SU1268691A1 - Reinforcement member - Google Patents

Abstract

This invention relates to the field of construction. The purpose of the invention is to increase the degree of reduction of structures made of low-modulus materials. The reinforcement element contains the reinforcement 1, one end of which is fixed in the pipe 2 with a stop flange 3 and a relaxation compensator. The relaxation compensator is made in the form of successively installed bodies 6 and 7 of rolling, which armature armatures 1. At the outlet of pipe 2, additional rolling bodies 11 are installed, which interact with reinforcement 1. When the forces in the reinforcement change, the relaxation compensator compensates for voltage losses by additional tension fittings. 1 hp f-ly, 6 ill. (J} l / .J

Description

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The invention relates to reinforcing elements intended for use in prestressed building structures.

The aim of the invention is to increase the degree of reduction of structures of low-modulus materials.

FIG. 1 shows a reinforcing element with a one-sided arrangement of the relaxation compensator, general view; in fig. 2 - the same, with a two-way arrangement of relaxation compensators; in fig. 3 shows section A-A in FIG. I (relaxation compensator for single reinforcement); in fig. 4 - the same for double reinforcement; in fig. 5 is a section BB in FIG. four; in fig. 6 shows a variant of a spring-loaded configuration of an intermediate rolling body of a relaxation compensator for a single armature.

The reinforcement element contains reinforcement 1, one end of which is fixed in pipe 2 with a stop flange 3, and the other is attached to the anchor 4. The stop flange 3 and the anchor 4 cover the ends of the building structure 5. Instead of the anchor 4, the other end of the reinforcement can be fixed in the other pipe 2

In the cavity of the pipe 2 is placed a relaxation compensator, made in the form of successively installed bodies 6 and 7 of rolling, which armature 1 bends around. The body 6 of rolling is fixed elastically through springs 8, the intermediate body 7 of rolling can be fixed without elastic draft (Fig. 3) or elastically by means of a composite spring 9 (Fig. 6). When securing the rolling body 7 without elastic precipitation, it can be equipped with a displacement device, for example a screw (not shown), to change the curvature of the flexure of a single reinforcement in the relaxation compensator. It is also possible to perform a relaxation compensator without an intermediate rolling body 7.

In the reinforcement element with double reinforcement (Fig. 4), the rolling body 6 is fixed in the pipe 2 by means of a snug catch 10 (Fig. 5), which fixes the rolling body 6 at the required distance between itself and relative to the walls of the pipe 2. To reduce losses friction at the exit of the pipe 2, additional rolling bodies 11 interacting with the reinforcement are installed.

The assembly of the reinforcing element is as follows.

The end of the reinforcement 1 is inserted into the pipe 2 around the rolling bodies 6 and 7 and fixed to the support flange 4, the other end of the reinforcement is fixed in the anchor 4 or in another pipe 2. Then the reinforcement I with the pipe 2 and the anchor 4 at the ends or with the pipes 2 at both ends, they are fixed in the building construction 5.

. The reinforcement element works as follows.

While maintaining the prestress in the building structure 5, for example in a beam, tension is applied

fittings 1 jack connected to the pipe 2 reinforcing element. When tensioning the reinforcement 1, its curvilinearly filled end section in the pipe 2 tends to stretch into a straight line, this is opposed by the bodies 6 and 7 of the relaxation compensator, which have a certain rigidity. With the slightest change in the forces in the reinforcement from creep and relaxation, the material of the construction of the relaxation compensator compensates for the voltage losses through the additional tension of the reinforcement. If it is necessary to adjust the degree of pre-stress in the reinforcement, it is possible to move the rolling body 7 across the reinforcement 1.

Thus, the tension reinforcement 1 will be constantly acted upon by the reactive force across the relaxation effects in the construction material 5. The transfer of the reactive reduction forces to the building construction 5 is provided by the end face of the pipe 2 and the stop flange 3 installed on its other end.

The invention makes it possible to increase the degree of reduction of structures made of low-modulus materials, for example, wood, polymerbeton, by compensating for the deformations shortening the pre-stretched armature from creep, cushioning and relaxation of the costruc- tion material.

Claims (2)

1. A reinforcing element containing reinforcement, at least one end of which is fixed in a pipe with a relaxation compensator installed in its cavity, characterized in that, in order to increase the degree of structural reduction of low-modulus materials, the compensator relaxation is made in the form of spring-loaded rolling elements, successively installed in the pipe along it, which bends around the end of the reinforcement. 2. The element according to claim 1, characterized in that, in order to reduce friction losses, it is equipped with additional rolling bodies installed at the outlet of the pipe and interacting with the armature.