RU2202026C2 - Reinforced concrete building frame - Google Patents

Abstract

FIELD: construction industry, erection of buildings of various assignment, predominantly residential and civic buildings. SUBSTANCE: reinforced concrete building frame comprises columns of extreme rows and of columns of internal rows of rectangular section with relation of side not less than 1: 3. Columns are fitted with grooves which accommodate butts of collar beams of extreme and internal rows. Columns of extreme rows are installed with bigger side of section along length of building and columns of internal rows are set perpendicular to length of building. Collar beams of extreme rows enter grooves of extreme columns and have width equal to or larger than doubled thickness of column. Collar beams to support plates of floor are installed in grooves of columns beneath collar beams of internal rows by thickness of collar beam and collar beams of internal rows are provided with flanges cut along longer sides of collar beams through half of their thickness. EFFECT: reduced usage of materials and labor input thanks to more complete utilization of strength properties of fitting and concrete. 5 dwg

Description

 The invention relates to the field of construction of buildings for various purposes, mainly buildings for housing and civil engineering.

 Known frame, which consists of prefabricated or monolithic columns of rectangular cross-section and hollow core slabs, combined into a single system of monolithic reinforced concrete bearing connecting beams. The crossbars in mutually perpendicular directions are passed through the columns and are rigidly connected with the latter in these nodes. For this purpose, through openings with complete exposure of the working reinforcement in these places in the prefabricated columns to the height of the crossbars at the floor levels are performed. Supporting multi-hollow slabs on load-bearing crossbars is provided by means of concrete dowels formed in cavities open at the ends of the plates to a depth of 100 ± 20 mm when laying monolithic concrete crossbars. In addition, at the ends of multi-hollow plates with a length of 150 ± 10 mm, releases of their working reinforcement are provided, which are placed in monolithic load-bearing crossbars. Bearing crossbars can be of rectangular or T-section with an upper shelf located in the floor screed. The installation of the frame is carried out using a rack-mount mounting technological equipment, placed on the floor erected below (1).

 The disadvantages of this solution are the use of monolithic load-bearing structures, requiring additional energy costs during the construction in the autumn-winter period, in addition, it is necessary to use temporarily supporting floors of metal structures (installation and technological equipment), which make the construction of the frame uneconomical.

 The prototype of the claimed technical solution is the reinforced concrete frame of the Bozylev building, with interfloor ceilings without ribs protruding from the plane of the ceilings, including square columns, flat longitudinal and transverse crossbars, the last of which are made with shelves for supporting longitudinal crossbars and floor slabs, and the branches of transverse crossbars, enclosing columns are equipped with limiters of flexibility located along the longitudinal axes of the building. Cross beams are made integral, columns have grooves for supporting the fork ends of transverse beams, and flexibility limiters are made in the form of reinforced support beams made of monolithic concrete in a key gap formed by the end surfaces of parts of the transverse and longitudinal beams and the column, and the reinforcement of the support beam is rigidly connected to the reinforcement columns or passed through the column (2).

 The disadvantages of the prototype are the high material consumption and the complexity of the construction due to the need for labor-intensive operations to weld rebar releases to ensure continuity at the interface points of flat crossbars, as well as the use of monolithic load-bearing structures that require additional energy costs during construction during the winter season.

 The objective of the proposed frame is to reduce the material consumption and the complexity of construction due to a more complete use of the strength properties of reinforcement and concrete, as well as providing the possibility of installing walls of light materials with a high coefficient of thermal resistance, based on the design of each floor. The task is achieved in that in the reinforced concrete frame of the building, including the columns of the extreme and inner rows, equipped with grooves for installing the ends of the flat rectangular crossbars, while the crossbars of the inner rows are equipped with shelves for supporting the floor slabs, the columns are made in a rectangular section with an aspect ratio of at least 1: 3, and the columns of the outermost rows are installed with the larger section along the length of the building, and the columns of the inner rows are perpendicular to the length of the building, while the crossbars of the outermost rows are made with a width of equal to or greater than double the width of the column, and are installed in the grooves of the columns of the extreme rows with or without displacement, and the crossbars of the extreme rows are installed below the crossbars of the inner rows by the thickness of the crossbar. Thanks to the claimed solution, a reduction in labor intensity, reduction of construction time, energy costs and metal consumption is achieved due to the exclusion of time-consuming operations on the device scaffolding (installation of metal technological equipment), the implementation of critical structures from cast concrete, as well as through a more complete use of the strength properties of the reinforcement and concrete in connection with the use of their grades of increased strength and rational sections of the elements.

