Optimization of Circular RC Frame Structure by Using Shear Wall at a Different Location in the Structure: A Review

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 09 Issue: 04 | Apr 2022 www.irjet.net p-ISSN: 2395-0072
© 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 749
Optimization of Circular RC Frame Structure by Using Shear Wall at a
Different Location in the Structure: A Review
1M.Tech, Civil Engineering, Suyash Institute of Information Technology, Gorakhpur, Uttar Pradesh
2Assistant Professor, Civil Engineering, Suyash Institute of Information Technology, Gorakhpur, Uttar Pradesh
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Abstract - In this review article, we look at the many forms
of RCC buildings, such as H, L, T, rectangular, andothershapes,
as well as the varied positions of shear walls, such as shear
walls on the building's outside, inner, and center walls. The
majority of RCC structures are assessed using the Etabs and
SAP2000 software, but certain RCC structures are studied
using the Staad-Pro program. We know that advanced RCC
constructions such as slanted buildings, box-shapedbuildings,
and circular form buildings are built presently. The primary
goal of putting the shear wall in a different location in the
strictures is to see which position of the shear wall in the
structure is more stable than another. The IS code 1893 part-
1:2002 is used to examine the majority of the papers in the
literature review.
Key Words: Dynamic Analysis,Shear Wall,CircularBuilding,
Seismic Analysis, and Optimization.
1. INTRODUCTION
The primary notion behind adopting a circle shape building
is that, as we all know, the aerodynamic impact of a circular
shape building is smaller than that of other shapes. We give
the circular shape at the top of the building to lessen the
influence of the wind when we create a high-rise structure
since the effect of the wind is large at the top of the building.
The circular has several advantages, including lower
embodied energy, increased energy efficiency, earthquake
and wind resistance, and lower cost. The circular building's
figure-1 is as follows:
Fig -1: Circular Shape Building.
There are two types of a circular building which is given
below:
Circular Building with Courtyards: Thereisopenspace
inside the circular building in this sort of structure, which
can be utilized for parking or other purposes. The Apple
Company's headquarters are in California,hencethisstyle of
the structure was built there. The Circular building with a
courtyard is depicted in Figure-2, which is a plan of the
circular shape of the structure.
Fig -2: Circular Shape Building with Courtyard
There is an inner courtyard, which is an open space, as seen
in the diagram above.
Circular Building without Courtyards
There is no courtyard in this style of circular structure (no
open space inside the circular). The biggest disadvantage of
this style of circular structure is that there is no open area
within it that can be used for parking. The following is a
diagram of the Circular Building without Courtyards:
Shahid Khan1, Sandhya Sahani2

Fig -3: Circular Shape Building without Courtyard
In the above figure you can see there is no open space inside
the circular building.
1.1 Shear Wall
A shear wall is a structural element that resists lateral
pressures, or forces that are parallel to the wall's plane. The
Shear wall resists loads owing to Cantilever Action on
narrow walls where bending deformation is greater. Shear
walls, in other terms, are vertical componentsofa horizontal
force-resisting structure. The shear wall runs the length of
the structure, from the ground to the top, with no gaps in
between. The shear wall is seen in Figure 4 below:
Fig -4: Shear Wall
1.2 Location of Shear Walls in a Building
The shear wall's form and plannedlocationhavea significant
impact on the structure's behavior. The shear walls should
be placed in the middle of each half of the structure from a
structural standpoint. However, because it controls the use
of space, this is rarely practicable, thus they are placedatthe
ends.
In the short direction, the design and position of the walls
provide adequate flexural stiffness, but in the long direction,
the rigidity of the frame is required.
Fig -5: Location of Shear Wall
2. LITERATURE REVIEW
After studying the paper related to the shear wall in the
different shapes of RC frame structure there is the following
conclusion given below:
[1]Shaikh et al [2013] These authors study "Seismic
Analysis of Vertically Irregular Buildings," and the model of
the building in this paper is a setback building, with the
conclusion that "Three-dimensional analysis of a building
using general-purpose analysiscomputerprogramscantake
care of the displacement but without displaying its
magnitude." However, because there is no direct technique
to compute the centre of rigidity or shear centre for each
floor/storey of a structure, there is no general-purpose
computer programme that can account for design deflection
and base shear. Deflection is also a crucial component
contributing to substantial damage or entire collapse of
structures, according to several studies of structural
damages during historical wind storms and earthquakes. As
a result, irregular structures must be thoroughly examined
for deflection. Soft storey-The greatest choice for all-new RC
frame structures is to prevent such abrupt and substantial
decreases in stiffness and/or strengthinanystorey;it would
be excellent to instal walls (either masonry or RC walls) in
the ground storey as well. Designerscanpreventtheharmful
impacts of the flexible and weak ground storey by not
discontinuing too many walls in the ground storey, i.e., the
decline in stiffness and strength in the ground storey level is
not abrupt owing to the lack of infill walls. Existing open
ground-level structuresmustbeadequatelyfortifiedtoavoid
falling during severe earthquake shaking.
[2]Bajarang [2015] The title of this author's article is
"Study of Different Shear Wall Locations on Seismic
Performance of RCC Framed Buildings," and the research
concludes that, among all loadcombinations,1.5DL+1.5EQis
shown to be the most crucial combination in both the X and
Y directions for all models. For constructions in earthquake-
prone locations, the zigzag shear wall layout is the most
effective. Structures in earthquake-pronelocationshavealso

