Reinforcing steel bar pulling-out testing device for anti-seismic property test of ultra-high performance concrete column

Abstract

The utility model belongs to the technical field of detection, particularly relates to a reinforcing steel bar pulling-out testing device for an anti-seismic property test of an ultra-high performance concrete column, and provides the following scheme aiming at the problems that an existing traditional reinforcing steel bar pulling-out testing device is complicated in structure, difficult to operate and unstable in concrete column fixing and affects the testing accuracy. A placing table is fixedly arranged at the top of the base, and sliding rods are symmetrically and fixedly arranged at the top of the placing table, the fixing assembly is matched with the electric air cylinder, so that the pressing block moves up and down, the concrete column is fixed, the concrete column is prevented from shaking, and the testing accuracy is improved; sliding connection and threaded fixation are integrated in the clamp design, the steel bars are clamped, maintenance and replacement are convenient, the use flexibility is enhanced, a servo motor is adopted in the driving assembly to drive a lead screw, a clamp base is accurately controlled to move up and down, accurate steel bar pulling-out operation is achieved, and the testing precision and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection technical field especially relates to the steel bar pull -out test device for the seismic performance test of super high performance concrete column. BACKGROUND

[0002] In the field of building structure, super high performance concrete (UHPC) is concerned because of its excellent mechanical properties and durability, in order to evaluate the seismic performance of UHPC column under the action of earthquake, the pull -out test of embedded steel bar is an important means to reflect the bonding performance between steel bar and UHPC.

[0003] Traditional steel bar pull -out test device is often complex in structure, inconvenient to operate, and has many deficiencies in fixing concrete column and driving steel bar pull -out, such as some devices cannot provide enough stability when fixing concrete column, resulting in inaccurate test results, therefore we propose the steel bar pull -out test device for the seismic performance test of super high performance concrete column to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a steel bar pull -out test device for the seismic performance test of super high performance concrete column, which is used to solve the problems of complex structure, difficult operation and unstable fixation of concrete column in the prior art, and improves the accuracy of test.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The steel bar pull -out test device for the seismic performance test of super high performance concrete column comprises a base, a placing table is fixedly arranged at the top of the base, two slide rods are symmetrically fixedly arranged at the top of the placing table, one compression block is slidably connected to the outer wall of the two slide rods, a U-shaped frame is fixedly arranged at the top of the compression block, a sliding groove is formed in the inner wall of each side of the U-shaped frame, and one clamp seat is slidably connected in the two sliding grooves.

[0007] The fixing assembly is arranged on the base and is used to drive the compression block to move up and down to fix the concrete column to be tested.

[0008] The driving assembly is arranged on the U-shaped frame and is used to drive the clamp seat to move up and down to realize the pull -out operation of the steel bar.

[0009] In a possible design, the clamp comprises a first clamp and a second clamp, one side of the clamp seat is provided with a mounting groove, the first clamp and the second clamp are located inside the mounting groove, two limiting blocks are symmetrically arranged on the inner walls of the two sides of the mounting groove, limiting grooves corresponding to the limiting blocks are formed on the two sides of the first clamp and the second clamp, the limiting grooves are in sliding connection with the corresponding limiting blocks, the side, where the first clamp and the second clamp are close to each other, of each of the first clamp and the second clamp is provided with a threaded fixing groove, two threaded holes are symmetrically arranged on one side of the clamp seat, and fixed screws are threadedly connected in the two threaded holes, the two fixed screws penetrate through the second clamp and are in sliding connection with the second clamp, the two fixed screws drive the second clamp to move in the mounting groove, and when the two fixed screws are tightened, the second clamp moves towards the first clamp, so that the reinforcing steel bars in the fixing groove between the second clamp and the first clamp are fixed.

[0010] In a possible design, the fixing assembly comprises two electric cylinders, the two electric cylinders are symmetrically arranged on the top of the base, and the output ends of the two electric cylinders are fixedly connected with the bottom of the pressing block; the pressing block is driven by the two electric cylinders to move up and down, so that the concrete column placed on the top of the placing table is pressed and fixed.

[0011] In a possible design, the top of the placing table is provided with an anti-skid rough surface, and the bottom of the pressing block is provided with a U-shaped rubber pad; the U-shaped pad and the rough surface on the top of the placing table are arranged to prevent the concrete column from sliding during the test.

[0012] In a possible design, the driving assembly comprises two lead screws, the two lead screws are rotatably arranged on the top of the pressing block, the top ends of the two lead screws penetrate through the U-shaped frame and extend above the U-shaped frame, the two lead screws are located in corresponding sliding grooves, and the two lead screws are threadedly connected with the clamp seat.

