Stainless steel-concrete combined reinforcing structure of reinforced concrete column

Abstract

The utility model discloses a stainless steel-concrete combined reinforcing structure of a reinforced concrete column, which is characterized in that a reinforcing structure 3 is arranged outside an original reinforced concrete column 1 and comprises an outer wrapping steel plate 31 and a filling material layer 35, the original reinforced concrete column 1 is fixed to the periphery of the side to be reinforced of the original reinforced concrete column 1 in a four-face reinforcing mode, a two-face-face reinforcing mode, a two-adjacent-face reinforcing mode or a three-face reinforcing mode. The reinforcing structure 3; the outer wrapping steel plate 31 is fixed to the side to be reinforced of the original reinforced concrete column 1, and corner sealing of the outer wrapping steel plate 31 is completed through welding by means of the angle steel 32 and the T-shaped stainless steel connecting piece 36. And a filling material layer 35 is arranged between the wrapping steel plate 31 and the original reinforced concrete column 1. The bearing capacity, the crack resistance, the deformation resistance, the high-temperature resistance and the corrosion resistance of an original reinforced concrete column are remarkably improved, meanwhile, the appearance is effectively improved, and the formwork removal procedure and the anti-corrosion treatment procedure are reduced or even avoided.

Description

Technical Field

[0001] This utility model belongs to the field of building structure reinforcement, and specifically relates to a stainless steel-concrete composite reinforcement structure for reinforced concrete columns. It is suitable for structures in highly corrosive environments (such as coastal areas, chemical plants, and sewage treatment facilities) and special structures with extremely high durability requirements (such as nuclear power plants, bridge support columns, and core tubes of important public buildings). Background Technology

[0002] In modern civil engineering, many existing concrete structures suffer from varying degrees of structural performance degradation due to prolonged service life or harsh external environments. This is particularly true in environments with high corrosion, high humidity, or extreme temperatures, where the durability of existing reinforced concrete columns is severely compromised. Corrosion not only causes concrete carbonation and steel reinforcement corrosion in existing reinforced concrete columns but can also lead to crack propagation and reduced load-bearing capacity, seriously affecting the safety and functionality of existing structures. Traditional concrete structure reinforcement methods, such as cross-section enlargement, prestressing, steel plate bonding, and FRP reinforcement, demonstrate certain applicability in specific application scenarios. However, in environments with high corrosion and high durability requirements, their durability and construction limitations often fail to meet practical needs.

[0003] Compared to carbon steel, stainless steel offers significant performance advantages, particularly in corrosion resistance and durability. Containing alloying elements such as chromium (Cr) and nickel (Ni), stainless steel forms a dense passivation film on its surface, effectively resisting corrosion from oxidation, acids, alkalis, and salt spray environments. This results in a service life far exceeding that of carbon steel under humid, high-salt, or chemically corrosive conditions. Furthermore, stainless steel possesses excellent ductility and plasticity, making it suitable for processing and forming complex shapes. Its aesthetically pleasing surface and low maintenance requirements significantly reduce maintenance costs during use. Although more expensive, stainless steel offers irreplaceable comprehensive advantages in engineering projects demanding high corrosion, high strength, or high aesthetics, making it the preferred material for achieving long-term economic benefits. Summary of the Invention

[0004] To overcome the limitations of traditional concrete structure reinforcement technologies, this utility model provides a stainless steel-concrete composite reinforcement structure for reinforced concrete columns. The outer stainless steel plate, stainless steel angle steel, and T-shaped stainless steel connectors not only serve as pouring templates for the internal filling material but also participate in the main load-bearing structure. This significantly improves the original reinforced concrete column's load-bearing capacity, crack resistance, deformation capacity, and corrosion resistance while effectively improving its appearance and reducing or even eliminating the need for formwork removal and anti-corrosion treatment. It can reinforce two, two adjacent, three, and four sides of the original reinforced concrete column, making it suitable for structures in highly corrosive environments (such as coastal areas, chemical plants, and sewage treatment facilities) and special structures with extremely high durability requirements (such as nuclear power plants, bridge bearing columns, and core tubes of important public buildings).

