Location
San Diego, California
Presentation Date
26 May 2010, 11:30 am - 12:00 pm
Abstract
Seismically induced settlement of buildings with shallow foundations on liquefiable soils has resulted in significant damage in recent earthquakes. In Adapazari, Turkey multi-story buildings punched into, tilted excessively, and slid laterally on softened ground. The state-of-the-practice still largely involves estimating building settlement using empirical procedures developed to calculate postliquefaction consolidation settlement in the free-field. This approach cannot possibly capture shear-induced and localized volumetricinduced deformations in the soil underneath shallow mat foundations. Geotechnical centrifuge experiments were performed recently to identify the dominant mechanisms involved in liquefaction-induced building settlement. The centrifuge tests revealed that considerable building settlement occurs during earthquake strong shaking. Volumetric strains due to localized drainage in response to high transient hydraulic gradients and deviatoric strains due to shaking-induced ratcheting of the buildings into the softened soil are important effects that are currently not captured in current procedures. The relative importance of each mechanism depends on the characteristics of the earthquake motion, liquefiable soil, and building. The initiation, rate, and amount of liquefaction-induced building settlement depend greatly on the shaking intensity rate (SIR) of the ground motion. Preliminary recommendations for estimating liquefaction-induced movements of buildings with shallow foundations are made. However, additional work is warranted.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, 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
Bray, Jonathan D. and Dashti, Shideh, "Liquefaction-Induced Movements of Buildings with Shallow Foundations" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 4.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session12/4
Included in
Liquefaction-Induced Movements of Buildings with Shallow Foundations
San Diego, California
Seismically induced settlement of buildings with shallow foundations on liquefiable soils has resulted in significant damage in recent earthquakes. In Adapazari, Turkey multi-story buildings punched into, tilted excessively, and slid laterally on softened ground. The state-of-the-practice still largely involves estimating building settlement using empirical procedures developed to calculate postliquefaction consolidation settlement in the free-field. This approach cannot possibly capture shear-induced and localized volumetricinduced deformations in the soil underneath shallow mat foundations. Geotechnical centrifuge experiments were performed recently to identify the dominant mechanisms involved in liquefaction-induced building settlement. The centrifuge tests revealed that considerable building settlement occurs during earthquake strong shaking. Volumetric strains due to localized drainage in response to high transient hydraulic gradients and deviatoric strains due to shaking-induced ratcheting of the buildings into the softened soil are important effects that are currently not captured in current procedures. The relative importance of each mechanism depends on the characteristics of the earthquake motion, liquefiable soil, and building. The initiation, rate, and amount of liquefaction-induced building settlement depend greatly on the shaking intensity rate (SIR) of the ground motion. Preliminary recommendations for estimating liquefaction-induced movements of buildings with shallow foundations are made. However, additional work is warranted.
