The aim of this work is to demonstrate the role that slabs plays in
RC high-rise buildings. This study shows the mistakes may be
done by modeling slabs as rigid diaphragms. Then after, the
rehabilitation ability of these systems can be more accurate.
Slabs are considered one of the most exposed elements to disasters and deformities
that can be clear to the viewer. These deformities are reflected as sign of defects that
appear clearly on big slabs. So, here comes the importance of applying and d
esigning
accurate slabs.
The purpose of this research is stating the need for persistent efforts to get a better
form of the slabs in order to increase their ability to be able to carry any outside extra
weights without the appearance of any deformities that might take place during the period
of investing the building. When deformities happen, they have bad effect on the beauty
and main function (purpose) of the building.
This research includes an experimental study for the real applicable slabs under our
supervision, in addition to a theoretical study about the deflection appearing on the slabs
by taking into consideration the plastic specifications of the concrete and the formation of
cracks.
This research aims at constructing reflexive deflections in the slabs during the
construction period and measuring the actual deformities and watching them through a
period of time, then comparing them with the theoretical expected deformities.
The findings that we could get at the end of our research are supposed to play a main
role in choosing the best design for the mandate slabs and at the same time getting the best
value for the reflexive deflection that can be used in the slab to make it better functionally
and to increase its ability to resist the outside applied weights. We hope this is just a start
for more research in this field.
This research aims to introduce a new effective method to analyze and
solve thin slabs that are exposed to heat flux in full over one surface,
whereas the other surface is exposed to heat exchange with the
surrounding.
A new equation was introduc
ed by the author in order to find heat
distribution against the depth of the slab. The new equation is based on
Lablace equations with consideration to heat exchange with the
surrounds. It was found out that when heat exchange reaches zero
(insulated), then the new equation is conformed to other equations in
different references.
Consequently, the coefficient of linear expansion of slab material (α) was
put to function at temperature α(T). Therefore, the deflections of
circular and rectangular simple support slabs were found. Hence, and
according to this, bending moment, shear force and torsional moments
could be found for these slabs.
