Aashto Standard Specifications For Highway Bridges 15th Edition Pdf

[Author Metcalfe]

FederalHighway Administration (FHWA) regulations incorporate by reference a number of standards, policies, and standard specifications published by the American Association of State Highway and Transportation Officials (AASHTO) and other organizations. (See 23 CFR 625.4). Many of these incorporated provisions may be relevant to maintaining structural stability during the erection process. For instance, as of May 17, 2010, in many cases FHWA requires a Registered Engineer to prepare and seal working drawings for falsework used in highway bridge construction. (See AASHTO Specifications for Highway Bridges, Div. II, 3.2.1, 15th edition, 1992, which FHWA incorporates by reference in 23 CFR 625.4). FHWA also encourages compliance with AASHTO Specifications that the FHWA regulations do not currently incorporate by reference. (See )

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BGS Version 8.1, the initial release of BGS (June 2007), was developed from TxDOT Roadway Design System (RDS) Version 8.0 by removing all non-bridge related RDS commands. The result of these changes to RDS is BGS, a "scaled down" implementation of TxDOT RDS that focuses on bridge geometrics. BGS v8.1.7.2 was deployed in November of 2011 as a technical release to address OS issues with v8.1.7 (i.e. 8.1) released June 2007.

BGS, Version 9.1 includes a large number of fixes to bugs reported since the release of BGS Version 8.1 as well as enhancements to address user's concerns, including reducing system limitations on numbers such as the number of diaphragm lines that could be defined. Such limitation existed since long before the release of RDS Version 8.0. For a complete listing of the changes made to BGS Version 8.1 to yield BGS Version 9.1, see the Release Notes for BGS Version 9.1 installed with the software. This software product was developed by TxDOT for the use of TxDOT engineers and consultants and is maintained by the Texas Department of Transportation.

The current draft of the BGS v9.1 User Guide is over 360 pages long. Due to file size and for other reasons it is not deployed directly to the end user's machine but is rather stored on TxDOT_s FTP server. Users can access the guide via a link to it installed in the Bridge Geometry System (BGS) program group. This decoupling of the BGS User Guide from the packaging of the software allows for revision on an as-needed basis throughout the life of BGS v9.1. This BGS User Guide, like the old RDS User Manual, should provide all the information that the user will need to run the software.

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.

BridgeLink has been collaboratively developed and maintained by the Washington State Department of Transportation (WSDOT) and the Texas Department of Transportation (TxDOT) under the Alternate Route Project initiated and managed by WSDOT. ( )

BridgeLink User Guide (March 2020)

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.

Custom defined beam shapes that fit within each family of girder types supported by PGSuper can also be added to the user copy of the templates, thereby extending the girder shapes that the user can design, analyze, and load rate with the program.

The flexural design feature computes the required number and pattern of prestressing strands and the minimum required release and final concrete strengths. Specification checking evaluates girders for compliance with strength, serviceability, and detailing criteria. Horizontal and vertical shear design, analysis, and load rating is also facilitated.

A variety of results reporting is provided, including exhaustive and comprehensive reports, reports tailored to specific design or analysis features, fabricator optional design evaluation reports, and a TxDOT Girder Schedule Report ("TxDOT CAD Output").

Certain functionalities of this version of PGSuper have been enhanced over that of the previous release, and most known issues/bugs present in the previous release are fixed in this release. For a list of these changes see the PGSuper support Information Document.

CULV5 is an analysis tool for concrete box culverts. The program determines the forces acting on each of the different members of the culvert using the direct stiffness method. The user provides input data for loading conditions, structure geometry, and member sizes. The program outputs the member forces for use in either a working stress design or a load factor design in accordance with the AASHTO Standard Specifications for Highway Bridges, 17th Ed. for highway loadings, and AREMA 2006 in the case of E72 and E80 loadings.

Properties of standard I beams, Dbl-T beams, U beams, Slab beams, Box beams, TxGirders, Decked Slab beams and X-beams are included in the program's beam section library. User defined beam shapes can be designed and analyzed using the non-standard beam option.

PSTRS14 Version 6.1, incorporates enhancements and modifications versus v5.2, including:consideration of End Distance, Transfer Length, and Beam Length that were ignored in all prior versions of PSTRS14;updating provisions of the AASHTO LRFD BDS (thru the 12th Edition);implementing the new loss method proposed in Research Project 0-6374, "Effects of New Prestress Loss Predictions on TxDOT Bridges";bug fixes to the v5.1 implementation of the complex AASHTO LRFD loss of prestress methodology, that was introduced in the 4th Edition (2007) and remains the AASHTO method beyond the 6th Edition; andimplementation of an Optional Life Cycle Camber Report allowing PSTRS14 users to get a report on estimated time dependent camber history based on critical stages in the life of the beam/bridge, including at end of service life.

Following the precedent set by the release of BGS v9.1 the PSTRS14 v6.1.1 User Guide is not deployed directly to the end user's machine but is stored on the TxDOT FTP server. Users access the guide via a link installed in the Prestressed Concrete Beam Design & Analysis Program (PSTRS14) program group.

See the PSTRS14 Support Information Document, linked in the same manner as the PSTRS14 v6.1.1 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 PSTRS14 users and any consultant PSTRS14 users designing bridges for TxDOT.

The SignsPC application is used in conjunction with the MicroStation computer-aided drafting application. SignsPC extends MicroStation by providing the user with a toolkit for generating and labeling traffic signs. The toolkit also includes a lettering feature to accurately place lettering cells spaced according to standard specifications.

The default installation is for Adobe Acrobat DC and can be change for other versions at the time of installation. This add-in has been tested for compatibility with Adobe Acrobat Pro version XI and DC. It is advisable to ensure that critical markups are retained on plan sets when using different versions of Adobe Acrobat Pro.

The Texas Bridge Load Rating Program (TBLRP) uses a working stress (WS) analysis method which produces an allowable stress load rating. This load rating methodology is in accordance with the AASHTO Manual for Condition Evaluation of Bridges, 1993, and the AASHTO Standard Specifications for Highway Bridges, 14th Ed., 1989. This program simplifies the load rating of nonstandard bridges that are commonly found on rural roads off the state and federal highway systems. The program emphasizes standardized and efficient load rating with a goal of minimizing clerical and computational errors inherent in manual methods.

UT Lift is an easy to use, macro-programmed Excel spreadsheet for determining the behavior during lifting of straight and horizontally curved steel I-girders with one crane and two lift clamps.

UT Bridge is a 3-dimensional finite element program for the analysis of curved steel I-girders and steel tub girders. Computations include linear elastic analysis (first-order and second-order) and eigenvalue buckling analysis for both girder erection and concrete deck placement.

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