American and japanese design and detailing practices of prestressed concrete box girder bridges are compared. Concrete boxgirder bridge model tutorials computers. Lessons learned in the design and erection of box girder. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140. Posttensioned box girder bridge an analysis approach. Jiang2 1,2 southern illinois university carbondale, dept. The structure is a cable stayed bridge with concrete superstructures, pylons and piers. Download free bridge design and analysis spreadsheets essential for bridge engineering. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. The cause of cracking in posttensioned concrete box girder. Unfortunately, this book cant be printed from the openbook. Transverse analysis of psc box girder in cablestayed. Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. Siva kumar 2 1 department of civil engineering, bitspilani hyderabad campus, india.
Preliminary design of precast, segmental boxgirder. Box girder types bridge building bridges of dublin. A method for the design of intermediate external diaphragms is presented herein. Mar 12, 2015 box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Design of a single cell rcc box girder bridge youtube. Continuousspan, castinplace, posttensioned box girders have been popular in modern bridge construction not only because of their aesthetic appearance, but also because they provide the following advantages. In these cases, straight steel box girders are used in regions where the clear span requirements preclude the use of the concrete ubeams. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. Analysis and design of segmental box girder bridge md tauheed reyaz1, syeda nikhat fathima2 1lecturer, dept of civil engineering, hms rural polytechnic, karnataka, india 2assistant professor, dept of civil engineering, hms institute of technology karnataka, india abstract a bridge may be a means that by that a road. Equations for shear flow and the torsional constant for cross sections are presented in this appendix. The system is based on a loose coupling model that integrates the artificial neural network and the fuzzy network to perform the task of noisy data filtering, knowledge extraction, and candidate synthesis. The behavior of box girder section for a general case of an.
Builtup plate girder bridges with girders 5feet deep or greater in depth shall be. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. 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. It is assumed the bridge will be cast on falsework. The west gate bridge is one of a number of box girder bridges built during the mid 20th century, and was one of four to fail in a three year period. After reading this article you will learn about the design of slab and girder bridges. Finally, an example of the analysis of a bridge composed of a continuousspan, posttensioned concrete box girder superstructure and a concrete pier is also demonstrated using the approximate equivalent load method. Plan, elevation and section views are shown on the following pages. For simply supported spans, this limit is generally found to be nearly 10 metres and for continuous or balanced cantilever type. Prestressed concrete psc girder superstructure bridge design example us units pdf version 1. Measured behavior of a curved precast segmental concrete. Concrete boxgirder bridge design per aashto lrfd 2007.
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. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. Lrfd design examples federal highway administration. Lrfd design example for steel girder superstructure bridge. Download free bridge design and analysis spreadsheets. This design example tries to follow this outline as closely as is. The box is typically rectangular or trapezoidal in crosssection. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. Design of concrete structures shall be based on the requirements and guidance cited. Key words steel, box girders, trapezoidal, torsional 18. Example b1 comprehensive example problem description the example problem is a three span continuous box girder bridge that is 700 ft. Posttensioned box girder bridge an analysis approach using equivalent loads j. Using of softwares for the design of bridges is much better than the manual procedure.
A computer spreadsheet application was specifically developed for this investigation. This design aid was developed using mainframe computers in. If made of concrete, box girder bridges may be cast in place using falsework. On the premise that those who ignore history will be condemned to relive it, this paper attempts to document those types of problems that lead. Appendix i design example integral steel boxbeam pier. Attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steel girder bridge, and a cablestayed bridge. Appendix b example problems transportation research board. List of lattice girder bridges in the united kingdom. 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. Csibridge watch and learn computers and structures. Decisions about crosssectional dimensions made during preliminary design can have a substantial influence on the final cost of the bridge. Steel box girder design structural engineering general. List of lattice girder bridges in the united kingdom wikipedia.
Analysis and design of prestressed box girder bridge by. Such was the case with the box girder as it evolved from the principle of the initial bridge beam but with the centre hollowed out. The coronado bay bridge has the tallest box girder. The grandmere bridge, a 285 m 935 ft long castinplace segmental box girder bridge, experienced some distress which required strengthening by adding external prestressing equivalent to 30% of. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Although normally the box girder bridge is a form of beam bridge, box girders may also be used on cablestayed bridges and other forms. This list is intended to help identify a particular early form of lattice girder bridge which was popular with bridge engineers particularly in the united kingdom in the latter half of the 19th century the term lattice girder, is used in the uk and lattice truss is. Design step 2 example bridge prestressed concrete bridge design example haunch depth 4 in. 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. Analysis and design of prestressed box girder bridge by irc.
Bearing stiffeners, intermediate transverse web stiffeners, longitudinal web stiffeners, box girder bottom flange stiffeners. Drawing labels, details, and other text information extracted from the cad file. Lrfd steel girder superstructure design example lrfd. Mar 27, 2019 attached is a model file and a pdf which outlines the procedure for modeling a concrete box girder bridge, a steel girder bridge, and a cablestayed bridge. Interaction between bending and shear at support p1. This is a bridge design drawing using 4 cells box girder normally reinforced. For this steel girder design example, a plate girder will be designed for an hl93 live load. Csibridge watch and learn video tutorials cover a wide range of topics, from basic product overviews to advanced subjects such as nonlinear sequential construction. Jun 15, 20 the authors have established a more accurate thinwalled beam theory of box girder, and, as an extension of the thinwalled beam theory, developed a theory of bending and torsion of the truss bridge. Girder analysis and design is performed using the computer program conspan, version 09. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica.
