Analysis of a Connection between an Angle Cleat and a Column Flange for an Eccentrically Applied Force

Objective: Check the mode for calculating welded connections

Task: Check the fillet welded connection between an angle cleat and a column flange for an eccentrically applied force.

References: Moskalev N.S., Pronosin J.A. Steel Structures. Handbook / M.: ASV Publishing House, 2010. p. 86-87.

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:

N = 700 kN	Force
е = 80 mm	Eccentricity
Run = 370 MPa	Steel С245
Rwf = 185 MPa	Manual welding with E42 electrodes
h = 380 mm	height of the cleat
kf = 12 mm	Weld leg
t = 20 mm	thickness of elements

 

Initial data file:

1.6.sav;
report — Kristall1.6.doc

 

KRISTALL initial data:
Steel: C245

Importance factor	1
Service factor	1
Group of structures according to the table 50* of SNiP II-23-81*	4

 

Properties of welding materials:
Characteristic resistance of the weld metal based on the ultimate strength, Rwun	410000 kN/m2
Design resistance of the fillet welds for shear in the weld metal, Rwf	180000 kN/m2
Type of welding	Manual
Position of weld	Flat
Climatic region	with temperature  t > -40°C

 

Type	Parameters
	Weld leg = 12 mm h = 380 mm t = 20 mm tf = 20 mm

Internal forces and moments:

N = 0 N
M_y = 56000 Nm
Q_z = 700000 N

Checked according to SNiP	Check	Utilization factor
Sec.11.2 Formula (120)	of the weld metal	1.025
Sec.11.2 Formula (121)	of the metal of the fusion border	0.775

 

Comparison of solutions:

Check	of the weld metal
Source	18,44 kN/cm2 / 18,5 kN/cm2 = 0,997
KRISTALL	1,025
Deviation, %	2,81

 

Comments:

The difference can be explained by the fact that in the book the value of the design resistance is taken as R_wf = 185 MPa, while KRISTALL uses the value of R_wf = 180 MPa in full compliance with SP 16.13330.2011 and DBN B.2.6-163:2010.