VARIATION OF THE DYNAMIC PROPERTY OF A RECLAIMED GROUND DUE TO SUBSURFACE COMPLEXITIES
Although the reclaimed land has a completely flat landform, its predominant frequency varies a lot with location, according to our survey based on the microtremor measurement. The objective of this study is to account for this dynamic characteristic locality in the reclaimed land. In order for this, a large number of soil investigation data have been collected and a series of microtremor measurements have been conducted. From this study, it was found that: (1) the topography in the old times which is buried underground is the determining factor of the dynamic characteristics of the reclaimed land, (2) the predominant frequency corresponds to its scale, (3) the H/V spectrum has a sharp peak when the soil stiffness shows a remarkable change, (4) however,the spectral shape of microtremors does not have a sharp peak when the soil stiffness shows a gradual change.
Soil Structure Irregularity Microtremor Measurement Finite Element Analysis
S. NAKAI Y. NAGATA T. OHTA T. SEKIGUCHI
Graduate School of Engineering, Chiba University, Chiba, 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）