[0013] In a possible design, the top of the clamp seat is fixedly provided with a mounting frame, the bottom of the mounting frame is fixedly connected with a laser emitter, and the emission end of the laser emitter faces downward, so as to facilitate positioning of the position of the reinforcing steel bar to be pulled out on the concrete column.

[0014] In the application, first, the concrete column to be tested is placed on the placing table on the top of the base, the top of the placing table is provided with an anti-skid rough surface to increase the friction between the placing table and the concrete column and prevent the concrete column from sliding during the test.

[0015] Next, the fixed assembly is started, which includes two electric cylinders symmetrically arranged on the top of the base, the output end of the electric cylinder is fixedly connected with the bottom of the pressing block, by controlling the extension and contraction of the electric cylinder, the pressing block can be driven to move up and down, when the pressing block moves downward, the rubber material U-shaped gasket at the bottom thereof is in close contact with and presses the top of the concrete column, thereby fixing the concrete column, the U-shaped gasket not only increases the stability of the contact, but also effectively prevents the damage of the concrete column during the test;

[0016] Next, the driving assembly is started to drive the clamp seat to move up and down, so that the top end of the steel bar to be pulled out is located in the clamp, and then the clamp is clamped, wherein the driving assembly includes two lead screws rotatably arranged on the top of the pressing block, and two servo motors fixedly arranged on the top of the U-shaped frame, the top end of the lead screw penetrates through the U-shaped frame and extends above the U-shaped frame, and is threadedly connected with the clamp seat, when the servo motor is started, the output end of the servo motor drives the lead screw to rotate, since the lead screw is threadedly connected with the clamp seat, the rotation of the lead screw drives the clamp seat to move up and down in the sliding groove of the U-shaped frame;

[0017] The clamp includes a first clamp and a second clamp, which are located inside the mounting groove of the clamp seat, the inner walls on both sides of the mounting groove are symmetrically provided with two limiting blocks, the two sides of the first clamp and the second clamp are provided with limiting grooves corresponding to the limiting blocks, and the limiting grooves are in sliding connection with the corresponding limiting blocks, so that the first clamp and the second clamp can slide in the mounting groove, which is convenient for disassembly, in use, first, the first clamp is arranged in the mounting groove through the limiting groove, then the second clamp is also arranged in the mounting groove through the limiting groove, and two fixed screws threadedly connected with the threaded holes are screwed, since the two fixed screws penetrate through the second clamp, the rotation of the fixed screw drives the second clamp to move towards the first clamp, so as to fix the steel bar to be pulled out between the first clamp and the second clamp;

[0018] Finally, by controlling the rotation direction and speed of the servo motor, the moving direction and speed of the clamp seat can be accurately controlled, so as to realize the accurate pulling out operation of the steel bar, during the pulling out process, the indexes such as the pulling out force, speed of the steel bar and the deformation of the concrete column can be observed and recorded, so as to evaluate the bonding performance between the test steel bar and the UHPC;

[0019] In addition, the device is also provided with a laser emitter, which is fixedly installed on the mounting frame on the top of the clamp seat, and the emission end is downward, before the test, the laser emitter can be opened to position the position of the steel bar to be pulled out on the concrete column through the laser beam, so as to ensure that the steel bar is located between the first clamp and the second clamp, and the clamp can clamp the steel bar.

[0020] Beneficial effects: in the utility model, the steel bar pull-out testing device for the super high performance concrete column seismic performance test, through the fixed assembly, the electric cylinder is used to drive the compression block to move up and down, realizes the stable fixation to the concrete column, effectively avoids the shaking in the testing process, improves the accuracy of the testing result;

[0021] In the utility model, the steel bar pull-out testing device for the super high performance concrete column seismic performance test, the design of the clamp adopts the sliding connection and the threaded fixing mode, not only realizes the clamping fixation to the steel bar, but also is convenient to disassemble, maintains and replaces, improves the practicality and the flexibility of the device;

[0022] In the utility model, the steel bar pull-out testing device for the super high performance concrete column seismic performance test, the driving assembly adopts the mode that the servo motor drives the lead screw, realizes the accurate control to the up and down movement of the clamp seat, thereby realizes the accurate steel bar pull-out operation, improves the accuracy and the reliability of the testing;

[0023] The utility model discloses a fixed assembly and electric cylinder cooperate, make compression block move up and down, and the concrete column is fixed firmly, prevents shaking, promotes the accuracy of testing, and the clamp design fuses sliding connection and screw fixing, and both clamps steel bar and is convenient to maintain and replace, and the use flexibility is strengthened, and driving assembly adopts servo motor drive screw, and the clamp seat moves up and down accurately, realizes accurate steel bar pull-out operation, improves testing accuracy and reliability. DRAWINGS

