A test device for reinforcing a reinforced concrete eccentrically compressed column under load

Abstract

The utility model relates to concrete eccentric compression column load reinforcing technical field, concretely relates to a kind of test device for reinforcing concrete eccentric compression column load, including load holding piece, pressure sensor and two spherical hinge plates, load holding piece inside is provided with test piece loading bin, pressure sensor and spherical hinge plate are all located in test piece loading bin, and test piece placement bin is formed between two spherical hinge plates;Pressure sensor is located between spherical hinge plate and the top of test piece loading bin;By load holding piece and pressure sensor cooperation, the height of test piece placement bin can be kept under the extrusion of pressure equipment to test piece, to realize the first load to test piece in test piece placement bin, it is convenient to move and reinforce and maintain test piece in later period, while maintaining the first load to test piece, neither occupies pressure equipment, while it is convenient to move and test piece processing, it is convenient to carry out second loading, reduce test difficulty, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of load reinforcement technology for eccentrically compressed concrete columns, specifically to a test device for load reinforcement of eccentrically compressed reinforced concrete columns. Background Technology

[0002] As the main vertical load-bearing component in concrete structures, reinforced concrete columns bear the vertical loads transmitted from above. Due to adjustments in the building's function, operational errors during construction, and changes in specifications, the load-bearing capacity of concrete columns may not meet the current specifications. Their collapse can cause serious casualties and property damage. Therefore, in order to improve the safety of the structure, it is usually reinforced.

[0003] In practical engineering, due to the presence of dead loads and the demands of production activities, concrete columns are always under load when they are reinforced, meaning they are subjected to a primary load. When reinforced with strengthening materials, the strain of the reinforced column will lag behind that of the original structure under secondary loads, leading to changes in the utilization rate of the strengthening materials. Therefore, research on the reinforcement of reinforced concrete columns under load has become a key issue of concern for researchers.

[0004] If a pressure testing machine or mechanical jack is used to apply a single, constant load to a reinforced concrete column, followed by reinforcement work and curing, and then a second loading test is conducted after the curing period has elapsed, this method can simulate the actual stress conditions of the specimen requiring reinforcement. However, it occupies the testing equipment for an extended period, and is difficult to operate, costly, and inefficient. Furthermore, because the pressure testing machine consistently applies a vertical load, and the reinforcement work is performed on a test bench, the operating space for the reinforcement work is limited.

[0005] If high-early-strength concrete is used as a reinforcement material for reinforcement research, the curing time can be significantly shortened and the test efficiency can be improved. However, its mechanical properties are different from those of the reinforcement materials used in actual engineering, which makes it difficult for the test results to reflect the real reinforcement situation and thus cannot meet the actual test requirements. Utility Model Content

[0006] The purpose of this invention is to provide a test device for load reinforcement of reinforced concrete eccentrically compressed columns, thereby solving the technical problems of high difficulty and high cost in the current load reinforcement of concrete eccentrically compressed columns.

[0007] The solution of this utility model to the above-mentioned technical problems is as follows: A test device for load reinforcement of reinforced concrete eccentrically compressed columns includes a load holder, a pressure sensor, and two ball joint plates. A specimen loading chamber is disposed inside the load holder. The pressure sensor and the ball joint plates are both located within the specimen loading chamber. The two ball joint plates are respectively disposed at opposite ends of the specimen loading chamber, forming a specimen placement chamber between the two ball joint plates. The pressure sensor is located between the ball joint plates and the top of the specimen loading chamber. The load holder is used to maintain the height of the specimen placement chamber.

[0008] Further defined, the load holding member includes two support plates and multiple screws, the two support plates are spaced apart vertically, and a specimen loading chamber is formed between the two support plates, the pressure sensor is disposed between one ball joint plate and the upper support plate, and the other ball joint plate is in contact with the lower support plate; Both ends of the screw extend through the specimen loading chamber to the outer side of the corresponding support plate. Both ends of the screw are provided with locking nuts, which are in contact with the outer surface of the corresponding support plate. Multiple screw arrays are arranged around the ball joint plate.

[0009] Further specified, the number of screws is four, and the four screws are respectively set at the corresponding top corner positions of the support plate; the screws are covered with washers, and the washers are located between the lock nut and the support plate.

[0010] Further specifying, the screw includes a first screw and a second screw, which are connected by a mating nut. A small force sensor is provided on the mating nut, and the measuring end of the small force sensor passes through the mating nut and is connected to the first screw or the second screw. The indicating end of the small force sensor is located on the outside of the mating nut.

[0011] Furthermore, a pad is provided between the support plate and the pressure sensor.

[0012] Further specified, the support plate is provided with a U-shaped groove, the opening of the U-shaped groove is located on the side end face of the support plate, the U-shaped groove is sleeved on the outside of the screw, and the outer diameter of the locking nut is greater than the width of the U-shaped groove.

