Appendix c prestressed concrete bridge design example task order dtfh6102t63032 c1 appendix c calculations of creep and shrinkage effects see design step 5. Structural concrete structures reinforced concrete construction. Only the design of slab bridge will be used for illustration. Pci has developed preliminary design charts in accordance with the aashto. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. Eurocodes required for concrete bridge design en 1990 en 1991 en 1992 en 1997 design analysis and section design, partial factors design approach, partial factors, foundations, earth pressures etc. Concrete bridge lrfd specifications parsons brinckerhoff page 1 1. The ndot drainage manual, which is the responsibility of the hydraulics section, discusses the evaluation of hydraulic scour for bridge foundations. The purpose of this document is to illustrate how the pgsuper computer program performs its computations. 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. Eurocode 2 worked examples the concrete initiative. Bibm and ermco are delighted to make these authoritative documents available to design engineers, software developers and all others with an interest in promoting excellence in concrete design throughout europe.
Prestressed bridge structural design calculations to the specifications of eurocode bs 54004. Cracks in the concrete are used by bats as a foothold in roosting photo 1. These recommendations in pdf ebook, reported by the joint aciasce committee 343 on concrete bridge design, provide currently acceptable guidelinesfor the analysis and design of reinforced, prestressed, and partially prestressed concrete bridges based on the state of the art at the rime of writing the report. This information ensures the correct analysis takes place. This helps in transmitting the forces formed by the loads to the below substructures. 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. For the bridge in this example, the design method is the equivalent strip width method, specified in pca section 4. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. Impact of lrfd specifications on design of texas bridges. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. Multimedia package for lrfd concrete bridge design rosa p. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. Prepare a repair strategy and determine viable options.
The attachment of traffic barrier service parapet single face or double face to the concrete bridge deck shall be by means of bolting through the full depth of the deck slab. Bss090119991 abstract this design example illustrates the empirical design method for composite concrete bridge decks specified in article 9. Annacis, british columbia, canada fraser river construction duration. Design step 5 design of superstructure prestressed concrete. Lifecycle cost many factors affect the life of a bridge beyond whether or not the superstructure is comprised of steel or concrete such as design, type and frequency of traffic, environment, weather, maintenance and changes in usage and conditions over time. The first goal was accomplished by development of guidelines. Contact your local contech representative for more information. Limit states, combination and partial factors actions, inc. Shear and torsion capacity of a reinforced concrete beam. Design manual for bridges and structures sixth edition, 2016 nj. Superstructure of the bridge bears the load passing over it. Guide specifications for the design of concrete bridge beams prestressed with carbon fiberreinforced polymer cfrp systems, 1st edition, washington, dc, usa. The bdm is a dynamic document, which constantly changes because of the. In this masters project the arch of the munkedal bridge was used as an example.
This document provides guidance for the design of a precast, prestressed beam bridge utilizing the aashto lrfd bridge design specifications. Example 1 choosing a steel subgrade sheet 2 of 6 rev p. Typically, wires or tendons are stretched and then blocked at the ends creating compressive stresses throughout the members entire crosssection. Foundation design recommendations for the bridge are discussed below under the subsection following headings. Substructure design chapter 7 wsdot bridge design manual m 2350.
The hl93 live load is the design live load for bridges designed under load and resistance factor design lrfd. Design of concrete structures shall be based on the requirements and guidance cited. Hs25 is a design loading only, and is not used in load rating. The research was performed to develop guidelines for design and construction and to address issues that significantly influence performance. Bridge construction, project execution plan details of how a bridge is constructed, and how the progress, safety and quality will be monitored and controlled. These components vary based on the type of bridge whether concrete or steel or composite. Appendix a, foundation design concepts, is used to identify acceptable foundation designs based on the manufactured home type and the site conditions. The superstructure of the bridge structure consists of deck slab, girder, truss etc. 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. Comprehensive design example for prestressed concrete girder. The detailed design process is developed in the following chapters, each of which. 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. By the late 1990s, splicedgirder spans reached a record 100 m 330 ft. The publication of the document is at the request of the relevant centc250 sub.
Currently, close to 200 segmental concrete bridges have been built or are under construction, with spans up to 240 m 800 ft. Pdf design and construction of a reinforcement free. Reinforced concrete slab design using the empirical method. Introduction this example illustrates new mexico department of transportation nmdot design procedures for a threespan prestressed concrete girder bridge. Late in the 1970s, cablestayed construction raised the bar for concrete bridges. Prestressed precast concrete beam bridge design click here for table of contents. This manual is intended to better communicate the intent of the plans, standard specifications for state road and bridge construction, special provisions, and project special. Prestress shortening per 100 feet of contributory length will equal. Please refer to the latest edition of the aashto lrfd bridge design specifications4 for details of this design load. In addition, some bats may be hidden from sight in wider cracks in the concrete and behind deteriorating concrete sections in the ceiling or walls. Bridge design specifications second edition, 1998, including interims for 1999 through 2002. Manual for design and detailing of reinforced concrete to the. All manual modifications must be approved by the bridge design engineer.
