3 0 0 0 OA ため池の越流破壊メカニズム
- 著者
- 藤澤 和謙 桃木 昌平 山本 清仁 小林 晃 青山 成康
- 出版者
- Japan Society of Civil Engineers
- 雑誌
- 応用力学論文集 (ISSN:13459139)
- 巻号頁・発行日
- vol.9, pp.385-394, 2006-08-25 (Released:2010-06-04)
- 参考文献数
- 8
- 被引用文献数
- 3 2
Studied herein is theoretical mechanism of the failure of an embankment caused by overflowing from a reservoir. An experiment has been conducted to observe the phenomenon, and the theory of the mechanism has been developed on the basis of the erosion and the stability of the slope subjected to the erosion. Shallow water equation considering the slope angle has been used to describe the erosion, and Mohr-Coulomb failure criterion has been applied to the stability analysis. The results allow the surface profile and the erosional speed to be determined as functions of imposed parameters. At the end of this paper, we have discussed the scope of application, and examined the theory by an additional experiment.
3 0 0 0 OA 三次元弾性波トモグラフィによるコンクリート構造物の健全性評価
- 著者
- 桃木 昌平 蔡 華堅 塩谷 智基 小林 義和 宮永 孝志
- 出版者
- 公益社団法人 土木学会
- 雑誌
- 構造工学論文集 A (ISSN:1881820X)
- 巻号頁・発行日
- vol.57A, pp.959-966, 2011 (Released:2011-08-01)
Ageing concrete structures have been significantly increasing. To sustain those, understanding the damages and decision the time and method of repairing is a crucial issue. Non-destructive testing (NDT) appears to contribute to this paramount issue, since it includes a variety of testing methods corresponding to the measurement scale. NDT also provides momentous information on the effects of repairing when the test is repeated after the repair work. In this study, seismic tomography, one of NDT methods, was applied for the damage quantification of full-scale concrete structures. The test was conducted both before and after repairing. The distributions of velocity led to a conclusion that the velocity variations represented well the effects of repairing.