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  1. Imran Structural Engineer

    Horizontal Cold Joint In Post-Tensioned I Girder

    Hello, At one of our projects, there was a breakdown of concrete batching plant for about 02 hours while casting post tensioned girder (girders poured to about half of height). The contractor ignored the advice of site engineer and poured the remaining concrete without roughening the surface...
  2. Imran Structural Engineer

    Columns with uneven height in same bent

    Hi everyone I am designing bridges in a project with steep slopes. Overall topography of project is very similar to kicking horse canyon phase 4, British Columbia Canada (picture attached) Due to steep slope and to avoid cutting, both bents cannot be kept at same height. The issue that I am...
  3. Imran Structural Engineer

    Idealization of Integral Pier

    Currently I'm working on design of bridge with integral pier. Usually, for typical non-integral highway bridges with pile/column bent pier, it is practice at our office to assume K value of 1.2 in bridge's transverse direction and 2.1 in longitudinal direction (AASHTO Table C4.6.2.5-1) when...
  4. Imran Structural Engineer

    Torsional Moments in curved bridge

    How are torsional moments in curved box girder bridge calculated. Can someone provide literature ? I'm doing analysis on software but I want to calculate them manually. I've used equations from pci and aisc manual but answers do not match with software. Also, for a bridge with sharp...
  5. Imran Structural Engineer

    CSi-API Database Tables help

    thread802-478021 Hello I need help regarding CSi API. I want use database tables with, I'm doing my inputs and output correctly, yet i'm getting this error. "No method 'GetAvailableTables' with matching signature found for class 'CSiBridge1.cDatabaseTables'." even though i checked using methods...
  6. Imran Structural Engineer

    Span configuration for tall bridge in horizontal curvature

    I am planning a bridge over a waterbody. The high flood level is 15meter. I've attached images with two possible configuration, one with pier in middle with height of 28.4 meter while other configuration avoids the deepest part by 3.4m in height. There is an existing older bridge at downstream...
  7. Imran Structural Engineer

    API Syntax for composite girder

    Is there any specific syntax to get girder forces of a bridge. CSi's documentation covers beam and area element, however the composite action of the two not covered anywhere. Any sort of help and guidance will be highly appreciated.
  8. Imran Structural Engineer

    Hollow Pier for a Tall Bridge

    Can any one please suggest me at what height should I opt for a hollow pier? Currently I'm working on preliminary design of bridge with 131ft and 200ft tall piers. I made assumptions of cross section of hollow pier based on the literature in 'Bridge Engineering Handbook by Wai-Fah Chen and Lian...
  9. Imran Structural Engineer

    Single-mode Method for Seismic Design of Bridge

    Referencing from an old closed thread, Does anyone know of a weblink or site to find a pdf (preferably) of either of these two older bridge seismic guides?: (1) Guide Specification for Seismic Design of Highway Bridges, AASHTO 1983. or (2) Seismic Design Guidelines for Highway Bridges...
  10. Imran Structural Engineer

    Additional Span or Tall Abutment >12 m

    Hello! I have a query regarding Bridge Planning. Which one of the following options would be more feasible economically and structurally. Providing Tall Abutment (12 or 13 m) or instead provide 40-80 meters of additional span (Prestressed I Girder) to achieve 3-4 meters of abutment height...

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