Comprehensive design example for prestressed concrete psc. Recommendations for possible modifications to the 1998 american association of state highway officials aashto lrfd bridge design specifications are provided. This manual documents policy on lrfd bridge design in louisiana. The aashto lrfd bridge design specifications and the wsdot bridge design manual bdm are the basic documents used to design. This manual is intended to provide general guidance, and not solutions that are specific to any project. The crosssection of the bridge is type b as described by aashto table 4. Key words prestressed concrete, lrfd, design, bridge girders, u54. An hl93 live load structural check determines if an hs20 or a tandem axle vehicle controls.
It assists texas bridge designers in applying provisions documented in the aashto. Lrfd gravity wall design methodology 17 pages example lrfd gravity wall calculations 20 pages example lrfd spreadsheet output 12 pages the example calculations and example. This manual and the current editions of the following aashto specifications are the basic documents used to design highway bridges and. Structures design office lrfd design examples files pdfs fdot. A pile design example reflecting the procedures in the guideline is included in the appendix. The most current versions of the above referenced manuals including all interims or design memoranda modifying the manuals shall be used.
The second phase of project 2007task 306 involved the development of design examples to illustrate the proposed changes to the strutandtie provisions of the aashto lrfd bridge design specifications. Lrfd bridge design manual bdm colorado department of. Design manual for bridges and structures sixth edition, 2016 nj. The height of cover tables will vary when a different design method is followed. Standards the following design standards were utiliz ed in this example. Documents to aid in permit issuance and rating of the bridge. Lrfd design example for steel girder superstructure bridge fhwa. The manual is based on the aashto lrfd bridge design specifications, seventh. Multimedia package for lrfd concrete bridge design rosa p. Bridge design manual lrfd 12 txdot 012020 chapter 1 about this manual section 1 introduction section 1 introduction implementation load and resistance factor design lrfd is a design methodology that makes use of load and resistance factors based on the known variability of applied loads and material properties. View example in pdf format design example 1 download example as a mathcad workbook zip. Lrfd design for overhead sign structures, structural supports for cctv cameras, rwis, and noninvasive pavement sensor systems, and their foundations straight anchor rods for foundations to. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. The manual files are not currently available in an ada accessible format.
Designed structures that are aesthetically pleasing, constructible, durable, economical. Appendix c proposed revisions to the aashto lrfd bridge. This design example is for end bearing piles that are driven through cohesive soil and tipped out in rock. As a general guideline, all columns in a single column bent structure are analyzed, designed and. Rectangular reinforced concrete bent caps materials geometric constraints structural analysis design criteria. The third edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel i and. Note, the material in this bridge design manual is supplemental to thespec ifications listed and takes precedence over them. Incorporation of foundation deformations in aashto lrfd. Iowa dot office of bridges and structures january 2019.
Abutments materials geometric constraints design criteria 4. Incorporation of foundation deformations in aashto lrfd bridge design process first edition a product of the shrp2 solution, service limit state design for bridges february 08, 2016. Implementation of lrfd geotechnical design for deep foundations using texas cone penetrometer tcp test and final recommendations. Aashto lrfd bridge design specifications available in 2017. The three parts of the massdot lrfd bridge manual 20 edition are sized to fit into two three ring binders as follows. Aashto lrfd bridge design specifications specific to new mexico bridge design practice so that uniformity in bridge design procedures will be attained. Implementation of lrfd geotechnical design for deep. New software streamlines lrfd design process, summary of. This report provides a discussion of design issues related to gfrpreinforced bridge decks and is followed by a design example. Nonbattered micropiles in the case of pier 1eb resist large. This design example presents the procedures to calculate pile.
Structures design office lrfd design examples files pdfs. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. The kansas department of transportation, the state of kansas, nor its officers or employees, by making this website and documents available for use by persons outside of kdot, does not undertake any duties or responsibilities of any such person or entity who chooses to use this website and documents. Engineered solutions structural plate design guide 7. To reference an article in a publication, the abbreviated reference in a bold font followed by a numerical reference in brackets is used. It includes some pdf documents containing explanatory examples and an. Design example 6 appendix a example 6 deck design, inlcuding collision on a type 7 or type 10 m barrier example 6. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. New bridge design information is continually developing. Approximate elastic method, or equivalent strip method aashto 4.
