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. The behavior of box girder section for a general case of an. Posttensioned box girder bridge an analysis approach. Design examples are presented in appendices to this manual. Design of box girder bridges free download as pdf file. Design of box girder bridges bending beam structure scribd. Design examples of seismic retrofits of normal bridges. This document is available to the public design example, steel bridge through the national technical information service, springfield, va 22161. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. 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. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Minor bridge bridge having a total length up to 60 meters. It may also be prefabricated in a fabrication yard, then transported and installed using cranes. Analysis and design of prestressed box girder bridge by irc.
A box girder bridge is one in which the principal structural element is one or more closed cells, acting in bending. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. Another method of box girder bridge construction is the incremental launching. This manual contains information related to the analysis and design of castin place concrete box girder bridges prestressed with post tensioning tendons. Ircsp, guidelines for the design of small bridges and culverts, indian road congress, india. The manual is targeted at federal, state and local transportation departments and private company personnel that may be involved in the analysis and design of this type of bridge.
The document has been prepared as a guide and thus much of the information is general in nature, representing the latest steel industry positions. Wisdot bridge manual chapter 24 steel girder structures july 2019 245 24. 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. Introduction box girders have become a prominent element in the con. June 1970, milford haven bridge over the river cleddau in the uk. Report date october 2002 steel trapezoidal box girder bridges 6. Title and subtitle a design procedure for intermediate external diaphragms on curved 5.
Design guide for composite box girder bridges steelconstruction. For medium span highway bridges, composite box girders offer an attractive. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. This manual contains information related to the analysis and design of castinplace concrete box girder bridges prestressed with posttensioning tendons. 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. 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. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal.
This design example tries to follow this outline as closely as is. Analysis and design of prestressed concrete box girder bridge. This document was modified from the original design manual for inclusion of lrfd material and general content by georgia. It includes some pdf documents containing explanatory examples and an overview of the strategic development of this structural code. This document is disseminated under the sponsorship of the u. Recommendations should not be considered as strict rules. For the latest information regarding the novel coronavirus covid19 please visit the california coronavirus covid19 response page. Girder bridges are the most natural and simplest form of bridging between two points. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. Appendix i design example integral steel boxbeam pier.
Report date steel bridge design handbook design example 4. Design of bridges excel sheets free download category. Numbering of tables and figures tables and figures shall be numbered using the chapter, section, subsection in which they are located, and then a hyphen followed by consecutive numbers. The proposed design in volves provision of posttensioned. Threespan continuous straight composite i girder load and resistance factor design third edition customary u.
Unfortunately, this book cant be printed from the openbook. After reading this article you will learn about the design of slab and girder bridges. Threespan december 2015 continuous straight composite steel tub girder bridge 6. Example b1 comprehensive example problem description the example problem is a three span continuous box girder bridge that is 700 ft. It gives two worked examples, one for a multi girder bridge and one for a ladder deck bridge. Use is made of a computer program to compare the behaviour of alternative girder support systems and the advantages and disadvantages of each is summarized. The bridges are designed and constructed adopting the following irc specifications. This report discusses the design and construction of spliced girder bridges. This research study analyzes the several positions in a box girder bridge where. This is indicative of the lod requirements for box girder bridge deck systems. In addition to general design guidance and information on detailing practices, this section contains three design examples.
The design and optimization of segmentally precast. Steel bridge tutorials computers and structures, inc. 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. Design of concrete structures shall be based on the requirements and guidance cited.
Buckling verifications at internal support p1 according to vi section 10, en 1993. Impact of lrfd specifications on design of texas 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. Design guidelines for steel trapezoidal box girder systems. Box girder bridges may be cast in place using falsework supports, removed after completion, or in sections in case of a segmental bridge. The purpose of this document is to illustrate how the pgsuper computer program performs its computations.
Please direct any questions on the content of this document to the bridge design section director, bridge division, texas department of transportation. Chapter 1 presents a brief history of the use of the bridge type and describes the basic components of a box girder superstructure. North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. 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. Pdf construction of precast segmental box girder bridge. Plan, elevation and section views are shown on the following pages. Prestressed concrete continuous box girder bridge design. The fhwa posttensioned box girder design manual was developed for engineers who have limited exposure to the design and construction of prestressed concrete bridges. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge. Design step 2 example bridge prestressed concrete bridge design example haunch depth 4 in. Pci bridge design manual 3rd edition, first release. This research study analyzes the several positions in a box girder bridge where the prestressed tendons can be added. Design of prestressed concrete igirder bridge superstructure.
All manual modifications must be approved by the bridge design engineer. Attached is a model file and a pdf which outlines the procedure for modeling a concrete box girder bridge, a steel girder bridge, and a cablestayed bridge. 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. Chances are very high that today, a bridge engineer will learn how to design a bridge girder before any other bridge type.
