e-ISSN (O): 2348-4470

Scientific Journal of Impact Factor (SJIF): 5.71

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International Journal of Advance Engineering and Research

Development
Applications of Nanotechnology In Civil Engineering-2019.
Volume 6, Special Issue 01, Feb.-2019.

OPTIMIZATION OF G + 7 STOREYED RCC BUILDING WITH DIFFERENT

POSITIONING OF SHEARWALL
Renie Bhavsar 1,Mittal Rathva2, Srushti Bhatt3, Dishant Prajapati4
1,2,3
UG student, Applied Mechanics and Structural Engineering Department, Faculty of Technology & Engineering, The
M.S. University of Baroda, Vadodara, Gujarat, India
4
Assistant Professor, Applied Mechanics and Structural Engineering Department, Faculty of Technology & Engineering,
The M.S. University of Baroda, Vadodara, Gujarat, India

Abstract —A study has been carried out to determine the optimum Structural configuration of a multistory building by
changing the shear wall locations. Four different cases, one without shear wall and other three with different positioning
of shear wall for a 7 storeyed residential building have been analyzed and designed as a space frame system by
computer application software, subjected to lateral and gravity loading in accordance with IS provisions. In this study
the aim is to analyze the response of structure using static method. Base shear, maximum story displacement, story
stiffness, reinforcement in corner column and story drift are observed and compared for all cases. These analyses are
done using ETABS.

Keywords-Shear walls location, Earthquake loading, Design configuration, Static Analysis, ETABS etc.

I. INTRODUCTION

Shear wall is a structural member used to resist lateral forces i.e. parallel to the plane of the wall. For
slender walls where the bending deformation is more, Shear wall resists the loads due to Cantilever Action. In other
words, Shear walls are vertical elements of the horizontal force resisting system.The shear wall is a structural element
which is used to resist earthquake forces. Shear wall is plate like slender structure having large value of stiffness, which
resist lateral load in their own plane and also resist the gravity load. Shear wall arrangement must be absolutely accurate,
if not, we will find negative effect instead. Reinforced concrete (RC) buildings often have vertical plate-like RC walls
called Shear Wall in addition to slabs, beams and columns. These walls generally start at foundation level and are
continuous throughout the building height. Their thickness can be as low as 150mm, or as high as 400mm in high rise
buildings. Shear walls are usually provided along both length and width of buildings. Shear walls are like vertically-
oriented wide beams that carry earthquake loads downwards to the foundation.

1.1 Importance of Shear Walls in RC Buildings

 It significantly reduce story displacement, story drift

 Reduces the time period of vibration of the building
 Reduces moments and induced torsion during earthquake
 Increase stiffness of the building
 Shear walls should be strong enough to provide required lateral strength to resist lateral loads in multi storeyed
buildings.
 Shear walls should also provide lateral stiffness to reduce side sway of the roof or floor above.
 Buildings provided with shear wall usually suffer from less nonstructural damage as shear wall will impart stiffness to
the building.

1.2 Ductile Design and overall geometry of shear wall

 Just like reinforced concrete (RC) beams and columns, RC shear walls also perform much better if designed to be
ductile. Overall geometric proportions of the wall, types and amount of reinforcement, and connection with remaining
elements in the building help in improving the ductility of walls. The Indian Standard Ductile Detailing Code for RC
members (IS:13920-2016) provides special design guidelines for ductile detailing of shear walls.
 Shear walls are oblong in cross-section, i.e., one dimension of the cross-section is much larger than the other. While
rectangular cross-section is common, L- and U-shaped sections are also used. Thin-walled hollow RC shafts around
the elevator core of buildings also act as shear walls, and should be taken advantage of to resist earthquake forces.

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ANTE -2019, Volume 6, Special Issue 01, Feb.-2019.

II. OBJECTIVE

 To study the behaviour of building by providing the different orientation of shear wall.
 To compare the design output of building with shear wall to building without shear wall.
 To compare the results under seismic load for different shape of shear wall.
 To compare different parameters such as Base shear, story displacement, Story stiffness and reinforcement in column
at base for models without shear wall and with shear wall placed at different positions.

III. METHEDOLOGY

Table: 3.1 Material Properties

SR .NO MATERIAL GRADE
1. Concrete(beam, column) M20

2. Concrete (slab) M20

3. Reinforcing bar HYSD-500

Table: 3.2 Seismic Data

1. Earthquake zone III

2. Damping ratio 5%

3. Importance factor 1

4. Type of soil Medium soil

5. Response reduction factor 5

6. Time period (x) .52

7. Time period (y) .59

Table: 3.3 Load Details

SR.NO LOAD TYPE ELEMENT VALUE
1. Dead load
Self-weight of Slab 3.125KN/m2
Floor finish 1KN/m2
Partition wall load 6.375KN/m
Parapet wall 2.5KN/m
Sunk load 3.25KN/m2
Water tank load 16.5KN/m2
2. Live load
Entire floor 2KN/m2
Balcony,Staircase,Passage 3KN/m2

3.1 Load combinations

1) 1.5(D.L+L.L)
2) 1.2(DL+LL±Ex)
3) 1.2(D.L+L.L±Ey)
4) 1.5(D.L±Ex)
5) 1.5(D.L±Ey)
6) 0.9D.l±1.5Ex
7) 0.9D.L±1.5Ey

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 International Journal of Advance Engineering and Research Development (IJAERD)
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Figure 1 Architectural Layout

Figure 2. Model 1 without shear wall

Figure 3. Model 2 with shear wall (+ shape)

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 International Journal of Advance Engineering and Research Development (IJAERD)
ANTE -2019, Volume 6, Special Issue 01, Feb.-2019.

