Soil structure interaction of RC building with different foundations and soil types
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This document discusses analyzing the effects of soil-structure interaction on reinforced concrete buildings with different foundation types and soil properties. It aims to study how considering soil-structure interaction impacts the structural behavior of a G+7 building supported by pile and raft foundations when subjected to seismic loads. The study uses SAP2000 software to model a building with and without considering layered soil properties in the pile and raft foundation models. Key results compared include natural period, displacement, storey shear, and drift, finding that considering soil-structure interaction generally increases period and displacement while decreasing stiffness. The objective is to determine the most suitable foundation to avoid structural failure considering this interaction.
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 732
Soil structure interaction of RC building with different foundations and
soil types
Suman1 , Dr.Sunil Kumar Tengali2
1 M.Tech Computer Aided Structural Engineering REVA University Bengaluru-560064, India
2 P.G.Co-ordinator, Computer Aided Structural Engineering REVA University Bengaluru-560066, India
------------------------------------------------------------------------***-----------------------------------------------------------------------
Abstract: Conventional structural design methods neglect
the Soil Structure Interaction (henceforth SSI) effects.
Ignoring of SSI is reasonable for light structures in relatively
hard soil such as low rise buildings and simple rigid
retaining walls. The effect of SSI, however, becomes very
dangerous for heavy structures resting on relatively soft
soils such as clay silt. Most of the designers do not consider
the soil structure interaction i.e. Soil layers and its
subsequent effect on structure during earthquakes. When a
structure is subjected to ground motion, coupling action
takes place at the foundation and overturning of structure
occurs, and thus changes the motion of the ground. By
considering soil-structure interaction, makes a structure
more strengthening and thus, increasing the natural period
of the structure compared to the corresponding rigidly
supported structure. The present work emphasizes the
importance of soil structure interaction in the analysis. To
study this effect, a G+7 storeyed building with vertical
irregularities located in zone IV is analyzed using SAP2000
by considering different soil properties and different types of
foundations. Conclusions will be drawn for the selection of
suitable foundation to avoid failure of the structure.
Key Words: Soil structure interaction, pile foundation, raft
foundation, time period, Maximum displacement.
Introduction:
The construction of high-rise building, medium height
buildings and small areas for usually used the pile and raft
Foundations to support the structure under the soft
grounds and reclaimed land. The normal conditions of soil
the building is subjected to lateral loads and moments due
to structural eccentricity of the footing. During an
earthquake, the Seismic waves circularize or pass through
soil layers then the additional bending moments are
developed in the pile and Raft due to kinematic loads
applied by the superstructure to substructures, as well as
deformation of the Surrounding soil. Both inertial loads
and soil deformation effects the ground acceleration
during an earthquake event. During strong earthquake two
effects on the pile and raft foundation, firstly pile behave
nonlinear as well as raft while surrounding soil is soft ,
secondly, large amount of inertia forces are generated in
the soil it cause the separation of sub-soil and footing so it
may causes the failure of the structure, so the study of soil
structure Interaction is one of the beneficial effects on the
seismic response of the building, it decreases the
frequency of the building , and also it increases the
flexibility of the building and story drift, lateral deflection
compared to the corresponding rigidly supported
structure.
Problem statement:
This paper analysis of vertical irregularity of building and
consideration of soil structure interaction under seismic
loading. Aimed with purpose, the vertical irregular
building (G+7) with pile foundation is analyzed by using
SAP 2000 subjected to the combination of gravity load and
seismic load under specific zone. Compare the same
building with raft foundation and consideration of soil
structure interaction; it is analyzed by using the SAP2000
software. Results are compared structural building with
and without soil structure interaction.
Objectives:
The based on previous case study deals with the effect of
soil structure interaction on RC building. The objective of
this present work is to study with and without soil
structure interaction effect of layered soil on structural
behavior of building supported on pile and raft foundation
when subjected to seismic load. During dynamic loading
the consideration of fixed support reduces the overall
strength of the structure and brings out changes in
frequency as well as natural time period of the structure.
So following objectives are determine to increasing the
time period of the building.
