International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
Soil structure interaction of RC building with different foundations and soil types Suman1 , Dr.Sunil Kumar Tengali2 M.Tech Computer Aided Structural Engineering REVA University Bengaluru-560064, India P.G.Co-ordinator, Computer Aided Structural Engineering REVA University Bengaluru-560066, India ------------------------------------------------------------------------***----------------------------------------------------------------------1
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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.
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.
Key Words: Soil structure interaction, pile foundation, raft foundation, time period, Maximum displacement.
Objectives:
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.
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.
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 ,
Š 2017, IRJET
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Impact Factor value: 5.181
[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.
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