Shear resistance of the stiffened web panel closest to the internal support p1. 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 of a single cell rcc box girder bridge youtube. Although normally the box girder bridge is a form of beam bridge, box girders may also be used on cablestayed bridges and other forms. 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. 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. 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. Girder bridges are the most natural and simplest form of bridging between two points. If made of concrete, box girder bridges may be cast in place using falsework. This design aid was developed using mainframe computers in. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. 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.
Pdf construction of precast segmental box girder bridge. 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. Transverse analysis of psc box girder in cablestayed. Csibridge watch and learn video tutorials cover a wide range of topics, from basic product overviews to advanced subjects such as nonlinear sequential construction. After reading this article you will learn about the design of slab and girder bridges. Design and rating for curved steel i and boxgirder bridge structures c. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. American and japanese design and detailing practices of prestressed concrete box girder bridges are compared.
Design step 2 example bridge prestressed concrete bridge design example haunch depth 4 in. 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. 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. Investigation into the project revealed numerous issues in the bridge s design and construction. This design example tries to follow this outline as closely as is. 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. Design of prestressed concrete igirder bridge superstructure. Preliminary design of precast, segmental boxgirder. 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. Drawing labels, details, and other text information extracted from the cad file.
Csibridge watch and learn computers and structures. Optimal design of a posttensioned box girder is achievable by correct selection of design variables. This is a bridge design drawing using 4 cells box girder normally reinforced. List of lattice girder bridges in the united kingdom. 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. 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. Transverse design of adjacent precast prestressed concrete. Builtup plate girder bridges with girders 5feet deep or greater in depth shall be.
Equations for shear flow and the torsional constant for cross sections are presented in this appendix. 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. Concrete boxgirder bridge design per aashto lrfd 2007. Prestressed concrete continuous box girder bridge design. 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. The design procedure was developed through an investigation of torsion in curved girders and the effect of torsion on twintrapezoidal box girder bridge systems. A new precast, prestressed box girder bridge design suitable to u. Continuous span, cast in place box girders have been popular. Lrfd design examples federal highway administration.
The cause of cracking in posttensioned concrete box girder. Many practical examples have been analyzed, and from these results, conclusions valuable to design practice have been deducted. Posttensioned box girder bridge an analysis approach using equivalent loads j. 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.
Key words steel, box girders, trapezoidal, torsional 18. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Appendix i design example integral steel boxbeam pier. Box girder types bridge building bridges of dublin. Design guidelines for steel trapezoidal box girder systems 6. The box girder and the truss bridge evolved together but at different paces depending on the technology available and the geographical location e. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge. A computer spreadsheet application was specifically developed for this investigation. A method for the design of intermediate external diaphragms is presented herein. The term lattice girder, is used in the uk and lattice truss is more widely used in the usa. 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. May 22, 2014 concrete box girder bridge design per aashto lrfd 2007.
Prestressed concrete psc girder superstructure bridge design example us units pdf version 1. Design of concrete structures shall be based on the requirements and guidance cited. If you need to print pages from this book, we recommend downloading it as a pdf. Concrete boxgirder bridge model tutorials computers.
Appendices c and d contain design examples for threespan continuous bridges. This is indicative of the lod requirements for box girder bridge deck systems. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. Threespan continuous straight composite i girder load and resistance factor design third edition customary u. The structure is a cable stayed bridge with concrete superstructures, pylons and piers. The transverse analysis was carried out in midascivil. Analysis and design of prestressed box girder bridge by. 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.
Girder analysis and design is performed using the computer program conspan, version 09. Lrfd steel girder superstructure design example lrfd. 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. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. The behavior of box girder section for a general case of an. The box is typically rectangular or trapezoidal in crosssection. Chapter 15 structural design requirements for designbuild. Bearing stiffeners, intermediate transverse web stiffeners, longitudinal web stiffeners, box girder bottom flange stiffeners. Preliminary design system for concrete box girder bridges. In these cases, straight steel box girders are used in regions where the clear span requirements preclude the use of the concrete ubeams. Decisions about crosssectional dimensions made during preliminary design can have a substantial influence on the final cost of the bridge. Jiang2 1,2 southern illinois university carbondale, dept. Lrfd design example for steel girder superstructure bridge. An image of a model taken from the sap2000 bridge examples document is shown in figure 1.
Siteblauvelt engineers cranberry township, pa pittsburgh, pa b s d i design. Box girder bridge design american institute of steel. Overview of reinforcedconcrete box girder bridge design capability. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. Optimization of posttensioned box girder bridges with. 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.
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. The design is based on requiring the deck to act as a rigid assembly of longitudinal and transverse members. 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. Plan, elevation and section views are shown on the following pages. Steel box girder design structural engineering general. For this steel girder design example, a plate girder will be designed for an hl93 live load.
Using of softwares for the design of bridges is much better than the manual procedure. For simply supported spans, this limit is generally found to be nearly 10 metres and for continuous or balanced cantilever type. Siva kumar 2 1 department of civil engineering, bitspilani hyderabad campus, india. A neural networkbased design system is presented in this paper for preliminary design of concrete box girder bridges. Analysis and design of prestressed box girder bridge by irc. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. 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. Buckling verifications at internal support p1 according to vi section 10, en 1993. 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. This design example was edited in 2012 by hdr engineering, inc. Posttensioned box girder bridge an analysis approach using. Download free bridge design and analysis spreadsheets. The example illustrates the design of a typical threespan continuous straight steel i girder bridge with spans of 140.
Unfortunately, this book cant be printed from the openbook. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica. It is assumed the bridge will be cast on falsework. Measured behavior of a curved precast segmental concrete. Box girder bridge design, engineering journal, american institute of steel construction, vol. Appendix b example problems transportation research board. 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. 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. Lessons learned in the design and erection of box girder. Lrfd design of double composite box girder bridges purvik patel abstract conventional continuous steel bridges only exhibit composite behavior in the positive moment region.
Analysis of box girder and truss bridges civil engineering. 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. 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. White paper the benefits of plm built on the salesforce platform. Design and rating for curved steel i and box girder. Download free bridge design and analysis spreadsheets essential for bridge engineering. 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 example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation. List of lattice girder bridges in the united kingdom wikipedia. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport.
Box girder bridge deck systems bim object definition from nbs. Box girder section concrete bridges dwg section for autocad. Mar 12, 2015 box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Example b1 comprehensive example problem description the example problem is a three span continuous box girder bridge that is 700 ft. The example structure below is from saemangeum in korea.
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. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. 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. Steel bridge tutorials computers and structures, inc. An overview of the design and erection issues is presented, particularly those dealing with thin. Box girder article about box girder by the free dictionary. Access doors, lighting, receptacles and penetrations. 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. 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. 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. North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. Similar composite action may also be achieved in the negative moment region by casting a bottom concrete slab between the points of inflection.
Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. 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. This design is particularly suited to piecemeal crane erection. The superstructure is prestressed concrete girders. Design guidelines for steel trapezoidal box girder systems. Precast options for bridge superstructure design john r.
Posttensioned box girder bridge an analysis approach. 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. Chances are very high that today, a bridge engineer will learn how to design a bridge girder before any other bridge type. Interaction between bending and shear at support p1. No cost download the posttensioned box girder design can be downloaded from the manual fhwa at no cost at s. Lincoln had a publication on the design of orthotropic bridge girders. Introduction box girders have become a prominent element in the con. Bridge division office of engineering federal highway administration washington, d. 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. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020.119 1197 1086 1063 1145 17 1343 332 1326 120 787 1046 208 980 1538 872 746 544 918 941 206 188 995 1312 64 1445 925 949 1400 1470