Projects / Programmes
Identification of structures, soils and defects
| Code |
Science |
Field |
Subfield |
| 2.01.00 |
Engineering sciences and technologies |
Civil engineering |
|
| Code |
Science |
Field |
| T220 |
Technological sciences |
Civil engineering, hydraulic engineering, offshore technology, soil mechanics |
Identification of structures, identification of mechanical properties, identification of soils, determination of cracks and indetification of their location and depth, identification of defects and displacments in Earth's crust.
Researchers (8)
Organisations (2)
Abstract
The research proposal consists of three mutually connected parts. All the parts belong to the inverse identification problems and thus jointly interchange. The first part considers the identification of transverse cracks on beams from the eigenfrequency measurements. The identification approach with the utilization of eigenfrequencies together with an adequate computational model has been already successfully implemented, but due to the requirement of analytical solution of the governing differential equation the approach was limited to single element structures. Such an approach is thus not applicable to the frame type structures. Besides that, the original computational model is limited to transverse displacements only. Due to the fact that in frame type structures also longitudinal displacements occur the definitions for rotational springs representing cracks must be verified and potentially redefined. Thus verification must be done for both, for the rotational spring stiffness for transverse displacements due to transverse load as well as for the linear spring stiffness for axial displacements due to axial load. After that the next logical step would be the derivation of a finite element based on the established computational model.
The second part considers the relative displacements of Earth's crust along tectonic faults. These displacements, their temporary obstructions and afterwards slips represent the origin of the earthquakes. In order to profound the knowledge about earthquake predictions two methods will be connected: the relative displacements measurements on each side of the fault, and measurements of radon transport. From the simultaneous consideration of the results from both methods new findings about mechanical phenomena along the tectonic faults are expected and these observations should reflect in an adequate mathematical model.
The last part is oriented towards numerical, elastodynamical analysis of mechanically structured half-space, which, first plays supporting role for the second part of the proposed research proposal, and can also be considered as a stand-alone research activity, heading into two directions. The first direction considers the question of "transparent border" within elasto-dynamical problems of mechanically structured half-space, which allows the transformation of the half-space into the space of finite dimensions, consequently allowing the modeling with finite elements. The second direction within this part considers the derivation of expressions for Green's function of mechanically structured half-space expressed with the integrals with the finite borders. These integrals further allow quick and simultaneously sufficiently enough accurate numerical evaluation.
