When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge. It is assumed the bridge will be cast on falsework. Box girder bridge design, engineering journal, american institute of steel construction, vol. Design in accordance with the aashto lrfd bridge design specification, eighth edition, 2017 and the wsdot bridge design manual load rate in accordance with aashto, the manual for bridge evaluation, second edition, 2011. This design example was edited in 2012 by hdr engineering, inc.
An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Pdf optimization of box type girder of overhead crane. Prestressed concrete continuous box girder bridge design. Using of softwares for the design of bridges is much better than the manual procedure. For this steel girder design example, a plate girder will be designed for an hl93 live load. An overview of the design and erection issues is presented, particularly those dealing with thin.
This design is particularly suited to piecemeal crane erection. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. Design of concrete structures shall be based on the requirements and guidance cited. In addition to general design guidance and information on detailing practices, this section contains three design examples. Chapter 1 presents a brief history of the use of the bridge type and describes the basic components of a box girder superstructure. The network rail standard box girder type bridge that covers a span range from 21m to 39m uses trapezoidal box girders with a transverse ribbed steel deck spanning between notionally pinjointed shear plate connections.
The grandmere bridge, a 285 m 935 ft long castinplace segmental box girder bridge, experienced some distress which required strengthening by adding external prestressing equivalent to 30% of. Mar 19, 2014 click on a datetime to view the file as it appeared at that time. The design and optimization of segmentally precast. This paper discusses the coordinated design research program conducted under the sponsorship of the united states steel corporation, on the subject of steel box girder bridges. Computerised design of boxgirder bridge using balanced. The proposed design in volves provision of posttensioned.
Double girder box girder over head cranes are used for heavy duty applications in the industry. This example illustrates the flexural design of a section in positive flexure, the flexural design of a section in negative flexure, the shear design of the web, the evaluation of. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. Box girder bridge deck systems bim object definition from nbs. Overview of reinforcedconcrete boxgirder bridgedesign capability. Transverse design of adjacent precast prestressed concrete. The formulation is based on the load and resistance factor design lrfd procedure. Optimization of posttensioned box girder bridges with. While the design examples consider box girders of constant depth. Lrfd design of double composite box girder bridges purvik patel abstract conventional continuous steel bridges only exhibit composite behavior in the positive moment region. A box girder bridge is an apparent bridge sector in which main beams contain girders in the hollow box shape. Investigation into the project revealed numerous issues in the bridge s design and construction.
The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica. The fhwa posttensioned box girder design manual was developed for engineers who have limited exposure to the design and construction of prestressed concrete bridges. 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. Design of prestressed concrete igirder bridge superstructure.
Appendix b example problems transportation research board. Jun 15, 20 the authors have established a more accurate thinwalled beam theory of box girder, and, as an extension of the thinwalled beam theory, developed a theory of bending and torsion of the truss bridge. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Although normally the box girder bridge is a form of beam bridge, box girders may also be used on cablestayed bridges and other forms. It provides advice, for those already acquainted with the design of composite ibeam bridges, on the particular aspects of box girders bridge design and the. Design and rating for curved steel i and boxgirder bridge structures c. One of the example problems is based on the box girder bridge erected over the intracoastal waterway at corpus christi, texas, and is essen tially a documentation of the preliminary design procedure used in devel opment of the structure. 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. The west gate bridge is one of a number of box girder bridges built during the mid 20th century, and was one of four to fail in a three year period. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Analysis and design of prestressed box girder bridge by irc. Posttensioned box girder bridge an analysis approach. This publication is the second of two sci bridge design guides that reflect the rules in the eurocodes. In this paper a detailed parametric design optimization of the main girder of box type is performed.
Diaphragms in single and doublecell box girder bridges with. Analysis of box girder and truss bridges civil engineering. Similar composite action may also be achieved in the negative moment region by casting a bottom concrete slab between the points of inflection. This design example demonstrates the design of a tangent threespan continuous composite tub girder bridge with a span arrangement of 187. The application of genetic algorithms gas for a class of numerical examples is investigated. Therefore, the purpose of this paper is to present information relative to the design criteria in addition to information on pre liminary plate sizes, design aids, and computeraided design of steel box girder bridges. Many practical examples have been analyzed, and from these results, conclusions valuable to design practice have been deducted.
