Title:
Design of Reinforced Concrete Beams with Small Openings under Combined Loading
Author(s):
M. A. Mansur
Publication:
Structural Journal
Volume:
96
Issue:
5
Appears on pages(s):
675-682
Keywords:
beams; bending; design; reinforced concrete; shear; small openings; strength; torsion
DOI:
10.14359/720
Date:
9/1/1999
Abstract:
A method is presented for strength design of reinforced concrete beams that contain a small opening and are subjected to combined torsion, bending, and shear. The proposed method recognizes two different types of failure, labeled as beam-type and frame-type fail-ures. The design for the beam-type failure is accomplished on the basis of the familiar skew-bending theory for torsion in concrete beams. Using the Australian approach, the problem of combined loading is reduced to the usual flexural and shear design procedures. For frame-type failure, recommendations are given on the basis of available information to achieve a satisfactory design. The method is illustrated by a numerical example.