Effect of frequency on seismic response of reinforced soil slopes in shaking table tests

Srilatha, N and Latha, Madhavi G and Puttappa, CG (2013) Effect of frequency on seismic response of reinforced soil slopes in shaking table tests. In: GEOTEXTILES AND GEOMEMBRANES, 36 . pp. 27-32.

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Abstract

This paper studies the effect of frequency of base shaking on the dynamic response of unreinforced and reinforced soil slopes through a series of shaking table tests. Slopes were constructed using clayey sand and geogrids were used for reinforcing the slopes. Two different slope angles 45 degrees and 60 degrees were used in tests and the quantity and location of reinforcement is varied in different tests. Acceleration of shaking is kept constant as 0.3 g in all the tests to maximize the response and the frequency of shaking was 2 Hz, 5 Hz and 7 Hz in different tests. The slope is instrumented with ultrasonic displacement sensors and accelerometers at different elevations. The response of different slopes is compared in terms of the deformation of the slope and acceleration amplifications measured at different elevations. It is observed that the displacements at all elevations increased with increase in frequency for all slopes, whereas the effect of frequency on acceleration amplifications is not significant for reinforced slopes. Results showed that the acceleration and displacement response is not increasing proportionately with the increase in the frequency, suggesting that the role of frequency in the seismic response is very important. Reinforced slopes showed lesser displacements compared to unreinforced slopes at all frequency levels. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	GEOTEXTILES AND GEOMEMBRANES
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright for this article belongs to ELSEVIER SCI LTD, ENGLAND
Keywords:	Shaking table tests;Frequency;Seismic response;Reinforcement;Geogrid;Soil slopes
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	18 Mar 2013 05:26
Last Modified:	18 Mar 2013 05:26
URI:	http://eprints.iisc.ac.in/id/eprint/46074

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