Analysis of an Effectiveness of Expansion Joints in the Multi-Family Building Loaded by Mining Activities

Abstract

There are a lot of possibilities to protect the existing building against the negative impact arising from conducted or projected mining exploitation. These additional loads on the mining area are dependent, among others, from the effects on the surface from an exploitation of coal. One of the basic methods of protection of a building is to carry out the distribution of an object into smaller and regular in a horizontal section parts, what is called dilatation. In consequence of this treatment the decrease of the effort of supporting elements, additional loaded by mining impacts, is expected. The problem is realization of a proper and efficient dilatation in a complicated plan of an existing building. The paper contains the results of numerical analyzes of a model of a multi-family building with a large and irregular horizontal projection, where two systems of expansion joints were used. The results were compared to the results of the analysis of a model without taking into account additional building protection. The different solutions of the analyzes, where the different directions of mining were included, are presented. The distribution of forces in the bearing walls of the building was analyzed.

The Specificity of Dynamic Resistance of Existing Bridge Structures in Mining Areas

“…Loads were set according to the unique combination (5) with simultaneous application of cross-sectional forces and load-bearing capacity of critical sections, due to bending and shearing. Therefore, it is possible to estimate the resistance of the structure to the impact of mining tremors according to the relationship (6). The assessment of the viaduct load-bearing structure resistance using bending moments and lateral forces was supplemented by checking the load-bearing system resistance to horizontal forces.…”

“…The problem of design and structure analysis in the field of dynamic impact is complex [3][4][5][6] and still uncertain [7]. It is worth noting that the greatest simplifications usually relate to dynamic load [8].…”