Tension fatigue performance testing device for studs in combined bridge deck slab structure

Abstract

The utility model discloses a tension fatigue performance testing device of a stud in a combined bridge deck structure, which belongs to the field of tension fatigue performance testing of the stud and comprises a test board, a stud body, four supporting legs mounted on the lower surface of the test board and a U-shaped supporting frame mounted on the upper surface of the test board. According to the device for testing the tension fatigue performance of the studs in the combined bridge deck structure, the electric push rod, the pinch plate, the bidirectional threaded rod and the stretching frame are arranged, the electric push rod is supported under the action of the supporting frame, and the stretching frame is driven to move through rotation of the bidirectional threaded rod and movement of the two sliding seats by combining the effect of fixing the bridge deck main body by the pinch plate; the top end of the stud main body is clamped and buckled, then the electric push rod is started to carry out stretching test work on the stud, the top end of the stud main body does not slip in cooperation with the semicircular stretching frame, the stud main body can be well tested, and use is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of tensile fatigue performance testing of studs, specifically relating to a device for testing the tensile fatigue performance of studs in a composite bridge deck structure. Background Technology

[0002] Studs (cylindrical head welding studs for arc stud welding) are currently the most commonly used connecting parts in the field of engineering and construction. They are well known to engineering technicians for their convenient construction and low cost. At present, research on studs mainly focuses on their use as shear-resistant connecting parts, analyzing their shear resistance and failure mechanism. However, the tensile properties are only limited to the studs themselves, ignoring their specific working environment, that is, the studs usually interact with concrete.

[0003] Existing stud tensile fatigue performance tests are not adequate for testing studs, leading to inaccurate test results or studs falling off during tensile testing, which renders the testing device unusable and inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a device for testing the tensile fatigue performance of studs in a composite bridge deck structure, in order to solve the problems mentioned in the background art that the existing stud tensile fatigue performance test cannot effectively test the studs, resulting in inaccurate test results or studs falling off during tensile testing, which in turn prevents the testing device from continuing the test and makes it inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a test platform, a stud body, four support legs mounted on the lower surface of the test platform, and a U-shaped support frame mounted on the upper surface of the test platform. An electric push rod is mounted on the lower surface of the horizontal portion of the support frame. A U-shaped bracket is mounted on the output shaft end of the electric push rod. A bidirectional threaded rod is rotatably mounted on the bracket. One end of the bidirectional threaded rod extends through the bracket and is fitted with an operating plate. Slides are threaded onto both ends of the bidirectional threaded rod. Semi-circular tension frames are mounted on opposite sides of the two slides. A semi-arc groove is formed on the lower surface of the tension frame. Two L-shaped buckles are hinged to the upper surface of the test platform. A bridge panel body is positioned between the two buckles. The stud body is fixed to the bridge panel body. Mounting components are provided on the buckles.

[0006] The above solution utilizes an electric push rod, a buckle plate, a bidirectional threaded rod, and a tension frame. The electric push rod is supported by a support frame, and the buckle plate secures the bridge deck body. The rotation of the bidirectional threaded rod causes the two sliding blocks to move, which in turn moves the tension frame, clamping the top of the stud body. Then, the electric push rod is activated to perform a tensile test on the stud. The semi-circular shape of the tension frame prevents the top of the stud body from slipping, allowing for effective testing and convenient use.

[0007] In the above scheme, it should be noted that the electric push rod is electrically connected to an external power source.

[0008] In a preferred embodiment, the mounting assembly includes two sets of Z-shaped mounting plates, with two mounting plates in each set. The two mounting plates in the same set are respectively mounted on the front and rear sides of the same side buckle plate. Bolts are threaded onto the mounting plates, and the tail ends of the bolts are threadedly connected to the test bench.

[0009] By adopting the above scheme, by setting up a mounting plate and bolts, the mounting plate is fixed by the bolts, and the buckle plate is fixed in place. This makes it easy to fix the main body of the bridge deck on the test platform, and also makes it easy to loosen the bolts and remove the main body of the bridge deck at any time.

[0010] In a preferred embodiment, a first fixing plate is installed on both the front and rear sides of the bracket, and a second fixing plate is installed on both the front and rear sides of the slide. A telescopic rod is installed on the first fixing plate, and the telescopic shaft of the telescopic rod is fixedly connected to the second fixing plate on the same side.

