And in case; is it nessesary to define the gravity load in a special way?
Unlike:
pattern plain 1 constant {....}
My output values doesn't seem to affected by the P-Delta transformation
Code: Select all
# GEOMETRIC TRANSFORMATION
geomTransf PDelta 1
# DEFINE DISPLACEMENT BEAM-COLUMN ELEMENTS
# Columns
# tag ndI ndJ nPts secID transf
element dispBeamColumn 1 1 2 $nP 2 1
element dispBeamColumn 2 2 3 $nP 2 1
element dispBeamColumn 3 4 5 $nP 1 1
element dispBeamColumn 4 5 6 $nP 1 1
element dispBeamColumn 5 7 8 $nP 2 1
element dispBeamColumn 6 8 9 $nP 2 1
# Beams
element dispBeamColumn 7 2 5 $nP 3 1
element dispBeamColumn 8 5 8 $nP 3 1
element dispBeamColumn 9 3 6 $nP 3 1
element dispBeamColumn 10 6 9 $nP 3 1
# CONSTANT GRAVITY LOADS
pattern Plain 1 Constant {
# node FX FY MZ
load 2 0.0 -0.96e1 0.0
load 5 0.0 -1.92e1 0.0
load 8 0.0 -0.96e1 0.0
load 3 0.0 -0.48e1 0.0
load 6 0.0 -0.96e1 0.0
load 9 0.0 -0.48e1 0.0
}
pattern Plain 2 Linear {
# node FX FY MZ
load 2 $load 0.0 0.0
load 3 $load 0.0 0.0
}
# FINITE ELEMENT ANALYSIS MODEL
integrator DisplacementControl 3 1 1
test NormDispIncr 1.0e-06 10 0
algorithm Newton
numberer RCM
constraints Transformation
system ProfileSPD
sensitivityIntegrator -static
sensitivityAlgorithm -computeAtEachStep
analysis Static
# RECORDERS
recorder Node Node.out disp -time -node 3 -dof 1
recorder Element 1 3 5 -file Element.out section 1 deformations
analyze 500