The behavior of box girder section for a general case of an eccentric load has been s tudied and presented its studies in chapter 2. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica. Title reinforced concrete slab design using the empirical method publication no. Bilal elariss first semester 20042005 objectives the objective of the project is. Design of prestressed concrete igirder bridge superstructure. The purpose of the thesis was to show the economical potential of using nonlinear analysis as a design method for bridge design. The steel box girder may have longitudinal stiffeners on flanges and webs and transverse. The 3d bridge models were realised by considering work breakdown structure and product breakdown structure to enable digital mockup and design enhancement and to shorten the learning time of construction engineers. Design guidelines for steel trapezoidal box girder systems. Substitution of cip conventional concrete in the contract document with shotcrete. The depth and width of the box girder are 7 and 20 ft 2. Bo x girder bridges are being made into use at many places.
Mccormick rankin corporation paper prepared for presentation at the bridges economical and social linkages session of the 2007 annual conference of the transportation association of canada. Analysis and design of prestressed concrete box girder bridge. Construction and load tests of a segmental precast box girder bridge model by s. Bss090119991 abstract this design example illustrates the empirical design method for composite concrete bridge decks specified in article 9. These new provisions have been structured to simplify their logic, organization and. Study of bridges with composite steelconcrete box girder. The benefit can, in most cases, be seen for slender and compressed concrete structures. Done by abeer abdullah amal alamiri ramla kalantar. In addition, the method is used for a comprehensive study of the behavior of these structures with geometrical configurations representing the majority of commonly built box girder bridges. Wsdot standard prestressed concrete girder types 579.
It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. Mar 27, 2019 attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge. Study of bridges with composite steelconcrete box girder decks. Pdf precast prestressed concrete adjacent box girder bridges are widely used in short and medium span bridges. Kansas department of transportation bridge construction manual version 1011 kdot bridge section 1. A box girder bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. The aim of this document is to relieve the practicing engineer of the need to study the mass of literature on the subject of concrete bridge construction so that he can devote time to the actual design process. Bridges with composite steel concrete box girder deck have been adopted in numerous cases.
It is a companion to a publication giving general guidance on composite highway bridge design. Elremaily construction technology laboratories, inc. Only the design of slab bridge will be used for illustration. Continuous prestressed concrete girder bridges volume 1. Design guidelines for steel trapezoidal box girder systems 6.
The torsional stiffness of a box section is generally in the range of. Concrete remains the most common material for bridge construction around the world, and prestressed concrete is frequently the material of choice. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. The application of genetic algorithms gas for a class of numerical examples is investigated. Leap bridge steel leap bridge steel is an integrated modeling, design, analysis, and loadrating software application for straight and curved i girder and tub girder steel bridges. Concrete structures chapter 5 wsdot bridge design manual m 2350.
Designers knew that as they increased the pier size, the box girder prestressing requirements would increase. It is assumed the bridge will be cast on falsework. Box girder bridge deck systems bim object definition from nbs. The advantage in using an allsteel configuration is that the whole cross section, including parapets, can be fabricated at the works for delivery and erection in complete spans. Patch loading and distortion of box girder decks cross section are identified and studied, and their analysis and design methodologies defined in the eurocodes are presented. The example and commentary are intended for use by designers who have knowledge of the requirements of aashto standard specifications for highway bridges or the aashtolrfd bridge design specifications and have designed at least one prestressed concrete girder bridge, including the bridge substructure. The manual is intended to fill a gap not covered by either the bridge design code or standard text books. Construction and load tests of a segmental precast box.
This website and documents are provided for use by persons outside of the kansas department of transportation as information only. Pci has developed preliminary design charts in accordance with the aashto. Prestressing force of the box girder is analyzed using the model and the results for the deformation, moment, shear and stresses are tabulated and plotted. 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 i girder bridge. Concrete bridge design, analysis software leap bridge. Load distribution in simply supported concrete box girder. Prestressed concrete continuous box girder bridge design. Reinforced concrete slab design using the empirical method. This design example was edited in 2012 by hdr engineering, inc. Department, sri vasavi institute of engineering and technology, andhra pradesh. 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. Next bridge beams 104k, pdf pci zone 6 curved spliced girders 1. The steel box girder may have longitudinal stiffeners on. A box girder typically comprises of items such as box girder units, connections and post tensioning cables.
Plan, elevation and section views are shown on the following pages. Precast options for bridge superstructure design john r. The models were also utilised for the fabrication of precast box segments and for the geometry control during construction. Measured behavior of a curved precast segmental concrete. Case 1 is just beside the support, case 2 is at midspan and case 3 is an artificial case with too. The design approach resembles the approach of a preliminary design. Comparison of the amount of reinforcement for a boxgirder. The two most common types of modern steel girder bridge are plate and box. Pdf structural bridge design chapter 7example of prestressed. Lrfdbased design optimization of steel box girder sections. These methodologies are then applied through a design case of a bridge with a composite box girder deck with typical spans of 63 m. Bridge design free download as powerpoint presentation. Reinforced concrete bridges concrete reinforcing steel.
This thesis presents a method for the complete determination of load distribution in simply supported concrete box girder highway bridges. Steel bridge tutorials computers and structures, inc. A design optimization problem for steel box girder sections is formulated and a numerical solution procedure is presented. Concrete boxgirder bridges structural engineering documents. A girder bridge is a bridge that uses girders as the means of supporting its deck.
