掲載雑誌（和）： 日本地震工学シンポジウム講演集 Vol： 6巻 年： 1982年 頁： 457-464頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Yorihiko OHSAKI, Makoto WATABE, Masanobu TOHDO, lzuru OHKAWA タイトル（英）： CHARACTERISTICS OF SURFACE GROUND MOTIONS CONSIDERING THE VARIOUS PROPERTY COMBINATIONS OF SUBSOILS AND EARTHQUAKES 抄録（英）：
The behavior of soil deposits, when subjected to earthquakes, can properly computed by use of some practical method which consider the nonlinear material properties of soils. However, the generalized illustrations of the surface ground motions in terms of the characteristics of the incident earthquake motions at the so-called base layer and the compositions of the soil substructure have scarcely been done, because of the difficulties in making the appropriate specification of the input earthquake motions. In this paper, at first, the response analyses in time domain for two types of soil conditions, I.e., soft and hard, are preliminarily made to examine the effect of strain levels. In the analysis, the modified earthquake records with various intensities from the above earthquake are used as the input ground motions at the bed rock. As the result, it has been found that the difference in responses between soft and hard soils varies according to the intensity of input earthquake motions. The peak in the acceleration response for the hard soil, for example, is larger than for the soft soil in case of the input motion with the intensity equal to 1.5 times the original one and, for smaller intensity, the effect is inverse. Furthermore, three possible intensities of input earthquake ground motions are determined so as to correspond to the magnitude 7.0, 7.5 and 8.0 with the identical epicentral distance of 50 km and the subsoil conditions of a number of geological data are classified into several types with respect to their fundamental periods. Using both the input motions and the soil profiles thus determined and selected, the surface ground motions are computed. Consequently, the general tendencies of the dynamic behaviors of surface ground motions are illustrated. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集