The Relationship Between Fill-Depths Based on GIS Estimation, Earthquake Damage and the Micro-Tremor Property of a Developed Hill Residential Area

Abstract eng:
Following the 2001 Geiyo earthquake, which measured 6.7 on the Richter Scale, a lot of damage to the tiled roof of wooden houses occurred. This damage was more prevalent among houses in the fill part of the hillside, rather than the cut part. The developed area is classified as either a fill part, or cut part, based on GIS (Geographic information systems) technique. Based on the micro-tremor measurement of the ground, the ratio of the horizontal spectrum to the vertical spectrum, known as H/V, was investigated. The H/V ratio reaches a peak of approximately 2-4Hz in the fill part, but it has no predominant frequency on the cut part. It is probable that the damage done to houses with tiled roofs following the 2001 Geiyo earthquake is strongly affected to the H/V predominant frequencies found in the developed hill residential area.

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