Comparison of Cushioning Mechanisms between Cellular Glass and Gabions Subjected to Successive Boulder Impacts
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 9
Abstract
Gabions are the most commonly adopted cushion layer for shielding rigid debris-resisting barriers against boulder impact. Despite the prevalent use of gabions, they comprise heavy rock fragments that are not easily transported up steep natural terrain. The advent of using light-weight cellular glass as an alternative cushion layer provides an innovative approach for absorbing impact energy. However, a lack of insight on their load attenuation characteristics has hindered its potential implementation. In this study, cellular glass was subjected to successive impacts to replicate the dynamic loading of boulders by using a large-scale pendulum setup. Results reveal that for a single impact at 70 kJ, crushing exhibited by cellular glass leads to 25% lower impact force compared to gabions, which rely predominantly on rock fragment rearrangement to absorb energy. However, gabions exhibit more effective load spreading, with a diffusion angle three times greater than cellular glass. To ensure robust designs for cellular glass, the Johnson’s damage number is proposed to quantify the plastic deformation and to improve estimates of the cushioning efficiency represented by the load-reduction factor () used in current design.
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Acknowledgments
This paper is published with the permission of the Head of the Geotechnical Engineering Office, and the Director of Civil Engineering and Development of the Government of the Hong Kong Special Administrative Region. The authors are grateful for financial support from the theme-based research grant T22-603/15-N provided by the Research Grants Council of the Government of Hong Kong Special Administrative Region, China. The authors would like to gratefully acknowledge the support of the HKUST Jockey Club Institute for Advanced Study and the Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program.
References
Alvarez Grima, M., and R. Babuska. 1999. “Fuzzy model for the prediction of unconfined compressive strength of rock samples.” Int. J. Rock Mech. Min. Sci. 36 (3): 339–349. https://doi.org/10.1016/S0148-9062(99)00007-8.
Anthony, J. L., and C. Marone. 2005. “Influence of particle characteristics on granular friction.” J. Geophys. Res. 110 (B8): 1–14. https://doi.org/10.1029/2004JB003399.
ASTM. 2010. Standard test method for compressive properties of rigid cellular plastics. ASTM D1621. West Conshohocken, PA: ASTM.
Bertrand, D., F. Nicot, P. Gotteland, and S. Lambert. 2005. “Modelling a geo-composite cell using discrete analysis.” Comput. Geotech. 32 (8): 564–577. https://doi.org/10.1016/j.compgeo.2005.11.004.
Bourrier, F., S. Lambert, A. Heymann, P. Gotteland, and F. Nicot. 2011. “How multi-scale approaches can benefit the design of cellular rockfall protection structures.” Can. Geotech. J. 48 (12): 1803–1816. https://doi.org/10.1139/t11-072.
Calvetti, F., and C. di Prisco. 2009. “An uncoupled approach for the design of rockfall protection tunnels.” Struct. Eng. Int. 19 (3): 342–347. https://doi.org/10.2749/101686609788957892.
Choi, K. Y., and R. W. M. Cheung. 2013. “Landslide disaster prevention and mitigation through works in Hong Kong.” J. Rock Mech. Geotech. Eng. 5 (5): 354–365. https://doi.org/10.1016/j.jrmge.2013.07.007.
Cui, P., C. Zeng, and Y. Lei. 2015. “Experimental analysis on the impact force of viscous debris flow.” Earth Surf. Process. Landforms 40 (12): 1644–1655. https://doi.org/10.1002/esp.3744.
Gibson, L. J., and Ashby, M. F. 1997. Cellular solids—Structures and properties. 2nd ed. Cambridge, UK: Cambridge University Press.
Heymann, A., M. Collombet, S. Lambert, and P. Gotteland. 2011. “Use of external testing methods to assess damage on rockfall protection structures.” Appl. Mech. Mater. 82: 704–709. https://doi.org/10.4028/www.scientific.net/AMM.82.704.
Heymann, A., S. Lambert, E. Haza-Rozier, G. Vinceslas, and P. Gotteland. 2010. “An experimental comparison of half-scale rockfall protection sandwich structures.” In Proc., Structures under Shock and Impact XI -SUSI XI. Southampton, UK: Wit Press.
Hungr, O., G. C. Morgan, and R. Kellerhals. 1984. “Quantitative analysis of debris torrent hazards for design of remedial measures.” Can. Geotech. J. 21 (4): 663–677. https://doi.org/10.1139/t84-073.
