Field observations on ground motions from recent earthquakes imply that current knowledge is limited with regard to relating vertical and horizontal motions at liqueยฎable sites. This paper describes a study with the purpose of clarifying this emerging issue to some extent. A series of numerical anal
Near-field horizontal and vertical earthquake ground motions
โ Scribed by N.N Ambraseys; J Douglas
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 661 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0267-7261
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โฆ Synopsis
Strong-motion attenuation relationships are presented for peak ground acceleration, spectral acceleration, energy density, maximum absolute input energy for horizontal and vertical directions and for the ratio of vertical to horizontal of these ground motion parameters. These equations were derived using a worldwide dataset of 186 strong-motion records recorded with 15 km of the surface projection of earthquakes between M s ยผ 5:8 and 7.8. The effect of local site conditions and focal mechanism is included in some of these equations.
๐ SIMILAR VOLUMES
Ground motions a!ected by directivity focusing at near-"eld stations contain distinct pulses in acceleration, velocity, and displacement histories. For the same Peak Ground Acceleration (PGA) and duration of shaking, ground motions with directivity pulses can generate much higher base shears, inter-