3th WCSET-2014 at Nepal
Civil Engineering / Environmental / Architecture / Planning Session:
Title:
Soil-Structure Interaction Analysis of Reinforced
Concrete Buildings with Various Shapes of Shear Wall – A
comparative study of various international seismic code
provisions
Authors:
Chinmayi H. K., Jayalekshmi B. R.
Abstract:
Conventional structural design practice assumes the base
of structures to be fixed by neglecting the effect of
soil-structure interaction (SSI). During earthquakes,
structural displacements and ground displacements are
interdependent of each other. This mutual dependency of
the structure and soil behaviour is termed as SSI. It is
unrealistic to analyse structure by considering it to be
fixed. Hence present study looks into the effect of soil
flexibility on variation in natural period, spectral
acceleration coefficient, and base shear obtained by
adopting the seismic provisions of Indian seismic code
(IS 1893) and International building code (IBC) in
multi-storey reinforced concrete framed buildings with
different aspect ratio having rectangular, channel and
cylindrical shapes of shear walls over raft foundation.
Analysis of 3D models with these three different shear
wall shapes founded on four different soil types
categorized based on shear wave velocity are been
carried out using finite element software LS DYNA. The
results show that the SSI effects are substantial in
altering the seismic response. The base shear in
cylindrical shape shear wall buildings is lowest for
buildings with aspect ratio below 3 when compared with
other shapes of shear walls.
Keywords: Base
shear, Shear Wall, Soil-structure interaction, Spectral
acceleration coefficient
Pages:
094-099