Calculations for axial side resistance follow the methods listed in the aashto lrfd bridge design specifications, 7th edition, 2014, unless otherwise indicated. References made to specific sections in the aashto lrfd and dm4 code will be prefaced with an a and d, respectively. Lrfd micropile design and testing for major urban bridges. The lrfd bridge design manual contains mndot bridge office procedures for the design, evaluation and rehabilitation of bridges. The below documents consist of a comprehensive steel girder bridge design example, with instructional commentary based on the aashto lrfd bridge design specifications second edition, 1998, including interims for 1999 through 2002. The steel girders have fy 50 ksi and all concrete has a 28day compressive strength of fc 4. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. New software streamlines lrfd design process w hen wisdot and other states adopted aashto load and resistance factor design methods in 2007, it signaled a shift to a more precise approach to bridge design, one that would consider both the structural contributions and configurations of individual bridge. Detailed design examples for an aashto type iv girder and a texas u54 girder using both the aashto standard specifications and aashto lrfd specifications were also developed and compared. It includes some pdf documents containing explanatory examples and an overview of the strategic development of this structural code. Apply the lateral force, c, at the top end of post and design as a.
Steel girder design example using 3rd edition aashto lrfd. Aashto lrfd bridge design specifications, section 11. Load and resistance factor design lrfd for highway bridge. Designed structures which meet the requirements of the wsdot bridge design manual m 2350, aashto lrfd bridge design specifications, current structural engineering practices, and geometric criteria provided by the region. If a computer program is used in the designanalysis of the bridge, the name, version, and release date of the software shall be noted on. Incorporation of foundation movements in aashto lrfd. Lrfd design example for steel girder superstructure bridge. For other design load considerations, please contact your local contech representative. Bridge manual binder cover graphics for both binders are available for download as pdf files. Njdot design manual for bridges and structures 6th edition, 2016. This manual documents policy on bridge design in texas.
References to file in this section of the bridge design manual will be. This document presents the theory, methodology, and application for the. All equations and related variables are defined within the spreadsheet. This document consists of a comprehensive steel girder bridge design example, with instructional commentary based on the aashto lrfd bridge design specifications second edition, 1998, including interims for 1999 through 2002.
Bureau of bridge design staff, bridge design consultants, fhwa, and nhdot bureaus the bureau of bridge design is updating the bridge design manual. This ei officially adopts the aashto lrfd bridge design specifications, seventh edition 2014 with 2015 interims, for use in new york state and announces the availability of the nysdot lrfd blue. The design of steel structures is covered in section 6 of the aashto lrfd bridge design specifications and only straight steel bridges are covered in the provisions as of this writing. The analysis that served as the basis for this design example was performed using the aashto opis software. Officials aashto lrfd bridge design specifications. Example 92 lfr with deterioration example 93 lrfr general example 94 lrfr with deterioration. Design, construction, and maintenance of bridge decks. It is a supplement to the latest edition of aashto lrfd bridge design specifications, which designers should be adhere to unless directed otherwise by this document. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. Use of micropiles in bridge design fhwa micropile design and construction is an important reference to consider all design elements. The following design method can be used for normal weight concrete with specified. Impact of lrfd specifications on design of texas bridges. Aash to lrfd bridge design specification, 7th edition, 2014 michigan department of transportation bridge design manual, volume 5 michigan department of transportation bridge design guide.
Mndot bridge office lrfd bridge design manual minnesota department of transportation 3485 hadley avenue north mail stop 610 oakdale, mn 551283307. Multimedia package for lrfd steel bridge design by. A twospan continuous composite igirder bridge has two equal spans of 165 and a 42 deck width. Except where noted, the design provisions employ the lrfd methodology set forth by aashto. The design methodologies presented conform substantially to aashto specifications lrfd bridge specifications 2012. Lrfd bridge design manual bdm the intent of the cdot bdm is to complement current american association of state highway and transportation officials aashto load and resistance factor design lrfd specifications with current interim edition and to provide interpretations applicable to the design of colorado projects. This is a twovolume report that documents the findings of a txdotsponsored research project to evaluate the impact of the load and. Spreadsheet design of mechanically stabilized earth walls.