الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Transverse openings in beams for the passage of utility duct and
pipes minimize the story height of a building resulting in a significant
savings in material and construction costs. Several investigations have
been carried out on reinforced concrete and prestressed concrete beams
with web openings under the effect of bending, shear and torsion stresses.
The inelastic behaviour of reinforced concrete (I) beams with web
openings under the effect of bending, shear and torsion stresses don’t
have, as yet, received adequate research attention.This research work was therefore carried out on reinforced
concrete (I) beams containing transverse openings under combined action of bending, shear and torsion stresses from zero up to the failure load. A
comparison was done between the behaviour of the beams which have
web openings of variable heights with another solid one.The experimental phases of This research work were consisting of
testing four reinforced concrete (1) beams, of medium scale direct model
under the effect of two concentrated centric/eccentric loads, acting at
distances equal to 0.3 L from the supports.In the theoretical phase of this research work, the tested
specimens were analyzed using a finite element computer programme
taking into consideration the nonlinear behaviour of steel and concrete.The results of the experimental and theoretical investigation,
including cracking, crack propagation, deflections and strains of steel and
concrete were presented, discussed and compared.Finally, the results of this experimental-theoretical study were
combined with other available information to formulate some
recommendations for the analysis, design and economy of this type of
structures.
Key words: reinforced concrete,(1) beams, web openings, finite element,
nonlinear, cracking.