We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Site Characterization of Urban Centers from Himalayan Region Using Active and Passive Seismic Methods.
- Authors
Mahajan, Ambrish Kumar; Patial, Rajeev; Kumar, Praveen; Sharma, Harsh; Sharma, Dhaneshwari; Kundal, Komal; Priyanka, Kaulash
- Abstract
Active and passive seismic survey was performed in Kangra valley using three different methods i.e. Horizontal-to-Vertical Spectral Ratio (HVSR), Multiple simulations with one receiver (MSOR) and Multichannel analysis of surface waves (MASW) for seismic site characterization. The ambient noise measurements (HVSR) analysis from 200 sites reveals variation in fundamental frequency (f0) and amplification (A0) from 3 to 11 Hz and 2 to 6 respectively. The joint-fit-inversion technique was used to invert HVSR curve with intial information obtained dispersion curves on stiffness parameters using MSOR from same site and derived 1-D shear wave velocity (Vs) profile. Further, MASW survey was performed to get 2-D Vs profile indicating lateral and vertical variation to identify presence of dissolution feautres underneath. The Vs map of the valley suggests the variation in Vs from 200 to 800 m/s and indicated that Kangra valley falls under class 'C' and 'D' as per NEHRP classification. The 1-D Vs profile derived by inverting HVSR curves is found to be in good agreements with Vs information derived using MASW method. The response analysis for a given magnitude value (mb 6.8) of each site indicated site amplification variation from 0.6 (site 2) to 0.168 (site 50) and natural period of sites vary from 0.10 (site 45) to 0.16 s (site 6). The Standard Spectral Ratio and Floor Spectral Ratio of bulidng having incorporated antiseismic measures were also studied and the results of the analysis reveals low to very low resonance.
- Subjects
HIMALAYA Mountains; SURFACE waves (Seismic waves); SEISMIC surveys; SHEAR waves; NOISE measurement; SURFACE analysis
- Publication
Geotechnical & Geological Engineering, 2024, Vol 42, Issue 2, p1105
- ISSN
0960-3182
- Publication type
Article
- DOI
10.1007/s10706-023-02608-0