A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Role of geofoam inclusions on the liquefaction resilience of transportation geostructures
https://orcid.org/0000-0002-0165-2890
Highlights The novel application of geofoam inclusions for mitigating liquefaction is explored from a series of constant volume cyclic simple shear tests. Fundamental aspects of liquefaction, including the progression of pore pressures, accumulation of shear strains, dissipation of strain energy, and modulus degradation, are investigated. The effects of geofoam density and thickness of the inclusion on the liquefaction response are established. Geofoam inclusions proved to increase the liquefaction resistance by several folds, the benefit being maximum with the usage of a low-density and thick geofoam layer. The compressibility and energy absorption characteristics of the geofoam are found to be the key influencers that govern the improved liquefaction resistance.
Abstract Though the effectiveness of geofoam buffers for improving the dynamic load response and seismic performance of road embankments and retaining walls is well-established, their role on soil liquefaction is not investigated by many. This study explores the potential of Expanded Polystyrene (EPS) geofoam inclusions for liquefaction mitigation in sands through a series of stress-controlled constant volume cyclic simple shear tests. The study quantifies the increase in liquefaction resistance of sand with geofoam inclusions and reduction in modulus degradation and shear deformations and increase in energy dissipation with loading cycles. Effects of geofoam density and thickness of the layer on the liquefaction response were also investigated through systematic series of experiments with geofoam of three different densities and two different thicknesses. Findings from this experimental study suggest that providing a thick low-density geofoam layer provided the maximum benefit among all the inclusions. Fundamental mechanisms governing this improved response are explored through a series of bender element tests. Results from this study confirm the effectiveness of geofoam buffers in mitigating liquefaction in granular soils and recommend their use in road embankments and retaining walls being constructed in zones of high seismicity to avoid liquefaction and associated lateral spreading failures in these structures.
Role of geofoam inclusions on the liquefaction resilience of transportation geostructures
https://orcid.org/0000-0002-0165-2890
Highlights The novel application of geofoam inclusions for mitigating liquefaction is explored from a series of constant volume cyclic simple shear tests. Fundamental aspects of liquefaction, including the progression of pore pressures, accumulation of shear strains, dissipation of strain energy, and modulus degradation, are investigated. The effects of geofoam density and thickness of the inclusion on the liquefaction response are established. Geofoam inclusions proved to increase the liquefaction resistance by several folds, the benefit being maximum with the usage of a low-density and thick geofoam layer. The compressibility and energy absorption characteristics of the geofoam are found to be the key influencers that govern the improved liquefaction resistance.
Abstract Though the effectiveness of geofoam buffers for improving the dynamic load response and seismic performance of road embankments and retaining walls is well-established, their role on soil liquefaction is not investigated by many. This study explores the potential of Expanded Polystyrene (EPS) geofoam inclusions for liquefaction mitigation in sands through a series of stress-controlled constant volume cyclic simple shear tests. The study quantifies the increase in liquefaction resistance of sand with geofoam inclusions and reduction in modulus degradation and shear deformations and increase in energy dissipation with loading cycles. Effects of geofoam density and thickness of the layer on the liquefaction response were also investigated through systematic series of experiments with geofoam of three different densities and two different thicknesses. Findings from this experimental study suggest that providing a thick low-density geofoam layer provided the maximum benefit among all the inclusions. Fundamental mechanisms governing this improved response are explored through a series of bender element tests. Results from this study confirm the effectiveness of geofoam buffers in mitigating liquefaction in granular soils and recommend their use in road embankments and retaining walls being constructed in zones of high seismicity to avoid liquefaction and associated lateral spreading failures in these structures.
Role of geofoam inclusions on the liquefaction resilience of transportation geostructures
https://orcid.org/0000-0002-0165-2890
Highlights The novel application of geofoam inclusions for mitigating liquefaction is explored from a series of constant volume cyclic simple shear tests. Fundamental aspects of liquefaction, including the progression of pore pressures, accumulation of shear strains, dissipation of strain energy, and modulus degradation, are investigated. The effects of geofoam density and thickness of the inclusion on the liquefaction response are established. Geofoam inclusions proved to increase the liquefaction resistance by several folds, the benefit being maximum with the usage of a low-density and thick geofoam layer. The compressibility and energy absorption characteristics of the geofoam are found to be the key influencers that govern the improved liquefaction resistance.
Abstract Though the effectiveness of geofoam buffers for improving the dynamic load response and seismic performance of road embankments and retaining walls is well-established, their role on soil liquefaction is not investigated by many. This study explores the potential of Expanded Polystyrene (EPS) geofoam inclusions for liquefaction mitigation in sands through a series of stress-controlled constant volume cyclic simple shear tests. The study quantifies the increase in liquefaction resistance of sand with geofoam inclusions and reduction in modulus degradation and shear deformations and increase in energy dissipation with loading cycles. Effects of geofoam density and thickness of the layer on the liquefaction response were also investigated through systematic series of experiments with geofoam of three different densities and two different thicknesses. Findings from this experimental study suggest that providing a thick low-density geofoam layer provided the maximum benefit among all the inclusions. Fundamental mechanisms governing this improved response are explored through a series of bender element tests. Results from this study confirm the effectiveness of geofoam buffers in mitigating liquefaction in granular soils and recommend their use in road embankments and retaining walls being constructed in zones of high seismicity to avoid liquefaction and associated lateral spreading failures in these structures.
Role of geofoam inclusions on the liquefaction resilience of transportation geostructures
Lakkimsetti, Balaji (author) / Madhavi Latha, Gali (author)
2023-05-31
Article (Journal)
Electronic Resource
English
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