Shear Capacity of In Service Prestressed Concrete Bridge Girders

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Shear Capacity of In Service Prestressed Concrete Bridge Girders

Author: Barr, Paul J | Size: 13.16 MB | Format: PDF | Quality: Original preprint | Publisher: Utah State University, Logan | Year: 2010 | pages: 226

The design of prestressed concrete bridge girders has changed significantly over the past several decades. Specifically, the design procedure to calculate the shear capacity of bridge girders that was used forty years ago is very different than those procedures that are recommended in the current AASHTO LRFD Specifications. As a result, many bridge girders that were built forty years ago do not meet current design standards, and in some cases warrant replacement due to insufficient calculated shear capacity. However, despite this insufficient calculated capacity, these bridge girders have been found to function adequately in service with minimal signs of distress. The objective of this research was to investigate the actual in service capacity of prestressed concrete girders that have been in service over an extended period of time. The actual capacity was compared with calculated values using the AASHTO LRFD Specifications.

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