CFVR1072 - Seismic margin in structural steel check according to EC3-05
Case of compression and flexural Buckling.
A fixed steel beam subjected to a Fy load of -250 kN, a bending moment Mz of 50 m*kN and a bending moment Mx of -30 m*kN applied to an end of the beam.
The beam has a length of 10 m.
The cross section is a IPE 550.
The beam is made of Fe 460 steel which has a fy of 460000 kN/m2.
Member NOT susceptible to torsional deformations The aim of this example is to obtain the scale factor for permissible inelastic response (FSI) according to EN 1993-1-1:2005.
Element types used in the model: BEAM4 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: CFVR1072.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR1072' /TITLE, %NomFile%, Seismic margin in structural steel check according to EC3-05 ! --------------------------------------------------------------------------------- ! Model definition and solve ! --------------------------------------------------------------------------------- ! parameters DUCT = 1.3 FACT = 0.35 FY_NS = -75.*FACT MZ_NS = 10.*FACT MX_NS = -5.*FACT FY_S = -250.*FACT MZ_S = 50.*FACT MX_S = -30.*FACT ! CivilFEM Setup: Code & Units ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,KN ~CODESEL,EC3-05,EC2-08,,,EC8-94 /PREP7 ! Preprocessor ! -------------------------------------------------- ! Materials ~CFMP,1,LIB,STEEL,EC3,Fe 430 ! Element Types ET,1,BEAM4 ! Type 1: 3D Beam ! Cross Sections ~SSECLIB,1,1,1,17 ! IPE 550 ~SECMDF,1,EC3PROP,DUCT,,DUCT ! Member properties ! ~MEMBPRO,1,EC3,ALL, L, K, KW, C1, C2, C3, CMY, CMZ, CMLT,PSIVEC,LATB,CFBXY,CFBXZ,CHKAX ~MEMBPRO,1,EC3,ALL,10,1.000,1.000,1.879, 0.0, 0.0, 0.6, 0.6, 0.6, 0.5, 1, 1.0, 1.0, 0, ! Beam properties ~BMSHPRO,1,BEAM,1,,,,4,1,0,, ! Nodes N,1,0.,0. N,2,0,10. ! Elements E,1,2 EPLOT /SOLU ! Solution ! -------------------------------------------------- ! Displacements D,1,UX D,1,UY D,1,UZ D,2,UX D,2,UZ D,ALL,ROTY ~CFSAVE,%NomFile% FINISH /FILNAME,NON_SEISMIC ~CFRESUM,%NomFile% /SOLU F,2,FY,FY_NS F,1,MZ,MZ_NS F,1,MX,MX_NS SOLVE FINISH /FILNAME,SEISMIC ~CFRESUM,%NomFile% /SOLU F,2,FY,FY_S F,1,MZ,MZ_S F,1,MX,MX_S SOLVE FINISH /FILNAME,NON_SEISMIC /POST1 ~CFSET,,1,1 ~CFFILE2,4,SEISMIC.RCV ~HCLPFST,BUCK_BCM,-Z,PARTIAL,,1,1 ~PLSHCLP,FSE ~CFGET,FSE, ELEMENT, 1 ,RESULT , FSE, I, , , 1 ~CFSAVE,%NomFile% FINISH /FILNAME,SEISMIC_SCALED ~CFRESUM,%NomFile% /SOLU F,2,FY,FY_S*FSE F,1,MZ,MZ_S*FSE F,1,MX,MX_S*FSE SOLVE FINISH /FILNAME,NON_SEISMIC /POST1 ~CFSET,,1,1 ~CFFILE2,4,SEISMIC_SCALED.RCV ~HCLPFST,BUCK_BCM,-Z,PARTIAL,,1,1 !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! arrays NComp = 2 NComp_ch = 0 *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) = 'DUCT' LABEL(2) = 'FSE' ! correct data VALUE(1,1) = DUCT VALUE(2,1) = 1. ! CivilFEM data ~CFGET,VALUE(1,2),SECTION,1,EC3PROP,DUCT ~PLSHCLP,FSE ~CFGET,VALUE(2,2), ELEMENT, 1 ,RESULT , FSE, I, , , 1 ! results comparison TOLER(1,1) = 1.E-6*ABS(VALUE(1,1)) TOLER(1,2) = TOLER(1,1) TOLER(2,1) = 5.E-2*ABS(VALUE(2,1)) TOLER(2,2) = TOLER(2,1) COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| DUCT | 1.3 | 1.3 | 1.000 | 1.3e-006 |
| FSE | 1 | 1 | 1.000 | 0.05 |
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