Abstract:
The objective of the research reported in this paper is to measure the damping (D) of Soil-model footing system using resonance testing technique. A technique of applying a constant dynamic excitation force was used to vibrate the system. System damping was measured by the "band-width method" and compared with theoretical prediction from the Hsieh [I] and Lysmer [3] analyses. It is observed that radiation damping is constant for mass ratio (Bz) greater than 30 and varies considerably for mass ratio less than 10. Furthermore, the test results indicated that theory overestimates the radiation damping by about 30% to 50%.