There is a critical need to develop more cost-effective and reliable design and construction procedures for the joint load-transfer systems for full-depth repairs of portland cement concrete pavements. A study conducted at the university of illinois and funded by the fhwa was directed at the development of such a design procedure. This research work featured a laboratory study of the performance of dowel bars anchored in concrete slabs. This study produced models thatpredict the development of dowel bar looseness as a function of design and loading parameters. The research work also included a study of the long-term faulting and loss of load transfer across full-depth repair joints in experimental field installations in central illinois. This study resulted in the development of a faulting model based on loss of load-transfer efficiency. These models were linked using a third model (relating dowel looseness and load-transfer efficiency) developed from data collected by other researchers conducting related studies. The three models were combined into a graphical procedure for easy use. Adjustments to the models for varying design reliability and site-specific field conditions are also discussed. This paper appears in transportation research record no. 1272, Pavement management and rehabilitation 1990.
Samenvatting