As a supplement to the Structures Detailing Manual (SDM), a series of examples has been compiled here which represent some of the many situations a designer may encounter when designing and detailing structures. These Structures Detailing Manual Examples are provided in PDF documents that are structured to illustrate the content that is expected to be seen on each sheet at each level of completion based on the requirements set forth in the FDOT Design Manual (FDM),Sections 121. Each PDF opens showing the level of completion that is expected for the sheet the first time it is submitted. Bookmarks are provided in the left panel which allow the user to click on the desired submittal phase to see the appropriate level of completion for the sheet. The information presented in these examples is meant to convey detailing and organizational requirements and not to present actual design examples. (No files exceed 1MB)
Concrete Box Girder Bridge Design Example Pdf Download
Attached is a model file and a PDF which outlines the procedure for modeling a concrete box-girder bridge, a steel-girder bridge, and a cable-stayed bridge. An image of a model taken from the SAP2000 Bridge Examples document is shown in Figure 1:
This free eBook provides context and instructions for the use of the 2015 revised version of the Microsoft Excel workbook to compute pile stresses, plot interaction diagrams, and compute lifting points of precast concrete piles. There is no cost for downloading this publication. However, registration is required so that users can be contacted when updates or revisions to the... Details Practice of Precast Prestressed Adjacent Box Beam FREE PDF The State of the Practice of Precast Prestressed Adjacent Box Beam Bridges (SOP-01-2012), 1st Edition Free PDF This report has been prepared and reviewed as aPrecast/Prestressed ConcreteInstitute (PCI)Committee effort to present the state of thepracticefor design andconstruction ofprecast/prestressed adjacentbox beambridges. Thisreport is intendedfor reference by professional personnel who are competentto evaluate the significance... Details CB01H - Curved Precast Concrete Bridges Curved Precast Concrete Bridges State-of-the-Art Report, 2012, 1st Edition, (CB-01-12)
Addresses how to build curved structures with corded & curved precast prestressed concrete girders.This item ships from... Details IB01H - Precast/Prestressed Integral Bridges The State of the Art of Precast/Prestressed Integral Bridges, 20011st Edition (IB-01)
The Bridge Design Practice Manual provides bridge design engineers with basic design concepts, assumptions, and step-by-step design examples. It also introduces innovative design practices of Caltrans.
Keywords: Design. Recommendations. Load and resistance factor design (LRFD). Seismic design. Bridges. Highways. Multispan continuous bridges. Cast-in-place concrete girders. Bearings. Elastomeric bearings. Two column bents. AASHTO Division 1-A Standard Specifications for Highway Bridges.
Abstract: Another contribution to the ATC-MCEER series, Recommended LRFD Guidelines for the Seismic Design of Highway Bridges, this volume contains two design examples: the eighth and ninth design examples in a series originally developed for FHWA to illustrate the use of the AASHTO Division 1-A Standard Specifications for Highway Bridges. More specifically, the eighth design example was performed on a five-span continuous cast-in-place concrete box girder bridge and the ninth design example was performed on a three-span continuous steel girder bridge. These examples emphasize different features that must be considered in seismic analysis and design process. Sections include Design Example 8, Design Example 2LRFD, SDAP A2 Conventional Bearing Example, and SDAP A2 with Elastomeric Bearing Example, in addition to various figures, tables, references, project participants and an Appendix.
Chapter 5 - Concrete Structures (PDF 18MB) provides design guidance for reinforced and prestressed concrete including cast-in-place and precast elements. Concrete elements discussed include bridge decks, pier caps, reinforced concrete box girders, post-tensioned box girders, pretensioned girders and spliced girders.
A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The box is typically rectangular or trapezoidal in cross-section. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Although the box girder bridge is normally a form of beam bridge, box girders may also be used on cable-stayed and other bridges.
In 1919, Major Gifford Martel was appointed head of the Experimental Bridging Establishment at Christchurch, Hampshire,[1] which researched the possibilities of using tanks for battlefield engineering purposes such as bridge-laying and mine-clearing. Here he continued trials on modified Mark V tanks. The bridging component involved an assault bridge, designed by Major Charles Inglis RE, the Canal Lock Bridge, which had sufficient length to span a canal lock. Major Martel mated the bridge with the tank and used hydraulic power generated by the tank's engine to manoeuvre the bridge into place. For mine clearance the tanks were equipped with 2-ton rollers.
