研究者詳細 - 西村　伸一

MISC - 西村　伸一

分割表示 172 件中 41 - 60 件目／全件表示 >>

Risk Evaluation of Earth Dam Breaches due to Heavy Rains with Use of Response Surface Method 査読

Nishimura S, Mizuma K, Shuku T, Shibata T

Proc. of the 12th International Conference on Structural Safety and Reliability, ICOSSAR2017 2300 - 2308 2017年8月

CPTによるため池堤体内部N値の空間分布推定

今出和成, 西村伸一, 珠玖隆行, 柴田俊文, 村上章, 藤澤和謙

平成28年度農業農村工学会大会講演会 2016年8月

Prediction of Long-term Consolidation Behavior Considering Nonlinearity and Spatial Variability of Soil Parameters 査読

S. Nishimura, T. Shibata, T. Shuku

Proc.of the 6th Asian-Pacific Symposium on Structural Reliability and its Applications, APSSRA2016 630 - 635 2016年5月

Estimation of Hydraulic Conductivity in an Embankment Using Particle Filter 査読

K. Fujisawa, A. Muarakami, S. Nishimura

Proc. of the 6th Asian-Pacific Symposium on Structural Reliability and its Applications, APSSRA2016 618 - 623 2016年5月

ため池の地震時リスク評価 (小特集ため池の耐震性能診断と保全管理戦略)

西村伸一, 柴田俊文, 珠玖隆行

水土の知 : 農業農村工学会誌 83 ( 12 ) 1027 - 1030 2015年12月

斜面崩壊における偶然的不確定性の評価

珠玖隆行, 吉田郁政, 西村伸一

計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 20 6p 2015年6月

Evaluation of strength of soft ground improved by vacuum consolidation

T. Shibata, S. Nishimura, M. Fujii, A. Murakami

Geotechnical Engineering 46 95 - 102 2015年1月

This paper presents the numerical evaluation of the strength and stability of a ground improved via vacuum consolidation combined with a preloading embankment. To assess the stability of soft grounds, the undrained shear strength is definitely required. A numerical analysis is desirable for predicting the strength of the improved ground, and the elasto-plastic FEM for soil-water coupled problems, incorporating the SYS Cam-clay model, is adopted in two dimensions. The compression index of clay and the coefficient of permeability of organic soil, which are the primary factors for evaluating the ground behavior, are identified through an inverse analysis from the measured settlements. As the inverse approach, the particle filter is employed to account for the strong nonlinearity of the ground behavior. A stability analysis of the slip surface method is performed based on the evaluated undrained shear strength to assess the effect of the ground improvement on the construction of earth structures. The results show the validity of the ground improvement using vacuum consolidation with a preloading embankment.

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Reliability-based design for earth-fill dams against heavy rains

Shin-Ichi Nishimura, Takayuki Shuku, Toshifumi Shibata, Kazunori Fujisawa

15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability 2440 - 2444 2015年

記述言語：英語出版者・発行元：Asian Regional Conference on Soil Mechanics and Geotechnical Engineering

To mitigate the disasters of decrepit earth-fill dams, improvement work is conducted. Since there is a recent demand for low-cost improvements, the development of a design method for optimum improvement work at a low cost is the final objective of this research. The reliability-based design approach is discussed as such a design method. Heavy rains are the most serious events for aged fill-dams, and sometimes overflows leading to breaching occur. From the estimated probability of overflow, the probability of submergence in the downstream is estimated for the reliability-based design. The remarkable point in this paper is that the probability of occurrences of heavy rains and the uncertainty of the soil properties are simultaneously considered for the design. Considering the disaster loss, the risk of submergence could be assessed.

DOI： 10.3208/jgssp.JPN-044

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静的コーン貫入試験(CPT)によるため池堤体の強度分布推定

上田航平, 西村伸一, 珠玖隆行, 柴田俊文, 村上章, 藤澤和謙

第49回地盤工学研究発表会 2014年7月

Reliability-based design of earth-fill dams considering probability of heavy rains and uncertainty of soil properties

S. Nishimura, H. Nagao, K. Fujisawa, T. Shuku, T. Shibata

The 1st International Conference on Computational Engineering and Science for Safety and Environmental Problems 2014年5月

Parameter and model identification using the particle filter for geotechnical applications

A. Murakami, K. Fujisawa, S. Ohno, T. Shuku, S. Nishimura

14th International conference of the International Association for Computer Methods and Advances in Geomechanics 51 - 60 2014年

907 地盤解析を対象としたデータ同化における誤差分散共分散行列の推定

珠玖隆行, 西村伸一

計算力学講演会講演論文集 2013 ( 26 ) "907 - 1"-"907-2" 2013年11月

3成分コーン貫入試験によるため池堤体の物性評価

上田航平, 西村伸一, 珠玖隆行, 村上章, 藤澤和謙, 二木重博, 西村輝

第68回農業農村工学会中国四国支部講演会 127 - 129 2013年10月

地盤工学会論文賞(英文部門)を受賞して

珠玖隆行, 村上章, 藤澤和謙, 西村伸一, 中村和幸

地盤工学会誌 = / the Japanese Geotechnical Society 61 ( 8 ) 58 - 58 2013年8月

斜面構造物の洪水時における下流域のリスク評価

西村伸一, 珠玖隆行, 長尾遥奈, 藤澤和謙

第48回地盤工学研究発表会 79 - 80 2013年7月

粒子法によるニューマチックケーソンの施工過程解析

珠玖隆行, 西村伸一, 川崎元, 尾形恒夫, 藤澤和謙

第48回地盤工学研究発表会 1005 - 1006 2013年7月

有限体積法によるDarcy流とNavier-Stokes式の同時解析

藤澤和謙, 村上章, 西村伸一, 珠玖隆行

第18回計算工学講演会 18 4p 2013年6月

局所載荷模型実験結果に基づく二次圧密挙動の予測

山田典弘, 西村伸一, 珠玖隆行, 藤澤和謙

第62回理論応用力学講演会 2013年3月

Data assimilation strategies for parameter identification of elasto-plastic geomaterials and its application to geotechnical practice

T. Shuku, S. Nishimura, A. Murakami, K. Fujisawa

The 18th International Conference on Soil Mechanics and Geotechnical Engineering 1897 - 1900 2013年

Prediction of multi-dimensional consolidation behavior based on the observed values

S. Nishimura, T. Shuku, K. Fujisawa

New Advances in Geotechnical Engineering, Proc. of the 5thChina - Japan Geotechnical Symposium 333 - 338 2013年

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