1. MALNAD COLLEGE OF ENGINEERING, HASSAN
(An Autonomous Institution under VTU, Belagavi)
DEPARTMENT OF CIVIL ENGINEERING
ANALSIS OF RESIDENTIAL BUILDING USING ETABS – MINI PROJECT
Course coordinator: Mrs .Siri Hemanth,
Asst. Professor
Dept. Of Civil Engg.
Presented by,
Group 25
U S N: 4MC18CV038,
4MC18CV005,
4MC18CV069,
4MC18CV052
Date: 6/7/2021
3. INTRODUTION
The term building in civil engineering is used to mean a structure having
various components like foundation, walls, columns, floors, doors, windows,
ventilator, stairs lifts, various types of surface finishes etc according to national
building codes of India, building are classified into number of groups that are
residential buildings, educational building, institutional building, assembly
building, business building, industrial building, storage building.
4. Structural analysis is a branch which involves determination of behavior of structures
in order to predict the responses of real structures such as buildings, bridges, trusses
etc, with economy, elegance, serviceability and durability of structure.
A multistoried building is basically framed structure. In a multistoried frame all
members are continuous. Hence multistoried structure is the solution for the growing
business needs in cities where economical construction is possible.
The earthquake forces are distributed effectively as the whole structure behaves as
one unit.
5. ABSTRACT
The engineering design process is a methodical series of steps that engineers
use in creating functional products and processes.The principle objective of
this project is to analyze and design a multistoried building by using
respective software and Indian standard specifications
In the present study, RCC Residential Structure of G+2 floors will be
analyzed and designed for different load combinations as specified in the
Indian standard codes using E- Tabs software.
E-Tabs software features a state-of-art user interface visualization tools,
powerful analysis and design engines with advanced finite element and
dynamic analysis capabilities.
7. ETABS
ETABS is Acronym of EXTENDED 3 DIMENSIONL ANALYSIS OF
BUILDING SYSTEMS. It is developed by CSI in the year of 1984. ETABS
is a sophisticated easy to use, special purpose analysis and design program
developed specifically for building systems.
8. The advantages of ETABS are following:
•Simple gird system defined by horizontal floors and vertical
column lines can establish building geometry with minimal effort
•The floors levels in buildings are similar. This commonality can be
used numerically to reduce computational effort.
•Auto calculation of reinforcements for beams and columns based
moments.
•Buildings subjected to any number of vertical and lateral load cases
and combinations, including automated seismic loads can
be analysed and designed easily.
•Automated transfer of vertical loads on floors to beams and walls.
•Automated vertical live load reductions.
9. OBJECTIVES
The following objectives are framed for this study:
To analyse the design of G+2 residential building using ETABS software.
To analyse the behaviour of building when it is subjected to seismic load.
To design the structural components like beam, slab, column and footing manually.
To plan the building, which meets the basic requirements such as safety, durability,
Economy, Aesthetic appearance, Feasibility, Practicability and Acceptability.
To compare the results obtained from software method and manual method.
12. ANALYSIS USING ETABS
Modelling of building
1. New file – building setting used
2. Units used –metric SI
3. Steel section data base –INDIAN
4. Steel design code IS800-2007
5. Concrete design code IS456-2000
Storey data No. of storey-4
Typical storey height 3m
bottom storey height 3m
13. • Assigning Material
Adding new material according to Indian Standard
1. Concrete grade used M20 for beams and slab
M25 for columns
2. Rebar IS standard i.e, HYSD 500 for longitudinal
reinf.
HYSD 415 for shear reinf.
