Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

Liquefaction is one of the major causes of damage to civil engineering structures. The shear strength of sandy soil during strong earthquakes is reduced due to exerted energy that is related to increasing of pore water pressure. The absorbed energy calculated through hysteretic stress-strain loops as compared with the exerted earthquake energy is an alternative method to study the liquefaction susceptibility of saturated sandy soil. There are several numbers of remediation methods which reduce the excess pore water pressure such as gravel drains. In the current study seven precisely performed 1-g shaking table tests are conducted. Synthetic Firouzkooh sand was used as the reference soil. The effectiveness of the gravel drains in the model against liquefaction is investigated by energy method. Energy per unit volume absorbed by the soil for every test was calculated. Three gravel drain arrangements and two input motion levels are checked in this study. The results show that absorbed energy concept is an appropriate approach in this kind of complicated problems to study the gravel drains effectiveness. The consumed energy in the different soil elements has a good conformity with the generated pore pressure.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Evaluation of Gravel Drains Effectiveness Against Liquefaction in Shaking Table Utilizing Energy Method

San Diego, California

Liquefaction is one of the major causes of damage to civil engineering structures. The shear strength of sandy soil during strong earthquakes is reduced due to exerted energy that is related to increasing of pore water pressure. The absorbed energy calculated through hysteretic stress-strain loops as compared with the exerted earthquake energy is an alternative method to study the liquefaction susceptibility of saturated sandy soil. There are several numbers of remediation methods which reduce the excess pore water pressure such as gravel drains. In the current study seven precisely performed 1-g shaking table tests are conducted. Synthetic Firouzkooh sand was used as the reference soil. The effectiveness of the gravel drains in the model against liquefaction is investigated by energy method. Energy per unit volume absorbed by the soil for every test was calculated. Three gravel drain arrangements and two input motion levels are checked in this study. The results show that absorbed energy concept is an appropriate approach in this kind of complicated problems to study the gravel drains effectiveness. The consumed energy in the different soil elements has a good conformity with the generated pore pressure.