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- W2008448454 abstract "For assessing earthquake hazard of metro cities, knowledge of soil amplification, thickness and properties of sedimentary layer are essential. In order to map the soil thickness using microtremor survey method, in Bangalore city, it is required to calibrate the relation between fundamental resonance frequency of the soil layer and its thickness for the region. For this purpose microtremor survey was carried out at 34 locations in the city where borehole log was available. The resonance frequency of the soil is evaluated from the microtremor recordings using the H/V ratio technique. A nonlinear regression relation between the thickness of sedimentary layer h (m), from the borehole logs, and the resonance frequency fr (Hz), was derived as h=(58.3±8.8)fr−(0.95)±0.1. Using the model of shear wave velocity increasing with depth at these locations, the derived average shear wave velocity and the corresponding soil thickness were used, to get an empirical relation between VS (m/s) and depth z(m), as Vs=(174±28)(1+z)0.16±0.07. This relation also compares reasonably with the fit obtained between simulated VS and depth from borehole logs for Bangalore city. The calibrated relations can be used at locations in Bangalore city where borehole logs are not available, for finding the thicknesses and shear wave velocities of the local soil layers at the survey locations." @default.
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- W2008448454 date "2010-11-01" @default.
- W2008448454 modified "2023-10-16" @default.
- W2008448454 title "Estimation of sedimentary layer shear wave velocity using micro-tremor H/V ratio measurements for Bangalore city" @default.
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- W2008448454 doi "https://doi.org/10.1016/j.soildyn.2010.06.012" @default.
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