[0013] Further specified, the outer end face of the support plate is provided with a compression pad, the height of the compression pad is greater than the length of the screw extending to the outside of the support plate, a plurality of the screws are located on the periphery of the compression pad, and the compression pad is arranged opposite to the ball joint plate.

[0014] Further specifying, the extrusion pad includes a plurality of stacked extrusion pads.

[0015] Furthermore, a limiting baffle is provided on the ball joint plate, and the limiting baffle extends to the periphery of the specimen placement chamber.

[0016] Furthermore, both the support plate and the ball joint plate are provided with lifting rings on their periphery.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a load-holding component and a pressure sensor to maintain the height of the specimen placement chamber under the pressure of the pressure equipment, thereby achieving a primary load on the specimen in the placement chamber. This facilitates subsequent movement and reinforcement and maintenance of the specimen. While maintaining the application of the first load on the specimen, it does not occupy the pressure equipment, and it is convenient for movement and specimen handling, making it easier to perform a second loading, reducing the difficulty of the test and improving the efficiency of the test.

[0018] 2. This utility model facilitates the installation and disassembly of the screw by opening a U-shaped groove on the support plate, saving operating space; and by setting a limiting baffle at the end of the ball joint plate, it can limit the horizontal displacement of the specimen, prevent the specimen from slipping, and ensure the stability and reliability of the test.

[0019] 3. By setting small force sensors on the first and second screws, this utility model can determine the force on each screw when tightening the locking nut, and at the same time compare whether the forces on the screws on the same side are close, so as to avoid uneven load on the specimen and affect the test results. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the test device for load reinforcement of reinforced concrete eccentrically compressed columns according to this utility model; Figure 2 This is a top view of the support plate of this utility model; Figure 3 This is a cross-sectional view of the connection position between the first screw and the second screw of this utility model; In the figure, 10-load retainer; 11-support plate; 12-screw; 13-locking nut; 14-washer; 15-small force sensor; 16-butt nut; 17-U-groove; 20-pressure sensor; 21-pad; 30-ball joint plate; 31-limiting baffle; 40-compression pad; 50-lifting ring; 60-test piece. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1 refer to Figures 1-3 This utility model provides a test device for load reinforcement of reinforced concrete eccentrically compressed columns, including a load holding member 10, a pressure sensor 20, and two ball joint plates 30; a specimen loading chamber is set inside the load holding member 10, and the pressure sensor 20 and the ball joint plates 30 are both located inside the specimen loading chamber. The pressure sensor 20 is set between one ball joint plate 30 and the top of the specimen loading chamber, and the other ball joint plate 30 contacts the bottom of the specimen loading chamber. A specimen placement chamber is formed between the two ball joint plates 30 for placing the specimen 60.

[0026] In actual operation, the specimen is first placed in the specimen placement chamber, and the two ball joint plates 30 contact the upper and lower end faces of the specimen 60 respectively. Then, the hydraulic equipment is used to squeeze the load holding member 10, so that the height of the specimen loading chamber is squeezed. The pressure sensor 20 determines the force applied to the specimen 60. When the hydraulic equipment releases the squeeze, the load holding member 10 is used to maintain the height of the specimen placement chamber, thereby maintaining the compression of the specimen 60 and ensuring that the specimen 60 is always in the first load state during subsequent processing.

[0027] Specifically, the load holding member 10 includes two support plates 11 and multiple screws 12. The two support plates 11 are arranged vertically and horizontally, forming a specimen loading chamber between the two support plates 11. At this time, the pressure sensor 20 is set between the top ball joint plate 30 and the upper support plate 11, and the bottom ball joint plate 30 contacts the lower support plate 11. By pushing the support plate 11 downward, a load is applied to the specimen 60.

[0028] Both ends of the screw 12 extend through the specimen loading chamber to the outside of the corresponding support plate 11. The screw 12 is located outside the specimen placement chamber to avoid contact with the specimen and affecting the test. Both ends of the screw 12 are provided with locking nuts 13, which contact the outer surface of the corresponding support plate 11. When the pressure sensor 20 reaches the preset value after the hydraulic equipment squeezes the top support plate 11, the two locking nuts 13 cooperate with the screw 12 to limit the distance between the two support plates 11, thereby maintaining the compression state on the specimen 60, and the specimen 60 maintains the first load.

[0029] To ensure the measurement reliability of the pressure sensor 20, it is preferable to provide a pad 21 between the pressure sensor 20 and the top support plate 11. The pad 21 can be a steel plate.

[0030] Preferably, the screws 12 array is arranged around the ball joint plate 30; taking four screws 12 as an example, the four screws 12 are arranged at the four apex positions of the support plate 11.

[0031] The connection between the screw 12 and the support plate 11 can be either a sleeve or a snap-fit. For example, the support plate 11 has a connecting hole, through which the screw 12 passes, allowing the support plate 11 to slide along the screw 12 during compression. At the same time, the locking nut 13 limits the support plate 11 from sliding in the opposite direction. Preferably, the support plate 11 has a U-shaped groove 16, with the opening of the U-shaped groove 16 located on the side end face of the support plate 11. Therefore, the screw 12 extends along the length of the U-shaped groove 16, facilitating disassembly and assembly and saving operating space.

