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Re: Vertical component of EQ in UBC97 and IBC2000

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There was some research on in-structure vertical response for non-structural components on some failed components. The demand greatly exceeded the capacity.

Harold Sprague

From: Christopher Wright <chrisw(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: Re: Vertical component of EQ in UBC97 and IBC2000
Date: Tue, 9 Nov 2004 10:50:47 -0600

On Nov 9, 2004, at 10:23 AM, Harold Sprague wrote:

On one such structure, I noted an acceleration due to the response of the structure was an increase by a factor of 4 over the free field vertical ground motions.
One other thing. Has anyone looked at the structure frequencies and compared them with response spectra of the vertical motion?

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)    | this distance" (last words of Gen.
...................................| John Sedgwick, Spotsylvania 1864)

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