A prestressed angle steel reinforced column device

Abstract

This utility model discloses a prestressed angle steel reinforced column device, including a connecting plate, an upper inner angle steel, a lower inner angle steel, high-strength bolts, a load-bearing steel plate, a stiffening steel plate, and connecting bolts. The joints of the upper and lower inner angle steels overlap. Connecting bolts are installed at the locations where the outer angle steel on the upper inner angle steel has elongated slots, used to connect to the lower inner angle steel. A load-bearing steel plate and a stiffening steel plate are welded to the lower end of the upper inner angle steel, and the same applies to the upper end of the lower inner angle steel. The device features low prestress loss and good controllability of prestress. During construction, there are no unloaded angle steels; prestress loss is mainly due to bolt release and stress relaxation, which can be effectively compensated for by adjusting the process and over-tensioning. Applying prestress is convenient and safe. Prestress is applied through bolts in a smooth process, and because the total stroke is small, it can be retightened later to compensate for some prestress loss.

Description

Technical Field

[0001] This utility model belongs to the field of structural reinforcement technology, specifically, it relates to a prestressed angle steel reinforced column device. Background Technology

[0002] With the acceleration of urbanization, a large number of old buildings face the problem of weakened structural function, requiring extensive repair and reinforcement. Among these, the reinforcement technology for columns, as important load-bearing components in building structures, is particularly crucial. When columns are reinforced using conventional methods, there is a significant stress lag phenomenon in the added materials. Even considering that the materials themselves have a certain degree of plastic deformation capacity, which can adjust for stress imbalances to some extent, this adjustment capacity is limited. When the initial stress level of the reinforcing steel is high and the axial compression ratio of the column is close to the limit, individual failures can easily occur.

[0003] Prestressed reinforcement can unload the original structure and allow the added material to directly participate in the structural stress, effectively solving the problems of stress lag in the added material and structural stress incoordination, thus improving the structural performance of the component. Currently, there are two main methods for prestressed angle steel reinforcement of columns: the pre-bending angle steel method has the main problem of poor controllability of the overall reinforcement parameters, requiring subsequent welding of the gusset plates after prestressing construction, resulting in a large amount of on-site welding work and a high risk of prestress loss during the welding process; the jacking method has the main problem of a considerable length of angle steel (approximately 40cm) not being stressed during prestressing construction. Stress only begins to be applied to the unstressed angle steel after the jacks are released, while the pre-stressed angle steel relaxes, causing a decrease in stress. Therefore, the prestress loss is too large, the prestressing effect is limited, and the operation is relatively difficult.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies.

[0005] Therefore, in order to solve the above problems, this utility model provides a prestressed angle steel reinforced column device. Utility Model Content

[0006] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a prestressed angle steel reinforcement column device to solve the problems of uncontrollable reinforcement parameters, large amount of on-site welding work in the later stage, excessive prestress loss, limited prestress effect, and difficult operation in the existing technology.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A prestressed angle steel reinforced column device includes a connecting plate, an upper inner angle steel, a lower inner angle steel, high-strength bolts, a load-bearing steel plate, a stiffening steel plate, and connecting bolts. The joints of the upper and lower inner angle steels have overlapping areas. Connecting bolts are provided at the locations where the outer angle steel of the upper inner angle steel has elongated slots for connecting the lower inner angle steel. The lower end of the upper inner angle steel is welded with a load-bearing steel plate and a stiffening steel plate, and the upper end of the lower inner angle steel is also welded with a load-bearing steel plate and a stiffening steel plate.

[0009] Furthermore, the upper inner angle steel and the connecting plate, and the lower inner angle steel and the connecting plate are all connected by perimeter welding, and the overlapping part of the upper inner angle steel and the lower inner angle steel is placed in the non-reinforced area of ​​the connecting plate.

[0010] Furthermore, the stiffening steel plate on the upper inner angle steel is connected to the reserved slot of the lower inner angle steel by connecting bolts.

[0011] Furthermore, the load-bearing steel plates on the upper inner angle steel and the lower inner angle steel are connected by four high-strength bolts.

[0012] Furthermore, the upper inner angle steel and the lower inner angle steel are fixed to the column by injecting structural adhesive.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, the prestress loss is small and the prestress controllability is good; there are no unstressed angle steels during construction, and the prestress loss is mainly due to screw release and stress relaxation loss, which can be effectively compensated by adjusting the process and over-tensioning.

[0015] 2. In this utility model, the application of prestress is convenient and safe; the application of prestress through bolts is a smooth process, and because its total stroke is not large, the construction efficiency is high. It can also be tightened later to make up for some of the prestress loss.

[0016] 3. In this utility model, the process is simple and economical; the subsequent welding connection only requires welding the angle steel tips of the overlapping area with side fillet welds to meet the requirements, and the high-strength bolts and accessories can be reused, making it even more economical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is an overall front view of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the present invention;

[0021] Figure 4 This is a schematic diagram of the elevation of the upper inner angle steel of this utility model;

[0022] Figure 5 This is a schematic diagram of the lower inner angle steel of this utility model.

