Device for testing mechanical property of concrete-filled steel tube structure

Abstract

The utility model discloses a concrete-filled steel tube structure mechanical property testing device, which relates to the technical field of concrete-filled steel tube testing and comprises a bottom plate, symmetrical supports fixedly connected to two sides of the bottom plate, a pressing block arranged between the symmetrical supports, a connecting mechanism arranged at the upper end of the pressing block, and an axial testing mechanism arranged on the supports. The axial testing mechanism comprises a sliding groove, a guide groove is formed in the sliding groove and slidably connected with a sliding block, a lifting mechanism is arranged at the lower end of the sliding block, one end, away from the lower pressing block, of the sliding block is fixedly connected with an air cylinder, an output shaft of the air cylinder is fixedly connected with pressing plates, and the lower pressing block is located between the symmetrical pressing plates. The device has the beneficial effects that the sliding block slides in the guide groove, so that the sliding block drives the pressing plate to be coaxial with the concrete-filled steel tube, the air cylinder drives the pressing plate to approach the concrete-filled steel tube for centered limiting, and then the air cylinder drives the pressing plate to extrude the concrete-filled steel tube for axial pressurization, so that a comprehensive performance test is carried out on the concrete-filled steel tube.

Description

Technical Field

[0001] This utility model relates to the field of steel tube concrete testing technology, and in particular to a testing device for the mechanical properties of steel tube concrete structures. Background Technology

[0002] Concrete-filled steel tubes are a new type of composite structure formed by pouring concrete into the interior of a steel tube. They combine the advantages of steel and concrete and are commonly used in bridge construction, high-rise buildings, and factory construction to effectively enhance the load-bearing capacity and improve the safety of buildings.

[0003] In the prior art, Chinese Patent Publication No. CN220708912U discloses a mechanical performance testing device for steel-concrete composite structures. This patent uses the free end pressure surfaces of the first and second load mechanisms to press onto the steel-concrete composite structure. The first and second load mechanisms apply pressure to the upper and lower sides of the steel-concrete composite structure in opposite or alternating directions.

[0004] Existing mechanical property testing equipment typically only applies radial pressure to concrete-filled steel tubes, but concrete-filled steel tubes are usually installed vertically during use, meaning they are subjected to axial force, necessitating axial pressure testing. Utility Model Content

[0005] The purpose of this invention is to provide a testing device for the mechanical properties of steel-concrete composite structures in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A mechanical performance testing device for steel-concrete composite structures includes a base plate, symmetrical supports fixedly connected to both sides of the base plate, a pressure block between the symmetrical supports, a connecting mechanism at the upper end of the pressure block, and an axial testing mechanism on the supports.

[0008] The axial testing mechanism includes a sliding groove, which is located at the lower end of the support. A guide groove is provided inside the sliding groove, and a sliding block is slidably connected to the guide groove. A lifting mechanism is provided at the lower end of the sliding block. A cylinder is fixedly connected to the end of the sliding block away from the lower pressure block. A pressure plate is fixedly connected to the output shaft of the cylinder. The lower pressure block is located between symmetrical pressure plates.

[0009] Preferably, the lifting mechanism includes a groove, which is formed at the lower end of the sliding groove. An electric telescopic rod is fixedly installed in the groove, and the upper end of the electric telescopic rod is fixedly connected to the sliding block.

[0010] Preferably, the connecting mechanism includes a lifting plate, a lifting screw is rotatably connected inside the bracket, the lifting screw is threadedly connected to the lifting plate, a lower pressure block is fixedly connected to the lower end of the lifting plate, and a lower pressure mechanism is provided between the lifting plate and the bracket.

[0011] Preferably, the pressing mechanism includes a fixed housing, which is fixed to the upper end of the bracket. A lifting motor is fixedly connected to the upper end of the fixed housing, and the output shaft of the lifting motor is fixedly connected to the lifting screw.

[0012] Preferably, pulleys are fixedly connected to the upper ends of the lifting screws on both sides, and belts are connected to the pulleys, with the belts located inside the fixed housing.

[0013] Preferably, a through groove is provided on the base plate, and a bidirectional lead screw is rotatably connected in the through groove. Symmetrical limit blocks are threaded to the front and rear of the bidirectional lead screw. A power motor is fixedly connected to the front end of the base plate, and the output shaft of the power motor is fixedly connected to the bidirectional lead screw.

[0014] Preferably, symmetrical support blocks are fixedly installed on both sides of the base plate, and the power motor is located between the symmetrical support blocks.

