Analysis of a Welded Connection with Fillet Welds at the Simultaneous Action of Longitudinal and Lateral Forces

l₁=30 cm; l₂=20 cm; l₃=81cm

Objective: Check the mode for calculating welded connections

Task: Check the welded connection with fillet welds. The connection is loaded with longitudinal and lateral forces.

References: Manual to SNiP II-23-81. Welded Connections. 1984. p. 30 – 33.

Compliance with the codes: SNiP II-23-81*, SP 16.13330.2011, SP 16.13330.2017, DBN B.2.6-163:2010, DBN B.2.6-198:2014.

Initial data file:

1. when the weld leg is kf = 10 mm:	1.3-1.sav;	report — Kristall1.3-1.doc
2. when the weld leg is kf = 5 mm:	1.3-2.sav;	report — Kristall1.3-2.doc

Initial data:

N = 100 kN	Longitudinal force
Q = 38 kN	Lateral force
Run = 370 MPa	Steel VSt3
Rwf = 200 MPa, βf = 0,7	Welding with coated E46 electrodes
γwf = γc = 1	Service factors

KRISTALL initial data when the weld leg is 10 mm:
Steel: C255

Importance factor	1
Service factor	1
Group of structures according to the table 50* of SNiP II-23-81*	1

 

Properties of welding materials:
Characteristic resistance of the weld metal based on the ultimate strength, Rwun	45871.56 T/m2
Design resistance of the fillet welds for shear in the weld metal, Rwf	20387.36 T/m2
Type of welding	Manual
Position of weld	Flat
Climatic region	with temperature  t > -40°C

 

Type:	Parameters:
	Weld leg = 10 mm b = 300 mm h = 200 mm t = 10 mm tf = 10 mm

Internal forces and moments:

N = 100 kN
M_y = 30.78 kNm
Q_z = -38 kN

KRISTALL initial data when the weld leg is 5 mm:
Steel: C255

Importance factor	1
Service factor	1
Group of structures according to the table 50* of SNiP II-23-81*	1

 

Properties of welding materials:
Characteristic resistance of the weld metal based on the ultimate strength, Rwun	45871.56 T/m2
Design resistance of the fillet welds for shear in the weld metal, Rwf	20387.36 T/m2
Type of welding	Manual
Position of weld	Flat
Climatic region	with temperature  t > -40°C

 

Type:	Parameters:
	Weld leg = 5 mm b = 300 mm h = 200 mm t = 10 mm tf = 10 mm

Internal forces and moments:

N = 100 kN
M_y = 30.78 kNm
Q_z = -38 kN

Comparison of solutions:

Weld leg, mm	10	5
Check	of the weld metal	of the weld metal
Source	96,2/200 = 0,48	198/200 = 0,99
KRISTALL	0,461	0,941
Deviation, %	3,95	4,9

 

Comments:

The difference in the results is due to the inaccuracy made by the authors of the example in the design section of the weld. It should be also noted, that in the problem the force Q is transferred through the cantilever of 81 cm, therefore the moment М = 38 kN *0,81 m = 30,78 kNm is additionally specified in KRISTALL.