[0024] Figure 1 It is three-dimensional structure schematic drawing of the steel bar pull-out testing device for the super high performance concrete column seismic performance test that the utility model proposes;

[0025] Figure 2 It is three-dimensional structure schematic drawing of the U type frame of the steel bar pull-out testing device for the super high performance concrete column seismic performance test that the utility model proposes;

[0026] Figure 3 It is explosion three-dimensional structure schematic drawing of the clamp seat of the steel bar pull-out testing device for the super high performance concrete column seismic performance test that the utility model proposes;

[0027] Figure 4 It is three-dimensional structure schematic drawing of the compression block of the steel bar pull-out testing device for the super high performance concrete column seismic performance test that the utility model proposes;

[0028] Figure 5 It is three-dimensional structure schematic drawing of the mounting frame of the steel bar pull-out testing device for the super high performance concrete column seismic performance test that the utility model proposes.

[0029] In the figure: 1, base; 2, placing table; 3, slide bar; 4, compression block; 5, U-shaped frame; 6, clamp seat; 601, mounting groove; 602, threaded hole; 7, electric cylinder; 8, lead screw; 9, servo motor; 10, limit block; 11, first clamp; 12, second clamp; 13, fixed screw; 14, U-shaped spacer; 15, mounting frame; 16, laser emitter. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0031] Embodiment 1: Refer to Figures 1-5 A steel bar pulling-out testing device, comprising a base 1, a placing table 2 is fixedly arranged on the top of the base 1, and two slide bars 3 are symmetrically and fixedly arranged on the top of the placing table 2. The outer walls of the two slide bars 3 are slidably connected with the same compression block 4, and the compression block 4 can slide up and down along the slide bars 3. The top of the compression block 4 is fixedly provided with a U-shaped frame 5, the inner walls of the two sides of the U-shaped frame 5 close to each other are provided with sliding grooves, and the same clamp seat 6 is slidably connected in the two sliding grooves, and the clamp seat 6 can slide up and down in the sliding grooves of the U-shaped frame 5. The clamp seat 6 is provided with clamps for clamping the steel bar to be pulled out.

[0032] In order to realize the fixation of the concrete column to be tested, a fixing assembly is arranged. The fixing assembly comprises two electric cylinders 7, the two electric cylinders 7 are symmetrically arranged on the top of the base 1, and the output ends of the two electric cylinders 7 are fixedly connected with the bottom of the compression block 4. Through the extension and retraction movement of the two electric cylinders 7, the compression block 4 can be driven to move up and down, so as to tightly fix the concrete column placed on the top of the placing table 2.

[0033] In order to realize the pulling-out operation of the steel bar, a driving assembly is arranged. The driving assembly is arranged on the U-shaped frame 5 and comprises two lead screws 8 and two servo motors 9. The two lead screws 8 are rotatably arranged on the top of the compression block 4 and extend through the U-shaped frame 5 to above the U-shaped frame 5. The two lead screws 8 are located in the corresponding sliding grooves and are threadedly connected with the clamp seat 6. The two servo motors 9 are fixedly arranged on the top of the U-shaped frame 5, and the output ends thereof are fixedly connected with the corresponding lead screws 8. Through the driving of the servo motor 9, the lead screw 8 can be driven to rotate, thereby driving the clamp seat 6 to move up and down in the sliding groove of the U-shaped frame 5, and realizing the pulling-out operation of the steel bar.

[0034] The specific structure of the clamp is that: one side of the clamp base 6 is provided with a mounting groove 601, and the first clamp 11 and the second clamp 12 are arranged in the mounting groove 601. Two limiting blocks 10 are symmetrically arranged on the inner walls of the two sides of the mounting groove 601, limiting grooves corresponding to the limiting blocks 10 are arranged on the two sides of the first clamp 11 and the second clamp 12, and the limiting grooves are in sliding connection with the corresponding limiting blocks 10. The side, where the first clamp 11 and the second clamp 12 are close to each other, is provided with a fixed groove with a thread. The clamp base 6 is symmetrically provided with two threaded holes 602 on one side, and the two threaded holes 602 are in threaded connection with fixed screws 13. The two fixed screws 13 penetrate through the second clamp 12 and are in sliding connection with the second clamp 12. By rotating the two fixed screws 13, the second clamp 12 can be driven to move in the mounting groove 601 towards the first clamp 11, so that the reinforcing steel bars in the fixed grooves between the second clamp 12 and the first clamp 11 are clamped and fixed.

