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Re: FEMA 350

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Zeff = Zgross-2*c*tf(d-tf)

Javier Encinas

Quoting Kipp.A.Martin(--nospam--at)us.mwhglobal.com:

> One of my engineers is working on a project that needs to meet the
> requirements of FEMA 350.  We are slowly working our way through the
> requirements, but came upon a question that we couldn't figure out.  On
> page 3-6, in equation 3-1, there is a term Ze (Z sub e).  This is defined
> as the effective plastic modulus for the beam at the location of the
> plastic hinge.  How do I determine Ze?  Is it the Z that is given in the
> LRFD manual? Or does it need to be decreased (or increased) by some factor?
> I've looked in the LRFD manual, but I can't find an equation that defines
> how to determine Ze.
> 
> --Kipp Martin, SE
>   MWH Americas
>   Portland, Oregon
> 
> 
> 
> 
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