Local Site Effect of Kobe Based on Microtremor Measurement

[geotechnical_eng]

Local Site Effect of Kobe Based on Microtremor Measurement

Author: Yutaka Nakamura, Tsutomu Sato, and Masayuki Nishinaga | Size: 188 KB | Format: PDF | pages: 6

The Hyogo-Ken-Nanbu Earthquake caused heavy damage in Kobe city and its surrounding area. To clear the relationship between damage and local site effect, a month after the earthquake, microtremor measurement was performed for about a year. According to the measurement results in the damaged zone, the amplification factor (A) ranges between 2 and 3 which is not so high. However the predominant frequency (F) ranges between 1.5 and 2 Hz which corresponds to that of strong motion. Distribution
of vulnerability index Kg value for ground confirmed the damage belt.

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