Published

2019-01-01

Effects of granular shape on shear modulus and damping ratio of gravel

Efectos de la forma granular sobre el módulo de corte y la relación de amortiguamiento de la grava

DOI:

https://doi.org/10.15446/esrj.v23n1.78727

Keywords:

Gravel, Granule shape, Shear modulus, Damping ratio (en)
Grava, Forma de gránulo, Módulo de corte, Relación de amortiguación (es)

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Authors

  • Kai Cui Department Key Laboratory of High-speed Railway Engineering of the Ministry of Education, Southwest Jiaotong University
  • Hang Sheng School of Civil Engineering, Southwest Jiaotong University, Chengdu

The effects of the consolidation ratio, effective confining pressure, gravel content, and granule breakage on the shear modulus and damping ratio of gravel have been extensively researched in recent years. However, studies on the effect of the granular shape are rare. Thus, under different confining pressures, dynamic triaxial tests were performed on gravel specimens to investigate the effect of granular shape on the shear modulus and damping ratio of gravel specimens by using a multifunctional triaxial testing instrument. The samples consisted of two kinds of gravel with the same grain composition and relative density of 45%. The test results indicate that, when the confining pressure and shear strain amplitude exceed 300 kPa and 7×10-4, respectively, gravel with a round granular shape has a higher shear modulus compared to an angular shape. Conversely, when the shear strain amplitude exceeds 2×10-4, the damping ratio of angular gravel exceeds that of round granules.

Los efectos de la relación de consolidación, la presión de confinamiento efectiva, el contenido de grava y la rotura de gránulos en el módulo de corte y la relación de amortiguación de la grava se han investigado ampliamente en los últimos años. Sin embargo, los estudios sobre el efecto de la forma granular son escasos. Por lo tanto, bajo diferentes presiones de confinamiento, se realizaron pruebas triaxiales dinámicas en muestras de grava para investigar el efecto de la forma granular en el módulo de corte y la relación de amortiguamiento de las muestras de grava utilizando un instrumento de prueba triaxial multifuncional. Las muestras consistieron en dos tipos de grava con la misma composición de grano y una densidad relativa del 45%. Los resultados de la prueba indican que, cuando la presión de confinamiento y la amplitud de tensión de corte superan los 300 kPa y 7×10-4, respectivamente, la grava con una forma granular redonda tiene un módulo de corte más alto en comparación con una forma angular. A la inversa, cuando la amplitud de la tensión de cizallamiento excede de 2×10-4, la relación de amortiguamiento de la grava angular excede la de los gránulos redondos.

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How to Cite

APA

Cui, K. and Sheng, H. (2019). Effects of granular shape on shear modulus and damping ratio of gravel. Earth Sciences Research Journal, 23(1), 87–91. https://doi.org/10.15446/esrj.v23n1.78727

ACM

[1]
Cui, K. and Sheng, H. 2019. Effects of granular shape on shear modulus and damping ratio of gravel. Earth Sciences Research Journal. 23, 1 (Jan. 2019), 87–91. DOI:https://doi.org/10.15446/esrj.v23n1.78727.

ACS

(1)
Cui, K.; Sheng, H. Effects of granular shape on shear modulus and damping ratio of gravel. Earth sci. res. j. 2019, 23, 87-91.

ABNT

CUI, K.; SHENG, H. Effects of granular shape on shear modulus and damping ratio of gravel. Earth Sciences Research Journal, [S. l.], v. 23, n. 1, p. 87–91, 2019. DOI: 10.15446/esrj.v23n1.78727. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/78727. Acesso em: 29 mar. 2024.

Chicago

Cui, Kai, and Hang Sheng. 2019. “Effects of granular shape on shear modulus and damping ratio of gravel”. Earth Sciences Research Journal 23 (1):87-91. https://doi.org/10.15446/esrj.v23n1.78727.

Harvard

Cui, K. and Sheng, H. (2019) “Effects of granular shape on shear modulus and damping ratio of gravel”, Earth Sciences Research Journal, 23(1), pp. 87–91. doi: 10.15446/esrj.v23n1.78727.

IEEE

[1]
K. Cui and H. Sheng, “Effects of granular shape on shear modulus and damping ratio of gravel”, Earth sci. res. j., vol. 23, no. 1, pp. 87–91, Jan. 2019.

MLA

Cui, K., and H. Sheng. “Effects of granular shape on shear modulus and damping ratio of gravel”. Earth Sciences Research Journal, vol. 23, no. 1, Jan. 2019, pp. 87-91, doi:10.15446/esrj.v23n1.78727.

Turabian

Cui, Kai, and Hang Sheng. “Effects of granular shape on shear modulus and damping ratio of gravel”. Earth Sciences Research Journal 23, no. 1 (January 1, 2019): 87–91. Accessed March 29, 2024. https://revistas.unal.edu.co/index.php/esrj/article/view/78727.

Vancouver

1.
Cui K, Sheng H. Effects of granular shape on shear modulus and damping ratio of gravel. Earth sci. res. j. [Internet]. 2019 Jan. 1 [cited 2024 Mar. 29];23(1):87-91. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/78727

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