Analysis and design of plate girder and box girder test. Steel bridge design handbook fhwa us department of. Additionally, the weld design for the webtoflange joint of the plate girders is demonstrated along with all applicable components of the stiffener design and cross frame member design. Pdf this study concerns with finding the geometric dimensions of a. The resulting endplate design will be satisfactory for use in type 1 construction rigidframe as defined in one of the papers references or, with appropriate modifications, as an fr type. Plate girder design process cee462 steel structures ii. Lrfd design example for steel girder superstructure bridge.
The design output includes deflection, bending moment and shear force diagrams, and calcsheets with detailed calculations. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. Key words steel bridge, steel i girder, aashto lrfd, moment redistribution, cross frame design 18. Some authors examined the behavior and design of plate girder and also. Product information the double girder gantry cranes are manufactured by means of specifying the lifting capacity, right and left portals, measurement of distance between legs and underbridge height. It calculates the envelopes for all the required design forces inlcuding vertical loads and horizontal effects of the moving cranes, moments and deflections. The girderslab system and the open web dbeam girder technology are the result of more than fifteen years of research and development. Download structural analysis software riveted plate. The resulting end plate design will be satisfactory for use in type 1 construction rigidframe as defined in one of the papers references or, with appropriate modifications, as an fr type.
Cee462 steel structures ii summary of plate girder design process 1. Plate girders are used in both buildings and bridges. We wanted an interior structural steel girder to be placed within the plane of the precast slab units, thereby producing a thin floor construction akin to flatplate with a minimum floor to ceiling height. Calculates cumulative stresses at critical locations for loads applied to noncomposite and composite sections. The load effects such as bending moment and shear force are to be found using individual and unfactored load cases. The first task, analysis and design of horizontally curved plate girder and box girder test assemblies, is complete. In buildings, when large columnfree spaces are designed to be used as an assembly hall, for example, the plate girder is often the economical solution.
Personal pictures taken on field trip to twitchell creek bridge july 2009 5. The span is 36 m and carries two concentrated loads as shown in fig. Steel girder design example using 3rd edition aashto lrfd. Sep 25, 20 the files attached include a csibridge model and a detailed pdf which documents the modeling and verification procedures for a composite steelgirder bridge design based on the example published in the lrfd design example for steel girder superstructure bridge fhwa nhi04041 by fhwa in november 2003. However, it is a necessary and important part of plate girder design when applying the load and resistance factor design lrfd specification. Design verifications for simple steel plate girder bridges, consider spot checking computer program design and analysis output by rough hand calculations if practical for complicated steel plate girder bridges curved, consider verifying design with a second designanalysis program no two programs will match exactly of course. Download free excel spreadsheet design for steel structures. An example of application shows a good agreement with the developed formula. The following american association of state highway and transportation officials. A beginners guide to simple plate girder design to ec3 part 15. The transverse section and profile views of the sample bridge follow. To outline design procedures for longitudinally stiffened girders and for girders with large web openings.
Pdf the behaviour of plate girders under in plane loading has been. As the name suggests this design plate girder spreadsheet can design plate girders. Formula 5 may seem too complicated for design purposes. Distributed equally to each girder b s d i basic lrfd design live load hl93 article 3. An openstaad macro used to parametrically generate a concrete box girder outline consisting of plate elements. Steel plate girder bridge design using indian standard. 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. Structural steel design, fabrication, and construction. Plate girder literature af area of compression flange af as area of transverse stiffener as aw area of web aw a panel length measured from centerline to a centerline of transverse stiffener b width of comp. Select trial web size, h and t w based on depth restrictions, ht w limits, optimization guidelines, which is typically slender. The design examples provide coverage of all applicable limit states whether or not a.
These steel structures design spreadsheet are easy to use, but powerful steel structural designing excel software to make things easy. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. Design verifications for simple steel plate girder bridges, consider spot checking computer program design and analysis output by rough hand calculations if practical for complicated steel plate girder bridges curved, consider verifying design with a second design analysis program no two programs will match exactly of course. Generally an isection with a channel section is chosen, though an isection with a plate at the top flange may be used for light cranes. Thus, use of a hybrid girder requires an approved design waiver. Design to ec3 part 15 nanyang technological university. Design plate girder spreadsheet computerized civil engineer. Analysis and design of composite steelgirder bridge. Many numerical examples have been considered to well understand the. Curved plate girder design for safe and economical construction justify recommendations in preferred. Crane girder design 5 crane column cap plates allow girder end rotation avoid thick cap plates place the bolts outside of the column flanges.
Use is made of a computer program to compare the behaviour of. Structural pipe and tubing shall be galvanized inside and outside. Additionally, the weld design for the webtoflange joint of the plate girders is. Structural steel, in the form of rolled steel beams or welded plate girders. You can easily design any plate girder on the basis of these steps with a simple process of design by following our given steps in the pdf file provided below. In such cases, the designer must choose between a plate girder and a truss. Structural steel design, fabrication, and construction jamie f. This example illustrates the design of a twospan welded plate girder. The design may be based on any one of the following assumptions.
Enter the impact to be used for the entire bridge by clicking on impact in the tree and selecting fileopen from the menu. Diaphragms crossframes through girders the beam or girder is fully braced at a location if twist is prevented. 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. Distribution statement bridge design, steel girder, load and resistance factor this report is available to the public from the design, lrfd, concrete deck, bolted field splice, national technical information service in. Simple span plate girder example aashtoware bridge. Do not use knee braces allow for adjustment in placing the crane girder. Plate girders ii where, qe elastic critical shear strength values to be used in design for different values of ad and dt are tabulated in table 1. Plate girder for efficient design it is usual to choose a relatively deep girder, thus minimizing the required area of flanges for a given applied moment, msd.