[1]The comparison between vertical irregular of building
supported by pile foundation with and without soil
structure interaction.
[2] The comparison between vertical irregular of building
supported by raft foundation with and without soil
structure interaction.](https://image.slidesharecdn.com/irjet-v4i7129-170828073025/85/Soil-structure-interaction-of-RC-building-with-different-foundations-and-soil-types-1-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 733
Methodology:
RC frame structure supported by a pile and raft
foundations of two high rise buildings (G+7) this both the
buildings are designed by considering the with and
without soil structure interaction subjected to a seismic
forces. These buildings are analyzed by using the Response
spectrum method using SAP2000. Seismic analysis was
carried out by using the IS1893-2002 part 1.
[a]Input data for building: bay of 2*1 and its width is 4m
and length is 8m and height of the building is 24m, Size of
column is 400mm*1400mm and size of beam
400mm*800mm and slab thickness is 175mm,imposed
load 2KN/m2 floor, finish 1.5KN/m2, wall load
9.68KN/m2,wall thickness 200mm.[b]Input data for pile:
length of pile 8.2m,size concrete pile cap
size800mm*1400mm, pile groups1x1 for c-1,c-3,c-4,c-6
and 2x1 for c-2,c-5.
[c]Input data for raft: cross section 520mm*520mm, depth
of raft 800mm.
[d]Response spectrum data: Seismic zone factor 0.24,
damping ratio 0.05, soil type (2) medium,
In all models considered in plan of structural RC building,
same number of storeys for all the soil condition models
and using materials are also same for all models.
Soil layer properties for pile foundation.
The Pile foundation should be located at the down to the
refusal strata, in this paper depth of pile foundation is
considered as 8.2m.
Soil layer properties for pile foundation.
Depth Soil layer Young’s
modulus(K
N/m3)
Unit
weight
(KN/m
2)
Poisso
n’s
ratio
From
GL-2.8
clay silt 17.75 22*103 0.3
2.8-
3.8
Sandy
clay with
silt
17.75 22*103 0.3
3.8-5 Fine sand 18.5 24*103 0.3
5-7 Sandy
clay with
silt
17.75 22*103 0.3
7-6.8 Clay silt 17.75 17.75 22*103 0.3
6.8-
13.6
Clay silt
and hard
strata
17.75 17.75 22*103 0.3
Fig.1.Models of Pile foundation of RC building with and
without consideration of soil layer
Soil layer properties for raft foundation.
In this model depth of the raft foundation is 4.2m
Table 2: soil layer properties for raft foundation
Depth(
m)
Soil
layer
Young’s
modulus(KN
/m3)
Unit
weight(KN
/m2)
Poisso
n’s
ratio
0-2.8 Clay
silt
17.75 22*103 0.3
2.8-4.2 Sandyc
lay
with
silt
17.75 22*103 0.3
4.2 Fine
sand
18.5 24*103 0.3](https://image.slidesharecdn.com/irjet-v4i7129-170828073025/85/Soil-structure-interaction-of-RC-building-with-different-foundations-and-soil-types-2-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 734
Fig.2.Models of raft foundation of RC building with and
without consideration of soil layer
Result and discussions:
The analysis of RC framed structure using SAP2000 has
been performed for different combinations of soil layer for
Pile and Raft foundations. To determining the time period,
Horizontal displacement, maximum displacement, storey
shear, and story drift at different storey level, by using the
Response spectrum analysis.
Type1 and Type 1.1 RC framed structure of pile foundation
with and without consideration of soil layer models
Type2- and Typ2.1- RC framed structure of raft foundation
with and without consideration of soil layer models.
[1] The comparison between vertical irregular of
building supported by pile foundation with and
without soil structure interaction.
1)Time period:
For the Strcture of Pile foundation model with and without
soil structure interaction models time period in sec
Table 3:No of mode v/s time period
Fig 3: No of mode v/s time period
Overall observing the time period for the pile foundation of
RC frame building with and without consideration of soil
layer, in that increasing the time period of the structure is
type 1 i.e. RC framed structure of pile foundation with soil
layer.
