Cast-in-Place Concrete Connections for Precast Deck Systems (2011) / Chapter Skim
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Pages 240-246
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241 Chapter 8 Flange/Deck Connection: Concept Development of Joint Details for Accelerated Bridge Construction 8.0 Introduction Speed of construction, particularly for bridge replacement and repair projects, has become a critical issue to minimize disruption of traffic and commerce. Promising systems for rapid construction include precast bridge systems fabricated using decked bulb-T (DBT)
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242 elements in bridge systems including research on the use of precast elements such as deck panels for rapid deck replacement. There are both longitudinal joints and transverse joints in prefabricated bridge systems.
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243 limiting wider use of this type of bridge. The State of Washington limited the use of DBTs for roads with high ADT and for continuous bridges.
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244 8.1.1. Summary of Phone Survey in Association with Longitudinal and Transverse Connection Concepts between Precast Panels and Bulb-T Flanges Survey respondents provided feedback and insight on the longitudinal and transverse connection concepts in general, as well as regarding the five specific joint connection details outlined in a handout that was distributed prior to the phone survey conducted by the research team (see Appendix C)
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245 8.1.2. Criteria Considered and Finalization of Longitudinal and Transverse Connection Concepts Investigated in NCHRP 10-71 In further developing the connection concepts, the following criteria were considered: • The connection detail should not only be able to transfer shear but also provide moment continuity across the joint.
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246 the field. The stagger cannot be too large, or the transfer of forces across the joint would be difficult to achieve.
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247 Figure 8.1.1: Orientation of joints and corresponding test specimens 8.2. Organization of Report Regarding Investigation of Longitudinal and Transverse Connection Concepts between Precast Panels and Bulb-T Flanges Chapter 9 describes the process of selection of trial longitudinal and transverse joint systems and the laboratory testing of trial selected joints.
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