METHODS FOR ASSESSING THE BEARING CAPACITY OF CONCRETE ELEMENTS IN AREAS OF MAXIMUM TRANSVERSE FORCE ACTION

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Visnyk LNAU: Architecture and Farm Building 2016 №17: 116-123

METHODS FOR ASSESSING THE BEARING CAPACITY OF CONCRETE ELEMENTS IN AREAS OF MAXIMUM TRANSVERSE FORCE ACTION

Kovalyk I., Senior Lecturer, department technology and construction organization,
Lviv National Agrarian University

https://doi.org/10.31734/architecture2016.17.116

Annotation

Today and in the near future, reinforced concrete in our country remains the most important constructive material of construction, which can be explained by a large stock of raw materials for the manufacture of binders and fillers, high constructional and operational qualities of reinforced concrete and its reliability.

Preferably, research on reinforced concrete structures has been devoted to studying their work under the action of bending moment. At the same time, almost all concrete structures in one way or another perceive transverse force. For most such designs, the deformability and cracking bones are decisive in determining the size of the cross-section, the transverse and longitudinal reinforcement. However, the problem of the resistance of sloping sections still remains unresolved, especially in cases of amplification.

Due to the unresolved issue of the resistance of sloping sections of reinforced concrete elements in modern design practice, very close methods of calculation are used, which in some cases leads to significant over-consumption of materials and complications of reinforcement, in others - to insufficient design reliability.

Having carried out a theoretical and experimental analysis of the research of the bearing capacity of the elements inclined to the longitudinal axis in accordance with the normative documents of Ukraine DBN V.2.6.-98: 2009, USA ACI 318-95, the former norms SNiP 2.03.01- 84 * and the methods of L. Doroshkevich [10], we can conclude that the approaches to determining the transverse force bearing capacity differ substantially from one another and have principled differences in the calculation methodology. The result of this was the discrepancy between the different methods of calculation.

In our opinion, it is necessary to conduct experimental research of reinforced concrete elements, and to compare them with the calculation method, which will take into account all components of the stressed state of construction, because today the methods of the existing normative documents create a significant reassessment of the bearing capacity.

Key words

bearing capacity, advanced-section reinforced concrete beam

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