Figure 4. Model 3 with shear wall (L shape)

Figure 5. Model 4 with shear wall (I shape)

IV. RESULT AND DISCUSSION

Table 4.1 Amount of steel in column C15

Arrangement of shear wall % steel in C15 Ast(mm2) in C15
Without shear wall 2.49 5612
+ shape 0.8 1800
L shape 0.8 1800
I shape 1.87 4198

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 International Journal of Advance Engineering and Research Development (IJAERD)
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Figure 6. Comparison of Area of steel reinforceent

Table 4.2 Base shear

Arrangement of shear wall EQX(kN) EQY(kN)
Without shear wall 1359 1253
+ shape 1390 1281
L shape 1400 1290
I shape 1388 1280

Figure 7.Comparison of Base shear

Table 4.3 Maximum storey displacement

Arrangement of shear wall EQX(mm) EQY(mm)
Without shear wall 36.11 22.69
+ shape 17.70 18.61
L shape 28.44 17.28
I shape 36.10 14.81

Figure 8. Comparison of Max. Storey Displacement (mm)

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 International Journal of Advance Engineering and Research Development (IJAERD)
ANTE -2019, Volume 6, Special Issue 01, Feb.-2019.

Table 3.4 Story stiffness (story 2)

Arrangement of shear wall EQX(kN/m) EQY(kN/m)
Without shearwall 327728 449097
+ shape 722971 516565
L shape 391696 579063
I shape 324056 868221

Figure 9. Comparison of Max. Storey Displacement(kN/m)

Table 3.5 Story drift

Arrangement of shear wall EQX(mm) EQY(mm)

Without shearwall 7.8 4.53
+ shape 2.517 3.036

L shape 4.5 2.835

I shape 8.1 1.92

Figure 10. Comparison of Storey Drift (mm)

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 International Journal of Advance Engineering and Research Development (IJAERD)
ANTE -2019, Volume 6, Special Issue 01, Feb.-2019.

V. CONCLUSION

 We conclude that % steel in a column C15 is less in bildings provided with shear wall as compared to that in model
without shear wall. We get less % steel in + and L shape model as compared to I shape model.
 Base shear will increase if we provide shear wall as stiffness of building will increase. The Base shear for EQX case
is highest in L shape model as compared to + and I shape models.
 We conclude that story displacement will decrease in building with shear wall as compared to the building without
shear wall.In “I” shape model displacement along X direction remains same as it is not effective in that direction but
we get minimum story displacement along Y direction in this case.Along X direction we get minimum story
displacement in + shape model .
 Story stiffness will increase in building provided with shear wall as compared to that without shear wall.We have
compared story stiffness at story 2 and we observed maximum stiffness in + shape model for X direction and that for
Y direction we get it maximum in I shape model.
 Story drift will decrease in building provided with shear wall as compared to that without shear wall.Story drift is
minimum in X direction for + shape model and in Y direction for I shape model.
 From the above results we can conclude that a building with shear wall is better as compared to that without shear
wall in resisting lateral loads.
 Also the effectiveness of shear wall will depend on orientation of shear wall.In this case ‘+’ shape is better as
compared to other two shapes.

VI. REFERENCES

[1] IS 456:2000,Indian Standard code of practice for plain and reinforced Concrete, Bureau of Indian Standards, New
Delhi
[2] IS 1893 (PART 1):2016,Criteria for Earthquake resistant design of structures
[3] IS 13920 : 2016,Ductile detailing of reinforced concrete structures subjected to seismic force
[4] IS 875 :1987 ,Code of practice for design loads for buildings and structures(other than earthquake)
[5] Ehsan Salimi Firoozabad, Dr. K. Rama Mohan Rao, Bahador Bagheri, Effect of Shear Wall Configuration on
Seismic Performance of Building, Proc. of Int. Conf. on Advances in Civil Engineering 2012
[6] Shahzad Jamil Sardar and Umesh. N. Karadi, International Journal of Innovative Research in Science,Engineering
and Technology, Vol. 2, Issue 9, September 2013
[7] . Wen-I Liao, JianxiaZhong, C.C. Lin, Y.L. Mo and Chin-HsiungLoh, Experimental Studies Of High Seismic
Performance Shear Walls, 13th World Conference on Earthquake Engineering(2004).
[8] Najma Nainan, Alice T V, Dynamic Response Of Seismo resistant BuildingFrames,International Journal of
Engineering Science and Technology (IJEST) ISSN : 0975-5462 Vol. 4 No.05 ,May 2012
[9] Mr.K.LovaRaju, Dr.K.V.G.D.Balaji, Effective location of shear wall on performance of building frame subjected to
earthquake load, International Advanced Research Journal in Science, Engineering and Technology, ISSN 2394-
1588 Vol. 2, Issue 1, January 2015
[10] Varsha R. Harne, Comparative Study of Strength of RC Shear Wall at Different Location on Multi-storied
Residential Building, International Journal of Civil Engineering Research.ISSN 2278-3652 Volume 5, Number 4
(2014), pp. 391- 400

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