While the design examples consider box girders of constant depth. This example illustrates the design of a single span castcastinplace posttensioned concrete box girder bridge. Use ltype abutments with expansion joints at the bridge ends where bridge. Box culvert is a usually default buried structure type that serves a variety of purposes. The document also includes instructional commentary based on the aashtolrfd. The bridge has a 160 feet span with a 15 degree skew. Design step 5 design of superstructure prestressed concrete.
T or igirder 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. Pdf construction of precast segmental box girder bridge. Concrete bridges semiintegral design is used for prestressed concrete girder bridges under 450 feet long and for posttensioned spliced concrete girder and castinplace posttensioned concrete box girder bridges under 400 feet long. 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.
A design example followed by a load rating analysis illustrates the engineering computations performed by pgsuper. The design and optimization of segmentally precast. This document consists of a comprehensive design example of a prestressed concrete girder bridge. Wisdot bridge manual chapter 19 prestressed concrete. Design step 5 design of superstructure prestressed concrete bridge design example task order dtfh6102t63032 547 design step 5. Site location is assumed to be near socorro, new mexico, with the bridge crossing a waterway on a normal. Transverse design of adjacent precast prestressed concrete. The disadvantage is that box girders are more expensive to fabricate than plate girders of the same weight and they require more time and effort to design. An image of a model taken from the sap2000 bridge examples document is shown in figure 1.
Key words i girder, curved bridge, lifting, erection, construction 18. Pci bridge design manual 3rd edition, first release. Sidebyside box girder bridge bridge section view girder elevation view givens. Design of concrete structures shall be based on the requirements and guidance cited herein and in the current aashto lrfd bridge design specifications lrfd, aashto. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 43 for this example, a slab thickness of 8 in.
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. Introduction this example illustrates new mexico department of transportation nmdot design procedures for a threespan prestressed concrete girder bridge. All box culverts require a bridge office prepared plan as well. This tutorial is based on the bridge specifications of the federal highway administrations steel bridge design handbook design example 2a. T or igirder bridges are the most common example under this category and are very. The following design steps are included in this example. Only the design of slab bridge will be used for illustration. Analysis and design of prestressed box girder bridge by. The integral wearing surface is considered in the weight calculations. Pdf analysis and design of prestressed concrete box girder.
Comprehensive design example for prestressed concrete girder. Design guide for composite box girder bridges steelconstruction. Box girders were very popular in the late 1960s, but, following the collapse of four bridges, the merrison committee published design rules in 1972 which imposed complicated design rules. Transverse design of adjacent precast prestressed concrete box. The substructure consists of integral end abutments and a multicolumn intermediate bent. Overview of reinforcedconcrete boxgirder bridgedesign capability. Texas u54 girder using both the aashto standard specifications and aashto lrfd specifications were also developed and compared. Twospan castinplace posttensioned concrete box girder bridge. Steel box girder bridgesdesign guides and methods aisc. Analysis and design of prestressed box girder bridge by irc. Two design examples of a simply supported slab bridge and a twospan box girder bridge are also presented. Posttensioned box girder bridge an analysis approach using.
Pci has developed preliminary design charts in accordance with 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. Csibridge 04 design of precast concrete composite girder bridges watch learn. The example illustrates the design of a typical threespan continuous straight steel igirder bridge with spans of 140. Girder bridges are the most natural and simplest form of bridging between two points. Key words prestressed concrete, lrfd, design, bridge girders, u54 girder, type iv girder, type c girder, parametric study 18. Concrete boxgirder bridge model tutorials computers and. Foreword to first edition this guide is the fourth in a series of complementary design guides for composite highway bridges. Assumed weighted average deck thickness for dl, davg,dl 5. Feb 07, 2011 learn about the csibridge bridge analysis, design and rating program. 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.
The use of segmental concrete box girder was chosen as the flexible system and appropriate. Pgsuper uses a stateoftheart iterative design algorithm and other iterative computational procedures. 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. Impact of lrfd specifications on design of texas bridges. Bharil, in innovative bridge design handbook, 2016. May 12, 2015 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 concrete box girder bridge free download as pdf file. Box shapes 187k, pdf deck bulbtees 164k, pdf double tee bridge beams 157k, pdf next bridge beams 104k, pdf pci zone 6 curved spliced girders 1. Concrete bridge lrfd specifications parsons brinckerhoff page 1 1. Standard adot 32inch fshape barriers will be used resulting in a bridge configuration of 15 barrier, 120 outside. Pdf study on the behavior of box girder bridge researchgate. 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.
Buried structures carry vertical loads through a combination of internal. Design of reinforced concrete bridges department of civil. In addition to general design guidance and information on detailing practices, this section contains three design examples. 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. 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 pipes and box culverts, precast concrete arches, precast threesided structures, and longspan corrugated steel structures are used as buried structures. Color logos black only logos reverse logos bridge design manual 3rd edition, first release, november 2011 mnl311 1st edition, first printing, 1997 2nd edition, first printing, 2003. This example illustrates the design of a two span castinplace posttensioned concrete box girder bridge. Wisdot bridge manual chapter 19 prestressed concrete january 2020 197 19. New road segmental bridge have been built near the city of zilina, aligned on european highway corridor.
Design of steel elements is covered in part 3 and of concrete elements in part 4. In this thesis analysis and design of prestressed concrete bridges deck slab, t girder and box girder are carried out using irc. The design combines the performance require ments for a japanese bridge with the simplicity of american construction practices. Comprehensive design example for prestressed concrete. Precast, pretensioned concrete box girder bridge system for simple short span. Lrfd example 1 1span cipptcbgb 1span castinplace castin. The superstructure consists of two simple spans made continuous for live loads. Analysis and design of prestressed concrete box girder bridge.
Chances are very high that today, a bridge engineer will learn how to design a bridge girder before any other bridge type. Twospan continuous straight composite steel i girder bridge. Csibridge 04 design of precast concrete composite girder. 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. Pdf analysis and design of prestressed concrete box.
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