الفهرس 
REVIEW OF PREVIOUS RESEARCHOnly 14 pages are availabe for public view
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Abstract
The pt~esent
t~esearch is concerned with
the
behaviour of box beams with openings in either the webs or
in the lower flange • The effect of varying
the opening
location
in the longitudinal or transversal directions on
the box behaviour
is studied
Also the effect of
symmetrical and
d r at or-t Lon a I
loading is studied. The
research objective
is to find the best location of
openings in webs or lower flange that has the least effect
on deflections and stresses. It aims al~o to overcome the
pr-oblem of
concentrated stt~esses and excessive
deformations arising
from certain openings location
Openings
flanges
located near the junction lines between webs and
in unstiffened box beams
have shown a
dangerous effect on deformations and stresses • Special
treatment is needed for such openings •