Steel tutorial aashtoware bridge design and rating products. Dc1 loads applied to the noncomposite steel sec tion and dc2 and dw loads applied to the longterm composite 3n 24 section. This document is available to the public through the. 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. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140. Analysis and design of plate girder and box girder test. Prestressed concrete girders drafting and design presentation standards manual, transport and main roads, march 2018 1. The purpose of this document is to provide engineers with guidance on various issues related to the analysis of steel girder bridges. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 549 sample calculations at 54 ft. This lecture seeks to complete the discussion of plate girder design by considering further aspects of detailed design. Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. Two application examples are developed to demonstrate the design of continuous prestressed concrete spliced girder bridges for both shored and partially shored methods of construction. A typical example is, because of a previously determined large span between columns, to use higher concrete class in the design of columns, while following the uls and sls criterias, defined with.
Zahn what differentiates a beam from a plate girder. Final design chapters 7, 8, and 9 of the posttensioned box girder design manual focus on final design. Analysis and design of prestressed box girder bridge by. Department, sri vasavi institute of engineering and technology, andhra pradesh. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8.
Comparing bs5950 with ec3 part 15 in plate girder design design of plate girder bs5950 most design rules found in sections 4. Analysis and design of prestressed box girder bridge by irc. Design to ec3 part 15 nanyang technological university. Design example 37 b s d i lrfd negative moment loading article 3. The basic application of the aashto lrfd bridge design specifications to the design of straight steel isection flexural members is illustrated through this design example. A beginners guide to simple plate girder design to ec3 part 1 5. Characteristics design of gantry girder is a classic example of laterally unsupported beam.
A threespan bridge having a span configuration of 190240190 ft is considered for both examples. To design prestressed girders using line girder analysis. E1 is fully restrained against lateral buckling throughout its span. Structural steels steel bridges are fabricated and constructed with steel elements that are produced at two different types of steel mills. The examples were checked by mr d g brown sci and dr s j hicks formerly of sci. The gantry girder is designed on the assumption that either of the horizontal forces, transverse to the rails or along the rails, act the same time as the vertical loads including the impact load. Before you purchase the full report, you can view or download a fulllength sample in pdf format. The gantry girder is subjected to bending in vertical plane as well as in horizontal plane along with. So please help us by uploading 1 new document or like us to. Lrfd steel girder superstructure design example lrfd. American association of state highway and transportation officials. Tech structural engineering, mandava institute of engineering and technology, andhra pradesh s. 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. When you select a bridge in a model or proposal and start line girder analysis, infraworks will validate the initial rulesbased layout of your bridge girders and compare your designs against bridge design standards that you can choose from.
When you are ready, you can use your cloud credits to purchase detailed girder design documentation for a selected bridge. 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. The examples cover the principal steps in the verification of the. The required moment strength, mu pl or ma pl, for a 1in. A twospan bridge example is used here to illustrate the design steps in detail. For curved girders, flange width no less than 25% of the web depth for straight girders, flange width no less than 20% of the web depth. 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. The primary method of customizing and extending girder is via the development of plugins, the process of which is described in the plugin development section of this documentation. Design guidelines for steel trapezoidal box girder systems. 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. Varma in figure 4, my is the moment corresponding to first yield and mp is the plastic moment capacity of the crosssection. Description download steel crane girder design example. Title and subtitle impact of lrfd specifications on design of texas bridges volume 2. For example, the development of postbuckling action in a web plate, assumed in the previous lectures, can only occur when the elements at the boundary of that web plate are able to provide an adequate anchorage for the.
In the preliminary design of this example a lumpsum procedure was used to account for the timedependent 118 effects. This publication presents worked examples of the detailed design of two composite highway bridges. Plate girder worked example 1 made by sssr date 150400 structural steel design project calculation sheet checked by pu date 250400 problem. A beginners guide to simple plate girder design to ec3 part 15. Do not check this box if some of the structures making up the bridge are not in the database. The document is intended only to be a guideline, and only offers suggestions, insights, and recommendations but few, if any, rules. Appendix i design example integral steel boxbeam pier. For example, the aisc manual includes a table of beam shear, moment, deflection, and. Guidelines for computer modeling of posttensioned box girders are presented in this chapter. The first example is of multi girder form, the second is of ladderdeck form.
Appendix b example problems transportation research board. View initial results incanvas or purchase detailed girder design documentation in pdf format using cloud credits this will also generate a model that can be opened in autodesk structural bridge design. Plate girder design using lrfd university of maryland. Pdf steel crane girder design example free download pdf. Analysis and design of composite steelgirder bridge tutorials. The span is 36 m and carries two concentrated loads as shown in fig. With these tables, it 1s a simple matter to find the allowable shear stress for a given girder geometry, or. Page ix figure 417 applied stress varying in time 445 figure 418 stress related strain as a function of time 445 figure 419 example of change of girder concrete stresses between transfer and erection 448 figure 420 example of change of deflected shape between transfer and erection 448.