[0011] Using the above scheme, a telescopic rod is set up, and the telescopic rod is supported and fixed by the first fixed plate. Combined with the function of the second fixed plate, it is indirectly connected to the slide plate. The extension of the telescopic rod provides limiting support for the slide seat.

[0012] In a preferred embodiment, a base plate is installed between the four support legs. A collection frame with an opening on the upper surface of the base plate is provided. Two slots are formed on the upper surface of the base plate, and a card plate is provided in the slot. The collection frame is installed on the upper surface of the card plate, and a handle is installed on the front side of the collection frame.

[0013] The above solution involves setting up a base plate, a collection frame, and a clamping plate. The base plate supports the collection frame, and the collection frame facilitates the centralized collection of unqualified studs, allowing for later centralized processing of these unqualified studs. The clamping plate slides within its slot to hold the collection frame in place.

[0014] In a preferred embodiment, the upper surface of the test platform has a channel, and the lower surface of the test platform is equipped with a support plate. Two slide rods are slidably installed on the support plate. The bottom ends of the two slide rods are installed on the same connecting plate. Springs are sleeved on the slide rods, with their two ends fixedly connected to the connecting plate and the support plate respectively. The top ends of the two slide rods are equipped with the same top plate, which is located inside the channel.

[0015] By adopting the above scheme, a support plate, a sliding rod, and a spring are set up. The support rod supports the sliding rod, and combined with the elasticity of the top plate and the spring, the main body of the bridge deck with different thicknesses is pushed upward, so that the main body of the bridge deck is always in contact with the buckle plate, thus expanding the applicable range of the bridge deck.

[0016] In a preferred embodiment, two placement frames are installed on the lower surface of the test platform, with the openings of the two placement frames arranged opposite to each other, and the two placement frames are respectively located on the left and right sides of the channel.

[0017] By adopting the above solution and setting up a placement frame, the staff can conveniently store the weight blocks or heavy objects in the placement frame, thereby improving the stability of the test platform and preventing the test platform from shaking during the tensile test of the main body of the stud, thus improving the stability of the test platform.

[0018] In a preferred embodiment, a vertical plate is installed on the upper surface of the base plate, a through hole is provided on the vertical plate, a fixing rod is provided at the through hole, and a fixing groove is provided on the left side of the collection frame to cooperate with the fixing rod, with one end of the fixing rod extending into the fixing groove.

[0019] By adopting the above scheme, a vertical plate and a fixing rod are set up. The vertical plate supports and fixes the fixing rod. Combined with the fixing groove on the collection frame, the fixing rod extends into the fixing groove at one end to fix the collection frame. This fixes the collection frame stably on the base plate and prevents the collection frame from shaking during the operation of the test bench.

[0020] In a preferred embodiment, a pull plate is installed at the left end of the fixing rod, and a spring is sleeved on the fixing rod with its two ends fixedly connected to the vertical plate and the pull plate respectively.

[0021] By adopting the above solution, a pull plate and a second spring are installed. The pull plate allows workers to move the fixed rod quickly and easily. Combined with the elasticity of the second spring, the fixed rod will not fall or detach from the vertical plate, thus improving the firmness and stability of the fixed rod. The fixed rod can also be reset by the elasticity of the second spring.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The tensile fatigue performance testing device for studs in this composite bridge deck structure consists of an electric push rod, a buckle plate, a bidirectional threaded rod, and a tension frame. The electric push rod is supported by a support frame, and the buckle plate fixes the main body of the bridge deck. The rotation of the bidirectional threaded rod moves two sliding blocks, which in turn move the tension frame to clamp the top of the stud. Then, the electric push rod is activated to perform a tensile test on the stud. The semi-circular shape of the tension frame prevents the top of the stud from slipping off, thus allowing for effective testing of the stud and making it convenient to use.

[0024] The tensile fatigue performance testing device for the studs in this composite bridge deck structure uses a mounting plate and bolts. The mounting plate is fixed by the bolts, which in turn fixes the buckle plate. This makes it easy to fix the main body of the bridge deck on the test platform and also makes it easy to loosen the bolts and remove the main body of the bridge deck at any time. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of the test platform of this utility model;

[0027] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0028] Figure 4 This is a schematic diagram of the main structure of the top plate of this utility model.

