If you're using a manual computation, the solution is like solving for the
centroid of a section. That is taking summation of an area*distance to a
specified point. (A(total)*xbar=S(An*xn)). But the area would be changed to
the moment of Inertia. You can then compute for the center of rigidity.
> From: rlewis(--nospam--at)techteam.org[SMTP:rlewis(--nospam--at)techteam.org]
> Reply To: seaint(--nospam--at)seaint.org
> Sent: Friday, May 14, 1999 4:16 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Concrete Frame Rigidity
> I need a refresher course in lateral load distribution. I need to find
> center of rigidity of a concrete frame building. I can't find a reference
> that illustrates how to do this. All I find is concrete/masonry wall
> I have a 2 story concrete framed structure in the Dominican Republic. I
> to locate the center of rigidity. Unfortunately the structure and framing
> not symmetrical so I need to calculate rigidity of the concrete frames.
> is also irregular in plan. I know rigidity is the reciprocal of
> but is there an easy way to calculate this for rigid frames?
> I appreciate all insight into this topic.
> Richard Lewis, P.E.
> Missionary TECH Team
> The service mission like-minded Christian organizations
> may turn to for technical assistance and know-how.