Proposal of Vector Frequency Response Function of Ground Based on Vector Spectrum and Its Application

Nakamura, Susumu

doi:10.2208/jscej.1995.519_161

Cited by 1 publication

(1 citation statement)

References 8 publications

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“…The same aftershocks are also recorded at the Port Island vertical array that is located about 2 km from the site. The S-wave velocity structure at the site is determined by fitting the transfer function calculated by the one-dimensional multiple reflection theory to the ratio of the vector spectrum (Nakamura, 1995) of the aftershocks at Fukiai to that at Port Island (GL-83 m) shown in Fig. 15, all of which is shown in Table 4.…”

Section: Fukiaimentioning

confidence: 99%

Nonlinear Behavior of Surface Deposit During the 1995 Hyogoken-Nambu Earthquake

Suetomi

Yoshida

1998

SOILS AND FOUNDATIONS

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Behavior of the ground during the 1995 Hyogoken-Nambu earthquake is investigated through various analyses on and comparisons with the earthquake records. Behavior of the Holocene clay, a soft clay layer, as well as the fill, the liquefied layer, is shown to affect the response of the ground significantly through effective stress analysis. Earthquake response analysis carried out on the section passing the Sannomiya station indicates that the existence of the Holocene clay and its thickness controls the response of the ground surface to a great degree. It is also shown that there was no deamplification effect caused by the nonlinear behavior of the soil in the area called the damage belt, where damage to houses was especially severe. Incident waves on the top of the upper Osaka Group formation are estimated for several sites where earthquake records were obtained by deconvolution analysis. Their waveforms on the base layer are very similar to each other in a narrow region a few kilometers wide, but are different from those at distant sites, although their PGV are nearly the same at about 80 cm/s. It is shown that the ground shaking observed at the 1995 Hyogoken-Nambu earthquake was characterized mainly by the surface geology, and that it was are controlled by the nonlinear behavior of the soft clay layer and liquefaction of fill.

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Section: Fukiaimentioning

confidence: 99%