Faculty Profiles - NODA, Toshihiro

Papers - NODA, Toshihiro

Division display 161 - 180 of about 214 ／ All the affair displays >>

Progressive consolidation of highly structured clay under embankment loading Reviewed

Asaoka A., Noda T., Yamada E. and Tashiro M.

Proc. the 16th Int. Conference on Soil Mechanics and Geotechnical Engineering page： 1831-1835 2005.9

Language：English

A long-term continuous consolidation settlement often observed in a natural soft clay foundation is numerically simulated using "super/subloading elasto-plastic constitutive model." The settlement behavior was found to exhibit accelerated rate of settlement several times during consolidation with a rise of excess pore water pressure under a constant applied load after the completion of the embankment. The likely causes of this lie in the progressive decay of soil skeleton structure of the clay which causes "compression accompanied by softening."

Soil-water coupled elasto-plastic analysis on bearing capacity of naturally deposited clay soil Reviewed

Noda, T. and Yamada S.

Proc. the 16th Int. Conference on Soil Mechanics and Geotechnical Engineering page： 933-937 2005.9

Authorship：Lead author Language：English

To investigate a problem of bearing capacity of a natural clay, a soil-water coupled finite deformation analysis is performed with the elasto-plastic constitutive model that describes the effect of the decay of soil skeleton structure due to plastic deformation. From the computational results the findings are as follows: (1) In a structured clay soil, a load peak phenomenon appears, accompanied by a local circular slip field. (2) In a clay soil possessing anisotropy, this area of failure is more confined, and the peak is lower.

A soil-water coupled analysis on compaction of sandy ground

Noda, T., Yamada, E., Yamada, S. and Asaoka, A.

Geomechanics: Testing, Modeling, and Simulation, Geotechnical Special Publication No. 143 page： 269-285 2005.6

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The mechanism and characteristics of a static compaction pile method for sandy ground that is used as a measure against liquefaction, in which non-vibratory cavity expansion is gradually carried out from the bottom up, are numerically investigated using a soil-water coupled computation. The compaction procedure of the sandy ground is simulated employing a Super/subloading Yield Surface Cam-Clay model as an elasto-plastic constitutive model for sand. By introducing the concepts of soil structure, overconsolidation and stress-induced anisotropy and their evolutions, this model allows the description of a wide variety of sand behaviors using a single set of material parameters that are independent on density.
From the computational results, it is found that loose sandy ground is easily compacted/densificated because, in terms of sand elements, the soil structure of the sand is rapidly collapsed until the expansion takes place around the sand element and at the loading stages at which the casing pipe is driven in. Moreover, the shear characteristics of the ground are further improved because the overconsolidation ratio of the sand is increased cumulatively when the expansion is performed above the sand element and at the unloading stages at which the casing is pulled out.

Mechanical behaviour of structured clay and simulation

Shibuya, S. Li, D. Noda, T. and Nakano, M.

Geomechanics: Testing, Modeling, and Simulation, Geotechnical Special Publication No. 143 page： 286-306 2005.6

Elasto-plastic behavior of naturally deposited clay during/after sampling Reviewed

Noda, T., Yamada S. and Asaoka A.

Soils and Foundations Vol. 45 ( 1 ) page： 51-64 2005.2

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Changes in soil structure and overconsolidation in highly structured natural deposited clay as a result of sampling and setting in laboratory tests, together with their effects on the subsequent mechanical behavior, are numerically investigated in terms of unconventional elasto-plastic mechanics. To describe the mechanical behavior, a Super/subloading Yield Surface Cam-Clay model is employed. This model allows a description of the decay of soil structure, loss/increase of overconsolidation and evolution of anisotropy with ongoing plastic deformation from the process of the soil sampling through the unloading with swelling up to the subsequent tests.
The clay sample, after being collected, mounted on the test apparatus, and subjected to isotropic unloading and/or one-dimensional unloading with swelling down to the first stage vertical loading level, displays a response to some degree different from that of the soil at the original sampling site, in the following respects. An overconsolidated sample subjected to isotropic unloading with swelling will display rewinding behavior in a subsequent undrained tri-axial compression test, and “secondary consolidation"/“delayed compression" in a one-dimensional consolidation test. In contrast, a sample subjected to one-dimensional unloading with swelling will not become heavily overconsolidated but will remain in a state of either slight overconsolidation or normal consolidation accompanied by destructuration, and will display unloading at the beginning of a subsequent one-dimensional compression test. The most important thing to note from the testing viewpoint is that one-dimensional unloading with swelling gives better results than isotropic unloading, in the sense that the subsequent compression test is better able to predict the in-situ “consolidation yield stress".
Artificially disturbed clay subjected to repeated undrained shearing after sampling suffers a significant loss of structure. This results in a drop in

Simulation of shear and one-dimensional compression behavior of naturally deposited clays by Super/subloading Yield Surface Cam-Clay Model Reviewed

Nakano, M., Nakai, K., Noda, T. and Asaoka, A.

