RU79908U1 - Steel and concrete beam (options) - Google Patents

Steel and concrete beam (options) Download PDF

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Publication number
RU79908U1
RU79908U1 RU2008130589/22U RU2008130589U RU79908U1 RU 79908 U1 RU79908 U1 RU 79908U1 RU 2008130589/22 U RU2008130589/22 U RU 2008130589/22U RU 2008130589 U RU2008130589 U RU 2008130589U RU 79908 U1 RU79908 U1 RU 79908U1
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Russia
Prior art keywords
steel
concrete
reinforced concrete
sheets
construction
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RU2008130589/22U
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Russian (ru)
Inventor
Дмитрий Анатольевич Пекин
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Дмитрий Анатольевич Пекин
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Priority to RU2008130589/22U priority Critical patent/RU79908U1/en
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Abstract

The utility model relates to construction, namely to beams of floors or coatings of buildings and structures of various functional purposes and is aimed at increasing the bearing capacity, reliability, speed and manufacturability of the construction, reducing the consumption of steel and concrete. The specified technical result is achieved by the fact that in the proposed structural solution of the steel-reinforced concrete beam, the joint work of concrete, prestressed reinforcement, steel sheets forming a box beam is realized, in the cavity of which the prestressed reinforcement is then installed in the design position and concreted. Furthermore, in addition to steel sheets, shaped rolled or welded profiles can be used. A steel box-shaped steel beam is manufactured at the metal construction plant, consisting of horizontal sheets, vertical sheets and / or shaped elements connected by welding, with pre-made holes for the passage of prestressed reinforcement and subsequent concreting. Further, at the factory or directly at the construction site, pre-tensioned fittings are installed in pre-made holes, which is a certain number of rods or ropes coated with grease, located inside plastic pipes of a larger diameter and not having adhesion to concrete, which allows the reinforcement to be tensioned as supports (steel box-section beam) and concrete (after concreting the beam). The tension can be performed in one or several stages, depending on the assembly sequence and the application of loads. Concreting is carried out with fine-grained concrete or polymer concrete with maximum mixture mobility through pre-made holes in the upper beam shelf. Pre-stressed steel-reinforced concrete beam can be performed as a single-span articulated and multi-span continuous. A fundamentally new structural solution for steel-reinforced concrete beams is based on the joint work of steel and reinforced concrete structures described above and allows using the positive qualities of these building materials with maximum benefit. 4 ill.

Description

The utility model relates to construction, namely to beams of floors or coatings of buildings and structures of various functional purposes.
Known are traditional constructive solutions of prestressed reinforced concrete beams, trusses, arches, set forth in the book: “Baykov V.N., Sigalov E.E. Reinforced concrete structures. General course. Textbook for high schools. Ed. 3rd corrected. M., Stroyizdat, 1978, 767 pp. "On pages 489-509 of Fig. XIII.33-XIII.43.
The disadvantages of such structures for the option of erecting buildings and structures made of precast concrete are: limitations associated with the typical dimensions of structural elements (roof beams and ceilings, trusses, roof structures, arches); significant dead weight of structural elements; lack of manufacturers of some structural elements on the construction market. For the option of erecting buildings and structures from monolithic reinforced concrete, the disadvantages are associated with: the complexity of the manufacture and installation of formwork; the impossibility of high-quality concreting of supporting sections of structures in connection with a glut of reinforcement.
Also known are the traditional structural solutions of conventional and prestressed steel beams, trusses, arches, set forth in the book: “Metal structures. In 3 T.T. 2. Steel structures of buildings and structures. (Designer Handbook) / Under the general. ed. V.V. Kuznetsova (Central Research InstituteProjectstalconstruction named after N.P. Melnikov) - M.: Publishing House ASV, 1998, 512 pp., On pages 86-93, Fig. 6.1-6.7, on pages 150-159, Fig. .7.1-7.7, on pages 248-263 fig. 12.1-12.14.
The disadvantages of such structures are: lower overall stability of the beams, due to the lack of concrete in the cross section and the inappropriateness of developing the section from the plane; less static design uncertainty; lack of collaboration between steel and reinforced concrete structural elements, which reduces the reliability of the structure as a whole; the need to absorb compressive forces with steel elements, not concrete; the inappropriateness of the use of certain designs for floors and coatings with high loads.
The closest in technical essence is the constructive solution set forth in the book: “Baykov V.N., Sigalov E.E. Reinforced concrete structures. General course. Textbook for high schools. Ed. 3rd corrected. M., Stroyizdat, 1978, 767 pp. ”On pages 171-174 of Fig. XIII.17-XIII.18. In this design solution, a reinforced concrete beam consists of concrete, bar reinforcement and supporting (rigid) reinforcement in the form of a rolled or welded steel beam located inside the section.
The disadvantages of such a structural solution for reinforced concrete beams are: the complexity of the installation and subsequent permutation of the removable formwork; increase in the duration of construction, the complexity of high-quality concreting of the structure; there is no volumetric stress-strain state of concrete.
The utility model is aimed at increasing the bearing capacity, reliability, speed and manufacturability of the construction, reducing the consumption of steel and concrete of floor beams or coatings of buildings and structures.
This is achieved by the fact that in the proposed structural solution of steel-reinforced concrete beam, the joint work of concrete
reinforcement, steel sheets forming a box beam, in the cavity of which then tensioned reinforcement is installed in the design position and concreted.
Furthermore, in addition to steel sheets, shaped rolled or welded profiles can be used.
A steel box-shaped steel beam is manufactured at the metal construction plant, consisting of horizontal sheets, vertical sheets and / or shaped elements connected by welding, with pre-made holes for the passage of prestressed reinforcement and subsequent concreting. Then, at the factory or directly at the construction site, pre-tensioned fittings are installed in pre-made holes, which is a certain number of rods or ropes coated with grease, located inside plastic pipes of a larger diameter and not having adhesion to concrete, which allows the reinforcement to be tensioned as supports (steel box-section beam) and concrete (after concreting the beam). The tension can be performed in one or several stages, depending on the assembly sequence and the application of loads. Concreting is carried out with fine-grained concrete or polymer concrete with maximum mixture mobility through pre-made holes in the upper beam shelf. Pre-stressed steel-reinforced concrete beam can be performed as a single-span articulated and multi-span continuous.
A fundamentally new structural solution for steel-reinforced concrete beams is based on the joint work of steel and reinforced concrete structures described above and allows using the positive qualities of these building materials with maximum benefit.
An increase in the bearing capacity of a prestressed steel-reinforced concrete beam is achieved by the fact that the horizontal steel sheet is located below the concrete, thereby increasing the shoulder of the inner pair, using high-strength tensile reinforcement, which allows you to adjust the internal forces, also several vertical steel sheets are present in the cross section, which significantly increases the geometric characteristics of the whole cross section of the beam. The cross-sectional area of the horizontal sheet can vary widely and significantly exceed the possible area of the longitudinal reinforcement placed in a traditional reinforced concrete beam, due to the limitations of the light distances between the reinforcement, dictated by the need to lay the concrete mixture. The possibility of brittle fracture of the compressed concrete zone is excluded due to cramped working conditions and volumetric stress-strain state. Significantly increases the compressive strength of concrete.
The increase in reliability is due to the fact that the mechanism of brittle destruction of concrete is excluded, the static indeterminacy of the structure is increased, the influence of factors associated with a violation of the manufacturing and installation technology at the construction site is reduced, as a result, instead of one reinforced concrete or steel beam, a prestressed reinforced concrete beam inside the box-shaped steel beam is obtained . Steel sheets cannot lose stability, as they are in the body of concrete. The deformability of the structure as a whole changes, and it begins to work viscously. Concrete begins to play a subordinate role, preventing steel sheets inside concrete from losing stability. It excludes the possibility of changing the design position of the prestressed reinforcement due to the installation in pre-made holes in steel sheets.

