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Re: Drift at top and rotation/curvature in plastic hinge zone

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-----Original Message-----
From: james korff pe pmp <seaoc(--nospam--at)yahoo.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Monday, July 26, 1999 11:10 PM
Subject: Fwd: Drift at top and rotation/curvature in plastic hinge zone


>
>

>> My question is, for columns that can obtain this displacement at the
>> top via the formation of a plastic hinge at the bottom, what is the
>> mathematical and/or geometric relationship between the displacement
>> at
>> the top, measured in inches (% of Height) and the rotation (radians)
>> and curvature in the plastic hinge region Lp formed at the bottom of
>> the column?
>>
>> Are there any assumptions that have to be made to resolve this
>> situation?
See Priestly's book  Seismic Design of Concrete and Masonry Buildings for
helpful assumptions, but the direct simplified answer to your question is
that deflection = rotation x height.