Vertical uplift resistance of two closely spaced horizontal strip anchors embedded in cohesive-frictional weightless medium

Sahoo, Jagdish Prasad and Kumar, Jyant (2014) Vertical uplift resistance of two closely spaced horizontal strip anchors embedded in cohesive-frictional weightless medium. In: CANADIAN GEOTECHNICAL JOURNAL, 51 (2). pp. 223-230.

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Abstract

The vertical uplift resistance of two closely spaced horizontal strip plate anchors has been investigated by using lower and upper bound theorems of the limit analysis in combination with finite elements and linear optimization. The interference effect on uplift resistance of the two anchors is evaluated in terms of a nondimensional efficiency factor (eta(c)). The variation of eta(c) with changes in the clear spacing (S) between the two anchors has been established for different combinations of embedment ratio (H/B) and angle of internal friction of the soil (phi). An interference of the anchors leads to a continuous reduction in uplift resistance with a decrease in spacing between the anchors. The uplift resistance becomes a minimum when the two anchors are placed next to each other without any gap. The critical spacing (S-cr) between the two anchors required to eliminate the interference effect increases with an increase in the values of both H/B and phi. The value of S-cr was found to lie approximately in the range 0.65B-1.5B with H/B = 1 and 11B-14B with H/B = 7 for phi varying from 0 degrees to 30 degrees.

Item Type:	Journal Article
Publication:	CANADIAN GEOTECHNICAL JOURNAL
Publisher:	CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
Additional Information:	copyright for this article belongs to CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS, 1200 MONTREAL ROAD, BUILDING M-55, OTTAWA, ON K1A 0R6, CANADA
Keywords:	anchors; finite elements; interference; limit analysis; optimization; uplift resistance
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	25 Mar 2014 09:36
Last Modified:	25 Mar 2014 09:36
URI:	http://eprints.iisc.ac.in/id/eprint/48631

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