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RE: Externally Bonded FRP Systems for Strengthening Concrete Structures

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I will offer one caution regarding designing for FRP strengthening of
existing structures: ACI 440.2R and many manufacturer's recommend that
the existing structure be able to resist a minimum level of applied
loads without the FRP stiffening in place.  This is just in case the FRP
surface repair debonds.  I had a case where existing rebar had corroded
severely and could not be counted on for any appreciable strength.  I
was told that FRP stiffening to replace the missing reinforcing area was
not recommended in that case.  

William C. Sherman, PE
(Bill Sherman)
CDM, Denver, CO
Phone: 303-298-1311
Fax: 303-293-8236
email: shermanwc(--nospam--at)


	From: ranmoo [mailto:ranmoo(--nospam--at)] 
	Sent: Thursday, June 02, 2005 9:04 PM
	To: seaint(--nospam--at)
	Subject: Externally Bonded FRP Systems for Strengthening
Concrete Structures
	I see that ACI offers  "440.2R-02: Design and Construction of
Externally Bonded FRP Systems for Strengthening Concrete Structures"
..... has anyone used this code or have any direct experieince with
using FRP as a means of strengthening exisitng structures.  
	Additionally, are you aware of any additonal design resources
for this type of application of externally applied FRP?  Texts?
Reference Guides??
	Randall Moore, PE SE
	Wilmington NC

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