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JET 2018
ISSN: 2319-9873
I n t e r n a t i o n a l C o n f e r e n c e o n
Structural and Civil Engineering
Research
O c t o b e r 0 1 - 0 2 , 2 0 1 8
Am s t e r d a m , N e t h e r l a n d s
Civil Engineering 2018
N
atural phenomenon like earthquakes can cause large amount of damage to structures as well as to human lives. Phenomenon
related to earthquake like soil liquefaction pose even higher threat as its consequences can be more disastrous. It is
therefore essential to characterize these ground motions, in order to predict their damage potential and to suggest concrete
measures to minimize their catastrophic effects. Subsoil strata of any particular region play a vital role in understanding the
effect of earthquake to substructures and super structures. In this paper, liquefaction analysis study has been carried out for
a representative site situated in north India which lies in seismic zone-III as per seismic zonation map of India (IS 1893:2002).
Liquefaction susceptibility of soil can be assessed by determining the factor of safety (FOS) which is the ratio of cyclic resistance
ratio (CRR) and cyclic stress ratio (CSR). CRR of soil has been determined using field data obtained from standard penetration
test (SPT) following the NCEER approach (2001). 95 percentile values of field data, such as, N-value, soil density and fines
content have been assessed at different depths for calculating CRR. CRR is also determined by use of empirical relationships
given by Seed and Idriss (1984). CSR has been assessed by performing 1D nonlinear effective stress ground response analysis
with pore water pressure dissipation, and by performing equivalent linear analysis. Spectrum compatible time history obtained
from site specific ground response spectra have been used to perform the nonlinear dynamic analysis using time integration
technique in DEEPSOIL (2016). A comparison between equivalent linear and nonlinear approach to assess cyclic stress ratio has
been conducted. The relation of factor of safety with depth of strata, obtained by the performing site specific response analysis
and tests is compared with FOS obtained by the empirical procedure given by Seed and Idriss (1984) in the paper.
bhatiasgurpreet09@gmail.comLiquefaction potential assessment of alluvial soil
site using 1D nonlinear ground response analysis
Bhatia G S
1
, Bhargava K
2
, Parulekar Y M
3
and Mondal A
1
1
Nuclear Power Corporation of India, India
2
Homi Bhabha National Institute-Bhabha Atomic Research Centre, India
3
Bhabha Atomic Research Centre, India
JET 2018 Volume: 7