and Analytical Optimization of Fiber Reinforced Polymer (FRP)
Grid-Reinforced Concrete Bridge Decking
Prof. Lawrence Bank,
Prof. Michael Oliva
& Prof. Jeff Russell
Dept of Civil & Environmental
purpose of this research is to investigate the optimization
of three-dimensional fiber-reinforced polymer (FRP) reinforcing
grids and integrated stay-in-place (SIP) formwork for reinforcing
and forming highway bridge decks. The use of FRP as a reinforcing
material in concrete has the benefits of modular construction
of the reinforcing system and corrosion resistance. The modular
nature of the system creates the potential for shortened construction
time for replacement of a bridge deck structure. Resistance
to corrosion gives the deck structure a longer service life
than conventional steel decks. Previous research has implemented
two different FRP reinforcing systems in bridges on Highway
151 in Wisconsin.
research is a continuation of the previous research, developing
a more efficient and cost effective three-dimensional FRP grid
and SIP system. The integration of stay-in-place formwork will
greatly reduce the amount of formwork required to be installed
in the field, subsequently reducing the construction time of
a deck replacement project. Additionally, a design basis for
determining the amount of FRP reinforcing will be developed.
The research includes full-scale test of FRP SIP grid panels
in the Wisconsin Structures and Materials Laboratory.
different grid constructions will be fabricated and tested.
Both specimens include a stay-in-place forming system. Testing
of the specimens involves applying a simulated design vehicle
wheel load onto the specimens. Loading of the specimens in the
elastic range will allow the width of deck that the wheel load
is distributed over to be determined. Inelastic loading of the
panels will allow the ultimate capacity of the system, as well
as the mode of failure of the system to be determined. With
the ultimate capacity of the system known, the factor of safety
of the system can then be ascertained. Comparisons to the previous
research by Dieter, 2002, and Jacobson, 2004, will be made to
evaluate the performance of these two grid constructions. The
research is funded by the FHWA Innovative Bridge Research and
Construction (IBRC) Program.