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Abstract

The article presents numerical analysis of a typical residential building in the Upper Silesian Coal Basin, which was erected in the early twentieth century and was not protected against mining ground deformations. The greatest impact of ground deformation on buildings are ground horizontal strain ε and ground curvature K. Numerical calculations included the building and the ground to take into account the effect of soilstructure interaction. The structure of the analysed building was made of masonry with wooden ceiling and roof elements. The ground was implemented as a layer 3.0m below the foundations and 3.0 m outside the building's projection. Construction loads are divided into two stages – permanent and functional loads as well as ground mining deformation. The maximum convex curvature K+ and the horizontal strain of the substrate ε+ were achieved in the 8th load step. The results of the analyses were presented in the form of stress and deformation maps. The most important results are the magnitude of the main tensile stresses σmax, which could to create cracks in the structure may occur after exceeding the tensile strength ft of the material. The presented method can be used to the analysis of endangered building objects by mining ground deformations.
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Bibliography


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Authors and Affiliations

Leszek Szojda
1
ORCID: ORCID
Łukasz Kapusta
2
ORCID: ORCID

  1. Silesian University of Technology, Department of Structural Engineering, ul. Akademicka 5,44-100 Gliwice, Poland
  2. Kielce University of Technology, Department of Environmental, Geomatic and Energy Engineering, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
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Abstract

The research into the use of less costly modifications of road links and networks, and changes in the service of road surroundings aimed at ensuring an improvement of through traffic performance in suburban areas, and on roads passing through built-up areas as small localities, with application of simulation model, is presented in this paper. From among possible designs, the authors investigated and presented the effectiveness of two, i.e. implementation of an additional multifunctional median lane in the road cross-section, and construction of service roads with different locations of intersections (end or middle of the road section).

The analysis is focused on the impact of such changes on traffic performance and road safety. The authors analysed travel speed, delay and share of platoon traffic on a uniform sections of the road for different types of road surroundings service. The study presents the results of analyses of road network before and after modification, and the assessment of:

•impact of access points density and level of their use on road traffic performance,
•impact of driving through road sections in built-up area on building platoon traffic,
•impact of change in the cross-section type on traffic performance.

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Authors and Affiliations

M. Kieć
M. Tracz
S. Gaca

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