Objectives: To study the multilayered soil. Methods/Analysis:the pile foundation is analyzed in ANSYS. The effect about soilstructure interface on thedisplacement of columns in theconnected by means of thoseobtained on or after thesoilstructural analysis and theconservative method of analysis. Soil non-linearity inside the horizontaldirection is performed by means of Pcurves. Findings: These curves are developed using Matlock and API(American PetroleumInstitute) equations. And the results shows that the values obtained from SSI for bending moment, shear force and deflection are more than that of without SSI. interaction on a building frame embedded in multilayered soil types of piles and number of bays andout for the differenttypes of soils using ANSYS

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International Journal of Civil Engineering and Technology (IJCIET)
Volume 8, Issue 1, January 2017, pp.
Available online at http://www.iaeme.com/IJCIET
ISSN Print: 0976-6308 and ISSN Online: 0976
© IAEME Publication Scopus
EFFECT OF SOIL INTER
FRAME EMBEDDED IN MU
PG Student, Civil Enginee
K L University, Vaddeswaram
Asst.Professor, Civil Enginee
K L University,
ABSTRACT
Objectives: To study the
multilayered soil. Methods/Analysis:
the pile foundation is analyzed in ANSYS. The effect about soil structure interface on the
displacement of columns in the
connected by means of those obtained on or after the soil structural analysis and the conservative
method of analysis. Soil non-linearity inside the horizontal direction is performed by means of P
curves. Findings: These curves are developed using Matlock and API(American Petroleum
Institute) equations. And the results shows that the values obtained from SSI for bending moment,
shear force and deflection are more than that of without SSI.
interaction on a building frame embedded in multilayered soil
types of piles and number of bays and
out for the different types of soils using ANSYS.
Key words: Soil structure interaction, Building frame, Multilayer soil, Experimental results,
Nonlinearity.
Cite this Article: G. Anugna Sai and N. Jitendra Babu
Frame Embedded in Multilayered Soil
8(1), 2017, pp. 670–675.
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=1
1. INTRODUCTION
Soil-structure interface (SSI) analysis is a
of the buildings involve some types of structural elements with direct
forces like earthquakes result in these systems
not dependent on each other. The
interaction between the foundations, structure, underneath
past investigation reveals that the effect of soil with
interface studies which were earlier discussed
supported on a plane frame with different rigidity
IJCIET/index.asp 670
International Journal of Civil Engineering and Technology (IJCIET)
, pp. 670–675, Article ID: IJCIET_08_01_078
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=
6308 and ISSN Online: 0976-6316
Scopus Indexed
EFFECT OF SOIL INTERACTION ON 3×3
FRAME EMBEDDED IN MULTILAYERED SOIL
G. Anugna Sai
PG Student, Civil Engineering Department,
L University, Vaddeswaram, Andhra Pradesh, India
N. Jitendra Babu
Asst.Professor, Civil Engineering Department,
L University, Vaddeswaram, Andhra Pradesh, India
study the effect of soil interaction on 3×3 building frame embedded in
Methods/Analysis: A simple three storey three bay framed structure laying on
the pile foundation is analyzed in ANSYS. The effect about soil structure interface on the
the structural frame is investigated. The investigational results are
connected by means of those obtained on or after the soil structural analysis and the conservative
linearity inside the horizontal direction is performed by means of P
These curves are developed using Matlock and API(American Petroleum
Institute) equations. And the results shows that the values obtained from SSI for bending moment,
shear force and deflection are more than that of without SSI. Applications:
interaction on a building frame embedded in multilayered soil concept can be extended to different
types of piles and number of bays and storeyes can be increased further the analysis can be carried
s of soils using ANSYS.
Soil structure interaction, Building frame, Multilayer soil, Experimental results,
G. Anugna Sai and N. Jitendra Babu, Effect of Soil Interaction on 3×3 Building
Multilayered Soil. International Journal of Civil Engineering and Technology
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=1
(SSI) analysis is a very particular field of earthquake engineering
some types of structural elements with direct influence on earth
these systems like structural displacements or ground displacements
The structural response to the earthquake vibrations influenced
the foundations, structure, underneath and surrounding soils of the
past investigation reveals that the effect of soil with the structure can be considered relatively. The
interface studies which were earlier discussed, accepted that resting on replica (model) pile foundation
frame with different rigidity1-2
. The building frame is subjected to CCL, UDL, EC
editor@iaeme.com
&IType=1
3×3 BUILDING
LTILAYERED SOIL
, Andhra Pradesh, India
, Andhra Pradesh, India
building frame embedded in the
three bay framed structure laying on
the pile foundation is analyzed in ANSYS. The effect about soil structure interface on the
frame is investigated. The investigational results are
connected by means of those obtained on or after the soil structural analysis and the conservative
linearity inside the horizontal direction is performed by means of P-Y
These curves are developed using Matlock and API(American Petroleum
Institute) equations. And the results shows that the values obtained from SSI for bending moment,
ions: Effect of soil structure
concept can be extended to different
further the analysis can be carried
Soil structure interaction, Building frame, Multilayer soil, Experimental results,
Effect of Soil Interaction on 3×3 Building
International Journal of Civil Engineering and Technology,
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=1
earthquake engineering. Generally, most
influence on earth. The peripheral
or ground displacements are
the earthquake vibrations influenced by the
soils of the foundation. The
the structure can be considered relatively. The
accepted that resting on replica (model) pile foundation
. The building frame is subjected to CCL, UDL, ECL.

