Topic: Help modelling reinforced concrete (plane stress elements + trusses)
Hello,
We are trying to create a model of a reinforced concrete structure using OOFEM. So far we have been able to get the model to run properly when it is only concrete, without the added reinforcement, but when we add steel trusses to simulate rebars, the analysis fails.
Could someone please assist us in coming up with a solution?
This is the input file we are using (note that this is a simplified version of the model we are working on, but it is giving the same problem as the more complex model):
Plane stress rectangular element, simply supported at the bottom,
with trusses going from nodes 1-4 and 2-3:
| |
V______V
| |4 3| |
| | | |
| |1____ 2| |
^ o
rcsquare.out
test to determine how to create a model of RC
nonlinearstatic nsteps 11 rtolv 0.001 MaxIter 500 controllmode 1 stiffMode 1 manrmsteps 1 contextOutputStep 1 nmodules 1
vtkxml tstep_all domain_all primvars 1 1 vars 1 1 ipvars 1 1
domain 2dPlaneStress
OutputManager tstep_all dofman_all
ndofman 4 nelem 3 ncrosssect 2 nmat 2 nbc 2 nic 0 nltf 2
node 1 coords 3 0 0 0 bc 2 1 1
node 2 coords 3 1 0 0 bc 2 0 1
node 3 coords 3 1 1 0 bc 2 0 2
node 4 coords 3 0 1 0 bc 2 0 2
PlaneStress2d 1 nodes 4 1 2 3 4 crossSect 1 mat 1
Truss2d 2 nodes 2 1 4 mat 2 crossSect 2
Truss2d 3 nodes 2 2 3 mat 2 crossSect 2
SimpleCS 1 thick 0.15
SimpleCS 2 area 0.0005
MazarsModel 1 d 0.0 E 18602.98E6 n 0.18 e0 0.0002 ac 1.33 bc 1260.0 at 0.97 bt 10000.0 version 0 maxOmega 0.99999 tAlpha 0.0
Steel1 2 d 1. E 200000 n 0.3 tAlpha 0.0 Ry 400
BoundaryCondition 1 loadTimeFunction 1 prescribedvalue 0.0
BoundaryCondition 2 loadTimeFunction 2 d -0.001
ConstantFunction 1 f(t) 1.0
PiecewiseLinFunction 2 nPoints 2 t 2 0. 10. f(t) 2 0. 1.