A New Reinforced Concrete Beam
Author(s)
N. M. Elbasha
Abstract
The introduction of high strength concrete and steel reduces the size of structural
members whilst having the same load carrying capacity and a resultant saving on
construction time, material, labour and space. Therefore, using both high
strength steel and high strength concrete in construction is very important for
producing a lightweight structure.
High strength concrete (HSC) and high strength steel are used together to
increase a beam’s load capacity and reduce its cross section. Using these two
materials to design over-reinforced beams will reduce the size, weight and costs,
which is a desirable result, but because they lack ductility, the current codes of
practice disallow their use. This study shows that ductility can be significantly
improved by installing helical confinement in the compression zone.
In the last 20 years there has been extensive research to economically utilize
new components to improve the quality of HSC. HSC produces smaller but
stronger structural elements with large spaces available. This proved that
structures constructed with HSC are lighter and economical compared with those
constructed with normal strength concrete (NSC).
This study presents recent information on the benefits of HSC and also
provides, in brief, experimental proof that installing a helix with a suitable pitch
and diameter in the compression zone of beams significantly enhances their
strength and ductility. Therefore designers could confidently use HSC and
helical confinement to design long and lightweight (by reducing the beam size)
reinforced concrete beams.
Keywords: lightweight structures, reinforced concrete beams, high strength
concrete, helical confinement.
Keywords
lightweight structures, reinforced concrete beams, high strength
concrete, helical confinement.
Related Book
Other papers in this volume
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