# Abaqus

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ABAQUS Tutorial

by Shi-Yu Xu Shi-

Creating the Mesh
*NODE, NSET=WholeModel NODE, NSET=WholeModel 30 **10, 0.0, 0.00, 0.0 28 20, 0.0, 0.00, 0.0 28 30, 0.0,3.048, 0.0 26 ** node#,X,Y,Z 26 *NGEN, NSET=BENT_COL NGEN, NSET=BENT_COL 24 20, 30, 2 24 st node#, 2nd node#, increment in the # ** 1 22 *NSET, NSET=Enforced_node , 22 Y 20 30 20 *ELEMENT,TYPE=B31 ELEMENT,TYPE=B31 20, 20, 22 , , Z ** ele#, 1st node, 2nd node *ELGEN, ELSET=BENTCOL_M_phi ELGEN, ELSET=BENTCOL_M_phi , , , 20,5, 2, 2 ** Master ele #, # of eles to be defined, Increment in node #, Increment in ele #

X

http://abaqus.civil.uwa.edu.au:2080/v6.7/

Defining the Nonlinear Beam-Column Element BeamSet SECTION=GENERAL (default) for linear beam; Set SECTION=NONLINEAR GENERAL for NL beam. *BEAM GENERAL SECTION,DENSITY=2405.0, SECTION=NONLINEAR SECTION, n1 GENERAL, ELSET=BENTCOL_M_phi GENERAL, ELSET=BENTCOL_M_phi A T T h 1.1678, 0.1085, 0.0, 0.1085, 0.2169 A, I11, I12, I22, J 0.0, 0.0, -1.0 Direction cosines of t1 axis t1 *AXIAL, LINEAR AXIAL, 2.899E10, Axial stiffness t2 *M1 Y 0.0000E+00, 0.0000E-00 0.0000EM 2.7937E+05, 2 7937E+05 8.2008E 8 2008E-05 8.2008EX 5.5857E+05, 1.6406E-04 1.6406EZ …… *M2 φ …… *TORQUE,LINEAR TORQUE, 2.244E9, Torsion stiffness *TRANSVERSE SHEAR STIFFNESS 1.075E10, 1.075E10 Shear stiffness K23, K13

Spring and Dashpot Elements
28 *ELEMENT, TYPE=SPRING2, ELSET=S2 ELEMENT, TYPE=SPRING2, 201, 10, 20 *SPRING, ELSET=S2 SPRING, ELSET S2 2, 2 1.E14, 230 *ELEMENT, TYPE=DASHPOT2, ELSET=C1 ELEMENT, TYPE=DASHPOT2, 300, 10, 20 301, 110 301 110, 120 302, 210, 220 303, 310, 320 *DASHPOT,ELSET=C1 DASHPOT, 1, 1 1.5589E7, 228 228 226 226 224 224 222 222 220 220 210 26

30 28 130 26 24 24 22 22 20 20 10

128 128 126 126 124 124 122 122 120 120 110

UserUser-Defined Element (UEL)
*USER ELEMENT, NODES=2, TYPE=U1, PROPERTIES=3, I PROPERTIES=1, ELEMENT, TYPE=U1, PROPERTIES=3, PROPERTIES=1, COORDINATES=3, VARIABLES=14 1,2,3 *ELEMENT, TYPE=U1, ELSET=NLSPRING ELEMENT, k2 QD 102, 1, 2k1 *UEL PROPERTY, ELSET=NLSPRING PROPERTY, 1.84E+9, 1 84E+8 1 79676E+7 1 84E+9 1.84E+8, 1.79676E+7, 1 PROPERTIES I PROPERTIES

NODES=2: number of nodes connected to the UEL TYPE=U1: TYPE=U1: label of the UEL PROPERTIES=3: PROPERTIES=3: number of floating point number parameters required by the UEL I PROPERTIES=1: number of integer number parameters required by the UEL PROPERTIES=1:COORDINATES=3: maximum number of active DOFs at each node VARIABLES=14: number of solution-dependent state variables used by the UEL solution-

Miscellaneous
*DAMPING, ALPHA=0.6641, BETA=0.001884 DAMPING, *ELEMENT, TYPE=MASS, ELSET=M1 ELEMENT, TYPE=MASS, 801, 30 801 *MASS, ELSET=M1 MASS, 389571. *AMPLITUDE, NAME=linear pushover DEFINITION=TABULAR AMPLITUDE, NAME linear_pushover, DEFINITION TABULAR 0.00,0.00, 10.00, 1.00, Amp. 1

10 *AMPLITUDE, NAME=accel_ctrl, INPUT=ElCentro033x_ABAQUS.txt AMPLITUDE, *BASELINE CORRECTION

t

Data Output
*NSET, NSET=ColTOP NSET, S T C lT S T 30, *NSET, NSET=ColBOTTOM NSET, 20, , *NSET, NSET=FNDNbase NSET, 20, *NSET, NSET=Nopt1 NSET, ColTOP, C lBOTTOM FNDNb C lTOP ColBOTTOM, FNDNbase *ELSET, ELSET=ELopt1 ELSET, 20,
*OUTPUT, FIELD, FREQ=1 OUTPUT, *NODEFILE, FREQUENCY=1, NSET =Nopt1 FILE, U *NODE FILE, FREQUENCY=1, NSET =FNDNbase FILE, RF *OUTPUT, HISTORY, FREQUENCY=1 OUTPUT, *NODE OUTPUT, NSET=Nopt1 OUTPUT, U1, U2, U3 *NODE OUTPUT, NSET=FNDNbase OUTPUT, RF1, RF2, RF3, RM1, RM2, RM3 *ELEMENT OUTPUT, ELSET=ELopt1 OUTPUT, SF1, SF2, SF3, SM1, SM2, SM3

30 28 28 26 26 24 24 22 22 20 20

Output to .fil file Must compose Fortran subroutine to read.Output to .obd file p Can be post-processed in CAE.

28 *NSET, NSET=ColTOP NSET, 30, *NSET, NSET=FNDNbase NSET, NSET FNDNbase 20, *STEP STEP 0 - GRAVITY LOAD *STATIC 1.0E1.0E 10, 10 0 1 0E-10 10.0, 0E*BOUNDARY COLTOP, 3, 5 FNDNbase , 1, 6 1 *DLOAD , GRAV, 9.81, 0, -1,0 *END STEP 26

30 28 26 24 24 22 22

**Applying gravity load in 10 secs. Initial time increment...