The deck may consist of 3 girders spaced at 2, 45 m. centres. Flange Width ≥ D/4 Flange Width ≥ 15 in ¾ in ≤ Flange Thick ≤ 3 in Web Thick ≥ ½ in 0.25D Min. 12.0 HYBRID PLATE-GIRDER SPLICE DESIGN DIFFERENCES ..... 76 13.0 ROLLED BEAM SPLICE DESIGN ..... 77 14.0 BOX GIRDER SPLICE DESIGN ..... 78 14.1 Web Splice Design ..... 78 14.2 Flange Splice Design ..... 78 15.0 REFERENCES ..... 80. iv List of Figures . ASSUMPTIONS FOR THE DESIGN OF PLATE GIRDER BRIDGES Following assumptions are made in the design of plate girder bridges: 1.The web plates of plate girders resist the shear force and the shear stress is uniformly distributed over entire cross sectional area of the web . Based on these, the summation of load effects due to different load combinations for various load factors are obtained. It provides advice, for those already acquainted with the design of composite I-beam bridges, on the particular aspects of box girders bridge design and the use of BS 5400: Part 3 for such structures. stream 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. The primary goal of the Collaboration is to achieve steel bridge design and construction of the highest quality and value through standardization of the design, fabrication, and erection processes. The load effects (such as bending moment and shear force) are to be found using individual and un-factored load cases. The example illustrates the design of a typical three-span continuous straight steel I-girder bridge with spans of 140′-0″ – 175′-0″ – 140′-0″. endobj endobj PGSuper uses a state-of-the-art iterative design algorithm and other iterative computational procedures. 7 0 obj The following report provides comprehensive analysis of the advantages and highway bridges. 2. Based on these, the summation of load effects due to different load combinations for various load factors are obtained. From the comparison, the author comes out with a design example for both design method. endobj Site location is assumed to be near Socorro, New Mexico, with the bridge crossing a waterway on a normal (perpendicular) alignment. Taking Weihe grand bridge as an engineering example, structure combination of steel-concrete joint section and detail structure design including joint section connector, longitudinal prestressed reinforcement, steel lattice are analyzed. classification early in plate girder design is important when using the LRFD Specification. endobj endobj The design codes used for this Broadcom Inc. U�Q�v`�LFлT��5ը6�yY7��W#>�/��W��g����?�`�� The example illustrates the design of a typical three-span continuous straight steel I-girder bridge with spans of 140. Crane Girder Design 5 Crane Column Cap Plates • Allow girder end rotation –avoid thick cap plates –place the bolts outside of the column flanges. � ���l�b̒�qFp��d���,/>� �y$yN8"N�� ��ձ9gΑ�}֐b>�q­t��[B�A�6�^lđ�2>`����s�F����A+�*������"��a�! 2 and 3) for the determination of flexural and shear design strength. Detailed design of main plate girders in bridges. <> Fig.1 Common types of plate girder bridge. Each This tool is carefully designed to help you easily and quickly detect plagiarism in any digital text-based content. Combined the calculation and analysis, the connection form of steel-concrete joint section of Weihe grand bridge is determined. With these flowcharts, this discussion will focus on the design of plate girders according to LRFD rules. In such cases, the designer must choose between a plate girder and a truss. 0 Box girder, rolled girder and plate girder bridges are primarily flexural structures which carry their loads by bending between the supports. The bridge deck will have no footpaths. 4 University of Kansas March 1, 2018 Engineering Conference Crane Girder Design Girder Lacing Using a truss to stabilize the top and … Thanks is expressed to the following for their assistance and comments. Loading – Single lane of Class 70-R or two lanes of Class A: Let the cross-section of the deck be assumed as shown in Fig. The comparative results of computer analysis are discussed in Chapter 7 to further clarify the advantages and distadvantages. »Ö-èAŽG€cg-eÛþûÎ%Y²M×(àRäðÍpæÍG‚¯»º|Í_jvu|­ëüå­X²ç Û~|²_Eð”¯ÊM^—ÛM0ÿ\Ô¸õW‘/‹Ýõ5›ÎnØ4‚;ÉRžÆ,{$ðO2rjf´aÙ;ÈÜÏ [Uã‘`+ú’aóy?={óìÁ7žö'‘Çüï,û{dDoSÃÃà³7qJ!¸Ž{‚.D)—=¹yéOïݗ©÷–¬æOdäÍáKyùÆ× 5 ½'’zë¼Æcíݗ. 0.75 in Min. Fig.1 Common types of plate girder bridge. Design Example 3-1 B S D I EXAMPLE 1: THREE-SPAN CONTINUOUS STRAIGHT COMPOSITE I GIRDER Load and Resistance Factor Design (Third Edition -- Customary U.S. Units) by and Michael A. Grubb, P.E. From the comparison, the author comes out with a design example for both design method. Adjacent Precast Concrete Box Beam Bridges-H. G. Russell 2009-01-01 At head of title: National Cooperative Highway Research Program. <> For example, a low clearance bridge over poor ground might use multiple main girders on a single broad pier, whereas a high level bridge of the same deck width and span over good ground might use twin main girders, with cross girders, on individual columns. The flanges of plate girders resist the bending moment. The girders are spaced at 2.5m (c/c girder). Plate girders are used in both buildings and bridges. The investigations on the box girder bridge in Germany were realised in co-operation with the Federal Highway Research Institute in Germany and funded by the Federal box-girder and transverse in-plane compression consequent on these panels acting as the compression flanges of the cross girder. 