Modelling an Infill frame

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nrojas
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Joined: Tue Nov 10, 2009 4:27 am
Location: University of Puerto Rico

Modelling an Infill frame

Post by nrojas » Mon Jul 04, 2011 8:34 am

Hi !!!!

Can any body tell me how I can model an Infill frame? I have tried using a diagonal truss element with an uniaxial material specified for the behavior of the infill wall but it is not following the envelope of the material.n There is another way to achieve that? Can somebody help me?

fmk
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Location: UC Berkeley
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Re: Modelling an Infill frame

Post by fmk » Mon Sep 12, 2011 1:14 pm

there is an example in the examples:

http://opensees.berkeley.edu/wiki/index.php/Examples

abolfazlabedi
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Joined: Sun Nov 06, 2011 6:25 am
Location: Shahid Bahonar University Of Kerman
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Errors in 3D truss modelling or analysis

Post by abolfazlabedi » Wed Nov 09, 2011 8:17 am

Hi to all.
My goal is doing an IDA analysis on Domes (spatial/space one), but in modelling I faced errors in doing a simple linear static analysis.
Errors like these:
"WARNING BandGenLinLapackSolver::solve<> -LAPACK routine returned 8
WARNING NewtonRaphson::solveCurrentStep<> -the LinearSysOfEqn failed in solve <>
StaticAnalysis::analyze<> - the Algorithm failed at iteration: 0 with domain at load factor 0.1
OpenSees > analyze failed, returned: -3 error flag
done with analysis"

I made a simple 3D truss for solving this error more easily.
Can you check this model in OpenSees and solve its problem?
I know this is a big requeat from me but it's very important.
Thank you so much.
# Units: kg, m, sec
model BasicBuilder -ndm 3 -ndf 6
node 1 0 0 1
node 2 0 1 0
node 3 1 0 0
node 4 1 1 0
node 5 0 0 0
fix 2 1 1 1 0 0 0
fix 3 1 1 1 0 0 0
fix 4 1 1 1 0 0 0
fix 5 1 1 1 0 0 0
pattern Plain 1 "Linear" {
load 1 0.0 0.0 -1 0.0 0.0 0.0
}
puts "ok1"
mass 1 0.5 0.5 0.5 0.000000001 0.000000001 0.000000001
uniaxialMaterial Steel02 1 24e6 2.1e10 0.01 10 0.925 0.15 0.005 0.01 0.005 0.01
element truss 1 1 2 0.001 1
element truss 2 1 3 0.001 1
element truss 3 1 4 0.001 1
element truss 4 1 5 0.001 1
constraints Transformation
numberer RCM
system BandGeneral
test NormDispIncr 1.0e-6 30
algorithm Newton
integrator LoadControl 0.02
analysis Static
recorder Node -file nodeDisp.out -load -node 1 -dof 1 2 disp
analyze 1
print node 1

fmk
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Re: Modelling an Infill frame

Post by fmk » Thu Dec 15, 2011 12:32 pm

the solver failed because you don't have the boundary conditions correct. i suggest you look at the example online.

http://opensees.berkeley.edu/wiki/index ... ss_Example

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