A design example followed by a load rating analysis illustrates the engineering computations performed by pgsuper. By 1982, the sunshine skyway bridge in tampa, florida, had set a new record for concrete bridges, with a main span of 365 m 1,200 ft. Concrete deck slabs on bridges designed in accordance with aashto lrfd for. Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary task order dtfh6102t63032 us customary units submitted to the federal highway administration prepared by modjeski and masters, inc. Analysis and design of prestressed concrete igirder bridge. The bureau of bridge design has assembled sample plans and bridge plan checklists that can be used as an aide in the preparation of detail construction plans for bridges.
Prestressed concrete by n krishna raju pdf download free. Design step 3 design flowcharts prestressed concrete bridge design example task order dtfh6102t63032 310 creep and shrinkage calculations cont. It can be used to produce beams, floors or bridges with a longer span than is practical with ordinary reinforced concrete. Bridge design free download as powerpoint presentation. The idea of prestressed concrete has been around since the latter decades of the 19th century, but its use was limited by the quality of the materials at the time. Prestressed concrete refers to concrete that has applied stresses induced into the member. Pci has developed preliminary design charts in accordance with the aashto. Why prestressed concrete bridge girders are the preferred choice for long lasting bridges prestressed concrete girders are the leading choice for bridge construction across the. Design step 5 design of superstructure prestressed concrete. Bridge is a inherent part of the structural engineering. Concrete is an artificial stone which is obtained after hardening the homogenous mixtures of cement, water, aggregates and sometime admixture andor additive to modify the fresh and hardened concrete.
Threespan continuous straight composite steel igirder bridge 5. Truss girder rail bridge worked example 1 made by sssr date 8 structural steel design project calculation sheet checked by vk date 4 design for truss members. Comprehensive design example for prestressed concrete psc. Finally, a complete design of the bridge including girders, columns, abutments and the deck was created. Past manual notices are available in a pdf archive. Show appropriate gradient straight, hump or sag shape on the dead load deflection diagram. Notes author staff bridgesight software sponsor bridgesight software. Twovolume design handbook with complete design examples for prestressed concrete filename. Pgsuper uses a stateoftheart iterative design algorithm and other iterative computational procedures. Policy support documents resulting from the work of the jrc and cooperation with partners. 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.
The concrete reinforcing steel institute is proud to honor five great concrete bridges built between 1990 and 2000. Wsdot standard prestressed concrete girder types 5 79. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 549 sample calculations at 54 ft. Bridge construction how to design and construct a bridge. Washington state transportation center trac washington state university. Section 2 concrete deck slabs on igirders, ubeams, spread box beams. Nmdot does not have any additional requirements beyond these specifications for critical and essential bridges. Reinforced concrete slab design using the empirical method. If you continue to use the site without changing your cookie settings, we assume you are fine with our cookies and the way we use them.
Worked examples presented at the workshop bridge design to eurocodes. Various concrete equations were updated in aashto to include a concrete. The manual is based on the aashto lrfd bridge design specifications. The diagram shown above is for a straight gradient. Each stands as a solid testament to concretes versatility, its cost effectiveness, and its durability. Such design ideas as making it a onespan bridge and what material to use in construction, prestressed concrete or steel, were further investigated. In addition to general design guidance and information on detailing practices, this section contains three design examples. Leap bridge concrete is design and analysis software for concrete bridges of all types. Prestressed concrete is a method for overcoming concrete s natural weakness in tension.
This help file describes input and analysis features of slab bridge designer 2. Aashto lrfd bridge design specifications, fifth edition with 2011 interim revisions. Case study design of a concrete bridge 147 chapter 9. Title reinforced concrete slab design using the empirical method publication no. Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary. Select girder line superstructure and left click the ok button to accept and close. General an outline for basic steps for concrete bridge design is given in appendix a5 of the lrfd specifications. Pdf on apr 16, 2017, nabeel albayati and others published structural bridge design chapter 7example of prestressed concrete bridge 2017 find, read and cite all the research you need on. Many references to section 5 of aashto have been updated to reflect the reorganization of the section. Chapter 5 provides valuable information for the design of concrete girder. Presenting civil engineering book download prestressed concrete, written by n krishna raju.
Reinforced concrete bridges concrete reinforcing steel. Concrete bridge design and analysis software bentley. Fundamentals of prestressed concrete bridge with solved. It took until the 1920s and 30s for its materials development to progress to a level where prestressed concrete could be used with confidence.
