Impact of lrfd specifications on design of texas bridges. Leap bridge enterprise saves time for prestressed concrete box girder bridges. 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. Freyermuth design research section portland cement association skokie, illinois continuous highway bridges with precast, prestressed girders have been built by a number of states. This type of bridge provides benefits of rapid construction, and improved structural performance. Report date october 2002 steel trapezoidal box girder bridges 6. This manual is intended to better communicate the intent of the plans, standard specifications for state road and bridge construction, special provisions, and project special. Wisdot bridge manual chapter 19 prestressed concrete january 2020 193 19. For simply supported spans, this limit is generally found to be nearly 10 metres and for continuous or balanced cantilever type. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. An image of a model taken from the sap2000 bridge examples document is. Optimal design of a posttensioned box girder is achievable by correct selection of design variables.
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. 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. This document primarily discusses common steel girder bridge types. The examples cover the principal steps in the verification of the. 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. About this design example description this document provides guidance for the design of cfcc prestressed precast concrete beams according to aash to lrfd bridge design specifications with the neccessary ammendmets where applicable, based on av ailable literature and ex perimental data from tests conducted by grace et. Kansas department of transportation bridge construction manual version 1011 kdot bridge section 1. A box girder bridge is an apparent bridge sector in which main beams contain girders in the hollow box shape. Strength of concrete pacific nw aggregates have consistently resulted in concrete strengths, which may. Chapter 1 presents a brief history of the use of the bridge type and describes the basic components of a box girder superstructure.
The bridge will be 740 m long, a sevenspan continuous rigid frame box girder bridge made of prestressed reinforced concrete. 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. Optimization of posttensioned box girder bridges with. Examples of bridges of this type built by the states of tennessee and. 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. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. Posttensioned box girder design manual now available. Bulb tee bridge bridge section view girder elevation view givens girder span length, l 100 ft. The hollow box girder bridge is admirably suited to these conditions and has the additional advantage of its aesthetically pleasing lines, a highly desirably property for urban structures. Highway division iowa department of transportation. In these cases, straight steel box girders are used in regions where the clear span requirements preclude the use of the concrete ubeams. Apr 26, 2012 the design of the kanawha river bridge in west virginia is used to illustrate these topics. Substitution of cip conventional concrete in the contract document with shotcrete requires the. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples.
Design of continuous highway bridges with precast, prestressed concrete girders clifford l. This tutorial is based on the bridge specifications of the federal highway administrations steel bridge design handbook design example 2a. Structures design office lrfd design examples files pdfs. Csibridge 04 design of precast concrete composite girder bridges. This publication presents worked examples of the detailed design of two composite highway bridges. Precast options for bridge superstructure design john r. The following design steps are included in this example. Measured behavior of a curved precast segmental concrete. 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. Csibridge 04 design of precast concrete composite girder. The proposed method has been tested with the experimental testing of a. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 41 design step 4 deck slab design design step 4.
While the design examples consider box girders of constant depth. Box culvert is a usually default buried structure type that serves a variety of purposes. Design of prestressed concrete girder bridge request pdf. Figure 5 walnut lane bridge, philadelphia, historic american engineering record haer photo. 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. Concrete boxgirder bridge model tutorials computers. 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.
Aug 31, 2016 csibridge 04 design of precast concrete composite girder bridges watch learn youtube murat feyzifar. Deflection probability and bayesian updating by zdenek p. Design new reinforced concrete culverts and extensions to existing culverts are subjected to either earth fill andor highway vehicle loading in accordance with the aashto lrfd bridge design specifications. The first goal was accomplished by development of guidelines.
Customary aashtopciasbi segmental box girder standards for spanbyspan and balanced cantilever construction december, 1997, metric units including the following. This is in the range of standard overhangs for closed box and ibeam bridges. Concrete bridge lrfd specifications parsons brinckerhoff page 1 1. Strutandtie model design example for hammerhead pier. Design of box girder bridges free download as pdf file. Key words steel, box girders, trapezoidal, torsional 18.
Prestressed box girders and general prestressed concrete guidelines are also included in this chapter. Leap bridge concrete is design and analysis software for concrete bridges of all types. Aug 31, 2016 csibridge design allows for quick and easy design and retrofitting of steel and concrete bridges. Wisdot bridge manual chapter 19 prestressed concrete. Analysis and design of post tensioned box girder bridge.
This example uses the option of specifying shims at the bearing seats in lieu of accounting for girder over. In this thesis analysis and design of prestressed concrete bridges deck slab, t girder and box girder are carried out using irc. Then the 1,400ton, 103mlong box girder was lifted successfully from the yangtze river to its final place with strand jacks. Analysis and design of prestressed box girder bridge by irc. However, some authors define beam bridges slightly differently from girder bridges. Pdf analysis and design of prestressed concrete box. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance with the design provisions of aci 31811, and is consistent with the format of sp1709. Twospan continuous straight composite steel i girder bridge. Design guide for composite box girder bridges steelconstruction. Click onto the tutorial or example in the table below to connect to the relevant web page. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140.
Concrete boxgirder bridge model tutorials computers and. Posttensioned box girder bridge an analysis approach using. Introduction box girders have become a prominent element in the con. The two most common types of modern steel girder bridge are plate and box. Key words prestressed concrete, lrfd, design, bridge girders. This documentary photo, taken in 1968, shows the walnut lane bridge span, comprised of a parallel series of prestressed, posttensioned concrete beams, aligned closely together.
