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Cyclic and post-cyclic monotonic behavior of Adapazari soils
Abstract The August 17, 1999 Kocaeli earthquake affected the city of Adapazari, which is located in the northwest of Turkey, with severe liquefaction and bearing capacity failures causing tilting of buildings, excessive settlements and lateral displacements. To understand the stress–strain behavior and pore pressure behavior of undisturbed soils during the earthquake, the cyclic and post-cyclic shear strength tests have been conducted on soil samples obtained from Adapazari in a cyclic triaxial test system within the scope of this research. Cyclic tests have been conducted under stress controlled and undrained conditions. Post-cyclic monotonic tests have been conducted following cyclic tests. The strength curves obtained in the experiments showed that the dynamic resistance of silty sand was found to be 45% lower than those of high plasticity soils (MH). The strength of clayey soils with the plasticity index of PI=15–16% was lower compared to the strength of high plasticity soils. Also, it was observed that silty sand soils had the lowest strength. The dynamic strength of the soils increased with the increase in plasticity.
Highlights Cyclic stress–strain and pore pressure behavior of undisturbed soils are examined. The soils exhibiting sand-like, clay-like or intermediate behavior are presented. Pore pressure is affected by the plasticity index, particle size and properties. The critical level of the deformation is determined to be ±0.50 and 1.0%. The static strength of the soils decreases after cyclic loading.
Cyclic and post-cyclic monotonic behavior of Adapazari soils
Abstract The August 17, 1999 Kocaeli earthquake affected the city of Adapazari, which is located in the northwest of Turkey, with severe liquefaction and bearing capacity failures causing tilting of buildings, excessive settlements and lateral displacements. To understand the stress–strain behavior and pore pressure behavior of undisturbed soils during the earthquake, the cyclic and post-cyclic shear strength tests have been conducted on soil samples obtained from Adapazari in a cyclic triaxial test system within the scope of this research. Cyclic tests have been conducted under stress controlled and undrained conditions. Post-cyclic monotonic tests have been conducted following cyclic tests. The strength curves obtained in the experiments showed that the dynamic resistance of silty sand was found to be 45% lower than those of high plasticity soils (MH). The strength of clayey soils with the plasticity index of PI=15–16% was lower compared to the strength of high plasticity soils. Also, it was observed that silty sand soils had the lowest strength. The dynamic strength of the soils increased with the increase in plasticity.
Highlights Cyclic stress–strain and pore pressure behavior of undisturbed soils are examined. The soils exhibiting sand-like, clay-like or intermediate behavior are presented. Pore pressure is affected by the plasticity index, particle size and properties. The critical level of the deformation is determined to be ±0.50 and 1.0%. The static strength of the soils decreases after cyclic loading.
Cyclic and post-cyclic monotonic behavior of Adapazari soils
Kaya, Zulkuf (author) / Erken, Ayfer (author)
Soil Dynamics and Earthquake Engineering ; 77 ; 83-96
2015-05-03
14 pages
Article (Journal)
Electronic Resource
English
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