Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites
The use of polypropylene fibers as a geosynthetic in infrastructures is a promising ground treatment method with applications in the enhancement of the bearing capacity of foundations, slope rehabilitation, strengthening of backfills, as well as the improvement of the seismic behavior of geo-systems...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/15/2476 |
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| author | Haiwen Li Sathwik S. Kasyap Kostas Senetakis |
| author_facet | Haiwen Li Sathwik S. Kasyap Kostas Senetakis |
| author_sort | Haiwen Li |
| collection | DOAJ |
| description | The use of polypropylene fibers as a geosynthetic in infrastructures is a promising ground treatment method with applications in the enhancement of the bearing capacity of foundations, slope rehabilitation, strengthening of backfills, as well as the improvement of the seismic behavior of geo-systems. Despite the large number of studies published in the literature investigating the properties of fiber-reinforced soils, less attention has been given in the evaluation of the dynamic properties of these composites, especially in examining damping characteristics and the influence of fiber inclusion and content. In the present study, the effect of polypropylene fiber inclusion on the small-strain damping ratio of sands with different gradations and various particle shapes was investigated through resonant column (macroscopic) experiments. The macroscopic test results suggested that the damping ratio of the mixtures tended to increase with increasing fiber content. Accordingly, a new expression was proposed which considers the influence of fiber content in the estimation of the small-strain damping of polypropylene fiber-sand mixtures and it can be complementary of damping modeling from small-to-medium strains based on previously developed expressions in the regime of medium strains. Additional insights were attempted to be obtained on the energy dissipation and contribution of fibers of these composite materials by performing grain-scale tests which further supported the macroscopic experimental test results. It was also attempted to interpret, based on the grain-scale tests results, the influence of fiber inclusion in a wide spectrum of properties for fiber-reinforced sands providing some general inferences on the contribution of polypropylene fibers on the constitutive behavior of granular materials. |
| first_indexed | 2024-03-10T09:10:14Z |
| format | Article |
| id | doaj.art-86720a981c5f4594bff1ed50afdfa610 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T09:10:14Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-86720a981c5f4594bff1ed50afdfa6102023-11-22T06:03:30ZengMDPI AGPolymers2073-43602021-07-011315247610.3390/polym13152476Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand CompositesHaiwen Li0Sathwik S. Kasyap1Kostas Senetakis2Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsDepartment of Architecture and Civil Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, ChinaDepartment of Architecture and Civil Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, ChinaThe use of polypropylene fibers as a geosynthetic in infrastructures is a promising ground treatment method with applications in the enhancement of the bearing capacity of foundations, slope rehabilitation, strengthening of backfills, as well as the improvement of the seismic behavior of geo-systems. Despite the large number of studies published in the literature investigating the properties of fiber-reinforced soils, less attention has been given in the evaluation of the dynamic properties of these composites, especially in examining damping characteristics and the influence of fiber inclusion and content. In the present study, the effect of polypropylene fiber inclusion on the small-strain damping ratio of sands with different gradations and various particle shapes was investigated through resonant column (macroscopic) experiments. The macroscopic test results suggested that the damping ratio of the mixtures tended to increase with increasing fiber content. Accordingly, a new expression was proposed which considers the influence of fiber content in the estimation of the small-strain damping of polypropylene fiber-sand mixtures and it can be complementary of damping modeling from small-to-medium strains based on previously developed expressions in the regime of medium strains. Additional insights were attempted to be obtained on the energy dissipation and contribution of fibers of these composite materials by performing grain-scale tests which further supported the macroscopic experimental test results. It was also attempted to interpret, based on the grain-scale tests results, the influence of fiber inclusion in a wide spectrum of properties for fiber-reinforced sands providing some general inferences on the contribution of polypropylene fibers on the constitutive behavior of granular materials.https://www.mdpi.com/2073-4360/13/15/2476ground treatmentgeosyntheticsfibersdampingenergy dissipationresonant column testing |
| spellingShingle | Haiwen Li Sathwik S. Kasyap Kostas Senetakis Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites Polymers ground treatment geosynthetics fibers damping energy dissipation resonant column testing |
| title | Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites |
| title_full | Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites |
| title_fullStr | Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites |
| title_full_unstemmed | Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites |
| title_short | Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites |
| title_sort | multi scale study of the small strain damping ratio of fiber sand composites |
| topic | ground treatment geosynthetics fibers damping energy dissipation resonant column testing |
| url | https://www.mdpi.com/2073-4360/13/15/2476 |
| work_keys_str_mv | AT haiwenli multiscalestudyofthesmallstraindampingratiooffibersandcomposites AT sathwikskasyap multiscalestudyofthesmallstraindampingratiooffibersandcomposites AT kostassenetakis multiscalestudyofthesmallstraindampingratiooffibersandcomposites |