Effects of Cyclic Loading on Undrained Strength and Compressibility of Clay

Yasuhara, Kazuya; Hirao, Kazutoshi; Hyde, A. F. L.

doi:10.3208/sandf1972.32.100

Cited by 116 publications

(48 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interesting approach to the issue was presented in the work of Yashuara et al [28], where it was stated that in the case of normally consolidated soils subjected to cyclic loading in undrained conditions pore water pressure is generated, which causes a decrease in effective stress. Stress path is moving towards the critical state line CSL.…”

Section: Behaviour Of Cohesive Soil Subjected To Cyclic Loadingmentioning

confidence: 99%

“…Slightly different observations are contained in the publications of Matsui et al [16] and also Procter and Khaffaf [18], where no visible effects of frequency on soil behaviour under cyclic loading has been observed. Yasuhara et al [28] state that there is no apparent effect of frequency on shear strength of soil subjected to cyclic loading in undrained conditions.…”

Section: Behaviour Of Cohesive Soil Subjected To Cyclic Loadingmentioning

confidence: 99%

See 1 more Smart Citation

Behaviour of Cohesive Soil Subjected to Low-Frequency Cyclic Loading in Strain-Controlled Tests

Kalinowska

Jastrzębska

2015

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

Abstract:The subject of the paper comprises tests of cohesive soil subjected to low-frequency cyclic loading with constant strain amplitude. The main aim of the research is to define a failure criteria for cohesive soils subjected to this type of load. Tests of undrained cyclic shear were carried out in a triaxial apparatus on normally consolidated reworked soil samples made of kaolinite clay from Tułowice. Analysis of the results includes the influence of number of load cycles on the course of effective stress paths, development of excess pore water pressure and stress deviator value. Observed regularities may seem surprising. The effective stress path initially moves away from the boundary surface and only after a certain number of load-unload cycles change of its direction occurs and it starts to move consequently towards the surface. At the same time, it has been observed that pore water pressure value decreases at the beginning and after few hundred cycles increases again. It is a typical behaviour for overconsolidated soil, while test samples are normally consolidated. Additionally, a similar change in deviator stress value has been observed -at first it decreases and later, with subsequent cycles, re-increases.

show abstract

Section: Behaviour Of Cohesive Soil Subjected To Cyclic Loadingmentioning

confidence: 99%

Section: Behaviour Of Cohesive Soil Subjected To Cyclic Loadingmentioning

confidence: 99%

Behaviour of Cohesive Soil Subjected to Low-Frequency Cyclic Loading in Strain-Controlled Tests

Kalinowska

Jastrzębska

2015

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

show abstract

“…For saturated sands, the problems regarding the cyclic shear-induced pore water pressure and settlement, and the effect of cyclic shear direction on their dynamic properties have been extensively studied by a number of researches (Pyke et al 1975;Ishihara and Yamazaki 1980;Tokimatsu and Yoshimi 1982;Ishihara and Yoshimine 1992;Talaganov 1996;Matsuda et al 2004Matsuda et al , 2011 and taken into account for a long time (Japan Road Association 2002). When comparing the earthquake resistance of saturated clay with sand, soft cohesive soils are believed to be relatively stable because no liquefaction takes place even under strong motion by earthquakes (Hyodo et al 1994(Hyodo et al , 1999Yasuhara et al 1992Yasuhara et al , 2001) and consequently, studies on the earthquake-induced pore water pressure and post-earthquake settlement of clay and sand are in different situations (Matasovic and Vucetic 1992;Yildirim and Ersan 2007), due to which the influence of the cyclic shear direction on the dynamic properties of clays has just been firstly mentioned by DeGroot et al (1996) and observed for Kaolinite clay by Matsuda et al (2013a, b). In addition, since the effects of relative movements of soil particle on the complex pore water pressure response are still insufficiently clarified, the so-called curve-fitting method is an appropriate approach for effective modelling of the pore water pressure accumulation and several models have been proposed for the case of strain-controlled cyclic shear e.g.…”

Section: Introductionmentioning

confidence: 99%

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

Nhàn

Matsuda

Sato

2017

Bull Earthquake Eng

View full text Add to dashboard Cite

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.

show abstract

“…Later, Yasuhara et al (2001) proposed a design methodology for the assessment of post-cyclic volumetric settlements (i.e. strains) based on the early findings of Yasuhara's research teams (Yasuhara and Andersen 1991;Yasuhara et al 1992;Yasuhara and Hyde 1997). As an input requirement of the methodology, the estimation of excess pore pressure is required, and authors recommended 2-D or 3-D dynamic numerical analysis for the determination of excess pore water pressure distribution within the soil media.…”

Section: Seismic Deformation Response Of Silt and Claymentioning

confidence: 99%

“…This limits the practical value of both r u and also ε v,pc models significantly. Yasuhara et al (1992) has performed an experimental study and stated that the ratio of C dyn to C s was approximately equal to 1.5. Unfortunately, pore pressure generation response and corollary issues were not addressed by the researchers.…”

Section: Seismic Deformation Response Of Silt and Claymentioning

confidence: 99%

Recent Advances in Seismic Soil Liquefaction Engineering

Çetin

Bilge²

2014

Perspectives on European Earthquake Engineering and Seismology

View full text Add to dashboard Cite

The assessment of cyclic response of soils has been a major concern of geotechnical earthquake engineering since the very early days of the profession. The pioneering efforts were mostly focused on developing an understanding of the response of clean sands. These efforts were mostly confined to the assessment of the mechanisms of excess pore pressure buildup and corollary reduction in shear strength and stiffness, widely referred to as seismic soil liquefaction triggering. However, as the years passed, and earthquakes and laboratory testing programs continued to provide lessons and data, researchers and practitioners became increasingly aware of additional aspects, such as liquefaction susceptibility and cyclic degradation response of silt and clay mixtures. Inspired from the fact that these issues are still considered as the "soft" spots of the practice, the scope of this chapter is tailored to include a review of earlier efforts along with the introduction of new frameworks for the assessment of cyclic strength and straining performance of coarse-and fine-grained soils.

show abstract

Effects of Cyclic Loading on Undrained Strength and Compressibility of Clay

Cited by 116 publications

References 7 publications

Behaviour of Cohesive Soil Subjected to Low-Frequency Cyclic Loading in Strain-Controlled Tests

Behaviour of Cohesive Soil Subjected to Low-Frequency Cyclic Loading in Strain-Controlled Tests

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

Recent Advances in Seismic Soil Liquefaction Engineering

Contact Info

Product

Resources

About