GATE CE 2020 Set 2 — Question 54
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Structural Engineering → Connections & Plastic Analysis → Welded Connections
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Question
Two steel plates are lap jointed in a workshop using thick fillet weld as shown in the figure (not drawn to the scale). The ultimate strength of the weld is .
As per Limit State Design of IS 800:2007, the design capacity (in kN, round off to three decimal places) of the welded connection, is __________.
Correct answer
400 to 420
Solution
The design strength of a fillet weld () is calculated as:where:
(ultimate strength of the weld)
(partial safety factor for shop welding)
is the effective length of the weld.
is the effective throat thickness.From the figure, the total effective length of the weld is the sum of the two longitudinal welds and the one transverse weld:The throat thickness for a weld (assuming fusion angle) is:Substituting the values:The design capacity of the connection is .
(ultimate strength of the weld)
(partial safety factor for shop welding)
is the effective length of the weld.
is the effective throat thickness.From the figure, the total effective length of the weld is the sum of the two longitudinal welds and the one transverse weld:The throat thickness for a weld (assuming fusion angle) is:Substituting the values:The design capacity of the connection is .
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