Design guide for composite box girder bridges steelconstruction. T or igirder bridges are the most common example under this and width of the rib in the case of t, i and l beams design of reinforcement in box girder bridge concrete tbeam bridge design free download as pdf file. Lrfd design example for steel girder superstructure bridge us. Texas u54 girder using both the aashto standard specifications and aashto lrfd specifications were also developed and compared. It gives two worked examples, one for a multigirder bridge and one for a. Enter the appropriate values as shown and click ok to save the data to memory and close the window. Girder bridges are the most natural and simplest form of bridging between two points. Pdf lrfd design example for steel girder superstructure. Comparative study of rcc t girder bridge design using different codes. Customized solutions book is provided pdf standard design and details of short span steel bridges solutions rolled beam recommendations. After reading this article you will learn about the design of slab and girder bridges. Short span steel bridge alliance west virginia local technical assistance program. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8.
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. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. These include standard concrete cover and bar spacing dimensions, plus a variety of specific design and detailing instructions. 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. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140.
Design of deck reinforcement, including flexural resistance, limits of reinforcement, and control of cracking is based on aashto lrfd bridge design specifications 5. A sample analytical method for bearing resistance calculation. This publication is the second of two sci bridge design guides that reflect the rules in the. Wisdot bridge manual chapter 24 steel girder structures. Saves the bridge description in this window and its tabs to memory and closes the window. I270 bridge over chain of rocks canal introduction i270 is a fourlane interstate expressway that serves as a north bypass to the city of st. Crane girder design girder lacing 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. Analysis and design of prestressed box girder bridge by. 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.
Threespan continuous straight composite steel i girder bridge 5. Introduction a girder bridge can be defined as a crossing the road. Steel girder design example using 3rd edition aashto lrfd. Design of prestressed concrete girder bridge request pdf. The transverse section and profile views of the sample bridge follow. It gives two worked examples, one for a multi girder bridge and one for a ladder deck bridge. Key words igirder, curved bridge, lifting, erection, construction 18. Worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010. The paper presented herein deals with the analysis and design of tbeam bridge super structure using limit state method of design irrespective of conventional working stress method of design. Pdf comparative study of rcc t girder bridge design. Lrfd steel design ohio department of transportation. The design process and corresponding calculations for steel i girders are the focus of this example, with particular emphasis placed on illustration of the optional moment redistribution procedures. Key words prestressed concrete, lrfd, design, bridge girders, u54 girder, type iv girder, type c girder, parametric study 18. Indian standard code is followed and basically the design.
Pci bridge design manual 3rd edition, first release. 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. Deck design follows the nmdot standard deck slab detail in chapter 4 of the nmdot bridge procedures and design guide, hereinafter referred to as design guide. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 547 design step 5. I270 carries a significant number of daily commuters between illinois and missouri with an average. 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. Ii, chapter 1a highway structures design handbook, published by american iron and steel institute in cooperation with hdr engineering. A design example followed by a load rating analysis illustrates the engineering computations performed by pgsuper. Two span plate girder example aashtoware bridge design.
Wisdot bridge manual chapter 24 steel girder structures july 2019 245 24. Pci has developed preliminary design charts in accordance with the aashto. Foreword to first edition this guide is the fourth in a series of complementary design guides for composite highway bridges. Bharil, in innovative bridge design handbook, 2016. Simplified inelastic design of steel igirder bridges, asce journal of bridge engineering, mayjune vol. Girder analysis and design is performed using the computer program conspan, version 09.
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. Figure 3 example of detailed chart using strength design method. Design guidelines for steel trapezoidal box girder systems 6. Interpolation between the two girder spacings is allowed.
Precast prestressed concrete igirder bridges have become the most dominate bridge. 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. The following design method can be used for normal weight concrete with specified compressive strengths up to 15. Design of a single cell rcc box girder bridge youtube. In the preliminary design of this example a lumpsum procedure was used to account for the timedependent 118 effects. It is a companion to a publication giving general guidance on composite highway bridge design. Analysis and design of prestressed concrete i girder bridge. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 47 table sa4.
Comprehensive design example for prestressed concrete girder. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140. Analysis and design of prestressed box girder bridge by irc. Section a6 flexural resistance sample calculation from opis to compare with. All manual modifications must be approved by the bridge design. It gives two worked examples, one for a multigirder bridge and one for a ladder deck bridge. Impact of lrfd specifications on design of texas bridges. Zahn what differentiates a beam from a plate girder. May 12, 2015 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. Plate girder design using lrfd university of maryland. Design and construction of spliced 1girder bridges. Prestressed box girders and general prestressed concrete guidelines are also included in this chapter.
Pgsuper models the various construction stages with. However, it is a necessary and important part of plate girder design when applying the load. The primary goal of the collaboration is to achieve steel bridge design and construction of the highest quality and value through standardization of the design, fabrication, and erection processes. Wisdot bridge manual chapter 19 prestressed concrete. Wisdot bridge manual chapter 19 prestressed concrete january 2020 193 19.
Design and load rate the first interior girder girder b. 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. Design guidelines for steel trapezoidal box girder systems. 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. In this case analysis is done using staad pro software.
Threespan continuous straight composite steel igirder bridge 5. A twospan bridge example is used here to illustrate the design steps in detail. Design of reinforced concrete bridges department of civil. Double tee bridge beams 157k, pdf next bridge beams 104k, pdf pci zone 6 curved spliced girders 1. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. 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. Pgsuper uses a stateoftheart iterative design algorithm and other iterative computational procedures. Design step 2 example bridge prestressed concrete bridge design example haunch depth 4 in.
Transverse design of adjacent precast prestressed concrete. The proposed design in volves provision of posttensioned. The use of girder as a natural bridging element is abundantly evident in nature, such as a fallen tree trunk over. During project work considerable efforts have been endured upon analysis and design of prestressed concrete girder bridge. Pgsuper models the various construction stages with construction events. 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. A twospan continuous composite igirder bridge has two equal spans of 165 and a 42 deck width. Design step 5 design of superstructure prestressed. Thesis pdf available april 20 with 10,563 reads how we measure reads. 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. The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation. Four lrfd design examples of steel highway bridges, vol. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge.
The example illustrates the design of a typical threespan continuous straight steel igirder bridge with. The continuous composite deck is made up of two steel girders with i. In these cases, straight steel box girders are used in regions where the. The design combines the performance require ments for a japanese bridge with the simplicity of american construction practices. Design considerations for steel plate girder bridges. Chances are very high that today, a bridge engineer will learn how to design a bridge girder before any other bridge type. This publication is the second of two sci bridge design guides that reflect the rules in the eurocodes. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. In this project work the prestressed concrete girder bridge, already. This design example was edited in 2012 by hdr engineering, inc. Only the design of slab bridge will be used for illustration.
Design step 5 design of superstructure prestressed concrete. This example illustrates the design of a two span precast prestressed igirder bridge. The behavior of box girder section for a general case of an. Lrfd design example for steel girder superstructure bridge us units. Key words i girder, curved bridge, lifting, erection, construction 18. Design example sample plate girder homogeneous elevation. Reinforced concrete deck supported on simple span prestressed girders made continuous for live. Routes, part of the design manual for roads and bridges. Abstract the purpose of this example is to illustrate the use of the aashto lrfd bridge design for. Bridge design guide 32 txdot january 2020 section 1 general recommendations prestressed concrete beam and girder design txdots policy is held firmly to a 6. Four span simply supported steel plate girder input. Precast, prestressed girder design example pgsuper training 242020 4. Lrfd design example for steel girder superstructure bridge. Threespan continuous straight composite i girder load and resistance factor design third edition customary u.
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