Differences between static and dynamic measurements of the elastic moduli in a typical seismogenic rock

Informations Contextuelles

Static and dynamic elastic moduli of Calcare Massiccio mudstone–limestone, the typical seismogenic rock in the Italian Apennines, are measured using a standard uniaxial ‘static’ compression test, a Dual Cantilever forced oscillation test and ultrasonic measurement of elastic wave velocities. These measurements cover nine decades in frequency including the seismic domain. Neither a significant frequency dependence nor a pronounced strain amplitude dependence was observed, providing a Young’s modulus of (75 ± 7) GPa and a Poisson’s ratio of (0.28 ± 0.02). These values are characteristic of Calcare Massiccio in undamaged condition.