Title:
Performance and Load Rating of Old/Damaged Girder Bridges
Author(s):
Mostafa Tazarv
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/23/2022
Abstract:
Precast prestressed double-tee girder bridges have been frequently used in South Dakota and the neighboring states especially on local roads. Double-tee bridges are cost-effective and are easy to construct and install. Nevertheless, many of these bridges are deteriorating due to insufficient detailing and environmental conditions. Two 45-year-old double-tee girders, one 30-ft (9.14-m) and another 50-ft (15.24-m) long, were extracted from a bridge in Rapid City, SD, and were tested to failure at the Lohr Structures Laboratory at South Dakota State University. The salvaged girders, as received, had extensive damage such as exposure of tendons, loss of stem concrete, and flange concrete spalling. The presentation will highlight the findings of the experimental study and discuss a methodology proposed to load rate damaged double-tee girder bridges.