Wisdot bridge manual chapter 24 steel girder structures. It is assumed the bridge will be cast on falsework. Design and rating for curved steel i and boxgirder bridge structures c. Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica. 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. Each was subjected to a series of preliminary g before testing to failure under combined bending moment and torsion. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140. Box girder bridge design, engineering journal, american institute of steel construction, vol. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. Many of these earlier design aids intended to carry out relatively simple design calculations were eliminated in the sp1709 edition. 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. Abstract two large size cornposite box girder specimens were tested.
The design combines the performance require ments for a japanese bridge with the simplicity of american construction practices. The example bridge model, shown in figure 21, will be used throughout this chapter to help the user understand the various steps that are necessary to build a bridge model. These include standard concrete cover and bar spacing dimensions, plus a variety of specific design and detailing instructions. Construction of box girder bridges specifications, uses. Design and rating for curved steel i and box girder. Appendix b example problems transportation research board. Key words prestressed concrete, lrfd, design, bridge girders. Interaction between bending and shear at support p1.
However, the dead load for girder design shall not be less than 25% of a single barrier rail weight. For this steel girder design example, a plate girder will be designed for an hl93 live load. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. 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.
Detailed design examples for an aashto type iv girder and a texas u54 girder using both the aashto standard specifications and aashto lrfd specifications were also developed and compared. 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 use of bs 5400. Steel tub girder, steel box girder, lateral bracing. The design process and corresponding calculations for steel igirders are the focus of this example, with particular emphasis placed on illustration of the optional moment redistribution procedures. Bridge design manual, texas department of transportation august 2001.
Civil engineering to provide a passage over an obstacle like a water body, a valley, canal or a road structure is built across that obstacle to span a space and allow the easy movement of the concerned bodies over those obstacles, such a structure is named as bridge. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance. Box girder bridge design american institute of steel. The original bridge and structures design manual was created through the publicprivate partnership of the georgia department of transportation and the consulting engineering companies of georgia. Bharil, in innovative bridge design handbook, 2016. Design of a single cell rcc box girder bridge youtube.
Precast, prestressed girder design example pgsuper training 242020 1. Measured behavior of a curved precast segmental concrete. The use of girder as a natural bridging element is abundantly evident in nature, such as a fallen tree trunk over. Design theory, posttensioning analysis and details, segmenttosegment joint details and examples of recently constructed spliced girder bridges are given. Mar 19, 2014 click on a datetime to view the file as it appeared at that time.
Click onto the tutorial or example in the table below to connect to the relevant web page. Example project 2 1 chapter 2 create a concrete box girder bridge this chapter demonstrates the steps that are necessary to create a bridge model using csibridge. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. Multimedia package for lrfd concrete bridge design rosa p. 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. Concrete boxgirder bridge model tutorials computers. This publication is the second of two sci bridge design guides that reflect the rules in the eurocodes. Bridge design guide txdot january 2020 feedback for txdot policy on designing bridges, please refer to the txdot bridge design manual lrfd. It is a companion to a publication giving general guidance on composite highway bridge design. This report summarizes briefly the results of testing, with emphasis placed on behavior and mode of failure of the. Posttensioned box girder bridge an analysis approach using.
Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. Concrete boxgirder bridge model tutorials computers and. Steel bridge design had not been standardized each bridge was an original design that requires time and money, whereas concrete bridges are standardized designs the sssba developed standard simplespan and modular designs espan140 short span steel bridge design. Abstract a number of prestressed concrete i girder bridges built in the past several decades have demonstrated the ability of precast, prestressed spliced girder bridges to compete with structural steel plate girder bridges in the 120 ft 300 ft span. The example shows how both the vertical and horizontal deck geometrics affect the deck profile above the girders, and thereby affect the haunch depths. Bridge design manual, texas department of transportation. Box girders are used for highway bridges, railway bridges and footbridges different structural forms are chosen for each of these applications. If you need to print pages from this book, we recommend downloading it as a pdf. Title and subtitle design guidelines for steel trapezoidal box girder systems 6. 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. Steel tub girder, steel box girder, lateral bracing, no restrictions. Title and subtitle impact of lrfd specifications on design of texas bridges volume 2.
Bridge design manual, little additional documentation is required. Lrfd design of double composite box girder bridges purvik patel abstract conventional continuous steel bridges only exhibit composite behavior in the positive moment region. The primary goal of the collaboration is to achieve steel bridge design and. 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. 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. Jul 11, 2011 were summarized in addition to a design example in a new proposed document with mtd format to facilitate adoption of the new method by caltrans. Explanatory text was added to each chapter, while maintaining relevant design aids and illustrative examples. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation. Shear resistance of the stiffened web panel closest to the internal support p1.
This document is available to the public through the national technical information service, springfield, virginia 22161. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. A basic introduction to the design codes and methods of anlysis. This document consists of a comprehensive steel girder bridge design example, with instructional commentary based on the aashto lrfd bridge design specifications second edition, 1998, including interims for 1999 through 2002. Lrfd design example for steel girder superstructure bridge. Box girder bridge deck systems bim object definition from nbs. While the design examples consider box girders of constant depth.
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