V. AISC 360-05 C LTB Test F.2-2
References
- Steel Construction Manual, Version 13.0, American Institute of Steel Construction, 2005
- Design Examples, Version 13.0, American Institute of Steel Construction, 2005, Example F.2-2, pp.F-16 - F-19
Details
From reference (2):
Check the C15×33.9 beam selected in Example F.2-1a, assuming it is braced at the ends and the fifth points rather than continuously braced.
Result Type | Reference | STAAD.Pro | Difference | Comments |
---|---|---|---|---|
ϕbMn (kips) [LRFD] | 131 | 130 | negligible | |
Mn/Ωb (kips) [ASD] | 86.8 | 86.7 | negligible |
STAAD.Pro Input File
The file C:\Users\Public\Public Documents\STAAD.Pro 2024\Samples \Verification Models\09 Steel Design\US\AISC\AISC 360-05 C LTB Test F.2-2.STD is typically installed with the program.
STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 30-Mar-20
END JOB INFORMATION
INPUT WIDTH 79
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 25 0 0;
MEMBER INCIDENCES
1 1 2;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 4.176e+06
POISSON 0.3
DENSITY 0.489024
ALPHA 6.5e-06
DAMP 0.03
TYPE STEEL
STRENGTH RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 TABLE ST C15X33
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 FIXED BUT MZ
2 FIXED BUT FX MZ
LOAD 1 LOADTYPE None TITLE LOAD CASE 1
MEMBER LOAD
1 UNI GY -0.23
LOAD 2 LOADTYPE None TITLE LOAD CASE 2
MEMBER LOAD
1 UNI GY -0.69
LOAD COMB 3 COMBINATION LOAD CASE 3
1 1.2 2 1.6
LOAD COMB 4 COMBINATION LOAD CASE 4
1 1.0 2 1.0
PERFORM ANALYSIS
LOAD LIST 3
PARAMETER 1
CODE AISC UNIFIED 2005
FYLD 5184 ALL
FU 8352 ALL
CB 1 ALL
FLX 1 ALL
METHOD LRFD
TRACK 2 ALL
UNB 5 ALL
UNT 5 ALL
CHECK CODE ALL
LOAD LIST 4
PARAMETER 2
CODE AISC UNIFIED 2005
FYLD 5184 ALL
FU 8352 ALL
CB 1 ALL
FLX 1 ALL
METHOD ASD
TRACK 2 ALL
UNB 5 ALL
UNT 5 ALL
CHECK CODE ALL
FINISH
STAAD.Pro Output
STAAD.PRO CODE CHECKING - (AISC-360-05-LRFD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
MEMBER TABLE RESULT/ CRITICAL COND/ RATIO/ LOADING/
FX MY MZ LOCATION
=======================================================================
* 1 ST C15X33 (AISC SECTIONS)
FAIL SLENDERNESS 1.113 3
0.00 0.00 0.00 0.00
|-----------------------------------------------------------------------|
| SLENDERNESS |
| Actual Slenderness Ratio : 333.952 L/C : 3 |
| Allowable Slenderness Ratio : 300.000 LOC : 0.00 |
|-----------------------------------------------------------------------|
| STRENGTH CHECKS |
| Critical L/C : 3 Ratio : 1.113(FAIL) |
| Loc : 0.00 Condition : SLENDERNESS |
|-----------------------------------------------------------------------|
| DESIGN FORCES |
| Fx: 0.000E+00( ) Fy: 1.725E+01 Fz: 0.000E+00 |
| Mx: 0.000E+00 My: 0.000E+00 Mz: 0.000E+00 |
|-----------------------------------------------------------------------|
| SECTION PROPERTIES (UNIT: INCH) |
| Azz: 4.420E+00 Ayy: 6.000E+00 Cw: 3.555E+02 |
| Szz: 4.200E+01 Syy: 3.178E+00 |
| Izz: 3.150E+02 Iyy: 8.070E+00 Ix: 1.010E+00 |
|-----------------------------------------------------------------------|
| MATERIAL PROPERTIES |
| Fyld: 5183.999 Fu: 8351.999 |
|-----------------------------------------------------------------------|
| Actual Member Length: 25.000 |
| Design Parameters |
| Kz: 1.00 Ky: 1.00 NSF: 1.00 SLF: 1.00 CSP: 12.00 |
|-----------------------------------------------------------------------|
| SECTION CLASS UNSTIFFENED / λ λp λr CASE |
| STIFFENED |
| Compression : Non-Slender 5.23 N/A 15.89 T.B4.1-3 |
| Non-Slender 34.25 N/A 42.29 T.B4.1-10 |
| Flexure : Compact 5.23 10.79 28.38 T.B4.1-1 |
| Compact 34.25 106.72 161.78 T.B4.1-9 |
