Resonant Column: Colorado School of Mines

Dr. Wang’s research team is interested in modeling the dynamic behaviour of soil-structure infrastructure systems where the contributions of both the manmade and natural earth construction materials must be considered. To do this, it is necessary to develop, calibrate, and validate numerical modeling procedures for incorporating the unique inertial, elastic, and dissipative properties of all of the component materials. Of these dynamic mechanical properties, the dissipative properties of soils are perhaps the most difficult to quantify and numerically represent. There is no generally accepted consensus for modeling multiple intrinsic damping properties in one infrastructure system, nor have proposed techniques been the focus of rigorous experimental validation.

The Solution

It is therefore essential to the calibration and validation process that CSM obtain accurate measurements of the straindependent intrinsic damping properties of their soils such that, they have confidence in their proposed numerical modeling techniques. CSM are using the resonant column apparatus to obtain macroscopic, element level measurements of the intrinsic damping characteristics of multiple standardized sands. The data are being generated in the form of viscous damping ratio, ICON, versus shear strain, ICON, curves at varying effective stress levels. To read the rest of the case study, download the PDF file below.

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