2) Maximum displacement:
The raft foundation of RC frame structure with and
without consideration of soil structure interaction model
displacement in y direction displacement (mm) is
tabulated
0
0.2
0.4
0.6
0.8
1 3 5 7 9 11
Timeperiod
No of mode
TIME PERIOD
type1 Sec
type1.1 Sec
Mode No’s Type1 Type1.1
1 0.71254 0.697265
2 0.4042 0.403997
3 0.39979 0.389005
4 0.20046 0.201187
5 0.13875 0.136412
6 0.12865 0.129284
7 0.127131 0.127972
8 0.085936 0.080506
9 0.082447 0.078662
10 0.07914 0.067227
11 0.078903 0.066392
12 0.067097 0.052915](https://image.slidesharecdn.com/irjet-v4i7129-170828073025/85/Soil-structure-interaction-of-RC-building-with-different-foundations-and-soil-types-3-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 735
Table4:Number of storey V/maximum displacement
Fig 4: No of storey v/s Displacement
From above graph shows the considering of soil structure
interaction displacement is7.39% times higher than the
without considering soil structure interaction of the model
i.e. type 1
[2]The comparison between vertical irregular of
building supported by raft foundation with and
without soil structure interaction
1) Time period:
The time period for the mat foundation of RC frame
structure with and without soil structure interaction in sec
Table 5: No of mode V/s Time period
Fig 5: No of mode v/s Time period
With consideration of soil layer model time period is
maximum i.e.9.5%than the type 2.1.
2)Maximum displacement:
The raft foundation of RC frame structure with and
without consideration of soil structure interaction model
displacement in y direction displacement (mm) is
tabulated
Table 6: Number of storey v/s displacement
No of storeys Type2 Type2.1
1
0.02038 0.51747
2
0.91485 1.65899
3
1.94455 2.67829
4
2.88252 3.60549
5
3.80138 4.53749
0
2
4
6
8
10
12
14
16
1 2 3 4 5 6 7 8
Displacement
No of stories
Displacement for Y direction
type 1
type1.1
0
0.5
1
1.5
1 3 5 7 9 11
Timeperiod
No of modes
Time period
type2 Sec
type 2.1 Sec
No of
Storey’s
Type1 Type1.1
1 0.8293 0.7498
2 2.9595 2.8236
3 5.0911 4.8847
4 7.1115 6.8551
5 8.879 8.593
6 10.0685 9.7002
7 12.8979 12.0127
8 13.7978 12.8484
Mode
No’s
Type2 Type2.1
1 1.154432 1.258663
2 0.356193 0.416646
3 0.343799 0.39509
4 0.189451 0.211855
5 0.157322 0.163065
6 0.129431 0.140021
7 0.12337 0.139844
8 0.089241 0.099421
9 0.078835 0.08855
10 0.068761 0.078139
11 0.0598 0.064695
12 0.055515 0.057464](https://image.slidesharecdn.com/irjet-v4i7129-170828073025/85/Soil-structure-interaction-of-RC-building-with-different-foundations-and-soil-types-4-320.jpg)
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 736
6
4.68943 5.44962
7
5.89052 6.7461
8 6.3187 7.20957
Fig.6. No of mode V/s Time period
The raft foundation without consideration of soil structure
interaction shows the maximum displacement is 14.10%
of more than the with consideration of soil structure
interaction model.
The raft foundation of RC frame structure with
consideration soil structure interaction model is within the
permissible limit as per the IS 1893 part (1) 2002 clause
7.11.1.
0
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7 8
Displacement
No of stories
Displacement for y direction
Type 2
Type 2.1
Conclusion:
The pile foundation of RC frame structure with
consideration of SSI as per above discussion we observed
that the time period is increases and also it gives the more
flexibility for the building and frequency is decreases. In
case of raft foundation time period is decreases with
consideration of SSI due to presence of medium soil to soft
soil. And In case of pile foundation of RC frame structure
with consideration of SSI,displacement is more in above
the ground storey level .Very negligible displacement
below ground storey due to presence of consideration of
SSI in case of raft foundation RC frame structure with
consideration of SSI, displacement is minimum and
without consideration of soil layer model shows the
maximum displacement at above the ground storey but it
doesn’t exceeded the as per IS 1893-2002 part I so it is
feasible to improve the stiffness in elements by providing
infill or bracings.
