Гомон, П. С. та Homon, P. S. (2021) ОСОБЛИВОСТІ ПОБУДОВИ ДІАГРАМИ «МОМЕНТ–КРИВИНА» ПІДСИЛЕНИХ БАЛОК З ДЕРЕВИНИ ПРЯМОКУТНОГО ПЕРЕРІЗУ. Вісник Національного університету водного господарства та природокористування (3(95)). с. 128-138.

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Анотація

Розроблено алгоритм побудови діаграми «момент–кривина» для підсиленого згинального дерев’яного елемента прямокутного перерізу. Показано приклад побудови таких діаграм. Наведено порівняння теоретичних та експериментальних досліджень. Наведено графік залежності висоти стиснутої зони від зміни кривини перерізу. Встановлено, що підсилення дерев’яного елемента прямокутного перерізу в стиснутій та розтягнутій зоні сприяє збільшенню несучої здатності.

Title in English

"MOMENT–CURVE" DIAGRAM DRAWING PECULIARITIES FOR REINFORCED WOOD BEAMS WITH RECTANGULAR CROSS-SECTION

English abstract

A detailed analysis of recent research on this issue. It was found that the reinforcement was mainly carried out in one of the zones of the bending wooden element – compressed or stretched. The method of theoretical and experimental researches with reinforcement of wooden beams with rectangular section in compressed and stretched zones is worked out in detail. Large-scale experimental and theoretical studies to research the strength and deformability of the studied beams. An algorithm for constructing a "moment-curve" diagram for a reinforced wooden bending element of rectangular cross-section has been developed. The order of construction of the diagram "moment-curve" for the strengthened wood elements with rectangular form is resulted. Features and an example of construction of such diagrams for all investigated types of beams are established. The initial data for the calculation are given, in particular, the strength and deformation characteristics of wood materials, reinforcement, Sika Carbo Dur tape (critical deformations, ultimate strength and initial modulus of elasticity) are given. A comparison of theoretical and experimental studies of such elements is given. The actual stress-strain state of a reinforced wooden element with rectangular cross-section in compressed and stretched zones is established and shown. The graph of the dependence of the height of the compressed zone on the change of the curvature of the section for all investigated reinforced and unreinforced wooden beams is given. It has been established that the reinforcement of a wooden element with rectangular cross-section contributes to the increase of bearing capacity due to reinforcement with steel reinforcement and Sika Carbo Dur S-512 tape. It has been found that the most effective way to reinforce bending wooden elements is to reinforce in compressed and stretched areas at the same time.

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