Earthquakes and Structures

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Effect of soil-structure interaction for a building isolated with FPS

  • Krishnamoorthy, A. (Department of Civil Engineering, Manipal Institute of Technology)
  • Received : 2011.07.06
  • Accepted : 2012.06.09
  • Published : 2013.03.25
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Abstract

The effect of soil structure interaction (SSI) on seismic response of a multi-degree-of-freedom structure isolated with a friction pendulum system (FPS) is studied. In the analysis, the soil is considered as an elastic continuum and is modeled using the finite element method. The effect of SSI on response of the structure is evaluated for twenty far-field and twenty near-fault earthquake ground motions. The effect of friction coefficient of sliding material of FPS on SSI is also studied. The results of the study show that the seismic response of the structure increases for majority of the earthquake ground motions due to SSI. The sliding displacement and base shear are underestimated if SSI effects are ignored in the seismic analysis of structures isolated with FPS.

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References

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