Soils and Foundations Vol. 45 ( 1 ) page： 141-151 2005.2

Elasto-plastic description of undrained shear behavior of sand depending on confining stress

Nakano, M., Noda, T., Nakai, K. and Asaoka A.

Proc. of. Int. Symposium on Plasticity 2005 page： 283-285 2005.1

Description of "compaction" and "liquefaction" behavior of sand based on evolution of soil skeleton structure

Nakai, K, Nakano, M., Noda, T. and Asaoka, A.

Proc. 2nd International Workshop on New Frontiers in Computational Geotechnics (IWS-Fortaleza) page： 29-32 2004.9

カムクレイモデルと骨格構造が発達した土の弾塑性モデル Open Access

野田利弘、山口栄輝、堤成一郎

土と基礎，地盤工学会 Vol. 52 ( 8 ) page： 10-12 2004.8

土の骨格構造の働きに着目した「擬似過圧密効果」の一考察 Reviewed Open Access

田代むつみ, 野田利弘,中野正樹

応用力学論文集，土木学会 Vol. 7 page： 589-596 2004.8

Mechanical behaviors of clay and sand in terms of active soil skeleton structure Reviewed

Asaoka, A., Noda, T. and Nakano, M.

Proc. Int. Conference on Computational & Experimental Engineering and Sciences (ICCES'04), Madeira, Portugal. page： 772-777 2004.7

Mechanical differences between sand and clay under monotonic and cyclic loading Reviewed

Noda, T., Nakano, M. and Asaoka, A.

Proc. Int. Conference on Cyclic Behaviour of Soils and Liquefaction Phenomena (CBS04), Bochum, Germany. page： 77-84 2004.3

Piled raft foundation behavior on a soft soil system Reviewed

Noda, T., Tashiro, M. and Asaoka, A.

Proc. Int. Symposium on Shallow Foundations (FONDSUP 2003), Paris. page： 209-212 2003.11

Delayed settlement behavior of naturally deposited clayey soil due to the decay of soil structure Reviewed

Noda, T., Nakano, M. and Asaoka, A.

Proc. Int. Workshop on Prediction and Simulation Methods in Geomechanics (IWS-Athens 2003) page： 173-176. 2003.10

Compaction behavior of sand with degradation of structure and overconsolidation Reviewed

Nakano, M., Noda, T., Asaoka A. and Nakai, K.

Proc. of Sino-Japanese Symposium on Geotechnical Engineering, Beijing. page： 455-462 2003.10

Soil-water coupled analysis of upheaval behavior of soil after deep excavation Reviewed

Noda, T., Yamada, E., Asaoka, A. and Kuriyama, K.

Proc. of Sino-Japanese Symposium on Geotechnical Engineering, Beijing. page： 173-180 2003.10

Delayed compression associated with low land subsidence due to dewatering Reviewed

Kaneda, K., Noda, T., Nakano, M., Asaoka A. and Yamada, S.

Proc. of Sino-Japanese Symposium on Geotechnical Engineering, Beijing. page： 25-32 2003.10

Compaction of sandy ground by "static" cavity expansion Reviewed

Noda, T., Yamada, E. and Yamada, S.

Proc. 12th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering page： 501-504 2003.8

土の構造とメカニックス」-ミクロからマクロへ-　6. 土の微視的構造の変化と弾塑性モデル Open Access

浅岡顕、中野正樹、野田利弘

土と基礎，地盤工学会 Vol. 51 ( 2 ) page： 43-48 2003.2

Elasto-plastic description of shear behavior after compaction of loose sand

Nakano, M., Noda, T., Yamada, E., Kaneda, K., Nakai, K. and Asaoka A.

Proc. 1st International Workshop on New Frontiers in Computational Geomechanics (IWS-CALGARY 2002) page： 27-32 2003.1

　 PREV - NEXT 　

<NODA, Toshihiro>

Papers - NODA, Toshihiro