Design specifications and commentary for horizontally curved concrete boxgirder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage analysis 1. A girder bridge is a bridge that uses girders as the means of supporting its deck. The design of the kanawha river bridge in west virginia is used to illustrate these topics. Optimization of posttensioned box girder bridges with. The steel box girder may have longitudinal stiffeners on flanges and webs and transverse. Progressive erection applied to box girder with strutted wing slab koji osada1, taketo kanamoto 1, kimito saito2, takahiro arai 2 1 introduction the uchimaki viaduct is a multispan continuous box girder bridge with strutted wing slabs photo 11. Study of bridges with composite steelconcrete box girder. Using a truss to stabilize the top and bottom flange for lateral loads detail to avoid creating inadvertent continuity in adjacent spans consider bending in the angles due to relative vertical movement. 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. Design specifications there are at present a set of standard specifications,1 which pertain to straight box girders for highway bridges. The method is also capable of dealing with different material.
Lin international, will have a 760foot main span, the longest concrete box girder span in the united states, and a total length of 2,975 ft. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. Measured behavior of a curved precast segmental concrete. Structural analysis and response of curved prestressed concrete box girder bridges deepak choudhury and alex c. This design example demonstrates the design of a tangent threespan continuous composite tub girder bridge with a span arrangement of 187. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. Progressive erection applied to box girder with strutted. Continental steel public seminar, 6 august 2014, ntu design of plate girder design of plate girder shear resistance if the web is stocky, no shear buckling of web shall occur and the shear strength of the web is given by ec3 part 11 if the web is not stocky, shear buckling governs the failure. The design and optimization of segmentally precast. Longitudinal analysis of steelconcrete composite box. This manual contains information related to the analysis and design of castin place concrete box girder bridges prestressed with post tensioning tendons. Chiaki nagao 1 yasushi kamihigashi2 akio kasuga 3 kenichi nakatsumi4 abstract the gunkaigawa bridge is a. Analysis of posttensioned concrete boxgirder bridges diva.
The torsional properties of the closed section are often advantageous in reducing and simplifying the support arrangements and are particularly useful when curvature in plan is required. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. Design of boxgirder bridge using balance cantilever method are complicated due to many factor have to be consider including section of boxgirder, method of construction, loading during construction, traffic load and arrangement of the cable. Drawing labels, details, and other text information extracted from the cad file. This is a bridge design drawing using 4 cells box girder normally reinforced. 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. Longitudinal analysis of steelconcrete composite box girder. Used in cip posttensioned concrete box girder construction, deep bridge. The cross section of the element is a rec tangular singlecell box with side cantilevers. When designing a bridge it is of high importance that the geometry for the cross section is optimized for the structure. Comparing bs5950 with ec3 part 15 in plate girder design design of plate girder bs5950 most design rules found in sections 4. The frequency of use of steel box girders has increased in the state of texas and throughout the united states over the past 10 years.
The modern trend is to build box girder bridges with only one wide cell, which leads to a considerable increase in the transverse bending moment. Design to ec3 part 15 nanyang technological university. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. The two most common types of modern steel girder bridges are plate and box. 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. Prestressed tendons system in a box girder bridge 7. A beginners guide to simple plate girder design to ec3 part 15. 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. Proposed design specifications for steel box girder bridges. Pdf analysis and design of multi cell posttensioned psc. Balaji rao by ruthvind roy shiva reddy ahad according to the alignment as straight or skew bridges. Design of prestressed concrete igirder bridge superstructure. In the present work, analysis and design of box girder has been done, consideringtwo different sheathing pipes namely hdpe and corrugated bright metal pipes.
It is erected progressively by assembling divided parts of the cross section. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. Lrfdbased design optimization of steel box girder sections. Introduction box girders have become a prominent element in the con. Lrfd design of double composite box girder bridges purvik patel abstract conventional continuous steel bridges only exhibit composite behavior in the positive moment region. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge.
The purpose of this paper is to introduce a new design approach for the uls of that combination and also the uls due to fatigue, which is an important tool for the design of those bridges. The box girder normally comprises either prestressed. Appendix b example problems transportation research board. A box girder bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. Comprehensive design example for prestressed concrete. The application of genetic algorithms gas for a class of numerical examples is investigated. Composite box girder construction offers an attractive and economic form of construction for medium span highway bridges. Box girder section concrete bridges dwg section for autocad. The present work is developed around two alternative methods for the longitudinal analysis of steelconcrete composite box girder decks that preserve the structural significance of each main type of cross. This manual contains information related to the analysis and design of castinplace concrete box girder bridges prestressed with post tensioning tendons. These sheathing pipes have been used to find the economic solution of design of multicell. Proposed design specifications for steel box girder. Computerised design of boxgirder bridge using balanced. Design guidelines for steel trapezoidal box girder systems.
