Analysis and design of prestressed box girder bridge by. To further streamline the design, the box girder used a concrete diaphragm rather than steel diaphragm at midspan and at the supports. A typical crosssection of the pc igirder is illustrated in fig. The box girder usually includes either structural steel, prestressed concrete or in the form of reinforced concrete or composite section. For this steel girder design example, a plate girder will be designed for an hl93 live load. Load distribution in simply supported concrete box girder highway. In this thesis analysis and design of prestressed concrete bridges deck slab, tgirder and box girder are carried out using irc. It is suggested to read the readme file and rules file for notes and quantities sheets to understand how the files are setup.
Design and analysis of bridge girders using different codes. Included as a bonus is a full detailed bill of quantities for the bridge. 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. The reinforced concrete deck slab has been designed by employing imperial design method. Box girder bridges are commonly used for highway flyovers and. The box girder design utilizes the concrete deck as a compression member which makes efficient use of the concrete compression strength. It is critical for the structure design to coordinate with the roadway design during the structure size and type process. Comparison of the amount of reinforcement for a boxgirder. The superstructure design includes the following elements. Elremaily construction technology laboratories, inc.
It provides policies, procedures and methods for developing and documenting the design process. Girder analysis and design is performed using the computer. Analysis and design of prestressed box girder bridge by irc. Downloadable files south dakota department of transportation. The structure size and type analysis is performed as part of the stage 1 design phase. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. The softened truss model theory applied to a prestressed concrete multiple cell box is developed in this study. The design variables and variable type considered in the study are tabulated in table 1. The stage 1 design phase shall be concurrent with or following the design phase for the roadway. The south kasheli bridge is a span prestressed concrete posttensioned box girder bridge that crosses the thane creek at thanebhiwandiwadapa road in maharashtra in western india.
Prestressed plank beams are considered a solid box beam for computing minimum losses and required number of strands. A box girder bridge also known as a box section bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. Design of prestressed concrete igirder bridge superstructure. This bridge is the igirder design example presented in the appendix of the aashto guide specifications for horizontally curved steel girder highway bridges, 2003. A typical crosssection of the pc i girder is illustrated in fig. The use of segmental concrete box girder was chosen as the flexible system and appropriate method in a municipal zone. These were classified into two main types according to their method of construction, namely those constructed on falsework and those erected in cantilever. 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. Used in cip posttensioned concrete box girder construction, deep bridge. Prestressed concrete box girder under combined torsion, shear, and flexure chapter 10references, p. Canadian precastprestressed concrete institute bob stofko, p. Guidelines for design and construction of decked precast, prestressed concrete girder bridges final report prepared for national cooperative highway research program transportation research board national research council r. The structure size and type report shall provide a brief description of the project and include narratives discussing the following. Introduction midas civil prestressed concrete with fcm bridge.
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. Design specifications and commentary for horizontally curved concrete boxgirder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage analysis 1. Pdf optimization of posttensioned box girder bridges with. Design of reinforced concrete bridges department of civil. The actual detailed design of a prestressed concrete boxgirder bridge requires a very significant effort. Development of design specifications and commentary for. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. The effective length for monolithic castinplace concrete is the clear distance between supports. Analysis and design of prestressed concrete box girder bridge. Design procedures are developed for both types of construction.
Detailed analysis and design of prestressed concrete girder is presented in this thesis in an organized way. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete. Concrete boxgirder bridge model tutorials computers and. Direct link design of concrete box girder bridge by jorge. 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. Beam properties for a plank beam now deduc t the area of the shear key.
The shear area of concrete is entered as input to some computer programs when the analysis is required to take into account the deformations due to shear. The concrete deck inherently forms a trough for the ballast to be placed. Guidelines provides a thorough background and guidance on deck design. Aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following.
Tentative design and construction specifications for precast. Strengthhigh performance concrete hschpc will be selectively used by most state dots. This manual is intended to be a guide for engineers working on bridge design projects for the wvdoh. Part 5 prestressed concrete adjacent member standards pdf 080818 part 6 castinplace concrete slab spans pdf 031015. Download a pdf of development of design specifications and commentary for horizontally curved concrete boxgirder bridges by the national academies of sciences, engineering, and medicine for free. Edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel i and boxsection flexural members within articles 6. When designing a bridge it is of high importance that the geometry for the cross section is optimized. Concrete structures chapter 5 wsdot bridge design manual m 2350. Elastic analysis and beam theory may be used in the design of precast segmental box girder structures.
Superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Research study 05574 curved plate girder design for safe. Indiana department of transportation2012 design manual chapter 406 prestressedconcrete structure design memorandum revision date publication date sections affected 1220 oct. Class 5000 or higher used in cip posttensioned concrete box girder construction, deep bridge foundations, or in other special structural applications if significant economy can be gained or structural requirements. Introduction box girders have become a prominent element in the con. The design approach resembles the approach of a preliminary design. A concrete box girder model prestressed with externally cfrp tendons was cast, and the stress redistribution, deflection and crack development of the girder model were tested for 1001d under. Fu1, fellow, asce, and yi tang2 this paper is part of the journal of engineering mechanics, vol. The attached excerpted resource materials have been made. This paper presents the investigation on several design aspects of.
This article discusses the general design considerations, design sequence, conceptual and detailed design requirements, and analysis procedures of segmental prestressed concrete box girder bridges. In this theory, the concrete torsional problem is solved by combining. Over two hundred200 pages of manual design calculation for a box girder bridge. The centerline of bearing is 9 inches from the end of the beam. Torsional analysis for prestressed concrete multiple cell box by chung c. The effect of class 70r tracked or wheel load will not be maximum since it is to be placed 1. 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. This example illustrates the design of a two span castinplace posttensioned concrete box girder bridge. Comprehensive design example for prestressed concrete psc. Attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge. Design guidelines for steel trapezoidal box girder systems. Design guidelines for steel trapezoidal box girder systems 6. Mar 27, 2019 attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge. Extend bearing stiffeners the full height of the girder.
It is noted that when constructing a large number of prestressed concrete bridges, precasting has a number of advantages over castinplace. Bentleys leap bridge enterprise saves time in analysis and. 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. Pdf bo x girder bridges are being made into use at many places.
Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m t girder all simply supported. Pdf analysis and design of post tensioned box girder.
Design of a reinforcedconcrete deckgirder highway bridge. Design and construction of spliced 1girder bridges ahmad m. Various studies have been performed so as to develop a more stable structure design by. Detailed charts give designers the minimum number of prestressing strands required given girder spacing, span length, and concrete strength. Posttensioned box girder bridge an analysis approach using. Pdf analysis and design of prestressed concrete box. In this thesis analysis and design of prestressed concrete bridges deck slab, t girder and box girder are carried out using irc. Authors todd helwig, joseph yura, reagan herman, eric williamson, dawei li 8. Deck slabs without transverse posttensioning shall be designed under the applicable provisions of section 5 concrete design. Inverted tgirder precast concrete girders high concrete. Design of prestressed concrete girder bridge request pdf.
Structural steel design, fabrication, and construction. As with all our concrete products, the inverted tgirder is manufactured offsite to speed production time. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. The box is typically rectangular or trapezoidal in crosssection. Structural concrete structures reinforced concrete construction. The design and optimization of segmentally precast. The first portion of this report contains a general description of the design features peculiar to this type of bridge and the background material necessary to make design calculations.
The formula for computing exterior diaphragm weight has been revised. Structural steel design, fabrication, and construction author. Precast options for bridge superstructure design john r. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. For exporting the tendon, select the tendon in the tendon definition dialogue box and then hit.
Project specific documents should specify when and. Appendix b example problems transportation research board. Part 7 steel plate girder standards pdf 043020 part 8 steel beam with timber deck superstructure standards pdf 043020 parts 1, 38 partial manual zip file download 71. The resource files are used by the office of road design for customized linestyles and fonts in microstation v8. 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. Cheryl prewett professor of civil engineering and director center for infrastructure research university of nebraskalincoln omaha, nebraska 114. Concrete strengths greater than the maximum limit may. Measured behavior of a curved precast segmental concrete. Details title prestress concrete composite girder bridge analysis and design as per eurocode midas civil duration 30 mins language english format mp4. All sets of charts provide designers with the limit state that controls the design. This bridge design manual was prepared by siteblauvelt engineers, inc. Continuous prestressed concrete girder bridges volume 1. Prestress concrete composite girder bridge analysis and. Comparison of the amount of reinforcement for a boxgirder bridge.
Pdf construction of precast segmental box girder bridge. Adot bridge design guidelines specify that deck design be based on the effective length rather than the centerlinetocenterline distance specified in the lrfd specifications. Lrfd steel girder superstructure design example lrfd. A box girder bridge is an apparent bridge sector in which main beams contain girders in the hollow box shape. Designforahighwaybridge tableofcontents chapter page i. Structural steel design, fabrication, and construction jamie f. Analysis of posttensioned concrete boxgirder bridges diva. Twospan castinplace posttensioned concrete box girder bridge. Only the design of slab bridge will be used for illustration. Mccormick rankin corporation paper prepared for presentation at the bridges economical and social linkages session of the 2007 annual conference of the transportation association of canada. Restriction on cip reinforced concrete box girder superstructures 062006. These new provisions have been structured to simplify their logic, organization and. The actual detailed design of a prestressed concrete box girder bridge requires a very significant effort.
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