This example is part of a series of design examples sponsored by the
Federal Highway Administration. The design specifications used in these
examples is the AASHTO LRFD Bridge design Specifications. The intent of
these examples is to assist bridge designers in interpreting the
specifications, limit differences in interpretation between designers,
and to guide the designers through the specifications to allow easier
navigation through different provisions. For this example, the Second
Edition of the AASHTO-LRFD Specifications with Interims up to and
including the 2002 Interim is used.
This design example is intended to provide guidance on the
application of the AASHTO-LRFD Bridge Design Specifications when applied
to prestressed concrete superstructure bridges supported on
intermediate multicolumn bents and integral end abutments. The example
and commentary are intended for use by designers who have knowledge of
the requirements of AASHTO Standard Specifications for Highway Bridges
or the AASHTO-LRFD Bridge Design Specifications and have designed at
least one prestressed concrete girder bridge, including the bridge
substructure. Designers who have not designed prestressed concrete
bridges, but have used either AASHTO Specification to design other types
of bridges may be able to follow the design example, however, they will
first need to familiarize themselves with the basic concepts of
prestressed concrete design.
This design example was not intended to follow the design and
detailing practices of any particular agency. Rather, it is intended to
follow common practices widely used and to adhere to the requirements of
the specifications. It is expected that some users may find differences
between the procedures used in the design compared to the procedures
followed in the jurisdiction they practice in due to Agency-specific
requirements that may deviate from the requirements of the
specifications. This difference should not create the assumption that
one procedure is superior to the other.
Reference is made to AASHTO-LRFD specifications article numbers
throughout the design example. To distinguish between references to
articles of the AASHTO-LRFD specifications and references to sections of
the design example, the references to specification articles are
preceded by the letter S. For example, S5.2 refers to Article 5.2 of
AASHTO-LRFD specifications while 5.2 refers to Section 5.2 of the design
example.
Two different forms of fonts are used throughout the example. Regular
font is used for calculations and for text directly related to the
example. Italic font is used for text that represents commentary that is
general in nature and is used to explain the intent of some
specifications provisions, explain a different available method that is
not used by the example, provide an overview of general acceptable
practices and/or present difference in application between different
jurisdictions.
Download
Code
Comprehensive Design Example for Presressed Concrete (PSC) Girder Superstructure Bridge with Commentary
http://www.mediafire.com/download/nww1agnnein/prestressedsuperstructureconcrete.rar
