Title:
Torsion Design Example: Prestressed Concrete Girder Bridge
Author(s):
Kevin S. Benítez C. and Eva O. L. Lantsoght
Publication:
Symposium Paper
Volume:
344
Issue:
Appears on pages(s):
149-167
Keywords:
box girder bridges; prestressed concrete; shear; torsion
DOI:
10.14359/51728295
Date:
10/1/2020
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.