RU144861U1 - REINFORCED CONCRETE FRAME OF SEISMIC RESISTANT MULTI-STOREY BUILDING - Google Patents

Abstract

1. The reinforced concrete frame of an earthquake-resistant multi-storey building, characterized in that it is a monolithic reinforced concrete structure of columns and crossbars located at right angles to each other, with each column consisting of an internal reinforced concrete core equipped with sheet metal embedded parts along the edges, and external steel box shell, which is installed with a gap and parallel to the embedded parts, in the specified gap steel shear ties are installed having an angular equal-shelf section each bolt consists of a middle reinforced concrete element with embedded parts along the upper and lower belts of sheet metal, and from the lower and upper waist steel elements, which are installed with a gap and parallel to the embedded parts, in the specified gap steel shear bonds having angular equilateral section. 2. Reinforced concrete frame according to claim 1, characterized in that the steel shear bonds of each crossbar are installed parallel to each other. 3. Reinforced concrete frame according to claim 1, characterized in that the steel shear bonds of each column are installed perpendicular to the axis of the column. Reinforced concrete frame according to claim 1, characterized in that the steel shear ties of the column are installed horizontally. 5. Reinforced concrete frame according to claim 1, characterized in that the box-shaped shells and embedded parts of each column, as well as embedded parts and waist steel elements of each crossbar, are equipped with a system of holes with the same pitch, which are used to establish steel shear bonds. 6. Reinforced concrete frame according to claim 1, characterized in that each column has a transverse

Description

The utility model relates to the field of construction, namely, to reinforced concrete frames of earthquake-resistant multi-storey buildings, and can be used for the construction of multi-storey buildings with reinforced concrete frame, perceiving horizontal seismic and wind loads.

The prior art various options for reinforced concrete frames of buildings.

From the document CN 101481929 A, a reinforced concrete frame is known which is made with transverse stiffeners.

The disadvantage of this frame when exposed to horizontal loads is the predominant influence of bending moments that determine the strength and rigidity of the frame.

From the document CN 103233509 A a reinforced concrete frame is known, consisting of columns and beams, which are made in the form of a reinforced concrete core with oblique stiffeners.

The disadvantage of this frame is also low rigidity and strength.

The closest analogue of the claimed utility model is document KR 101311207 B1, of which the reinforced concrete frame of multi-storey buildings is known, which has columns and beams that are made in the form of a concrete core and a box-shaped steel casing.

The disadvantage of the closest analogue is the low rigidity and structural strength.

Thus, the technical result, to achieve which the claimed utility model is aimed, is to increase the rigidity and strength of the frame, and, accordingly, increase the seismic resistance of the building as a whole.

The claimed technical result is fully achieved by a set of features of an independent paragraph of the claimed formula of the utility model.

The proposed frame design changes its mode of operation: bending moments are practically eliminated from the force factors determining the strength and rigidity of the frame. Frame elements - crossbars and columns work mainly on transverse, longitudinal and shear forces, that is, mainly on compression-tension.

The reinforced concrete frame of an earthquake-resistant multi-storey building is a monolithic reinforced concrete structure of columns and crossbars located at right angles to each other. Each column consists of an internal reinforced concrete core, equipped along the edges with embedded parts from sheet metal, and an external steel box shell, which is installed with a gap and parallel to the embedded parts. In this gap, steel shear bonds are installed having an angular equal-shelf section. Each crossbar consists of a middle reinforced concrete element with embedded parts along the upper and lower zones of sheet metal, and from the lower and upper zone steel elements, which are installed with a gap and parallel to the embedded parts. In this gap, steel shear bonds are installed having an angular equal-shelf section.

Steel shear bonds of each crossbar are installed parallel to each other.

Steel shear bonds of each column are mounted perpendicular to the axis of the column.

Steel shear bonds of each column are mounted horizontally.

The box-shaped shells and embedded parts of each column, as well as embedded parts and belt steel elements of each crossbar, are equipped with a system of holes with the same pitch, which are used to establish steel shear bonds.

Each column has a rectangle in cross section, in particular a square.

Further, in more detail, the claimed utility model is illustrated by drawings, in which:

In FIG. 1 shows a schematic plan of the frame (top view);

In FIG. 2 is a section Α-A in FIG. one;

In FIG. 3 - fragment “G” in FIG. 2;

In FIG. 4 - fragment “D” in FIG. 2;

In FIG. 5 - node "A" in FIG. 2;

In FIG. 6 - node "B" in FIG. 2;

In FIG. 7 - node "B" in FIG. 2;

In FIG. 8 is a section 1-1 along the crossbar in FIG. 2;

In FIG. 9 is a section 2-2 along the column of FIG. 2; four.

