26-07-2014, 02:48 PM
Recent developments in fibre reinforced concrete and their
effect on concrete columns analysis
[attachment=66275]
Abstract
This paper presents the developments in Fiber Reinforced Concrete during the
past ten years and the consequent necessity of adopting a new approach in the
analysis of columns made of this new material.
Fiber Concrete is an ideal solution to the problem of steel congestion in concrete
members such as columns, for which the ductility may be highly required.
Recent investigations mainly draw attention to mechanical properties, constitutive
models and structural behavior of the concrete reinforced by steel fibers, mineral or
naturally occurring fibers.
Based on previous experimental and analytical studies available, a rectangular stress
block is proposed for analysis of Steel Fiber Reinforced Concrete Column.
Introduction
Today concrete is the number one structural material in the world. However mainly due to its
inherent tensile weakness, much of this concrete is cracked.
Research efforts aiming to improve the mechanical properties of such attractive material led to the
founding of prestressed concrete, high and ultrahigh-strength concrete.
Concrete with high strength exhibits brittleness. Therefore, Fiber Reinforced Concrete has been
suggested as alternative solution to the problem of cracking by making concrete tougher and more
ductile.
Conclusion
Traditionally, fiber reinforced -concrete has been effectively used in industrial floors to resist impact
and dynamic loads.
Analysis of recent developments in fiber reinforced- concrete shows a progressive implementation of
that structural material in concrete structures especially where high ductility is needed.
Many experimental studies concerning the use of fiber reinforced- concrete with different types of fibers
have been reported.
Problem of steel congestion can be avoided with steel fiber incorporation in the concrete matrix.
Therefore, analysis and design concepts must be modified when analyzed structure is made of fiber
reinforced -concrete. Design and analysis methods will have to be based not only on strength but also
on deformation characteristics.
Researchers have previously proposed different stress-strain relationships for fiber concrete.
It is well known that columns are very important structural members for which high level of ductility
is required, especially if they have to sustain earthquake loading.
effect on concrete columns analysis
[attachment=66275]
Abstract
This paper presents the developments in Fiber Reinforced Concrete during the
past ten years and the consequent necessity of adopting a new approach in the
analysis of columns made of this new material.
Fiber Concrete is an ideal solution to the problem of steel congestion in concrete
members such as columns, for which the ductility may be highly required.
Recent investigations mainly draw attention to mechanical properties, constitutive
models and structural behavior of the concrete reinforced by steel fibers, mineral or
naturally occurring fibers.
Based on previous experimental and analytical studies available, a rectangular stress
block is proposed for analysis of Steel Fiber Reinforced Concrete Column.
Introduction
Today concrete is the number one structural material in the world. However mainly due to its
inherent tensile weakness, much of this concrete is cracked.
Research efforts aiming to improve the mechanical properties of such attractive material led to the
founding of prestressed concrete, high and ultrahigh-strength concrete.
Concrete with high strength exhibits brittleness. Therefore, Fiber Reinforced Concrete has been
suggested as alternative solution to the problem of cracking by making concrete tougher and more
ductile.
Conclusion
Traditionally, fiber reinforced -concrete has been effectively used in industrial floors to resist impact
and dynamic loads.
Analysis of recent developments in fiber reinforced- concrete shows a progressive implementation of
that structural material in concrete structures especially where high ductility is needed.
Many experimental studies concerning the use of fiber reinforced- concrete with different types of fibers
have been reported.
Problem of steel congestion can be avoided with steel fiber incorporation in the concrete matrix.
Therefore, analysis and design concepts must be modified when analyzed structure is made of fiber
reinforced -concrete. Design and analysis methods will have to be based not only on strength but also
on deformation characteristics.
Researchers have previously proposed different stress-strain relationships for fiber concrete.
It is well known that columns are very important structural members for which high level of ductility
is required, especially if they have to sustain earthquake loading.