2007•PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEANOpen access

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Takashi NAGAO, Kazuya HIRAMATSU, Akito Sone, Atsushi NOZU

Abstract

The input earthquake ground motion is going to be expressed as time histories considering source, path and site amplification effects especially due to the deep subsurface profile. Strong motion record and surface soil profile to the engineering bedrock is necessary for the evaluation of the site amplification factor. In this paper, we firstly show the method for evaluating the site amplification factor for sites with strong motion record and without surface soil profiles to the engineering bedrock by using microtremors. We next show the modification method of site amplification factor for sites that is a bit far away from the strong motion record site.

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Key concepts: Bedrock, Amplification factor, Geology, Ground motion, Seismology, Geomorphology, Engineering, Telecommunications