The following design method can be used for normal weight concrete with specified compressive strengths up to 15. A load factor rating example is shown in this subsection. Bridge design and drafting manual october 2016 oregon department of transportation section 1 design. Detailed updates deck overhang design 5172017 bridge office mndot. Second, the superstructure of the bridge is the horizontal platform that spans the space between columns. Eight walls spaced 11 feet apart bring total loads of 120 kips each from the stiff deck to a concrete arch below.
Suspended loads when required shall be considered in the design and shall not exceed the value shown in the contract documents. Performing organization name and address hdr engineering, inc. Bridge construction standards permanent metal deck forms. Structural design guidelines for concrete bridge decks reinforced with corrosionresistant reinforcing bars abraham lama salomon graduate research assistant cristopher d. Lrfd design examples federal highway administration. New materials for stayinplace bridge deck forms, summary of. Precast prestressed concrete i bridge deck panels prepared by pci committee on bridges donald goldberg. The strip method concept results in providing the main reinforcement in the transverse direction of the deck. If bridge geometry is such that drains are required, the number of drains should be minimized as much as possible while still providing a bridge deck drainage design that meets required standards. Diaphragm design example 93 typical fastener layout 94 1.
The arch is a concrete slab that is 8 inches thick and 16 feet wide throughout the. Steel bridge, deck design, concrete deck, precast concrete deck, wood deck, metal grid deck, orthotropic deck. For longitudinal beam bridges, two conditions are checked in the transverse direction to design the deck reinforcing steel. Distance from left edge of deck to superstructure definition reference line. Composite design provides an advantage in reducing the necessary section of primary members and also serves to significantly stiff en the bridge. Bridge is here to help you in these important decisions with our durable and sustainable floor and deck options. Corrugated metal may rest on top of or between the alreadyplaced bridge framing. This is a partially finished form diagram of a bridge that will span 99 feet.
Coefficients for moments and deflections shall conform to the steel deck institutes design manual for composite decks, form decks and roof decks and the ansisdird1. Bridge construction standards permanent metal deck forms author. The following is a summary of the major changes that have been incorporated into the deck design guide. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. The most commonly constructed deck element is the concrete deck slab.
Indian standard code is followed and basically the design. February 2014 research project final report 201409. 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. Bridge design guide 11 txdot january 2020 chapter 1 about this guide. Twospan continuous straight wideflange beam bridge.
The following design method can be used for normal weight concrete with specified. 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. Diaphragm design manual design method sdi 1995 is based on the. Kansas department of transportation bridge construction manual. Deck pour sequencing 20 july 24, 2012 construction loading example for steel beam bridge. These examples are intended to help designers understand the key issues as they undertake wood highway bridge design. Unless noted otherwise in this chapter of the ndot structures manual, the lrfd specifications applies to the design of bridge decks in nevada. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 45 future wearing surface. It is designed to assist in the preparation of the sales contract by providing con tract details which can be adopted by reference. Co n t ra c t o r s, for example, do not have to buy or lease an entire system to assemble bridge deck f o r ms more efficiently. Section 5 bridge decks new york state department of. 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. Key words igirder, curved bridge, lifting, erection, construction 18.
The bridge design detailing manual guidelines listed below are developed and maintained by the structure design detailing technical committee within the division of engineering services des. Bridge design excel sheet contains on the analysis and design of bridge. Together they interact to form the structural framework of the bridge. Dc1 concrete 150 lbsft3 dc2 stayinplace formwork 15 psf. For deck design, aashto special provisions for hs 2044 and h 2044 loads apply, and a 12,000pound wheel load is used unless otherwise. Lrfd bridge design manual bdm colorado department of. The choice of floor and deck construction for your bridge is important to your bridge design. The west virginia dot wvdot bridge design manual 2006 section 3. The girders are considered rigid supports with no settlement. Department of civil and environmental engineering virginia polytechnic and state university vctir project manager. All idot design guides have been updated to reflect the release of the 2017 aashto lrfd bridge design specification, 8th edition. Form deck is designed to serve as a permanent steel base for poured reinforced concrete floor slabs.
One bridge has a gluedlaminated deck and the other has a stresslaminated deck. Worked examples on bridge design with eurocodes, 1718 april 20, st. 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. However, no attempt has been made to ensure that there were no errors in the conversion process. It has been accepted for inclusion in unf graduate theses and dissertations by an authorized administrator of unf digital.
The precast deck panel system is designed using the strip design method, where a transverse strip of the deck is analyzed as a continuous beam supported by the bridge girders. Mb0216 joist spacing double s p a c i n g safe spacing l in inches of supports for double ledger continuous overthree or more spans 1 all values based on 2005 nds. Kansas department of transportation design manual volume iii us lfd bridge section version 109 5 1 1 5. Since revisions or additions to the design file drawings may occur at any time, the receiver agrees to indemnify, defend and hold. Abstract the purpose of this example is to illustrate the use of the aashto lrfd bridge design for the design of a continuous two span steel igirder bridge. Construction loading example bridge typical section 17 construction loading example.
