Development of precast bridge deck overhang system

Scope and Method of Study. Almost 24% of the bridges nationwide are structurally deficient or functionally obsolete, this situation demands for new and innovative method for bridge repair and construction that are able to provide cost-effective, long-lasting and rapid construction systems. Precast bridge deck overhang system has shown potential to provide a very effective construction technique which can be implemented for the rehabilitation of existing bridges as well as new bridge construction. For this reason, full-scale testing of precast bridge deck overhang system was done to evaluate the performance for service and strength limit states as per AASHTO LRFD 2007. Testing of adjustable haunch form was also conducted during this research study.Findings and Conclusions. The experimental results clearly infers that proposed system shows satisfactory performance for service and strength limits as per AASHTO LRFD 2007 with improved performance over conventionally used CIP bridge deck overhang system. Recommendations for use of adjustable haunch form system are made on the basis the test data.