Hello!
I run a static analysis for gravity loads for a 3-story 3-bayx 4-bayz building. I have 3 elements per beam and 2 elements per column. Because of that I use "dispBeamColumn" elements with fiber sections.
For the analysis I have the script below:
# Gravity-analysis parameters -- load-controlled static analysis
set Tol 1.0e-8;
constraints Lagrange ;
numberer RCM;
system BandGeneral ;
test NormDispIncr $Tol 10 ;
algorithm Newton;
set NstepGravity 10;
set DGravity [expr 1.0/$NstepGravity];
integrator LoadControl $DGravity 1 $DGravity $DGravity;
analysis Static;
analyze $NstepGravity;
and during analysis the message posted below appears:
goGravity
WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 1
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
Model Built
OpenSees >
BandArpackSolver::Error in dgbtrf_
Warning FrequencyAlgo::solveCurrentStep() - the EigenSOE failed in solve().
EigenAnalysis::analyze() - algorithm failed
missing function argument at _@_
in expression "pow(_@_,0.5)"
OpenSees >
the failure of both solvers should indiacte to you that your model is incorrect, either you don't have enough constraints or your connectivity is not what you think it to be.
About the constraints, all the base nodes are fixed and there is a rigid diaphragm for all the nodes at each floor (including the nodes at the ends of all the three parts each beam is seperated). Now, the nodes from the division of the columns are not constrained at all....
Do you think there might be a problem with this??
do you have master nodes for the rigid diaphragm .. if so if they don't have elements connected to them do you have the dof in the non-diagphragm directions constrained for these nodes?
Thank you very much...
I'll check again nodes and member connectivity!!
One more question, can I source my tcl files (Model Build, Analysis) with BuildingTcl Release 1.9 and watch my results graphically?? Do you have any manual for this???