Torsion Design Example: Prestressed Concrete Girder Bridge

Kevin S. Benítez C., E.O.L. Lantsoght

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

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The design of a cast-in-place, post-tensioned concrete, multi-cell box girder bridge under combined torsion, shear, and flexure is presented in this example. The bridge covers three spans of different lengths, supported by two abutments and two bents; its cross-section consists of three 12 ft (3.7 m) lanes, two 10 ft (3.0 m) shoulders, and two concrete barriers. The detailed procedure for the design based on ACI 318-14 is presented, and a comparison is done with the design results for: AASHTO LRFD 2017, EN 1992-1-1:2004, and MC-2010. With this example, the authors illustrate the differences between provisions of the aforementioned codes for design of torsional effects, outlining the different theories and approaches used for each of these.
Original languageEnglish
Title of host publicationExamples for the Design of Reinforced and Prestressed Concrete Members Under Torsion
EditorsEva Lantsoght, Gary Greene, Abdeldjelil Belarbi
PublisherAmerican Concrete Institute
Number of pages19
ISBN (Print)978-1-64195-114-2
Publication statusPublished - 2020
EventACI Virtual Concrete Convention - Virtual conference
Duration: 25 Oct 202029 Oct 2020

Publication series

NameACI Special Publication
ISSN (Print)0193-2527


ConferenceACI Virtual Concrete Convention
Internet address

Bibliographical note

Accepted Author Manuscript


  • box girder bridges
  • prestressed concrete
  • shear
  • torsion


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