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

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--- james korff pe pmp <seaoc(--nospam--at)yahoo.com> wrote:
> Date: Tue, 27 Jul 1999 02:03:14 -0400 (EDT)
> From: james korff pe pmp <seaoc(--nospam--at)yahoo.com>
> Subject: Drift at top and rotation/curvature in plastic hinge zone
> To: Ben Yousefi <ben.yousefi(--nospam--at)ci.sj.ca.us>
> CC: seaint-ad(--nospam--at)seaint.org
> 
> Ben,
> 
> Thank you for your precise and concise responses to questions posed
> on
> the SEAOC list server.
> 
> They have been very useful.
> 
> I attended the workshop you presented on UBC 1997 Structural in San
> Jose, and left with one question - or should I say - one basic
> question.
> 
> We had talked about the change in allowable drift from 0.005 to 0.025
> .
> 
> 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?
> 
> When one performs a moment curvature analysis, one gets the maximum
> rotation and curvature, but not necessarily the deflection (drift) at
> the top.
> 
> Thank you in advance for any comments.
> 
> Jim Korff, PE
> 
> ===
> James Korff, PE, PMP
> Structural Composite Consultants
> 985 E. Hillsdale Blvd, Suite 128, Foster City, CA 94404
> Phone 650-796-8997 / Fax 650-345-1355
> 
> "May the DISPLACEMENT be With You !!"
> _________________________________________________________
> Do You Yahoo!?
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> 
> 

===
James Korff, PE, PMP
Structural Composite Consultants
985 E. Hillsdale Blvd, Suite 128, Foster City, CA 94404
Phone 650-796-8997 / Fax 650-345-1355

"May the DISPLACEMENT be With You !!"
_________________________________________________________
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