Parametric study for structural performance of spliced hybrid deck beams with UHPC cast in place joints

Abstract

Splice beams are considered a solution for some difficults in bridge construction and a method for repairing damaged beams. One of the most challenging aspects of this technique is avoiding bond failure between the spliced members. In this study, ultra-high performance concrete (UHPC) was used to splice three beam segments due to its superior performance. This paper investigate the effects of some parameters on the spliced beams by Finite Element Method using computer program ABAQUS. The study have two approaches, first one, a validation study to generate model agree with experimental test results of seven specimens were tested under three bending point load. The main variables being the depth of the joint, the presence of a shear key in the joint, the hybridization of reinforcement, and the addition of dowels in the joint. The model was simulated and achieved good convergence when compared with experimental results, considering the load-deflection response and failure mode. The second approach that investigated various parametric studies, such as reverse cyclic load, repeated cyclic load, thickness of the deck, type of interface joint, reinforcement ratio, strengthening by UHPC layer, and the loading pattern.