01046998

Monograph

http://onlinepubs.trb.org...y/NCHRP97_Final_Report.pdf

This Innovations Deserving Exploratory Analysis (IDEA) project evaluated the use of fiber-reinforced plastic (FRP) fabrics as restrainers for seismic rehabilitation of highway bridges as an alternative to steel restrainers to reduce bridge hinge movement during earthquakes. Glass, carbon, and glass/carbon hybrid restrainers were fabricated and evaluated in large-scale dynamic laboratory tests. The research work involved (i) tensile tests on FRP strips and on FRP/concrete bond at various loading rates, (ii) FRP restrainer development and dynamic testing, (iii) shake table tests, data analysis, and performance comparison for FRP, steel, and shape memory alloy (SMA) restrainers, and (iv) development of a FRP restrainer design method. The results showed that the FRP strength was insensitive to strain rates and that the FRP/concrete bond was a function of concrete shear strength but insensitive to strain rates. The results also demonstrated feasible methods for flexible restrainer construction and restrainer/concrete bonding. A simplified FRP restrainer design method, considered more realistic than that of AASHTO was proposed that takes into account the dynamic characteristics of a bridge structure.

This NCHRP-IDEA investigation was conducted by the University of Nevada, Reno. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

TRB-NCHRP-97

English

101p

2005-1

NCHRP-IDEA Program Project Final Report

Final Report

August 2003 - April 2005

Print

References (44) ; Tables (29)

Bond strength (Materials); Design methods; Dynamic tests; Earthquake resistant design; Fiber reinforced plastics; Highway bridges; Laboratory tests; Retrofitting; Shaking table tests; Shear strength; Technological innovations; Tension tests

Innovations Deserving Exploratory Analysis (IDEA) (Program)

Restrainers (Bridges)

Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I35: Miscellaneous Materials

TRIS, TRB

Apr 25 2007 2:35PM