CN216811108U - Reinforced structure for additionally arranging reinforced concrete columns on masonry wall - Google Patents

Abstract

The utility model discloses a reinforced structure of a masonry wall additionally provided with reinforced concrete columns, which consists of an original masonry wall body and newly increased concrete columns, wherein the newly increased concrete columns are arranged on two sides of a reinforced part of the original masonry wall body, stressed longitudinal bars are arranged in the newly increased concrete columns, and hoops are respectively bound on the peripheries of the stressed longitudinal bars; the two sides of the newly-added concrete column perpendicular to the original masonry wall are respectively provided with the tie bars, the tie bars penetrate through tie bar reserved holes in the reinforcing part of the original masonry wall, the original masonry wall and the newly-added concrete column form a whole through the tie bars, the advantage of large internal rigidity of the masonry wall is fully played, the defect of small external rigidity of the masonry wall is overcome, and the anti-seismic performance of the structure is greatly improved. The utility model can not damage the original wall structure, the stress member of the original wall structure can not be damaged, the support to the original structure is saved in the construction process, the construction cost is reduced, and the construction period is shortened.

Description

Reinforced structure for additionally arranging reinforced concrete columns on masonry wall

Technical Field

The utility model belongs to the technical field of earthquake-proof reinforcement of building structures, and particularly relates to a reinforced structure with a reinforced concrete column additionally arranged on a masonry wall.

Background

In recent decades, masonry structures have been widely used and become one of the main structural forms of the existing buildings in China. China belongs to a country with frequent earthquakes, the distribution range of earthquake regions is wide, and regions with the seismic fortification intensity of more than 7 degrees approximately occupy 1/3 of the territory area. Earthquake can make a large amount of masonry structure damage serious, takes place the part or wholly to collapse, causes huge life and property loss. Due to the reasons of environmental degradation, change of building use function, lack of maintenance and the like, masonry structures are seriously damaged in earthquake all the times, and therefore, the earthquake resistance of the masonry structures needs to be improved through structural reinforcement urgently. At present, aiming at masonry structure seismic reinforcement, reinforced concrete constructional column reinforcement is the most common reinforcement method, but the reinforcement method also has some problems. When the reinforced concrete columns are additionally arranged for reinforcing the masonry wall, a certain amount of chiseling is conducted on the masonry wall, and then the reinforced concrete columns are additionally arranged. One method is that a groove is chiseled outside the masonry wall, anchor bars are arranged in the masonry wall, and then reinforced concrete columns are poured to form a whole; the other method is to chisel the masonry wall through, form the jaw slot on both sides, then pour the additional reinforced concrete column. No matter which method is adopted, the masonry wall is required to be transformed, the stress of the original wall body is damaged, the stress of the original wall body is increased, and the structure can be damaged if the masonry wall is improperly supported.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reinforced structure for additionally arranging a reinforced concrete column on a masonry wall, and aims to solve the problems existing in the prior art that the masonry structure is reinforced by utilizing the reinforced concrete constructional column.

In order to realize the purpose, the utility model adopts the technical scheme that:

the utility model provides a reinforced concrete column's reinforced structure is add to brickwork wall, is equipped with the lacing wire respectively including setting up in the newly-increased concrete column of former building a wall body reinforcing part both sides, with former building a wall body vertically newly-increased concrete column both sides, the lacing wire runs through the lacing wire preformed hole at former building a wall body reinforcing part, be equipped with the atress in the newly-increased concrete column and indulge the muscle, the peripheral ligature respectively of muscle is indulged to the atress of former building a wall body reinforcing part both sides has the stirrup.

Preferably, the diameter of the stressed longitudinal bar is not less than 14mm, the diameter of the stirrup is not less than 8mm, and the distance between the stirrups is 100 mm-200 mm.

Preferably, the two ends of the tie bar are bent to form anchoring bars parallel to the positive vertical surfaces of the newly-added concrete columns on the two sides.

Preferably, the diameter of the tie bar is not less than 10mm, the length of the anchoring bar is not less than 15d, and d is the diameter of the tie bar.

Preferably, the ends of the anchoring ribs are bent to form a draw hook.

Preferably, a layer of cement paste is brushed on the contact surface of the original wall and the newly-added concrete column so as to increase the cohesiveness of the newly-added concrete column and the original wall.

Preferably, the aperture of the lacing wire preformed hole is 2.5 times of that of the lacing wire straight channel, resin mortar is poured into the lacing wire preformed hole, the cohesive force of the lacing wire and the wall body is increased, the contact between the lacing wire and the air is isolated, and the durability of the lacing wire is improved.

