A detailed explanation will be given of the checksto be carried out, the aspects to be considered in the design and the construction procedures and sequences of a posttensioned slab. 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. These materials are originally located at different websites. The washington state department of transportation wsdot makes these documents available on an as is basis. Reinforced concrete bridges theory and design of bridges. Pdf 3 analysis and design of deck slab satya narayana.
Ice manual of bridge engineering ice virtual library. Design and field demonstration of ecc link slabs for jointless bridge decks michael lepech and victor c. Wsdot policy is to design using gross section properties bdm 5. Pci has developed preliminary design charts in accordance with the aashto. Design of reinforced concrete bridges department of civil. Dec 02, 2017 i suggest you to listen to the video and make notes of your own, that makes you confident if you still want to download it, its not free please click th. Opens the bridgeware association window allowing you to specify this current bridge as a virtis, opis or virtisopis bridge and also to link this current bridge to a bridge in the pontis database if pontis is installed. Girder analysis and design is performed using the computer program conspan, version 09. The minimum spacing of reinforcing bars should preferably be 6 in. A civil engineer should study these lectures and materials for structural engineering acumen. A civil engineer must know all the aspects regarding the flat floor system. At the same time as wood beam bridges and wood frame bridges, stone slab bridges were also used widely. Tutorials on bridge design and assessment with examples. Reinforced slab bridges used for short spans, a solid reinforced concrete slab, generally cast insitu rather than precast, is the simplest design to about 25m span, such voided slabs are more economical than prestressed slabs.
Where applicable, you can see countryspecific product information, offers, and. The original bridge and structures design manual was created through the publicprivate partnership of the georgia department of transportation and the consulting engineering companies of georgia. Flat slab analysis, design and detailing pdf civil. Please direct any questions on the content of this document to the bridge design section director, bridge division, texas department of transportation. A comparative design of reinforced concrete solid slab bridge for. A basic introduction to the design codes and methods of anlysis. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design.
For simply supported spans, this limit is generally found to be nearly 10 metres and for continuous or balanced cantilever type. A decrease in moments from solid to voided slabs is about 11%, 7% and 5. Reinforced concrete slab bridges design considerations haunched slabs straight haunches preferred in lieu of parabolic depth at pier should be 2 2. After reading this article you will learn about the design of slab and girder bridges. Key words steel bridge, deck design, concrete deck, precast concrete deck, wood deck, metal grid deck, orthotropic deck 18. Deck is 46 ft wide with a 15 degree skew roadway is 44 ft wide. In addition to general design guidance and information on detailing practices, this section contains three design examples. Reinforced and prestressed concrete are used extensively in bridge projects. This manual documents policy on lrfd bridge design in louisiana. Planning and preliminary design of slab bridge ref. Bridge approach slab analysis and design incorporating elastic soil support presented by. The manual is based on the aashto lrfd bridge design specifications. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded.
Design and field demonstration of ecc link slabs for. Reinforced slab bridge designaashto allowable stress design method. If the outtoout width of a slab bridge exceeds 45 ft. Semiintegral construction may be used in lieu of expansion joints for single span bridges under 300 feet with the approval of the bridge design engineer.
If this box is not checked, the rating will use section properties computed. Continuous span reinforced concrete slab bridge vdot. The integral wearing surface is considered in the weight calculations. For the deck types discussed herein, a brief description of the particular deck type is given, in addition to general design and detail considerations. Reinforced slab bridge designaashto allowable stress design. Longitudinal steel should be detailed in a 2bar alternating pattern, with one of the bars continuous through the slab. Bridge standard detail sheets change transmittal pdf summary of revisions pdf support. Slab frame bridge, structural design, cost optimization, optimization of environmental impact, life. Your project should complement the beauty of your home, and not be a foreign element. The deck may consist of 3 girders spaced at 2, 45 m. Flat slab analysis, design and detailing pdf flat slab system is an important division of concrete floor system. Assign depth of slab using deflection control criteria and sizes. Specifications and aashto lrfd bridge design specifications.
Flat slab analysis, design and detailing pdf civil engineering. Lrfd slab bridge design procedure, equations, and outline. The effective width equations in the aashto standard. Structures design office lrfd design examples files pdfs. Pdf on apr 10, 2017, nabeel albayati and others published structural bridge design chapter 5example2 of reinforce concrete bridge 2017 find, read and cite all the research you need on.