[0035] In order to improve the stability of the concrete column during the test, the top of the placing table 2 is provided with an anti-skid rough surface, and the bottom of the pressing block 4 is provided with a U-shaped pad 14 made of rubber. The U-shaped pad 14 and the rough surface on the top of the placing table 2 can increase the friction between them and the concrete column, preventing the concrete column from sliding during the test and affecting the test results.

[0036] The application can be used in the technical field of detection, and can also be used in other fields applicable to the application.

[0037] Embodiment 2: Reference Figures 2-5 On the basis of embodiment one, the steel bar pull-out test device for the seismic performance test of the ultra-high performance concrete column is improved, and in addition, in order to facilitate positioning of the position of the steel bar to be pulled out on the concrete column, a mounting frame 15 is fixedly arranged on the top of the clamp base 6, and a laser emitter 16 is fixedly connected to the bottom of the mounting frame 15. The emitting end of the laser emitter 16 is downward, and can emit a laser beam to irradiate on the position of the steel bar to be pulled out, so as to facilitate the operator to quickly and accurately position the position of the steel bar.

[0038] However, as known by those skilled in the art, the working principle and wiring method of the servo motor 9 are common, and they all belong to conventional means or common knowledge, which will not be described here again, and those skilled in the art can make any selection or arrangement according to their needs or convenience.

[0039] The above is only a preferred specific implementation manner of the application, but the protection scope of the application is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the application concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A reinforced concrete column anti-seismic performance test steel bar pull-out testing device, comprising a base (1), a placement table (2) is fixedly arranged on the top of the base (1), and slide rods (3) are symmetrically and fixedly arranged on the top of the placement table (2), characterized in that, Wherein, The outer wall of two sliding rods (3) is slidably connected with the same pressing block (4), the top of the pressing block (4) is fixedly provided with a U-shaped frame (5), the inner walls of the two sides of the U-shaped frame (5) are both provided with a sliding groove, and the same clamp seat (6) is slidably connected in the two sliding grooves. The fixing assembly is arranged on the base (1) and is used for driving the pressing block (4) to move up and down to fix the concrete column to be tested. The driving assembly is arranged on the U-shaped frame (5) and is used for driving the clamp seat (6) to move up and down to realize the steel bar pulling-out operation.

2. The steel bar pull-out testing device for the seismic performance test of the ultra-high performance concrete column according to claim 1, characterized in that, The clamp comprises a first clamp (11) and a second clamp (12), one side of the clamp seat (6) is provided with a mounting groove (601), the first clamp (11) and the second clamp (12) are both located in the mounting groove (601), the two inner walls of the mounting groove (601) are both symmetrically provided with two limiting blocks (10), the two sides of the first clamp (11) and the second clamp (12) are both provided with limiting grooves corresponding to the limiting blocks (10), the limiting grooves are slidably connected with the corresponding limiting blocks (10), the side, which is close to each other, of the first clamp (11) and the second clamp (12) is provided with a fixed groove with a screw thread, one side of the clamp seat (6) is symmetrically provided with two threaded holes (602), and two fixed screws (13) are threadedly connected in the two threaded holes (602), and the two fixed screws (13) are both rotationally penetrated through the second clamp (12).

3. The steel bar pull-out testing device for the seismic performance test of the ultra-high performance concrete column according to claim 1, characterized in that, The fixing assembly comprises two electric cylinders (7), the two electric cylinders (7) are symmetrically arranged on the top of the base (1), and the output ends of the two electric cylinders (7) are both fixedly connected with the bottom of the pressing block (4).

4. The steel bar pull-out testing device for the seismic performance test of the ultra-high performance concrete column according to claim 3, characterized in that, The top of the placing table (2) is provided with an anti-skid rough surface, and the bottom of the pressing block (4) is provided with a U-shaped gasket (14) made of rubber.

5. The steel bar pull-out testing device for the seismic performance test of ultra-high performance concrete columns according to claim 1, characterized in that, The driving assembly comprises two lead screws (8), the two lead screws (8) are rotationally arranged on the top of the pressing block (4), the top ends of the two lead screws (8) are both penetrated through the U-shaped frame (5) and extend above the U-shaped frame (5), the two lead screws (8) are located in the corresponding sliding grooves, and the two lead screws (8) are both threadedly penetrated through the clamp seat (6). The top of the U-shaped frame (5) is fixedly provided with two servo motors (9), and the output ends of the two servo motors (9) are respectively fixedly connected with the corresponding lead screws (8).

6. The steel bar pull-out testing device for the seismic performance test of ultra-high performance concrete columns according to claim 2, characterized in that, The top of the clamp seat (6) is fixedly provided with a mounting frame (15), the bottom of the mounting frame (15) is fixedly connected with a laser emitter (16), and the emission end of the laser emitter (16) faces downward.

Images