Reinforcing structure applied to existing brick column

Abstract

The utility model provides a reinforcing structure applied to an existing brick column, and belongs to the technical field of building structure reinforcing, the reinforcing structure comprises a plurality of steel angles and a plurality of circles of fixing ropes, the steel angles are respectively and longitudinally arranged at four corners of the existing brick column; the multiple circles of fixing ropes are evenly arranged in the height direction of the existing brick column at intervals, and the angle steel is bound to the four corners of the existing brick column through the multiple circles of fixing ropes. The surface of the existing brick column and the surfaces of the angle steel are coated with cement-based surface layers; in the reinforcing process, chiseling of the original masonry is avoided, construction dust and structural disturbance are reduced, disturbance to the original structure of the existing brick column is small, construction is easy, and the engineering quality is easy to guarantee. The cement-based surface layer made of the UHP-ECC material is convenient to coat and high in durability, the reinforcing effect of the existing brick column is improved, the cement-based surface layer can be widely applied to reinforcing of the existing brick column, and the problem that the current mainstream reinforcing technology is not suitable for reinforcing of the existing brick column is solved.

Description

Technical Field

[0001] This utility model belongs to the field of building structure reinforcement technology, and in particular relates to a reinforcement structure applied to existing brick columns. Background Technology

[0002] Existing brick columns, as common load-bearing components in traditional buildings and historical heritage, often require structural reinforcement due to the brittleness of the material, historical damage, and insufficient seismic resistance. Current mainstream reinforcement techniques can be categorized into external concrete encasing reinforcement, steel hoop reinforcement, and carbon fiber reinforcement.

[0003] The external concrete reinforcement method involves binding a steel mesh to the surface of a brick column and pouring concrete to form a composite section. The drawbacks of this method include: a large amount of wet work required (formwork and vibration are necessary, resulting in a long construction period and significant disturbance to the original structure); a significant increase in self-weight (the concrete layer increases the burden on the foundation, potentially causing uneven settlement, especially in older buildings); and interfacial bonding problems (differences in modulus between new and old materials can easily lead to delamination and damage).

[0004] The steel hoop reinforcement method refers to welding steel hoops around brick columns to provide lateral restraint through the tightening force. The disadvantages of this reinforcement method are: the heat-affected zone of the weld is prone to causing the bricks to crack, the steel hoop is prone to corrosion and requires regular maintenance, especially in humid environments where its lifespan is insufficient, it is difficult to fit irregular column surfaces, and it is difficult to construct on round / polygonal brick columns.

[0005] Carbon fiber cloth reinforcement refers to circumferentially bonding carbon fiber cloth to enhance restraint by utilizing its tensile strength. The drawback of this method is that imported carbon fiber cloth costs over 200 yuan / ㎡, making it uneconomical. Carbon fiber cloth is tensile but not compressive, easily breaking under overload, and lacks ductility. It requires specialized epoxy resin and strict surface treatment, and the bonding quality is affected by the skill level of the workers. Utility Model Content

[0006] In view of the above-mentioned problems in the prior art, the present invention aims to provide a reinforcement structure for existing brick columns, which solves the problem that the current mainstream reinforcement technology is not suitable for the reinforcement of existing brick columns.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0008] A reinforcement structure for existing brick columns is provided, comprising multiple angle steels and multiple loops of fixing ropes. The multiple angle steels are arranged longitudinally at the four corners of the existing brick column. The multiple loops of fixing ropes are evenly spaced along the height direction of the existing brick column, and the multiple loops of fixing ropes bind the angle steels to the four corners of the existing brick column. The surface of the existing brick column and the surface of the multiple angle steels are coated with a cement-based surface layer.

[0009] Furthermore, when the width of the existing brick column is between 370mm and 490mm, a flat steel bar is provided at the center of the width of each column surface of the existing brick column. Each flat steel bar is provided along the length of the existing brick column and is fixed to the column surface of the existing brick column by multiple turns of the fixing rope.

