Presentation Title

Effect of Earthquakes on the Shear Strength of Clayey Soils

Start Date

November 2016

End Date

November 2016

Location

HUB 265

Type of Presentation

Oral Talk

Abstract

Due to the magnitude of the damage that an earthquake can cause, it is important to understand how these natural disasters affect soil strength. Under earthquake conditions, clay loses some of its strength. This can have devastating effects on infrastructure, as a loss of soil strength can lead to the collapse of buildings, landslides and other disasters. Different clays will react differently to these conditions with some types of clays losing more strength than others. This study focused on the effects of different cyclic stress ratios (CSR) and varying normal stresses on the strength of kaolinite, using Cyclic Simple Shear tests. The results showed that an increase in the number of cycles of loading caused a decrease in the cyclic resistance of the soil sample. Furthermore, samples with a lower normal stress were less resistant to the cyclic loading, but the cyclic resistance was not substantial different at higher number of cycles of loading. As the normal stress decreased, the reduction in the shear strength as a result of the earthquake was larger.

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Nov 12th, 2:45 PM Nov 12th, 3:00 PM

Effect of Earthquakes on the Shear Strength of Clayey Soils

HUB 265

Due to the magnitude of the damage that an earthquake can cause, it is important to understand how these natural disasters affect soil strength. Under earthquake conditions, clay loses some of its strength. This can have devastating effects on infrastructure, as a loss of soil strength can lead to the collapse of buildings, landslides and other disasters. Different clays will react differently to these conditions with some types of clays losing more strength than others. This study focused on the effects of different cyclic stress ratios (CSR) and varying normal stresses on the strength of kaolinite, using Cyclic Simple Shear tests. The results showed that an increase in the number of cycles of loading caused a decrease in the cyclic resistance of the soil sample. Furthermore, samples with a lower normal stress were less resistant to the cyclic loading, but the cyclic resistance was not substantial different at higher number of cycles of loading. As the normal stress decreased, the reduction in the shear strength as a result of the earthquake was larger.