Numerical modelling

Laboratory of Rock Deformation

Researchers from the Laboratory are engaged in extensive studies on numerical modelling of interactions between the ground and buildings subjected to various deformations, including those induced by ongoing mining operations. The calculations are supported by ABAQUS — the Finite Element Method software, available thanks to collaboration with Academic Computer Centre Cyfronet AGH.

The numerical analysis reveals the condition of the building structure due to processes affecting the ground. The methods take into account elastic-plastic-viscous behaviour of the rock strata and enable the simulations of the movements of a geometrically and time-variant subsidence trough.

Modelling of a subsidence trough movement under the building (horizontal displacement field)

3D modelling of building-ground interactions: 1. Model geometry, 2. FEM grid, 3. Horizontal displacement field

Selection of material laws applicable to geological materials

Laboratory testing of geologic samples supported by numerical simulations of experiments give us a good insight into the behaviour of the given material.

Numerical modelling of the stress and strain distribution in rock samples subjected to laboratory testing helps in interpretation of test results (rock parameters) and facilitates the test procedure, affording us the means to check whether the rock properties determined in laboratory tests should agree well with computation data, that is achieved with the use of FEM simulation of the test conditions. In order to determine the relationship between the forces acting upon the rock sample and the registered displacements, the material laws applicable to geological materials have to be selected accordingly. Actually, the FEM analysis is used to test and modify not only the value of established constants, but also the adequacy of applied material laws.

Computer simulation of triaxial compression testing of a salt sample

INFORMATION: dr hab. inż. Lucyna Florkowska, prof. IMG PAN

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