000019825 001__ 19825
000019825 005__ 20170118182338.0
000019825 04107 $$aeng
000019825 046__ $$k2017-01-09
000019825 100__ $$aSigurðsson, Guðmundur
000019825 24500 $$aSite Response Evaluation in a Volcanic Area Using H/V and 1D Wave Propagation Analysis

000019825 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019825 260__ $$b
000019825 506__ $$arestricted
000019825 520__ $$2eng$$aThis contribution presents some results of a detailed site response analysis in a proposed wind farm site in South Iceland. The area under study is a valley Northwest of Mount Hekla in South Iceland, and the sites consist of layers of soft sand mixed with scoria/tephra sandwiched between layers of very stiff basalt. The analysis is based on Horizontal to Vertical Spectral Ratios (HVSR) of ambient vibrations as well as one dimensional equivalent linear wave propagation analysis. Wave propagation analysis, also known as site response analysis, is based on geotechnical data from the study area, mostly in the form of borehole logs. Fundamental site vibration frequencies obtained from HVSR and site response analysis were found to be consistent throughout the study area. Site fundamental frequencies inferred from average shear wave velocity in the upper 30m of the sites were found to be significantly larger—4 times on the average—than those inferred from elastic transfer functions. The response of the sites under several pulse-like and ordinary ground motions was computed. The results indicate that inelastic deformations of the soft layers cause reduction in fundamental frequencies of the sites and the corresponding amplification factors. This reduction was found to be strongly correlated with peak ground velocity of pulselike ground motions and peak ground acceleration of ordinary ground motions.

000019825 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019825 653__ $$aSite-response analysis; HVSR; Ambient vibrations; Seismic ground motion; Site amplification

000019825 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019825 720__ $$aSigurðsson, Guðmundur$$iRupakhety, Rajesh$$iÓlafsson, Símon
000019825 8560_ $$ffischerc@itam.cas.cz
000019825 8564_ $$s1390944$$uhttps://invenio.itam.cas.cz/record/19825/files/4495.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4495.
000019825 962__ $$r16048
000019825 980__ $$aPAPER