10.25394/PGS.11889150.v1
Dhrubajyoti Datta
Dhrubajyoti
Datta
Effect of non-linear soil structure interaction on the seismic response of critical infrastructure facilities
Purdue University Graduate School
2020
Soil Structure Interaction
Nuclear Power Plant
Fukushima Nuclear Power Plant
Geotechnical Engineering
Material Nonlinearity
Geometric Nonlinearity
Finite Element Analysis
Cyclic Direct Shear Tests
Soil Hysteresis
Structural Engineering
Civil Geotechnical Engineering
Earthquake Engineering
2020-03-10 17:17:22
Thesis
https://hammer.purdue.edu/articles/thesis/Effect_of_non-linear_soil_structure_interaction_on_the_seismic_response_of_critical_infrastructure_facilities/11889150
<div><p>Soil structure interaction plays a crucial role in the
behavior, analysis and design of heavy infrastructure of high importance such
as power plants, processing facilities, hospitals, precision engineering
facilities, hydraulic power infrastructure, etc. The change in frequency
content of the ground motion as seismic waves propagate through the subsoil might
result in the reduction or amplification of the response acceleration of
seismically excited structures. SSI has a significant influence on the
calculated in-structure response spectra (ISRS), and the calculated seismic design
demand forces. The fundamental hypothesis is that
nonlinearities at the soil-structure interface have the potential to influence
the peak acceleration demands due to energy dissipation. The sources of the
non-linearity include (i) non-linear structural behavior, (ii) non-linear soil
behavior and (iii) geometric non-linearities across the interface such as
gapping and sliding. The dissertation aims to establish a non-linear SSI
analysis methodology in time domain to understand the response of structural basemat
with respect to the free-field motion when subjected seismic excitation. The
contribution of each source of nonlinearity on the basemat response is examined
through an array of sensitivity studies. The numerical studies are carried out
on the Fukushima Daichii nuclear power plant in Japan with ground motion
history from the Tohoku earthquake. </p><br></div>