[0023] Figure label:

[0024] 1. Bracing plate; 2. Upper inner angle steel; 3. Lower inner angle steel; 4. High-strength bolts; 5. Load-bearing steel plate; 6. Stiffening steel plate; 7. Connecting bolts. Detailed Implementation

[0025] The utility model will now be further described with reference to the accompanying drawings and specific embodiments:

[0026] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and 5 According to an embodiment of this utility model, a prestressed angle steel reinforced column device includes a connecting plate 1, an upper inner angle steel 2, a lower inner angle steel 3, a high-strength bolt 4, a load-bearing steel plate 5, a stiffening steel plate 6, and a connecting bolt 7. The upper inner angle steel 2 and the lower inner angle steel 3 are fixed to the column body by injecting structural adhesive. The joint of the upper inner angle steel 2 and the lower inner angle steel 3 has an overlapping area. The upper inner angle steel 2 has a long slot at the outer angle steel with a connecting bolt 7 for connecting the lower inner angle steel 3. The lower end of the upper inner angle steel 2 is welded with a load-bearing steel plate 5 and a stiffening steel plate 6. The stiffening steel plate 6 on the upper inner angle steel 2 can slide in the long slot of the lower inner angle steel 3 to apply prestress. The upper end of the lower inner angle steel 3 is also welded with a load-bearing steel plate 5 and a stiffening steel plate 6.

[0027] Please see Figure 1 , Figure 2 and Figure 3 The upper inner angle steel 2 and the gusset plate 1, and the lower inner angle steel 3 and the gusset plate 1 are connected by perimeter welding. Before welding, the contact surface is cleaned. The weld height is usually not less than 5mm and not more than 1.2 times the thickness of the thinner component. The overlapping part of the upper inner angle steel 2 and the lower outer angle steel 3 is placed in the non-reinforced area of ​​the gusset plate 1.

[0028] Please see Figure 2 , Figure 4 and Figure 5 The stiffening steel plate 6 on the upper inner angle steel 2 is connected to the reserved slot of the lower inner angle steel 3 by connecting bolts 7. The stiffening steel plate 6 on the upper inner angle steel 2 and the connecting bolts 7 pass through the reserved slot of the lower inner angle steel 3. First, the upper inner angle steel 2 and the lower inner angle steel 3 are initially connected and positioned by connecting bolts 7, and then the load-bearing steel plate 5 on the upper inner angle steel 2 is welded around it.

[0029] Please see Figure 1 and Figure 2 The load-bearing steel plates 5 on the upper inner angle steel 2 and the lower inner angle steel 3 are connected by four high-strength bolts 4. After installation, they are tightened synchronously. A torque wrench is used to set the corresponding torque according to the pre-calculated pretension. After the torque is applied, the prestressing construction is completed. The high-strength bolts 4 are connected to the load-bearing steel plates 5. By tightening the high-strength bolts 4, a downward pressure is generated at the upper end of the lower inner angle steel 3 and an upward pressure is generated at the lower end of the upper inner angle steel 2, thereby generating prestress in all the angle steels.

[0030] The working principle of this utility model patent for a prestressed angle steel reinforcement column device is as follows: First, the upper inner angle steel 2 and the connecting plate 1, and the lower inner angle steel 3 and the connecting plate 1 are connected by perimeter welding. Then, the stiffening steel plate 6 and the connecting bolt 7 on the upper inner angle steel 2 pass through the reserved slots of the lower inner angle steel 3. The upper inner angle steel 2 and the lower inner angle steel 3 are initially connected and positioned by the connecting bolt 7. Then, the load-bearing steel plate 5 on the upper inner angle steel 2 is perimeter welded. It is connected to the upper and lower load-bearing steel plates 5 by high-strength bolts 4. After installation, the high-strength bolts 4 are tightened synchronously. A torque wrench is used to set the pre-calculated pre-tension force. The corresponding torque is applied, and the prestressing construction is completed after the torque is applied. By tightening the high-strength bolts 4, downward pressure is generated at the upper end of the lower inner angle steel 3 and upward pressure is generated at the lower end of the upper inner angle steel 2, thereby generating prestress in all angle steels. Tighten the connecting bolts 7 that connect the upper inner angle steel 2 and the lower inner angle steel 3, weld the upper inner angle steel 2 and the lower inner angle steel 3, inject structural adhesive between the angle steel and the column, and simultaneously loosen the high-strength bolts 4. After removal, it can be reused. Cut off the protruding stiffening steel plate 6 and the load-bearing steel plate 5. The subsequent construction process is the same as the conventional angle steel reinforcement method.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pre-stressed bundled steel angle column reinforcement device, characterized in that: It includes a gusset plate (1), an upper inner angle steel (2), a lower inner angle steel (3), a high-strength bolt (4), a load-bearing steel plate (5), a stiffening steel plate (6), and a connecting bolt (7). The joint of the upper inner angle steel (2) and the lower inner angle steel (3) has an overlapping area. The upper inner angle steel (2) has a long slot at the outer angle steel with a connecting bolt (7) for connecting the lower inner angle steel (3). The lower end of the upper inner angle steel (2) is welded with a load-bearing steel plate (5) and a stiffening steel plate (6). The upper end of the lower inner angle steel (3) is also welded with a load-bearing steel plate (5) and a stiffening steel plate (6).

2. The pre-stressed bundled steel angle column device according to claim 1, characterized in that: The upper inner angle steel (2) and the connecting plate (1), and the lower inner angle steel (3) and the connecting plate (1) are all welded together by perimeter welding. The overlapping part of the upper inner angle steel (2) and the lower inner angle steel (3) is placed in the non-densified area of ​​the connecting plate (1).

3. The pre-stressed bundled steel angle column device according to claim 1, wherein: The stiffening steel plate (6) on the upper inner angle steel (2) is connected to the reserved slot of the lower inner angle steel (3) by connecting bolts (7).

4. The pre-stressed bundled steel angle column device of claim 1, wherein: The load-bearing steel plates (5) on the upper inner angle steel (2) and the lower inner angle steel (3) are connected by four high-strength bolts (4).

5. The pre-stressed bundled steel angle column device of claim 1, wherein: The upper inner angle steel (2) and the lower inner angle steel (3) are fixed to the column by injecting structural adhesive.

Images