Double bridge girder overhead cranes are used for heavy duty applications in the industry. Such buckling problems have to be given careful consideration in plate girder design. New modified design must have sufficient strength and capability to reduce the accordion effect. Design to ec3 part 15 nanyang technological university. Posts about design of gantry girder pdf written by wimackonya.
The design of crane girders new steel construction. Note that in this illustration of this member, the portal effect and fatigue are not considered. Design guidelines for steel trapezoidal box girder systems. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Design a gantry girder to be used in an industrial b uilding carrying. Honeycomb girder launching gantry is patent product made by zzhz, mainly used for highway bridge construction with full span method. 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. The first girder is internally prestressed, the second is externally prestressed. The results of the parametric study, along with critical design issues that were identified and related recommendations, are summarized in volume 1 of this report. Approximate analysis of horizontally curved girder bridges by ann l.
Freyermuth design research section portland cement association skokie, illinois continuous highway bridges with precast, prestressed girders have been built by a number of states. Contentlrfd design example for steel girder superstructure bridge aashtolrfd design example horizontally curved steel box girder bridge horizontally. This lecture seeks to complete the discussion of plate girder design by considering further aspects of detailed design. The design approach resembles the approach of a preliminary design. In this paper a detailed parametric design optimization of the main girder of box type is performed for a. International journal of bridge engineering ijbe, vol. 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. Appendix b example problems transportation research board. Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. Crane girder design crane girder details proper detailing is the key to good fatigue performance the vast majority of crane girder performance issues occur at the crane girder to column connection. Characteristics design of gantry girder is a classic example of laterally unsupported beam.
A beginners guide to simple plate girder design to ec3 part 15. In order to make this study possible, several simplifying assumptions were made in the configuration of the bridges and in the design of the reinforcement. Because this comprehensive numerical example exists, no further attention is paid to the interaction expression in this article. The steel box girder may have longitudinal stiffeners on flanges and webs and transverse. Shape sections, other than pipe and tubing, are typically available in 36, 50, or 50w grades. Impact of lrfd specifications on design of texas bridges. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. 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. New project automatically leads the user through the girder system layout wizard upon the selection girder system design project. This report is part of the socalled technical documents type 2 above and contains a. Structural steel of primary members shall satisfy the toughness requirements for zone 3. For example, the development of postbuckling action in a web plate, assumed in the previous lectures, can only occur when the elements at. Design step 5 design of superstructure prestressed concrete. To design prestressed girders using line girder analysis.
About line girder analysis infraworks autodesk knowledge. The proposed system of design with varying cross sectional shape with trapezoidal web is shown in figure. The purpose of this document is to illustrate how the pgsuper computer program performs its computations. Pdf design optimization of box type girder of an overhead crane. View initial results incanvas or purchase detailed girder design documentation in pdf format using cloud. Design of prestressed concrete igirder bridge superstructure. Worked examples presented at the workshop bridge design to eurocodes. Girder system design project procedures mdx software.
Posttensioned box girder bridge an analysis approach. Comparing bs5950 with ec3 part 15 in plate girder design design of plate girder bs5950 most design rules found in sections 4. Typically, for a specific jurisdiction, a relatively small number of girder sizes are available to select from. In the example below, the girder group 2 right exterior girder is exceeding a. Hence structural analysis will be perform by developing solid model on catia and fea software. Special and unique honeycomb girder, high stiffness, low deflection and high wind resistance. The initial girder size is usually selected based on. Design optimization of box type girder april 2015 ijst, transactions of mechanical engineering, volume 39, number m1 103 3. The impact factor i corresponds to 50 divided by span length plus 125, but is limited to a value of 0. Girder system design project procedures the first task in a girder system design project is to establish the framing plan of the girders and bracing in layout mode the menu system starts in this mode in girder system projects.
Chapter 14 prestressed concrete girders department of transport. Curved steel 3d example aashtoware bridge design and. Design guidelines for steel trapezoidal box girder systems 6. This includes the criteria and the allowable stresses used in the design, as well as alternative. Girder made by promixis, girder is the award winning home and industrial automation software that allows users of all skill level to make advanced scripts and macros to automate many functions both on the computer and around the house or office. Lrfd design example for steel girder superstructure bridge. Rail height mm effective length factor typical span crane step size m dead load factor live. Design of prestressed concrete girder bridge request pdf. Days creek, or ii executive summary in january 20, bridge diagnostics, inc. The gantry girder is subjected to bending in vertical plane as well as in horizontal plane along with twisting. With the help of the overhead cranes, heavy equipment selection from design of steel structures book. Spread slab beams, steel plate girders, and steel tub girders. Extend bearing stiffeners the full height of the girder. If capacity of crane is moderate, the gantry girders rest on brackets connected to roof column of industrial shed.
