Location
San Diego, California
Presentation Date
30 Mar 2001, 1:30 pm - 3:30 pm
Abstract
In this paper, the results of an experimental investigation on the response of model shallow footings to horizontal accelerations are presented. The experiments were conducted on square and rectangular footings resting on or embedded in a dry sand and shaken in a shake box. The shake box was designed to subject the soil to simple shear conditions during shaking. Model footings, constructed from lead, were used to study the seismic bearing capacity. The influence of the magnitude and frequency of the horizontal accelerations, the static bearing capacity safety factor, the footing shape, the depth of embedment, and the relative density of the soil on the seismic bearing capacity were investigated. It is shown that the initial shear fluidization acceleration is the maximum acceleration sustainable by a shallow footing regardless of the static bearing capacity safety factor. Critical accelerations from limit equilibrium analyses do not compare favorably with the experimental results except when the change in angle of friction from cyclic densification was taken into account.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2001 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Al-Karni, Awad A. and Budhu, Muniram, "An Experimental Study of Seismic Bearing Capacity of Shallow Footings" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 1.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session09/1
Included in
An Experimental Study of Seismic Bearing Capacity of Shallow Footings
San Diego, California
In this paper, the results of an experimental investigation on the response of model shallow footings to horizontal accelerations are presented. The experiments were conducted on square and rectangular footings resting on or embedded in a dry sand and shaken in a shake box. The shake box was designed to subject the soil to simple shear conditions during shaking. Model footings, constructed from lead, were used to study the seismic bearing capacity. The influence of the magnitude and frequency of the horizontal accelerations, the static bearing capacity safety factor, the footing shape, the depth of embedment, and the relative density of the soil on the seismic bearing capacity were investigated. It is shown that the initial shear fluidization acceleration is the maximum acceleration sustainable by a shallow footing regardless of the static bearing capacity safety factor. Critical accelerations from limit equilibrium analyses do not compare favorably with the experimental results except when the change in angle of friction from cyclic densification was taken into account.
