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Re: Conc. Col. Retrofit using Carbon Fiber/Tevlar Wrap & Caltrans

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In addition to Frieder Seible, you might want to contact Vistaph
Kharbari, who is also at UCSD where a lot of the research for CALTRANS
was done on the column retrofits.  Dr. Kharbari is the resident
composites expert for the dept.  Both of the professors mentioned are in
the structural engineering department at UCSD.

David Taquino
Libby Engineers, Inc.
(UCSD alumni)

P. & S. Guthrie wrote:
> Thanks to everyone for the feedback both here & to my office email.
> Two people I spoke with had glass fiber wrap products that have been
> approved by Caltrans, if that certification is required for your particular
> application.  It appears that the Carbon fiber wrap may be 2 to 3 times the
> cost of the glass fiber wrap, and the steel cans seem to be for round
> columns (square columns in my case).  Carbon wrap is said to be
> particularly appropriate where moisture/water is an issue (underground pipe
> systems for example).
> More Thanks,
> Paul Guthrie, PE
> San Luis Obispo, CA
> Cannon Associates
> fax (805) 544-3863
> voice (805) 544-7407
> email  paul.guthrie(--nospam--at)
> ----------
> From: Rlfong(--nospam--at)
> To: seaint(--nospam--at)
> Subject: Re: Concrete Column Retrofit using Carbon Fiber/Tevlar Wrap
> Date: Friday, February 05, 1999 6:11 PM
> In a message dated 2/5/99 4:09:22 AM Pacific Standard Time, Nd1942(--nospam--at)
> writes:
> > If it's so well researched, how come I never see Caltrans using it?
> CALTRANS has used it.  Check some of the freeway seismic retrofits in the
> SF
> Bay Area.
> Ron Fong
> Fremont,  CA