Adjustable haunch forms for precast concrete bridge deck systems

摘要

>Precast concrete bridge decks have not been widely adopted for a number of reasons. One significant reason is that these systems require manual forming to complete the construction of the area between the girders and the deck or haunch after field adjustment. An adjustable forming system is presented that uses commonly available packing foams and adhesives. Several novel test methods were developed to investigate the performance of these systems from different precast concrete bridge deck construction processes. A recommendation is made for materials to be used, and a typical construction sequence is presented.>References>1. Tadros, M.K., and Baishya, M.C. 1997. Rapid Replacement of Bridge Decks. Final report 12-14. National Cooperative Highway Research Program.  Washington, DC: National Academy Press.>2. Breger, R. H. 1983. Full-Depth Modular Precast Prestressed Bridge Decks. In Bridges and Culverts, pp. 52-59. Transportation Research Record 903. Washington DC: Transportation Research Board.  >3. Ralls, M. L., M. D. Hyzak, R. D. Medlock, and L. M. Wolf. 2004. Prefabricated Bridges - Current U.S. Practice and Issues. Second PREFAB Workshop, Sept. 2004. CD-ROM. >4. Badie, S. S., M. K. Tadros. 2008. Full-Depth Precast- Concrete Bridge Deck Panel Systems. Final report 584. National Cooperative Highway Research Program. Washington DC: National Academy  Press. >5. Sullivan, S. 2007. a€?Construction and Behavior of Precast Bridge Deck Panel Systems.a€? PhD diss., Virginia Polytechnic Institute and State University, Blacksburg, VA. >6. Oliva, M. G., L. C. Bank, and J. S. Russell. 2007. Full Depth Precast Concrete Highway Bridge Decks. Innovative  Bridge Research and Construction final report 0607-48-01. Madison, WI: University  of Wisconsin.>7. Ley, T., R. Browne, J. Abrams, R. Gonzalez, L. Bussell, M. Padron, and F. Valles. 2010. The Development and Implementation of a Precast Bridge Deck Overhang System. In 3rd International FIB  Conference, Washington D.C., June 2010. CD-ROM.