Effect of strain history on the monotonic and cyclic response of natural and reconstituted silts

Dadashiserej, Ali; Jana, Amalesh; Stuedlein, Armin W.; Evans, T. Matthew

doi:10.1016/j.soildyn.2022.107329

Cited by 12 publications

(4 citation statements)

References 52 publications

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“…The cyclic DSS apparatus in this study is outfitted with a pair of bender element (BE) and piezoelectric disc (PD) transducers for body wave measurements (compression wave, Vp; shear wave, Vs). Vp measurement provides an indirect indication of the degree of saturation, Sr, for comparison to in-situ conditions, whereas Vs measurements allow evaluation of specimen quality and monitoring of changes to soil fabric following sampling and shearing (Landon et al 2007, El Sekelly et al 2016, Dadashiserej et al 2022b).…”

Section: Cyclic Direct Simple Shear Apparatusmentioning

confidence: 99%

“…Constant-volume monotonic DSS tests were conducted using the SSH-100 direct simple shear device with retrofitted platens to accommodate sensors for body wave measurements, described in detail by Dadashiserej et al (2022b). Specimens for monotonic tests were consolidated using two approaches: (1) consolidation under vertical effective stress, 'vc, equal to the estimated in-situ vertical effective stress, 'v0, using recompression technique (Bjerrum and Landva 1966), and (2) the SHANSEP technique in which 'p deduced from results of CRS tests was exceeded by a large margin followed by unloading to the desired 'vc (Ladd 1991).…”

Section: Constant-volume Monotonic Direct Simple Shear Testsmentioning

confidence: 99%

“…The observed differences for specimens with similar index and stress history characteristics may stem from different depositional environments, void ratios, particle morphology, aging effects, and implementation of different consolidation methods (i.e., recompression versus quasi-SHANSEP technique; Stuedlein et al 2023) to replicate the existing in-situ stress state conditions (Idriss and Boulanger 2008, Dahl et al 2010, Dadashiserej et al 2022c.…”

Section: Variation Of Cyclic Resistance With Number Of Loading Cyclesmentioning

confidence: 99%

“…The results of the laboratory testing programs represented in the current database (e.g., Sanin and Wijewickreme 2006;Dahl et al 2014Dahl et al , 2018Wijewickreme et al 2019;Jana and Stuedlein 2021;Dadashiserej et al 2022aDadashiserej et al , 2022bDadashiserej et al , 2022cDadashiserej et al , 2022dStuedlein et al 2023 and contributing consultant project files) suggest that the overconsolidation ratio, OCR, mineralogy, plasticity index, PI, fines content, FC, and void ratio, e, are the most important factors contributing to the cyclic resistance of plastic soil deposits. The importance of each of these factors in the variation of exponent b, CRR, and cyc/su,DSS at N =3% , as the commonly-used cyclic shear strain failure criterion, are investigated and are generalized to different magnitudes of cyclic shear strain failure criteria in the following sections.…”

Section: General Factors Contributing To the Cyclic Resistance Of Fin...mentioning

confidence: 99%

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Models for the Cyclic Resistance of Silts and Evaluation of Cyclic Failure during Subduction Zone Earthquakes

Stuedlein¹,

Dadashiserej²,

Jana³

2023

PEER Reports

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This report describes several advances in the cyclic failure assessment of silt soils with immediate and practical benefit to the geotechnical earthquake engineering profession. First, a database of cyclic loading test data is assembled, evaluated, and used to assess trends in the curvature of the CRR-N (cyclic resistance ratio - the number of equivalent cycles) relationship. This effort culminated in a plasticity index-dependent function which can be used to estimate the exponent b in the power law describing cyclic resistance, and may be used to estimate the cyclic resistance of silt soils as well as the number of equivalent loading cycles anticipated for subduction zone earthquakes. Statistical models for the cyclic resistance ratio and cyclic strength ratio are presented in this report. The SHANSEP (Stress History and Normalized Soil Engineering Properties)-inspired functional form of these models have been trained and tested against independent datasets and finalized using a combined dataset to provide reasonable estimates of resistance based on the available data. These models can be used to provide provisional estimates of the CRR-N and cyclic strength ratio power laws for cyclic shear strain failure criteria ranging from 1 to 10%, within certain stated limitations. The ground motion records within the NGA Subduction Project which have been released to the public to-date are implemented to examine the role of subduction zone earthquake characteristics on the number of equivalent loading cycles for a wide range of soils with exponents b ranging from 0.05 (moderate plasticity silt and clay) to 0.35 (dense sand). This analysis shows that the number of loading cycles for a given magnitude subduction zone earthquake is larger than those previously computed, whereas the corresponding magnitude scaling factors for use with the Simplified Method span a smaller range as a result of the ground motion characteristics. Owing to the large variability in the computed equivalent number of loading cycles, consideration of the uncertainty is emphasized in forward analyses. The work described herein may be used to estimate cyclic resistance of intact non-plastic and plastic silt soils and corresponding factor of safety against cyclic failure for a range in cyclic shear strain failure criteria, to plan cyclic laboratory testing programs, and to calibrate models for use in site response and nonlinear deformation analyses in the absence of site-specific cyclic test data. As with any empirical approach, the models presented herein should be revised when additional, high-quality cyclic testing data become available.

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Section: Cyclic Direct Simple Shear Apparatusmentioning

confidence: 99%

Section: Constant-volume Monotonic Direct Simple Shear Testsmentioning

confidence: 99%

Section: Variation Of Cyclic Resistance With Number Of Loading Cyclesmentioning

confidence: 99%

Section: General Factors Contributing To the Cyclic Resistance Of Fin...mentioning

confidence: 99%

See 2 more Smart Citations

Models for the Cyclic Resistance of Silts and Evaluation of Cyclic Failure during Subduction Zone Earthquakes

Stuedlein¹,

Dadashiserej²,

Jana³

2023

PEER Reports

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show abstract

Particle fabric imaging for understanding the monotonic and cyclic shear response of silts

Wijewickreme

Sancho

2023

Soil Dynamics and Earthquake Engineering

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Mechanical characteristics and microstructure of saturated sand under monotonic and cyclic loading conditions

Wang,

Xu,

Liang

et al. 2024

Soil Dynamics and Earthquake Engineering

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Effect of strain history on the monotonic and cyclic response of natural and reconstituted silts

Cited by 12 publications

References 52 publications

Models for the Cyclic Resistance of Silts and Evaluation of Cyclic Failure during Subduction Zone Earthquakes

Models for the Cyclic Resistance of Silts and Evaluation of Cyclic Failure during Subduction Zone Earthquakes

Particle fabric imaging for understanding the monotonic and cyclic shear response of silts

Mechanical characteristics and microstructure of saturated sand under monotonic and cyclic loading conditions

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