Assessment of shear modulus by different seismic wave-based techniques

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

Santos, J (Author) Other; Santos, J (Author) Other; Cristiana Ferreira (Author) FEUP; Pereira, C (Author) Other; Gomes Correia, A (Author) Other

Conference proceedings International

Title: DEFORMATION CHARACTERISTICS OF GEOMATERIALS

Pages: 374-381

6th International Symposium on Deformation Characteristics of Geomaterials

Buenos Aires, ARGENTINA, NOV 15-18, 2015

Indexing

ISI Web of Knowledge - 2 Citations

Other information

Authenticus ID: P-00K-GEY

DOI: 10.3233/978-1-61499-601-9-374

Abstract (EN): Using combined setup of bender elements and accelerometers, tests were conducted on Coimbra sand specimens in order to measure and interpret seismic wave velocities to assess initial shear modulus. For these tests both time and frequency domain analyses were performed. Resonant column tests were also performed on the same sand to validate the results obtained with the bender elements and accelerometers setup. As is well known, in the last decades the development of new laboratory techniques to assess soil stiffness through the use of seismic wave-based techniques, has received significant attention due to its simplicity and versatility of the equipment setup. One of these techniques is the bender elements test which have been one of the most widely used, although some limitations concerning its usage. In this context, the combined use of bender elements with other seismic wave-based testing techniques, such as accelerometers or the resonant column, is quite important to compare and validate the testing techniques. Given its miniature size, the installation of accelerometers on the side of the sample is considered feasible without significant disturbance on the other measuring techniques. The resonant column is a widely used and accurate testing technique due to its reliability and repeatability. Finally, the results of this combined tests allow a critical discussion on the advantages and limitations of the use of bender elements and accelerometers, in contrast with the resonant-column for the assessment of the shear modulus in sand.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8