Location
San Diego, California
Presentation Date
29 Mar 2001, 4:00 pm - 6:00 pm
Abstract
For most ground response analyses, the shear modulus is an important parameter to be determined and it has to be measured over a large strain range, so as to characterise the soil behavior under various loading conditions. Laboratory measurement of shear modulus covers a limited strain range depending on the test method. The main difficulty lies in the determination of the shear modulus at very small strains. In this respect, geophysical methods are more attractive. One of these test methods, which uses a continuous surface wave, is used to obtain the shear modulus profile at two sites in Singapore. The Continuous Surface Wave System (CSWS) is a nonintrusive field geophysical test consisting of a vibrator source and several receiver geophones connected to a computer system. The computer collects and analyses the field data, and provides a shear modulus profile at the test site. Conclusions from the field tests support published literature that such field seismic tests are capable of measuring the low-strain shear modulus well. The interpretation of field test data in the absence of specific stratigraphic information can pose some difficulties. An important part in interpreting continuous surface wave measurement data is in the selection of a suitable inversion tool so as to derive the correct shear modulus profile for the site under consideration. A finite element approach (using LS DYNA) is investigated for inversion of field test data. Data obtained from S-wave cross-hole survey are also compared with field tests data obtained using CSWS.
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
Anand, S.; Leong, E. C.; and Cheong, H. K., "Measurement of Shear Modulus Profile Using a Continuous Surface Wave Measurement System" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 35.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session01/35
Included in
Measurement of Shear Modulus Profile Using a Continuous Surface Wave Measurement System
San Diego, California
For most ground response analyses, the shear modulus is an important parameter to be determined and it has to be measured over a large strain range, so as to characterise the soil behavior under various loading conditions. Laboratory measurement of shear modulus covers a limited strain range depending on the test method. The main difficulty lies in the determination of the shear modulus at very small strains. In this respect, geophysical methods are more attractive. One of these test methods, which uses a continuous surface wave, is used to obtain the shear modulus profile at two sites in Singapore. The Continuous Surface Wave System (CSWS) is a nonintrusive field geophysical test consisting of a vibrator source and several receiver geophones connected to a computer system. The computer collects and analyses the field data, and provides a shear modulus profile at the test site. Conclusions from the field tests support published literature that such field seismic tests are capable of measuring the low-strain shear modulus well. The interpretation of field test data in the absence of specific stratigraphic information can pose some difficulties. An important part in interpreting continuous surface wave measurement data is in the selection of a suitable inversion tool so as to derive the correct shear modulus profile for the site under consideration. A finite element approach (using LS DYNA) is investigated for inversion of field test data. Data obtained from S-wave cross-hole survey are also compared with field tests data obtained using CSWS.
