Analysis, Design and Estimation of Basement+G+2 Residential Building
Analysis, Design and Estimation of Basement+G+2 Residential Building
Ismail Sab, Prof .S.M. Hashmi (2014): Generated 3D 4. BUILDING DATA FOR ANALYSIS
analytical model of twelve storied buildings for different
buildings Models and analyzed using structural analysis tool Salient Features
ETABS. To study the effect of infill, ground soft, bare frame
and models with ground soft having concrete core wall and Utility of Building : Residential Building
shear walls and concrete bracings at different positions
Area of the site: 70 X 60 (ft)
during earthquake; seismic analysis using both linear static,
linear dynamic (response spectrum method) has been Building Height: 47 ft
performed. The analytical model of the building includes all
important components that influence the mass, strength, Number of Storey: (BASEMENT+G+2)
stiffness and deformability of the structure [7].
Type of construction : R.C.C Framed Structure
3. METHODOLOGY
Shape of Building :Rectangular
Collection of data
Number of staircase: one
Drawing AUTOCAD
Bending Moment
Analysis
Shear Force
Slabs
Designing
Beams
Columns
Footing
Estimation
Staircase
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Step - 1: Step by Step procedure for ETABS Analysis For this go to Design menu, concrete design, select design
combo. After this again goes to design menu, concrete
The procedure carried out for Modeling and analyzing the frame design, start design \ check of structure then ETABS
structure involves the following flow chart. performs the design for every structural element.
Step - 2: Creation of Grid points & Generation of
structure 5.1 Plan of the Building
After getting opened with ETABS we select a new model and
a window appears where we had entered the grid
dimensions and story dimensions of our building. Here itself
we had generated our 3D structure by specifying the
building details in the following window.
Step - 3: Defining of property
Here we had first defined the material property by selecting
define menu, material properties. We add new material for
our structural components (beams, columns, slabs) by giving
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Step 2:
Effective span
Lx = 1.51m
Width = 1.0m
Step 3
Fig-1: Plan of the building
Load calculation
Step 4
Mu =
Step 5
5.2.1 Slabs
Slab is plate elements forming floor and roofs of =
buildings carrying distributed loads primarily by flexure.
A concrete slab is common structural element of modern Ast(req) = 313.13mm²
buildings. Horizontal slabs of steel reinforced concrete,
typically between 4 and 20 inches (100 and 500 mm)
Ast (min) =
thick, are most often used to construct floors and ceilings,
while thinner slabs are also used for exterior paving. Consider 10mm dia bar Area = 78.53mm²
Slabs may be classified into 2 types depending on ratio of
larger side to shorter side, its recommended in IS 456 to Sv(req) =
design slabs having (ly/lx) ratio greater than 2 as one way
slab and slabs having (ly/lx) less than 2 as two way slab. Providing spacing of 230mm
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Pt = Design of Beam
Step 1
fs =
Beam size 230*380 Span
Kt = 2.00
=4.20m
( Breadth b =230mm
Depth D=380mm
fck=20N/mm²
Vu =
fy=415N/mm²
=
Step 2
Mulim = 0.138*fcb*b*d²
Since = 0.138*20*0.23*(0.349)²
Step 9 = 77.32kN-m
Torsion reinforcement
Mu
Mesh size = = 0.302m Therefore design the beam as singly reinforced beam.
A= Step 3
Area of 8mm dia = 50.4mm² Area of steel reinforcement
Sv =
= 240.44mm²
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Ast(min) = Sv =
Step 6
Number of bars required =
Minimum shear reinforcement
Number of bars provided = 3 bars
Sv =
Ast provided = 3*(
Sv = 237.70mm say = 230mm
Step 4
Step 7
Check for deflection
Reinforcement
Mux = 6.6kN-m
Muy = 1.3kN-m
Fck = 25N/mm²
Since Fy = 415N/mm²
For shear design consider 2 legged stirrups of 8mm dia d’ = 40
= 66.2*10^3-0.42*230*349 = 32487N
Asv = 2* Mu = 1.15*sqrt*(Mux²+Muy²)
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= 7.74kN-m Step 5
To find Puz
Puz = 0.45*fck*Ac+0.75*fy*Asc
Asc = b*D-Asc(pro)
= 105121mm²
=0.02
Puz = 0.45*25*105121+0.75*415*678.87
P = 0.02*fck =0.02*25
= 1393.9
= 0.5
Step 6
Asc = To find αn
Asc = 529mm²
Actual p = 0.641
=(
p/fck =
0.0257 Step 7
1) b or D = 230mm
2) 16*12=190mm
3) 300mm(therefore provide 8mm dia
Mux1 = 0.015*25*230*460² bar
@190mmc/c)
= 19.102kN-m
5.2.4 Isolated Footing
Step 4
Design of Footing
Muy = 0.5*wu*L*(
Step 1
Muy = 0.5*257.11*3.20*(
Column size 230*460
Muy = 193.0kN-m
Factored load on footing =pu=1316.4kN
Step 5
Working load on footing =
Effective depth required
Assume self weight of footing
Dreq = sqrt(
=
Wu =
Step 4
Check for one way shear Since The design is safe against two way shear.
