United States Department of Transportation
i
Advanced bridge safety initiative : recommended practices for live load testing of existing flat-slab concrete bridges - task 5.
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2012-12-01
[PDF-536.81 KB]
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Abstract:Current AASHTO provisions for load rating flat-slab concrete bridges use the equivalent strip
width method, which is regarded as overly conservative compared to more advanced analysis
methods and field live load testing. It has been shown that live load testing of bridges can
provide more accurate responses and can be used to calculate less conservative load rating
factors. Amer et al (1999), Jáuregui et al. (2010), Poulin (2012) and Saraf (1998) have all
demonstrated the benefits of non-destructive testing for the load rating of flat-slab concrete
bridges.
This document is a guide that provides additional recommendations on accepted AASHTO
procedures and for live load testing of flat-slab concrete bridges. Sections 2 – 6 give specific
recommendations in addition to those in the AASHTOs Manual for Bridge Evaluation
(AASHTO 2008). Section 7 provides an example of a report for a live load test that was
conducted on Bradford Bridge #3430 (Poulin 2012).
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