SU1680912A1 - Method for strengthening of building structures - Google Patents

Abstract

The invention relates to construction and can be used to strengthen and repair structures and butt joints of structural elements. The aim of the invention is to simplify the amplification process. The method of reinforcement includes making the first hole perpendicular to the surface of the reinforced structure, installing the U-shaped rod by a bend, located in the initial position at an obtuse angle to the middle part of the rod, into this hole filled with adhesive, making the second hole located perpendicular to the surface of the structure at the place of contact of the other limb, located in the initial position at a right angle, filling it with an adhesive composition. After hardening, it also creates a stress by driving the bend, which is in the initial position at a right angle to the second hole, which is preliminarily filled with an adhesive composition. 18 il. w Ё

Description

The invention relates to construction and can be used to strengthen and repair structures and butt joints of structural elements.

The purpose of the invention is to simplify the amplification process.

Fig. 1 shows a beam with weights located in the zone of action of the bending moment and in the area where the shear force prevails; figure 2 - section aa in figure 1; Fig. 3 shows a centrally compressed element with weights oriented in the direction of maximum transverse deformations; figure 4 - section bb in fig.Z; Fig. 5 shows an eccentrically compressed element with a large eccentricity of longitudinal force with weights located in the stretched zone; figure 6 is a section bb In figure 5; FIG. 7 shows floor slabs with mounts located on the supports of adjacent plates; Fig.8 is a section of the GT in Fig.7; Figures 9-11 include sections of building structures damaged by cracks, with weights (arrows indicate the direction of movements separated by a crack of parts of the structure); Fig. 12 shows the damaged external enclosing structures of residential buildings with reinforcement loads; in fig. 13 - U-shaped t, initial position; 14 to 17 show successive operations for performing the gain; in fig. 18 - U-shaped t, working position.

The device for reinforcing building structures is the traction 1 of the reinforcing rods installed in structure 2 damaged by a crack 3. The middle part of each rod 1 is located directly on the surface or in a furrow arranged on the surface of the structure. The depth of the furrow is chosen from the design considerations: based on the size of the protective layer for pre-cooling

O CO O

Yu

hO

traction from corrosion, installation of shells at different depths at their intersection, ensuring the perception of the middle part of the traction effort, non-parallel to its axis.

T f 1 in the initial position has dimensions a, b, with corresponding to the limb 4, located at a right angle to the middle part of the thrust 1, middle part of the thrust 1 and bend 5, located at an obtuse angle to the middle part of the thrust. Angle a, at which the limb is bent 5 relative to the perpendicular arrangement to the middle part of the thrust 1, corresponds to 90 ° + arct & g and

The length c ensures the fixation of the bend 5 in the hole 6. The bends 4, 5, the rod 1 are placed in the holes 6, 7, filled with the adhesive composition 8. The middle part of the rod 1 is placed in the groove 9, filled with mortar. The distance d between the inner edges of the holes 6.7 determines the tension force of the middle part of the thrust equal to the value (m -1) E without taking into account losses.

The method for enhancing building construction includes the following operations.

In construction 2, a hole 6 and a groove 9 are arranged with a perforator, the mating of the surfaces of the groove 9 and the hole b is processed along a radius equal to the bending radius of the rebar,

Hole b is filled with an adhesive compound 8 and a 5-inch-long limb is inserted into it. After hardening of the adhesive composition 8, the middle part of the pull 1 is straightened with a hand in the direction of the arrow 10. On the surface of the structure 3 there is a point at which the surface touches the limb 4. The distance between the marked point and the first hole 6 d will be the distance

between the inner edges of the opening 6, 7 in construction 3.

The bend 4 by turning the horizontal part of the pull 1 pulls out of the groove 9 on the surface of the structure 3, where it is fixed due to the elastic properties of the rebar, after which the second hole 7 and the hole surface mate with the surface of the groove 9 along the radius. The end of the limb 4 is placed in the upper part of the hole filled with adhesive.

With blows in the direction of the arrow 11, the end of the limb 4 enters the hole 7. At the moment of insertion of the limb 4 into the hole of 7 tons and 1, it starts to work, and the middle part of the joint begins to extend and the crack 3 is closed.

0

five

0

five

0

50

50

five

Tj 1 increases to its maximum when it is placed in the design position and the crack closes. Then the furrow 9 is sealed with mortar.

When reinforcing slabs 12, floors 1 are installed along the working span on the supports of adjacent plates 12, along the direction of mutual displacements of the side faces of adjacent plates under load. After installation, the webs on the support plates 12 work as continuous. The cross section and the tension force are determined by the required reduction in the transit time, and their length is determined from the plot of moments.

With a fracture 13 of normal fracture or tearing, the threads 14 are oriented perpendicular to its direction, along the direction of the main tensile stresses (Fig.9).

With cracks 15, the longitudinal shear gi 16 are oriented along the direction of the development of the crack 15, possibly close to the direction of tangential stresses (Fig. 10).

With cracks 17 formed by alternating, for example, thermal deformations (stresses), the straps 18 are installed in intersecting directions (Fig. 11).

With normal cracks 19 in the cross-sectional part of the outer wall panel 20 (as a result of insufficient reinforcement of the stretched zone of the lintel), weights 21 are installed. With inclined cracks 24 in the entrance corners of the opening of the panels 20 (as a result of the absence of additional reinforcement in the stress concentration zones), weights 25 are established. With inclined cracks 26 in the panels of the 20 outer walls (as a result, uniform precipitation of the base), set 27. When the joints 28 of the external wall panels are destroyed (as a result of the absence or destruction of the bond between the external wall panels due to corrosion), the links 29 are installed in intersecting directions to perceive shear forces (Fig. 12).

Claims (1)

The invention of the method of strengthening of building structures, including making holes in the reinforced structure with a distance between them larger than the size of the middle part of the U-discharge, installing a pull in the hole and creating a voltage in it, characterized in that in order to simplify the reinforcement process, first make the first hole, the axis of which is perpendicular to the surface of the reinforced structure, and fill it with an adhesive composition, then install a U-shaped limb in the hole, which is in the initial position with a subdue angle to its middle part, Thereafter, a second hole is made, the axis of which is perpendicular to the surface of the reinforced structure, at the point of contact of another bend, which is in the initial position at a right angle to its middle part and after the adhesive has hardened. the composition in the first hole is stressed in the same bending drive of the bend, located at a right angle, into the second hole, previously filled with adhesive composition. N munwiiniiiiiiiuiiuutmuiim / Aa / 5L one I / BUT 1 & n J.5 B Fig. 3 Fy N BL J AT FIG. five N O Digital C) axis - / i -g 4Fig .6 / X. // # gd V // -V / 7. IB & FIG. 18 I z l + si d and 01 II u SI L f Zt6089L / SI Mf tj t / u 2160891 FIG. 17 figm