References
[1]. S.Thusoo, K.Modi, R.Kumar, H.Madahar (2015) the
“Response of building with soil structure interaction with
varying soil types”.
[2]. P. Sharma, I. Pal Singh, Ankit (2014) “soil Structure
Interaction Effect on Asymmetrical building with shear
soil”.
[3].Er.Puneet Sharma et.al (2014) “The analysis of soil
structure interaction effects on asymmetrical RC Building
with shear wall by using STADD pro”
[4]. Sushma Pulikanti and Pradeep Kumar Ramancharla
(2014) “The effect of SSI Analysis of Framed structures
supported on pile foundation with and without interface
element”.](https://image.slidesharecdn.com/irjet-v4i7129-170828073025/85/Soil-structure-interaction-of-RC-building-with-different-foundations-and-soil-types-5-320.jpg)
Soil structure interaction of RC building with different foundations and soil types
- 1. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 732 Soil structure interaction of RC building with different foundations and soil types Suman1 , Dr.Sunil Kumar Tengali2 1 M.Tech Computer Aided Structural Engineering REVA University Bengaluru-560064, India 2 P.G.Co-ordinator, Computer Aided Structural Engineering REVA University Bengaluru-560066, India ------------------------------------------------------------------------***----------------------------------------------------------------------- Abstract: Conventional structural design methods neglect the Soil Structure Interaction (henceforth SSI) effects. Ignoring of SSI is reasonable for light structures in relatively hard soil such as low rise buildings and simple rigid retaining walls. The effect of SSI, however, becomes very dangerous for heavy structures resting on relatively soft soils such as clay silt. Most of the designers do not consider the soil structure interaction i.e. Soil layers and its subsequent effect on structure during earthquakes. When a structure is subjected to ground motion, coupling action takes place at the foundation and overturning of structure occurs, and thus changes the motion of the ground. By considering soil-structure interaction, makes a structure more strengthening and thus, increasing the natural period of the structure compared to the corresponding rigidly supported structure. The present work emphasizes the importance of soil structure interaction in the analysis. To study this effect, a G+7 storeyed building with vertical irregularities located in zone IV is analyzed using SAP2000 by considering different soil properties and different types of foundations. Conclusions will be drawn for the selection of suitable foundation to avoid failure of the structure. Key Words: Soil structure interaction, pile foundation, raft foundation, time period, Maximum displacement. Introduction: The construction of high-rise building, medium height buildings and small areas for usually used the pile and raft Foundations to support the structure under the soft grounds and reclaimed land. The normal conditions of soil the building is subjected to lateral loads and moments due to structural eccentricity of the footing. During an earthquake, the Seismic waves circularize or pass through soil layers then the additional bending moments are developed in the pile and Raft due to kinematic loads applied by the superstructure to substructures, as well as deformation of the Surrounding soil. Both inertial loads and soil deformation effects the ground acceleration during an earthquake event. During strong earthquake two effects on the pile and raft foundation, firstly pile behave nonlinear as well as raft while surrounding soil is soft , secondly, large amount of inertia forces are generated in the soil it cause the separation of sub-soil and footing so it may causes the failure of the structure, so the study of soil structure Interaction is one of the beneficial effects on the seismic response of the building, it decreases the frequency of the building , and also it increases the flexibility of the building and story drift, lateral deflection compared to the corresponding rigidly supported structure. Problem statement: This paper analysis of vertical irregularity of building and consideration of soil structure interaction under seismic loading. Aimed with purpose, the vertical irregular building (G+7) with pile foundation is analyzed by using SAP 2000 subjected to the combination of gravity load and seismic load under specific zone. Compare the same building with raft foundation and consideration of soil structure interaction; it is analyzed by using the SAP2000 software. Results are compared structural building with and without soil structure interaction. Objectives: The based on previous case study deals with the effect of soil structure interaction on RC building. The objective of this present work is to study with and without soil structure interaction effect of layered soil on structural behavior of building supported on pile and raft foundation when subjected to seismic load. During dynamic loading the consideration of fixed support reduces the overall strength of the structure and brings out changes in frequency as well as natural time period of the structure. So following objectives are determine to increasing the time period of the building. [1]The comparison between vertical irregular of building supported by pile foundation with and without soil structure interaction. [2] The comparison between vertical irregular of building supported by raft foundation with and without soil structure interaction.
