Title:
Torsion in Concrete Deep Beams With an Opening
Author(s):
Ali A. Akhtaruzzaman and Abul Hasnat
Publication:
Structural Journal
Volume:
86
Issue:
1
Appears on pages(s):
20-25
Keywords:
beams (supports); concretes; cracking (fracturing); deep beams; openings; span-depth ratio; strength; torsion; Structural Research
DOI:
10.14359/2617
Date:
1/1/1989
Abstract:
Twenty-six concrete deep beams with and without a transverse opening were tested to failure under torsion. The variables were span-depth ratio, concrete strength, and size and location of the opening. The presence of an opening significantly reduced torsional strength. For span-depth ratios greater than 3.0, the torsional strength of beams remained practically constant. It increased significantly, however, as span-depth ratio decreased. The crack inclinations on the beam surfaces followed a similar trend and were also influenced by concrete strength and opening size. A modification has been suggested to the strength equations of Mansur and Hasnat for shallow beams under torsion to include the effect of span-depth ratio for deep beams.