A method for the design of intermediate external diaphragms is presented herein. Tentative design and construction specifications for precast. Over the years, bridge engineers have been concerned about the response of prestressed concrete pc girder bridges that had been hit by overheight vehicles or vehicle loads. 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. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. Key words i girder, curved bridge, lifting, erection, construction 18. Minor bridge bridge having a total length up to 60 meters. The purpose of this document is to illustrate how the pgsuper computer program performs its computations. This document consists of a comprehensive design example of a prestressed concrete girder bridge. 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. Impact of lrfd specifications on design of texas bridges. Analysis and design of prestressed concrete box girder bridge. The box is typically rectangular or trapezoidal in crosssection. Wisdot bridge manual chapter 19 prestressed concrete january 2020 197 19.
Design, detailing, and testing of non posttensioned transverse connections in adjacent boxgirder bridges. Numbering of tables and figures tables and figures shall be numbered using the chapter, section, subsection in which they are located, and then a hyphen followed by consecutive numbers. Computeraided design of prestressed concrete cellular bridge decks. Timedependent deflection of inspan hinges in prestressed concrete box girder bridges. Analysis and design of prestressed box girder bridge by irc. 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.
Pdf precast prestressed concrete adjacent box girder bridges are widely used in short and medium span bridges. Wisdot bridge manual chapter 19 prestressed concrete. Tr424 steel diaphragms in prestressed concrete girder. Concrete structures chapter 5 wsdot bridge design manual m 2350. Key words prestressed concrete, lrfd, design, bridge girders, u54 girder, type iv girder, type c girder, parametric study 18. Predicting camber, deflection, and prestress losses in.
When a bridge is struck by an overheight vehicle or vehicle load, usually the outside and in some instances one of the interior girders are damaged in a bridge. 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. Design of prestressed concrete girder bridge request pdf. Optimal design of a posttensioned box girder is achievable by correct selection of design variables. Design of prestressed concrete igirder bridge superstructure. Abstract a number of prestressed concrete igirder bridges built in the past several decades have demonstrated the ability of precast, prestressed spliced girder bridges to compete with structural steel plate girder bridges in the 120 ft 300 ft span. 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. Pgsuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. Texas u54 girder using both the aashto standard specifications and aashto lrfd specifications were also developed and compared. The design procedure was developed through an investigation of torsion in curved girders and the effect of torsion on twintrapezoidal box girder bridge systems. This bridge design manual was prepared by siteblauvelt engineers, inc. The examples cover the principal steps in the verification of the. Example b1 comprehensive example problem description the example problem is a three span continuous box girder bridge that is 700 ft.
Design guide for composite box girder bridges steelconstruction. Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary. Overview of reinforcedconcrete boxgirder bridgedesign capability. Concrete bridge lrfd specifications parsons brinckerhoff page 1 1. 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 behavior of box girder section for a general case of an eccentric load has been s tudied and presented its studies in chapter 2. The substructure consists of integral end abutments and a multicolumn intermediate bent. 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. This publication presents worked examples of the detailed design of two composite highway bridges. 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. This manual is intended to be a guide for engineers working on bridge design projects for the wvdoh. The first example is of multi girder form, the second is of ladderdeck form. The design and optimization of segmentally precast.
Posttensioned box girder bridge an analysis approach using. It is assumed the bridge will be cast on falsework. Structural design guidelines for concrete bridge decks. It includes some pdf documents containing explanatory examples and an overview of the strategic development of this structural code. For medium span highway bridges, composite box girders offer an attractive. Elastic analysis and beam theory may be used in the design of precast segmental box girder structures. Comprehensive design example for prestressed concrete psc. Cfcc prestressed precast concrete box beam with castinplace concrete slab grace et al. Bridge is a inherent part of the structural engineering. Design manual 16 deals with the calculation of two composite bridges. Jan 18, 2018 for example, the behavior of hpc packs is shown below. 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.
A computer spreadsheet application was specifically developed for this investigation. Elremaily construction technology laboratories, inc. North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. Pdf design, detailing, and testing of nonposttensioned transverse. Report date october 2002 steel trapezoidal box girder bridges 6. Section a6 flexural resistance sample calculation from opis to compare with. Design example 37 b s d i lrfd negative moment loading article 3. Optimal design of a posttensioned box girder is achievable by.
