000018624 001__ 18624
000018624 005__ 20170118182231.0
000018624 04107 $$aeng
000018624 046__ $$k2017-01-09
000018624 100__ $$aAdhikari, Sujan
000018624 24500 $$aUse of Ambient Vibration Methods for Post-Earthquake Geotechnical Reconnaissance in Kathmandu, Nepal

000018624 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018624 260__ $$b
000018624 506__ $$arestricted
000018624 520__ $$2eng$$aThe Canadian Association of Earthquake Engineering sent a seven member team to Kathmandu, Nepal, following the 2015 M7.8 Gorkha earthquake. The M7.8 Gorkha earthquake of 25 April 2015 resulted in ~8800 fatalities and structural damage of ~600,000 buildings. A set of five small Tromino seismographs were brought to Nepal to obtain a crude reconnaissance of potential earthquake site response across Kathmandu. Individual sensor measurements were conducted in several locations across Kathmandu – in locations of minimal to heavy structural damage. Microtremor horizontal-to-vertical spectral ratios (MHVSR) are computed for each individual measurement to obtain an estimate of site period (fundamental frequency) of the subsurface soils. Three groupings of MHVSR response are observed: (1) moderate-to-high amplification at distinct frequencies occurs in locations of heavy structural damage or collapse, (2) low, broad amplification is observed in locations with minimal structural damage, and (3) moderate amplification at high frequencies is observed atop topographic hills and/or rock sites. All five Tromino sensors were also deployed, together as an array, in select locations of Kathmandu for measurement of surface wave dispersion. This paper presents application of surface seismic field techniques for postearthquake geotechnical reconnaissance purposes in Kathmandu, Nepal.

000018624 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018624 653__ $$aseismic microzonation, microtremors, amplification, earthquake site class.

000018624 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018624 720__ $$aAdhikari, Sujan$$iMolnar, Sheri$$iOnwuemeka, John
000018624 8560_ $$ffischerc@itam.cas.cz
000018624 8564_ $$s2059744$$uhttps://invenio.itam.cas.cz/record/18624/files/1869.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1869.
000018624 962__ $$r16048
000018624 980__ $$aPAPER