Use of Bender Elements in Soil Dynamics Experiments

by Pedro de Alba, Univ of New Hampshire, Durham, United States,
Kenneth C. Baldwin, Univ of New Hampshire, Durham, United States,

Abstract: Transducers employing piezoelectric bender elements have been found to be versatile sources and receivers of small-amplitude shear waves, with multiple potential applications. The constitutive parts and operation of a basic bender-element shear wave velocity measurement system incorporated in a triaxial loading apparatus are described. This system permits low-strain shear wave velocity measurements to be made on the same samples which will then be subjected to large-strain tests. Typical results correlating acoustic parameters to fabric differences and liquefaction resistance of sands are presented, and other potential applications are discussed.

Subject Headings: Shear waves | Wave measurement | Wave velocity | Triaxial tests | Triaxial loads | Equipment and machinery | Shear tests

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