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Full-Text Articles in Engineering
Prediction Of Static Liquefaction Landslides, Abouzar Sadrekarimi
Prediction Of Static Liquefaction Landslides, Abouzar Sadrekarimi
Civil and Environmental Engineering Presentations
Static liquefaction failure of sloping grounds has resulted in significant damages to built structures and even loss of lives. The principal aim of this research is to relate static liquefaction behavior of cohesionless soils to a measurable threshold from the field. Based on a very large number (893) of undrained laboratory shear tests on cohesionless soils collected from the past literature, a threshold triggering excess pore water pressure is introduced in this study above which static liquefaction failure occurs. The effect of variations in the direction and relative magnitudes of principal stresses associated with different modes of shear and ground …
Evaluating The Liquefaction And Reliquefaction Behavior Of A Carbonate Sand, Abouzar Sadrekarimi
Evaluating The Liquefaction And Reliquefaction Behavior Of A Carbonate Sand, Abouzar Sadrekarimi
Civil and Environmental Engineering Presentations
Despite extensive amount of research on liquefaction analysis of sands, reliquefaction behavior and cyclic liquefaction resistance of cohesionless soils under a repeated cyclic load have not received the same amount of consideration. This is important as most soil deposits in high seismic areas have been subjected to repeated number of earthquakes. This paper presents series of laboratory cyclic simple shear tests on specimens of a local carbonate sand from London, Ontario. Sand specimens are reconstituted at relative densities of 25%, 45%, and 65% and subjected to effective vertical stresses of 50, 100, 200, 400, and 600 kPa. Reconstituted samples are …
Characterization Of A Carbonate Sand Based On Shear Wave Velocity Measurement, Abouzar Sadrekarimi, Keyvan Mirbaha
Characterization Of A Carbonate Sand Based On Shear Wave Velocity Measurement, Abouzar Sadrekarimi, Keyvan Mirbaha
Civil and Environmental Engineering Presentations
Numerous studies have been carried out on the dynamic behavior of sands. However, few studies have investigated the dynamic characteristics of carbonate sands. This paper presents series of laboratory simple shear tests on specimens of a local carbonate sand from London (ON). Besides monotonic and cyclic shearing, the dynamic behavior of the sand is also characterized by measuring the velocity of shear waves travelling through the specimens. Drained and undrained shearing behavior of specimens with a wide range of relative density and consolidation stresses are tested. Shear wave velocity is found to vary with effective overburden stresses by an average …