Imia short paper provided by michael spencer, zurich insurance, london launching girders. A design optimization problem for steel box girder sections is formulated and a numerical solution procedure is presented. Structures design office lrfd design examples files pdfs fdot. The recommended spandepth ratio for simply supported girder varies between 12 for short span and 20 for long span girder. Steel bridges ii structural steel rev design project. Boundary conditions considering crane parked at one position and lifting.
Steel plate is available in 36, 50, and 50w grades. Bridge design, steel girder, load and resistance factor. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. This design example was edited in 2012 by hdr engineering, inc. A launching girder is in general a design andbuilt machine used in precast posttensioned bridge construction. Past manual notices are available in a pdf archive. Imia short paper provided by michael spencer, zurich. Jiang2 1,2 southern illinois university carbondale, dept.
Steel bridge design handbook steel structures bridges. Structural steel 1 of 18 rev plate girder design project. Appendix i design example integral steel boxbeam pier. Main girder beam design and finite element analysis of 2x160 ton gantry crane, ismail gerdemeli et al. The formulation is based on the load and resistance factor design lrfd procedure. Sample chapters civil engineering bridge erection machines marco rosignoli encyclopedia of life support systems eolss 2. Main features of bridge erection machines the industry of bridge erection machines is a highly specialized niche. Steel girder design example using 3rd edition aashto lrfd. For this steel girder design example, a plate girder will be designed for an hl93 live load. Curved steel 3d example aashtoware bridge design and rating. Heins september, 1937 december 24, 1982 during the past decade, there has been extensive use of steel box girders for straight and curved highway and transit structures.
Analysis and design of composite steelgirder bridge. Analysis and design of prestressed box girder bridge by irc. The main difference is that the block shear rupture in the beam web must be considered. If you need to print pages from this book, we recommend downloading it as a pdf. This manual documents policy on bridge design in texas. Lrfd steel girder superstructure design example lrfd. It consists of lifting devices and a supporting structure for lifting precast beams and precast bridge segments in position for assembling. Bridge erection machines encyclopedia of life support. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. Design of continuous highway bridges with precast, prestressed concrete girders clifford l. May 18, 20 contentlrfd design example for steel girder superstructure bridge aashtolrfd design example horizontally curved steel box girder bridge horizontally. In workshops and factories a very important and useful requirement is to have the means for lifting and moving heavy loads from one part to the. The application of genetic algorithms gas for a class of numerical examples is investigated. The design shear forces and bending moments are shown in fig.
Example 2 is precisely the case under consideration a gantry girder, except the selected member is a ub with no plate. The initial girder size is usually selected based on past experience. Project specific examples of these girders may be sourced from the lucinda drive project on the port drive. Pdf in india, industries usually have quality range of gantry girders for industrial sheds. 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. Design and construction of spliced 1girder bridges ahmad m. Lrfd design example for steel girder superstructure bridge fhwa. Since revisions or additions to the design file drawings may occur at any time, the. The actual detailed design of a prestressed concrete boxgirder bridge requires a very significant effort. Bridge steels and their mechanical properties volume 1. Design procedure for beamtogirder connections design procedure for beamtogirder connection is similar to that for the beamtocolumn connection. One way of improving the load carrying resistance of a slender plate is to employ stiffeners lecture 8.
To extend the coverage of plate girder design previously given in lectures 8. 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. Abstract the purpose of this example is to illustrate the use of the aashto lrfd bridge design for. This short paper, with its appendix, is primarily intended to provide risk engineers with a simple reference tool to promote enquiries into the training. Design step 5 design of superstructure prestressed.
Design and construction of spliced 1 girder bridges ahmad m. Guidelines on safe use of lifting frames and launching. Examples of bridges of this type built by the states of tennessee and. The continuous composite deck is made up of two steel girders with i. This bridge is the igirder design example presented in the appendix of the aashto guide specifications for horizontally curved steel girder highway bridges, 2003. Precast, prestressed girder design example pgsuper training 242020 1. Line girder analysis perform analysis and design checks on all the. Heins september, 1937 december 24, 1982 during the past decade, there has been extensive use of steel box girders for straight and curved highway and transit. Analysis and design of prestressed box girder bridge by. To include the design of transverse web stiffeners and end posts and consideration of patch loading. Comparison of the amount of reinforcement for a boxgirder. Every machine is initially conceived for a scope, every manufacturer has its own technological. Prestressed girder design spreadsheet download civilax is the knowledge base covering all disciplines in civil engineering. Launching girder launching girder is also known as launching gantry.
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