Wsdot bridge design engineers with a guide to the design criteria, analysis. Design of bridge slab spreadsheet reinforced slab bridges used for short spans, a solid reinforced concrete slab, generally cast insitu rather than precast, is the simplest design to about 25m span, such voided slabs are more economical than prestressed slabs. V slab variable depth slab bridge design is a structural analysis and design software package developed for reinforced concrete flat or haunched slab bridges under the american association of state highway and transportation officials aashto lrfd bridge design specifications, 8th edition. A detailed study on variation of bending moments in simply supported skew slab bridges with various skew angles is given in this project using structural analysis software staad pro, and analysis is as per provisions of indian codes irc 6. Flat slab analysis and design pdf flat slab design pdf 1. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. The basic bridge geometry can be found on the bridge layout and 75 slab span details see the appendix, pages 21 and 22. Design problem design a slab bridge to meet the following requirements bridge clear span 6m bearing width of slab 400 mm carriage way two lane footpath on either side of bridge wearing coat asphalt concrete select type of slab, railing, wearing coat and materials require. A debonded zone under the link slab equal to 5% of the two adjacent girder spans to prevent stress concentrations was suggested 9. Sep 09, 2018 features for creating design of deck slab bridge pdf. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. If this box is not checked, the rating will use section properties computed from the total deck thickness. Li university of michigan, ann arbor, michigan, usa abstract the poor durability of concrete bridges throughout the us is an increasingly large concern for highway transportation authorities.
The stone slab bridge a design and technology site. The design of bridge should follow the standard design practices mentioned in the irc and. Deck design follows the nmdot standard deck slab detail in chapter 4 of the nmdot bridge procedures and design guide, hereinafter referred to as design guide. Load and resistance factor design lrfd for highway bridge. Double tee bridge beams 157k, pdf next bridge beams 104k, pdf pci zone 6 curved spliced girders 1. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Lrfd castinplace cip slab span design example county. Slab bridges, due to camber required to address future creep. Department of transportation federal high way administration bridge deck design. Features for creating design of deck slab bridge pdf. Right click the excel icon for the appropriate jurisdiction. Left click save target as and save the file to a desired location on the users computer. Reinforced concrete slab design guidelines a effective span of slab. Open the excel file and the user can locate the proper.
E dge beam design is required for bridges with open joints and possibly at stage construction lines. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is following are the rcc slab design and detailing guidelines. Reinforced concrete slab design using the empirical method. The execution of the design will be explained with reference. It assists texas bridge designers in applying provisions documented in the aashto lrfd bridge design specifications, 2017, 8th edition, which designers should adhere to unless directed otherwise by this document. The details may be incorporated into either the district or the structure plans. Standard bridge drawings autocad file types open best by rightclicking on the link and doing a save target as and saving to your computer or network before opening. Structural details of slab culverts 3 for spans less than 3.
Reinforced concrete slab design using the empirical method bridgesight solutions for the aashto lrfd bridge design specifications bridgesight software tm creators of effective and reliable solutions for the worlds bridge engineers. Purpose of bridgepurpose of bridge a bridge is a structure providing passagea bridge is a structure providing passage over an obstacle without closing the wayover an obstacle without closing the way beneath. Refer to the latest edition of ladotd bridge design manual 4th english edition for. Refer to the latest edition of ladotd bridge design manual 4th. Design and study on behaviour of skew slab bridges with. This help file describes input and analysis features of slab bridge designer 2. Select the straight bar type even if the bar has hooks at the end. Lrfd design examples federal highway administration.
Simple span reinforced concrete slab bridge rating example. This is economic because the dead weight of the slab, although an insignificant part of the load on the slab, is significant to the global design of the bridge. I using refined estimate of prestress losses bdm 5. Check this box if the structural slab thickness should be used to compute section properties for rating. Castinplace deck slab design for positive moment regions. Reinforced concrete slab design and detailing guide is456. Only the design of slab bridge will be used for illustration. In situations where the bridge skew exceeds 30 degrees, consult the bearing and expansion joint specialist and the bridge design. Bridge design guide txdot january 2020 feedback for txdot policy on designing bridges, please refer to the txdot bridge design manual lrfd.
Behavior and design of link slabs for jointless bridge decks. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Using data from the portland cement association engineering bulletin 232, aashto lrfd design of castinplace concrete bridges this example demonstrates how slab bridge designer 2. The steel reinforcement in the concrete slab was improperly designed, resulting in. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 43 for this example, a slab thickness of 8 in. Assign depth of slab using deflection control criteria and sizes of carriageway, footpathkerb, wearing coat and railing. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples.
Master of science and hereby certify that, in their opinion, it is worthy of acceptance. The selection and proper application of the component design and any modifications shown. Deck is 46 ft wide with a 15 degree skew roadway is 44 ft wide type t501 rail 0. Bridge design details 116, use of bridge standard details xs. They are still used today as they are very strong especially if used to cross small gaps. Simple span reinforced concrete slab bridge rating example vdot. All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use. Here analysis of voided deck slab and cellular deck slab. This manual documents policy on bridge design in texas. There was a fashion for very shallow bridges in the 1960s and 1970s as they were considered to look more elegant. Ultrahigh performance fiber reinforced concrete elements pdf. Structural bridge design bridge analysis software integrates loading, analysis, and code checking aashto lfrd, eurocodes, and more throughout the project. Solid slab bridges are horizontal beams supported at each.
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