研究者詳細 - 西村　伸一

論文 - 西村　伸一

分割表示 163 件中 141 - 160 件目／全件表示 >>

Slope stability analysis considering reduction of shear strength of unsaturated soil due to rain infiltration 査読

Shimada, K, Morii, T, Fujii, H, Nishimura, S

Trans. of JSIDRE 67 ( 6 ) 93 - 98 1999年

Change of shear strength of unsaturated decomposed granite soils with matric suction 査読

Shimada, K, Fujii, H, Nishimura, S

Trans. of JSIDRE 67 ( 3 ) 99 - 104 1999年

Slope instability due to rainfall and earthquake 査読

K Shimada, H Fujii, S Nishimura, T Nishiyama, T Morii

SLOPE STABILITY ENGINEERING, VOLS 1 & 2 653 - 656 1999年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：A A BALKEMA PUBLISHERS

This paper discusses the coincident effects of rainfall and earthquake on the slope stability. A numerical program for the analysis of the slope instability due to rainfall has been already developed. The program unites a finite element program for the infiltration analysis and a Rigid-Body-Spring-Model (RBSM) program for the slope stability analysis. The numerical results for a model slope show that the reduction of the shear strength of the slope surface soil due to rain infiltration causes the reduction of the safety factor of the slope. When the slope suffers from both rainfall and earthquake, its safety factor will decrease more and it must become more unstable. The effect of seismicity is taken into account by applying the additional horizontal seismic force in RBSM as the pseudo-static limit equilibrium procedure of the slope stability analysis. The calculation results show that the slope suffering from the rain infiltration becomes more unstable when the additional seismic force acts. The greater magnitude of the seismic intensity strongly reduces the safety factor of the model slope.

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Hysteresis effect of decomposed granite soil on slope instability due to rainfall 査読

K Shimada, H Fujii, S Nishimura, T Nishiyama, T Morii

EIGHTH INTERNATIONAL CONGRESS INTERNATIONAL ASSOCIATION FOR ENGINEERING GEOLOGY AND THE ENVIRONMENT, PROCEEDINGS, VOLS 1-5 1981 - 1986 1998年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：A A BALKEMA PUBLISHERS

This paper discusses the effect of hysteresis in soil-water characteristic curves of decomposed granite soils on the instability of their unsaturated slopes due to rain infiltration, using the numerical analysis. Almost all soils exhibit hysteresis in soil-water characteristic curves, and the curves are ordinarily measured in the drying process because of the simplicity of measurement. However, the numerical results indicate that the curve measured in the drying process gives incorrect estimates for the slope instability due to rain infiltration. In conclusion, the soil-water characteristic curves of soils should be measured in the wetting process when applied to the slope stability analysis considering rain infiltration.

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液状化対策地盤改良に関する信頼性設計

西村伸一, 清水英良, 藤井弘章, 島田清

土木学会論文集 603 ( 603 ) 101 - 111 1998年

兵庫県南部地震による被災ため池の解析〜井戸の尻池を例として〜

西村伸一, 島田清, 藤井弘章, 堀俊男

地盤と建設 16 ( 1 ) 57 - 62 1998年

Stability analysis of unsaturated slopes considering changes of matric suction 査読

K Shimada, H Fujii, S Nishimura, T Morii

UNSATURATED SOILS, VOLS 1 AND 2 293 - 299 1995年

地すべり挙動の弾粘塑性有限要素解析

藤井弘章, 西村伸一, 堀俊男, 島田清

地すべり 31 ( 4 ) 1 - 8 1995年

記述言語：日本語出版者・発行元：The Japan Landslide Society

弾粘塑性FEMによる本解析手法は, 土質試験からのパラメータを用いた解析値と各種移動量の実測値を比較することによって成立しており, 多くの地すべり地の解析に実用的であると思われる。今後の解析事例の集積により地すべり挙動予測への貴重なアプローチとなり得るものと思われる。

DOI： 10.3313/jls1964.31.4_1

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00032119749?from=CiNii

Sensitivity analysis of earth-filled dams based on experimental design 査読

Shuku, T, Nishimura, S, Shibata, T

Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 83 ( 4 ) II_77 - II_82 1995年

STUDIES ON NEUROSTEROIDS .2. RETENTION BEHAVIOR OF DERIVATIZED 20-OXOSTEROIDS AND THEIR SULFATES USING HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY 査読

K SHIMADA, S NISHIMURA

JOURNAL OF LIQUID CHROMATOGRAPHY 18 ( 9 ) 1691 - 1701 1995年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MARCEL DEKKER INC

The retention behavior of five 20-oxosteroids (pregnenolone, 3 beta - hydroxy- 5 alpha -pregnan-20-one, 3 beta -hydroxy- 5 beta - pregnan-20-one, 3 alpha -hydroxy- 5 alpha -pregnan-20-one, and 3 alpha - hydroxy-5 beta -pregnan-20-one) and their sulfates derivatized with 4-(N,N-dimethylaminosulfonyl)- 7-hydrazino-2,1,3-benzoxadiazole were examined using reversed-phase high-performance liquid chromatography with fluorescence detection. Inclusion chromatography using cyclodextrin as a mobile phase additive was also used for this purpose and found effective in separating the isomeric derivatized 20-oxosteroids and their sulfates.

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農業土木と軟弱地盤対策(その9)-児島湾・笠岡湾干拓地の土性と地盤改良の数値解析例-

藤井弘章, 島田清, 西村伸一

農業土木学会誌 63 ( 5 ) 513 - 520 1995年