Wyniki wyszukiwania - BazTech

1

Measures of Agreement Between Computation Programs and Experiment: The Case of Beams with Circular Cuts in their Webs

Khouadjia Mohamed Lyes Kamel, Temami Oussama, Kessal Oussama, Belkadi Ahmed Abderraouf

Civil and Environmental Engineering Reports

|

2022

|

Vol. 32, no. 1

74--87

EN

In the field of metal construction, cellular beams represent an attractive solution to meeting the various technical and economic constraints, especially for large-span buildings. In particular, they allow components linked to the construction to pass through their openings (ventilation ducts, electrical threads, etc.) and thus contribute to significantly reducing the thickness of the floors. However, the use of such beams requires special attention to comply with the regulations in force, in order to guarantee stability and behavior in line with the challenge of preserving the structures. This article focuses on the analysis of the measures of agreement between experiment and computation programs (strength of materials, Robot structures, and Inflexion-EF) results of the beams with circular cuts in their webs (IPE A 100), supported simply and subjected to a concentrated load. The experimental results show that the vertical displacement resulting from transverse compression is induced by various factors: length, cuts in their webs, location of the load, and stiffening of the beams. The comparison of experimental and theoretical results demonstrates the importance of experimental tests in validating theoretical results.

2

The influence of rectangular openings on the structural behaviour of sandwich panels with anisotropic core

Chuda-Kowalska M., Malendowski M.

Journal of Applied Mathematics and Computational Mechanics

|

2016

|

Vol. 15, nr 3

15--25

EN

Sandwich panels with thin metal sheets and a thick, anisotropic foam core are considered in the paper. While the experiments show a large anisotropy of core’s material, this factor is usually neglected due to elementary assemble of sandwich panels and basically simple boundary conditions. In this paper the problem of rectangular openings is considered. Thus, the influence of two main factors on the response of modelled panels are analysed, mainly: the material model of the PU foam core and openings existing in the panel. Sensitivity analysis with respect to these factors is presented. In the final part of the paper, the conclusions are formulated.

3

Nowe rozwiązanie stropu sprężonego dla budynku hotelowo-konferencyjnego

Derkowski W.

Czasopismo Techniczne. Architektura

|

2011

|

R. 108, z. 2-A/2

239-246

PL

Choć w ostatnich dziesięcioleciach, na świecie obserwuje się dynamiczny rozwój konstrukcji z betonu sprężonego w budownictwie kubaturowym, to w Polsce realizacje kablobetonowych stropów dużych rozpiętości są niezwykle rzadko spotykane. W artykule skrótowo przedstawiono zalety stosowania płyt sprężonych i opisano typowe rozwiązania konstrukcyjne stropów kablobetonowych. Opisano pierwszą w Polsce realizację kablobetonowego stropu gęstożebrowego w budynku hotelowo-konferencyjnym w Krakowie. Wieloprzęsłowe żeberka stropu sprężone zostały ciągłymi cięgnami bez przyczepności, a odciążenie konstrukcji uzyskano przez wypełnienie lekkimi wkładami styropianowymi. Na przykładzie tej realizacji podkreślono również wagę problemu kształtowania otworów w tego typu konstrukcjach.

EN

Although in recent decades, the world observed a dynamic development of prestressed concrete structures in cubature civil engineering, the realization of large span prestressed floor slabs is extremely rare in Poland. The article summarizes the advantages of using prestressed slabs and describes the typical design solutions for PC floors. The first implementation in Poland of prestressed rib-and-rib slab floor in the conference building in Krakow is presented. Multi-span slab's ribs were prestressed with continuous unbonded tendons, and the relief of the structure was obtained by filling it with light polystyrene inserts. On the example of that realization, the importance of the problem of making openings in such structures was also highlighted.