Location
St. Louis, Missouri
Presentation Date
13 Mar 1991, 1:30 pm - 3:30 pm
Abstract
A model for predicting the amplitude versus frequency response for surface footings under vibrations is presented. The model considers the effects of soil nonlinearity and confining pressures on soil modulus and has been verified by comparing model predictions with performance field tests. The elastic half space analog solutions have been used to develop a computer program for this prediction model (Manyando, 1990). Soil nonlinearity has been accounted for by incorporating an iterative procedure in the computer program. The computer program was used to predict the footing response in vertical, torsional and coupled rocking and sliding vibrations. Predicted resonant amplitudes, resonant frequencies and the total sweeps have been compared with the measured values. It has been found that predictions by this model closely match the measured data. Vertical and coupled rocking and sliding vibrations predictions closely match measured data when material damping is neglected. Predictions for torsional vibrations are observed to be satisfactory when 10 percent material damping is used and the slip at the base of the footing is neglected.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1991 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
Manyando, George M. S. and Prakash, Shamsher, "On Predictions and Performance of Machine Foundations" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 15.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session11/15
Included in
On Predictions and Performance of Machine Foundations
St. Louis, Missouri
A model for predicting the amplitude versus frequency response for surface footings under vibrations is presented. The model considers the effects of soil nonlinearity and confining pressures on soil modulus and has been verified by comparing model predictions with performance field tests. The elastic half space analog solutions have been used to develop a computer program for this prediction model (Manyando, 1990). Soil nonlinearity has been accounted for by incorporating an iterative procedure in the computer program. The computer program was used to predict the footing response in vertical, torsional and coupled rocking and sliding vibrations. Predicted resonant amplitudes, resonant frequencies and the total sweeps have been compared with the measured values. It has been found that predictions by this model closely match the measured data. Vertical and coupled rocking and sliding vibrations predictions closely match measured data when material damping is neglected. Predictions for torsional vibrations are observed to be satisfactory when 10 percent material damping is used and the slip at the base of the footing is neglected.