In FIG. 10 - Node "E" (bolt) in FIG. 3-7;

In FIG. 11 - Node “G” (column) in FIG. 3-7;

In FIG. 12 - steel shear bond separately;

In FIG. 13 - structural elements from sheet metal with holes.

The claimed reinforced concrete frame of an earthquake-resistant multi-storey building includes interconnected three-element load-bearing structures: columns and crossbars.

Each reinforced concrete column consists of an inner reinforced concrete core (1), equipped along the edges with embedded parts (2) of sheet metal, and an external steel box casing (3), which is installed with a gap and parallel to the embedded parts (2). In this gap, steel shear bonds (4) are installed having an angular equal-shelf section. Moreover, the steel connection (4) of the column shear is installed perpendicular to the axis of the column.

Each reinforced concrete crossbar consists of a middle reinforced concrete element (5) with embedded parts (6) along the upper and lower zones of sheet metal, from the lower and upper zone steel elements (7), which are installed with a gap and parallel to the embedded parts (6). In this gap, steel shear bonds (8) are installed having an angular equal-shelf section.

Steel ties (8) of the crossbar shear are installed parallel to each other.

Box-shaped shells (3) and embedded parts (2) of each column, as well as embedded parts (6) and waist steel elements (7) of each crossbar, are equipped with a system of holes (9) with the same pitch, which are used to establish steel shear ties (4 and 8).

Cohesion of steel ties (4) of shear with embedded parts (2) and with a box-like shell (3) of each column is performed by welding with metal fusion.

The jointing of steel ties (8) of shear with embedded parts (6) and with belt steel elements (7) of each crossbar is performed by welding with metal fusion.

The inner reinforced concrete core of the columns and the middle reinforced concrete elements of the crossbars represent a single monolithic main part of the frame.

The entire frame structure is installed on the foundation in any known manner and in any sequence.

This embodiment provides greater rigidity, allowing the structure to withstand heavy loads.

Such a constructive solution of the elements of the reinforced concrete frame (columns and crossbars) of a multi-story building is based on the effect of replacing the bending moment with transverse and shear forces. Bending moments, insignificant in size, are localized mainly within the pitch of steel shear bonds, and do not accumulate along the length of structural elements of the reinforced concrete frame.

The parameters of the limiting states of the reinforced concrete frameworks of buildings are regulated by optimizing the gap between the embedded parts and the box-like shell of each column, and by optimizing the gap between the embedded parts and the belt steel elements of each crossbar, as well as the pitch of the steel shear ties in the columns and crossbars.

The bearing capacity of columns and crossbars of a reinforced concrete frame is determined by the maximum edge stresses and the maximum tangential stresses in the steel shear bonds.

The optimal stiffness of steel shear bonds will be such that the load-bearing capacity of the columns and crossbars is the same according to these two criteria.

Thus, the implementation of the reinforced concrete frame of the above construction provides an increase in the rigidity of the building.

Claims (7)

1. The reinforced concrete frame of an earthquake-resistant multi-storey building, characterized in that it is a monolithic reinforced concrete structure of columns and crossbars located at right angles to each other, with each column consisting of an internal reinforced concrete core equipped with sheet metal embedded parts along the edges, and external steel box shell, which is installed with a gap and parallel to the embedded parts, in the specified gap steel shear ties are installed having an angular equal-shelf section each bolt consists of a middle reinforced concrete element with embedded parts along the upper and lower belts of sheet metal, and from the lower and upper waist steel elements, which are installed with a gap and parallel to the embedded parts, in the specified gap steel shear bonds having angular equilateral section. 2. The reinforced concrete frame according to claim 1, characterized in that the steel shear bonds of each crossbar are installed parallel to each other. 3. The reinforced concrete frame according to claim 1, characterized in that the steel shear bonds of each column are installed perpendicular to the axis of the column. 4. Reinforced concrete frame according to claim 1, characterized in that the steel shear connection columns are installed horizontally. 5. The reinforced concrete frame according to claim 1, characterized in that the box-shaped shells and embedded parts of each column, as well as embedded parts and waist steel elements of each crossbar, are equipped with a system of holes with the same pitch, which are used to establish steel shear ties. 6. The reinforced concrete frame according to claim 1, characterized in that each column has a rectangle in cross section. 7. Reinforced concrete frame according to claim 6, characterized in that each column has a square in cross section