[0015] The beneficial effects are as follows: the sliding block slides in the guide groove, causing the sliding block to drive the pressure plate to be coaxial with the steel-concrete composite pipe. The cylinder drives the pressure plate to approach the steel-concrete composite pipe for centering and limiting. Then the cylinder drives the pressure plate to squeeze the steel-concrete composite pipe for axial pressure, thereby conducting a comprehensive performance test on the steel-concrete composite pipe.

[0016] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a perspective view of the mechanical performance testing device for steel-concrete composite structures described in this utility model;

[0019] Figure 2 This is a front view of the mechanical performance testing device for steel-concrete composite structures described in this utility model;

[0020] Figure 3 This is a cross-sectional view of the mechanical performance testing device for steel-concrete composite structures described in this utility model;

[0021] Figure 4 yes Figure 3 Enlarged view of point A.

[0022] The reference numerals in the attached drawings are explained as follows: 101, base plate; 102, through groove; 103, bracket; 201, fixed shell; 202, lifting motor; 203, lifting screw; 301, lifting plate; 302, lower pressure block; 401, sliding groove; 402, guide groove; 403, sliding block; 404, cylinder; 405, pressure plate; 501, groove; 502, electric telescopic rod; 601, two-way screw; 602, limit block; 603, power motor; 7, support block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this utility model.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, a mechanical performance testing device for steel-concrete composite structures includes a base plate 101, symmetrical supports 103 fixedly connected to both sides of the base plate 101, a lower pressure block 302 provided between the symmetrical supports 103, a connecting mechanism provided at the upper end of the lower pressure block 302, and an axial testing mechanism provided on the supports 103.

[0027] The axial testing mechanism includes a sliding groove 401, which is located at the lower end of the support 103. A guide groove 402 is provided inside the sliding groove 401, and a sliding block 403 is slidably connected to the guide groove 402. A lifting mechanism is provided at the lower end of the sliding block 403. A cylinder 404 is fixedly connected to the end of the sliding block 403 away from the lower pressure block 302. A pressure plate 405 is fixedly connected to the output shaft of the cylinder 404. The lower pressure block 302 is located between symmetrical pressure plates 405. In use, the lifting mechanism drives the sliding block 403 to slide in the guide groove 402, so that the sliding block 403 drives the pressure plate 405 to be coaxial with the steel-concrete composite tube. The cylinder 404 drives the pressure plate 405 to approach the steel-concrete composite tube for centering and limiting. Then, the cylinder 404 drives the pressure plate 405 to squeeze the steel-concrete composite tube for axial pressure, thereby conducting a comprehensive performance test on the steel-concrete composite tube.

[0028] The lifting mechanism includes a groove 501, which is located at the lower end of the sliding groove 401. An electric telescopic rod 502 is fixedly installed in the groove 501. The upper end of the electric telescopic rod 502 is fixedly connected to the sliding block 403. The electric telescopic rod 502 drives the sliding block 403 to slide in the sliding groove 401.

[0029] The connecting mechanism includes a lifting plate 301, a lifting screw 203 rotatably connected inside the bracket 103, the lifting screw 203 being threadedly connected to the lifting plate 301, and a lower pressure block 302 fixedly connected to the lower end of the lifting plate 301. A lower pressure mechanism is provided between the lifting plate 301 and the bracket 103. When the lifting screw 203 rotates, it drives the lifting plate 301 to move along the axial direction of the lifting screw 203, so that the lifting plate 301 drives the lower pressure block 302 to squeeze the steel pipe concrete.

[0030] The pressing mechanism includes a fixed housing 201, which is fixed to the upper end of the bracket 103. A lifting motor 202 is fixedly connected to the upper end of the fixed housing 201, and the output shaft of the lifting motor 202 is fixedly connected to the lifting screw 203.

[0031] Both sides of the lifting screw 203 are fixedly connected to pulleys at their upper ends, and belts are connected to the pulleys. The belts are located inside the fixed housing 201. The lifting motor 202 drives the lifting screws 203 on both sides to rotate synchronously through the belts.

[0032] A through groove 102 is provided on the base plate 101. A bidirectional lead screw 601 is rotatably connected in the through groove 102. Symmetrical limiting blocks 602 are threaded to the front and rear of the bidirectional lead screw 601. A power motor 603 is fixedly connected to the front end of the base plate 101. The output shaft of the power motor 603 is fixedly connected to the bidirectional lead screw 601. The power motor 603 drives the bidirectional lead screw 601 to rotate, so that the limiting blocks 602 move towards each other on the bidirectional lead screw 601. Then, the steel pipe concrete is hoisted between the symmetrical limiting blocks 602, so that the axis of the steel pipe concrete is horizontal with the ground. Thus, the symmetrical limiting blocks 602 abut against the lower side of the steel pipe concrete to limit its movement.