[0010] Furthermore, when the width of the existing brick column is greater than 490mm, at least two flat steel bars are evenly spaced on each surface of the existing brick column. Each flat steel bar is arranged along the length of the existing brick column and is fixed to the surface of the existing brick column by multiple turns of the fixing rope. The installation of flat steel bars increases the connection strength between the cement-based surface layer and the surface of the existing brick column, strengthens the structural strength of the cement-based surface layer, and effectively reduces the occurrence of holes or falling off of the cement-based surface layer.

[0011] Furthermore, each loop of the fixing rope is made of steel wire, and the vertical spacing between two adjacent loops of fixing rope is 200mm.

[0012] Furthermore, the thickness of the cement-based surface layer is 15mm-25mm. By limiting the thickness of the cement-based surface layer to 15mm-25mm, a thinner cement-based surface layer is achieved, thus saving costs and space.

[0013] Furthermore, the cement-based surface layer is made of UHP-ECC. Cement-based surface layers made of UHP-ECC have extremely high mechanical and durability properties. Their compressive strength is more than three times that of ordinary concrete, and their ultimate tensile strain is 1.2%-1.5%, which is more than 100 times that of ordinary concrete, thus improving the reinforcement effect of existing brick columns.

[0014] A reinforcement method for existing brick columns is as follows: First, remove and clean the residual mortar from the surface of the existing brick column, prepare the reinforcement work surface, and longitudinally arrange angle steel at the four corners. When the width of the existing brick column is between 370mm and 490mm, a flat steel bar is installed at the center of the width of each column surface, with a thickness typically less than or equal to 4mm. When the width of the existing brick column is greater than 490mm, at least two flat steel bars are evenly spaced on each column surface. Multiple loops of fixing rope are tied along the length of the existing brick column at 200mm intervals to fix the angle steel and flat steel bars to the existing brick column. Finally, UHP-ECC is manually applied, typically to a thickness of 15-25mm. After the UHP-ECC solidifies, a cement-based surface layer is formed, completing the reinforcement of the existing brick column.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a reinforcement structure for existing brick columns, avoiding the removal of the original masonry, reducing construction dust and structural disturbance, minimizing disturbance to the original structure of the existing brick columns, facilitating construction, and ensuring project quality. The cement-based surface layer of UHP-ECC material is easy to apply, has strong durability, and improves the reinforcement effect of existing brick columns. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a reinforcement structure applied to existing brick columns.

[0017] The components include: 1. Existing brick columns; 2. Angle steel; 3. Fixing ropes; 4. Cement-based surface layer; and 5. Flat steel. Detailed Implementation

[0018] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All inventions utilizing the concept of this utility model are protected.

[0019] like Figure 1 As shown, this utility model provides a reinforcement structure for existing brick columns, which includes multiple angle steels 2 and multiple loops of fixing ropes 3. The multiple angle steels 2 are arranged longitudinally at the four corners of the existing brick column 1, and the angle steels 2 can be L30×3. The multiple loops of fixing ropes 3 are evenly spaced along the height direction of the existing brick column 1, and the multiple loops of fixing ropes 3 bind the angle steels 2 to the four corners of the existing brick column 1. The surface of the existing brick column 1 and the surface of the multiple angle steels 2 are coated with a cement-based surface layer 4.

[0020] Preferably, but not limited to, when the width of the existing brick column 1 is between 370mm and 490mm, a flat steel bar 5 is provided at the center of the width of each column surface of the existing brick column 1. Each flat steel bar 5 is provided along the length direction of the existing brick column 1, and the flat steel bar 5 is fixed to the column surface of the existing brick column 1 by multiple turns of fixing rope 3.

[0021] When the width of the existing brick column 1 is greater than 490mm, at least two flat steel bars 5 are evenly spaced on each surface of the existing brick column 1. Each flat steel bar 5 is arranged along the length of the existing brick column 1, and the flat steel bars 5 are fixed to the surface of the existing brick column 1 by multiple turns of fixing rope 3. In this embodiment, the thickness of the flat steel bars 5 is usually less than or equal to 4mm. The arrangement of the flat steel bars 5 increases the connection strength between the cement base layer 4 and the surface of the existing brick column 1, strengthens the structural strength of the cement base layer 4, and effectively reduces the occurrence of holes or falling off of the cement base layer 4.

