A MODEL OF GROUND STRUCTURE TO ESTIMAGE EARTHQUAKE GROUND MOTIONS AROUND HSINCHU CITY, TAIWAN ON THE BASIS OF GRAVITY AND MICROTREMOR SURVEYS
To estimate the three-dimensional ground structure over a large area, the combination of gravity and microtremor surveys are useful and can provide good information without much cost. We applied these survey techniques to the area around Hsinchu, Taiwan, where is one of most important industrial area in Taiwan, to provide a basic information for earthquake disaster mitigation.For this, the gravity and microtoremor surveys have been carried out in the target area. Observations of gravity at 393 sites was done and the structure with some di.erent scales are found from the Bouguer anomaly. The trend of the Bouguer anomaly is independent of the topography and some localized structures are observed. Furthermore,shallow structures were estimated from microtoremor data of array observation at some sites.As a result, the depth to bedrock is steeply variated from north-western to south-eastern area. The shape of the surface of bedrock represents the good agreement with the known geological information such as faults, anti- and syncline, and so on.
gravity survey microtremor surbey subsurface structure bedrock Hsinchu
H. Morikawa M. Komazawa H.-T. Chen C. Takahashi T. Shosaka H. Kawatsure
Department of Built Environment, Tokyo Institute of Technology, Yokohama, Japan Geological Survey of Japan, Advanced Industrial Science and Technology, Tsukuba, Japan Department of Civil Engineering, National Central University, Jhongli, Taiwan, Republic of China Tokyu Corporation, Tokyo, Japan Local Government of Mie Prefecture, Tsu, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）