File sizes should not exceed 50 mb for each pdf file. Bridge concrete design download bridge design spreadsheet. Steel bridges ii structural steel rev design project. Load and resistance factor design lrfd for highway bridge. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Pci bridge design manual, volumes one and two, mnl397. Thus, assuming that the validity of the original premise holds true and that suitable procedures have evolved from the developmental work of project c101, all of the tools that are needed for a comprehensive procedure. The codes of practice limit the allowable stresses in prestressed concrete. Many applications of prestressed concrete involve the combination of precast prestressed concrete beams and insitu reinforced concrete slab. Only the design of slab bridge will be used for illustration. This manual documents policy on bridge design in texas. Most of the work of psc design involves ensuring that the stresses in the concrete are within the permissible limits. This report is part of the socalled technical documents type 2 above and contains a. Wsdot standard prestressed concrete girder types 579.
Note that in this illustration of this member, the portal effect and fatigue are not considered. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 52 notice that fatigue in the prestressing steel need not be checked for conventional prestressed girders s5. The beams are designed to act alone under their own weights plus the weight of the wet concrete of the slab. Calculate shrinkage strain in beam at infinite time according to s5. Design of prestressed concrete igirder bridge superstructure. From this paper it can be observed that a few studies have been performed regarding the optimum design of the igirder bridge structure considering the total cost of materials. Eurocodes required for concrete bridge design en 1990 en 1991 en 1992 en 1997 design analysis and section design, partial factors design approach, partial factors, foundations, earth pressures etc. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions.
Download prestressed concrete by n krishna raju pdf book free from prestressed concrete by n krishna raju pdf. Design of double tee continuous prismatic prestressed concrete beam bridges article pdf available october 2000 with 1,364 reads how we measure reads. Retaining wall design example structural engineering software. Design examples of seismic retrofits of normal bridges. Limit states, combination and partial factors actions, inc.
Worked examples presented at the workshop bridge design to eurocodes, vienna, 46. Types and design methods of reinforced concrete bridges are presented. Simple span reinforced concrete slab bridge rating example. Introduction to concrete concretess versatility, durability, sustainability, and economy have made it the worldss most widely used construction material. We use cookies to provide you with the best possible user experience. The term concrete refers to a mixture of aggregates, usually sand. Compare the pdf file with the dgn file for validation on correct fonts. This design example tries to follow this outline as closely as is relevant. Pdf format of boring logs, and other subsurface investigation data ctp, etc. In this example, the structural design of the three retaining wall components is performed by hand. Download a very useful and instructive excel sheets that is specifically created to design various vital portions and sections of different types of bridges conforming to your requirement and necessities. Late in the 1970s, cablestayed construction raised the bar for concrete bridges. We can clearly see the effectiveness of using precast prestressed concrete girder configuration as it gives us most of the design.
Learn how to design a bridge in just a few easy steps with some interesting and amazing bridge. Since revisions or additions to the design file drawings may occur at any time, the. Plans having prestressed concrete members shall include a dead load deflection diagram. Typically, wires or tendons are stretched and then blocked at the ends creating compressive stresses throughout the members entire crosssection. Calculate shrinkage strain in the beam at the time the slab is cast s5. References to lrfd design specifications refer to the current aashto lrfd bridge design. Retrofit of rectangular bridge columns using cfrp wrapping. Case study design of a steel bridge 165 chapter 10. A common example is the insitu infill between precast bridge beams. Bss090119991 abstract this design example illustrates the empirical design method for composite concrete bridge decks specified in article 9. Design manual for bridges and structures sixth edition, 2016 nj. Structures design office lrfd design examples files pdfs fdot. Comprehensive design example for prestressed concrete girder.
The girder line definition will be used since a 12 wide. Span by span 162k, pdf there are a number of different beam shapes in the u. Prestressed concrete bridge beams typically use 15. View example in pdf format design example 1 download example as a mathcad. Mar 19, 2014 click on a datetime to view the file as it appeared at that time. Prestressed concrete is basically concrete in which internal stresses of a suitable magnitude and sitribution are introduced so that the stresses resulting from external loads are counteracted to a desired degress. It will also provide design aids and other sources of information along with cross references to other parts of this manual to assist in the design and preparation of plans. From arches to swing leaves, from foundation to superstructure, concrete is clearly a superior bridgebuilding material. The following is a summary of the major changes that have been incorporated into the slab bridge design guide. From girder end midspan of noncomposite beam girder top stress. Recommended citation rinaldi, valentino, design of gfrp reinforcement for concrete bridge structural components 2015.
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