Soil Structure Interaction (Pumphouse) for Bending Moment
Abstract
When structure is built on ground some elements of structure are direct contact with soil. When loads are applied on structure internal forces are developed in both the structure as well as in soil. It results in deformation of both the components which are independent to each other. This are called soil structure interaction. The analysis is done by using (Bentley STAAD.Pro V8i Version 2007) software. The analysis carried out been pump house structure R.C.C. frame structure find out bending moment Z direction fixed support and fixed but support for different soil. It concluded that soil structure interaction more affected on fixed base. So overcome the effects of the soil structure interaction on the soft soil, it is important to design the structure to standard loading condition and interaction forces. Thus this paper concluded that pump house building should be design resist the maximum shear force in fixed base.
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Introduction
Soil structure interaction is a challenging multidisciplinary subject which covers several areas of civil engineering. The soil structure interaction problem has it is important feature of structural engineering on soft soils such as nuclear power plants, concrete and earthen dams. Buildings, bridges, tunnels, pump house, and underground structures may also require particular attention to be given to the problems of soil structure interaction. When structure is built on ground some elements of structure are direct contact with soil. When loads are applied on structure internal forces are developed in both the structure as well as in soil. It results in deformation of both the components which are independent to each other. This mutual dependence in is term as interaction.
Every seismic structural response is caused by soil interaction forces by impacting the structure. These forces occur for every structure but not always. They are able to change the soil motion. Present work of the paper find out the bending moment Z-direction for fixed base and fixed but support for different soil condition like soft, medium and hard soil for seismic load condition.
Conclusion
1) Bending moment Z direction at bottom minimum in fixed support is 22.21 KN-m.
2) Fixed but support maximum bending moment for soft soil is (152.73 KN-m) medium soil (121.01 KN-m) and soft soil (93.68 KN-m).
3) From the above analysis soil structure more affected on soft soil. So overcome the effects of the soil structure interaction on the soft soil, it is important to design the structure to standard loading condition and interaction forces.