2. Effect of Soil Interaction on 3×3 Building Frame Embedded in Multilayered Soil
http://www.iaeme.com/IJCIET/index.asp 671 editor@iaeme.com
The end fallouts show that the BM & SF, which were drawn from the experimental examination, showed
large drop with the reduction of rigidity of plinth beam. The explanation for the effect of the rigidity of the
plinth beam on a building frame supported on a group of piles embedded in sandy soils by the result of
static vertical load tests3
. The effect of the rigidity of plinth beam on displacements and rotation at the
column base and also shears and bending moments in the building frame were investigated. In the
analytical model, soil nonlinearity in the axial stated that stretchy pile caps laterally with rigidity must be
measured and stiffness matrix of substructure needs to be drawn out by consideration of all the piles in a
single group and also gave the explanation for a single-storeyed and two bayed space frame resting on
group of piles with flexible cap by resorting to more rational approach and realistic assumptions4-6
. The
effect of a single pile when it is fixed its reaction over the SSI on the response of super-structure7
. Analysis
has been presented on pile foundation (single pile or pile group) and most of the work dealt with the
analysis of a framed construction, which rests on the pile groups, and the explanation intended for SSI and
group piles are exposed to lateral loads by using the ‘P-Y’ Curve8-11
.
2. OBJECTIVES
The main objective of the work is to analyze a framed structure supported on pile group embedded in
multilayered soil considering Soil Structure Interaction (SSI) and compare the same with a structure
analyzed without considering SSI.
1. Deriving the p-y curves as per the soil considered and by using the obtained values analyzing the
structure in ANSYS.
2. Obtain BM, Deflection and SFD for the structure considered and comparing the obtained results with a
structure analyzed with and without considering SSI.
3. METHODOLOGY
Bearing capacity is a major factor to be considered for a structure to withstand on a particular soil. So, my
experimental investigation takes me to identify Structural behavior (Shear force, Bending Moment and
Deflection) on different types of multilayered soils like Clayey soil and Sandy Soil to interact and compare
with non-interaction of soil.
3.1. Derivation of P-Y Curve
P-Y curves for sandy soil and clayey soil are derived using Matlock equations and API equations.
Matlock equations method for soft clay
Pu= [3+( γ̍/Cu)×Z+(J/D)×Z]×Cu×D (1)
Y50 = 2.5×Ɛ50×D (2)
P/Pu = 0.5[y/y50]0.15
(3)
Where,
Pu = ultimate soil resistance related to undrained shear strength of soil
P = Horizontal soil resistance
y = Horizontal pile deflection
y50 =soil displacement at 11/2
of maximum soil resistance
(Ultimate lateral pile deflection)
D =Pile diameter
Ɛ50=Strain at fifty percent about maximum shear stresses inside unconfined undrained triaxial test
J= 0.5 for soft clay
Z= Depth of soil & γ' = effective unit weight of the soil

