V. BS5950 2000 - Pinned Column Using Slender CHS
A 6.0m circular hollow section (CHS) column is pin ended about both axes and has no intermediate restraints.
Reference
Steelwork Design Guide to BS 5950-1:2000, Volume 2, Worked Examples, SCI publication P326, Example 12, The Steel Construction Institute.
Problem
The column is designed in S355 steel for the factored loading.
Point load, Fc = 2,500 kN
Comparison
Result Type | Theory | STAAD.Pro | Difference |
---|---|---|---|
Effective area, Aeff (cm2) | 77.6 | 77.63 | none |
Slenderness, λ | 42.2 | 42.413 | none |
Compression capacity, Pc (kN-m) | 2,561 | 2,562.3 | none |
STAAD Input
-
TRACK 2 ALL
- Maximum detail output
-
SGR 1 ALL
- Identifies steel grade as S355
Tip: You can copy and paste this content directly into a .std file to run in STAAD.Pro.
The file C:\Users\Public\Public Documents\STAAD.Pro 2024\Samples \Verification Models\09 Steel Design\UK\BS5950 2000 - Pinned Column Using Slender CHS.STD is typically installed with the program.
STAAD SPACE
START JOB INFORMATION
JOB NAME Example no. 12
JOB CLIENT The Steel Construction Institute
JOB COMMENT Pinned column using a slender CHS.
ENGINEER DATE Jun-2003
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 0 6 0;
MEMBER INCIDENCES
1 1 2;
*************************************
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+08
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-05
DAMP 0.03
END DEFINE MATERIAL
MEMBER PROPERTY BRITISH
1 TABLE ST PIP4066.3
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 FIXED
*************************************
LOAD 1 AXIAL FORCE
JOINT LOAD
2 FY -2500
PERFORM ANALYSIS PRINT STATICS CHECK
***************************************
PARAMETER 1
CODE BS5950
SGR 1 ALL
TRACK 2 ALL
CHECK CODE ALL
FINISH
STAAD Output
STAAD.Pro CODE CHECKING - (BSI )
***********************
PROGRAM CODE REVISION V2.13_5950-1_2000
STAAD SPACE -- PAGE NO. 5
ALL UNITS ARE - KN METE (UNLESS OTHERWISE Noted)
MEMBER TABLE RESULT/ CRITICAL COND/ RATIO/ LOADING/
FX MY MZ LOCATION
=======================================================================
1 ST PIP4066.3 PASS BS-4.7 (C) 0.976 1
2500.00 C 0.00 0.00 0.00
=======================================================================
MATERIAL DATA
Grade of steel = S 355
Modulus of elasticity = 205 kN/mm2
Design Strength (py) = 355 N/mm2
SECTION PROPERTIES (units - cm)
Member Length = 600.00
Gross Area = 79.20 Net Area = 79.20 Eff. Area = 77.63
z-z axis y-y axis
Moment of inertia : 15850.002 15850.002
Plastic modulus : 1009.000 1009.000
Elastic modulus : 780.020 780.020
Effective modulus : 780.020 780.020
Shear Area : 47.520 47.520
DESIGN DATA (units - kN,m) BS5950-1/2000
Section Class : SLENDER
Squash Load : 2811.60
Axial force/Squash load : 0.889
z-z axis y-y axis
Compression Capacity : 2562.3 2562.3
Shear Capacity : 1012.2 1012.2
BUCKLING CALCULATIONS (units - kN,m)
(axis nomenclature as per design code)
x-x axis y-y axis
Slenderness : 42.413 42.413
Radius of gyration (cm) : 14.147 14.147
Effective Length : 6.000 6.000
LTB check unnecessary for this section
CRITICAL LOADS FOR EACH CLAUSE CHECK (units- kN,m):
CLAUSE RATIO LOAD FX VY VZ MZ MY
BS-4.7 (C) 0.976 1 2500.0 - - - -
Torsion and deflections have not been considered in the design.
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