Defining section properties
1. Define column – 12”x12” Material used M25 concrete
2. Define beam – 14”x 9” Material used M20 concrete
Slab section
Thickness 5”
Defining diaphragm
Lateral load resisting system
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 13
14. • Defining load pattern
Dead load
live load
Wall load(wl)
Partition wall load (pwl)
Earthquake load (Eqx and Eqy) as per
IS 1893-2002
Floor finish
In assigning of seismic load As per IS 1893-2002
1.Sesmic zone factor =0.36
2. Response reduction factor R=5
3.Importance factor I=1
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 14
19. Defining Mass source
Load pattern and mass multiplier
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 19
20. ASSINGNING Beams and Columns
BEAMS select 14”x9” as property
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 20
21. COLUMN select column 12”x12” as property
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 21
SLABS thickness 5”
22. DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 22
Assigning loads
Wall load
• For external wall
9” wall after deducting opening(20 to
30%)=9kN/m
• For interior wall =4.5kN/m
•For parapet wall =3kN/m
Assigning uniform load
Live load =2kN/m2
Live load for roof floor =1.5kN/m2
For floor finish =1kN/m2
For partition wall load =2kN/m2
For staircase load =10kN/m2
Assigning Diaphragms
select D1 D2 D3 D4 for
corresponding storey
23. Defining load combinations for
concrete frame design
Assigning floor automesh options
Meshing is done for proper transfer of
loads from slabs to frames
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 23
25. Analysis Part
Lock and Run Model Analysis
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 25
26. DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 26
Forces Stress Diagram Spring or Support Reaction Select
Combo Load (1.5DL+LL+WL+PWL+FF+Staircase)
Here We get the reactions that will used for Designing of footing
27. BMD
Forces Stress Diagram Frame / Pier / Link Forces Use Combo
(1.5DL+LL+WL+PWL+FF+Staircase) Select Max B.M (Moment 3-3)
Include Frames
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 27
28. SFD
Forces Stress Diagram Frame / Pier / Link Forces Use Combo
(1.5DL+LL+WL+PWL+FF+Staircase) Select Shear 2-2 (Max SF)
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 28
29. AXIAL FORCE
Forces Stress Diagram Frame / Pier / Link Forces Use
Combo (1.5DL+LL+WL+PWL+FF+Staircase) Axial Forces
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 29
30. Analysis of BM in Slab
Forces Stress Diagram Shell Stress Force Select
Combo(1.5DL+LL+WL+PWL+FF+Staircase) Select Mmax
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 30
31. SF in Slab
Forces Stress Diagram Shell Stress Force Select
Combo(1.5DL+LL+WL+PWL+FF+Staircase) SF in Slab
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 31
32. Analysis Building in Response Spectrum Plot
Select Story response plot Select Eqx, Max Storey Displacment & Storey
Displacement is the total Displacement of the storey with respect to ground
Max Storey Displcement = 0.004*Height of building(9m excluding base)
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 32
33. Maximum storey displacement =0.004*9
=0.036m=36mm
But here maximum displacement is 15.6mm(Eqx)
therefore lies in the permissable value hence structure is safe.
For earthquake in y direction( Eqy)
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 33
34. But here maximum displacement along Y direction is 14.66 <36mm
hence safe
Storey drift
It is the ratio of difference
between 2 consecutive storey
displacement to height of the
storey
According to IS 1893-2002 max
permissible storey drift is 0.004
Along Eqx but here max storey
drift is 0.0017<0.004 hence safe
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 34
35. Along Eqy
Here along Eqy direction max storey drift 0.001623<0.004 hence safe
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 35
36. Model participating mass ratio ; Here time period lies between 0.1 to
1.1sec hence safe
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 36
37. Torsional irregularity
Check diaphragm drift
It is the ratio of max diaphragm drift to the avg diaphragm drift
it should not be greater than 1.4
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 37
Here ratio is less than 1.4 therefore there is no extreme
torisional irregularity along Eqx hence safe
38. Along Eqy
Here ratio <1.4 no extreme torsional irregularity building is safe
DEPARTMENT OF CIVIL ENGINEERING , MCE, HASSAN 38
39. CONCLUSIONS
There are three methods to design RCC structure, (working stress method, ultimate method, and limit state
method) out of which the limit state method gave an adequate section to satisfy strength and serviceability criteria.
For all the combinations of loads the classical method such as Kani’s method, moment distribution method etc are
not suitable hence the E-TABS program was used for the analysis of the structure for all the loading combinations.
The detailing of reinforcement is carried as per IS code provision which provides ductility to the structure and
hence better performance.
Initially the dimensions of structural members are assumed; the maximum percentage of reinforcement in all
structural members is less than IS specifications.
All the structural components are checked to satisfy the serviceability criteria and hence provided dimensions of
all structural components are adequate.
Department of Civil Engineering , MCE, Hassan
40. REFERENCE
•Pardeshi Sameer (2016). “study of seismic analysis and design of multi storey
symmetrical and asymmetrical building”, International research journal of
engineering and technology (IRJET). E-ISSSN:2395-0072.
• Mahesh N Patil (2015). “seismic analysis of multi storey building”, International
journal of engineering and innovative technology (IJEIT). ISSN:2277-3754
• T Prashanthi (2017). “ To study of seismic analysis and design for different plan
configuration in structural behaviour of multi storey RC frame building”,
International journal of engineering and innovative technology(IJEIT).
ISSN:2349:6002.
• IS 4928-1993:Indian standard code of practice for earthquake resistant design and
construction of buildings.
• IS 1893-2002:Indian standard code of practice criteria for earthquake resistance
design of structures
Department of Civil Engineering , MCE, Hassan
