Abstract
An analytical study was carried out to determine whether and how much the performance of continuity connections for precast, prestressed concrete girders with cast in place decks is affected by positive moment reinforcement in continuity diaphragms. A flexibility based analytical tool is developed that predicts time dependent restraint moments and the effectiveness of the continuity connection under service live loads. The model considers the different nonlinear stress-strain responses of the continuity diaphragm and the girder/deck composite sections, and the change in the stiffness of the structure under time-dependent effects. The study confirms previous findings that total midspan moments are virtually independent of the amount of positive moment reinforcement provided.
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