Guidelines for design of design of deck slab bridge part 12. This publication is the second of two sci bridge design guides that reflect the rules in the eurocodes. Such design ideas as making it a onespan bridge and what material to use in construction, prestressed concrete or steel, were further investigated. Slab bridges are defined as structures where the deck slab also serves as the main loadcarrying component. Structural behavior and design of barrieroverhang connection. For design analysis of frp deckstringer bridge systems, an approximate series solution for orthotropic plates, including firstorder shear deformation, is applied to develop simplified design. Due to simplicity of design and construction, the concrete slab structure is relatively. The first design step for a concrete bridge deck is to choose the correct design criteria. The design principles of a solid slab bridge deck may be illustrated by the following illustrative example. Click the below link to download the notes for nominal fee. This paper presents the results of a test program to investigate the behavior of jointless bridge deck, and proposes a simple design method for the link slab. Analysis and design of link slabs in jointless bridges with. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 41 design step 4 deck slab design design step 4. The michigan department of transportation incorporates link slabs during deck replacements and deep resurfacing.
A short introduction to bridge structures the first bridges. Nowadays, design procedures for concrete slabs regarding bending moment are wellknown. Introduction composite design is when a structural member composed of two or more dissimilar materials joined together and acts as a unit. Effect of slab membrane action on beamandslab deck behavior 67. This results in a debonded link slab with muchreduced stiffness. This investigation addresses the lrfd and standard design methodologies of concrete deck slab, deck overhang, barrier and combined barrierbridge overhang. Slab bridges, due to camber required to address future creep deflection. Loading single lane of class 70r or two lanes of class a. The bridge design manual shall be consulted for deck drain policy requirements. Design step 2 example bridge prestressed concrete bridge design example 8 reinforced concrete deck 110 18 14 5 spa at 9 8 9 55 4 12 total width 52 roadway width figure 22 bridge crosssection 2. These special characteristics of skew bridges make their analysis and design more intricate.
Concrete deck slabs on adjacentframed beams slab beams and box beams anchor. Citylink tulla widening bulla road to power street. However, there is still a lack of wellestablished recommendations for distribution of shear forces from concentrated loads. Software written under iowa highway research board project tr620, update of rcb culvert standards to lrfd specifications. Professor, department of civil engineering, tulsiramji gaikwadpatil college of engineering and technology. Steel bridge, deck design, concrete deck, precast no restrictions. Design a solid slab bridge superstructure having a clear span of 9.
This help file describes input and analysis features of slab bridge designer 2. A load factor rating example is shown in this subsection. Department of transportation bridge deck design using grade 60 steel astm a615, f y 60 ksi and epoxycoated reinforcing steel was compared to deck slab. Design step 2 example bridge prestressed concrete bridge design example materials concrete strength prestressed girders. Superstructure is the portion of bridge structure above the substructure level viz. Baneshwor sankhamul balkumari road at balkumari joining. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 43 for this example, a slab thickness of 8 in. Analytical study of solid flat slab and voided slab using. Bridge approach slab analysis and design incorporating elastic soil support presented by. If these propositions are considered at an early stage in the design process, they will result in an improved long term performance of bridges with integral abutments without increasing the construction costs.
Link slabs are used over the piers developing jointless decks while adjacent bridge spans remain simply supported. Deck slab design spreadsheet civil engineering community. Refer to districtspecific corrosion protection requirements for regions where bridge decks are exposed to deicing agents andor saltwater. Specifically, the flexural moment capacity for both positive and negative strong axis moments, oneway beam shear, punching shear, and deflection are all. It is a companion to a publication giving general guidance on composite highway bridge design. The required passage may be for a road, athe required passage may be for a. This investigation addresses the lrfd and standard design methodologies of concrete deck slab, deck overhang, barrier and combined barrier bridge overhang. Dec 02, 2017 click the below link to download the notes for nominal fee. Reinforced slab bridge designaashto allowable stress design. Design manual for bridges and structures sixth edition, 2016 nj. A variation of the slab design that was developed in the 1930s was the continuous slab bridge, in which a single slab extends over several spans. The following design method can be used for normal weight concrete with specified compressive strengths up to 15. The various parameters like total bay weight, flexural reinforcement, solid perimeter, moment capacity of the voided.
Special design example 5172017 20 from earlier in the memo, for a 7 slab with 2 wearing course, eod thickness and. Pdf 3 analysis and design of deck slab satya narayana. This chapter documents ndot criteria on the design of bridge decks that are constructed compositely in conjunction with concrete and steel girders and top slabs of castinplace, posttensioned box girders. The integral wearing surface is considered in the weight calculations. Approved finishing tools and equipment must be provided. The substructure is the portion of the bridge structure such as pier and abutments above the foundation unit and supporting the superstructure. Both composite deck slabs and form deck slabs can be analyzed and designed for 3 different loading conditions. Pdf design and construction of a reinforcement free. Past experiences from construction failures and learning lessons. Strikeoffs must have the proper crown or straightness. Nov 23, 2015 contents introduction to bridge structures types of reinforced concrete bridge loads that concerned with slab bridges components of slab bridge design steps for slab and edge beam 3.
Behavior and design of link slabs for jointless bridge decks. Combining link slab, deck sliding over backwall, and revising bearings 31. Dec 02, 2017 problem on design of rc deck slab part 22 duration. Topics covered general overview old practice new practice memo 2017. Refer to districtspecific corrosion protection requirements for regions where bridge decks are exposed to deicing agents andor saltwater spray with regularity. Let the crosssection of the deck be assumed as shown in fig. Bridge design and drafting manual may 2017 oregon department of transportation section 1 design. Only the design of slab bridge will be used for illustration. Problem of design of deck slab bridge part 12 youtube. Mar 19, 2014 click on a datetime to view the file as it appeared at that time. Deck drains 102715 this spreadsheet was developed to aid the design of typical strip seal expansion joints.
