Title:
Analysis of Sections Subjected to Combined Shear and Torsion--A Theoretical Model
Author(s):
Khaldoun N. Rahal and Michael P. Collins
Publication:
Structural Journal
Volume:
92
Issue:
4
Appears on pages(s):
459-469
Keywords:
angle of twist; beams (supports); bending; bridges (structures); cracking (fracturing); deformation; reinforced concretes; shear properties; spalling; strength; torsion tests; Structural Research
DOI:
10.14359/995
Date:
7/1/1995
Abstract:
A three-dimensional behavioral truss model capable of analyzing rectangular reinforced and prestressed concrete sections subjected to combined loading is presented. This model uses the principles of the modified compression field theory (MCFT), and is capable of analyzing sections subjected to combined biaxial bending, biaxial shear, torsion, and axial load. Compatibility of curvatures is introduced to enable the model to handle combined shear and torsion, and explain nonlinearity in the shear-torsion interaction curve. The model provides a check on spalling of the concrete cover for sections subjected to combined shear and torsion. Calculated deformations and ultimate loads from the model are compared with experimental results and are shown to be in good agreement.