STAAD SPACE -- PAGE NO. 4
STAAD.PRO CODE CHECKING - (AISC-360-05-LRFD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
|-----------------------------------------------------------------------|
| CHECK FOR AXIAL TENSION |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Yield -0.00E+00 3.24E+02 0.000 Eq. D2-1 3 0.00 |
| Rupture -0.00E+00 4.35E+02 0.000 Eq. D2-2 3 0.00 |
|-----------------------------------------------------------------------|
| CHECK FOR AXIAL COMPRESSION |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Maj Buck 0.00E+00 2.79E+02 0.000 Sec. E1 3 0.00 |
| Min Buck 0.00E+00 2.03E+01 0.000 Eq. E3-1 3 0.00 |
| Flexural |
| Tor Buck 0.00E+00 2.07E+02 0.000 Eq. E4-1 3 0.00 |
| Intermediate |
| Results Eff Area KL/r Fcr Fe Pn |
| Maj Buck 6.94E-02 53.45 4.46E+03 1.44E+04 3.10E+02 |
| Min Buck 6.94E-02 333.95 3.24E+02 3.70E+02 2.25E+01 |
| Flexural Ag Fcr Pn |
| Tor Buck 6.94E-02 3.31E+03 2.30E+02 |
|-----------------------------------------------------------------------|
| CHECK FOR SHEAR |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Local-Z -0.00E+00 8.59E+01 0.000 Eq. G2-1 3 0.00 |
| Local-Y 1.72E+01 1.17E+02 0.148 Eq. G2-1 3 0.00 |
| Intermediate |
| Results Aw Cv Kv h/tw Vn |
| Local-Z 3.07E-02 1.00 1.20 5.23 9.55E+01 |
| Local-Y 4.17E-02 1.00 5.00 34.25 1.30E+02 |
|-----------------------------------------------------------------------|
| CHECK FOR BENDING-YIELDING |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Major 1.08E+02 1.37E+02 0.786 Eq. F2-1 3 12.50 |
| Minor 0.00E+00 1.37E+01 0.000 Eq. F6-1 3 0.00 |
| Intermediate Mn My |
| Major 1.52E+02 0.00E+00 |
| Minor 1.53E+01 0.00E+00 |
|-----------------------------------------------------------------------|
| CHECK FOR BENDING-LATERAL TORSIONAL BUCKLING |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Major 1.08E+02 1.30E+02 0.827 Eq. F2-2 3 12.50 |
| Intermediate Mn Me Cb Lp Lr Lb |
| Major 1.45E+02 0.00E+00 1.00 3.74 14.49 5.00 |
STAAD SPACE -- PAGE NO. 5
STAAD.PRO CODE CHECKING - (AISC-360-05-LRFD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
|-----------------------------------------------------------------------|
| CHECK FOR FLEXURE TENS/COMP INTERACTION |
| RATIO CRITERIA L/C LOC |
| Flexure Comp 0.827 Eq. H1-1b 3 12.50 |
| Flexure Tens 0.827 Eq. H1-1b 3 12.50 |
| Intermediate Mcx Mrx Pc |
| Mcy Mry Pr |
| Flexure Comp 1.30E+02 1.08E+02 2.03E+01 |
| 1.37E+01 0.00E+00 0.00E+00 |
| Flexure Tens 1.30E+02 1.08E+02 3.24E+02 |
| 1.37E+01 0.00E+00 -0.00E+00 |
|-----------------------------------------------------------------------|
51. LOAD LIST 4
52. PARAMETER 2
53. CODE AISC UNIFIED 2005
54. FYLD 5184 ALL
55. FU 8352 ALL
56. CB 1 ALL
57. FLX 1 ALL
58. METHOD ASD
59. TRACK 2 ALL
60. UNB 5 ALL
61. UNT 5 ALL
62. CHECK CODE ALL
STEEL DESIGN
STAAD SPACE -- PAGE NO. 6
STAAD.PRO CODE CHECKING - ( AISC-360-05-ASD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
MEMBER TABLE RESULT/ CRITICAL COND/ RATIO/ LOADING/
FX MY MZ LOCATION
=======================================================================
* 1 ST C15X33 (AISC SECTIONS)
FAIL SLENDERNESS 1.113 4
0.00 0.00 0.00 0.00
|-----------------------------------------------------------------------|
| SLENDERNESS |
| Actual Slenderness Ratio : 333.952 L/C : 4 |
| Allowable Slenderness Ratio : 300.000 LOC : 0.00 |
|-----------------------------------------------------------------------|
| STRENGTH CHECKS |
| Critical L/C : 4 Ratio : 1.113(FAIL) |
| Loc : 0.00 Condition : SLENDERNESS |
|-----------------------------------------------------------------------|
| DESIGN FORCES |