Martel also developed his new bridging concept at the EBE, the Martel bridge, a modular box girder bridge suitable for military applications. The Martel bridge was adopted by the British Army in 1925 as the Large Box Girder Bridge.[2] A scaled down version of this design, the Small Box Girder Bridge, was also formally adopted by the Army in 1932. This latter design was copied by many countries, including Germany, who called their version the Kastenträger-Gerät (K-Gerät for short).[2] The United States was another country whose army created their own copy, designating it the H-20. In addition, the modular construction of the basic Martel bridge would later during WWII become part of the basis of the Bailey bridge. In 1954, the Royal Commission on Awards to Inventors awarded Martel 500 for infringement on the design of his bridge by the designer of the Bailey bridge, Donald Bailey.[3]
The (non-modular) box girder bridge was a popular choice during the roadbuilding expansion of the 1960s, especially in the West, and many new bridge projects were in progress simultaneously. A serious blow to this use was a sequence of three serious disasters, when new bridges collapsed in 1970 (West Gate Bridge and Cleddau Bridge) and 1971 (South Bridge (Koblenz)). Fifty-one people were killed in these failures, leading in the UK to the formation of the Merrison Committee[4] and considerable investment in new research into steel box girder behaviour.
Most of the bridges still under construction at this time were delayed for investigation of the basic design principle. Some were abandoned and rebuilt as a different form of bridge altogether. Most of those that remained as box girder bridges, such as Erskine Bridge (illus.), were either redesigned, or had additional stiffening added later. Some bridges were strengthened a few years after opening and then further strengthened years later, although this was often due to increased traffic load as much as better design standards. The Irwell Valley bridge of 1970 was strengthened in 1970 and again in 2000.[5]
If made of concrete, box girder bridges may be cast in place using falsework supports, removed after completion, or in sections if a segmental bridge. Box girders may also be prefabricated in a fabrication yard, then transported and emplaced using cranes.
For steel box girders, the girders are normally fabricated off site and lifted into place by crane, with sections connected by bolting or welding. If a composite concrete bridge deck is used, it is often cast in-place using temporary falsework supported by the steel girder.
Purpose of the TrainingThe purpose of this training is to go over details that are necessary for post-tension box girder bridge applications. The existing tutorial manuals and webinars may cover the same features that will be discussed in this training. However, more details about (1) why and how each input are defined and (2) inter-relationships of the concrete time dependency, construction stage analysis and Prestressing are discussed in depth.
See the BGS Support Information document, linked in the same manner as the BGS User Guide, for instructions on how to report bugs and wishes about program functionality or get technical support. Technical support is available to all TxDOT BGS users and any consultant BGS users designing bridges for TxDOT.IMPORTANT NOTE: This 2/20/2020 release of BGS, Version 9.1.6 is a technical release intended to address Windows 10 compatibility and the false positives for malware by malware scanning software issues. The false positive for malware issue has persisted since shortly after the 02/12/2016 posting of BGS 9.1.6, as malware detection software began becoming increasingly more sensitive. The repackaging of the installer includes revised names and content for some documentation. The functionality of the compiled elements of the BGS software have not changed, hence the compile program version remains 9.1.6.
This TxDOT-customized version of PGSuper is versatile, user friendly, Windows-based software for the design, analysis, and load rating of multi-span precast-prestressed concrete bridge beams/girders in accordance with the AASHTO LRFD Bridge Design Specifications (thru the 9th Edition, 2020) and by TxDOT design policies and guidelines. Properties of TxDOT standard I-girders (TxGirders), U beams, slab beams, decked slab beams, box beams, and X-beams and TxDOT specific design criteria are included in templates and libraries published by TxDOT on a server accessible via the Internet. Thus, the software is capable of periodically updating the installed templates and libraries with the most current versions published by TxDOT. Though these templates and libraries are subject to change, the user may save PGSuper project data with its associated templates, libraries and settings in a .pgs file which can subsequently be opened by PGSuper preserving the templates, libraries, settings and design data of the bridges as originally designed. 2ff7e9595c
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