Finally, a design example for a reinforced concrete bridge deck is provided. Deck forms for girder bridges concrete construction. Threespan continuous straight tubgirder bridge design example. Types and design methods of reinforced concrete bridges are presented. Empirical design utilizes prescriptive detailing as opposed to structural design, and is not advocated by idot. Investigations on simply supported concrete bridge deck slab for irc vehicle 717 loadings using finite element analysis international journal of earth sciences and engineering issn 09745904, volume 04, no 06 spl, october 2011, pp 716719 was modeled and the reinforcing steel was ignored. The new deck incorporated 3inch thick ppc deck planks in spans 1, 2 and 3, and metal stayinplace forms in spans 4 and 5. Notes author staff bridgesight software sponsor bridgesight software. This investigation addresses the lrfd and standard design methodologies of concrete deck slab, deck overhang, barrier and combined barrierbridge overhang. Nysdot bridge deck evaluation manual for recommended deck evaluation methods and. Bridge railing and deck design example civil engineering. For bridge deck design load determination, the design code has a specified truck to. If bridge maintenance structure is totally separate structure, it shall be designed for hs2044 live load. By modelling the bridge deck geometry and stiffness to represent its actual behaviour in the best way c.
The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation of the aashtolrfd bridge design specifications. For the deck types discussed herein, a brief description of the particular deck type is given, in addition to general design and detail considerations. In addition, a fully worked design of a bridge deck panel meeting aashto specifications is provided in. Idot bridge manual provides a step by step process with a solved example to determine the spacing for no. The integral wearing surface is considered in the weight calculations. Investigations on simply supported concrete bridge deck slab. Parallelwire cables stranded cables a cable may be composed of one or more structural ropes or structural strands. Chapters i, 10 and 11 and appendices i and ii give design criteria and outline in detail practical design procedure which is illustrated by numerical examples. The design is performed in accordance with the aashto lrfd bridge design specifications, 5th reference to aashto articles, tables and equations is shown along the right margin of the document using square and design at the critical sections in positive flexure, shear and deflection due to prestress, dead loads and live load are shown. Dec 02, 2015 civilax on nanosoft nanocad design bim v1. Thruway structures design manual 4th edition section 3.
Structural design guidelines for concrete bridge decks. Free flat, ontheground deck plan with pdf blueprint download. Title reinforced concrete slab design using the empirical method publication no. The washington state department of transportation wsdot makes these documents available on an as is basis. Bss090119991 abstract this design example illustrates the empirical design method for composite concrete bridge decks specified in article 9. Pdf fast and easy dimensioning of filler beam bridges. Throughout this guideline, the term lrfd, when followed by a section or table number, is used as a reference to. Mar 19, 2014 click on a datetime to view the file as it appeared at that time. A load factor rating example is shown in this subsection. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 43 for this example, a slab thickness of 8 in. The guidelines for nonlinear analysis for bridge structure presents a collection of general recommendations for the modeling and analysis of highway bridges and overpasses subjected to earthquake ground motions, required for the design or evaluation of the capacity and. It assists texas bridge designers in applying provisions documented in the aashto lrfd bridge design specifications, to which designers should adhere unless directed otherwise by this document. The example illustrates bridge deck design in accordance with the aashto lrfd bridge design specifications aashto, 2012 and the california amendments caltrans, 2014.
These instructions apply to projects in which the decking runs parallel to the wall of the house. Free ground flat deck plan with pdf blueprint download. However, when not properly designed or protected, timber struc. Bridge deck modelling and design process for bridges. The slab moments from fea agreed reasonably well with the.
January 01, 2020 purpose this manual documents policy on bridge design in texas. It is found herein that the aashto lrfd bridge design specifications distribution. Notation of the nds as the source of design requirements in this chapter reflects references in aashto that specify the nds as the most current source of timber design information for bridges aashto. A pile design example reflecting the procedures in the guideline is included in the appendix. Guidelines for the design and construction of railroad overpasses and underpasses 5 structure shall be designed for e80 load to accommodate any future track needs or modifications. The design of the standard steel deck truss bridge is effective for spans of between 12m to 90m. The first design step for a concrete bridge deck is to choose the correct design criteria. The guidelines for nonlinear analysis for bridge structure presents a collection of general recommendations for the modeling and analysis of highway bridges and overpasses subjected to earthquake ground. Concrete bridge lrfd specifications parsons brinckerhoff page 7 4. How to build the best deck developing the design and materials list follow the steps below to determine the lumber necessary for your deck. Hambly, bridge deck behaviour, chapman and hall, 1976, first edition e. Use these design values to determine the reinforcement required at the critical section see bdm section 9. Comprehensive design example for prestressed concrete psc.
