Prediction of Clay Behaviour in Undrained and Partially Drained Cyclic Triaxial Tests

Hyodo, Masayuki; Yasuhara, Kazuya; Hirao, Kazutoshi

doi:10.3208/sandf1972.32.4_117

Cited by 78 publications

(21 citation statements)

References 9 publications

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“…In order to construct the gravity offshore platform, Andersen et al (1980) conducted comprehensive research on Drammen clay characteristics under wave loading. Considering the element of pore water pressure dissipation, Hyodo et al (1992) studied the pore water pressure and residual settlement of saturated soft clay in the subgrade under traffic loading. A model for predicting the cyclic behavior of soft clay was presented by Zhou and Tu (1996), while the onedimensional sedimentation of clay under long-term cyclic loading was estimated by Jun and Chen (2001) from China.…”

Section: Introductionmentioning

confidence: 99%

Test on cyclic creep behavior of mucky clay in Shanghai under step cyclic loading

Tang

Zhou

et al. 2010

Environ Earth Sci

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Based on the cyclic triaxial test under step loading, the variation of cyclic creep and pore water pressure with increase in cyclic stress ratio (CSR) and load cycle of mucky clay in Shanghai were analyzed. The results show that there are two threshold values of stability cyclic stress ratio and failure cyclic stress ratio during the step loading which divide the development of cyclic creep strain into gradual stability stage, rapid growth stage and instantaneous failure stage. When the stress level is less than the failure cyclic stress ratio, the recoverable elastic strain is nearly linear with CSR. The cyclic creep properties of mucky clay are obviously influenced by the loading frequency under the same stress level.

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Section: Introductionmentioning

confidence: 99%

Test on cyclic creep behavior of mucky clay in Shanghai under step cyclic loading

Tang

Zhou

et al. 2010

Environ Earth Sci

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“…A rise in the excess pore water pressure leads to a decrease in the shear resistance of clay, and this has caused damage to foundations and soil structures (Sasaki et al, 1980;Seed et al, 1987;Mendoza and Auvinet, 1988). Recently, the development of strain amplitude under repeated loading (Hyodo et al, 1992;Nishida et al, 1993), initial static shear stress effects on cyclic shear behavior (Hyodo et al, 1994), and a design method to evaluate the loss of shear strength due to repeated loads (Andersen et al, 1988a, b) have all been investigated.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of an Underlying Alluvial Clay on Man-Made Islands During the 1995 Hyogoken-Nambu Earthquake

Kazama

Yamaguchi

Yanagisawa

1998

SOILS AND FOUNDATIONS

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The authors have studied the seismic behavior of the alluvial clay layer on Kobe Port Island during the 1995Hyogoken-Nambu earthquake.First the shear stress-strain relationship of the clay was estimated from the main shock of seismic array data. Next using the stress wave inferred from array records we conducted a cyclic simple shear test.The samples used in this study were the clay sampled from Port Island and Rokko Island. The clay sampled from the two man-made islands are from the same clay layer, but the clay from Rokko Island was not as consolidated as the clay at Port Island. After consolidation with the confining pressure at the array site, we applied a dynamic shear stress at the same stress rate as the actual earthquake. The shear strain time histories inferred from array records were compared with those from the simple shear test. The strain time history obtained from the simple shear test gave good comparison to that obtained from array records. Finally the settlement due to dynamic shearing was studied through the simple shear test. It was found that the difference of the degree of consolidation affects the seismic behavior of soft clay.

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“…When soft clay layers are subjected to strong cyclic shears by an earthquake, the cyclic shear-induced pore water pressure is accumulated inside the layers and due to its dissipation, the settlement occurs. The estimation method for the cyclic shear-induced settlement of clay layers has been widely developed (Ohara and Matsuda 1988;Matsuda 1997;Matsuda and Nagira 2000;Matsuda et al 2013a, b;Yasuhara and Andersen 1991;Yasuhara et al 1992Yasuhara et al , 2001Yasuhara 1995;Hyodo et al 1992), in which Ohara and Matsuda (1988) derived Eq. (8) where the settlement in strain (e V , %) induced by the undrained uni-directional cyclic shear is a function of the so-called ''cyclic recompression index, C dyn '' and ''stress reduction ratio, SRR''.…”

Section: Development Of a Model For Cyclic Shear-induced Pore Water Pmentioning

confidence: 99%

A model for multi-directional cyclic shear-induced pore water pressure and settlement on clays

Nhàn

Matsuda

Sato

2017

Bull Earthquake Eng

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An estimation method for earthquake-induced pore water pressure and the postearthquake settlement of soft clay was developed by focusing on its Atterberg's limits and the direction of cyclic shearing. To clarify the fundamental characteristics of clays with different Atterberg's limits under multi-directional cyclic shear, normally consolidated specimens of Kaolinite clay, Tokyo bay clay and Kitakyushu clay were subjected to cyclic simple shear under the undrained condition with various cyclic shear directions and shear strain amplitudes, followed by the dissipation of cyclic shear-induced pore water pressure. The effects of undrained cyclic shear on the pore water pressure accumulation and postcyclic settlement were observed, and relationships with Atterberg's limits were then investigated. In conclusion, the pore water pressure accumulation and post-cyclic settlement induced by multi-directional cyclic shear increase considerably to a higher level compared with those generated by the uni-directional one and such a tendency is evident for clays with a wide range of Atterberg's limits. Comparisons of the results indicate that the soil with higher plasticity index shows the lower pore water pressure accumulation and post-cyclic settlement, irrespective of number of strain cycles and shear strain amplitude. Based on these results, a model for earthquake-induced pore water pressure and postearthquake settlement was developed by incorporating the Atterberg's limits as a function of experimental constants and the practical applicability was confirmed.

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Prediction of Clay Behaviour in Undrained and Partially Drained Cyclic Triaxial Tests

Cited by 78 publications

References 9 publications

Test on cyclic creep behavior of mucky clay in Shanghai under step cyclic loading

Test on cyclic creep behavior of mucky clay in Shanghai under step cyclic loading

Seismic Behavior of an Underlying Alluvial Clay on Man-Made Islands During the 1995 Hyogoken-Nambu Earthquake

A model for multi-directional cyclic shear-induced pore water pressure and settlement on clays

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