Application of H/V Spectral Ratio Method
Jyun-Yan Huang
Abstract
We usually uses the H/V spectral ratio method to analysis about local site effect, and we application this method to next two cases for different purpose.
In case one, there are two strong motion stations in the Taiwan Strong Motion Instrumentation Program (TSMIP) network, which located in Tatun mountain area, TAP056 and TAP066. They are close to each other for 2.5 kilometers apart, and we found the special phenomena is that one of them is often triggered by earthquakes and another is not, so we want to figure out what¡¦s the special site condition in this station.
We done the microtremor measurements near the station, and use the H/V spectral ratio method to analysis different site condition between two stations, and then find the reason of unusual large earthquake recorded.
In case two, during the huge earthquake occurred, it might have nonlinear site response in some places, and then we use the spectral ratio method to see the nonlinear site respond previously, and now we tried to demonstrate the H/V spectral ratio method can do the same research and done it easier. We use three borehole arrays data, two in Taiwan and one in Japan to identify of nonlinear site respond.Reference:
Kuo-Liang Wen, Che-Min Lin, Hsien-Jen Chiang, Chun-Hsiang Kuo,Yu-Chih Huang, and Hsin-Chieh Pu. Effect of Surface Geology on Ground Motions: The Case of Station TAP056 - Chutzuhu Site, Terr. Atmos. Ocean. Vol. 19, No. 5, 451-462, October 2008.
Kuo-Liang Wen, Tao-Ming Chang , Che-Min Lin, and Hsien-Jen Chiang. Identification of Nonlinear Site Response Using the H/V Spectral Ratio Method, Terr. Atmos. Ocean. Vol. 17, No. 3, 533-546, September 2006.