V. AISC LRFD - Tee Section Compression Capacity
To find a suitable American T-section with an axial compressive strength of 100 Kips.
Reference
Hand calculation using the following reference:
AISC Load Factor Resistance Design, 3rd Edition, Example 4.4, page 4-13.
Problem
The member ends are pinned, and the member is braced at the ends only for both axes.
Fy = 50 ksi |
Length = 20 ft |
Comparison
The reported STAAD.Pro value is based on the term PNC in the STAAD.Pro output.
Result Type | Theory | STAAD.Pro | Difference | |
---|---|---|---|---|
Design strength (kips) | 102 | 101.56 | none |
STAAD Input
The file C:\Users\Public\Public Documents\STAAD.Pro 2023\Samples \Verification Models\09 Steel Design\US\AISC\AISC LRFD - Tee Section Compression Capacity.STD is typically installed with the program.
STAAD SPACE AXIAL COMPRESSION CAPACITY PER AISC LRFD 3RD ED
START JOB INFORMATION
ENGINEER DATE 23-Sep-18
END JOB INFORMATION
*
* EXAMPLE PROBLEM 4.4, PAGE 4-13, AISC LRFD 3RD ED.
* CAPACITY (PNC) SHOULD BE ABOUT 102 KIPS
*
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 0 20 0;
MEMBER INCIDENCES
1 1 2;
MEMBER PROPERTY AMERICAN
1 TABLE T W12X26
UNIT INCHES KIP
DEFINE MATERIAL START
ISOTROPIC MATERIAL1
E 29000
POISSON 0.3
END DEFINE MATERIAL
UNIT FEET KIP
CONSTANTS
MATERIAL MATERIAL1 ALL
SUPPORTS
1 PINNED
2 FIXED BUT FY MX MZ
LOAD 1
JOINT LOAD
2 FY -100
PERFORM ANALYSIS
UNIT INCHES KIP
PARAMETER 1
CODE LRFD
FYLD 50 ALL
TRACK 1 ALL
SELECT ALL
FINISH
STAAD Output
STAAD.Pro MEMBER SELECTION - (LRFD 3RD EDITION) v1.0 ************************** ALL UNITS ARE - KIP INCH (UNLESS OTHERWISE Noted) MEMBER TABLE RESULT/ CRITICAL COND/ RATIO/ LOADING/ FX MY MZ LOCATION ======================================================================= 1 T W14X53 (AISC SECTIONS) PASS LRFD-H1-1A-C 0.985 1 100.00 C 0.00 0.00 0.00 +---------------------------------------------------------------------+ | DESIGN STRENGTHS FOR MEMBER 1 UNITS - KIP IN | | PNC= 101.56 PNT= 351.00 MNZ= 209.89 MNY= 322.15 VN= 69.43 | +---------------------------------------------------------------------+