Dynamic properties and liquefaction behaviour of cohesive soil in northeast India under staged cyclic loading

Kumar, Shiv Shankar; Krishna, A. Murali; Dey, Arindam

doi:10.1016/j.jrmge.2018.04.004

Cited by 38 publications

(9 citation statements)

References 31 publications

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“…It was noticed from the past studies that the damping ratio gets diminished beyond 0.5% cyclic shear strain [50], which is in good agreement with the current study. A similar trend was noticed from the past studies on sandy soils, cohesive soils by many researchers [27,[54][55][56][57]. The variation of G dyn and its gradual loss with cyclic strain for different relative compaction, frequency and effective confining pressure can be illustrated in Figs.…”

Section: Effect Of Varying Parameters On Dynamic Characteristics Of Pond Ashsupporting

confidence: 85%

“…Jakka et al [22] performed extensive studies on cyclic resistance of pond ash considering different sample location from ash ponds. Few researchers [23][24][25][26][27][28] performed studies on dynamic characterization and liquefaction evaluation of sand/coal ash using cyclic triaxial tests. Many researchers have performed several numerical studies on seismic performance of layered soil/pond ash deposits with shallow foundation [29][30][31], seismic performance of embankments with pond ash [32,33] and seismic ground response analysis of pond ash [34].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Dynamic Characterization of Equi-Proportionate Silt–Sand Range Pond Ash at High Strain

Reddy

Mohanty

Rehana

2020

Int. J. of Geosynth. and Ground Eng.

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In the present study, it was attempted to investigate the cyclic resistance of equi-proportionate silt-sand range pond ash (with 50% fines) at relatively high shear strains using the strain-controlled cyclic triaxial test. The cyclic triaxial tests have been performed considering the effect of relative compaction (97-99%), cyclic shear strain (0.6-1.35%), frequency of loading (0.3-1 Hz) and effective confining pressure (50-100 kPa) on cyclic resistance of pond ash. Dynamic characteristics such as dynamic shear modulus and damping ratio of equi-proportionate silt-sand range pond ash was evaluated for all the parameters considered at high shear strain. The maximum value of the dynamic shear modulus and damping ratio of pond ash observed in this study was 6534.8 kPa and 23.64%, respectively. The dynamic shear modulus and damping ratio of pond ash was decreased from 6534.8 to 5023.87 kPa and 23.64 to 14.17% with the increase in shear strain amplitude from 0.6 to 1.35%. Besides, few relationships were established between the amount of energy dissipated until liquefaction and parameters influencing liquefaction using an energy concept. Keywords Pond ash • Cyclic resistance • High shear strain • Strain-controlled cyclic triaxial test • Dynamic shear modulus • Damping ratio This the 13th PAPER of Special Issue (SI) to be published as the ORIGINAL PAPER S.I.: Materials and Processes for Ground Engineering Infrastructure.

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Section: Effect Of Varying Parameters On Dynamic Characteristics Of Pond Ashsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Dynamic Characterization of Equi-Proportionate Silt–Sand Range Pond Ash at High Strain

Reddy

Mohanty

Rehana

2020

Int. J. of Geosynth. and Ground Eng.

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“…Next, the ground characteristics of various stratum are attained from the soil boreholes log report. Subsequently, 5% damping consideration is implemented to every ground class, and dynamic characteristics for all the ground stratum [29]. Afterwards, the shear wave velocity or Vs of the ground strata are enumerated from the detailed SPT-N values utilizing the equation by [26].…”

Section: -D Equivalent Linear Methods In Deepsoil V6 Softwarementioning

confidence: 99%

Evaluation on the Soil Flexibility of the Largest HEP Dam Area in East Malaysia using 1-D Equivalent Linear Analysis

Ahmadi¹,

Suhaili²,

Najar³

et al. 2021

International Journal on Advanced Science, Engineering and Information Technology

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This paper presents the evaluation of soil flexibility at the vicinity of the Bakun HEP Dam, the largest in East Malaysia. The dam is located in the Belaga District of Sarawak, approximately 50 km from the active Tubau and Bukit Mersing fault lines. This area experienced earthquakes of magnitudes ranging between 3.5 and 5.4 during the period from 1994 and 2010. This study used global and local earthquake records to evaluate the site-specific seismic hazard using a 1-D equivalent linear analysis. SPT data from 15 boreholes are utilized. Soil flexibility, factor of safety, liquefaction probability and potential index are evaluated to find the ground settlement and soil liquefaction effects. The results show that the ground amplification of Belaga District is between 2.445 and 5.146, while the peak ground accelerations (PGA) at ground surface are at a maximum average of 0.25g PGA. The soil factors for Bakun District range from 2.6 -3.0, for 2% POE in 50 years. This corresponds to a 2475-year return period. The response spectra are found matching with the target design response spectra for Sarawak as reported in the Malaysia National Annex (MS EN 1998-1:2015). The effects of soil liquefaction are found to be insignificant, as a result the nearby Bakun HEP dam is considered safe from any ground settlement. This study highlights the importance of evaluating the ability of new or existing structures in Belaga District to withstand up to 0.25g PGA in case any seismic event should occur in the future.

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“…In comparison to stress controlling, a few researchers believe that strain controlling is more intuitive, since liquefaction is a displacement-dependent phenomenon. It is clarified that shear strain is the key parameter that allows control over the ground settlements and the development of pore water pressure during the cyclic loading (Dobry et al, 1982;Talaganov, 1992;Vucetic, 1992;Matsuda et al, 2011;Kang et al, 2015;Kumar et al, 2018;Dammala et al, 2019). More importantly, unlike the stress controlling method, cyclic tests controlled by shear strain do not reach uncontrolled strain condition.…”

Section: Introductionmentioning

confidence: 99%

Liquefaction and post-liquefaction of granular material under multi-directional cyclic loading

Zhang

Yang

2020

Marine Georesources & Geotechnology

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Dynamic properties and liquefaction behaviour of cohesive soil in northeast India under staged cyclic loading

Cited by 38 publications

References 31 publications

Experimental Investigation on Dynamic Characterization of Equi-Proportionate Silt–Sand Range Pond Ash at High Strain

Experimental Investigation on Dynamic Characterization of Equi-Proportionate Silt–Sand Range Pond Ash at High Strain

Evaluation on the Soil Flexibility of the Largest HEP Dam Area in East Malaysia using 1-D Equivalent Linear Analysis

Liquefaction and post-liquefaction of granular material under multi-directional cyclic loading

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