Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Site condition evaluation using horizontal-to-vertical response spectral ratios of earthquakes in the NGA-West 2 and Japanese databases
Abstract We evaluate the usefulness of the horizontal-to-vertical (H/V) response spectral ratio as a parameter to describe site response. In particular we compare its effectiveness with that of the time-averaged shear-wave velocity to 30m (V S30), and also look at how those two measures are correlated. The evaluation is performed considering two major compiled ground-motion databases, one being the international NGA-West 2 database, and the other being a comprehensive database from Japan. A uniform procedure is applied to pick peak frequency (f peak) and peak amplitude (A peak) from the averaged H/V response spectral ratio for each site in the database. The H/V peak parameters are then grouped by their behavior, and the relationship of these peak parameters to V S30 are investigated by region. We conclude that: (1) H/V offers at least as much site information as V S30; (2) H/V is of more descriptive value than V S30 for deep soil sites, having f peak≤1Hz; and (3) the averaged H/V response spectral ratio for a site peaks at a specific frequency which is related to the depth of deposit, and has a stable peak amplitude of ~0.45 log10 units, independent of the region. We conclude that H/V has significant advantages over V S30 as a site description variable, and note that it is in general easier (less expensive) to obtain.
Highlights Explores the usefulness of H/V as a parameter to describe site response. Evaluates the relationship between H/V spectral ratio and V S30. Constructs a standard H/V spectrum that is a good generic site amplification curve. Discusses the advantages of H/V over V S30 as a site description variable.
Site condition evaluation using horizontal-to-vertical response spectral ratios of earthquakes in the NGA-West 2 and Japanese databases
Abstract We evaluate the usefulness of the horizontal-to-vertical (H/V) response spectral ratio as a parameter to describe site response. In particular we compare its effectiveness with that of the time-averaged shear-wave velocity to 30m (V S30), and also look at how those two measures are correlated. The evaluation is performed considering two major compiled ground-motion databases, one being the international NGA-West 2 database, and the other being a comprehensive database from Japan. A uniform procedure is applied to pick peak frequency (f peak) and peak amplitude (A peak) from the averaged H/V response spectral ratio for each site in the database. The H/V peak parameters are then grouped by their behavior, and the relationship of these peak parameters to V S30 are investigated by region. We conclude that: (1) H/V offers at least as much site information as V S30; (2) H/V is of more descriptive value than V S30 for deep soil sites, having f peak≤1Hz; and (3) the averaged H/V response spectral ratio for a site peaks at a specific frequency which is related to the depth of deposit, and has a stable peak amplitude of ~0.45 log10 units, independent of the region. We conclude that H/V has significant advantages over V S30 as a site description variable, and note that it is in general easier (less expensive) to obtain.
Highlights Explores the usefulness of H/V as a parameter to describe site response. Evaluates the relationship between H/V spectral ratio and V S30. Constructs a standard H/V spectrum that is a good generic site amplification curve. Discusses the advantages of H/V over V S30 as a site description variable.
Site condition evaluation using horizontal-to-vertical response spectral ratios of earthquakes in the NGA-West 2 and Japanese databases
Ghofrani, Hadi (Autor:in) / Atkinson, Gail M. (Autor:in)
Soil Dynamics and Earthquake Engineering ; 67 ; 30-43
31.08.2014
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 1999