United States Department of Transportation
i
The development of crashworthy rails for fiber reinforced polymer honeycomb bridge deck system.
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2015-07-01
[PDF-1.84 MB]
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Abstract:Fiber reinforced polymer (FRP) honeycomb panels offer an efficient and rapid replacement to
concrete decks. The system consists of FRP honeycomb sandwich panels with adequate guardrails. Although
FRP bridge deck panels have already been designed and used over the past several years on a number of
through truss bridges, they could not be used on steel girder bridges until approved crashworthy bridge
railing attachments could be validated. Two systems have been successfully crash tested, one with steel thrie
beams/guardrails on steel posts and the other with concrete barriers. Both systems are now ready for use on
temporary/detour bridges, or as permanent deck replacement allowing higher live load while keeping the
existing steel girders and substructure.
The light weight of FRP honeycomb panels (about 75% lighter than concrete) allows heavier truck
loads, while keeping the existing girders and substructure without compromising the safety of the public. The
roadway can be made wider by increasing the overhangs, thus allowing for wider farm equipment on narrow
bridges in rural areas. The replacement of the concrete deck using this system may be completed in a matter
of a few days, or even hours, as opposed to several months when using the conventional methods.
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