| ATTRIBUTE | VALUE |
|---|---|
| type | C |
| database id | 3801 |
| title | |
| authors | |
| year | 2005 |
| series | Archives of Hydro-Engineering and Environmental Mechanics |
| issue | Vol. 52, No. 1 |
| publisher | Wydawnictwo IBW PAN |
| place | Gdańsk |
| attributes | [published] [reviewed] [scientific] [international reach] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3833 |
| title | Simulations of behaviour of granular bodies using a lattice-gas automaton |
| authors | Jan Kozicki, Jacek Tejchman |
| pages | 21 — 37 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem52str021.pdf |
| keywords | collisions, dissipation, granular flow, gravity, lattice-gas automaton |
| affiliations | |
| abstracts | A lattice-gas automaton of hydrodynamics was used to calculate the kinematics of non-cohesive granular materials during 3 different complex two-dimensional problems: granular pile, granular flow in a vertical channel and granular flow in a parallel/converging silo. In the model, collisions and dissipation of particles were taken into account. The simulation results were qualitatively compared with experimental results. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 5442 |
| title | Loads exerted by floating ice on a cylindrical structure |
| authors | Staroszczyk R. |
| pages | 39 — 58 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem52str039.pdf |
| keywords | floating ice, plate, rheology, creep buckling, finite difference method |
| affiliations | |
| abstracts | The paper is concerned with the problem of interaction between a coherent floating ice cover and a fixed, rigid, vertically-walled circular cylinder. The ice cover, of horizontal dimensions considerably larger than the size of the structure, is assumed to be driven against the structure by wind and water current drag stresses. The floating ice cover is modelled as a plate that is subject to the action of horizontal forces and transverse bending due to the reaction of underlying water. During an interaction event, of a quasi-static character, the ice is modelled as a creeping material the behaviour of which is described by a viscous flow law with two, bulk and shear, viscosities. The viscosities change dramatically in their magnitudes during a transition from converging to diverging deformation of the material to reflect the fact that floating ice offers much less resistance to tensile rather than compressive stresses. By numerical simulations carried out by a finite difference method, the influence of the ice rheological parameters on the distribution of contact stresses at the ice – structure interface is investigated. Two types of boundary conditions at the interface, free-slip and no-slip, are considered, and their effects on the loads sustained by the structure are compared. In addition, creep buckling of the ice sheet near the structure is analysed to determine the critical time at which ice starts to fail due to exceeding its flexural strength at given loading conditions. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 5444 |
| title | Instability line as a basic characteristic of non-cohesive soils |
| authors | Świdziński W., Mierczyński J. |
| pages | 59 — 85 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem52str059.pdf |
| keywords | liquefaction, cyclic mobility, instability |
| affiliations | |
| abstracts | In the paper, the experimental results of undrained response of non-cohesive soil subjected to either monotonic or cyclic loading, are analysed and discussed. The analysis was based on the results of comprehensive testing programme made of "Skarpa" sand investigated in the triaxial compression. Two main undrained behaviours such as liquefaction and cyclic mobility were experimentally identified and studied. In the analysis of undrained behaviour, the concept of steady state of deformation has been adopted. It was shown that the undrained response of non-cohesive soils is governed by different failure mechanisms than in the case of drained samples. In undrained failure mechanism, an important role is played by an instability line, which may be identified with the initiation of potential liquefaction. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3814 |
| title | Fluidised fly-ash cement-bentonite cut-off walls in flood protection |
| authors | Paweł Falaciński, Kazimierz Garbulewski, Zbigniew Kledyński, Zdzisław Skutnik, Katarzyna Ziarkowska |
| pages | 7 — 20 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem52str007.pdf |
| keywords | cut-off walls, slurry properties, fluidised fly-ash, flood protection |
| affiliations |
|
| abstracts | Vertical barrier walls are widely used in environmental control systems to restrict the lateral spreading of liquid or gaseous contaminants and for seepage control through and beneath levees. The barrier walls are constructed in single or two phases using slurry composed mainly of bentonite, cementitious materials and water to maintain the trench stability and finally low hydraulic conductivity of barrier. A turning point in the development of slurry technology arose from research demonstrating the positive effects of blast furnace slag or fly-ashes on slurry properties in terms of reduced hydraulic conductivity. This paper presents the implementation of an experimental section of cut-off wall in the subsoil of a modernised flood embankment along the Vistula River and the results of controlling analyses of applied hardening slurry with an admixture of activated fluidal ashes from hard coal. The results of tests confirm the possibility of practical application of fluidal ashes as active components to hardening slurry and obtaining – depending on the suspension composition – of favourable technological and exploitation properties of this material. |
| attributes | [reviewed] [scientific] |
| language | en |