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Continuous Prestressed Concrete Girder Bridges Volume 1: Literature Review and Preliminary Designs

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Continuous Prestressed Concrete Girder Bridges Volume 1: Literature Review and Preliminary Designs Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. FHWA/TX-12/0-6651-1 4. Title and Subtitle 5. Report Date CONTINUOUS PRESTRESSED CONCRETE GIRDER BRIDGES October 2011 VOLUME 1: LITERATURE REVIEW AND PRELIMINARY DESIGNS Published: June 2012 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Mary Beth D. Hueste, John B. Mander, and Anagha S. Parkar Report 0-6651-1 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Texas Transportation Institute The Texas A&M University System 11. Contract or Grant No. College Station, Texas 77843-3135 Project 0-6651 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Texas Department of Transportation Technical Report: Research and Technology Implementation Office September 2010–September 2011 P.O. Box 5080 14. Sponsoring Agency Code Austin, Texas 78763-5080 15. Supplementary Notes Project performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration. Project Title: Continuous Prestressed Concrete Girder Bridges URL: http://tti.tamu.edu/documents/0-6651-1.pdf 16. Abstract The Texas Department of Transportation (TxDOT) is currently designing typical highway bridge structures as simply supported using standard precast, pretensioned girders. TxDOT is interested in developing additional economical design alternatives for longer span bridges, through the use of the continuous precast, pretensioned concrete bridge structures that use spliced girder technology. The objectives of this portion of the study are to evaluate the current state-of-the-art and practice relevant to continuous precast concrete girder bridges and recommend suitable continuity connections for use with typical Texas bridge girders. A wide variety of design and construction approaches are possible when making these precast concrete bridges continuous with longer spans. Continuity connection details used for precast, prestressed concrete girder bridges across the United States were investigated. Several methods were reviewed that have been used in the past to provide continuity and increase the span length of slab-on-girder prestressed concrete bridges. Construction issues that should be considered during the concept development and design stage are highlighted. Splice connections are categorized into distinct types. Advantages and disadvantages of each approach are discussed with a focus on construction and long-term serviceability. A preliminary design study was conducted to explore potential span lengths for continuous bridges using the current TxDOT precast girder sections, standard girder spacings and material properties. The revised provisions for spliced precast girders in the AASHTO LRFD Bridge Design Specifications (2010) were used in the study. The results obtained from the literature review and preliminary designs, along with precaster and contractor input, are summarized in this report. 17. Key Words 18. Distribution Statement Precast Prestressed Concrete, Spliced Girder Technology, No restrictions. This document is available to the public Bridge Girders, Splice Connections through NTIS: National Technical Information Service Alexandria, Virginia 22312 http://www.ntis.gov 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 22. Price Unclassified Unclassified 176 Form DOT F 1700.7 (8-72) Reproduction of completed page authorized CONTINUOUS PRESTRESSED CONCRETE GIRDER BRIDGES VOLUME 1: LITERATURE REVIEW AND PRELIMINARY DESIGNS by Mary Beth D. Hueste, Ph.D., P.E. Associate Research Engineer Texas Transportation Institute John B. Mander, Ph.D. Research Engineer Texas Transportation Institute and Anagha S. Parkar Graduate Research Assistant Texas Transportation Institute Report 0-6651-1 Project 0-6651 Project Title: Continuous Prestressed Concrete Girder Bridges Performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration October 2011 Published: June 2012 TEXAS TRANSPORTATION INSTITUTE The Texas A&M University System College Station, Texas 77843-3135 DISCLAIMER This research was performed in cooperation with the Texas Department of Transportation (TxDOT) and the Federal Highway Administration (FHWA). The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official view or policies of the FHWA or TxDOT. This report does not constitute a standard, specification, or regulation. It is not intended for construction, bidding, or permits purposes. The engineer in charge was Mary Beth D. Hueste, Ph.D., P.E. (TX 89660). v ACKNOWLEDGMENTS This research was conducted at Texas A&M University (TAMU) and was supported by TxDOT and FHWA through the Texas Transportation Institute (TTI) as part of Project 0-6651, “Continuous Prestressed Concrete Girder Bridges.” The authors are grateful to the individuals who were involved with this project and provided invaluable assistance, including Dacio Marin (TxDOT, Research Project Director) and the TxDOT Project Monitoring Committee: Shane Cunningham, John Holt, Mike Hyzak, Kevin Pruski, Duncan Stewart, and Tom Stout. vi TABLE OF CONTENTS Page List of Figures ................................................................................................................................ x List of Tables ............................................................................................................................... xii 1. INTRODUCTION..................................................................................................................... 1 1.1 Background ................................................................................................................... 1 1.2 Significance................................................................................................................... 2 1.3 Objectives and Scope .................................................................................................... 3 1.4 Research Plan ................................................................................................................ 3 1.4.1 Review Literature and State-of-the-Practice ................................................................. 4 1.4.2 Preliminary Designs ...................................................................................................... 4 1.4.3 Focus Group Meetings .................................................................................................. 5 1.4.4 Prepare Phase 1 Research Report ................................................................................. 6 1.5 Outline........................................................................................................................... 6 2. LITERATURE REVIEW ........................................................................................................ 7 2.1 Background ................................................................................................................... 7 2.2 On-Pier Splicing with Continuity Diaphragm .............................................................. 8 2.2.1 Non-Prestressed Design Options .................................................................................. 8 2.2.2 Prestressed Design Options......................................................................................... 15 2.3 In-Span Splicing with Continuity Diaphragm ............................................................ 24 2.3.1 Partial Length Post-Tensioning................................................................................... 24 2.3.2 Full Length Post-Tensioning....................................................................................... 25 2.4 Materials and Section Properties ................................................................................ 35 2.5 Issues in Adopting Spliced Girder Technology .......................................................... 35 2.6 Research Needs ........................................................................................................... 36 3. PRELIMINARY DESIGN OUTLINE .................................................................................. 39 3.1 Objective ..................................................................................................................... 39 3.2 Bridge Geometry and Girder Section ......................................................................... 39 3.3 Design Parameters ...................................................................................................... 43 3.4 Design Assumptions ................................................................................................... 44 3.5 Detailed Design Examples .......................................................................................... 46 3.6 Design Proposal for Preliminary Study ...................................................................... 47 3.7 Limit States and Load Combinations .......................................................................... 48 3.8 Allowable Stress Limits .............................................................................................. 49 3.9 Loads ........................................................................................................................... 50 3.10 Design Philosophy Adapted .......................................................................................
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