Civil Engineering Reference
In-Depth Information
Chapter 1
Introduction
1.1 Outline
Research on shear in reinforced concrete has been carried out for about a century,
so there are many published papers in existence related to this subject.
With the arrival on the market of new materials, such as Fiber Reinforced
Concrete (FRC), studies began to focus on the shear behavior of elements made of
this material.
The present thesis tries to shed some new light on the shear behavior of FRC
elements by means of a thorough analysis of the most important studies in order to
detect any de
ciencies or issues that have not yet been examined.
Many researchers have presented new formulas for evaluating shear resistance
and have compared them with others already in existence.
This thesis does not propose a new formula to add to the already long list, but the
objective is to verify the reliability of the current codes by means of comparing
experimental tests.
One of the issues dealt with was to verify the in
fl
uence of
fl
ange size on shear
and whether to include the
ange factor in the design formulas (it appears in one
shear formulation for FRC elements, but not in those for non-
fl
ber elements).
Tests were also performed on beams made of concrete of different compressive
strengths and
ber reinforcements (quantity and quality) to study their in
fl
uence on
shear, including the size effect.
Finally, FRC hollow core slabs were produced to achieve the bene
bers
under shear forces, due to the impossibility of including transverse reinforcement in
this type of slab.
ts of
Search WWH ::
Custom Search