Compared with the defects and shortcomings of the prior art, the utility model has the following beneficial effects:

(1) the reinforced concrete column is additionally arranged on the basis of the original masonry wall, and the reinforced concrete column and the original masonry wall are integrated through the tie bars, so that the advantage of large internal rigidity of the masonry wall is fully exerted, and the defect of small external rigidity of the masonry wall surface can be overcome by the newly arranged reinforced concrete column. Therefore, the seismic performance of the structure can be greatly improved.

(2) The reinforced structure of the utility model can not damage the structure of the original masonry wall body, and can not cause the problem that the stress member is damaged due to stress redistribution after the individual part of the original masonry wall body is chiseled.

(3) The utility model saves the support to the original structure in the construction process, greatly reduces the construction cost and shortens the construction period.

Drawings

Fig. 1 is a schematic view of a reinforcing structure of a masonry wall with reinforced concrete columns according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a tie bar provided in the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a stirrup according to an embodiment of the present invention.

In the figure: 1-original building of a wall body; 2-stretching the ribs; 3-stretching a preformed hole; 4-anchoring ribs; 5-stressed longitudinal bars; 6-stirrup; 7-adding a concrete column; 8-contact surface; 9-pulling hook.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

As shown in fig. 1-3, a reinforced structure of a masonry wall with additional reinforced concrete columns comprises an original masonry wall body 1 and additional reinforced concrete columns 7, wherein the additional reinforced concrete columns 7 are respectively arranged on two sides of a reinforced part of the original masonry wall body 1, stress longitudinal ribs 5 are arranged in the additional reinforced concrete columns 7, and stirrups 6 are respectively bound on the peripheries of the stress longitudinal ribs 5 on two sides of the reinforced part of the original masonry wall body 1. The original wall body 1 is effectively bonded with a newly poured concrete column through surface treatment of the original wall body 1 (a layer of cement paste is brushed on a contact surface 8 of the original wall body 1); meanwhile, the two sides of the newly added concrete column 7 vertical to the original wall 1 are respectively provided with the tie bars 2, the tie bars 2 penetrate through the tie bar preformed holes 3 at the reinforcing part of the original wall 1, and the reinforcement is carried out through the tie bars 2 to form the reinforced concrete masonry combined column. Because the brickwork rigidity is great along the brickwork wall direction, former brickwork wall body 1 and newly-increased concrete column 7 undertake the effort of this direction jointly, and in perpendicular brickwork wall direction, because the brickwork is less at the centre atress, the pulling force is undertaken by the reinforcing bar in the concrete column when the combination post is bent.

As shown in fig. 2, the two ends of the tie bar 2 are bent to form anchoring bars 4 parallel to the vertical surfaces of the newly added concrete columns 7 on the two sides, and the end parts of the anchoring bars 4 are bent to form drag hooks 9, so that the function between the tie bar 2 and the newly added concrete columns 7 is increased. The diameter of the tie bar 2 is not less than 10mm, the length of the anchoring bar 4 is not less than 15d, and d is the diameter of the tie bar 2. The aperture of the lacing wire preformed hole 3 is 2.5 times of the diameter of the lacing wire 2, resin mortar is poured into the lacing wire preformed hole 3, the cohesive force of the lacing wire 2 and a wall body is increased, the contact between the lacing wire 2 and the air is isolated, and the durability of the lacing wire 2 is improved. The diameter of the stressed longitudinal bar 5 is not less than 14mm, the diameter of the stirrup 6 is not less than 8mm, and the distance between the stirrups 6 is 100 mm-200 mm.

The construction method comprises the following steps:

a. and (3) positioning the reinforcing part of the original masonry wall body 1, marking the positions of the tie bars 2 and the newly added concrete columns 7, wherein the vertical distance between the tie bars 2 is 200-300 mm, and the tie bars 2 are suitable to be arranged at the horizontal brick joints.

b. The method comprises the steps of punching holes in tie bars 2 of an original building wall body 1 by an electric drill to form a tie bar reserved hole 3, chiseling a mortar surface layer on the surface of the original building wall body 1 at a position of a newly-added concrete column 7, removing mortar joints to the depth of 10mm, brushing residual ash by a steel wire brush, and removing floating dust on the surface of the wall body and in a reserved hole by an air pump.

