Bridge Engineering Handbook, Second Edition (2024)

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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.

Abstract—This Steel Technical Information and Product Services (Steel TIPS) report providesinformation and technologies that can be used to design as well as to evaluate gusset plates in steel trussbridges. The first chapter of this report is devoted to an introduction to the steel truss bridges and gussetplates and their types as well as to the objectives and scope of this document. The second chapterprovides a historical background on gusset plates used in steel truss bridges. Chapter 3 presents abackground on development of equations and concepts used in design of gusset plates and providesprocedures and specifications for design of gusset plates used in steel trusses of bridges. The lastchapter, Chapter 4, provides notes on evaluation of gusset plates in existing bridges. The report has anappendix on J. A. L Waddell’s First Principles of Designing.

Construction and Design of Prestressed Concrete Segmental Bridges A Wiley-Interscience Publication

On-line, continuous monitoring technologies of a rigorous and objective nature are sought to quantitatively identify and evaluate the condition or health of highway structures over their useful lifetime. A global bridge evaluation methodology is under development based upon the structural identification concept, employing modal testing, truckload testing, and instrumented monitoring as its principal experimental tools. Test results are transformed to

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