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A stainless steel-concrete composite reinforcement structure for a reinforced concrete column includes an original reinforced concrete column 1 and an original foundation 2. The feature is that a reinforcement structure 3 is provided outside the original reinforced concrete column 1. The reinforcement structure is a stainless steel-concrete composite reinforcement structure. The reinforcement structure is fixed to the outer periphery of the original reinforced concrete column 1 on the side to be reinforced by means of four-sided reinforcement, two-to-two-opposite reinforcement, two-adjacent-side reinforcement, or three-sided reinforcement.

[0007] The aforementioned stainless steel-concrete composite reinforcement structure for a reinforced concrete column includes an outer steel plate 31 and a filling material layer 35. The outer steel plate 31 is fixed to the side of the original reinforced concrete column 1 to be reinforced, and its corners are sealed by welding with the help of angle steel 32 and T-shaped stainless steel connectors 36. A filling material layer 35 is provided between the outer steel plate 31 and the original reinforced concrete column 1.

[0008] In the aforementioned stainless steel-concrete composite reinforcement structure for a reinforced concrete column, the inner side of the outer steel plate 31 is connected to the filling material layer 35 through a T-shaped perforated steel plate connector 331, and the outer bottom of the outer steel plate 31 is connected to the original foundation 2 through a straight perforated steel plate connector 332.

[0009] In the aforementioned stainless steel-concrete composite reinforcement structure for a reinforced concrete column, on the side of the original reinforced concrete column to be reinforced, the straight-shaped perforated steel plate connector 332 is evenly and centrally arranged along the outer steel plate 31 in the transverse direction; on the side of the original reinforced concrete column not requiring reinforcement, the straight-shaped perforated steel plate connector 332 is fixed on the T-shaped stainless steel connector 36, and the bottom of the straight-shaped perforated steel plate connector 332 is connected to the original foundation 2.

[0010] In the aforementioned stainless steel-concrete composite reinforcement structure for reinforced concrete columns, the T-shaped stainless steel connector 36 is arranged longitudinally along the corner of the original reinforced concrete column to be reinforced and is anchored by anchor bolts 37. Both the outer stainless steel plate 31 and the stainless steel T-shaped connector 36 are connected and sealed at the corners by welding angle steel 32.

[0011] The aforementioned stainless steel-concrete composite reinforcement structure for a reinforced concrete column connects and reinforces the original reinforced concrete column 1 and the filling material layer 35 through rebar 34. The shape of the rebar 34 includes, but is not limited to, L-shaped, U-shaped, straight anchor head type, and Z-shaped. The rebar material includes, but is not limited to, ordinary round steel bars, ribbed steel bars, stainless steel bars, glass fiber reinforced plastic bars, and carbon fiber bars.

[0012] The aforementioned stainless steel-concrete composite reinforcement structure for reinforced concrete columns includes, but is not limited to, round holes, elliptical holes, rectangular holes, serrated holes, and trapezoidal holes in the opening shapes of the T-shaped perforated steel plate connector 331 and the straight perforated steel plate connector 332.

[0013] The aforementioned stainless steel-concrete composite reinforcement structure for reinforced concrete columns includes, but is not limited to, fine aggregate concrete, grouting material, epoxy mortar, coral aggregate concrete, and seawater sand concrete in the filling material layer 35.

[0014] The advantages and effects of this utility model are:

[0015] 1. Superior load-bearing performance. The T-shaped perforated steel plate connectors, T-shaped stainless steel connectors, and rebar reinforcement enhance the combined effect between the original reinforced concrete column, the infill material, and the outer steel plate, effectively solving the problem of weak bonding between the old and new concrete interfaces. The outer steel plate, angle steel, and T-shaped stainless steel connectors not only serve as casting templates but also directly participate in load-bearing, greatly improving the load-bearing capacity and stiffness of the original reinforced concrete column. At the same time, the high ductility and crack resistance of the stainless steel plate significantly improve the crack resistance, deformation capacity, and overall performance of the original reinforced concrete column.

[0016] 2. Convenient construction. The formwork for pouring the filling material layer is made directly using outer steel plates, angle steel, and T-shaped stainless steel connectors, which effectively reduces or even eliminates the need for formwork removal and anti-corrosion treatment.

[0017] 3. High economic benefits. This utility model can reinforce the original reinforced concrete column on two opposite sides, two adjacent sides, three sides, and four sides with minimal interference to the original structure. It is suitable for use in places where the function is not interrupted or the construction space is limited, thus reducing economic losses. The stainless steel surface is aesthetically pleasing and requires little maintenance, significantly reducing the cost of later maintenance and repair.

