Location
San Diego, California
Presentation Date
27 May 2010, 7:30 pm - 9:00 pm
Abstract
A series of simple impact tests is performed, both on clay and on peat, in order to compare the current wave theory with the obtained data. The waves at the surface are measured with three 3D geophones. With this the wave propagation and the energy dissipation in three directions has been studied both for clay and peat. Since the impact produces a group of waves, only the first arrival time can easily be detected. By transferring the wave information into a 3D energy flow, also the average arrival time and the end-of-wave arrival time can be determined. The results of all tests are very similar, the short wave group splits up in three phases: the first phase consists of compression waves, in the second phase the Rayleigh waves dominate and in the last phase, remarkably, a kind of diagonal Love waves dominate. The second phase starts with a sudden flip of the particle motion due to the arrival of the second wave. In clay 78% of the energy is found in the second phase, while in peat 72% of the energy is found in the third phase.
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
Van Baars, Stefan, "Near Field Wave Transformation in Clay and Peat" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 11.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session02/11
Included in
Near Field Wave Transformation in Clay and Peat
San Diego, California
A series of simple impact tests is performed, both on clay and on peat, in order to compare the current wave theory with the obtained data. The waves at the surface are measured with three 3D geophones. With this the wave propagation and the energy dissipation in three directions has been studied both for clay and peat. Since the impact produces a group of waves, only the first arrival time can easily be detected. By transferring the wave information into a 3D energy flow, also the average arrival time and the end-of-wave arrival time can be determined. The results of all tests are very similar, the short wave group splits up in three phases: the first phase consists of compression waves, in the second phase the Rayleigh waves dominate and in the last phase, remarkably, a kind of diagonal Love waves dominate. The second phase starts with a sudden flip of the particle motion due to the arrival of the second wave. In clay 78% of the energy is found in the second phase, while in peat 72% of the energy is found in the third phase.