[0032] Preferably, a washer 14 is provided between the locking nut 13 and the support plate 11 to increase the contact area with the support plate 11, and the washer 14 covers the outside of the U-shaped groove 16.

[0033] To further explain, the screw 12 includes a first screw and a second screw, which are connected by a mating nut 16. A small force sensor 15 is provided on the mating nut 16. The measuring end of the small force sensor 15 passes through the mating nut 16 and is connected to the first screw or the second screw. The indicating end of the small force sensor 15 is located on the outside of the mating nut 16.

[0034] When tightening the locking nut 16, in order to ensure that the screw 12 on the same side is subjected to balanced force, a small force sensor 15 is set up to observe the force on the screw 12 in real time, so as to ensure that the first load applied to the specimen 60 meets the test requirements.

[0035] To accommodate hydraulic equipment of different sizes, it is preferable to provide a compression pad 40 on the outside of the support plate 11. The height of the compression pad 40 is greater than the length of the screw 12 extending to the outside of the support plate 11. Multiple screws 12 are located around the compression pad 40. The compression pad 40 is positioned opposite the ball joint plate 30 to avoid damage caused by contact between the end of the screw 12 and the hydraulic equipment during compression, while ensuring effective compression of the support plate 11.

[0036] The extrusion pad 40 includes multiple stacked extrusion pads, and the thickness of the extrusion pad 40 can be adjusted as needed to effectively reduce weight.

[0037] To facilitate disassembly and assembly, lifting rings 50 are preferably provided around the support plate 11, ball joint plate 30, compression shim, and pad plate 21 for easy hoisting.

[0038] To further explain, in order to ensure that the specimen 60 is stable and does not shift in the specimen placement chamber and to ensure the reliability of the test results, a limiting baffle 31 is set on the end face of the ball joint plate 30 to limit the top and bottom of the specimen 60 and prevent it from shifting before and after applying a load to the specimen 60; the limiting baffle 31 can be an angle steel.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A test device for load reinforcement of reinforced concrete eccentrically compressed columns, characterized in that, The device includes a load holder (10), a pressure sensor (20), and two ball joint plates (30). The load holder (10) has a specimen loading chamber inside. The pressure sensor (20) and the ball joint plates (30) are both located inside the specimen loading chamber. The two ball joint plates (30) are respectively located at opposite ends of the specimen loading chamber, and a specimen placement chamber is formed between the two ball joint plates (30). The pressure sensor (20) is located between the ball joint plates (30) and the top of the specimen loading chamber. The load holder (10) is used to maintain the height of the specimen placement chamber.

2. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 1, characterized in that, The load holder (10) includes two support plates (11) and multiple screws (12). The two support plates (11) are arranged vertically and horizontally, forming a specimen loading chamber between the two support plates (11). The pressure sensor (20) is arranged between one ball joint plate (30) and the upper support plate (11), and the other ball joint plate (30) is in contact with the lower support plate (11). Both ends of the screw (12) extend through the specimen loading chamber to the outside of the corresponding support plate (11). Both ends of the screw (12) are provided with locking nuts (13). The locking nuts (13) are in contact with the outer surface of the corresponding support plate (11). Multiple screws (12) are arranged in an array around the ball joint plate (30).

3. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, There are four screws (12), and the four screws (12) are respectively set at the top corner position of the support plate (11); the screws (12) are covered with washers (14), and the washers (14) are located between the locking nut (13) and the support plate (11).

4. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, The screw (12) includes a first screw and a second screw, which are connected by a mating nut (16). A small force sensor (15) is provided on the mating nut (16). The measuring end of the small force sensor (15) passes through the mating nut (16) and is connected to the first screw or the second screw. The indicating end of the small force sensor (15) is located outside the mating nut (16).

5. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, A pad (21) is provided between the support plate (11) and the pressure sensor (20).

6. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, The support plate (11) has a U-shaped groove (17) with the opening of the U-shaped groove (17) located on the side end face of the support plate (11). The U-shaped groove (17) is sleeved on the outside of the screw (12). The outer diameter of the locking nut (13) is greater than the width of the U-shaped groove (17).

7. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, The outer end face of the support plate (11) is provided with a compression pad (40). The height of the compression pad (40) is greater than the length of the screw (12) extending to the outside of the support plate (11). Multiple screws (12) are located on the periphery of the compression pad (40). The compression pad (40) is positioned opposite the ball joint plate (30).

8. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 7, characterized in that, The extrusion pad (40) includes a plurality of stacked extrusion pads.

9. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, A limiting baffle (31) is provided on the ball joint plate (30), and the limiting baffle (31) extends to the periphery of the specimen placement chamber.

10. The test apparatus for load reinforcement of reinforced concrete eccentrically compressed columns according to claim 2, characterized in that, Both the support plate (11) and the ball joint plate (30) are provided with lifting rings (50) on their periphery.

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