CFVR8667 - AISC15: Chapter F Design of Members for Flexure .
Bending check according to AISC15 - W-SHAPE IN MINOR AXIS
A W-shape beam is subjected to a bending moment.
The beam is simply supported and braced only at the ends. The beam is ASTM A992 material. The aim of the example is to obtain the Available Flexural Strength according to AISC15 (LRFD/ASD). REFERENCE: Volume 1: Design Examples Version 15.1 EXAMPLE F.5 I-SHAPED FLEXURAL MEMBER IN MINOR AXIS BENDING
Element types used in the model: BEAM188 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 1 |
| Number of nodes | 2 |
| Number of civil materials | 1 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR8667.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR8667' /TITLE, %NomFile%, AISC15: Bending Check !-------------------------------------------------------------------------------------- ! Model definition !-------------------------------------------------------------------------------------- ! CivilFEM Setup: Code & Units ~UNITS,,LENG,IN ~UNITS,,FORC,KIPS! in, sec, Kips ~CODESEL,AISC15 ! Parameters M = 113*12 ! Moment kip-in Fyy = 50 ! ksi Fuu = 65 ! ksi /PREP7 ! Preprocessor ! -------------------------------------------------- ! Materials ~CFMP,1,LIB,STEEL,ASTM,A36 ! ASTM A992 ~CFMP,1,NAME,,,ASTM A992 ~CFMP,1,USER ~CFMP,1,AISC15 ,Fy,,Fyy ,1,0,0 ~CFMP,1,AISC15 ,Fu,,Fuu ,1,0,0 ! Element Types ET,1,188 ! Type 1: 3D Beam ! Cross Section ~SSECLIB,1,1,51,217 !W 12x58 ! member property: ~MEMBPRO,1,AISC15,ALL,15*12,1.00,1.00,1.00,1.00,0, ! Beam & Shell Property ~BMSHPRO,1,BEAM,1,1,,,188,1,0,,Beam 1 ! Nodes N,1 N,2,,2 ! Elements SECNUM,1 REAL,1 E,1,2 /SOLU ! Solution ! -------------------------------------------------- ! Constrains D,1,all ! Apply Load SFBEAM,ALL,1,pres,M ! Solve SOLVE /POST1 ! Postprocessor ! -------------------------------------------------- ! Read results ~CFSET,,1 ! First load case ! Checking ~CHKSTL,BENDING,Y,LRFD ~CHKSTL,BENDING,Y,ASD !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 8 NComp_ch = 0 ! Marix dim. *DIM,LABEL,CHAR,Ncomp,1 *DIM,LABEL_CH,CHAR,Ncomp_ch,1 *DIM,VALUE,,Ncomp,3 *DIM,VALUE_CH,CHAR,Ncomp_ch,3 *DIM,TOLER,,Ncomp,2 ! Labels LABEL(1,1) = 'MU' LABEL(2,1) = 'MP' LABEL(3,1) = 'MN_YLD' LABEL(4,1) = 'CLS_BEND' LABEL(5,1) = 'CRT_LRFD' LABEL(6,1) = 'CRT_ASD' LABEL(7,1) = 'CRT_YLDL' LABEL(8,1) = 'CRT_YLDA' ! Correct values VALUE(1,1)= 1356 ! required flexural strength VALUE(2,1)= 1630 ! Plastic bending moment VALUE(3,1)= 1630 ! Nominal Flexural Strength for yielding limit state VALUE(4,1)= 1.00 ! COMPACT BEAM VALUE(5,1)= 0.924 ! LRFD CRITERION VALUE(6,1)= 1.389 ! ASD CRITERION VALUE(7,1)= 0.924 ! Yielding CRITERION LRFD VALUE(8,1)= 1.389 ! Yielding CRITERION ASD ! Comparison ~CFSET,1 ! LRFD ~CFGET,VALUE(1,2),ELEMENT,1,RESULT,MU,I ~CFGET,VALUE(2,2),ELEMENT,1,RESULT,MP,I ~CFGET,VALUE(3,2),ELEMENT,1,RESULT,MN_YLD,I ~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CLS_BEND,I ~CFGET,VALUE(5,2),ELEMENT,1,RESULT,CRT_TOT,I ~CFGET,VALUE(7,2),ELEMENT,1,RESULT,CRT_YLD,I ~CFSET,2 ! ASD ~CFGET,VALUE(6,2),ELEMENT,1,RESULT,CRT_TOT,I ~CFGET,VALUE(8,2),ELEMENT,1,RESULT,CRT_YLD,I ! Warning and error tolerances *DO,JJ,1,8 TOLER(JJ,1)= 0.04*VALUE(JJ,1) $ TOLER(JJ,2)= 0.04*VALUE(JJ,1) *ENDDO !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| MU | 1356 | 1356 | 1.000 | 54.24 |
| MP | 1630 | 1625 | 1.003 | 65.2 |
| MN_YLD | 1630 | 1625 | 1.003 | 65.2 |
| CLS_BEND | 1 | 1 | 1.000 | 0.04 |
| CRT_LRFD | 0.924 | 0.92718 | 0.997 | 0.03696 |
| CRT_ASD | 1.389 | 1.3936 | 0.997 | 0.05556 |
| CRT_YLDL | 0.924 | 0.92718 | 0.997 | 0.03696 |
| CRT_YLDA | 1.389 | 1.3936 | 0.997 | 0.05556 |
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