Seismosoft | Earthquake Engineering Solutions

Hello,

I am trying to do my own verification against experimental results, however, I am facing a common issue which is that all seismostruct results are very pinched at the center compared to the experimental graphs. I have tried changing the curve parameters for the steel as I have read in the manual that those may affect pinching, but I have seen no difference when changing those. Any advice for this situatuon?

Changing the concrete confinement factor usually affects the pinching effect in the hysteretic diagrams.
Seismosoft Support

Based on my Seismostruct knowledge, the confinement factor is automatically calculated based on the confinement selected, and I am sure of the confinement details I have entered.

Is there way to change that factor manually?

Dear Ralazem,

You may edit the section, select the Sections Characteristics tab, deselect the Automatic Calculation of Confinement Factors check-box and assign the value you want to.

I have attempted that and there is no change in the pinching effect. Are there any other factors that may affect it?

Other parameters are the ratio of the longitudinal reinforcement, the axial load the existence and not of P'delta effects,
Seismosoft Support