Study of bridges with composite steelconcrete box girder decks. Accelerated bridge construction techniques for replacement would not work well due to the continuous superstructure and congested surroundings. Box girders require more complex analysis and design than simple ibeams. V12 and higher design checks available through the bridge. Stanford libraries official online search tool for books, media, journals, databases, government documents and more. Canadian precastprestressed concrete institute bob stofko, p. Design of medium span highway bridge system requires careful selection of structural element. Analysis and design of prestressed box girder bridge by.
Boundary conditions considering crane parked at one position and lifting the load is the usual recommendation for crane operation. Posttensioned box girder bridge an analysis approach using. This publication provides guidance on the design of composite box girder bridges. 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.
For this steel girder design example, a plate girder will be designed for an hl93 live load. Shape of the girder bridge according to the loadings, the road bridges and culverts as irc class a, class aa. Results demonstrate that total construction cost is relatively insensitive to spantodepth ratio over the following ranges of ratios. Precast options for bridge superstructure design john r. An intricate geometry such as that of composite box girder bridges can be facilely modelled using the fe technique. The advantage of the box girder is that it possesses greater loading capabilities and is able to span longer bridge distances. Design guide for composite box girder bridges steelconstruction. The box is typically rectangular or trapezoidal in crosssection. Posttensioned box girder bridge an analysis approach. 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. Twospan castinplace posttensioned concrete box girder bridge.
Web design of box girders concrete bridges sciencedirect. Optimal design of a posttensioned box girder is achievable by correct selection of design variables. Boxgirder bridge with edge beams supporting the deck. Optimal design of a posttensioned box girder is achievable by. 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. Posttensioned box girder bridge can be eliminated in continuousspan, castinplace box girders by utilizing monolithic connections between the bridge superstructures and the piers, which in turn eliminate the bearing assemblies maintenance problems. For a particular girder span and bridge width, a large number of parameters control the design of the bridge such as girder spacing, cross sectional dimensions of girder, deck slab thickness, number of strands per tendon, number of tendons, deck slab reinforcement, configuration of tendons, anchorage system, prestress losses, concrete. Steel tub girder, steel box girder, lateral bracing.
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. Wassef christopher smith kevin johns modjeski and masters, inc. This example illustrates the design of a two span castinplace posttensioned concrete box girder bridge. Structural analysis and response of curved prestressed. A design optimization problem for steel box girder sections is formulated and a numerical solution procedure is presented. Aesthetic considerations were of high importance in choosing the final design for the new bridge. Arch, cablestayed, and suspension alternatives were considered, but ultimately, a continuous single box girder design consisting of seven spans was selected for its compatibility with the existing bridge. Design of concrete structures shall be based on the requirements and guidance cited herein and in the current aashto lrfd bridge design specifications lrfd, aashto. Overview of reinforcedconcrete boxgirder bridgedesign capability. Boundary conditions considering crane parked at one position and lifting. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. Guide specifications2 are also being used for curved box structures.
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. Steel bridge tutorials computers and structures, inc. Curved composite box girder bridges are generally comprised of one or more steel ugirders attached to a concrete deck through shear connectors. A curved nonprlsmatk thinwalled box beam element is used to model the bridges. The bridging activity is as old as human civilization. Aashtolrfd design example horizontally curved steel box girder bridge final report prepared for national cooperative highway research program transportation research board national research council john m. This paper describes the bridge type selection process, preliminary and detailed design procedures, unique structural details and construction and steel erection for four complex curved single steel box girder bridges completed within the groundside component of the terminal development project at. 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. Lrfd steel girder superstructure design example lrfd. Box girder section concrete bridges dwg section for. Similar composite action may also be achieved in the negative moment region by casting a bottom concrete slab between the points of inflection. Proceedings of an international conference held on 14 february 1973. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Concrete boxgirder bridge design per aashto lrfd 2007.
730 649 476 24 488 776 421 904 593 934 1411 427 326 1499 1254 1400 525 742 295 385 552 81 1312 171 940 585 430 921 1406 875 723