[0018] In summary, a stainless steel-concrete composite reinforcement structure for reinforced concrete columns improves the safety, stability, and durability of the original reinforced concrete columns while offering convenient construction and high economic benefits, thus highly aligning with the sustainable development strategy of high-performance structural engineering. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a four-sided reinforced concrete column reinforced according to one embodiment of the present invention; (a) perspective view, (b) AA section view, (c) BB section view;

[0020] Figure 2 This is a schematic diagram of a three-sided reinforced concrete column reinforced according to a second embodiment of this utility model; (a) perspective view, (b) AA section view, (c) BB section view;

[0021] Figure 3 This is a schematic diagram of a three-dimensional embodiment of the present invention, showing the reinforcement of an original reinforced concrete column on two opposite sides; (a) perspective view, (b) AA cross-section view, (c) BB cross-section view;

[0022] Figure 4 This is a schematic diagram of the reinforcement of the original reinforced concrete column on two adjacent sides in the fourth embodiment of this utility model; (a) perspective view, (b) AA section view, (c) BB section view;

[0023] Explanation of main attached diagram markings: 1-Original reinforced concrete column; 2-Original foundation; 3-Reinforced structure; 31-Outer steel plate; 331-T-shaped perforated steel plate connector; 332-I-shaped perforated steel plate connector; 32-Angle steel; 34-Rebar installation; 35-Filling material layer; 36-T-shaped stainless steel connector; 37-Anchor bolt. Detailed Implementation

[0024] The technical solution of this utility model will be described below with reference to the accompanying drawings and specific embodiments: Example

[0025] Reference Figures 1 to 4 As shown, a stainless steel-concrete composite reinforcement structure for a reinforced concrete column includes an original reinforced concrete column 1, an original foundation 2, and a reinforcement structure 3. The reinforcement structure is a stainless steel-concrete composite reinforcement structure with a cross-section larger than that of the original reinforced concrete column 1. The reinforcement structure is fixed to the outer periphery of the original reinforced concrete column 1 to be reinforced by means of four-sided reinforcement, two-to-two-opposite reinforcement, two-adjacent-side reinforcement, and three-sided reinforcement.

[0026] The reinforcement structure 3 includes an outer steel plate 31, angle steel 32, T-shaped perforated steel plate connectors 331, straight-line perforated steel plate connectors 332, rebar 34, a filling material layer 35, T-shaped stainless steel connectors 36, and anchor bolts 37. The outer steel plate 31 is connected to the filling material layer 35 via the T-shaped perforated steel plate connectors 331 and to the original foundation 2 via the straight-line perforated steel plate connectors 332. The T-shaped perforated steel plate connectors 331 and the straight-line perforated steel plate connectors 332 are evenly arranged on the inner and outer sides of the outer steel plate 31.

[0027] The opening shapes of the T-shaped perforated steel plate connector 331 and the straight perforated steel plate connector 332 can be round, elliptical, rectangular, serrated, trapezoidal, etc. The opening shape is reasonably selected by comprehensively considering factors such as stress characteristics, component size, and construction requirements, so as to ensure that the filling material layer 35 and the outer steel plate 31 form an efficient shear force transfer and overall synergistic effect.

[0028] The anchor bar 34 is used to connect the original reinforced concrete column 1 to the infill material layer 35. The anchor bar 34 can be L-shaped, U-shaped, straight anchor head type, Z-shaped, etc., and the reinforcement material can be ordinary round steel bar, ribbed steel bar, stainless steel bar, glass fiber reinforced plastic bar, carbon fiber bar, etc. According to the project requirements, the stress characteristics, strength requirements, service environment, construction feasibility and economy of the reinforced component, and the bonding performance between the reinforcement material and the anchoring adhesive should be comprehensively considered to rationally select the reinforcement material and shape to ensure the connection effect and long-term durability.

[0029] The T-shaped perforated steel plate connector 331 is evenly arranged laterally along the inner side of the outer steel plate 31 and is arranged longitudinally along the entire length; the T-shaped stainless steel connector 36 is evenly arranged laterally and longitudinally along the original reinforced concrete column 1, and the anchor bolt holes should avoid the longitudinal reinforcement and stirrups inside the column.

