Parametric Study of Full Precast Concrete Deck Slabs Using Nonlinear Finite Element Analysis

When bridges need rehabilitation, they can be totally replaced, or they can be repaired using cast in place concrete or precast concrete. This researcher used ANSYS® Mechanical Pro APDL Release 18.2 to perform a nonlinear finite element analysis (FEA) of full depth precast concrete bridge deck slabs. Using precast concrete reduces the time traffic flow is disrupted and provides a durable deck. Steel bolts placed in shear pockets connect the precast concrete with the steel beam, resulting in a full composite action. It is of particular knowledge in this kind of connection to obtain efficiency in the placement of shear stud in pockets, either spaced 4 feet (1219 mm) or as the design requires. This parametric study examined the effects of pocket spacing and the number of shear studs per pocket. The results indicated the horizontal shear strength increased in relation to the number of pockets in simply support and continuous span models. The load deflection curve and slippage value has been recorded and compared with the experimental test by using a nonlinear finite element analysis (FEA). In addition, this study developed the optimal design solution and examined the placement of post-tensioned along the span, looking for the optimal locations for various lengths of spans. The analysis sought to find the minimum cost for construction as well as compromise solutions for selected single objective functions. Studies provided a better understanding of the issues and parameters in this bridge design type and the use of the design program, DCALC, can be useful to expedite the design potentially resulting.