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. Nu girder bridge design and detailing manual open government. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. Plate girder design using lrfd, engineering journal, american institute of steel construction, vol. Title and subtitle design guidelines for steel trapezoidal box girder systems 6. Steel tutorial stl1 simple span plate girder example. Structural steel design, fabrication, and construction. Formula 5 may seem too complicated for design purposes. Longitudinal superstructure analysis and design are addressed in chapter 7. 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.
Buckling, bending, building engineering, engineering, structural engineering report this link. Aashto guide specifications for horizontally curved steel. This document is a standard developed by the aashtonsba steel bridge collaboration. Four span simply supported steel plate girder input. Plate girder design using lrfd american institute of steel. Introduction to the design of wood trusses by derek l. Examples to eurocode steel design to en 1993 bs en page.
These structures detailing manual examples are provided in pdf documents. The nu girder bridge design and detailing manual documents current best practices for nu girder bridge designs in alberta. Design to ec3 part 1 5 nanyang technological university. 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.
The tributary area for a girder truss is half the sum of all the tributary areas of the supported trusses plus half the area to the next truss. Title and subtitle impact of overhang construction on girder design 5. Structural steel design, fabrication, and construction jamie f. Postbuckling and tension field action are introduced and the roles of the main components in a plate girder identified. Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. In addition to the examples that demonstrate the use of the aisc manual tables, design examples are provided for. For a complete glossary of terms refer chapter 1 introduction. Design procedure prestressing reinforcement except for the determination of the governing live load plus impact moment, the design of the prestressing reinforcement for. The first task, analysis and design of horizontally curved plate girder and box girder test assemblies, is complete. Analysis and design of composite steelgirder bridge. Plugins can, for example, add new rest routes, modify or remove existing ones, serve up a different web application from the server root, hook into model lifecycle.
Cloud credits are charged only for the full girder design documentation provided in pdf format. If capacity of crane is moderate, the gantry girders rest on brackets connected to roof column of industrial shed. The general basis of plate girder design is discussed in a simplified way as a prelude to a more detailed presentation in lectures 8. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. Precast, prestressed girder design example pgsuper training 242020 1. The assumptions and limitations of the vload method are documented in this report along with. Design guide 1, 2nd edition base plate and anchor rod design 61 anchor rods are placed at a 12in. Design of prestressed concrete girder bridge request pdf. Check the box if the specified bridge is completely defined within the virtisopis database. Superstructure live load reactions for substructure design.
Horizontally curved concrete boxgirder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage analysis 1. The companion consists of design examples in parts i, ii and iii. 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. Aashto guide specifications for horizontally curved steel girder highway bridges, 2003. The ratio of mp to my is called as the shape factor f for the section. Design of prestressed concrete igirder bridge superstructure. 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. In addition, a design example for a twospan plate girder superstructure is included.
Steel girder design example using 3rd edition aashto lrfd. Structural steel 1 of 18 rev plate girder design project. It is the purpose of this report to endeavour to bring together the various standard procedures along with many rules and guidelines. Design of steel girders with diagram your article library. Abstract in this paper two important issues related to stability problems of stiffeners in plate and. For e, this difficulty is overcome by tabulating allowable stresses for different materials astm a7 a36, etc. Keywords box girder, optimization, bending stress, stru ctural analysis, finite element analysis. 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 first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci committee 340, design. The design examples provide coverage of all applicable limit states, whether or not a particular limit state controls the design of the member or connection.
The data are taken from the design data section and loads section of this document. Design step 5 design of superstructure prestressed concrete. The examples were prepared by miss m e brettle sci and mr a l smith sci. This design example was edited in 2012 by hdr engineering, inc. For this steel girder design example, a plate girder will be designed for an hl93 live load. After reading this article you will learn about the design of steel girders with the help of diagrams. Department of transportation kdot is moving towards adoption of nu girder sections for inhouse projects, in addition to the consultant projects where they are already being used, there is a need for similar design aids to allow for selection of nu girders conforming to design specifications. Design of posttensioned girder anchorage zones june 1981 6. Introduction the specifications of overhead cranes cannot be standardized as the requirements of each firm depends on various factors. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140.
Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder. It provides a number of short examples, in the form of calculation sheets, illustrating the design of structural open section members and simple connections in buildings. Introduction box girders have become a prominent element in the con. The manual focuses on the design and detailing of nu girder bridges. Structures design office structures detailing manual examples. About this design example description this document provides guidance for the design of cfcc prestressed precast concrete beams according to aash to lrfd bridge design specifications with the neccessary ammendmets where applicable, based on av ailable literature and ex perimental data from tests conducted by grace et. From girder end midspan of noncomposite beam girder top stress. Steel tub girder, steel box girder, lateral bracing. For this design example, a conventional line girder analysis program was used to determine dead load forces and reactions. Wassef christopher smith kevin johns modjeski and masters, inc. Authors seongyeong yang, todd helwig, rich klingner, michael.
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