c. Inserting the tie bar 2 into the tie bar prepared hole 3, bending the tie bar 2, positioning by adopting a bracket, and pouring resin mortar into the tie bar prepared hole 3, wherein the 3d compressive strength of the resin mortar is not less than 30MPa, the 28d cleavage tensile strength is not less than 5MPa, and the 28d rupture strength is not less than 10 MPa.

d. And binding the stressed longitudinal rib 5 and the stirrup 6 of the concrete column after the resin mortar in the tie bar preformed hole 3 is solidified.

e. After the steel bars are bound, removing mortar from the contact surface 8 of the original wall 1 at the position of the newly added reinforced concrete column, watering and prewetting the surface of the wall, brushing a layer of cement paste, and finally pouring fine aggregate concrete or grouting material. The concrete base surface is fully sprayed with water for infiltration before pouring, the amount of water is mixed according to the requirements of product specifications when the grouting material is mixed, the gas can be ensured to freely escape in the pouring process, the pouring is ensured to be compact, and appropriate maintenance measures are required after the pouring is finished. The strength of the adopted fine aggregate concrete and grouting material is not less than 30MPa, and the maximum grain size of the coarse aggregate is not more than 25 mm.

Example (b): taking a four-layer brick-concrete structure teaching building as an example, the thickness of the outer wall of a brick masonry wall is 370mm, the thickness of the inner wall is 240mm, the seismic fortification intensity is 8 degrees, the classroom bay is large, a reinforced concrete combination column is additionally arranged in the middle position of the wall between the windows of a classroom (namely the lap joint position of a classroom crossbeam and the masonry wall), the size of the combination column is 500mm, and the thickness of the concrete columns on two sides of the masonry wall is 200 mm. The lacing wire adopts the screw-thread steel that the diameter is 12mm, and vertical interval is about 200mm (taking 4 bricks thick, punching in the middle of the brickwork joint), and the concrete column stirrup diameter is 8mm, and the interval is 200mm, and 6 on every side of vertical reinforcing bar adopt the diameter to be 16 mm's screw-thread steel. All the used steel bars are made of HRB400 grade steel, and the design value of the tensile strength is 360 MPa. The concrete adopts self-compacting grouting material, the compressive strength is 30MPa, and the maximum grain size of the coarse aggregate is 20 mm. The lacing wire preformed hole is filled with epoxy resin mortar, the 3d compressive strength of the epoxy resin mortar is not less than 30MPa, the 28d cleavage tensile strength is not less than 5MPa, and the 28d rupture strength is not less than 10 MPa. After the concrete column is additionally arranged, the shear strength and the shock resistance of the brick masonry wall are both remarkably improved, the integrity is good, the cracking of the wall body is effectively restrained, the deformation capability of the wall body is improved, and the damage degree of the brick masonry structure under the action of an earthquake is effectively reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a reinforced structure of reinforced concrete post is add to brickwork wall, its characterized in that, including setting up in the newly-increased concrete column of former building a wall body reinforcing part both sides, is equipped with the lacing wire respectively with former building a wall body vertically newly-increased concrete column both sides, the lacing wire runs through the lacing wire preformed hole at former building a wall body reinforcing part, it indulges the muscle to be equipped with the atress in the newly-increased concrete column, and the peripheral ligature respectively of muscle is indulged to the atress of former building a wall body reinforcing part both sides has the stirrup.

2. The reinforced structure of the steel reinforced concrete column additionally arranged on the masonry wall according to claim 1, wherein the diameter of the stressed longitudinal rib is not less than 14mm, the diameter of the stirrup is not less than 8mm, and the distance between the stirrups is 100 mm-200 mm.

3. The reinforced structure of a masonry wall with additional reinforced concrete columns as claimed in claim 1, wherein two ends of the tie bar are bent to form anchoring bars parallel to the vertical faces of the newly added concrete columns on two sides.

4. A masonry wall reinforced concrete column reinforcement structure according to claim 3, wherein said tie bars have a diameter of not less than 10mm, said anchoring bars have a length of not less than 15d, and d is the diameter of the tie bars.

5. A masonry wall reinforced concrete column reinforcement structure as defined in claim 3, wherein said anchoring ribs are bent at their ends to form hooks.

6. A reinforced structure with additional reinforced concrete columns for masonry wall according to claim 1, wherein a layer of cement paste is brushed on the contact surface of the original masonry wall and the additional reinforced concrete columns.

7. The reinforced structure of a masonry wall with an added reinforced concrete column as claimed in claim 1, wherein the diameter of the tie bar reserved hole is 2.5 times of the diameter of the tie bar straight line, and the tie bar reserved hole is filled with resin mortar.

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