Experimental study on dynamic interference effect of two closely spaced machine foundations

This paper presents an experimental study on the dynamic interaction effect of closely spaced square foundations under machine vibration. Under dynamic condition, a number of large-scale model tests were conducted in the field, which include a wide range of study on the isolated as well as the interacting footing response resting on the local soil available at Kanpur, India. The dynamic interaction of different combinations (size) of two-footing assembly was investigated by inducing vertical harmonic load on one of the footings (active footing), where the other footing (passive footing) was loaded with the static weight only. The active footing was excited with different magnitudes of dynamic loading and the response was recorded for both the footings, placed at different clear spacing (S). The results are compiled and shown as the variation of displacement amplitude with frequency. The transmission ratio, which predicts the effect of dynamic excitation of the active footing on the passive one, is determined for the interacting footings and plotted with respect to the frequency ratio.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author