concrete problem

[felipe_cordero]

Hello,

I'm working with big fiber section models for my thesis. I'm running pushover and time-history analysis and I'm getting really rare results (rare deformation and base reaction about twice or more times bigger than pushover). Trying to figure out what is the trouble, I decided to see what is happening with concrete.

And working with a little model 'im getting really rare behavior for cyclic loading

all codes are here: http://www.cec.uchile.cl/~fecorder/concrete.zip

The main file is concrete04.tcl. It performs a cyclic compresion and tension analysis over a simple zerolength element to observe what is happening with the response of the material.

And I'm getting, for example for concrete02, the following response: http://www.cec.uchile.cl/~fecorder/concrete02.png

I'm working with the last OpenSees release.

Thanks for any help, especially from developers.

[vesna]

What you are getting as a result is the way Concrete02 is. Please look at:
http://opensees.berkeley.edu/wiki/index ... _Softening
and you will see the same response.

[felipe_cordero]

Yes, you are right. I've been having problems on cyclic behavior. However, I'll be here soon with more questions and asking for help

Thanks.