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FLAC Based Numerical Studies on Dynamic Interference of Two Nearby Embedded Machine Foundations

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Abstract

This paper emphasizes on the dynamic interaction of two closely spaced embedded square or rectangular foundations under the action of machine vibration. One of the foundations is excited with a known vibration source placed on the top of it, called the active foundation. The objective is to study the effect of dynamic motion of the active foundation on the nearby passive foundation through a layered soil medium. The analysis is performed numerically by using the explicit finite difference code FLAC 3D. The soil profile is assumed to obey the Mohr–Coulomb yield criteria with non-linear failure envelope. The analysis is performed under sinusoidal dynamic loading with varying amplitude. Under the dynamic excitation, the settlement behavior of the interacting foundations is studied by varying the spacing between the foundations. In addition, the variation of vertical normal and shear stress developed beneath the interacting foundations is also explored. The present theoretical investigation indicates that the settlement and vertical normal stress below the active foundation is generally found to be higher than that obtained for the passive foundation, whereas the shear stress response below the foundations follows the reverse trend.

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Acknowledgments

The author wants to acknowledge the financial support provided by the Department of Science and Technology (DST), India to carry out the present work through a sponsored research project.

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  1. Department of Civil Engineering, Indian Institute of Technology, Kanpur, 208 016, India

    Priyanka Ghosh

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  1. Priyanka Ghosh
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Correspondence to Priyanka Ghosh.

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Ghosh, P. FLAC Based Numerical Studies on Dynamic Interference of Two Nearby Embedded Machine Foundations. Geotech Geol Eng 30, 1161–1181 (2012). https://doi.org/10.1007/s10706-012-9530-5

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  • DOI: https://doi.org/10.1007/s10706-012-9530-5

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