Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

To investigate the behavior of liquefaction-induced lateral spreading of ground and mechanism of its influencing failure of structures, a shaking table test of a large-scale model with liquefiable sand deposit was performed at the E-Defense shaking table testing facility. The model in a rigid container 16 meters long, 4 meters wide and 5 meters high had a pile-foundation structure behind caisson-type quay wall in the deposit. About 900 sensors and other instrumentations were installed with the model, acquiring accelerations, strains, pore water pressures, and even large displacements occurred by extensive behavior. To the model, two-dimensional, horizontal and vertical motions based on the records obtained in the 1995 Hyogoken-Nambu earthquake were applied, generating liquefaction of the deposit and following lateral spreading. The motions also made the caisson overturn to the waterside, resulting in large deformation of its backfill. Such behaviors caused three waterside piles to bend at the same level of the caisson’s mound. The testing result explained the influences of inertial force and ground deformation on the overturn of the caisson and the collapse of the structure. This observation is valuable regarding understanding of this phenomenon because there has been no such data resulting from observation during earthquakes until now.

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

Share

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

E-Defense Shaking Table Test on the Behavior of Liquefaction-Induced Lateral Spreading of Large-Scale Model Ground with a Pile-Foundation Structure Behind Quay Wall

San Diego, California

To investigate the behavior of liquefaction-induced lateral spreading of ground and mechanism of its influencing failure of structures, a shaking table test of a large-scale model with liquefiable sand deposit was performed at the E-Defense shaking table testing facility. The model in a rigid container 16 meters long, 4 meters wide and 5 meters high had a pile-foundation structure behind caisson-type quay wall in the deposit. About 900 sensors and other instrumentations were installed with the model, acquiring accelerations, strains, pore water pressures, and even large displacements occurred by extensive behavior. To the model, two-dimensional, horizontal and vertical motions based on the records obtained in the 1995 Hyogoken-Nambu earthquake were applied, generating liquefaction of the deposit and following lateral spreading. The motions also made the caisson overturn to the waterside, resulting in large deformation of its backfill. Such behaviors caused three waterside piles to bend at the same level of the caisson’s mound. The testing result explained the influences of inertial force and ground deformation on the overturn of the caisson and the collapse of the structure. This observation is valuable regarding understanding of this phenomenon because there has been no such data resulting from observation during earthquakes until now.