Since
Step 8
Vu = wu*(A-((D+d)*(B+b))
= 257.1((320*1.60)-
(0.46*0.60)*(0.23*0.6)) Vu = 1090.2kN bo
= perimeter = 2*(D+d)+2*(b+d) =
Fig-3: Staircase Plan
2*(0.46+0.6)+2*(0.23+0.6) bo = 3.78m
Design of Staircase
Nominal stress
Floor height = 3m fck
= 25N/mm² fy =
500N/mm²
= 0.25*sqrt(20) Step 1
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Depth of waist slab is assumed as = = 202.75= D = 200mm Bending moment and shear force width = 1.250mm
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Ast =
Distribution bars are of 8mm dia @200mmc/c.
Sv = = 200mm 6. ESTIMATION
Total = 47.88KN.
Step 3
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Estimation is Done by Centre Line Method RUPEES ONE CRORE TWENTY NINE LAKHS NINTY
ONE THOUSAND ONLY.
Basement
STOREY INR (Rs)
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Basement
Fig-11-: Bending Moment Values of First Floor Fig-12-: Bending Moment Values of Second Floor
Terrace
Second Floor
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REFERENCES
Fig-13-: Bending Moment Values of Terrace [3] M. Mallikarjun, Dr. P M V Surya Prakash, Analysis and
Design of a Multistoried Residential Building of
8. CONCLUSIONS (ung2+G+10) By Using Most Economical Column Method,
International Journal of Science Engineering and Advance
From the analysis and design of the slabs and beams Technology, Volume No: 4, Issue No 2.
it was found that the check for deflection and shear
was safe. [4] V. Varalakshmi, G. Shivakumar, R. Sunil Sharma,
The Columns were designed using SP-16 and was Analysis and design of G+5 Residential Building, IOSJR
checked for interaction formula and was found to Journal of Mechanical and Civil Engineering, Pp 73-77.
be safe.
The footing were designed and checked for one way [5] P.P. Chandurkar, Dr. P.S. Pajgade, Seismic Analysis of
shear and two way shear was found to be safe and RCC Building With and Without Shear Wall, IJMER,
the load was found to be less the safe bearing Volume No: 3, Issue No: 3, Pp 1805-1810.
capacity of the soil.
[6] Chaitanya Kumar. J. D, Lute Venkat, Analysis of
In the present scenario, a structural engineer
Multistoried Building With Precast Load Bearing walls,
cannot afford to generate the results manually as it
involves tedious procedures and complicated International Journal of civil and structural
calculations, which requires considerable time and engineering, Volume: 4, No: 3, 2013.
patience. Thus there is always a need of a simpler
alternative like the use of various; Computer Aided [7] Ismail Sab, Prof S. M. Hashmi, Lateral Load
Software’s which would offer great flexibility and Analysis of Shear Wall and Concrete Braced
efficiency. Multi-Storied R.C Frame With the Effect of
In this project, analysis and design of structure was Ground Soft Storey, Volume: 2, Issue: 9, 2014.
done with the aid of software called ETABS which is
quiet feasible in using and offers more efficient [8] Bureau of Indian Standards: IS 456:2000, Plain and
designs and flexibility. Reinforced Concrete Code of Practise (Fourth
Using software’s helps to get faster results and Revision), NEW DELHI.
simultaneously designing can also be done for that
[9] Bureau of Indian Standards: IS-875 (part 1)-1987, Code
members.
of Practice for Design Loads (Other Than Earthquake)
Different load combination can be applied easily. for Buildings And Structures, (Part 1)Dead Loads —
Load combination can be altered easily. unit weights of building materials and stored materials
Time is saved for structural design work, so that ( second revision ), NEW DELHI.
work can start very quickly.
We can conclude that there is a difference between [10] Bureau of Indian Standards: IS-875 (part 2)-1987,
the theoretical and practical work done as the scope Code of Practice for Design Loads (Other Than
of understanding will be much more when practical Earthquake) for Buildings And Structures, (Part 2)
work is done as we get more knowledge in such a Imposed Loads ( second revision ), NEW DELHI.
situation where we have great experience doing the
practical work. [11] Bureau of Indian Standards: SP 16- 1980, Design
ETABS gives more economical and convenient Aids for Reinforced concrete to IS 456-1978, NEW
results than manual design results. DELHI.
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International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056
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BIOGRAPHIES
Prof. R. D. Deshpande,
Department of civil engineering,
KLS Gogte Institute of Technology,
Belagavi, Karnataka, India.
Mr. N. Pawan,
Department of civil engineering,
KLS Gogte Institute of Technology,
Belagavi, Karnataka, India
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