372 0 obj <>/Filter/FlateDecode/ID[<2AC8F3A789793992C8302878D4391611><8843E26BE91B6E40B314AE10CF51618B>]/Index[363 20]/Info 362 0 R/Length 69/Prev 1546972/Root 364 0 R/Size 383/Type/XRef/W[1 3 1]>>stream STL2 - Two Span Plate Girder Example Last Modified: 7/28/2016 2 The Bridge Workspace tree after … Plate girders -Dr. Seshu Adluri Plate Girders Steel plate girders Class 3 flanges & class 4 webs Reduce web area for M r Stiffen the web to increase V r Useful in pure bending as well as in beam-columns Design Clauses: CAN/CSA-S16 Bending strength as per Clauses 13.6 & 7 Shear strength as per Clause 13.4 Local buckling check: Clause 11 It is not used in Design Review analyses. 382 0 obj <>stream By using excel spreadsheet, the author compares the weight of the plate girder bridge designed using both codes as the span increases with a fixed yield strength used. 11 0 obj D 0.50 in Min. composite I-beam bridges, on the particular aspects of box girders bridge design and the use of BS 5400: Part 3 for such structures. Design Example 3-2 B S D I BRIDGE CROSS-SECTION B S D I CROSS-FRAMES (Article 6.7.4.1) “The need for diaphragms or cross-frames shall be investigated for all stages of assumed construction procedures and the final condition. Steel plate girder cross-section proportions: Web depth Section 2.2.4 of Preferred Practices Follow AASHTO LRFD Bridge Design Specifications Article 2.5.2.6.3.as a starting point for straight girders. Bridge Design to Eurocodes Worked examples Worked examples presented at the Workshop “Bridge Design to Eurocodes”, Vienna, 4-6 October 2010 Support to the implementation, harmonization and further development of the Eurocodes Y. Bouassida, E. Bouchon, P. Crespo, P. Croce, L. Davaine, S. Denton, M. Feldmann, R. Frank, limit state method of design was used for design of pier shaft. <> illustrated through the design example presented herein. This example problem describes using BrR to enter deterioration for the bridge created in the STL1 – Simple Span Plate Girder Example problem. Geometric Constraints for Straight Girders . computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. Per AASHTO, no seismic analysis is required for structures in Zone 1. For curved girders, use above and increase by 10 to 20 percent, or use LRFD equation 2.5.2.6.3-1 {j�o�`�`cd�����4�l.��h���@ ����H�F��n���3��ψLA$��;wD���]`��^֐dda�21��H�3H&�C��: ѧ�p xœWMoÛ8½ðàQ:˜"EJ”Š @'Ù. I-Shaped Plate Girders . • Do not use knee braces • Allow for adjustment in placing the crane girder. %%EOF met through the use of AASHTO LFRD Bridge Design Specifications, a series of bridge engineering handbooks, LRFD design examples from the Federal Highway Association, in addition to many other sources. This ebook is distributed in the universal PDF format. The design codes used for this Design 2.1. 8 (25M) bar through the center of the girder is bent back into the beam at top and bottom. 10 0 obj The load effects (such as bending moment and shear force) are to be found using individual and un-factored load cases. ii G13.1 Guidelines for Steel Girder Bridge Analysis PREFACE This document is a standard developed by the AASHTO/NSBA Steel Bridge Collaboration. Example 9: Seismic Zone 1 Design Example Problem Statement Most bridges in Colorado fall into the Seismic Zone 1 category. endstream endobj startxref Specifically, the example illustrates the design of selected critical sections from an exterior girder at the It is a companion to a publication giving general guidance on composite highway bridge design. It is not used in Design Review analyses. 6 Tie Back Design. Enter the following description data: Close the window by clicking Ok. The span of the girders is 23.35m(c/c brg), and the overall girder length is 24.0m. computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges. This example illustrates New Mexico Department of Transportation (NMDOT) design procedures for a three-span prestressed concrete girder bridge. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 11 0 R/Group<>/Tabs/S/StructParents 1>> It gives two worked examples, one for a multi-girder bridge and one for a ladder deck bridge. 5 0 obj https://www.researchgate.net/publication/337657813_design_of_bridge 2-1 June 2019 . endobj thick plate. Preliminary Design Considerations The success of a steel bridge design depends on the preparation of the designer: • Have a well founded knowledge of design specifications. The significance of these items can be seen in the LRFD Manual flowcharts (Figs. designing a steel plate girder bridges. Robert E. Schmidt, E.I.T. designing a steel plate girder bridges. <> h�b```f``2a`��@��(������ ��������I�%D8)��(`8���H���g��B'ndh�{Hu�b�uϘ�StK]��dÿ���O8�%��r����y��K^��X[|�B�7�WT���m���=8�ȴ��e�����-!�ƞ..n..ii��. 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). 8.2a. 1.1 RC DECK OF RC GIRDER BRIDGES The design example comprises of 5.35m wide deck with 2-girder arrangement. Dr. Chavel received is Ph.D. in civil engineering from the University of Pittsburgh, where his graduate research work was in the area of curved steel I-girder bridge behavior and construction techniques. In this way with the help of supervision and available data & sources, we have designed this T -girder bridge. Design Step 6 – Design of Bearings Prestressed Concrete Bridge Design Example Task Order DTFH61-02-T-63032 6-3 Elastomer grade is selected based on the temperature zone of the bridge location and by Table S14.7.5.2-2. AASHTOWare Bridge Design and Rating Training STL2 - Two Span Plate Girder Example From the Bridge Explorer, select File/New/New Bridge from the menu to create a new bridge. The files attached include a CSiBridge model and a detailed PDF which documents the modeling and verification procedures for a composite steel-girder bridge design based on the example published in the LRFD Design Example for Steel Girder Superstructure Bridge (FHWA NHI-04-041) by FHWA in November 2003. The previous guides referred to BS 5400 for the basis of design. 2. analysis of the slab. 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