Simple models for predicting cyclic behaviour of sand in quaternary alluvium

Das, Angshuman; Chakrabortty, Pradipta

doi:10.1007/s12517-022-09639-6

Cited by 7 publications

(2 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the effects from the ground to the engineering structure in the area affected by the earthquake and the displacements that may occur at the ground surface can be predicted more accurately 21 , 22 . In the following years, with the development of various programs, the formation and damping behavior of the excess pore water pressure that occurs in the soil during liquefaction has been evaluated, and various software and body models have been developed by many researchers 23 , 24 . It has been concluded that the constitutive equations of UBC3D-PLM, PDMY02 and PM4Sand, which have emerged in recent years and are used in the modeling of liquefaction behavior, provide results closer to reality 25 , 26 .…”

Section: Introductionmentioning

confidence: 99%

The effect of RCA pavements on the liquefaction-induced settlement

Akbaş¹,

Subasi²,

İyisan³

2023

Sci Rep

View full text Add to dashboard Cite

The use of recycled concrete aggregates (RCA) not only reduces the demand for natural aggregates (NA) but also might improve the behavior of soil under earthquake loading. In this study, the behavior of the pavement constructed using 100% RCA and NA on a sandy soil layer with high liquefaction potential under dynamic loads was investigated by numerical analysis and compared with free field conditions. For this purpose, first, the classical geotechnical properties of 100% RCA and NA materials were obtained, and then the stiffness properties were determined by resilient modulus and permanent deformation tests. In the second stage, three different models were created with pavement with NA and RCA and without pavement on high liquefaction potential sand, and dynamic analyses were carried out by PM4Sand. Numerical analyses show that constructing a subbase and base layers significantly reduces liquefaction-induced settlement on the surface of flexible pavements built on liquefied soils. Moreover, when the case of using RCA instead of NA in the subbase and base layers built on the liquefied soil is examined, the liquefaction-induced settlement values on the surface are obtained either lower or very close. Consequently, this study proposes a new alternative to the use of RCA waste materials instead of NA. It is expected the use of these waste materials will reduce the need for storage space and also reduce the negative environmental effects associated with storage.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of RCA pavements on the liquefaction-induced settlement

Akbaş¹,

Subasi²,

İyisan³

2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The results pointed out the 30 to 50% increase in loading cycles for soils treated with biochar in comparison with clean Ganga sand. Das and Chakrabortty (2022) presented a study to model the large strain cyclic behavior of cohesionless soil from MGP using regression, statistical and neural network methods. The authors find neural network to be more precise in predicting cyclic behavior of soil.…”

Section: Introductionmentioning

confidence: 99%

Liquefaction Behavior of Typical River Channel Deposit in Kolkata City

Prasad,

Mondal,

Roy

et al. 2023

International Journal of Geotechnical Earthquake Engineering

View full text Add to dashboard Cite

Liquefaction susceptibility of river channel deposit in Kolkata city is studied using laboratory cyclic triaxial tests. River channel deposit, which supports a large part of rapidly growing urbanization of Kolkata city, mainly consists of sandy soil with little amount of silt. Cyclic triaxial tests have been performed on this soil sample with varying relative density, confining pressure, and cyclic strain amplitude. Results are presented to show how these parameters influence the pore water pressure generation within soil. Relative density, confining pressure and cyclic strain amplitude are found to affect the pore pressure generation characteristics in the soil, and the number of cycles required to reach liquefaction phenomena vary significantly. Finally, pore pressure generation characteristics are modeled using a hyperbolic model and a pore pressure generation equation is proposed for the typical river channel deposit soil. The model exhibits a certain threshold value of cyclic strain amplitude, up to which the initial rate of pore pressure generation decreases and then increases.

show abstract