Claims (3)

1. Steel-reinforced concrete beam, including concrete, prestressed reinforcement, characterized in that it contains steel sheets forming a box-shaped beam, inside of which prestressed reinforcement and concrete are placed.
2. Steel-reinforced concrete beam, including concrete, prestressing reinforcement and shaped rolling or welded profiles, characterized in that it contains steel sheets and shaped rolling or welded profiles forming a box beam, inside of which prestressed reinforcement and concrete are placed.
3. Steel-reinforced concrete beam, including concrete and shaped rolled or welded profiles, characterized in that it contains steel sheets and shaped rolled or welded profiles, forming a box beam, inside of which concrete is placed.
Figure 00000001
RU2008130589/22U 2008-07-24 2008-07-24 Steel and concrete beam (options) RU79908U1 (en)

Priority Applications (1)

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RU2008130589/22U RU79908U1 (en) 2008-07-24 2008-07-24 Steel and concrete beam (options)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2008130589/22U RU79908U1 (en) 2008-07-24 2008-07-24 Steel and concrete beam (options)

Publications (1)

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RU79908U1 true RU79908U1 (en) 2009-01-20

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2507336C1 (en) * 2012-09-25 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Липецкий государственный технический университет" (ЛГТУ) Bridge reinforced concrete beam
RU2621247C1 (en) * 2016-04-12 2017-06-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel-concrete beam
RU172515U1 (en) * 2017-04-10 2017-07-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" КГАСУ Pre-stressed steel concrete beam
RU2627810C1 (en) * 2016-05-19 2017-08-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel concrete beam
RU174326U1 (en) * 2017-01-19 2017-10-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" КГАСУ Pre-stressed steel concrete beam
RU2641142C1 (en) * 2017-05-03 2018-01-16 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Long-dimensional pipe concrete element
RU176462U1 (en) * 2017-09-12 2018-01-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Multi-span carrier beam
RU2675002C1 (en) * 2018-02-21 2018-12-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Preliminary stress-bearing reinforced beam
RU2677188C1 (en) * 2018-02-26 2019-01-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Preliminary stress-bearing reinforced beam

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2507336C1 (en) * 2012-09-25 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Липецкий государственный технический университет" (ЛГТУ) Bridge reinforced concrete beam
RU2621247C1 (en) * 2016-04-12 2017-06-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel-concrete beam
RU2627810C1 (en) * 2016-05-19 2017-08-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel concrete beam
RU174326U1 (en) * 2017-01-19 2017-10-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" КГАСУ Pre-stressed steel concrete beam
RU172515U1 (en) * 2017-04-10 2017-07-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" КГАСУ Pre-stressed steel concrete beam
RU2641142C1 (en) * 2017-05-03 2018-01-16 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Long-dimensional pipe concrete element
RU176462U1 (en) * 2017-09-12 2018-01-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Multi-span carrier beam
RU2675002C1 (en) * 2018-02-21 2018-12-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Preliminary stress-bearing reinforced beam
RU2677188C1 (en) * 2018-02-26 2019-01-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Preliminary stress-bearing reinforced beam

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MM1K Utility model has become invalid (non-payment of fees)

Effective date: 20160725