@article{oai:muroran-it.repo.nii.ac.jp:00005468,
 author = {三上, 敬司 and MIKAMI, Takashi and 能町, 純雄 and NOMACHI, Sumio and MATSUOKA,  Ken-ichi and 松岡, 健一 and KISHI,  Norimitsu and 岸, 徳光},
 journal = {構造工学論文集. A},
 month = {Mar},
 note = {application/pdf, This research is concerned in the impact force caused by rock falls. A lot of structures to prevent the falls have been constructed in the mountain and along the coast. However, the design concent of these structures is due to the experiential engineering taking different situation to construct each structure into account. In this paper, we analyzed theoretically the impulsive acceleration and the penetration of a model weight into a sand cushion. reffering to the test conducted by Yoshida, which was a model modified the rock falls on a flat sand layer. The relationships between the impulsive acceleration and the falling height, the impulsive acceleration and the ratio of falling height to penetration into the sand, the impulsive time and the impact force were studied respectively. They were compared with the test results measured by Yoshida. Authors propose the four element model with virtual mass, and it leads to the results which comparatively is in good agreement with those of the model experiment. As a result, authors estimate the impact force induced at the bottom of the sand layer which touches at the surface of the rock fall protection structure.},
 pages = {559--569},
 title = {落石による落石覆工への衝撃力に関する評価},
 volume = {33},
 year = {1987},
 yomi = {ミカミ, タカシ and ノウマチ, スミオ and マツオカ, ケンイチ and キシ, ノリミツ}
}