Us20070056123a1 construction method for psc girder. Segmental and stage construction of prestressed concrete box girder bridges gerald h. The torsional properties of the closed section are often advantageous in reducing and simplifying the support arrangements and are particularly useful when curvature in plan is required. It may also be prefabricated in a fabrication yard, then transported and installed using cranes. 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. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. Multicell psc box girder design has been performed at various locations along the span so. The charts can be accessed in preliminary lrfd design charts which you can download below. A box girder is formed when two web plates are joined by a common flange at both the top and the bottom. Pdf study on behaviour of skew psc box girder bridge. There are 2 ways in which the tapered sections can be modeled in midas civil. 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. There is a need for further study of the relative advantages in economy for both box girder and possible alternate structural systems.
Design report select the desired uls and sls enter the partial factors flexure design torsional design shear design. Laju kottalil abstract the concept of ushaped bridge girder is now being increasingly adopted in urban metro rail projects and for replacing old bridges where there is a constraint on vertical clearance. Drawing labels, details, and other text information extracted from the cad file. The box is typically rectangular or trapezoidal in crosssection.
For more detail result and other design items, the detail analysis was carried out. Therefore, this creep and shrinkage research is necessary to determine the stress distribution in the box girder bridge. Loading of irc classa is applied and analysis is done using irc 112 2011. The torsional properties of the closed section are often advantageous in reducing and simplifying the support arrangements and are. In this case analysis is done using staad pro software. Box girder bridges may be cast in place using falsework supports, removed after completion, or in sections in case of a segmental bridge. Wisdot bridge manual chapter 19 prestressed concrete. Posttensioned box girder bridge an analysis approach. It concludes that the design of psc multicell box girder performed is found to be an. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. Prestressed tendons system in a box girder bridge 7. Design of medium span highway bridge system requires careful selection of structural element in preliminary stage. Girder analysis and design is performed using the computer. Design of posttensioned girder anchorage zones by w.
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. The psc girder, where prestress is applied to the lower portion of the center of the girder by the first tense, is spanned between piers, and the second tense is performed. 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. Csibridge modular software has been used for carrying out analysis. The precast concrete box girder segments have pretensioned top slabs, 7. This requirement, along with other requirements for fixing alignment of the. Elremaily construction technology laboratories, inc. The present invention relates to a construction method for simple bridges or continuous bridges using prestressed concrete girder psc girder and precast slabs psc slabs. Several large thinwebbed box girders, with posttensioned anchorage zones designed in accordance with aashto and aci requirements, have experienced large cracks along the tendon path in the anchorage zones at the design stressing load.
Each tutorial includes module files and step by step guidelines so you can improve your midas civil skills via completing a small project. In the present work, analysis and design of box girder has been done, consideringtwo different sheathing pipes namely hdpe and corrugated bright metal pipes. The use of prestressed concrete for medium span structures has increased dramatically over the last decade, and now is the predominant material of. 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.
Comprehensive design example for prestressed 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. During the past decade, there has been extensive use of steel box girders for straight and curved highway and transit structures. May 04, 2012 this video shows the analysis of psc box girder bridges. 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. Deflection probability and bayesian updating by zdenek p. Construction of box girder bridges specifications, uses. 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. Download free bridge design and analysis spreadsheets. The girder can be modeled as frame, plate and solid elements.
Designconstruction of precast segmental elevated metro. This publication provides guidance on the design of composite box girder bridges. Pci has developed preliminary design charts in accordance with the aashto. The bridging activity is as old as human civilization. The motive behind present study is to prepare some useful interface for preliminary design of bridge system. All departmental psc girder drawings shall provide the casting yards with all the required project specific information in an easy to understand format on a succinct set of drawings, supplemented only by the general arrangements, general notes and specifications. Box girder section concrete bridges dwg section for autocad.
Analysis and design of prestressed box girder bridge by irc. Pci bridge design manual 3rd edition, first release. Other than that, to develop a spreadsheet for the design of presstressed box girder bridges using balance cantilever method based on eurocode 2 to reduce working time. The behavior of box girder section for a general case of an. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Us20070056123a1 construction method for psc girder bridges. Psc box girder design aashto lrfd free download as pdf file. Long span prestressed concrete bridges of segmental. Effect of skew angle in u girder metro karthika k a, dr. This girder will be used not only on the upcoming stage 2 of the sky train but.
Though box girder design is more complicated, it has wide acceptance due to their structural efficiency. Proposed and method presentation of bridge model updating. Design of a longterm monitoring system for a psc continuous boxgirder bridge p. Calculation of deflection, reaction, bending moments, shear force and stresses etc. Specification 1041 i erection of precast prestressed.
Lrfd design example for steel girder superstructure bridge. Psc box girder design aashto lrfd strength of materials. Specification 1041 i erection of precast prestressed concrete. Determining the variation in deflection values, bending moment values, shear force values of the models at different location on the bridge. Design of medium span highway bridge system requires careful selection of structural element. In this work, an attempt was made to comparative study the different shapes of psc box girder multi cell bridge using csi bridge v2017. Design of bridge and calculation of reinforcements. Box girder section concrete bridges dwg section for.
This video shows the analysis of psc box girder bridges. Extend bearing stiffeners the full height of the girder. Box girder sanket patel umang parekh pg student assistant professor. Box girders require more complex analysis and design than simple ibeams. Design guide for composite box girder bridges steelconstruction.
Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary task order dtfh6102t63032 us customary units submitted to the federal highway administration prepared by modjeski and masters, inc. Section ii, psc igirder, principal stresses, shear and. Design guide for civil final2 simulsoft ingenieros. The aims of this project is to develop a series procedure of box girder bridge using cantilever method design based on prestressed concrete design procedure. These sheathing pipes have been used to find the economic solution of design of multicell. Solutions to these problems are discussed with particular reference to several large prestressed concrete box girder bridges recently constructed in australia. Aashto lrfd bridge design specifications, fifth edition with 2011 interim revisions. Introduction midas civil prestressed concrete with fcm bridge balanced cantilever fcm bridge. 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. Pdf comparative study of psc box girder multi cell 3cell. Analysis and design of prestressed box girder bridge by. The thickness of the web shall not be less than d36 plus twice the clear cover to the reinforcement plus diameter of the duct hole whered. Grillage model and line beam model of psc i girder and box girder section properties are calculated for both the girders and assigned to respected beams modelled in staad pro.
Posttensioned box girder bridge an analysis approach using. Posttensioned box girder bridge can be eliminated in continuousspan, castinplace box girders by utilizing monolithic connections between the bridge superstructures and the piers, which in turn eliminate the bearing assemblies maintenance problems. The first goal was accomplished by development of guidelines for design, construction, and geometry control based on successful methodology. The wolf girder, the first major use of a precast open box girder in arizona, was developed to meet a specific need on the sky train project and has performed as well as expected, blending structural efficiency and stability with an aesthetically pleasing form. Composite box girder construction offers an attractive and economic form of construction for medium span highway bridges. International journal of bridge engineering ijbe, vol. Comprehensive design example for prestressed concrete psc girder superstructure bridge with commentary task order dtfh6102t63032 us customary units submitted to the federal highway administration prepared.
Computerised design of boxgirder bridge using balanced. Shear design was checked for an assumed stirrup layout using the aashto lrfd general procedure. The psc girder, where prestress is applied to the lower portion of the center of the girder by the first tense, is spanned between piers, and the second tense is performed during the psc slabs are put on the psc girders. The closed cell which is formed has a much greater torsional stiffness and strength than an open section and it is this feature which is the usual reason for choosing a box girder configuration. Innumerable bridges of various kinds and of various materials have been built from times immemorial. Prestressed box girders and general prestressed concrete guidelines are also included in this chapter. Analysis and design of multi cell posttensioned psc box girder. Various trial designs were performed considering both an exterior and the first interior beam. Introduction a girder bridge can be defined as a crossing the road. Probabilistic prediction of the confidence limits on longtime deflec tions and internal forces of prestressed concrete segmental boxgirder bridges is developed. Psc value sections uk code db ukm, uksy, ukty, uktye.
To study the behavior of psc box girder bridge with irc loadings at various locations of the girder. Box girder sanket patel umang parekh pg student assistant professor department of structural engineering department of structural engineering l. After reading this article you will learn about the design of slab and girder bridges. Design guide for composite box girder bridges composite box girder construction offers an attractive and economic form of construction for medium span highway bridges. Span range is more for box bridge girder as compare to tbeam girder. Pdf analysis and design of multi cell posttensioned psc. Comparative study on i girder and box girder for design of. Analysis and design of prestressed concrete igirder bridge irjet. For a closed structure, such as this box girder, the sound radiation from the inner surfaces is contained within the structure. Modelling of psci beam girder in staad pro v8i version 5. Transverse analysis of psc box girder in cablestayed. When tension flanges of longitudinal girders are connected together, the resulting structure is called a box girder bridge. The superstructure design includes the following elements. Specifications for fabrication of precast prestressed concrete girders specifications for lateral stressing and miscellaneous grouting 3.
Operational modal analysis, data normalization and structural modification assessment, mech. Stress distributions of psc box girder bridge due to creep shrinkage. Posttensioned psc box girder bridge using fcm as per. Post tensioned psc box girder bridge using balanced cantilever method fcm as per eurocode duration. Download free bridge design and analysis spreadsheets essential for bridge engineering. Effect of skew angle in ugirder metro karthika k a, dr. Another method of box girder bridge construction is the incremental launching. How to carry out design for psc box girder as per irc. Analysis and design of prestressed concrete igirder bridge. On the left is an open girder consisting of a deck plate and two webs, while on the right a box girder is shown which is closed by a bottom plate and also by plates at either end. Grillage model and line beam model of psc i girder and box girder. Girder analysis and design is performed using the computer program. Comprehensive design example for prestressed concrete girder. 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.
Brameld, queensland institute of technology, brisbane, queensland, australia. 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. For spread closed box, ibeam, and bulbtee type cross sections, a standard overhang of 3. The psc bridge wizard is a robust and easy method of making the tapered sections in midas civil. All aashto load cases are shown in the lower lefthand box. Design of a single cell rcc box girder bridge youtube. The electrified metro trains have up to four cars and operate at a design speed of 70 kmhr 43 mileshr. Study on horizontal curved bridge state of art literature. 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. Posttensioned psc box girder bridge using fcm as per eurocode. This application was carried out for checking the capability of psc box girder in the transverse direction under the preliminary design step. This is a bridge design drawing using 4 cells box girder normally reinforced. Introduction box girders have become a prominent element in the con.