Worked examples on bridge design with eurocodes, 1718 april 20, st. The most common types of cables found in the market are. Instead cantilever overhangs are designed using the approximate strip method described above and used in the design example below. This system used load and resistance factors to ensure a stable bridge with sufficient strength. Thruways preferred, and most commonly used, new deck design. Lrfd bridge deck design bridge deck design requirements are covered under idm chapter 404. If any part of the deck construction exceeds 3m in height.
These topics and design examples are published separately for ease of use, and available for free download at the nsba and fhwa websites. The present simplified design analysis procedures can be used to develop new efficient frp sections and to design frp highway bridge decks and deck stringer systems, as shown by an illustrative. The theoretical principles has been expounded in the book of edmund c. Steel bridge, deck design, concrete deck, precast no restrictions. Where the deck platform is more than 300mm 1 ft from the ground effective 1 october 2008. The purpose of this report is to present guidelines for the design, manufacture, handling, shipping and erection of precast prestressed concrete bridge deck panels. Constrution of a field test bridge for evaluating deck design. This document is intended as a design manual for the application of grillage analogy method for the bridge deck analysis. Threespan continuous curved igirder beam bridge design example. Design manual for orthotropic steel plate deck bridges aisc. The deck overhang itself is not designed using this method. Lrfd steel girder superstructure design example lrfd. Design memo 601 for descriptions of effective span and general deck slab design information.
The document also includes instructional commentary based on the aashtolrfd bridge design specifications second edition, 1998, including interims for 1999 through 2002. 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. This design should always be used unless approval to use a thinner deck is obtained from the state bridge engineer. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. Departments of transportation adopted the aashto lrfd bridge design specifications during the year 2007, which is mandated by aashto and fhwa. Bridge dead load capacity superstructures capacity to carry a heavier barrier system versus. Evaluation of the empirical deck design for vehicular bridges. For this reason new design tables for filler beam structures in germany have been developed, which enable the planner a fast and direct determination of all relevant crosssectional data of single. For a deck without superelevation, the top of the deck has a central parabolic crown and a 2. Click on a datetime to view the file as it appeared at that time.
Calculate the internal forces and moments according to eurocodes principles b. Structural behavior and design of barrieroverhang connection. The second project constructed in 1999 and 2000 with ppc deck planks is located in. Bridge design free download as powerpoint presentation. Since oh 40% of beam spacing, must perform special design. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. Approximate elastic method, or equivalent strip method aashto 4. 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.
Today the stru c t u r al design of deck forms remains much the s a m e, but contractors often re p l a c e lumber with pre f a b ri c a t e d, reusable materials to make form s m o r e efficient and to support g reater loads. The examples used in this paper relate to the design of typical. The present simplified design analysis procedures can be used to develop new efficient frp sections and to design frp highway bridge decks and deckstringer systems, as shown by an illustrative. Civil engineering spreadsheets, civil engineering ebooks and many more civil engineering downloads. Description of input for concrete slab rating program column description unitsdata type 1 load type one numeric character 1 colorado trucks use for bridges carrying colorado highways, i. 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. Seat elevations for the constantheight beams or girders are varied in the design to create the overall crown in the deck. Construction of a field test bridge for evaluating deck design details when properly designed and protected from elements such as water, insects, and fire, timber is a structurally capable, costeffective, and aesthetically pleasing material suitable for many structural applications. Common re p l a c e deck forms for girder bridges by moira a. Situations requiring planning permission where the deck is situated within 20 metres of a highway. Reinforced concrete slab design using the empirical method. Refined analysis utilizes finite elements, which is unnecessary for standard deck design. Concrete decking is not relocatable, so on these we use a thick 8mm antiskid galvanised steel decking.
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