Partial Loss Of Support And Frame-Soil Interaction

Allam, MM and Rao, KSS and Subramanya, BVV (1987) Partial Loss Of Support And Frame-Soil Interaction. In: Journal of Structural Engineering, 113 (12). pp. 2488-2499.

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Abstract

An interaction analysis has been conducted to study the effects of a local loss of support beneath the beam footing of a two-bay plane frame. The results of the study indicate that the magnitude of increase in the bending moment and axial force in the structure due to the presence of a void are dependent, not only on the extent of support loss, but also on the relative stiffnesses between foundation beam and soil, and between superstructure and soil. The increase in bending moment even for a void span of 1/12 of the foundation beam length can become so significant as to exceed the safety provisions. The study shows that the effect of a void on the superstructure moments can be greatly minimized by a combination of rigid foundation and flexible superstructure.

Item Type:	Journal Article
Publication:	Journal of Structural Engineering
Publisher:	Asce-Amer Civil Engineers
Additional Information:	Copy right of this article belongs to Asce-Amer Civil Engineers.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	12 Jan 2010 09:20
Last Modified:	19 Sep 2010 05:32
URI:	http://eprints.iisc.ac.in/id/eprint/20299

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