Vertical loading tests on a simplified tree root prototype

Andrea Marsiglia, Matteo O. Ciantia, Andrea Galli, D. Canepa

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

Abstract

The increasing number of extreme weather events, often accompanied by very intense wind gusts, can cause diffuse damages to arboreal heritage, which hence represents a severe hazard in urban areas for buildings, cars, structures, infrastructures and even human lives. From a geotechnical perspective, assessing the stability of a tree against uprooting represents a problem of interaction between the soil and the root system, subject to complex loading conditions. The experimental study presented in this paper approaches such a problem by considering a 1D vertical loading condition, both under compressive and tensile loads, for a simplified small-scale tree prototype with a flat root system, resting in a dry mid-loose Ticino sand deposit. The root system is conceptually assimilated to a direct foundation, and the role of the bending and the tensile behaviour of the different root components is highlighted, by considering both monotonic and non-monotonic quasi-static loading paths. The influence of several geometrical parameters is investigated, and the results highlight the need of a large displacement approach, also considering second order geometrical effects, to correctly interpret the results. These latter can be considered preparative to the development of more complex 3D experimental tests and theoretical interpretative frameworks.
Original languageEnglish
Title of host publicationPhysical Modelling in Geotechnics
Place of PublicationSeoul
PublisherKorean Geotechnical Society
Pages832-835
Number of pages4
ISBN (Electronic)9788995219775
Publication statusPublished - Sep 2022

Publication series

NameICPMG 2022 Proceedings

Keywords

  • root-soil interaction
  • tree stability
  • macroelement model
  • small-scale experimental tests
  • large displacement approach

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