- 2. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 733 Methodology: RC frame structure supported by a pile and raft foundations of two high rise buildings (G+7) this both the buildings are designed by considering the with and without soil structure interaction subjected to a seismic forces. These buildings are analyzed by using the Response spectrum method using SAP2000. Seismic analysis was carried out by using the IS1893-2002 part 1. [a]Input data for building: bay of 2*1 and its width is 4m and length is 8m and height of the building is 24m, Size of column is 400mm*1400mm and size of beam 400mm*800mm and slab thickness is 175mm,imposed load 2KN/m2 floor, finish 1.5KN/m2, wall load 9.68KN/m2,wall thickness 200mm.[b]Input data for pile: length of pile 8.2m,size concrete pile cap size800mm*1400mm, pile groups1x1 for c-1,c-3,c-4,c-6 and 2x1 for c-2,c-5. [c]Input data for raft: cross section 520mm*520mm, depth of raft 800mm. [d]Response spectrum data: Seismic zone factor 0.24, damping ratio 0.05, soil type (2) medium, In all models considered in plan of structural RC building, same number of storeys for all the soil condition models and using materials are also same for all models. Soil layer properties for pile foundation. The Pile foundation should be located at the down to the refusal strata, in this paper depth of pile foundation is considered as 8.2m. Soil layer properties for pile foundation. Depth Soil layer Young’s modulus(K N/m3) Unit weight (KN/m 2) Poisso n’s ratio From GL-2.8 clay silt 17.75 22*103 0.3 2.8- 3.8 Sandy clay with silt 17.75 22*103 0.3 3.8-5 Fine sand 18.5 24*103 0.3 5-7 Sandy clay with silt 17.75 22*103 0.3 7-6.8 Clay silt 17.75 17.75 22*103 0.3 6.8- 13.6 Clay silt and hard strata 17.75 17.75 22*103 0.3 Fig.1.Models of Pile foundation of RC building with and without consideration of soil layer Soil layer properties for raft foundation. In this model depth of the raft foundation is 4.2m Table 2: soil layer properties for raft foundation Depth( m) Soil layer Young’s modulus(KN /m3) Unit weight(KN /m2) Poisso n’s ratio 0-2.8 Clay silt 17.75 22*103 0.3 2.8-4.2 Sandyc lay with silt 17.75 22*103 0.3 4.2 Fine sand 18.5 24*103 0.3
- 3. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 734 Fig.2.Models of raft foundation of RC building with and without consideration of soil layer Result and discussions: The analysis of RC framed structure using SAP2000 has been performed for different combinations of soil layer for Pile and Raft foundations. To determining the time period, Horizontal displacement, maximum displacement, storey shear, and story drift at different storey level, by using the Response spectrum analysis. Type1 and Type 1.1 RC framed structure of pile foundation with and without consideration of soil layer models Type2- and Typ2.1- RC framed structure of raft foundation with and without consideration of soil layer models. [1] The comparison between vertical irregular of building supported by pile foundation with and without soil structure interaction. 1)Time period: For the Strcture of Pile foundation model with and without soil structure interaction models time period in sec Table 3:No of mode v/s time period Fig 3: No of mode v/s time period Overall observing the time period for the pile foundation of RC frame building with and without consideration of soil layer, in that increasing the time period of the structure is type 1 i.e. RC framed structure of pile foundation with soil layer. 2) Maximum displacement: The raft foundation of RC frame structure with and without consideration of soil structure interaction model displacement in y direction displacement (mm) is tabulated 0 0.2 0.4 0.6 0.8 1 3 5 7 9 11 Timeperiod No of mode TIME PERIOD type1 Sec type1.1 Sec Mode No’s Type1 Type1.1 1 0.71254 0.697265 2 0.4042 0.403997 3 0.39979 0.389005 4 0.20046 0.201187 5 0.13875 0.136412 6 0.12865 0.129284 7 0.127131 0.127972 8 0.085936 0.080506 9 0.082447 0.078662 10 0.07914 0.067227 11 0.078903 0.066392 12 0.067097 0.052915
