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.
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
The file C:\Users\Public\Public Documents\STAAD.Pro 2023\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. _________________________