Cyclic behavior of saturated low plastic fine soils

Download

index.pdf

Date

2011

Author

Sağlam, Selman

Metadata

Show full item record

Item Usage Stats

225
views

418
downloads

Weakening and liquefaction of sands with increasing excess pore water pressures under repeated loads is well-known. Occurrence of extensive damage to the built environment also at the sites underlain by fine soils during earthquakes have led the researchers to focus on the seismic response of such soils more recently. The primary objective of this study is to investigate the factors affecting cyclic behavior of saturated low-plastic fine soils through laboratory testing. An extensive laboratory testing program including conventional soil mechanics tests, consolidation tests, reconstituted sample preparation, monotonic and cyclic triaxial tests was carried out for this purpose. Laboratory program was conducted within two parts, one of which includes the tests performed with the silt specimens reconstituted in the laboratory and the other consisting of the tests performed with the undisturbed soil samples retrieved from Adapazarı. The effects of the inherent soil properties and the effects of loading characteristics on the cyclic response of saturated low plastic silty soils were examined separately. Based on the test results, models were introduced (i) to predict the relationship between excess pore pressure ratio (ru), number of cycles (N) and cyclic stress ratio (CSRtx), (ii) to estimate the effect of initial shear stress on cyclic response, and (iii) to show the effects of initial void ratio (ei), initial shear stress ratio (s/p'i) and CSRtx on cyclic pore pressure development.

Subject Keywords

Soil liquefaction., Soil mechanics., Artificial intelligence

URI

http://etd.lib.metu.edu.tr/upload/12613772/index.pdf
https://hdl.handle.net/11511/21233

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Cyclic response of saturated silts Saglam, Selman; Bakır, Bahadır Sadık (Elsevier BV, 2014-06-01) Softening and strength loss of sands with increasing excess pore water pressure under repeated loads is well-known. However, extensive damage to the built environment also occurs at the sites underlain by fine grained soils during seismic shaking. The primary objective of this study is to investigate the factors affecting cyclic behavior of saturated low-plastic silt through laboratory testing. For this purpose, an extensive laboratory testing program including conventional monotonic and cyclic triaxial tes...
Excess porewater pressures during secondary compression Mesri, Gholamreza; Huvaj Sarıhan, Nejan; Barames, Vardhanabhuti; Ho, YH (2005-09-12) A gradient in an excess porewater pressure conveys water out of soil during secondary compression. This excess porewater pressure is produced by the tendency of soil to continue compression as a result of the disequilibrium produced during primary compression. Because the measurement of excess porewater pressure is frequently specified for establishing the progress of primary consolidation, it is useful to know the order of magnitude of excess porewater pressure associated with secondary compression. Mathem...
Characterizing interwell connectivity in waterflooded reservoirs using data-driven and reduced-physics models: a comparative study Artun, Emre (Springer Science and Business Media LLC, 2017-07-01) Waterflooding is a significantly important process in the life of an oil field to sweep previously unrecovered oil between injection and production wells and maintain reservoir pressure at levels above the bubble-point pressure to prevent gas evolution from the oil phase. This is a critical reservoir management practice for optimum recovery from oil reservoirs. Optimizing water injection volumes and optimizing well locations are both critical reservoir engineering problems to address since water injection c...
Nonlinearity of the residual shear strength envelope in stiff clays Maghsoudloo, Arash; Huvaj Sarıhan, Nejan; Department of Civil Engineering (2013) During shearing of stiff clays, plate-shaped clay particles are parallel-oriented in the direction of shear reaching the minimum resistance of “residual shear strength”. The residual shear strength envelopes of stiff clays are curved, but for practical purposes represented by linear envelopes. This study investigates the nonlinearity of the residual shear strength envelope using experimental evidence (i) from laboratory reversal direct shear tests on two stiff clays (Ankara clay and kaolinite) at 25 to 900 ...
Lateral versus vertical swell pressures in expansive soils Sapaz, Burak; Erol, Orhan; Department of Civil Engineering (2004) Expansive or swelling soils, exist in many part of the world, show excessive volume changes with increasing water content. As a result of this volume increase, expansive soils apply vertical and lateral pressures to the structures located or buried in these regions. Many researchs have been carried out on vertical swelling pressures helping to the engineers to design structures withstanding on these stresses. However, lateral swell behaviour of swelling soils have not been fully understood yet. Structures s...

Citation Formats

S. Sağlam, “Cyclic behavior of saturated low plastic fine soils,” Ph.D. - Doctoral Program, Middle East Technical University, 2011.