TY - JOUR
T1 - Refinement and application of an estimation procedure for site natural periods using microtremor
AU - Ohmachi, Tatsuo
AU - Konno, Katsuaki
AU - Endoh, Tatsuya
AU - Toshinawa, Takumi
PY - 1994
Y1 - 1994
N2 - Based on recent studies suggesting that Rayleigh waves are observable in microtremor ground motions, an improved procedure is proposed to estimate a natural period of a site using amplitude ratios between horizontal and vertical motion of the microtremors. The procedure is to make the best use of not only peaks but also troughs in a spectral amplitude ratio. Using microtremor data measured at all junior high schools in 23 wards of Tokyo, the proposed procedure is applied to a period-mapping of the area and compared with an existing map to a satisfactory level of accuracy, demonstrating its practicality.
AB - Based on recent studies suggesting that Rayleigh waves are observable in microtremor ground motions, an improved procedure is proposed to estimate a natural period of a site using amplitude ratios between horizontal and vertical motion of the microtremors. The procedure is to make the best use of not only peaks but also troughs in a spectral amplitude ratio. Using microtremor data measured at all junior high schools in 23 wards of Tokyo, the proposed procedure is applied to a period-mapping of the area and compared with an existing map to a satisfactory level of accuracy, demonstrating its practicality.
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U2 - 10.2208/jscej.1994.489_251
DO - 10.2208/jscej.1994.489_251
M3 - Article
AN - SCOPUS:0028015287
SN - 0289-7806
SP - 251
EP - 260
JO - Doboku Gakkai Rombun-Hokokushu/Proceedings of the Japan Society of Civil Engineers
JF - Doboku Gakkai Rombun-Hokokushu/Proceedings of the Japan Society of Civil Engineers
IS - 489 pt 1-27
ER -