Prediction of excess pore water pressure and post-cyclic settlement on soft clay induced by uni-directional and multi-directional cyclic shears as a function of strain path parameters

Matsuda, Hiroshi; Nhàn, Trần Thanh; Ishikura, Ryohei

doi:10.1016/j.soildyn.2013.01.010

Cited by 36 publications

(21 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…21b and therefore the validity of the developed model for estimating the earthquake-induced pore water pressure accumulation is confirmed for a wide range of c max . In addition to the accumulation component of U dyn /r 0 v0 which is focused in the current developed model, the changes of U dyn /r 0 v0 during undrained cyclic shear is also affected by the so-called ruffling component (Matsuda et al 2013b) and this is considered to be one of reasons for the differences between the estimated and observed results in Fig. 21a.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 97%

“…To clarify the effect of cyclic shear strain direction on the earthquake-induced pore water pressure accumulation and the settlement of clayey soil, cyclic shear tests were performed under the undrained condition and followed by the drainage, in which the maximum shear strain amplitudes in NS and EW directions were changed, covering from lower to higher levels based on the original ones. The method of irregular multi-directional cyclic shear tests has been shown more in detail by Matsuda et al (2013b). The changes of pore water pressure during undrained cyclic shear and the vertical settlement after cyclic shear are shown in Fig.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

“…c maxNS [ c maxEW and so c maxNS is referred as the maximum shear strain amplitude of the earthquake, i.e. c max = c maxNS (Matsuda et al 2013b). In Fig.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

“…The equivalent number of cycles should be calculated directly from the acceleration records by using the peak-counting definitions (Malhotra 2002;Hancock and Bommer 2005), meanwhile the equivalent uniform shear strain amplitude has been confirmed as a function of the maximum shear strain amplitude, such as c dyn = 0.65 c max Annaki and Lee 1977) or c dyn = F(c max ) G where F and G are the experimental parameters (Matsuda and Hoshiyama 1992). The transformation procedure by using these methods has been developed and applied to Hyogo-ken Nanbu earthquake 1995 by Matsuda et al (2013b) and the obtained results of N cy and c dyn are shown in Table 7 for various maximum shear strain amplitudes.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

“…22a, b, the change of void ratio (De) and the post-earthquake settlement (e v , %) are plotted against SRR and c dyn . The Table 7 Equivalent number of cycles and shear strain amplitude (Matsuda et al 2013b) Maximum shear strain amplitude, c max (%) a Observed data of c max = 0.38% was added to the previous data on the same Kaolin calculated results shown by dashed and solid lines were obtained by using c dyn = 0.65 c max and c dyn = F(c max ) G , respectively. The calculated results agree reasonably with the observed ones and therefore, the validity of the developed model for predicting postearthquake settlement can be confirmed.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

See 4 more Smart Citations

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

Nhàn

Matsuda

Sato

2017

Bull Earthquake Eng

Self Cite

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

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 97%

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

“…c maxNS [ c maxEW and so c maxNS is referred as the maximum shear strain amplitude of the earthquake, i.e. c max = c maxNS (Matsuda et al 2013b). In Fig.…”

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

Section: Estimation Of Post-cyclic Settlement Concerning the Effect Omentioning

confidence: 99%

See 3 more Smart Citations

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

Nhàn

Matsuda

Sato

2017

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

show abstract

Seismic performance of two classes of earth dams

Masini

Rampello

Donatelli³

2020

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

In the last decades, Italy has experienced several strong earthquakes, triggering the attention on the high seismic risk associated with the potential instability of large existing earth dams. Under intense seismic events, dam response depends on various factors including the geometry and the type of water retention scheme. This paper explores the influence of these factors, comparing the seismic performance of two idealized earth dams: a homogeneous dam and a zoned dam. The simplified models adopted in the analyses are representative of these two classes of earth dams, often adopted in the sixties to design various dams located in southern Italy. The idealized models, here examined in detail, have comparable heights and foundation soil conditions, differing in terms of water retention scheme. The seismic response of the dams was evaluated through time-domain nonlinear dynamic analyses in which the same input ground motion, represented by real-time histories, was applied at the base of the models. It is shown that for highly inelastic systems, such as those at hand, duration of input motion should be accounted for in addition to compatibility criteria with a design elastic response spectrum. Also, different slopes of dam flanks, shear strength mobilization at the end of dam construction and high stiffness contrast at the shells-core contacts are shown to result in different deformation patterns at the end of earthquake loading. Some peculiarities in the behavior of these classes of earth dams are highlighted in the paper, providing a guidance for the rational assessment of their seismic performance.

show abstract

Macro- and micro-mechanical investigations on liquefaction behaviour of granular material under bi-directional simple shear

et al. 2021

View full text Add to dashboard Cite

Prediction of excess pore water pressure and post-cyclic settlement on soft clay induced by uni-directional and multi-directional cyclic shears as a function of strain path parameters

Cited by 36 publications

References 21 publications

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

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

Seismic performance of two classes of earth dams

Macro- and micro-mechanical investigations on liquefaction behaviour of granular material under bi-directional simple shear

Contact Info

Product

Resources

About