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what is the so-called rigid body mode? is that caused by usage of rigidLink in model?

thank you very very much!!

what is the meaning of "WARNING BandGenLinLapackSolver::solve<> -LAPACK routine returned 1", after i run the program? how to solve the problem of convergence like this?

i understood, it means input is consistent with the output.

Are the default units in opensee international units or British measurement units?

there is hoops to confine concrete in columns. the parameters of concrete in the example 4 is plain concrete's parameters or confined concrete's parameters by some model, such as Mander model?

thank you very much
Silvia

thanks
Silvia

I am modeling columns with unbonded prestressing steels, using nonlinear beam-column elements. Obviously, using steel layer in fiber section is not appropriate because of the unbonding and the pretressing. Is there an special element to simulate the unbonden pretressing steels in columns when the st...

I have done pushover analysis about 2D cantilever column(displacement control), but then how can I load a negative displacement for cyclic analysis ?

Thanks