been proven to benefit from a diagonal shear wall layout.
Because zigzag shear walls reduce lateral displacement and
storey drift more than other forms of shear walls, they
improve the structure's strength and stiffness.
[3]Mohaiminul, Sourabh [2016] This author's paper is
titled "Seismic Performance Analysis of RCC Multi-Story
Buildings with Plan Irregularity," and the conclusion is that,
based on the analysis of various-shaped multi-story
buildings, all structures meet displacement criteria for
equivalent static analysis, even though Model-1 just touches
the allowable limit curve. Model-1deflection wasfoundto be
more than 80% higher than Model-4. Storey drift indexes
rise with floor height until the third storey when they hit
their maximum and begin to fall for all four types. For all of
the Models, the displacements derived from thetimehistory
analysis are substantially greater than the permitted limit.
Because the weights of the structures are comparable, the
differences in displacement values across the models are
minimal. The greatest displacement for all of the structures
exceeds the allowed limit, according to the response
spectrum study. These results, however, are significantly
lower than those found from time history analysis. In lower
levels, the difference in displacement values between the
four forms is negligible, but it grows in higher stories and
peaks at the top floors. Thedisplacementofirregular-shaped
structures (Model-1 and Model-2) is larger than that of
regular-shaped buildings (Model-3 and Model-4).Asa result
of the total research, it can be stated that buildings with
irregular plan shapes are more vulnerable to earthquake
load than regular-shaped ones.
[4]Anju [2017] the paper written by this author is
“seismic analysis of irregular RCframebuildingswithspecial
columns” and the conclusion is given below:
For models considering plan irregularity only
When compared to models with Tee and Cross-shaped
columns, the lateral displacement and story drift for the H
shape model with L shape columns were lower. When
compared to models with L and Cross-shaped columns, the
lateral displacement and story drift for both L and Tee
models with Tee-shaped columns were lower.
For models considering both plan and stiffness
irregularity
When compared to models with Tee and L-shaped columns,
the lateral displacement and story drift for H shape models
with a Cross-shaped column were lower. Whencompared to
models with Cross and L-shaped columns, the lateral
displacement and story driftsforbothL andTee modelswith
Tee-shaped columns were lower.
[5]Sanisha et al [2017] The title of this author'sresearch
are "Seismic Analysis of Multi-Story Building with Shear
Walls of Different Shapes." The dynamic analysis of the
building was the first component of the study. The base
shear and storey drift (the relative displacement between
the two floors) were determined. A comparison table of
these data for all shear wall forms has also been provided.
The study's findings are reported in the next section. Based
on the base shear value and storey drift In both zones V and
III, the G+14 building with W and U-shaped shear walls
performs better (X-direction). In zones, V and III, a G+14
structure with an H-shaped shear wall performs well in
terms of storey drift (Y-direction). In zones II and III, the
bG+14 structure with a T-shapedshearwall performswell in
terms of base shear (Y-direction). Based on the base shear
value and storey drift In both zones V and III, the G+29
building with W and H-shaped shear walls performs better
(in both X and Y directions). In zones, V and III, a G+29
structure with a T-shaped shear wall performs well in terms
of story drift and base shear value (both X and Y directions).
In both zones, the improved form of the shear Wall is
unchanged.
[6]Yaseen et al [2018] The authors' study "Seismic
Behavior of Circular Buildings with Mass Irregularity"
concludes that when the heavy mass transfers upwards, the
values of storey displacement and storey drift rise. The
position of heavy mass in the building has little impact on
the base shear. In buildings with vertical mass irregularity,
the base shear values are significantly higher. Because more
mass equals stronger inertia forces, lighter structures may
withstand earthquake shaking better.
[7] Wang et al [2022] The major components that resisted
the lateral force were the web plate and concrete. Between
55 per cent and 85 percent of the overall shearingresistance
of the wall is attributed to the web plate. The vertical force
was mostly resisted by the corner of the wall, whereas the
shear force was mostly resisted by the rest of the wall. The
stiffened plates divide the concrete into multiple columns,
each of which is independent and resists vertical strain.
Increases in wall thickness, steel ratio, axial compression
ratio, and channel length-to-width ratio improve elastic
stiffness and ultimate strength capacity. With a rising shear
span ratio, elastic stiffnessandultimatestrengthcapacityare
diminished. Steel ratio, shear span ratio, axial compression
ratio, and the length-to-width ratio of the channel are all
factors that influence CWSC ductility. The steel ratio and
shear span ratio have a favorable impact on ductility,butthe
axial compression ratio and the length-to-width ratio of the
channel have a negative effect. The ultimate strength
capacity, yielding bearing capacity, elastic stiffness, and
secant stiffness of the composite shear wall's yield point are
all evaluated using formulas.Theformulaeinthisstudywere
more accurate than the formulas in specifications in
predictingultimatestrength capacity.Meanwhile,themodels
performed well in other tests from the literature in
predicting ultimate strength capability. The formulaecan be
used to create engineering designs.

