Title:
High Temperature Residual Properties of Externally-Bonded FRP Systems
Author(s):
S.K. Foster and L.A. Bisby
Publication:
Symposium Paper
Volume:
230
Issue:
Appears on pages(s):
1235-1252
Keywords:
fiber-reinforced polymers; fire; high-temperature residual properties; reinforced concrete; strengthening
DOI:
10.14359/14891
Date:
10/1/2005
Abstract:
The use of externally-bonded FRP plates and sheets to strengthen existingreinforced concrete structures is now widely recognized. However, a primary concernthat still discourages the use of FRPs in some cases is their assumed susceptibility tofire. While recent studies have demonstrated that the overall performance ofappropriately designed and insulated FRP-strengthened reinforced concrete membersis satisfactory, the specific behavior of FRP materials at high temperature and afterexposure to high temperature remains largely unknown, particularly for externally-bonded FRP strengthening systems. As a first step in an effort to learn more about thehigh temperature properties of these systems, an initial series of tests is presented tostudy the high temperature residual properties of externally-bonded carbon and glassFRP systems for concrete. Axial tension tests, single-lap bond tests, thermogravimetricanalysis, and differential scanning calorimetry are all used to elucidate hightemperature residual performance. The potential consequences of these initial resultsfor the fire-safe design of FRP-strengthened reinforced concrete members arediscussed.