This example illustrates a concrete box girder bridge following horizontal curvature and parabolic slope. 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. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation. It provides policies, procedures and methods for developing and documenting the design process. Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. Concrete remains the most common material for bridge construction around the world, and prestressed concrete is frequently the material of choice. Key words bridge design, prestressed concrete, load and resistance factor design, lrfd, concrete deck, intermediate. Optimization of posttensioned box girder bridges with. May 22, 2014 concrete box girder bridge design per aashto lrfd 2007. Tentative design and construction specifications for. The bridges are designed and constructed adopting the following irc specifications. The superstructure consists of two simple spans made continuous for live loads. The specific bridge is minneapolis bridge 27b01 for van white memorial boulevard northbound over bnsf railroad tracks north of junction of dunwoody boulevard and i394.
Appendix b example problems transportation research board. Analysis and design of prestressed box girder bridge by. Prestressed concrete continuous box girder bridge design. Box girder bridges from steel box girders and steel and concrete composite box girders are used for long spans, where the self weight of the bridge needs to be minimized, and for situations where their excellent high torsional stiffness is of particular benefit. Precast, prestressed girder design example pgsuper training 242020 1. Concrete boxgirder bridge model tutorials computers and. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Example project 2 1 chapter 2 create a concrete box girder bridge this chapter demonstrates the steps that are necessary to create a bridge model using csibridge. Introduction this example illustrates new mexico department of transportation nmdot design procedures for a threespan prestressed concrete girder bridge. Prestressed concrete shall apply to the analysis and design of precast segmental box girder bridges. Behavior of the splice regions of spliced igirder bridges. 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.
Plan, elevation and section views are shown on the following pages. The concrete deck of a twingirder bridge can be reinforced up to a width of. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. 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. In addition to explaining the design steps of the design example, the comprehensive commentary goes beyond the specifics of the design example to offer guidance on different situations that may be encountered in other bridges. Lrfd design example for steel girder superstructure bridge. Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. 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. Typical spliced girder bridge configurations and representative spans a simple span.
Overview of reinforced concrete box girder bridge design capability. Bridge design manual, texas department of transportation august 2001. China electric power press continuous prestressed concrete box girder bridge design case study. Concrete boxgirder bridge model tutorials computers. Abstract a number of prestressed concrete i girder bridges built in the past several decades have demonstrated the ability of precast, prestressed spliced girder bridges to compete with structural steel plate girder bridges in the 120 ft 300 ft span. One of the example problems is based on the box girder bridge erected over the intracoastal waterway at corpus christi, texas, and is essen tially a documentation of the preliminary design procedure used in devel opment of the structure. Deck slabs without transverse posttensioning shall be designed under the applicable provisions of section 5 concrete design. Key words igirder, curved bridge, lifting, erection, construction 18. Multimedia package for lrfd concrete bridge design rosa p.
Ansys offers a comprehensive software suite that spans the entire range of physics, providing access to virtually any field of engineering simulation that a design process requires. Sap2000 watch and learn sap2000 tutorial videos sap2000. Department, sri vasavi institute of engineering and technology, andhra pradesh. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. 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. This document includes detailed flowcharts outlining the design steps for all components of. Bridge concrete design download bridge design spreadsheet. Only the design of slab bridge will be used for illustration. Design example for prestressed concrete psc girder. The example bridge model, shown in figure 21, will be used throughout this chapter to help the user understand the various steps that are necessary to build a bridge model. Organizations around the world trust ansys to deliver the best value for their engineering simulation software investment.
Pdf this research study analyzes the several positions in a box girder bridge. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. The advantage in using an allsteel configuration is that the whole cross section, including parapets, can be fabricated at the works for delivery and erection in complete spans. Posttensioned box girder bridge an analysis approach. Prestressed concrete decks are commonly used for bridges with spans between 25m and 450m and provide economic, durable and aesthetic solutions in most situations where bridges are needed. Standard aashto hl93 traffic loading is followed for the analysis of bridge prestressed concrete girder as it is widely used for the design of prestressed concrete girder bridges. Comprehensive design example for prestressed concrete girder. Title and subtitle a design procedure for intermediate external diaphragms on curved 5.
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