Rcc beam with spiral reinforcement

1. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308
(Print), ISSN 0976 – 6316(Online), Volume 5, Issue 8, August (2014), pp. 98-100 © IAEME
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING
AND TECHNOLOGY (IJCIET)
ISSN 0976 – 6308 (Print)
ISSN 0976 – 6316(Online)
Volume 5, Issue 8, August (2014), pp. 98-100
© IAEME: www.iaeme.com/ijciet.asp
Journal Impact Factor (2014): 7.9290 (Calculated by GISI)
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98
IJCIET
©IAEME
RCC BEAM WITH SPIRAL REINFORCEMENT
SIDRAMAPPA SHIVASHANKAR DHARANE
SVERI’s College of Engineering Pandharpur, Maharashtra, India
ABSTRACT
In reinforced cement concrete generally the main steel reinforcements are in use in horizontal
form. But the replacement of this form of horizontal type of main reinforcement into spiral form
leads to increase the bending moment, torsional moment, shear, ductility with reduced deflection
which consider also considers the effect of reversal of loading as per substitute frame method. This
also leads to better earthquake performance.
Keywords: RCC Beam, Spiral Reinforcement, Ductility, Earthquake Performance, Reversal of
Loading, Substitute Frame Method.
INTRODUCTION
In present theory and practice in RCC beams the main steel reinforcement is used to resist the
bending moment and to increase the ductile behavior. In addition to this the shear reinforcements are
provided perpendicular to main reinforcements to resist the shear force.
But the replacement of this type of main longitudinal and transverse shear reinforcement into
only one form leads to increase its bending moment, torsional moment, shear with reduced deflection
with enhancing better ductile behavior along with better earthquake performance. Also it takes into
account the reversal of loading as per substitute frame method.
The further strength of this type of beam can be increased by the concept of ferrocement.
To avoid the splitting of concrete at corners of square and rectangular beams the additional
small diameter bars can be used.
The spiral form for square and rectangular beams are circular and oval shaped can easily
made.
The time-dependent effects of concrete, due to creep and shrinkage, leads to a growth in
strain with its age. It causes considerable impact on the performance of concrete structures causing
an increase in deflection as well as affecting the stress distribution. Creep and shrinkage also cause
dimensional changes in the material under the influence of sustained loading.

2. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308
(Print), ISSN 0976 – 6316(Online), Volume 5, Issue 8, August (2014), pp. 98-100 © IAEME
99
RCC Beams
RCC beams structural elements are designed to carry transverse external loads that cause
bending moment, shear forces and in some cases torsion across their length. Concrete is strong in
compression and very weak in tension. Steel reinforcement is used to take up tensile stresses
in reinforced concrete beams.
The detailing of beams is normally associated with
i) Size and number (or spacing) of bars,
ii) Lap and curtailment (or bending) of bars,
iii) Development length of bars,
iv) Clear cover to the reinforcement and
v) Spacer and chair bars.
Beam is a structural member which is normally placed horizontally. It provides resistance to
bending when loads are applied on it.
Various types of materials such as wood, steel, aluminum, etc are used for making RCC
beam. Most commonly used material is RCC (Reinforced Cement Concrete).
RCC beam can be various types depending on different criteria. Such as depending on shape,
beam can be rectangular, T-beam, etc. Depending on reinforcement placement, beam can be double
reinforced beam, single reinforced beam, etc.
Types of RCC Beam
RCC beams are 4 types depending on their supporting systems.
1. Simply supported beam or simple beam
2. Semi-continuous beam
3. Continuous beam, and
4. Cantilever beam.
The explanation of each type of beam is given below –
Simple beam: This type of beam has a single span. It is supported by two supports at both ends.
Semi-continuous beam: This beam doesn't have more than two spans. And supports are not more
than three. Technically this beam is a continuous beam.
Continuous beam: This type of beam has more than two spans and has more than three supports
along its length. The supports are in one straight line thus the spans are also in a straight line.
Cantilever beam: It has only one support in one end, another end is open.

3. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308
(Print), ISSN 0976 – 6316(Online), Volume 5, Issue 8, August (2014), pp. 98-100 © IAEME
CONCLUSIONS AND SALIENT FEATURES
100
1. Increase in bending moment capacity
2. Increase in torsional moment capacity
3. Increase in shear carrying capacity
4. Reduced deflection
5. More ductile behavior
6. Better earthquake performance
7. Accounts the reversal of loading as per substitute frame method.
8. Economical
REFERENCES
1. Dharane Sidramappa Shivashankar Patil Raobahdur Yashwant, “Design and Practical
Limitations in Earthquake Resistant Structures and Feedback”, International Journal of Civil
Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online),
Volume 5, Issue 6, June (2014), pp. 89-93.
2. Sidramappa Shivashankar Dharane, “Effect of Shape of Main Reinforcement in Slabs”,
International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print)
ISSN 0976 – 6316(Online), Volume 5, Issue 8, August (2014), pp. 01-03.
3. Sidramappa Dharane Archita Malge, “Experimental Performance of Flexural Behavior of
Ferrocement Slab Under Cyclic Loading”, “International Journal of Civil Engineering And
Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online), Volume 5, Issue
3, March (2014), pp. 77-82.
4. Sidramappa Dharane Archita Malge, “Experimental Performance of Flexural Creep
Behavior of Ferrocement Slab”, IJRET: International Journal of Research in Engineering and
Technology eISSN: 2319-1163 | pISSN: 2321-7308,Volume: 03 Issue: 04 | Apr-2014,
pp 635-640.
5. Sidramappa Dharane Archita Malge, “Experimental Performance of Flexural Behavior of
Ferrocement Slab Under Gradual Loading”, International Journal of Civil, Structural,
Invironmental and Infrastructure Engineering Research and Development IJCSEIERD)
ISSN(P): 2249-6866; ISSN(E): 2249-7978, Vol. 4, Issue 2, Apr 2014, 97-102.
6. Sidramappa Dharane Archita Malge, “Civil Engineering Analysis and Design Software -
Limitations of End Users and Feedback”, International Journal of Civil, Structural,
Environmental and Infrastructure Engineering Research and Development (IJCSEIERD),
ISSN (P): 2249-6866; ISSN (E): 2249-7978 Vol. 4, Issue 4, Aug 2014, 11-12.