A question about output

[liwei]

I build a simple model with two truss elements.But when I souced it , the output file just gave nothing but the number 1 like this "1 ".I know the number "1" should be the analysis step. But I cannot get the internal force of truss elements. Why??

model basic -ndm 2 -ndf 2
reliability

node 1 0.0 0.0
node 2 10.0 1.0
node 3 20.0 0.0

set E 200.0
set P 18.0
set A 250.0


uniaxialMaterial Elastic 1 $E
#uniaxialMaterial Elastic 1 $E

section Uniaxial 1 1 P

# GEOMETRIC TRANSFORMATION
# geomTransf Corotational 1

element truss 1 1 2 $A 1
element truss 2 2 3 $A 1

fix 1 1 1
fix 2 0 0
fix 3 1 1

pattern Plain 1 Linear {
load 2 0.0 $P
}

recorder Element -file ele1global.out -time -ele 1 globalForce

constraints Plain
numberer RCM
test NormUnbalance 1.0e-6 25 0
integrator LoadControl 1 1 1 1
algorithm Newton
system ProfileSPD
sensitivityIntegrator -static
sensitivityAlgorithm -computeAtEachStep
analysis Static
analyze 1

[liwei]

Sorry, the souce code has some question.


This the new one:
model basic -ndm 2 -ndf 2

node 1 0.0 0.0
node 2 10.0 1.0
node 3 20.0 0.0

set E 200.0
set P 18.0
set A 250.0


uniaxialMaterial Elastic 1 $E



element truss 1 1 2 $A 1
element truss 2 2 3 $A 1

fix 1 1 1
fix 2 0 0
fix 3 1 1

pattern Plain 1 Linear {
load 2 0.0 $P
}

recorder Element -file ele1global.out -time -ele 1 globalForce


constraints Plain
numberer RCM
test NormUnbalance 1.0e-6 25 0
integrator LoadControl 1 1 1 1
algorithm Newton
system ProfileSPD
analysis Static

analyze 1

[silvia]

the truss does not take the globalForce argument. see the manual, please.

[liwei]

Thanks!
But I need know internal force of truss elements. How can I find it?

[silvia]

please see the manual, either at the element or at the recorder, or both.

[liwei]

, Thanks a lot .