[0022] Specifically, each loop of fixing rope 3 is made of steel wire with a diameter of 2mm, and the vertical distance between two adjacent loops of fixing rope 3 is 200mm. Preferably, each loop of fixing rope 3 can be made of two loops of steel wire as a group, with a distance of 10mm between the two loops of steel wire, to increase the force and better fix the angle steel 2 and flat steel 5 to the column surface of the existing brick column 1.

[0023] The thickness of the cement-based surface layer 4 is 15mm-25mm. By limiting the thickness of the cement-based surface layer 4 to 15mm-25mm, a thinner layer is achieved, saving costs and space. The cement-based surface layer 4 made of UHP-ECC has extremely high mechanical properties and durability. Its compressive strength is more than three times that of ordinary concrete, and its ultimate tensile strain is 1.2%-1.5%, which is more than 100 times that of ordinary concrete, thus improving the reinforcement effect of existing brick columns. The fiber incorporated into UHP-ECC is organic polypropylene fiber. Organic polypropylene fiber is inexpensive and has good compatibility with concrete. It can improve the toughness of concrete and has little impact on the workability of concrete. This not only facilitates the mixing of UHP-ECC but also reduces material costs.

[0024] The reinforcement method applied to the existing brick column reinforcement structure is as follows: First, remove and clean the residual mortar on the surface of the existing brick column 1, and prepare the reinforcement working surface. Arrange angle steel 2 longitudinally at the four corners. When the width of the existing brick column 1 is between 370mm and 490mm, install a flat steel 5 at the center of each column surface width. The thickness of the flat steel 5 is usually less than or equal to 4mm. When the width of the existing brick column 1 is greater than 490mm, install at least two flat steel 5 evenly spaced on each column surface. Tie multiple loops of fixing rope 3 at 200mm intervals along the length of the existing brick column 1 to fix the angle steel 2 and flat steel 5 to the existing brick column 1. Finally, manually trowel UHP-ECC, with a thickness usually of 15-25mm. After the UHP-ECC solidifies, a cement-based surface layer 4 is formed, completing the reinforcement work of the existing brick column 1.

[0025] In summary, this utility model provides a reinforcement structure for existing brick columns that avoids the removal of the original masonry, reduces construction dust and structural disturbance, minimizes disturbance to the original structure of the existing brick column 1, is easy to construct, and ensures project quality. The cement-based surface layer 4 of UHP-ECC material is easy to apply, has strong durability, and improves the reinforcement effect of the existing brick column 1. It can be widely used for the reinforcement of existing brick columns, solving the problem that current mainstream reinforcement technologies are not suitable for reinforcing existing brick columns 1.

Claims

1. A reinforcing structure applied to an existing brick column, characterized by, The application comprises a plurality of angle steels and a plurality of fixing ropes, the plurality of angle steels are longitudinally arranged at four corners of the existing brick column respectively, the plurality of fixing ropes are uniformly arranged along the height direction of the existing brick column, the plurality of fixing ropes bind the angle steels at the four corners of the existing brick column, and the surface of the existing brick column and the surface of the plurality of angle steels are coated with a cement base layer.

2. The reinforcing structure for an existing brick column according to claim 1, wherein When the width of the existing brick column is 370mm-490mm, a flat steel is arranged at the width center position of each column surface of the existing brick column, each flat steel is arranged along the length direction of the existing brick column, and the flat steel is fixed on the column surface of the existing brick column through the plurality of fixing ropes.

3. The reinforcing structure for an existing brick column according to claim 1, wherein When the width of the existing brick column is greater than 490mm, at least two flat steels are uniformly arranged on each column surface of the existing brick column, each flat steel is arranged along the length direction of the existing brick column, and the flat steel is fixed on the column surface of the existing brick column through the plurality of fixing ropes.

4. The reinforcing structure for an existing brick column according to claim 1, wherein Each fixing rope is a steel wire, and the vertical spacing between two adjacent fixing ropes is 200mm.

5. The reinforcing structure for an existing brick column according to claim 1, wherein The thickness of the cement base layer is 15mm-25mm.

6. The reinforcing structure for an existing brick column according to claim 5, wherein The material of the cement base layer is UHP-ECC.

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