Visnyk LNAU: Architecture and Farm Building 2021 №22: 62-68
INVESTIGATION OF PHYSICAL AND MECHANICAL CHARACTERISTICS OF THE STRUCTURES OF ARCH SYSTEMS OF COATING MADE OF HIGH-STRENGTH FAST-SETTING CONCRETE IN THE PROTECTING CONSTRUCTION OF DEFENSE
B. Karavan, PhD student
ORCID ID: 0000-0002-0499-7544
National University of Water and Environmental Engineering
https://doi.org/10.31734/architecture2021.22.062
Annotation
The results of the most famous experimental-theoretical researches described in open literature sources are studied and analyzed.
Theoretical and experimental researches of the work of two-hinged reinforced concrete arches are developed.
A static analysis of the convergence of experimental and theoretical data in the testing of concrete samples of cubes and prisms for compression and tension is performed.
The characteristic and calculated values of compressive and tensile strength of high-strength fast-setting concretes and their deformable characteristics are established.
The main geometric dimensions and calculated reinforcement for future prototypes of arched structures according to the current norms of calculations of concrete structures, which will be made of high-strength fast-setting concrete based on the previously accepted unit load, are selected.
Samples of concrete cubes and compression prisms, as well as tensile concrete prisms were manufactured and tested in a specialized laboratory to establish the basic physical and mechanical characteristics of high-strength concrete.
Mechanical state diagrams for experimental concretes are constructed.
The scope of future experimental research has been determined. Also, all materials and drawings have been prepared basing on the calculations according to the current norms of Ukraine in order to be able in the near future to start making prototypes of arched pavement structures, which will in turn be tested for static and dynamic loads.
The installation that allows testing prototypes of arched structures for dynamic loading is personally improved (upgraded) by the author of the article.
Key words
high-strength fast-setting concrete, diagrams, arched structures of the coating, stress-strain state
Full text
Link
- Babich Y., Karavan V., Filipchuk S., Sobczak-Piastka J. General requirements for materials of fortification protective structures, AIP Conference Proceedings 2077, 020004, 2019. URL: https://orcid.org/0000-0002-8261-692X.
- Babich Y., Karavan V., Filipchuk S., Sobczak-Piastka J. Research of basic mechanical and deformative properties of high-strength fast-hardening concretes, AIP Conference Proceedings 2077, 020003, 2019. URL: https://orcid.org/0000-0002-8261-692X.
- DBN V.2.6-98:2009 Design of buildings and constructions. Concrete and reinforced constructions. Main fundamentals.
- DSTU B V.2.7-43-96. Heavy concrete. Technical conditions.
- DSTU B V.2.6-156:2010. Design of building and constructions. Concrete and reinformced constructions of heacy concrete. Rules of projecting.
- DSTU B V.2,7-217:2009. Methods to measure the prism strength, elasticity module and Poison's ratio.
- Sobczak-Piąstka J., Babich Y., Karavan V., Filipchuk S., Nalepa O. Research of deform-ative properties of concrete taking into account the descend-ing branch of defor-mation, WMCAUS 2020, IOP Publishing, IOP Conf. Series: materials Science and Engineering 960 (2020) 032057.
