Moment-curvature of a non-symmetric section

[ele_cam]

Hi everybody,

I would like to model in OpenSees a non-symmetric cross-section, i.e the positive and negative bending moments are different. I already know the bending moment vs curvature diagrams and I can can discretize them in trilinear curves.

How can I assign a uniaxialMaterial to the cross-section that reproduces these trilinear curves?

Thanks for your help!
Elena

[fmk]

try hysteretic or multilinear material:

http://opensees.berkeley.edu/wiki/index ... c_Material
http://opensees.berkeley.edu/wiki/index ... r_Material

with a section aggregator section:
http://opensees.berkeley.edu/wiki/index ... Aggregator