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Title: Numerical analysis of attenuation effect of EPS geofoam on stress-waves in civil defense engineering
Authors: Wang, Z.-L.
Li, Y.-C.
Wang, J.G. 
Keywords: Decay factor
Empirical formula
EPS geofoam
Geometric dimension
Issue Date: Oct-2006
Citation: Wang, Z.-L., Li, Y.-C., Wang, J.G. (2006-10). Numerical analysis of attenuation effect of EPS geofoam on stress-waves in civil defense engineering. Geotextiles and Geomembranes 24 (5) : 265-273. ScholarBank@NUS Repository.
Abstract: Civil defense shelters are often constructed below ground to provide protection against blast loading. Concrete has been used extensively as a construction material for the defense layer of the shelters. In order to achieve expected attenuation of blast-induced stress-waves, geofoam or cavity inclusions are sometimes embedded in the concrete layer. This paper studies the attenuation of stress-waves in a concrete medium behind a rectangular inclusion of expanded polystyrene (EPS) geofoam with different dimensions. The effects of EPS geofoam inclusions on the reduction of peak axial stress σy and hydrostatic pressure P are studied, respectively. One approximation formula is proposed to correlate the decay factor for peak σy to the dimensions of the EPS geofoam inclusion based on numerical simulations. This formula is applicable in defense engineering design to estimate the decay factors at different locations or the dimensions of EPS geofoam when other parameters are prescribed. Finally, the effects of multiple rectangular inclusions of EPS geofoam on stress-waves are numerically investigated. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Geotextiles and Geomembranes
ISSN: 02661144
DOI: 10.1016/j.geotexmem.2006.04.002
Appears in Collections:Staff Publications

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