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Performance of Skew Reinforcing in Inverted-T Bridge Caps of Donigan Road Bridge, Katy, Texas
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2023-08-01
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Edition:Final Report September 2021– August 2023
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Abstract:Reinforced concrete inverted-T bridge caps (ITBCs) have been widely used in Texas and the United States bridges. They are aesthetically pleasing, offer a practical means to increase vertical clearance, and have practical applications to address landscaping requirements. The ITBCs in Texas are designed using the traditional empirical procedures outlined in the TxDOT Bridge Design Manual (TxDOT BDM) LRFD that conform to the AASHTO (American Association of State Highway and Transportation Officials) LRFD (2014) Bridge Design Specifications. The traditional method of flaring the transverse reinforcement out in skew ITBCs brings insignificant design and construction complexity. In addition, the detailing of the transverse reinforcement has a profound influence on the overall shear capacity of the bent cap as well as the performance of the support ledge. Therefore, improper detailing can cause poor placement of concrete and cracks within the concrete structure, reducing the load-carrying capacity and increasing future maintenance costs.
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[PDF-31.18 MB]