[0033] Symmetrical support blocks 7 are fixedly installed on both sides of the base plate 101, and the power motor 603 is located between the symmetrical support blocks 7.

[0034] Working principle: During use, the power motor 603 drives the bidirectional lead screw 601 to rotate, causing the limiting blocks 602 to move towards each other on the bidirectional lead screw 601. Then, the steel-concrete pipe is hoisted between the symmetrical limiting blocks 602, making the axis of the steel-concrete pipe horizontal with the ground. The symmetrical limiting blocks 602 then abut against the lower part of the steel-concrete pipe, limiting its position so that the steel-concrete pipe is directly below the lower pressure block 302. Subsequently, the electric telescopic rod 502 drives the sliding block 403 to slide within the sliding groove 401, and then drives the sliding block 403 to slide within the guide groove 402, causing the sliding block 403... The cylinder 404 drives the pressure plate 405 to be coaxial with the steel-concrete composite pipe, and drives the pressure plate 405 to move closer to the steel-concrete composite pipe for centering and limiting. Then, the cylinder 404 drives the pressure plate 405 to squeeze the steel-concrete composite pipe for axial pressure, thereby conducting a comprehensive performance test on the steel-concrete composite pipe. At the same time, the lifting motor 202 drives the lifting screws 203 on both sides to rotate synchronously through the belt. When the lifting screws 203 rotate, they drive the lifting plate 301 to move axially along the lifting screws 203, so that the lifting plate 301 drives the lower pressure block 302 to squeeze the steel-concrete composite pipe, thereby simultaneously applying axial and radial pressure to the steel-concrete composite pipe.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mechanical performance testing device for steel-concrete composite structures, comprising a base plate (101), wherein symmetrical supports (103) are fixedly connected to both sides of the base plate (101), characterized in that: A pressing block (302) is provided between the symmetrical supports (103), and a connecting mechanism is provided at the upper end of the pressing block (302). An axial testing mechanism is provided on the supports (103). The axial testing mechanism includes a sliding groove (401) which is formed at the lower end of the bracket (103). A guide groove (402) is formed in the sliding groove (401). A sliding block (403) is slidably connected to the guide groove (402). A lifting mechanism is provided at the lower end of the sliding block (403). A cylinder (404) is fixedly connected to the end of the sliding block (403) away from the lower pressure block (302). A pressure plate (405) is fixedly connected to the output shaft of the cylinder (404). The lower pressure block (302) is located between the symmetrical pressure plates (405).

2. The mechanical performance testing device for steel-concrete composite structures according to claim 1, characterized in that: The lifting mechanism includes a groove (501), which is formed at the lower end of the sliding groove (401). An electric telescopic rod (502) is fixedly installed in the groove (501), and the upper end of the electric telescopic rod (502) is fixedly connected to the sliding block (403).

3. The mechanical performance testing device for steel-concrete composite structures according to claim 1, characterized in that: The connecting mechanism includes a lifting plate (301), a lifting screw (203) is rotatably connected inside the bracket (103), the lifting screw (203) is threadedly connected to the lifting plate (301), the pressing block (302) is fixedly connected to the lower end of the lifting plate (301), and a pressing mechanism is provided between the lifting plate (301) and the bracket (103).

4. The mechanical performance testing device for steel-concrete composite structures according to claim 3, characterized in that: The pressing mechanism includes a fixed shell (201), which is fixed to the upper end of the bracket (103). A lifting motor (202) is fixedly connected to the upper end of the fixed shell (201), and the output shaft of the lifting motor (202) is fixedly connected to the lifting screw (203).

5. The mechanical performance testing device for steel-concrete composite structures according to claim 4, characterized in that: Both sides of the lifting screw (203) are fixedly connected to pulleys at their upper ends, and belts are connected to the pulleys. The belts are located inside the fixed shell (201).

6. The mechanical performance testing device for steel-concrete composite structures according to claim 1, characterized in that: A through groove (102) is provided on the base plate (101), and a bidirectional lead screw (601) is rotatably connected in the through groove (102). The bidirectional lead screw (601) is threaded with symmetrical limiting blocks (602) at the front and rear. A power motor (603) is fixedly connected to the front end of the base plate (101), and the output shaft of the power motor (603) is fixedly connected to the bidirectional lead screw (601).

7. The mechanical performance testing device for steel-concrete composite structures according to claim 6, characterized in that: Symmetrical support blocks (7) are fixedly installed on both sides of the base plate (101), and the power motor (603) is located between the symmetrical support blocks (7).

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