Partial depth precast concrete deck panels on curved bridges : finite element analytical model of PCPs.
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2017-03-01
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Abstract:A number of full-scale tests have been carried out in the laboratory focused on the shear
performance of simulated precast concrete deck panels (PCP). Shear tests were carried out to
simulate the type of loading that will be applied to the deck panels as they are engaged as a
bracing element. As part of the research study, two different finite element models were
developed to improve the understanding of the behavior of the concrete deck panels as well as
the members that are to be braced by the deck panels. The two models consist of a detailed
model as well as a simple model. The purpose of the detailed model is for studying the impact of
details on local stress concentrations in the panels so as to understand the potential for cracking
or crushing of the concrete in isolated regions. The purpose of the simple model is to represent
the stiffness and strength of the concrete deck panel for parametric studies are larger
girder/bridge systems. Both of these finite element analytical models represent the most recent
PCP/connection system tested in the shear frame and were developed using the commercial
software program Abaqus/CAE 6.13-1. This detailed model was constructed to gain insight in
the behavior of the PCP/connection system under the loads applied in the shear frame test to help
refine the connection system if necessary. The simple model consists of a simple truss system
that represents the PCP/connection system. This simple model will be useful for describing the
PCP/connection system in the parametric finite element modeling of steel I-beam, steel tub
girder, and straight and horizontally curved precast concrete box girder systems. Furthermore,
the truss model will be used to represent PCP/connection systems in UT Bridge. UT Bridge is a
software program that was developed as part of TxDOT research project 0-5574 and allows
engineers to quickly developed analytical models of curved steel girder systems during
construction. The program is currently at version 1.6; however, a major upgrade is in the works
for the program that will be released at version 2.0. The simple model that is being developed as
part of this project will be utilized in the program, which will provide an easy means for
engineers to account for the contribution of the deck panels during the analysis of the erection or
deck construction stages.
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