| Fx: 0.000E+00( ) Fy: 1.150E+01 Fz: 0.000E+00 |
| Mx: 0.000E+00 My: 0.000E+00 Mz: 0.000E+00 |
|-----------------------------------------------------------------------|
| SECTION PROPERTIES (UNIT: INCH) |
| Azz: 4.420E+00 Ayy: 6.000E+00 Cw: 3.555E+02 |
| Szz: 4.200E+01 Syy: 3.178E+00 |
| Izz: 3.150E+02 Iyy: 8.070E+00 Ix: 1.010E+00 |
|-----------------------------------------------------------------------|
| MATERIAL PROPERTIES |
| Fyld: 5183.999 Fu: 8351.999 |
|-----------------------------------------------------------------------|
| Actual Member Length: 25.000 |
| Design Parameters |
| Kz: 1.00 Ky: 1.00 NSF: 1.00 SLF: 1.00 CSP: 12.00 |
|-----------------------------------------------------------------------|
| SECTION CLASS UNSTIFFENED / λ λp λr CASE |
| STIFFENED |
| Compression : Non-Slender 5.23 N/A 15.89 T.B4.1-3 |
| Non-Slender 34.25 N/A 42.29 T.B4.1-10 |
| Flexure : Compact 5.23 10.79 28.38 T.B4.1-1 |
| Compact 34.25 106.72 161.78 T.B4.1-9 |
STAAD SPACE -- PAGE NO. 7
STAAD.PRO CODE CHECKING - ( AISC-360-05-ASD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
|-----------------------------------------------------------------------|
| CHECK FOR AXIAL TENSION |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Yield -0.00E+00 2.16E+02 0.000 Eq. D2-1 4 0.00 |
| Rupture -0.00E+00 2.90E+02 0.000 Eq. D2-2 4 0.00 |
|-----------------------------------------------------------------------|
| CHECK FOR AXIAL COMPRESSION |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Maj Buck 0.00E+00 1.85E+02 0.000 Sec. E1 4 0.00 |
| Min Buck 0.00E+00 1.35E+01 0.000 Eq. E3-1 4 0.00 |
| Flexural |
| Tor Buck 0.00E+00 1.38E+02 0.000 Eq. E4-1 4 0.00 |
| Intermediate |
| Results Eff Area KL/r Fcr Fe Pn |
| Maj Buck 6.94E-02 53.45 4.46E+03 1.44E+04 3.10E+02 |
| Min Buck 6.94E-02 333.95 3.24E+02 3.70E+02 2.25E+01 |
| Flexural Ag Fcr Pn |
| Tor Buck 6.94E-02 3.31E+03 2.30E+02 |
|-----------------------------------------------------------------------|
| CHECK FOR SHEAR |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Local-Z -0.00E+00 5.72E+01 0.000 Eq. G2-1 4 0.00 |
| Local-Y 1.15E+01 7.76E+01 0.148 Eq. G2-1 4 0.00 |
| Intermediate |
| Results Aw Cv Kv h/tw Vn |
| Local-Z 3.07E-02 1.00 1.20 5.23 9.55E+01 |
| Local-Y 4.17E-02 1.00 5.00 34.25 1.30E+02 |
|-----------------------------------------------------------------------|
| CHECK FOR BENDING-YIELDING |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Major 7.19E+01 9.13E+01 0.788 Eq. F2-1 4 12.50 |
| Minor 0.00E+00 9.14E+00 0.000 Eq. F6-1 4 0.00 |
| Intermediate Mn My |
| Major 1.52E+02 0.00E+00 |
| Minor 1.53E+01 0.00E+00 |
|-----------------------------------------------------------------------|
| CHECK FOR BENDING-LATERAL TORSIONAL BUCKLING |
| |
| FORCE CAPACITY RATIO CRITERIA L/C LOC |
| Major 7.19E+01 8.67E+01 0.829 Eq. F2-2 4 12.50 |
| Intermediate Mn Me Cb Lp Lr Lb |
| Major 1.45E+02 0.00E+00 1.00 3.74 14.49 5.00 |
STAAD SPACE -- PAGE NO. 8
STAAD.PRO CODE CHECKING - ( AISC-360-05-ASD) v3.3a
********************************************
ALL UNITS ARE - KIP FEET (UNLESS OTHERWISE Noted)
|-----------------------------------------------------------------------|
| CHECK FOR FLEXURE TENS/COMP INTERACTION |
| RATIO CRITERIA L/C LOC |
| Flexure Comp 0.829 Eq. H1-1b 4 12.50 |
| Flexure Tens 0.829 Eq. H1-1b 4 12.50 |
| Intermediate Mcx Mrx Pc |
| Mcy Mry Pr |
| Flexure Comp 8.67E+01 7.19E+01 1.35E+01 |
| 9.14E+00 0.00E+00 0.00E+00 |
| Flexure Tens 8.67E+01 7.19E+01 2.16E+02 |
| 9.14E+00 0.00E+00 -0.00E+00 |
|-----------------------------------------------------------------------|