Location
San Diego, California
Presentation Date
26 May 2010, 4:45 pm - 6:45 pm
Abstract
This paper presents the test results of single (L/d = 15) and 2 x 2 group piles (L/d = 15 and s/d = 2, 3, 4) subjected to strong vertical and coupled vibration. The observed response curves display marked nonlinearity as the natural frequencies decreases with increasing intensity of excitation. The measured response is compared with the results obtained by using the continuum approach of Novak with dynamic interaction factor. To account for the nonlinear response of the piles, provisions are made for yielding of soil around the piles by introducing the weak boundary zone effect concept in the model. Different separation lengths between the pile and top soil are considered for different excitation intensities in the nonlinear analysis. Comparison with the test results show that the accuracy of the nonlinear analysis in predicting the dynamic response depends on the choice of parameters that best characterize the response of boundary zone around the pile and the realistic length of pile separation. The test data are used to establish the empirical relationships between the extent of soil separation around the pile and the maximum amplitudes for both vertical and coupled vibration. It is also found that the pile-soil-pile interaction and the embedded effect of the pile cap play a major role in the dynamic response of pile foundation.
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
Manna, Bappaditya and Baidya, Dilip Kumar, "Nonlinear Soil-Pile Interaction Under Vertical and Coupled Motion" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 35.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session05/35
Included in
Nonlinear Soil-Pile Interaction Under Vertical and Coupled Motion
San Diego, California
This paper presents the test results of single (L/d = 15) and 2 x 2 group piles (L/d = 15 and s/d = 2, 3, 4) subjected to strong vertical and coupled vibration. The observed response curves display marked nonlinearity as the natural frequencies decreases with increasing intensity of excitation. The measured response is compared with the results obtained by using the continuum approach of Novak with dynamic interaction factor. To account for the nonlinear response of the piles, provisions are made for yielding of soil around the piles by introducing the weak boundary zone effect concept in the model. Different separation lengths between the pile and top soil are considered for different excitation intensities in the nonlinear analysis. Comparison with the test results show that the accuracy of the nonlinear analysis in predicting the dynamic response depends on the choice of parameters that best characterize the response of boundary zone around the pile and the realistic length of pile separation. The test data are used to establish the empirical relationships between the extent of soil separation around the pile and the maximum amplitudes for both vertical and coupled vibration. It is also found that the pile-soil-pile interaction and the embedded effect of the pile cap play a major role in the dynamic response of pile foundation.
