CE672

Advanced Prestressed Concrete Design

Texts:

Required:

None--The course material will consist of class notes and references from technical journals and several other sources.

Additional References:

Design of Prestressed Concrete Structures by Lin & Burns.
PCI Design Handbook, Prestressed Concrete Institute, Precast and Prestressed Concrete, 4th Ed.
Post-Tensioning Manual (4th Ed.) Post-Tensioning Institute, 1987.
Prestressed Concrete Structures by Collins/Mitchell, Prentice Hall.
ACI 318-95 and 318-95R, "Building Code Requirements for Structural Concrete," American Concrete Institute.
Design of Prestressed Concrete by Arthur H. Nilson, Second Edition, Wiley & Sons.

Grading:

During the Semester your grade will be computed from the following work:

Midterm Exams (2 at 25% each)	50%
Homework	25%
Final Exam	25%
Total	100%

Course Description:

This course will cover advanced understanding of the behavior of prestressed concrete and primarily the design of post-tensioned bridge structures:

Prestressing as just another load on the structures ("Equivalent Load Concept").
Development of estimates for loss of prestress.
Design of cast-in-place post-tensioned girder/slab bridges and precast post-tensioned bridges.

Course Topics:

Introduction: Throughout the course we will consider the materials and techniques used in pretensioned and post-tensioned construction of prestressed concrete bridge members. Actual material properties are used in problems throughout the course and practical construction problems are considered. Equivalent load concept for design of prestressed concrete structures will be used. Hardware used in bridge post-tensioning applications will be presented. Indeterminate structures and restraint actions in prestressed concrete structures will be addressed.

Discuss loss of prestress due to various sources for pretensioned and post-tensioned bridge members. Use of time-step method for calculation of losses and the AASHTO method will be covered.
Flexural strength of members with bonded and unbonded tendons. Use of AASHTO Bridge Specifications to determine Mu.
Shear strength with emphasis on the new AASHTO LRFD Specifications. B-regions are designed with the modified compression field theory and D-regions are designed using Strut-Tie models.
Design of continuous slab/girder bridge. Including AASHTO Bridge loadings.
Precast post-tensioned bridge construction. Applications, design and analysis considerations.