Design of bridges 1 bridges actions and load combinations pages i1 to i76. New design recommendations are first demonstrated through examples for standard bridge designs. Title reinforced concrete slab design using the empirical method publication no. Also the measures to ensure that the site is environmentally friendly. They are precaste so that they can be easily connected together in order to reach to the required length fig 1.
Concrete deck slabs supported by concrete or steel beamsgirders. Repair of concrete in highway bridges a practical guide define the objective and constraints of repairs. Strutandtie modeling stm for concrete structures, design examples. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. The package includes six practical examples to provide a generic overview of the design. Notes author staff bridgesight software sponsor bridgesight software. Repair of concrete in highway bridges a practical guide. This document includes detailed flowcharts outlining the design steps for all components of the bridge. The specified design strength of concrete is 30 mpa at 28 days measured on standard cylinders. 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.
Main roads western australia structures engineering design manual page 3 of 3 preface. Comprehensive design example for prestressed concrete psc. Bridge approach slab analysis and design incorporating elastic soil support presented by. Eight walls spaced 11 feet apart bring total loads of 120 kips each from the stiff deck to a concrete arch below. Design a concrete mix for construction of an elevated water tank. Long term prestress shortening and shrinkage shall be included in the bearing movement calculation. Lrfd bridge design manual bdm colorado department of. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. The design specifications used in these examples is the aashto lrfd bridge design specifications. Bridge design free download as powerpoint presentation. Bridge construction manual guidelines to project supervisors bridge engineering page 2 revision. Main roads western australia structures engineering design manual page 2 of 6 chapter 01. Types and design methods of reinforced concrete bridges are presented.
Impact of lrfd specifications on design of texas bridges volume 2. The transverse section and profile views of the sample bridge follow. The arch is a concrete slab that is 8 inches thick and 16 feet wide throughout the. The preliminary geotechnical assumptions are checked and recommendations are modified, if necessary. Manual for design and detailing of reinforced concrete to. Section a6 flexural resistance sample calculation from opis to compare with.
Precast, prestressed girder design example pgsuper training 242020 1. Usually of square see fig 14 b, triangle, circle or octagonal section, they are produced in short length in one metre intervals between 3 and meters. Engineered solutions structural plate design guide 7. For all other extreme events, substructure elements shall be designed in accordance with aashto lrfd bridge design specifications.
Prestressed concrete refers to concrete that has applied stresses induced into the member. The electronic version of this document is available at. Design of reinforced concrete retaining wall toe bs 8002. Worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010. Final foundation design the last phase completes the geotechnical report and allows the final structural design to begin. Aashto lrfd bridge design specifications, fifth edition with 2011 interim revisions. This type of bridge provides benefits of rapid construction, and improved structural performance. Introduction this example is part of a series of design examples sponsored by the federal highway administration. Shear design recommendations modify the american association of state highway and transportation officials sectional design method to ensure that crack angles used are physically admissible. These bridges have concrete box girder superstructure s that align with the gore area transitions of the approach spans of bridge 82045. Construction of segmental concrete bridges began in the united states in 1974. Machine finishing for repaired concrete deck surface.
Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. Njdot design manual for bridges and structures 6th edition, 2016 i. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 512 dc parapet 4. Kansas department of transportation bridge construction manual version 1011 kdot bridge section 1. Hueste, mohammed safi uddin adil, mohsin adnan, and peter b. Look for cracking along support beams and inner walls especially below a fillet a. Example of concrete bridge design pages iii1 to iii15 summary iii1 1 description of the bridge iii1 1. Appendix a examples colorado department of transportation. The design process for these bridge structures is not covered in this document. The term reinforced concrete only came into general use later marsh 1905. Structures design office lrfd design examples files pdfs. This is a partially finished form diagram of a bridge that will span 99 feet.
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. Design and construction of segmental concrete bridges for service life of 100 to 150 years steen rostam1 summary future demands for service life performance of concrete bridges pose multidisciplinary challenges on the designer and the contractor to master structural, materials, construction, and maintenance properties. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary. Analysis and design of reinforced concrete bridge structures. A sample analytical method for bearing resistance calculation. Prestressed concrete bridge girder design examples.
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