3. CONCLUSION
After reading numerous research articles on my issue, I've
arrived at the following findings on the varying placements
of the shear wall in various building shapes: If we are
creating a circular structure in a limited space, it will be
extremely difficult to create because we will be unable to
offer the circular beam (curved beam),butifthearea iswide,
we will be able to simply construct the curved beam. When
the width of the curved beam is increased, the deflection
values for the rectangular cross-section rise at the same
time. If the width remains constant but the breadth grows,
the deflection values change in decimal units but are
equivalent. When the dead load of the beam is considered,
the deflection in the circular cross-section of the rounded
beam is smaller than the deflection in the rectangular cross-
section of the curved beam. When a circular building is used
instead of a rectangular or regular form building, the cost of
the structure is reduced by 15% to 18%.
REFERENCES
[1] G. Mathiyazhagan “Finite Element Analysis on Curved
Beams of Various Sections” 2013.
[2] Shaikh A. Aijaj, G.S. Deshmukh “Seismic Analysis of
Vertically Irregular Building” 2013,
(https://sites.google.com/site/researchjournalofsrtmu).
[3] Philip Steadman “Architectural Doughnuts: Circular-
Plan Buildings, with and without Courtyards” Nexus
Netw J (2015) 17:759–783, DOI 10.1007/s00004-015-
0270-8.
[4] Mohaiminul Haque, Sourav Ray “Seismic Performance
Analysis of RCC Multi-Storied Buildings with Plan
Irregularity” 2016; 4(2): 52-57, DOI:
10.11648/j.ajce.20160403.11.
[5] Anju Nayas “seismic analysis of irregular RC frame
buildings with special columns” Volume 4, Issue 6, June -
2017, International Journal of Advance Engineering and
Research Development.
[6] Sanisha Santhosh “Seismic Analysis of Multi Storied
Building with Shear Walls of Different Shapes” Vol. 6
Issue 06, June – 2017, International Journal of
Engineering Research & Technology (IJERT).
[7] Yaseen Tarique, Vijayalaxmi Gajare“Seismic Behaviorof
Circular Building with Mass Irregularity” Volume: 05
Issue: 05 | May-2018, IRJET.
[8] Lovneesh Sharma, Sandeep Nasier “Dynamic Seismic
Evaluation of Irregular Multi-Storey Buildings Using
Bracing in Zone V as Per Is: 1893-2016” ISSN: 2278-
3075, Volume-8 Issue-7, May, 2019, (IJITEE).
[9] Om Prakash Mahato, M. Anil Kumar “Study on Effect of
Geometry on RC Multistory Building under Seismic
Load” ISSN: 2277-3878, Volume-7, Issue-6C2, April
2019, (IJRTE).

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Optimization of Circular RC Frame Structure by Using Shear Wall at a Different Location in the Structure: A Review