Design of deck reinforcement, including flexural resistance, limits of reinforcement, and control of cracking is based on aashto lrfd bridge design specifications 5. Rettner, primary author american engineering testing, inc. The first design step for a concrete bridge deck is to choose the correct design criteria. Problem of design of deck slab bridge part 12 youtube. Guidance for handling asbestos in construction projects. Steel grid open a steel grid deck system made without concrete fill. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. Bridge design guide the texas department of transportation ftp. Fundamentals of posttensioned concrete design for buildings. Construction loading example deck slab tension check.
Structural design guidelines for concrete bridge decks. This design should always be used unless approval to use a thinner deck is obtained from the state bridge engineer. For this example, select within since the reference line will be placed at the cl of the deck. Section 3 specifies loads for bridge decks, section 4 specifies their analyses, and section 9 specifies the resistance of bridge decks. Bridge publications texas department of transportation. The west virginia department of transportation, division of highways standard specification, roads and bridges adoped 2000, as amended by the supplemental specification dated january 1, 2003, the ciontract docuents, and. The primary objective in using frc in bridge decks has been to reduce deck cracking and the widths of cracks resulting from repeated dead and live load applications as well as environmental factors. This structural slab is designed to be between 7 and 9. In addition, a large variety of bridge deck panel applications in pictorial form are included. The paper presented herein deals with the analysis and design of tbeam bridge super structure using limit state method of design irrespective of conventional working stress method of design. To define the reference line at the bridge cl divide the deck outtoout width by two. Deck forms for girder bridges concrete construction. Evaluation of the empirical deck design for vehicular bridges. See the current staff bridge design memo 601 for descriptions of effective span and general deck slab design information.
Partialdepth precast deck panel a reinforced or prestressed concrete deck panel that makes up the lower portion of the bridge deck that is combined with a reinforced castinplace concrete topping to form the completed structural deck. The design provisions are presented in the form of suggested aashto bridge design specification changes based on a synthesis of the findings from both the durability and structural phases of the study. Receiver agrees that wsdot cannot be held responsible for problems arising from files which have been converted. And examples sequential design procedures and examples are included in this chapter to. Lowcost design alternates, which include reducing the number of steel girders with hps. Many references to section 5 of aashto have been updated to reflect the reorganization of the section. Structures design office lrfd design examples files pdfs fdot. The slab must be continuous over three or more supports. Nevertheless, limited guidance is available for the design and testing of frc materials for bridge deck applications. Building a concrete bridge deck typically requires crews to construct.
The free encyclopedia for uk steel construction information. Lrfd steel girder superstructure design example lrfd. As stated in the policy manual, txdot bridge design manual lrfd, limit. Chapter 15 structural design requirements for designbuild. Behavior and design of link slabs for jointless bridge decks. Structurally, form deck provides a strong efficient section for forming slabs, while giving lateral stability. One company manufactures re u s a b l e, adjustable form hangers that re p o rt e dly speed the placing and stripping of b r idge deck form w o r k fi g u r e 3.
Description of input for concrete slab rating program column description unitsdata type. More detailed design related to specific bridge types. The bridge deck is designed in accordance with the. These equations make it easy and fast for the bridge designer to compute moments and shears in gluedlaminated decks. Form deck provides a strong, secure, stay inplace form for poured concrete applications. Chapter 17 superstructure general january 2020 173 17. Each example is based on a singlespan, simplysupported gluedlaminated girder bridge. Worked examples presented at the workshop bridge design to eurocodes, vienna, 46. Bridge deck drainage roadway and bridge deck profiles shall be adjusted as much as possible to avoid having bridge drains on the bridge. Prestressed precast concrete beam bridge design click here for table of contents. These standard guidelines, examples and checklists assist engineers and detailers to produce preliminary design studies, contract plans and other.
Bridge deck modelling and design process for bridges. Overview of fiberreinforced concrete bridge decks final report. Lrfd bridge deck design bridge deck design requirements are covered under idm chapter 404. This design example was edited in 2012 by hdr engineering, inc. Dc dead load from bridge members, formwork, deck, etc. Evaluation of the empirical deck design for vehicular bridges georges elgharib university of north florida this masters thesis is brought to you for free and open access by the student scholarship at unf digital commons.
The guidelines for nonlinear analysis for bridge structure presents a. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. Concrete bridge lrfd specifications parsons brinckerhoff page 7 4. Structures design office lrfd design examples files pdfs.
Department of civil and environmental engineering virginia polytechnic and state university vctir project. For txgirders, place the phase line as shown in figure 31. West virginia department of transportation division of highways. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. An example showing the practical application of the proposed recommendations.
An appendix section provides a fully worked design example of a bridge deck panel meeting aashto specifications. When building next to an existing structure such as for phased replacements, provide. For composite deck, form deck, and roof deck construction. Fundamentals of posttensioned concrete design for buildings part one. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. Problem on design of rc deck slab part 22 duration. A steel gridreinforced concrete deck system, which can be precast prior to installation, for both temporary and permanent bridge decking applications. Design of transversely prestressed concrete bridge decks. Institutes design manual for composite decks, form decks and roof decks. Twospan continuous straight igirder bridge design example. 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. Equations can be used when designing decks for aasho h10, h15, and h20 trucks.