Étude expérimentale de la chute de blocs rocheux sur une dalle en béton armé recouverte par des matériaux amortissants

Labiouse, V.; Descoeudres, F.; Montani, Stefania; Schmidhalter, C.-A.

doi:10.1051/geotech/1994069041

Cited by 17 publications

(16 citation statements)

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“…In this section the experimental results obtained by Labiouse et al (1994) by performing small-scale tests are numerically reproduced. The experiments consider boulders with a circular cross-section, as illustrated in Fig.…”

Section: Impact On Dense Sand Stratamentioning

confidence: 99%

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A rheological model for the description of boulder impacts on granular strata

Prisco

Vecchiotti

2006

Géotechnique

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This paper considers the mechanics of rock boulders impacting on granular strata. The study is aimed at improving the numerical methods devoted both to describing boulder trajectories along slopes and designing preventive structures in mountain regions. The problem is analysed by using a simplified approach inspired by the lumped mass method. This is based on (a) the macroelement concept, (b) the definition of generalised stresses and displacements, and (c) delayed plasticity theory. Both vertical and inclined impacts on horizontal strata and vertical impacts on inclined slopes are discussed. The numerical results are obtained by using a finite difference numerical discretisation to integrate, over time, a coupled system of two-dimensional differential equations. Most of the input data requested by the model are basic and geotechnically meaningful, and comparison of the numerical results with the experimental data seems to be quite promising.

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Section: Impact On Dense Sand Stratamentioning

confidence: 99%

“…The boulders had masses of 100, 500 and 1000 kg; they fell from a maximum height of 10 m vertically, and impacted on a perfectly horizontal (ø ¼ 08) dissipative sand cushion placed on a reinforced concrete slab. Further details are given in Labiouse et al (1994).…”

Section: Impact On Dense Sand Stratamentioning

confidence: 99%

A rheological model for the description of boulder impacts on granular strata

Prisco

Vecchiotti

2006

Géotechnique

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“…Some authors have investigated the behaviour of granular geomaterials through real-scale impact experiments on in-situ soil layers (Pichler et al, 2005), damping material laid on rigid bases (Labiouse et al, 1994;Montani Stoffel, 1998;Calvetti et al, 2005;Schellenberg et al, 2008) as well as on embankments (Burroughs et al, 1993;Peila et al, 2002). Model tests on layers of damping materials (Chikatamarla, 2005;Lorentz et al, 2006) and embankments (Lepert and Corté, 1988;Blovsky, 2002) were also performed.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the impact response of geocells as components of rockfall protection embankments

Lambert¹,

Gotteland

Nicot³

2009

Nat. Hazards Earth Syst. Sci.

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Abstract. Rockfall protection embankments are ground levees designed to stop falling boulders. This paper investigates the behaviour of geocells to be used as components of these structures. Geocells, or cellular confinement systems, are composite structures associating a manufactured envelope with a granular geomaterial. Single cubic geocells were subjected to the impact resulting from dropping a spherical boulder. The geocells were filled with fine or coarse materials and different boundary conditions were applied on the lateral faces. The response is analysed in terms of the impact force and the force transmitted by the geocell to its rigid base. The influence on the geocell response of both the fill material and the cell boundary conditions is analysed. The aim was to identify the conditions resulting in greatest reduction of the transmitted force and also to provide data for the validation of a specific numerical model.

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“…As it was experimentally observed by Labiouse et al, 2 these assumptions have been shown to be oversimplified, and in general not conservative. These usually take only static loads (soil and structure weights) or, in some cases, fictitiously impacts loads into account and they practically use a quasi-static approach.…”

Section: Introductionmentioning

confidence: 98%

“…The impact of a boulder on this type of shelters represents a complex event that, following the interpretation line proposed by Labiouse et al, 2 can be conveniently analysed considering three (in principle coupled) sub-events ( Fig. 2):…”

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confidence: 99%

An Uncoupled Approach for the Design of Rockfall Protection Tunnels

Calvetti

Prisco

2009

Structural Engineering International

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This paper concerns the definition and the discussion of an uncoupled approach for the design of rockfall protection tunnels. This concerns, in particular, the reinforced concrete structures covered by granular soil strata, and it derives from the interpretation of previous experimental test results obtained by performing in situ impact tests on a real structure. The approach is based on the hypothesis of interpreting the system mechanical response by starting from the evaluation of the impact force acting at the boulder-soil interface (where the soil is assumed as an infinitely half space), then by describing the propagation of stresses throughout a soil stratum placed on a rigid and fixed lower boundary. Some engineering considerations about the consequent dynamic excitation of the reinforced concrete structure (the sheltering tunnel) are also added.

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Étude expérimentale de la chute de blocs rocheux sur une dalle en béton armé recouverte par des matériaux amortissants

Cited by 17 publications

References 0 publications

A rheological model for the description of boulder impacts on granular strata

A rheological model for the description of boulder impacts on granular strata

Experimental study of the impact response of geocells as components of rockfall protection embankments

An Uncoupled Approach for the Design of Rockfall Protection Tunnels

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