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The curve was shown in Figure 1.
API equation method for sandy soils
Pst= (C1Z + C2
Psd= C3Dγ'Z
Ās= [3-0.8(Z/D)]
P = ĀPs tank [(KZ/
Where,
P = soil resistance
Y = pile displacement
K = subgrade modulus
Pu = ultimate bearing capacity of the soil
γ'= unit weight of soil & C
The curve was shown in Figure 2.
G. Anugna Sai and N. Jitendra Babu
IJCIET/index.asp 672
The curve was shown in Figure 1.
Figure 1 Matlock curve for soft clay
API equation method for sandy soils
2D) ×γ' Z (1)
(2)
0.8(Z/D)] ≥ 0.9 (3)
[(KZ/ĀPu) ×y] (4)
imate bearing capacity of the soil
= unit weight of soil & C1, C2, C3 = correction factor
The curve was shown in Figure 2.
Figure 2 API curve for sandy soils
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4. Effect of Soil Interaction on 3×3 Building Frame Embedded in Multilayered Soil
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3.2. Modeling and Analysis
Analysis of a 3×3 building frame is analyze
foundation interacted in cohesive soil
Figure 3 Analysis of a building frame with considering Soil Structure Interaction
4. RESULTS AND COMPARISON
A graph is plotted between BM, Deflection
pile foundation analyzed in ANSYS.
behavior, therefore, the deflection, bending moment and shear force are evaluated by considering soil and
without soil interaction. From the Figure 4.
deflection in interaction and without interaction of soil compared to column one and column three. Column
four has maximum deflection with soil intera
interaction. Hence, the considered frame is more e
observed that shear force is more effective in all column when interacted with soil compared
interaction. Column four has the maximum
shear force without soil interaction. Hence, the considered frame is more effective in multilayered soils.
From the Figure 6. it is observed that
fourth column and has more bending moment in columns with soil interaction. Therefore, the
column has more shear force and less bending moment. Column two has a
with soil interaction and column four has minimum bending moment without soil interaction, hence, the
considered frame is more effective in multi
Effect of Soil Interaction on 3×3 Building Frame Embedded in Multilayered Soil
IJCIET/index.asp 673
building frame is analyzed. Figure 3. Shows the view of frame model with pile
foundation interacted in cohesive soil
Analysis of a building frame with considering Soil Structure Interaction
AND COMPARISON
Deflection, and SFD of the column for a framed structure embedded
foundation analyzed in ANSYS. An experimental investigation is majorly focused on structural
the deflection, bending moment and shear force are evaluated by considering soil and
From the Figure 4. It is observed that column two and column four obtained more
deflection in interaction and without interaction of soil compared to column one and column three. Column
four has maximum deflection with soil interaction and column one has minimum deflection without soil
interaction. Hence, the considered frame is more effective in multilayered soils.
observed that shear force is more effective in all column when interacted with soil compared
maximum shear force with soil interaction and column two has minimum
shear force without soil interaction. Hence, the considered frame is more effective in multilayered soils.
From the Figure 6. it is observed that bending moment has slight decrement from second column and
fourth column and has more bending moment in columns with soil interaction. Therefore, the
column has more shear force and less bending moment. Column two has a
oil interaction and column four has minimum bending moment without soil interaction, hence, the
considered frame is more effective in multi-layered soils.
Effect of Soil Interaction on 3×3 Building Frame Embedded in Multilayered Soil
editor@iaeme.com
the view of frame model with pile
Analysis of a building frame with considering Soil Structure Interaction
for a framed structure embedded with
investigation is majorly focused on structural
the deflection, bending moment and shear force are evaluated by considering soil and
is observed that column two and column four obtained more
deflection in interaction and without interaction of soil compared to column one and column three. Column
ction and column one has minimum deflection without soil
ffective in multilayered soils. From the Figure 5. it is
observed that shear force is more effective in all column when interacted with soil compared to non-
shear force with soil interaction and column two has minimum
shear force without soil interaction. Hence, the considered frame is more effective in multilayered soils.
bending moment has slight decrement from second column and
fourth column and has more bending moment in columns with soil interaction. Therefore, the fourth
column has more shear force and less bending moment. Column two has a maximum bending moment
oil interaction and column four has minimum bending moment without soil interaction, hence, the

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Figure 4
Figure 5 Shear force in
Figure 6 Bending moment in
G. Anugna Sai and N. Jitendra Babu
IJCIET/index.asp 674
Deflection in UY-direction for with and without SSI
Shear force in FY-direction for with and without SSI
Bending moment in MZ-direction for with and without SSI
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direction for with and without SSI
direction for with and without SSI
direction for with and without SSI

6. Effect of Soil Interaction on 3×3 Building Frame Embedded in Multilayered Soil
http://www.iaeme.com/IJCIET/index.asp 675 editor@iaeme.com
5. CONCLUSIONS
The deflection without considering SSI is 38% more than with considering SSI at column two. The shear
force without considering SSI is 50% more than with considering SSI at column one. The bending moment
without considering SSI is 13.9% more than with considering SSI at column two.
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