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# ANSYS APDL Nonlinear Transient Analysis (Apply Ground Motion)

## ANSYS APDL Nonlinear Transient Analysis (Apply Ground Motion)

(OP)
Hello. I'm currently investigating the behavior of a heritage structure during an earthquake in APDL. Is it right to simulate the effect of earthquake load by accelerating the base using ground motion data (acceleration vs time)? How about the effect of gravity as well as the boundary conditions at the ground level? Right now, I already developed a command based on other forums that I read but I'm not really sure about this. Thank you.

/SOLU
FILE = â€˜accelvalidate1â€™
DT = 0.01
SKIP = 0
/INQUIRE,NUMLINES,LINES,FILE,TXT
*DEL,ACCEL,,NOPR
*DIM, ACCEL,TABLE, READ - 1, 3
ANTYPE, TRANS
TRNOPT,FULL
TIMINT,ON,STRUC
ACEL,0,9.806,0
KBC,0
OUTRES,ALL,1
OUTPR,BASIC,ALL
NSUBST,1,,,1
*do,i,1,NT
TIME,i*DT
CMSEL,ALL
NSEL,S,LOC,Y,0
DDELE,ALL,ACCX
DDELE,ALL,ACCY
DDELE,ALL,ACCZ
D,ALL,ACCX,ACCEL(i,1)
D,ALL,ACCY,ACCEL(i,2)
D,ALL,ACCZ,ACCEL(i,3)
ALLSEL
SOLVE
*enddo

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