Click on a datetime to view the file as it appeared at that time. Worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010. Refer to districtspecific corrosion protection requirements for regions where bridge decks are exposed to. Department of transportation bridge deck design using grade 60 steel astm a615, f y 60 ksi and epoxycoated reinforcing steel was compared to deck slab specimens where grade 60 is replaced with crr bars. Bridge deck slabs are one of the most exposed bridge parts and are often critical for the load carrying capacity. By 1982, the sunshine skyway bridge in tampa, florida, had set a new record for concrete bridges, with a main span of 365 m 1,200 ft. Online users can click here to view this illustration in pdf. While the link slab system can provide the benefits of a continuous bridge deck, refinement of the design and detailing of the link slab itself is needed to optimize this bridge deck system and ensure longterm performance.
By 1939, structures with spans of slab up to 70 feet had been designed. Analysis and design of deck slab culvert for different mix. Bridge detailing guide the texas department of transportation. Guidelines for design of design of deck slab bridge part 1. Structural design guidelines for concrete bridge decks. Analysis and design of deck slab culvert for different mix design and span tehsin raza 1, amey r. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Departments of transportation adopted the aashto lrfd bridge design specifications during the year 2007, which is mandated by aashto and fhwa. The authors concluded that the top layer of longitudinal deck reinforcement would be sufficient for linkslab reinforcement. Continuous span structural slab bridge, bridge deck s cracking, crack width, epoxy coated bars,s load testing, fiber. Design of concrete structures shall be based on the requirements and guidance cited herein and in the current aashto lrfd bridge design specifications lrfd, aashto. Description of input for concrete slab rating program column description unitsdata type. Shear distribution in reinforced concrete bridge deck slabs. Khedikar2 1mtech student, department of civil engineering, tulsiramji gaikwadpatil college of engineering and technology, nagpur.
Unless otherwise specified, all code references refer to the aashto lrfd bridge design. The solid flat slab design process follows the provisions made in the aci 31811 and the plastic voided slab design process is modified from the bubble deck design guide for compliance with bca using as3600 and euro code 2. Njdot design manual for bridges and structures 6th edition, 2016. In combining the weight of the superstructure components in addition to the maximum live.
This design guide provides a procedural outline for the design of basic slab bridges using the lrfd code and also includes a worked example. 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. Reinforced slab bridge designaashto allowable stress. Problem on design of rc deck slab part 22 duration. Wisdot bridge manual chapter 18 concrete slab structures.
Finite element analysis of a composite bridge deck core. Bridge decks, linkslab, joints, jointless decks 18. Lrfd steel girder superstructure design example lrfd. Deck overhang design braden cyr bridge engineer may 17, 2017 bridge office mndot. Deckslab is a spreadsheet program written in msexcel for the purpose of analysis and design of slabs on metal deck. Although the design has some advantages, including simpler. The following concrete deck design criteria are obtained from the typical superstructure cross section shown in figure 21 and from the referenced articles and tables in the aashto lrfd bridge design specifications through 2002 interims. A short introduction to bridge structures the first bridges were made by nature as simple log fallen across a stream. Sep 06, 20 deckslab is a spreadsheet program written in msexcel for the purpose of analysis and design of slabs on metal deck. Timber bridges are aesthetically pleasing and blend well in natural surroundings. Steel profile deck, shear connectors, construction stage and composite stage 1. Bridge design to eurocodes worked examples worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010 support to the implementation, harmonization and further development of the eurocodes y. Manual 6 states that by having each element contain steel.
The design of composite slabs and beams is discussed in detail in relation to the eurocodes and bs 5950. The slab must be continuous over three or more supports. For deck with a 7 structural slab plus 2 wearing course. Contents introduction to bridge structures types of reinforced concrete bridge loads that concerned with slab bridges components of slab bridge design steps for slab and edge beam 3. Finally, a complete design of the bridge including girders, columns, abutments and the deck was created. The deck may consist of 3 girders spaced at 2, 45 m. By 1982, the sunshine skyway bridge in tampa, florida, had set a new record for concrete bridges, with a. This project outlines the design of both a steel and concrete girder system and their. Late in the 1970s, cablestayed construction raised the bar for concrete bridges. Concrete deck slabs on igirders, ubeams, spread box beams, spread slab beams, steel plate girders, and steel tub girders anchor. Comparative highway bridge design worcester polytechnic institute. It shall also include returns and wing walls but exclude bearings. For design analysis of frp deck stringer bridge systems, an approximate series solution for orthotropic plates, including firstorder shear deformation, is applied to develop simplified design. This document is available to the public through concrete deck, wood deck, metal grid deck, orthotropic the national technical information service, springfield, va deck 22161.
Design and construction of a reinforcement free concrete bridge deck on precast bulb tee girders article pdf available january 2007 with 1,779 reads how we measure reads. Thus, no linkslab moments can be generated in the deck. Refer to section 9, deck and deck systems, of this bdm for information about acceptable deck reinforcement sizes and spacing. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. The application of lrfd specification initiated numerous research works in this field. See the current staff bridge design memo 601 for descriptions of effective span and general deck slab design information. Analysis and design of link slabs in jointless bridges. Determine live load bending moment for irc aatrack load for bridge by parag pal duration. It gives two worked examples, one for a multigirder bridge and one for a ladder deck bridge. Design of reinforced concrete bridges department of civil.
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