-reinforced Y-joints.
The is-common method in the offshore industry to solve the punching shear problem due to compression by using doubler plate. The aim-this method is a useful tool for studying this problem. The aim of this paper is to study the static strength of doubler plate The finite-element method is adopted in numerical parametric studies. The individual influences of the geometric parameters βand τ_d (doubler plate to chord wall thickness ratio) and l_d / d_1 (dubler plate length to brace diameter ratio is on the ultimate strength are made clear. The results show the size of plate may have important effects on made strength. up tothree times to un-reinforced Y-joints.