Simplified optimum design of plate girder according to the obtained results, a design method is sugg ested to design optimally a plate girder for specified load, span, and to tal girder depth. The main theme is resistance to plate buckling and several other eurocodes refer to these rules, not only the bridge code. Plate girder design using lrfd american institute of. The attachment of non structural elements is the responsibility of the architect or designer, unless specifically shown otherwise. The virtisopis rating shall be shown on the bridge plans. Each example, in the set of examples, covers a different situation for which. Steel tutorial aashtoware bridge design and rating products. 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.
Plate girder shear and flexural strengthening design example. Introduction in 1993, the american association of state highway and transportation officials aashto adopted the load and resistance factor design lrfd specifications for bridge design. Section properties of a riveted plate girder to bd 5610 and bs54003. Lrfd 3rd edition threespan continuous straight igirder 1. Select girder system and the structure definition window will open. The design examples are arranged with lrfd and asd designs presented side by side, for consistency with the aisc manual. Design considerations for steel plate girder bridges. Riveted plate girder section properties of a riveted.
Plate girder design using lrfd, engineering journal, american institute of steel construction, vol. It is intended to be an aid in designing appropriate bridge strengthening retrofits. Design of plate girders 2 of welded plate girders in this book. Plate girder design using lrfd american institute of steel.
Additionally, the virtisopis file used for rating the bridge is to be sent to the nmdot bridge design bureau. Painted or galvanized astm a709 grade 50 shall be used for trusses. Sample owners quality assurance manual erection guide spec coating systems guide. When the gantry is not laterally supported, the equation to be used to select a trial section is as follows. Due to various restrictions on placing files in this manual onto the internet, portions of the. This bridge is the igirder design example presented in the appendix of the aashto guide specifications for horizontally curved steel girder highway bridges, 2003. Calculates cumulative stresses at critical locations for loads applied to. You can do the hard part of steel calculation in minutes with the inputs. Tmcp hps is available in plate thicknesses up to 2 inches and in.
An openstaad macro used to perform the design of a reinforced concrete beam per aci 31899 for a selected member in an analyzed. Torsional bracing of beams brace stiffness and strength requirements 6 aisc specification appendix 6 bracing provisions. A design example of the three span continuous composite plate girder bridge is given to illustrate the design procedure. You can do the hard part of steel calculation in minutes with the inputs and easy outputs. Interaction of the various components considers the design and detailing of the rail the girder, the horizontal girder or surge plate and columns and founda tions. Design guidelines for steel trapezoidal box girder systems. Pdf design of plate girders miftakhu zaim academia. Plate girder worked example 1 made by sssr date 150400 structural steel design project calculation sheet checked by pu date 250400 problem. For curved girders, use above and increase by 10 to 20 percent, or use lrfd equation 2. Dec, 2012 plate girder for efficient design it is usual to choose a relatively deep girder, thus minimizing the required area of flanges for a given applied moment, msd. E1 is fully restrained against lateral buckling throughout its span. Structural steel 1 of 18 rev plate girder design project. Comparing bs5950 with ec3 part 15 in plate girder design design of plate girder bs5950 most design rules found in sections 4.
For e, this difficulty is overcome by tabulating allowable stresses for different materials astm a7 a36, etc. To extend the coverage of plate girder design previously given in lectures 8. Cl stress modification coerficient depending on 01. For example, the allowable bending stress for steel with a. The first task, analysis and design of horizontally curved plate girder and. To include the design of transverse web stiffeners and end posts and consideration of patch loading. Key words steel bridge, steel igirder, aashto lrfd, moment redistribution, cross frame design 18. Steel bridge alliance or that of any person named herein that these data and suggested. Design with asd and lrfd are based on the same nominal strength for each element so that the only differences between the approaches are which set of load combinations from ascesei 710 are used for. November 16, 2015 july 1, 2016 rahul sheokand 2 comments design plate girder spreadsheet, plate girder design plate girders are most widely use steel structural elements after rolled section. Design of plate girder design of plate girder design principles design inputs span l, loadings, depth and width internal forces bmd and sfd bending resistance effective width method effective section area, a eff effect second moment of area, i eff elastic modulus w eff m y,rd modifiedflangesonly method.
Calculates noncomposite and composite for modular ratios n and 3n section properties for steel igirders with concrete deck. Stuchndarnubmoxamdqajntmt theoryofetnadjatfibution. A sample input file and selected excerpts from the corresponding output file are included in this document. Pdf plate girder parametric study with variations in. With these tables, it 1s a simple matter to find the allowable shear stress for a given girder geometry, or. The double girder gantry cranes having different hoisting capacities are manufactured in the standards which we have formed and in accordance with. All anchor bolt shall have plate wahers a minimum of 2x2x316 thick. Plate girder bridges details and design requirements. The files attached include a csibridge model and a detailed pdf which documents the modeling and verification procedures for a composite steelgirder bridge design based on the example published in the lrfd design example for steel girder superstructure bridge fhwa nhi04041 by fhwa in november 2003 recommended reading. Recent developments in optimum design methods allow direct design of girder bridges, considering minimisation of weightcost. 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.
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