Periods

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nicola27
Posts: 42
Joined: Wed Aug 22, 2012 8:10 am
Location: PUCP Lima

Periods

Post by nicola27 »

I'm doing a nonlinear analysis with accelleregramma of a reinforced concrete frame.
I used non-linear elements and sections in fiber concrete01 and steel02.
When I calculate the proportional damping, calculation periods and frequencies.
The time that I find myself using the nonlinear elements is different from that calculation period with the elastic elements, why?
When I use the nonlinear elements such as OpenSees calculates the period, such as stiffness use it?
Must be the same?
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