ANALYSIS OF REINFORCED CONCRETE ELEMENTS FOR THE BEARING CAPACITY OF SLOPING SECTIONS BY DIFFERENT METHOD

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Visnyk LNAU: Architecture and Farm Building 2017 №18: 82-88

ANALYSIS OF REINFORCED CONCRETE ELEMENTS FOR THE BEARING CAPACITY OF SLOPING SECTIONS BY DIFFERENT METHOD

Mazurak A., Ph.D., professor, department technology and construction organization,
Kovalyk I., Senior Lecturer, department technology and construction organization,
Mihaylechko V., Senior Lecturer, department technology and construction organization,
Andrushkiv O., assistent, department technology and construction organization,
Lviv National Agrarian University

https://doi.org/10.31734/architecture2017.18.082

Annotation

The problem of estimating reinforced concrete elements with the bearing capacity of sloping sections still remains relevant, in spite of the large number of available methodologies and normative proposals for calculation. This leads to the use of different methods of calculation, which in some cases leads to over-consumption of materials and complications of reinforcement, while in others it does not ensure the reliability of the operation of projected structures.

Our task is to determine the experimental and theoretical parameters of the reinforced reinforced concrete elements by the bearing capacity of sloping sections.

For theoretical and experimental researches, methods of evaluation of reinforced reinforced concrete elements for the bearing capacity of inclined sections, which were applied to domestic, foreign norms and researchers who studied such problem, were used.

For reinforced concrete beam structures, which do not require cross-sectional reinforcement, shear strength and cut, the main criterion is design. The main reasons for the destruction, which is important to evaluate for design - is the fragile behavior of structures in the supporting zone with partial or complete deformation of the material. Despite numerous studies in this area, the assessment of sloping sections of reinforced and pre-stressed reinforced concrete structures remains a complex phenomenon so that calculation approaches are often carried out in empirical or simplified views.

Our main task is to analyze the behavior of reinforced sections, inclined to the longitudinal axis, using transverse reinforcement, as well as to highlight the optimal recommendations and calculation models adapted for practical specialists in real construction. The analysis of the results was carried out on real models of reinforced concrete beams, made on heavy concrete with a cross section of 240 x 80 mm in length of 2300 mm to 240 x 120 (160) mm after amplification. The total number of beams was 11 pieces. The beams are united in a series depending on the number of transverse reinforcement and the shoulder of the force application.

Having analyzed the research of reinforced reinforced concrete elements with the carrying capacity of sloping sections, the corresponding methods Eurocode 2 , FIB 2010b , norms SNiP 2.03.01-84 * and RILEM TC 162-TDF can be reached. the conclusion that the approaches to determining the bearing capacity differ significantly from each other and have fundamental differences in the calculation algorithm, resulting in a discrepancy in their values. In our opinion, it is expedient to continue theoretical and experimental studies in order to obtain results of calculation close to the experimental values.

Key words

bearing capacity, advanced-section reinforced concrete beam

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