Torsion Design Example

Prestressed Concrete Girder Bridge

Conference paper (2020)

Authors

Kevin S. Benítez C. Politecnico di Milano

E.O.L. Lantsoght Universidad San Francisco de Quito, Concrete Structures - , ADSTREN

Research Group

Concrete Structures () (TU Delft)

Torsion Shear Prestressed concrete Box girder bridges

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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Concrete Structures

Abstract

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.

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