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The structural system of prestressed concrete (PC) voided slab deck is intermediate between plate and girder. Therefore, the conventional design method is based on the assumption that the system is similar to the plate system or to the grid system.In this paper, the structural behavior of a continuous PC voided slab deck with three spans was analyzed by using the three dimensional solid finite element method (FEM). The analytical results were compared with those obtained from the conventional beam, plate and grid theories. In addition, the effect of parameters on the stress at the intermediate support was discussed; and the suitability of negative bending moment reduction at the intermediate support described in the specification for continuous roadway bridges was investigated.

Structural Analysis of a Three Span Continuous PC Voided Slab Deck by Three Dimensional Finite Element Method.