Grouted transverse full-depth precast bridge deck joint integrity

Many states are implementing Accelerated Bridge Construction (ABC) methods to reduce traffic delays due to bridge construction. One such method is the use of precast concrete full-depth panels to construct bridge decks. The grouted transverse joint between precast concrete deck panels is the most vulnerable element of the bridge deck system. To extend the longevity of bridge decks it is imperative to improve the integrity of the grouted transverse joint. The focus of this research is to compare different methods to protect, strengthen, and analyze the capacity of the grouted transverse joint. This is done through four separate papers focusing on: the protection of the joint using different overlay systems; the capacity and behavior of the transverse joint using Fiber Reinforced-Polymers (FRP) composite rods at different posttensioning levels; finite element modeling of the transverse joint under concentrated truck tire loads; and an analytical approach, comparing the applied concentrated truck tire load with the capacity of the joint. Minimal research has been done on the capacity of the joint under concentrated loads, which are the majority of the loads applied to bridge decks. No previous research has been provided using Carbon FRP rods for posttensioning of the transverse bridge deck joint. Several observations, conclusions and recommendations were found with this research. It was found that overlay systems reduce the chloride intrusion for the transverse joint between full depth precast bridge deck panels. Posttensioning across the iv transverse joint provided increased joint shear transfer capacity and will impede deck cracking, and therefore lead to longer useful life of the bridge deck. The use of carbon FRP rods for posttensioning is beneficial in improving the integrity of the joint. Prior to the initial joint cracking the deck behaved monolithically which leads to the simpler design methods for the design and distribution methods of concentrated loads acting on the deck. The proposed effective distribution width of 36 in. was acceptable in the design of the transverse joint precast bridge decks under concentrated loads.