Development of a novel test setup for assessing vertical and horizontal small strain stiffness using disk transducers in a large rectangular specimen

Troyee Dutta, Masahide Otsubo, Manushak Durgalian, Reiko Kuwano, Takeshi Sato

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The precise estimation of small strain stiffness often quantified using elastic wave velocities is essential to accurately analyse and design geotechnical structures. Due to the simplicity of use, piezoelectric transducers are adopted ubiquitously for the assessment of small strain stiffness by performing wave measurements. In this regard, bender and extender elements have gained
immense popularity to measure the shear wave (Vs) and compression wave velocities (Vp), respectively. However, there are few shortcomings involved in the bender element technique; due to their invasive nature, bender elements are not suitable for wave velocity assessment of coarse-grained particles, undisturbed and cemented specimens. Hence, previous researchers started embracing
planar shaped piezoelectric transducers, also referred to as disk transducers (DT) (1,2), to obtain elastic wave velocities. However, there is a lack of research undertaken on the development and use of DT to estimate horizontal wave velocities in soils. In the present study, the development of an innovative test assembly which enables the estimation of nine types of small strain stiffnesses to discuss the stiffness anisotropy of geomaterials is presented.
Original languageEnglish
Title of host publicationProceedings of the 54th Japan National Conference on Geotechnical Engineering
PublisherThe Japanese Geotechnical Society
Number of pages2
Publication statusPublished - 2019
Externally publishedYes
EventJapan National Conference on Geotechnical Engineering 2019 - Saitama, Japan
Duration: 16 Jul 201918 Jul 2019
Conference number: 54th

Conference

ConferenceJapan National Conference on Geotechnical Engineering 2019
CountryJapan
CitySaitama
Period16/07/1918/07/19

Cite this