Accession Number : AD0450669


Title :   DYNAMIC PRESSURE DISTRIBUTION AT THE BASE OF A RIGID FOOTING SUBJECTED TO VIBRATORY LOADS,


Descriptive Note : Technical rept.


Corporate Author : MICHIGAN UNIV ANN ARBOR COLL OF ENGINEERING


Personal Author(s) : Chae, Y S


Report Date : May 1964


Pagination or Media Count : 196


Abstract : This thesis is an experimental study of the behavior of footing-soil systems subjected to vibratory loads. The base of the footing consisted of six independent concentric circular rings connected through load cells to a rigid mass. The footing, resting on the surface of a sand bed, was set into steady state vibration by an electromagnetic oscillator. From measurements of the periodic variations of loads on each ring, the inertia force of the mass, and the input force, it was possible to obtain information on the changes in distribution of dynamic pressure amplitude, the phase relations for the six segments of the footing base, and data needed to establish empirical values for the displacement functions associated with the theoretical approach. The experimental results were analyzed and compared with the theoretical work, which regarded the system to be an idealized circular mass resting on the surface of a homogeneous, isotropic, semi-infinite elastic body. (Author)


Descriptors :   LOADING(HANDLING) , VIBRATION , EXPERIMENTAL DATA


Distribution Statement : APPROVED FOR PUBLIC RELEASE