BE Magazine - Volume 5, Issue 1 - (Page 26) CIVIL w RITES designed a new railway bridge in harmony with the Victorian-era bridge it will replace a location for the new bridge. RITES submitted its project report in 1990, in which the firm recommended the new bridge be located 25 meters downstream from the existing bridge. RITES was subsequently engaged to carry out additional detailed studies and design, taking into account development in the built-up area around the approaches and the river hydraulics. Eastern Railways requested w A first for an Indian railway, the bridge features three spans that the profile of the superin a continuous superstructure structure of the New Jubilee Bridge coexist with the existing bridge, which will be preserved and declared a historical landmark. Used for the first time on an Indian railway, the RITES design incorporates a 415.6-meter three-span railway bridge with a continuous superstructure (13.65 meters by 150 meters by 132.65 meters). The substructure includes twin circular piers on a large-diameter deep caisson double D-shaped well foundation. The bridge’s superstructure is conceived as a trussed arch that follows the bending moment profile. The two planes of the truss are placed 12.1 meters apart to provide two broad-gauge railway lines at the bottom level of the superstructure. The truss planes are connected together through cross girders and lateral bracings at the top, bottom, and middle levels. PROJECT OVERVIEW Design of New Jubilee Bridge Organization RITES Ltd. BE Awards Category Civil Structural Analysis, Design, and Documentation Project Objective Design a bridge superstructure that coexists with existing heritage bridge 3D analysis support commands to study the effects of rigid connection. Stringer to cross-girder connections must be flexible so that inbuilt stresses and longitudinal stresses are minimized, so stringers were released for longitudinal forces at one end to minimize the effect of longitudinal movement and maximize flexibility. A RITES project manager noted, “Just 10 years ago, it would have been nearly impossible to compare different profiles of the Jubilee Bridge configuration, but using STAAD.Pro enabled RITES to handle the task with a team of less design engineers.” Engineers also used the customizable report-generation tools of STAAD.Pro to generate final submissions, which were proofchecked and submitted to the client well within the time scheduled. RITES will save man months in design time by using STAAD.Pro. The New Jubilee Bridge is currently under construction, with an estimated cost of $30 million. It is expected to be commissioned by 2010. CIVIL NEWS FROM BENTLEY Bentley Releases ProjectWise Lifecycle Server 8.9.3 Edition >>more The superstructure weighs 6,000 tons and contains more than 11,000 members. RITES used STAAD.Pro to create a 3D beam model of the superstructure and MXRAIL for design of the alignment. RITES used the 3D models to analyze the effects of various loads, with the entire design and analysis carried out in accordance with prevailing code provisions. In the preliminary design stage, the truss arch design was optimized so that stress flows in a controlled manner. The graphical output of STAAD.Pro helped perform this task effectively. The solution also helped engineers calculate secondary stresses, eliminating the need to prestress the members. The input/output graphics of STAAD.Pro proved immensely helpful during this process. For example, the effects of rigid and semirigid joints were analyzed for stress relief to the bottom floor system. The bracing system and joints were modeled using user-defined Bentley Ships All-New StormCAD, No. 1 Hydraulic Modeling Solution for Stormwater Networks >>more Share Your Best Practices Nominate your project by Feb. 29 to be part of this year’s BE Awards of Excellence community of technological innovators! Project submissions are now open to all Bentley users. This year’s BE Awards program boasts some notable improvements: added incentives, new categories, and a simplified submission process. Finalists and winners will be recognized at BE Conference 2008 in Baltimore, Md., on May 28–30. Submit your compelling project now! 26 BE MAGAZINE | Volume 5, Issue 1 http://www.bentley.com/en-US/Corporate/News/Quarter+4/PLCS.htm http://www.bentley.com/en-US/Corporate/News/Quarter+4/StormCAD.htm ftp://ftp2.bentley.com/dist/collateral/Web/BEAwards08/2008_BE_Awards_Benefits.pdf ftp://ftp2.bentley.com/dist/collateral/Web/BEAwards08/Categories_Criteria_BEAWARDS2008.pdf ftp://ftp2.bentley.com/dist/collateral/Web/BEAwards08/Submission_Process_Tutorial_BEAWARDS2008.pps
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