 The claimed solution is illustrated by drawings, where figure 1 shows a fragment of a building frame, top view; figure 2 is a fragment of the frame with slabs, top view; figure 3 is a section aa in figure 2; in FIG. 4 is a perspective view of a junction of a column of an inner row with crossbars of an inner row; in FIG. 5 is an axonometric view of the connection of the column of the extreme row with the crossbars of the extreme row.

 The reinforced concrete frame of the building consists of columns 1 of the outermost rows and columns of 2 inner rows of rectangular cross section with an aspect ratio of at least 1: 3. The columns are provided with grooves 3 for installing flat rectangular crossbars of 4 extreme rows and flat rectangular crossbars of 5 inner rows. Columns 1 of the outermost rows are installed by the larger section along the length of the building, and columns 2 of the inner rows are perpendicular to the length of the building. The crossbars 5 of the inner rows have protrusions 6 in the end parts, which allow the crossbars to be supported half the thickness of the column. To support the floor slabs 7, the crossbars 5 of the inner rows are equipped with shelves 8 made on the long sides of the crossbars to half their thickness. The crossbars of the 4 extreme rows are rectangular, are included in the grooves of 3 columns of the 1 extreme rows and are made with a width equal to or greater than twice the thickness of the column. The crossbars 4 can be placed in relation to the columns 1 of the extreme rows, as shown in figure 3, or with an offset within the width of the crossbar. To support the plates on the upper plane, the crossbars 4 are installed in the grooves of 3 columns 1 below the crossbars 5 of the inner rows to the thickness of the crossbar. Overlapping plates 7 are laid on the shelves of the crossbars 5 on one side and on the upper plane of the crossbars 4 on the other side. In places of contact with the columns 1 in the plates 7, a groove 9 is made for setting the columns. In places of support on the columns 2, the crossbars 5 are interconnected by connecting parts 10 of round or sheet steel.

 Mounting the frame is as follows.

 After installing the columns of the inner and outer rows, the crossbars 4 and 5 are inserted into the grooves 3, moreover, the crossbars 5 of the inner rows are supported by the columns 2 of the inner rows using the projections 6. After installation, the crossbars are connected to each other by welding with connecting parts 10 made of round or sheet steel, after which the grooves of 3 columns are sealed with cast concrete. Floor slabs are laid on the crossbars of the inner and outer rows, and the plates are supported on the upper plane of the crossbars of the 4 extreme rows and the shelf 8 of the crossbars of the 5 inner rows, for which one of the ends of the slabs is trimmed to half the thickness of the slab. The plates laid at the columns are connected to the crossbars of the extreme and inner rows by welding with metal fittings.

 The claimed technical solution will reduce the consumption of materials and the complexity of construction, reduce construction time, as well as provide the possibility of installing walls made of light materials with a high coefficient of thermal resistance, based on the design of each floor.

Sources of information
1. A.I. Mordich, R.I. Vigdorchik, V.N. Belevich, Yu.I. Ivashchenko "Unified open frame system of buildings with flat ceilings, series B1.020.1 - 7", (Architecture and Construction 6, 1999, Minsk).

 2. Patent of the Republic of Belarus BY 2772C1, cl. E 04 B 1/18 dated 06/30/1999 "Reinforced concrete frame of the Bozylev building."

Claims (1)

 The reinforced concrete frame of the building, including the columns of the outer and inner rows, provided with grooves for installing the ends of the flat rectangular crossbars, while the crossbars of the inner rows are made with shelves for supporting the floor slabs, characterized in that the columns are made of rectangular section with an aspect ratio of at least 1: 3, moreover, the columns of the outermost rows are installed with the larger section along the length of the building, and the columns of the inner rows are perpendicular to the length of the building, while the crossbars of the outermost rows are made with a width equal to or greater than twice the thickness of the column, and are installed in the grooves of the columns of the extreme rows with offset relative to the columns or without it, and the crossbars of the extreme rows are installed below the crossbars of the inner rows by the thickness of the crossbar.

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