Nonlinear stress-strain response of soft Chicago glacial clays

Kim, Tae-Sik; Han, Jin Tae; Cho, Wanjei

doi:10.1007/s12205-014-0041-1

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…The simple operation of these piezoceramic transducers, together with their small size, has stimulated their use in a big variety of geotechnical equipment since their first appearance [46]. BEs have been incorporated into a wide range of laboratory device (i.e., triaxial [47], true triaxial, hollow cylinder, simple shear, shear box, oedometer, resonant column), as well as into boundaries of laboratory model test apparatuses. Originally, BEs were applied to determine G max , but with the passage of time and their greater usage, they have been employed to measure P-wave velocity (V P ), to investigate fabric and structure, additionally in particular cementation and its degradation, degree of saturation or anisotropy, to assess sample's quality and control multi-stage testing [48].…”

Section: Methodsmentioning

confidence: 99%

Application of Bender Elements Technique in Testing of Anthropogenic Soil—Recycled Concrete Aggregate and Its Mixture with Rubber Chips

et al. 2017

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Featured Application: Recycled Concrete Aggregate can be a very good alternative material for natural aggregate. Using soil-rubber mixture as an engineering material may not only provide alternative means of reusing waste but also significantly change dynamic properties of soil.Abstract: This paper discusses the application of piezoceramic bender elements (BEs) for measurement of shear wave velocity in the time and frequency domain in a triaxial cell under different isotropic confinement. Different interpretation methods were used in the tests and their results were finally compared with each other. Two types of anthropogenic material were tested: pure Recycled Concrete Aggregate (RCA) and RCA-rubber chips mixtures (15% of rubber addition). Presented study is an attempt to describe dynamic properties, in terms of shear wave velocity (V S ), of the aforementioned anthropogenic material using the technique commonly applied for natural soil. Although some research is currently being carried out, in order to evaluate physical, chemical and mechanical properties of RCA and rubber-soil mixtures, still little is known of their dynamic properties. Hence, this work will provide the experimental results of shear wave velocity of RCA and its modified version. The results show that tires chips significantly decrease the V S values of modified RCA. They help to reduce the near field effect, but the received parameters are more incoherent. The V S values were found to be influenced by interpretation technique, mean effective stress and wave's propagation period. The maximum V S values were obtained mostly from the frequency domain method, although time domain analysis gives the results that are more coherent.

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Section: Methodsmentioning

confidence: 99%

Application of Bender Elements Technique in Testing of Anthropogenic Soil—Recycled Concrete Aggregate and Its Mixture with Rubber Chips

et al. 2017

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“…The BEs were 11-mm-wide, 1-mm-thick and extended about 1 mm into the soil specimens. Detailed specifi cations of the employed triaxial apparatus, internal instrumentation and bender element equipment are provided by [17][18][19][20].…”

Section: Laboratory Equipment Soil Samples and Testing Proceduresmentioning

confidence: 99%

“…It corresponds to a time resolution of 0.0033 ms. With this time resolution, the propagation velocity can be resolved to approximately ±0.7 m/s, which corresponds to approximately ±0.7 MPa in the determination of maximum shear moduli for the average dimensions and properties of the tested specimens. As explained by [17,32], the signals contain noise and the waveforms peaks can shift back and forth for different BE shots conducted at the same sample conditions, implying that the propagation velocity and maximum shear modulus determination are vulnerable to noise and resulting errors can be greater than ±0.7 m/s and ±0.7 MPa, respectively.…”

Section: Peak-to-peak Approachmentioning

confidence: 99%

Analysis of Bender Element signals during triaxial testing

Kim

Zapata-Medina

Vega-Posada

2015

Rev. Fac. Ing. Antioquia

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This paper presents and discusses three different wave propagation methods used to evaluate the shear wave velocities, V s , computed from Bender Element (BE) analyses during triaxial testing. The peak-to-peak travel time, cross-correlation and phase-delay approaches were employed to calculate V s and to determine the error in wave propagation velocities when time domain and frequency domain methods are implemented. The results obtained from vertical BE tests conducted on clay specimens indicates that, when the proper BE testing conditions are met, the differences in V s calculated using the three methods were within ±2%. This error is small and indicates that the peak-to-peak method, the simplest and fastest time domain approach, can be employed as a straight forward method to determine shear wave velocities. RESUMEN:Este artículo presenta y discute tres métodos para evaluar la velocidad de la onda cortante, V s , con base en el análisis de señales de "Bender Elements" (BE) tomadas durante ensayos triaxiales. Los métodos de tiempo de viaje de pico-a-pico (peak-to-peak travel time), correlación cruzada (cross-correlation) y fase retrasada (phase-delay) fueron empleados para calcular V s , y determinar el error en la velocidad de propagación de la onda cuando se realizan los análisis en el dominio del tiempo y en el dominio de la frecuencia. Los resultados obtenidos de los ensayos Bender Element indican que cuando las condiciones apropiadas se cumplen, las diferencias entre los valores calculados de V s usando los tres métodos varían entre ±2%. Este error es pequeño y está entre los rangos aceptables indicando que el método de tiempo de viaje pico-a-pico, el cual es el método más sencillo y rápido de aplicar, puede ser empleado como un método directo para calcular la velocidad de la onda cortante.

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An Efficient Generalized Plasticity Constitutive Model with Minimal Complexity and Required Parameters

Heidarzadeh

Oliaei

2018

KSCE J Civ Eng

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Nonlinear stress-strain response of soft Chicago glacial clays

Cited by 4 publications

References 25 publications

Application of Bender Elements Technique in Testing of Anthropogenic Soil—Recycled Concrete Aggregate and Its Mixture with Rubber Chips

Application of Bender Elements Technique in Testing of Anthropogenic Soil—Recycled Concrete Aggregate and Its Mixture with Rubber Chips

Analysis of Bender Element signals during triaxial testing

An Efficient Generalized Plasticity Constitutive Model with Minimal Complexity and Required Parameters

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