In addition, the box girder design can have a shallower depth and use less material for a given span than the tbeam. The example problem is a three span continuous box girder bridge that is 700 ft. This manual is intended to better communicate the intent of the plans, standard specifications for state road. The bridge design code provides detail of design principles, loads and standards to which all bridges designed by, or for, mrwa must comply. Comprehensive design example for prestressed concrete. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The design of psc multicell box girder performance is found to be an economical design corresponding to critical bending moment and shear forces developed due to various load combinations as per irc specifications in comparison with the design of different span configuration using box girders with. Designforahighwaybridge tableofcontents chapter page i. Various studies have been performed so as to develop a more stable structure design by varying the shape of the bridge structure. University college of engineering graduation project ii. A box girder bridge also known as a box section bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. This bar will contribute to the overall resistance and will be accounted for in the calculations below. These include standard concrete cover and bar spacing dimensions, plus a variety of specific design and detailing instructions.
Superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Concrete boxgirder bridge model tutorials computers and. The box is typically rectangular or trapezoidal in crosssection. Construction and load tests of a segmental precast box girder. Design requirements for the network rail standard box girder bridge are given in documents available from network rail. Learn more openbridge modeler 3d parametric modeling software for bridges.
Posttensioned box girder bridge an analysis approach using. It gives two worked examples, one for a multi girder bridge and one for a ladder deck bridge. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Types and design methods of reinforced concrete bridges are presented. The box girder bridge also has greater rigidity in resisting torsion, which is an advantage for bridges that have curved. Analysis and design of prestressed box girder bridge by. Reference is made to simplified versions of the structural eurocodes for bridge design, which are available for student. The term girder is often used interchangeably with beam in reference to bridge design.
Then the 1,400ton, 103mlong box girder was lifted successfully from the yangtze river to its final place with strand jacks. If made of concrete, box girder bridges may be cast in place using falsework. Tech structural engineering, mandava institute of engineering and technology, andhra pradesh s. Pdf on apr 16, 2017, nabeel albayati and others published structural bridge design chapter 7example of prestressed concrete bridge2017 find, read. For example, steel plates are usually hot rolled, and cast steel may be used. Box girders are usually considered for footbridges only for spans over about 30m, and most box girder footbridges adopt an allsteel configuration. Attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge. In this paper, cost optimization approach of a posttensioned pc igirder bridge system is presented. Notes author staff bridgesight software sponsor bridgesight software. Concrete boxgirder bridge model tutorials computers. Design of a reinforcedconcrete deckgirder highway bridge. Although normally the box girder bridge is a form of beam bridge, box girders may also be used on cablestayed bridges and other forms. A box girder of a viaduct over the ayrton sena highway, in s. Based on observations made during construction, and on measurements taken of concrete strains, tendon strains, temperature distributions, and slopes, a series of detailed design, construction, and inspectionrelated recommendations are made.
Evaluation of prestressed concrete bridges under light. However, some authors define beam bridges slightly differently from girder bridges. Used in cip posttensioned concrete box girder construction, deep bridge. Leap bridge steel leap bridge steel is an integrated modeling, design, analysis, and loadrating software application for straight and curved igirder and tubgirder steel bridges. Analysis and design of prestressed box girder bridge by irc. This type of solution has the benefit of having great resistance relatively to its own weight, resulting from the optimization of steel and concrete properties. Mar 12, 2015 box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. Optimization of posttensioned box girder bridges with. Appendix b example problems transportation research board. Canadian precastprestressed concrete institute bob stofko, p. Box girder bridge deck systems bim object definition. To avoid this circular dilemma, only the end spansat 157 feet long, the longest in the new bridgewere posttensioned. Strut andtie model design example for hammerhead pier.
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. Results demonstrate that total construction cost is relatively insensitive to spantodepth ratio over the following ranges of ratios. The upper lefthand box in this screen contains a list of all aashto lrfd loads. Pdf design, detailing, and testing of nonposttensioned transverse.
Guidelines for design and construction of decked precast, prestressed concrete girder bridges final report prepared for national cooperative highway research program transportation research board national research council r. The first girder is internally prestressed, the second is externally prestressed. Design of reinforced concrete bridges department of civil. In addition, the method is used for a comprehensive study of the. Optimal design of a posttensioned box girder is achievable by correct selection of design variables. Twospan castinplace posttensioned concrete box girder bridge. Prestressed concrete decks are commonly used for bridges with spans between 25m and 450m and provide economic, durable and aesthetic solutions in most situations where bridges are needed. This example illustrates the design of a two span castinplace post tensioned concrete box girder bridge. Edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel i and box section flexural members within articles 6. The centerline of the bridge lies on a 400 ft radius and the crosssection is a two cell box. China electric power press continuous prestressed concrete box girder bridge design case study. A computer spreadsheet application was specifically developed for this investigation. Aashto lrfd bridge design specifications, fifth edition with 2011 interim revisions.
Edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel i and boxsection flexural members within articles 6. Web design of box girders concrete bridges sciencedirect. Bridge information models for construction of a concrete. The formulation is based on the load and resistance factor design lrfd procedure. It does not, however, cover the application of these principles. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. The guidance in this publication has been developed from earlier wellestablished guidance in a number of sci bridge design guides. Class 5000 or higher used in cip posttensioned concrete box girder construction, deep bridge foundations, or in other special structural applications if significant economy can be gained or structural requirements. Concrete bridge design, analysis software leap bridge concrete.
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