North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. Design and rating for curved steel i and boxgirder bridge structures c. 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. Preliminary design system for concrete box girder bridges. Access doors, lighting, receptacles and penetrations. If you need to print pages from this book, we recommend downloading it as a pdf. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. Investigation into the project revealed numerous issues in the bridge s design and construction. This is indicative of the lod requirements for box girder bridge deck systems. Shear resistance of the stiffened web panel closest to the internal support p1. This paper discusses the coordinated design research program conducted under the sponsorship of the united states steel corporation, on the subject of steel box girder bridges. The use of girder as a natural bridging element is abundantly evident in nature, such as a fallen tree trunk over a stream or rock. Similar composite action may also be achieved in the negative moment region by casting a bottom concrete slab between the points of inflection. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following.
Buckling verifications at internal support p1 according to vi section 10, en 1993. An overview of the design and erection issues is presented, particularly those dealing with thin. Optimal design of a posttensioned box girder is achievable by correct selection of design variables. This design is particularly suited to piecemeal crane erection. Box girder bridge deck systems bim object definition from nbs. 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. Design guidelines for steel trapezoidal box girder systems.
Girder bridges are the most natural and simplest form of bridging between two points. 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. Many practical examples have been analyzed, and from these results, conclusions valuable to design practice have been deducted. Horizontally curved concrete box girder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage analysis 1. Steel bridge tutorials computers and structures, inc. Overview of reinforcedconcrete box girder bridge design capability.
The cause of cracking in posttensioned concrete box girder bridges and retrofit procedures walter podolny, jr. 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. Box girder bridge design american institute of steel. Based on observations made during construction, and on measurements taken of concrete strains, tendon strains, temperature distributions, and slopes, a series of detailed design, construction, and inspectionrelated recommendations are made. White paper the benefits of plm built on the salesforce platform. This list is intended to help identify a particular early form of lattice girder bridge which was popular with bridge engineers particularly in the united kingdom in the latter half of the 19th century. The box girder and the truss bridge evolved together but at different paces depending on the technology available and the geographical location e. Box girder article about box girder by the free dictionary.
Continuous span, cast in place box girders have been popular. The term lattice girder, is used in the uk and lattice truss is more widely used in the usa. This design example demonstrates the design of a tangent threespan continuous composite tub girder bridge with a span arrangement of 187. Then the 1,400ton, 103mlong box girder was lifted successfully from the yangtze river to its final place with strand jacks. The superstructure is prestressed concrete girders. Manufacturer product data template complete this electronic spreadsheet to ensure that your box girder bridge deck systems product information meets the requirements of level 2 bim. The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation. Precast options for bridge superstructure design john r. May 22, 2014 concrete box girder bridge design per aashto lrfd 2007.
Extending the spatial curved beam finite element theory considering effect of initial curvature developed earlier 7, the objective of this paper is to propose a 1d curved box girder dynamic finite element of three nodes and twentyone degrees of freedom taking account of tension, compression, bending, torsion, and warping and then apply it to analyze the natural vibration characteristics and. A neural networkbased design system is presented in this paper for preliminary design of concrete box girder bridges. Introduction box girders have become a prominent element in the con. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Box girder section concrete bridges dwg section for autocad. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. Lrfd design of double composite box girder bridges purvik patel abstract conventional continuous steel bridges only exhibit composite behavior in the positive moment region. No cost download the posttensioned box girder design can be downloaded from the manual fhwa at no cost at s. Design guidelines for steel trapezoidal box girder systems 6. Pdf construction of precast segmental box girder bridge. Design of prestressed concrete igirder bridge superstructure.
The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. The network rail standard box girder type bridge that covers a span range from 21m to 39m uses trapezoidal box girders with a transverse ribbed steel deck spanning between notionally pinjointed shear plate connections. Optimization of posttensioned box girder bridges with. The design is based on requiring the deck to act as a rigid assembly of longitudinal and transverse members. A new precast, prestressed box girder bridge design suitable to u. So through this project, we are analyzed the structural behavior of post tensioned box girder bridge using the recently developed software called csi bridge version 2015. Design and rating for curved steel i and box girder. 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. Analysis of box girder and truss bridges civil engineering. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport.
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. This design example was edited in 2012 by hdr engineering, inc. Posttensioned box girder bridge an analysis approach using. T or i girder 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. This horizontally curved steel box girder br idge design example was originally developed in the nchrp 1238 project using the 1993 aashto gu ide specifications for horizontally curved steel girder bridges. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. The example structure below is from saemangeum in korea. Prestressed concrete continuous box girder bridge design. The transverse analysis was carried out in midascivil.
Appendices c and d contain design examples for threespan continuous bridges. Box girder bridge design, engineering journal, american institute of steel construction, vol. Transverse design of adjacent precast prestressed concrete. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. This paper describes the bridge type selection process, preliminary and detailed design procedures, unique structural details and construction and steel erection for four complex curved single steel box girder bridges completed within the groundside component of the terminal development project at. Chapter 15 structural design requirements for designbuild. The design procedure was developed through an investigation of torsion in curved girders and the effect of torsion on twintrapezoidal box girder bridge systems. Lincoln had a publication on the design of orthotropic bridge girders. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge. Bridge division office of engineering federal highway administration washington, d. Precast, prestressed segmental box girder bridges are now accepted as an economical alternative for spans over 150 ft 46 m. Box girder bridges of shallow rectangular crosssection and aerofoil characteristics became extensively used in road bridges from the 1960s onwards, such as the severn bridge, being much lighter than the deeper trusstype girder construction used on previous bridges such as the golden gate bridge.
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