الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
In spite of the great development in the field of construction, very little
information exists on the behavior of RC beams with web opening under the effect
of torsional moments. The objective or this research work is to shed lights on the
behavior of reinforced concrete beams with web openings and to give
recommendations on the position and detai ling of reinforcement around these
openings under the effect of torsional moments.
To achieve the objectives eight reinforced concrete beams specimens were
designed, casted and experimentally tested under flexure and torsion monotonically
increasing moments. The main variables were width to depth ratio of the reinforced
concrete beams, opening length, opening height, and torsion reinforcement ratio.
The tested specimens were six reinforced concrete beams with varied web
opening sizes and varied beam widths, one reinforced concrete beam without web
opening and one reinforced concrete beam without vertical stirrups. These specimens were subjected to torsional and flexural moments increasing to failure.
During testing, rotation, deflection, strains in concrete, main reinforcement, and
shear reinforcement were monitored. Further, cracking behavior and failure loads
were observed.
Results show that web opening dramatically affected the torsional capacity of
reinforced concrete beams. Effect of web opening height was more pronounced
than that of the web opening length. The additional reinforcement detailing and
intensity around the web opening significantly affect torsional capacity of
reinforced concrete beams. The research assessed the applicability of current local
and international codes to the design of beams with web openings in the light of the
experimental test results. Finally, the research provided recommendations and
guidelines that help the design engineer detail reinforced concrete beams with web
openIngs.