Highway Bridge Superstructure Engineering LRFD Approaches to Design and Analysis
and analysis of highway bridge superstructures conforming to AASHTO-LRFD Specifications for
Design of Highway Bridges. The discussion presented herein focuses on the load and resistance
design philosophy conforming to AASHTO LRFD Bridge Design Specifications. A fairly detailed
account of the historical development and design of highway bridges conforming to AASHTO
Standard Specifications for Highway Bridges, now archived, can be found in the author’s 1998
book, Design of Modern Highway Bridges (McGraw-Hill, 1998); that topic is not discussed herein.
This book has been designed to serve both as a stand-alone text for a first course in design of
highway bridge superstructures and a handy reference for educators and practicing engineers. This
is essentially a how to do book and has code-connected design focus. A fair amount of undergradu-
ate-level knowledge of structural loads and analyses and exposure to first courses in design of steel
and concrete structures are essential for a quick grasp of the material presented herein. Because of
the simplicity in style and format, this book can be used as a tool for teaching highway bridge design
courses for both undergraduate- and graduate-level classes.
An important reason for the simple formatting of the book is to fill the need of the times. In
many civil engineering curricula, highway bridge design course is offered to a class that comprises
both graduate- and senior-level students (the author has taught such classes); the latter quite often
possess neither the same level of prerequisite knowledge nor the depth of engineering maturity as
the former. As such, the format and style of this book, along with many fully solved examples, have
been designed to fill that need. Both students as well as design engineers will find this book as an
excellent learning resource and a practical guide for engineering practice.
Presented in this book is a detailed discussion, with design examples, of concrete (both rein-
forced and prestressed) and steel bridge superstructures commonly used for bridges in the short
span range. Wood superstructures are not covered in this book as they are built rather infrequently
and have limited practical applications.
many civil engineering curricula, highway bridge design course is offered to a class that comprises
both graduate- and senior-level students (the author has taught such classes); the latter quite often
possess neither the same level of prerequisite knowledge nor the depth of engineering maturity as
the former. As such, the format and style of this book, along with many fully solved examples, have
been designed to fill that need. Both students as well as design engineers will find this book as an
excellent learning resource and a practical guide for engineering practice.
Presented in this book is a detailed discussion, with design examples, of concrete (both rein-
forced and prestressed) and steel bridge superstructures commonly used for bridges in the short
span range. Wood superstructures are not covered in this book as they are built rather infrequently
and have limited practical applications.
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