Open AccessEffect of Linear Soil Condition on Seismic Inputs
Author(s) -
Shishir Bhattarai,
Prem Nath Maskey
Publication year - 2020
Publication title -
technical journal
Language(s) - English
Resource type - Journals
ISSN - 2676-1416
DOI - 10.3126/tj.v2i1.32829
Subject(s) - seismic hazard , peak ground acceleration , seismology , spectral acceleration , geology , response spectrum , spectral density , incremental dynamic analysis , monte carlo method , poisson distribution , acceleration , ground motion , mathematics , physics , statistics , classical mechanics
Seismic inputs to structures in terms of risk consistent response spectrum and seismic hazard curves are developed at bedrock level considering ten independent seismic source zone in the vicinity of the Kathmandu valley. The seismic hazard curve is derived by assuming temporal occurrence of earthquakes to follow Poisson model. Response spectrum is developed using an empirical relationship of spectral ordinates with magnitude of earthquakes and epicentral distance. The seismic risk factor is introduced in response spectrum using conditional probabilities. Power spectral density function consistent with response spectrum is derived and ground acceleration time histories are derived from power spectral density function using Monte Carlo technique. To obtain free field hazard curves and ground motion parameters, one dimensional wave propagation analysis is used for two different underlying soil conditions.