Jackson, K. E. 2010. “Predicting the dynamic crushing response of a composite honeycomb energy absorber using solid-element-based models in LS-DYNA.” In Proc., 11th Int. LS-DYNA Users Conf. Livermore, CA: Livermore Software Technology Corporation.
Johnson, C. G., B. P. Kokelaar, R. M. Iverson, M. Logan, R. G. LaHusen, and J. M. N. T. Gray. 2012. “Grain-size segregation and levee formation in geophysical mass flows.” J. Geophys. Res. 117 (F1): F01032. https://doi.org/10.1029/2011JF002185.
Johnson, K. L. 1985. Contact mechanics. London, UK: Cambridge University Press.
Johnson, W. 1972. Impact strength of materials. London: Edward Arnold.
Kwan, J. S. H. 2012. Supplementary technical guidance on design of rigid debris-resisting barriers. Hong Kong: Geotechnical Engineering Office.
Lambert, S., P. Gotteland, and F. Nicot. 2009. “Experimental study of the impact response of geocells as components of rockfall protection embankments.” Nat. Hazard. Earth Syst. Sci. 9 (2): 459–467. https://doi.org/10.5194/nhess-9-459-2009.
Lambert, S., A. Heymann, P. Gotteland, and F. Nicot. 2014. “Real-scale investigation of the kinematic responses of a rockfall protection embankment.” Nat. Hazard. Earth Syst. Sci. 14 (5): 1269–1281. https://doi.org/10.5194/nhess-14-1269-2014.
LS-DYNA. 2012. LS-DYNA keyword user’s manual, version 971. Livermore, CA: Livermore Software Technology.
Muthuswamy, M., and A. Tordesillas. 2006. “How do interparticle contact friction, packing density and degree of polydispersity affect force propagation in particulate assemblies?” J. Stat. Mech: Theory Exp. 2006 (9): P09003. https://doi.org/10.1088/1742-5468/2006/09/P09003.
Ng, C. W. W., C. E. Choi, A. Y. Su, J. S. H. Kwan, and C. Lam. 2016. “Large-scale successive impacts on a rigid barrier shielded by gabions.” Can. Geotech. J. 53 (10): 1688–1699. https://doi.org/10.1139/cgj-2016-0073.
Peila, D., C. Oggeri, and C. Castiglia. 2007. “Ground reinforced embankments for rockfall protection, design and evaluation of full scale tests.” Landslides 4 (3): 255–265. https://doi.org/10.1007/s10346-007-0081-4.
Schellenberg, K., A. Volkwein, A. Roth, and T. Vogel. 2006. “Rockfall-falling weight tests on galleries with special cushion layers.” In Proc., 3rd Int. Conf. on Protection of Structures against Hazards, 1–8. Singapore: CI-Premier Conference Organisation.
Schellenberg, K., A. Volkwein, A. Roth, and T. Vogel. 2007. “Large-scale impact tests on rock fall galleries.” In Proc., 7th Int. Conf. on Shock and Impact Loads on Structures, 497–504. Singapore: CI-Premier Conference Organisation.
Zegowitz, A. 2010. “Cellular glass aggregate serving as thermal insulation and a drainage layer.” In Vol. 2010 of Proc., Buildings Conf., 1–8. Atlanta, GA: ASHRAE.
Zeng, C., P. Cui, Z. Su, Y. Lei, and R. Chen. 2015. “Failure modes of reinforced concrete columns of buildings under debris flow impact.” Landslides 12 (3): 561–571. https://doi.org/10.1007/s10346-014-0490-0.
Zhang, L., N. G. H. Nguyen, S. Lambert, F. Nicot, F. Prunier, and I. Djeran-Maigre. 2017. “The role of force chains in granular materials: From statics to dynamics.” Eur. J. Environ. Civ. Eng. 21 (7–8): 874–895. https://doi.org/10.1080/19648189.2016.1194332.
Zhao, Y. P. 1998. “Predictions of structural dynamic plastic shear failure by Johnson’s damage number.” Forsch. Ingenieurwes. 63 (11–12): 349–352. https://doi.org/10.1007/PL00010753.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 21, 2017
Accepted: Feb 21, 2018
Published online: Jun 25, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 25, 2018
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