V. AISC LRFD - Round HSS Compression Capacity
To validate that an American Round HSS 10.000X0.5 compression member has a design compressive strength of about 364 kips.
Reference
Hand calculation using the following reference:
AISC Load Factor Resistance Design, 3rd Edition, Table 4-7, Page 4-68.
Problem
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) | 364 | 364.22 | none |
STAAD Input
The file C:\Users\Public\Public Documents\STAAD.Pro 2024\Samples \Verification Models\09 Steel Design\US\AISC\AISC LRFD - Round HSS 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
*
* DESIGN COMPRESSIVE STRENGTH OF A ROUND HSS 10.000X0.5
* TABLE 4-7, PAGE 4-68, AISC LRFD 3RD ED.
* CAPACITY (PNC) SHOULD BE ABOUT 364 KIPS
*
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 0 20 0;
MEMBER INCIDENCES
1 1 2;
MEMBER PROPERTY AMERICAN
1 TABLE ST HSSP10X0.5
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 -350
PERFORM ANALYSIS
UNIT INCHES KIP
PARAMETER 1
CODE LRFD
FYLD 42 ALL
TRACK 1 ALL
CHECK CODE ALL
FINISH
STAAD Output
STAAD.Pro CODE CHECKING - (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 ST HSSP10X0.5 (AISC SECTIONS)
PASS HSS COMPRESS 0.961 1
350.00 C 0.00 0.00 0.00
+---------------------------------------------------------------------+
| DESIGN STRENGTHS FOR MEMBER 1 UNITS - KIP IN |
| PNC= 364.22 PNT= 525.42 MNZ= 1598.94 MNY= 1598.94 |
| VNZ= 157.63 VNY= 157.63 TN= 1440.18 |
+---------------------------------------------------------------------+