[0030] The straight-shaped perforated steel plate connector 332 is arranged horizontally and evenly along the outer side of the outer steel plate 31.

[0031] According to Figure 2 As shown, when two-sided or three-sided reinforcement is required, the side of the original reinforced concrete column that does not need reinforcement is fixed by the straight perforated steel plate connector 332, which is centered on the contact surface between the T-shaped stainless steel connector 36 and the unreinforced side of the original reinforced concrete column 1. The connection method between the straight perforated steel plate connector 332 and the original foundation 2 is determined according to the requirements of the "Code for Design of Reinforcement of Concrete Structures" and the "Concrete Structure Reinforcement Construction".

[0032] When reinforcing an existing reinforced concrete column 1 on all four sides, the outer steel plate 31 is welded to the angle steel 32 to complete the corner connection and closure. When reinforcing the original reinforced concrete column 1 on two opposite sides, two adjacent sides, and three sides, the longitudinally arranged T-shaped stainless steel connectors 36 are anchored to the column corners of the original reinforced concrete column 1 to be reinforced by anchor bolts 37, and the outer stainless steel plate 31 and the T-shaped stainless steel connectors 36 are welded to the angle steel 32 to complete the corner connection and closure.

[0033] The filling material 35 is poured into the cavity formed between the original reinforced concrete column 1 and the outer stainless steel plate 31, angle steel 32 and T-shaped stainless steel connector 36. It can be fine stone concrete, grouting material, epoxy mortar, coral aggregate concrete or seawater sand concrete.

Claims

1. A stainless steel-concrete composite reinforcement structure for a reinforced concrete column, comprising the original reinforced concrete column (1) and the original foundation (2), characterized in that, A reinforcement structure (3) is provided outside the original reinforced concrete column (1). The reinforcement structure is a stainless steel-concrete composite reinforcement structure. The reinforcement structure is fixed to the outer periphery of the original reinforced concrete column (1) on the side to be reinforced by means of four-sided reinforcement, two-sided reinforcement, two-adjacent reinforcement, or three-sided reinforcement. The reinforcement structure (3) includes an outer steel plate (31) and a filling material layer (35). The outer steel plate (31) is fixed to the side of the original reinforced concrete column (1) to be reinforced, and the corner is closed by welding with the help of angle steel (32) and T-shaped stainless steel connector (36). A layer of filling material (35) is provided between the outer steel plate (31) and the original reinforced concrete column (1).

2. The stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 1, characterized in that, The inner side of the outer steel plate (31) is connected to the filling material layer (35) through a T-shaped perforated steel plate connector (331), and the bottom outer side of the outer steel plate (31) is connected to the original foundation (2) through a straight perforated steel plate connector (332).

3. The stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 2, characterized in that, On the side of the original reinforced concrete column to be reinforced, the straight perforated steel plate connector (332) is evenly arranged in the transverse center along the outer steel plate (31); on the side of the original reinforced concrete column that does not need to be reinforced, the straight perforated steel plate connector (332) is fixed on the T-shaped stainless steel connector (36), and the bottom of the straight perforated steel plate connector (332) is connected to the original foundation (2).

4. The stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 1, characterized in that, The T-shaped stainless steel connector (36) is arranged longitudinally along the corner of the original reinforced concrete column to be reinforced and is anchored by anchor bolts (37). The corner connection and closure of the outer steel plate (31) and the T-shaped stainless steel connector (36) are completed by welding angle steel (32).

5. A stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 1, characterized in that, The original reinforced concrete column (1) and the filling material layer (35) are connected and reinforced by rebar (34); the shape of the rebar (34) includes but is not limited to L-shape, U-shape, straight anchor head type, Z-shape; the rebar material includes but is not limited to ordinary round steel bar, ribbed steel bar, stainless steel bar, glass fiber reinforced plastic bar, carbon fiber bar.

6. A stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 2, characterized in that, The opening shapes of the T-shaped perforated steel plate connector (331) and the straight perforated steel plate connector (332) include, but are not limited to, round holes, elliptical holes, rectangular holes, sawtooth holes, and trapezoidal holes.

7. A stainless steel-concrete composite reinforcement structure for a reinforced concrete column according to claim 2, characterized in that, The materials of the filling material layer (35) include, but are not limited to, fine stone concrete, grouting material, epoxy mortar, coral aggregate concrete or seawater sand concrete.

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