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Abstract

The paper presents analysis of effect of structural soil backfill parameters on load capacity of culvert made as buried flexible steel structure. The work is divided into two parts. The first part is devoted to the assumptions of the Sundquist-Pettersson method. The principles of the analysis of the structure in terms of ultimate limit strength, serviceability and fatigue in permanent and temporary calculation situations are described. The second part presents a design example of a soil steel composite bridge in the form of a closed profile culvert made of MulitiPlate-type corrugated sheet. The static and strength calculations were conducted according to the Sundquist-Pettersson method and the guidelines presented in the Eurocodes. According to the guidelines, the value of the backfill tangent modulus was determined using the simplified (A) and precise (B) methods. It was found that the modulus values determined by the simplified method were about three times lower than for the exact method, leading to very conservative, uneconomical results. The structural calculations using the tangent modulus determined by the simplified method, indicated that the load capacity of the structure was exceeded, regardless of the thickness of the backfill used (in the range from 0.5 to 5 m). The use of the tangent modulus determined using the precise method resulted in a significant reduction in stress to bearing capacity ratio of analysed parameters. Similar reduction was observed with the increase in the thickness of the backfill.
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Bibliography


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[16] D. Bęben, “Soil-steel bridges. Design, maintenance and durability”, 1nd ed., Springer, Cham, 2020.
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[28] P. G. Kossakowski, “Influence of Initial Porosity on Strength Properties of S235JR Steel at Low Stress Triaxiality”, Archives of Civil Engineering, vol. 58, no. 3, pp. 293–308, 2021. https://doi.org/10.2478/v.10169-012-0017-9
[29] P. G. Kossakowski, “Experimental Determination of the Void Volume Fraction For S235JR Steel at Failure in the Range of High Stress Triaxialities”, Archives of Metallurgy and Materials, vol. 62, no. 1, pp. 167–172, 2017. https://doi.org/10.1515/amm-2017-0023
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Authors and Affiliations

Michał Bakalarz
1
ORCID: ORCID
Paweł Kossakowski
1
ORCID: ORCID
Wiktor Wciślik
1
ORCID: ORCID

  1. Kielce University of Technology, Faculty of Civil Engineering and Architecture, Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
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Abstract

Basing on the analysis of 440 vegetation plots (relevés) a classification scheme of sand biotopes of Chernihiv Polesie (Northern Ukraine) of levels IV–VI was compiled. Biotopes, protected by the Resolution 4 of the Bern Convention and Annexes II and IV of the Habitat Directive, were identified. The comparative characteristics of biotopes and syntaxa of vegetation according to floristic classification were given. Characteristics of the represented biotopes were described. The biotopes R1Q, R1P, R1M (EUNIS, 2021) appeared to be the most represented for the sands of Northern Ukraine. Fourteen biotopes of Chernihiv Polesie sands, protected by Council Directive 92/43/EEC of 21 May 1992, were revealed.
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Authors and Affiliations

Hanna Danko
1

  1. T.H. Shevchenko National University “Chernihiv Colehium” Hetman Polubotok Str. 53, 14013 Chernihiv, Ukraine
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Abstract

The floristic investigations were conducted on three spoil heaps situated in the town of Ruda Śląska. The aim of the study was to determine similarities and differences among spoil heaps based on qualitative and quantitative analyses of the flora. There were 248 species of vascular plants observed on the investigated objects. The native species (apophytes) dominate in the spoil heaps flora (above 80%). The most numerous life forms are hernicryptophytes. The rudera) and meadow species are the most abundant among ecological groups. The analysis of the ecological indicators shows predominance of heliophilous species, which prefer temperate thermal and moisture conditions. The investigated flora demonstrates large tolerance spectrum of trophism and pH of soil.
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Authors and Affiliations

Gabriela Woryna
Adam Rostański
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Abstract

An enormous output of Bertrand Russell breaks down into three groups. The first consists of works on logic, especially on philosophy of mathematics. But the program of reducing mathematics to logic, instead of providing certainty that Russell was looking for, multiplied our doubts. As a by‑product of these works, a program of logical analysis of ordinary language emerged and exerted a huge impact on the history of philosophy of the 20th century. But it did not fulfil the original hopes connected with it. The second group contains results of ontological and epistemological investigations. Here Russell achieved nothing, and what he proposed lay beyond the mainstream of 20th‑century ontology and epistemology. The third group was an outline of a social utopia, addressed to the general public. Professional philosophers ignored these works by Russell, and as a possible program to build a better world, they have become obsolete.
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Authors and Affiliations

Wojciech Sady
1
ORCID: ORCID

  1. Uniwersytet Śląski w Katowicach, Instytut Filozofii, ul. Bankowa 11, 40-007 Katowice
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Abstract

In this text I try to present formal and functional picture of the preposition ‘vo’ in the Macedonian dialects. Also, I show the geographic distribution of the preposition ‘u’ (with the meaning at, beside). This helps to see how the prepositions ‘vo’ and ‘u’ are spread over the Macedonian dialectal territory, and also to see their formal and functional distribution.

The prepositions ‘vo’ and ‘u’ are among the differential features that divide the western dialectal complex from southeastern dialectal complex. The two maps show that borders of their territories mainly correspond with the dialectal borders of two dialectal complexes.

Regarding their functional fields – in the frames of the spatial relations (static vs. dynamic) both forms cover same fields. Thus, regarding static relation, both ‘vo’ (western complex) and ‘u’ (southeastern and northern complex) are used as markers of the position of the localized object regarding the localizer, i.e. the situations where a localized object takes part of the space determined by the localizer. Regarding the dynamic relation, we can see the same results, i.e. both ‘vo’ and ‘u’ are used as markers of the adlative relation (goal) which is the approximation of the localized object to the inside or inside borders of the localizer.

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Authors and Affiliations

Марјан Марковиќ
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Abstract

This paper presents two rare 16th-century panel-stamped bindings from the collections of the Kórnik Library. The first one, decorated with an impression of a panel depicting the personification of the Christian virtue of Hope (Spes), protects the printed book published in 1545. The binding was made by a Netherlandish bookbinder working in Leuven, called Master IP, identified with Jacob Pandelaert (d. ab. 1563). The second binding presents a Gothic motif of animals-in-foliage and protects a printed book published in 1550. The authorship of the panel (the so-called de profundis) is attributed to a bookbinder working in the town of ’s-Hertogenbosch (fr. Bois-le-Duc), Geraert van der Hatart (d. ab. 1540/1541). Both these bindings testify to the fact that the holdings of the Kórnik Library include gems of the West-European bookbinding craft.
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Authors and Affiliations

Tomasz Zuzek
1
ORCID: ORCID

  1. Biblioteka Kórnicka
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Abstract

In 2015 Supreme Audit Office published the report concerned the quality of doctoral studies in Poland. Result of the conducted audit is alarming: “there are serious doubts both about quality and effectiveness of mass doctoral education” (SAO 2015). The text presents an overview of university regulations concerned the evaluation of annual achievements of PhD students (in the area of social sciences) and indicates its potentially negative consequences for the quality of their academic activity. The article refers to two terms – “running for points” and “parametric game”– introduced by Emanuel Kulczycki to describe consequences of economization of research evaluation system, i.e. measuring academic activities and turning them into points-based rewards.

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Authors and Affiliations

Agnieszka Anielska

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