| Autor: |
Sobczak-Piąstka, Justyna, Babych, Volodymyr, Karavan, Victor, Polianovska, Olena, Filipchuk, Sergij, Shvets, Igor |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 9/4/2023, Vol. 2928 Issue 1, p1-8, 8p |
| Abstrakt: |
Reinforced-concrete is used for the production of a wide range of constructions, including the structures which resist bending (beams, slabs, crossbars, etc.) as the most popular ones. Concrete is known to be well resistant to compressive stress, while its tensile strength is 10 to 15 times less than its compression strength. In this regard, common world practice proposals provide for the application of layered arrangement of concretes with different strength in height of the cross section for the efficient use of the mechanical characteristics of the materials. Such concrete layers can be arranged depending on the purpose and conditions of the performance of the structures: in some cases, it is expedient to use concrete of greater strength in the compressed zone, in others - in the tensile zone (for example, if it is necessary to have constructions with increased cracking resistance). It is proposed to arrange a layer of concrete with dispersal reinforcement by means of steel fiberin the tensile zone in order to increase the crack resistance of ordinary bending reinforced-concrete elements. The stress-strain state of the cross section of bending elements has been substantiated, thus the force equilibrium formulas which perform in the cross section have been obtained as well as the formula for determining the moment of crack formation of the bending element. A numerical designed experiment has been performed, which has confirmed the possibility of using dispersal reinforcement in the tensile zone in order to increase its cracking resistance, which can be raised by a factor of four. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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