- 4. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 735 Table4:Number of storey V/maximum displacement Fig 4: No of storey v/s Displacement From above graph shows the considering of soil structure interaction displacement is7.39% times higher than the without considering soil structure interaction of the model i.e. type 1 [2]The comparison between vertical irregular of building supported by raft foundation with and without soil structure interaction 1) Time period: The time period for the mat foundation of RC frame structure with and without soil structure interaction in sec Table 5: No of mode V/s Time period Fig 5: No of mode v/s Time period With consideration of soil layer model time period is maximum i.e.9.5%than the type 2.1. 2)Maximum displacement: The raft foundation of RC frame structure with and without consideration of soil structure interaction model displacement in y direction displacement (mm) is tabulated Table 6: Number of storey v/s displacement No of storeys Type2 Type2.1 1 0.02038 0.51747 2 0.91485 1.65899 3 1.94455 2.67829 4 2.88252 3.60549 5 3.80138 4.53749 0 2 4 6 8 10 12 14 16 1 2 3 4 5 6 7 8 Displacement No of stories Displacement for Y direction type 1 type1.1 0 0.5 1 1.5 1 3 5 7 9 11 Timeperiod No of modes Time period type2 Sec type 2.1 Sec No of Storey’s Type1 Type1.1 1 0.8293 0.7498 2 2.9595 2.8236 3 5.0911 4.8847 4 7.1115 6.8551 5 8.879 8.593 6 10.0685 9.7002 7 12.8979 12.0127 8 13.7978 12.8484 Mode No’s Type2 Type2.1 1 1.154432 1.258663 2 0.356193 0.416646 3 0.343799 0.39509 4 0.189451 0.211855 5 0.157322 0.163065 6 0.129431 0.140021 7 0.12337 0.139844 8 0.089241 0.099421 9 0.078835 0.08855 10 0.068761 0.078139 11 0.0598 0.064695 12 0.055515 0.057464
- 5. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 736 6 4.68943 5.44962 7 5.89052 6.7461 8 6.3187 7.20957 Fig.6. No of mode V/s Time period The raft foundation without consideration of soil structure interaction shows the maximum displacement is 14.10% of more than the with consideration of soil structure interaction model. The raft foundation of RC frame structure with consideration soil structure interaction model is within the permissible limit as per the IS 1893 part (1) 2002 clause 7.11.1. 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Displacement No of stories Displacement for y direction Type 2 Type 2.1 Conclusion: The pile foundation of RC frame structure with consideration of SSI as per above discussion we observed that the time period is increases and also it gives the more flexibility for the building and frequency is decreases. In case of raft foundation time period is decreases with consideration of SSI due to presence of medium soil to soft soil. And In case of pile foundation of RC frame structure with consideration of SSI,displacement is more in above the ground storey level .Very negligible displacement below ground storey due to presence of consideration of SSI in case of raft foundation RC frame structure with consideration of SSI, displacement is minimum and without consideration of soil layer model shows the maximum displacement at above the ground storey but it doesn’t exceeded the as per IS 1893-2002 part I so it is feasible to improve the stiffness in elements by providing infill or bracings. References [1]. S.Thusoo, K.Modi, R.Kumar, H.Madahar (2015) the “Response of building with soil structure interaction with varying soil types”. [2]. P. Sharma, I. Pal Singh, Ankit (2014) “soil Structure Interaction Effect on Asymmetrical building with shear soil”. [3].Er.Puneet Sharma et.al (2014) “The analysis of soil structure interaction effects on asymmetrical RC Building with shear wall by using STADD pro” [4]. Sushma Pulikanti and Pradeep Kumar Ramancharla (2014) “The effect of SSI Analysis of Framed structures supported on pile foundation with and without interface element”.