A numerical simulation on the dynamic response of MSE wall with LWA backfill

H. Munjy, F. M. Tehrani, M. Xiao, M. Zoghi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This paper describes the finite element analysis of an alternative mechanically-stabilized-earth (MSE) wall, subject to dynamic loading using PLAXIS®-2D. The model incorporates Lightweight expanded shale aggregates (LWA) as backfill materials. Dynamic loading includes sinusoidal harmonic motions from 0.2 to 6Hz frequencies. The numerical simulation is used to verify experimental shake-table studies on a small-scale prototype. The model features multiple layers of backfill materials reinforced with synthetic geo-grid sheets and loaded with a shallow foundation. Discussions include the effectiveness of numerical techniques to model various features of the MSE wall. Numerical results are compatible with the shake-table experimental data. Further, simulations indicate the effectiveness of using equivalent springs in the small-scale model to replicate absorbent boundaries in a true-scale MSE wall. Moreover, the numerical output shows the sensitivity of MSE wall response to the frequency of the base excitation. However, the effect of damping is not readily exhibited in analysis. In summary, the results contribute to better understanding of MSE response to seismic events, performance of lightweight backfills, and reliability of numerical solutions, while warranting further analytical work using advanced soil models.

Original languageEnglish (US)
Title of host publicationNumerical Methods in Geotechnical Engineering - Proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014
PublisherTaylor and Francis - Balkema
Pages1147-1151
Number of pages5
ISBN (Print)9781138026889
DOIs
StatePublished - Jan 1 2014
Event8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014 - Delft, Netherlands
Duration: Jun 18 2014Jun 20 2014

Publication series

NameNumerical Methods in Geotechnical Engineering - Proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014
Volume2

Other

Other8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014
CountryNetherlands
CityDelft
Period6/18/146/20/14

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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    Munjy, H., Tehrani, F. M., Xiao, M., & Zoghi, M. (2014). A numerical simulation on the dynamic response of MSE wall with LWA backfill. In Numerical Methods in Geotechnical Engineering - Proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014 (pp. 1147-1151). (Numerical Methods in Geotechnical Engineering - Proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2014; Vol. 2). Taylor and Francis - Balkema. https://doi.org/10.1201/b17017-203