Design step 2 example bridge prestressed concrete bridge design example haunch depth 4 in. Analysis and design of prestressed concrete box girder bridge. The term girder is often used interchangeably with beam in reference to bridge design. 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. Want concrete bridge design software that does it all. For the love of physics walter lewin may 16, 2011 duration. Learn how to model, analyze, and design check reinforced concrete culvert bridge. Pci bridge design manual 3rd edition, first release. A computer spreadsheet application was specifically developed for this investigation. The various analysis nuances that can affect the results of a steel bridge analysis, and the implications of variations in the results of a steel bridge analysis.
Precast is utilized to construct both the superstructure and substructures of all types of bridges. The simple prestressed concrete box girder has evolved rapidly into the sophisticated bridge with many more design and construction developments. 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 compared. Bridge design to eurocodes worked examples worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010. The box is typically rectangular or trapezoidal in crosssection. The first example is of multi girder form, the second is of ladderdeck form. 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.
Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. After reading this article you will learn about the design of slab and girder bridges. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. Steel bridge design had not been standardized each bridge was an original design that requires time and money, whereas concrete bridges are standardized designs the sssba developed standard simplespan and modular designs espan140 short span steel bridge design. In addition to general design guidance and information on detailing practices, this section contains three design examples. In this paper, cost optimization approach of a posttensioned pc i girder bridge system is presented. As the span increases, the optimum form of construction changes to voided slab or beam and slab then box girder bridges. Appendix b example problems transportation research board. In this project work the prestressed concrete girder bridge, already. The behavior of box girder section for a general case of an eccentric load has been. Horizontally curved concrete boxgirder highway bridges appendix b example problems table of contents example b1 comprehensive design example b5 spine and grillage analysis 1.
Box girder types bridge building bridges of dublin. Identification of prestress force in prestressed concrete box girder bridges using vibration based techniques iv common feature of all types of box girder bridges so that the proposed method can be extended to all types of box girder bridges. A basic introduction to the design codes and methods of anlysis. 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.
New fhwa posttensioned box girder design manual aspire bridge. Reinforced concrete bridges theory and design of bridges. Introduction this example illustrates new mexico department of transportation nmdot design procedures for a threespan prestressed concrete girder bridge. The research was performed to develop guidelines for design and construction and to address issues that significantly influence performance. Whether steel or concrete were used on a bridge depended very much on the availability of the material locally.
Design of steel elements is covered in part 3 and of concrete elements in part 4. Analysis and design of prestressed concrete igirder bridge. Used in cip post tensioned concrete box girder construction, deep bridge. Design guidelines for steel trapezoidal box girder systems. Design of box girder bridges bending beam structure scribd. 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 box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. Design of reinforced concrete bridges ice manual of. Box type concrete bridge in csibridge 2017 youtube. Concrete bridge design, analysis software leap bridge. Overview of reinforcedconcrete boxgirder bridgedesign capability.
Pgsuper uses a stateoftheart iterative design algorithm and other iterative computational procedures. Bridge related software national concrete bridge council. This research study analyzes the several positions in a box girder bridge where. Box girder bridge deflections american concrete institute. During project work considerable efforts have been endured upon analysis and design of prestressed concrete girder bridge. Design of prestressed concrete igirder bridge superstructure. The design process and corresponding calculations for steel igirders are the focus of this example, with particular emphasis placed on illustration of the optional moment redistribution procedures. Analysis and design of prestressed box girder bridge by.
The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials, fabrica. Only the design of slab bridge will be used for illustration. The design and optimization of segmentally precast. 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. A girder bridge is a bridge that uses girders as the means of supporting its deck. Simple and continuous precastprestressed, spliced girder, and castinplace posttensioned concrete box girder bridge superstructures and reinforced concrete bridge substructure analysis and design programs, according to both aashto standard and lrfd specifications. Title and subtitle a design procedure for intermediate external diaphragms on curved 5. Precast concrete box culvert will be used in this design tutorial. Analysis and design of prestressed concrete i girder bridge shubham landge1, umesh bhagat2, shubham bhaisare3.
Posttensioning tendon anchorages in concrete segmental bridges, as commonly detailed, are difficult to access for inspection by nondestructive. Chapter 5 concrete structures page 52 wsdot bridge design manual m 2350. 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. It is capable of analysis, design, and cost evaluation of the superstructure for a castinplace posttensioned box girder bridge. The fhwa posttensioned box girder design manual was developed for engineers who have limited exposure to the design and construction of prestressed concrete bridges. Design of reinforced concrete bridges department of civil. 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. Introduction the gunkaigawa bridge will be located 3 km east of the toyotahigashi junction on the new tomei expressway. The design and analysis of the simply supported box girder bridge is performed by using csi bridges and sap 2000 finite element software according to eurocode en 19912, 2003 5 and the egyptian code of practice ecp 201, 20123. Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. North water diversion canal workers to total chengxing feng line continuous prestressed concrete box girder bridge. Prestressed concrete continuous box girder bridge design. Steel bridge tutorials computers and structures, inc. Design of concrete structures shall be based on the requirements and guidance cited.
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