Concrete box girder bridge design example pdf format

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. Steel bridge tutorials computers and structures, inc. Concrete bridge lrfd specifications parsons brinckerhoff page 1 1. Reinforced concrete deck supported on simple span prestressed girders. Standard adot 32inch fshape barriers will be used resulting in a bridge. Structures design office lrfd design examples files pdfs. Attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steel girder bridge, and a cablestayed bridge.

Appendix b example problems transportation research board. Analysis and design of prestressed box girder bridge by irc. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 549 sample calculations at 54 ft. The hollow box girder bridge is admirably suited to these conditions and has the additional advantage of its aesthetically pleasing lines, a highly desirably property for urban structures. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units. It includes some pdf documents containing explanatory examples and an overview of the strategic development of this structural code. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. Prestressed concrete psc girder superstructure bridge design example us units pdf version 1. Critical dimensions and loads are repeated here for ease of reference. Strength of concrete pacific nw aggregates have consistently resulted in concrete. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. 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. It was evident that the novel method developed in this research can effectively identify the prestress force in box girder bridges. Reinforced concrete deck supported on simple span prestressed girders made continuous for live load.

Only the design of slab bridge will be used for illustration. Bridges are the key elements in any road network use of box girder is gaining popularity in bridge engineering fraternity because of its better. Bc box girder, composite design bg box girder bm beam bn bin cb box culvert cs concrete slab ct cantilever dg deck t girder or orthotopic dt deck truss er earth fa filled spandrel arch fb rigid frame box fc girder floorbeam, composite design fg girder. Analysis and design of post tensioned box girder bridge. For a particular girder span and bridge width, the design. Impact of lrfd specifications on design of texas bridges. Their contributions, as well as the administrative and technical assistance from aci staff, are acknowledged. Pdf construction of precast segmental box girder bridge. Site location is assumed to be near socorro, new mexico, with the bridge.

Comprehensive design example for prestressed concrete girder. For instance 3100 reinforced concrete box girder bridges were designed and built in california. 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. 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.

Analysis and design of prestressed concrete box girder bridge. Pgsuper uses a stateoftheart iterative design algorithm and other iterative computational procedures. Self weight load diagram of 28m t beam bridge figure 3. Box girder bridges are common in the western world especially california scordelis, 1967. Cfcc prestressed precast concrete box beam with castinplace concrete slab grace et al. Concrete boxgirder bridge model tutorials computers. This earlier handbook format was a collection of design aids and illustrative examples, generated in the precalculator era. The first example is of multi girder form, the second is of ladderdeck form. 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. From girder end midspan of noncomposite beam girder. Design step 5 design of superstructure prestressed. This publication presents worked examples of the detailed design of two composite highway bridges. 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. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140.

This example illustrates the design of a single span castcastinplace posttensioned concrete box girder bridge. Design of deck reinforcement, including flexural resistance, limits of reinforcement, and control of cracking is based on aashto lrfd bridge design specifications 5. Twospan castinplace posttensioned concrete box girder bridge. Design guide for composite box girder bridges steelconstruction. Wisdot bridge manual chapter 19 prestressed concrete january 2020 197 19.

Analysis and design of prestressed concrete igirder bridge. Introduction this example illustrates new mexico department of transportation nmdot design procedures for a threespan prestressed concrete girder bridge. Design example 1 demonstrates design of the superstructure and bearings for a single span castinplace posttensioned concrete box girder bridge using lrfd. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m t girder all simply supported.

The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrication and installation. Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. Section a6 flexural resistance sample calculation from opis to compare with. Download free bridge design and analysis spreadsheets. A box girder bridge is an apparent bridge sector in which main beams contain girders in the hollow box shape. The box is typically rectangular or trapezoidal in crosssection. Wisdot bridge manual chapter 19 prestressed concrete. Reinforced concrete bridges theory and design of bridges. Link to scis composite bridge design p356 link to scis composite bridge worked example.

Design of reinforced concrete bridges department of civil. I i girders 2 1 beams 3 double ts 4 box beams 5 slab beams 6 decked slab beams 7 ll beams. The simple prestressed concrete box girder has evolved rapidly into the sophisticated bridge with many more design. Key words prestressed concrete, lrfd, design, bridge girders. These give extracts of the design relating to the features particular to the box girder form, together with a. 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. The following design method can be used for normal weight concrete. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Multimedia package for lrfd concrete bridge design rosa p. Rolling vehicle load as per irc 70r loading diagram of 28m psc beam bridge. Example bridge prestressed concrete bridge design example 2.

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 article presents highlights of the structures design and construction. Horizontally curved concrete box girder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage. Results show a good accuracy of the proposed method even with noisy measurements. Pdf analysis and design of prestressed concrete box. In addition to general design guidance and information on detailing practices, this section contains three design examples. Posttensioned box girder design manual now available. Bridges are the key elements in any road network use of box girder is gaining popularity in bridge. In the lrfd specification, the general equation for design is shown below. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. The box girder usually includes either structural steel, prestressed concrete or in the form of reinforced concrete. Comprehensive design example for prestressed concrete. The upper left hand box in this screen contains a list of all aashto lrfd loads.

Only the superstructure design of the two concrete alternates will be covered in this article. A design example followed by a load rating analysis illustrates the engineering computations performed by pgsuper. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. The use of segmental concrete box girder was chosen as the flexible system and appropriate. New road segmental bridge have been built near the city of zilina, aligned on european highway corridor. In this thesis analysis and design of prestressed concrete bridges deck slab, t girder and box girder are carried out using irc. Transverse design of adjacent precast prestressed concrete. Analysis and design of prestressed box girder bridge by.