Wyniki wyszukiwania - BazTech

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Wybrane aspekty obliczania naprężeń w rozciąganym zbrojeniu podłużnym w zginanych belkach zespolonych stalowo-betonowych

Niedośpiał M.

Przegląd Budowlany

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2018

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R. 89, nr 2

40--42

PL

Przy obliczaniu zarysowania w rozciąganej płycie żelbetowej konieczna jest znajomość naprężeń w rozciąganym zbrojeniu. Należy wprowadzić rozróżnienie obszarów w bezpośrednim otoczeniu węzła i w pewnym oddaleniu od niego. W przypadku pierwszym nie obowiązuje zasada płaskich przekrojów i naprężania w węźle należy obliczać korzystając np. z równowagi węzła i metody składnikowej opisanej w normie. Natomiast w pewnej odległości od węzła zasada płaskich przekrojów obowiązuje i naprężania w zbrojeniu można obliczać korzystając z teorii klasycznej.

EN

When calculating the tight crack in the stretched reinforced concrete board, it is necessary to know the strains in stretched reinforcement. It is important to differentiate the areas in the direct vicinity of the node and at a certain distance from it. In the first case, the principle of flat cross sections does not apply and the strains in the node need to be calculated using e.g. the node balance and the component method described in the norm. However, at a certain distance from the node, the principle of flat cross sections does apply and the strains in the reinforcement may be calculated using the classic theory.

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Force and stress calculation in DC dielectrophoresis

Kurgan E.

Poznan University of Technology Academic Journals. Electrical Engineering

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2012

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No. 69

111--116

EN

In this paper, two-dimensional direct current (DC) dielectrophoresis is presented. First electric field distribution in particle and surrounding fluid is calculated and next stresses acting from both sides suspension-particle boundary are evaluated. These values are fundamental for force calculation in two-dimensional dielectrophoresis and in simulation of the velocity distribution in interdigitated electrodes.

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Application of evolutionary algorithm and graph-based method of stress calculation to truss optimization

Zawiślak S., Jagosz A.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2008

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z. 165

253-262

EN

In the paper, the method of optimization of 2-D trusses is discussed. The graph-based method was used for calculation of stresses in the truss bars. Some other papers where graphs are used for truss analysis are cited but usually rather different calculation engines were used. The evolutionary algorithm was utilized for optimization of trusses. The truss topology was assumed. The optimization task consists in changes of the coordinates of the nodes of the truss. An evolutionary approach is characteristic for a non-standard constructional solution (design) search which can be performed analyzing the whole population containing the solutions i.e. the optimal truss as well as other trusses enclosed in a population. There is a possibility that choosing a final truss some personal preferences of a designer can be taken into account. Some exemplary results of own computer program are enclosed.