So through this project, we are analyzed the structural behavior of post tensioned box girder bridge using the recently developed software called csi bridge version 2015. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. This video contains transverse and longitudinal analysis of a single cell box girder bridge to determine design moment and shear for manual calculation of flexural and shear reinforcement of the. These include standard concrete cover and bar spacing dimensions, plus a variety of specific design and detailing instructions. Example b1 comprehensive example problem description the example problem is a three span continuous box girder bridge that is 700 ft. Lessons learned in the design and erection of box girder. Analysis and design of post tensioned box girder bridge. Cantilever construction method is adopted and considered in design box girder bridge using balance cantilever method. Effect of transverse stiffene box girder bridge examples in singlecell and doublecell studied by using finite element method of analysis. Finally, an example of the analysis of a bridge composed of a continuousspan, posttensioned concrete box girder superstructure and a concrete pier is also demonstrated using.
This list is intended to help identify a particular early form of lattice girder bridge which was popular with bridge engineers particularly in the united kingdom in the latter half of the 19th century. Lrfdbased design optimization of steel box girder sections. Lrfd design examples federal highway administration. Plan, elevation and section views are shown on the following pages. Color logos black only logos reverse logos bridge design manual 3rd edition, first release, november 2011 mnl311 1st edition, first printing, 1997 2nd edition, first printing, 2003. The box girder usually includes either structural steel, prestressed concrete or in the form of reinforced concrete or composite section. Box girder bridge design american institute of steel. Design of a single cell rcc box girder bridge youtube. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020.
It is a companion to a publication giving general guidance on composite highway bridge design. Introduction box girders have become a prominent element in the con. List of lattice girder bridges in the united kingdom wikipedia. 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.
Steel bridge tutorials computers and structures, inc. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. 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. Design and rating for curved steel i and box girder. Foreword to first edition this guide is the fourth in a series of complementary design guides for composite highway bridges. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. This is indicative of the lod requirements for box girder bridge deck systems. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. It gives two worked examples, one for a multi girder bridge and one for a ladder deck bridge. A computer spreadsheet application was specifically developed for this investigation. The steel girder design criteria are obtained from figures 31 through 33 shown below, from the concrete deck design example, and from the referenced articles and tables in the aashto lrfd bridge design specifications through 2002 interims.
Pdf construction of precast segmental box girder bridge. Analysis and design of prestressed concrete box girder bridge. Balaji rao by ruthvind roy shiva reddy ahad according to the alignment as straight or skew bridges. The spreadsheet focus on design of prestressing cable for box girder bridge using balanced cantilever method. Solid diaphragms, and frames of beams introduced at difference cross sections and their effects on behavior of box girder studied and recommendations for bridge design provided. Pci bridge design manual 3rd edition, first release. 0 specifically, the example illustrates the design of selected critical sections from an exterior girder at the. The behavior of box girder section for a general case of an. The box is typically rectangular or trapezoidal in crosssection. Finally, an example of the analysis of a bridge composed of a continuousspan, posttensioned concrete box girder superstructure and a concrete pier is also demonstrated using the approximate equivalent load method.
Concrete boxgirder bridge design per aashto lrfd 2007. Shape of the girder bridge according to the loadings, the road bridges and culverts as irc class a, class aa. North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. Design guidelines for steel trapezoidal box girder systems. Measured behavior of a curved precast segmental concrete. The steel box girder may have longitudinal stiffeners on flanges and webs and transverse. Lrfd steel girder superstructure design example lrfd. A design optimization problem for steel box girder sections is formulated and a numerical solution procedure is presented. Manufacturer product data template complete this electronic spreadsheet to ensure that your box girder bridge deck systems product information meets the requirements of level 2 bim. The design combines the performance require ments for a japanese bridge with the simplicity of american construction practices. Posttensioned box girder bridge an analysis approach using. Design transportation engineering resources bridge design. The term lattice girder, is used in the uk and lattice truss is more widely used in the usa. Optimal design of a posttensioned box girder is achievable by correct selection of design variables.
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