[0029] In the diagram: 1. Test bench; 2. Support leg; 3. Support frame; 4. Electric push rod; 5. Bracket; 6. Two-way threaded rod; 7. Slide seat; 8. Tension frame; 9. Bridge panel body; 10. Stud body; 11. Buckle plate; 12. Mounting plate; 13. Bolt; 14. Fixing plate one; 15. Telescopic rod; 16. Fixing plate two; 17. Placement frame; 18. Collection frame; 19. Clamping plate; 20. Base plate; 21. Vertical plate; 22. Pull plate; 23. Support plate; 24. Connecting plate; 25. Spring one; 26. Slide rod; 27. Top plate; 28. Spring two; 29. ​​Fixing rod. Detailed Implementation

[0030] Please see Figure 1-4This utility model provides a device for testing the tensile fatigue performance of studs in a composite bridge deck structure. It includes a test platform 1, a stud body 10, four support legs 2 mounted on the lower surface of the test platform 1, and a U-shaped support frame 3 mounted on the upper surface of the test platform 1. An electric push rod 4 is mounted on the lower surface of the transverse portion of the support frame 3. A U-shaped bracket 5 is mounted at the output shaft end of the electric push rod 4. A bidirectional threaded rod 6 is rotatably mounted on the bracket 5. One end of the bidirectional threaded rod 6 extends through the bracket 5 and is fitted with an operating plate. Slide seats 7 are threaded onto both ends of the bidirectional threaded rod 6. Semi-circular tension frames 8 are mounted on opposite sides of the two slide seats 7. A semi-circular groove is formed on the lower surface of the tension frame 8. Two L-shaped... A bridge deck body 9 is set between two buckle plates 11, and a stud body 10 is fixed on the bridge deck body 9. The buckle plates 11 are equipped with installation components. By setting up an electric push rod 4, buckle plates 11, a bidirectional threaded rod 6 and a tension frame 8, the electric push rod 4 is supported by the support frame 3. Combined with the fixing effect of the buckle plates 11 on the bridge deck body 9, the rotation of the bidirectional threaded rod 6 moves the two slides 7, which in turn moves the tension frame 8 to clamp and fasten the top of the stud body 10. Then, by activating the electric push rod 4, a tensile test is performed on the stud. The semi-circular shape of the tension frame 8 ensures that the top of the stud body 10 will not slip off, thus allowing for good testing of the stud body 10 and making it convenient to use.

[0031] The mounting assembly includes two sets of Z-shaped mounting plates 12, with two mounting plates 12 in each set. The two mounting plates 12 in the same set are installed on the front and rear sides of the buckle plate 11 on the same side, respectively. Bolts 13 are threaded on the mounting plates 12, and the tail ends of the bolts 13 are threaded to the test bench 1. By setting up the mounting plates 12 and the bolts 13, the mounting plates 12 are fixed by the bolts 13, thereby fixing the buckle plate 11. This makes it easy to fix the bridge panel body 9 on the test bench 1, and also makes it easy to loosen the bolts 13 to remove the bridge panel body 9 at any time.

[0032] Fixing plates 14 are installed on both the front and rear sides of the bracket 5, and fixing plates 16 are installed on both the front and rear sides of the slide 7. A telescopic rod 15 is installed on the fixing plate 14, and the telescopic shaft of the telescopic rod 15 is fixedly connected to the fixing plate 16 on the same side. By setting the telescopic rod 15, the fixing plate 14 supports and fixes the telescopic rod 15. Combined with the function of the fixing plate 16, the fixing plate 16 indirectly connects to the slide plate. The extension of the telescopic rod 15 provides limiting support for the slide 7.

[0033] A base plate 20 is installed between the four support legs 2. A collection frame 18 with an opening on the upper surface of the base plate 20 is provided. Two slots are opened on the upper surface of the base plate 20, and a retaining plate 19 is provided in the slot. The collection frame 18 is installed on the upper surface of the retaining plate 19. A handle is installed on the front side of the collection frame 18. By setting up the base plate 20, the collection frame 18 and the retaining plate 19, the base plate 20 supports the collection frame 18. Combined with the function of the collection frame 18, it is convenient to collect the unqualified stud bodies 10. It is convenient to process the unqualified stud bodies 10 in a centralized manner later. Combined with the sliding action of the retaining plate 19 in the slot, the collection frame 18 is locked.

[0034] The upper surface of the test platform 1 has a channel, and the lower surface of the test platform 1 is equipped with a support plate 23. Two sliding rods 26 are slidably installed on the support plate 23. The bottom ends of the two sliding rods 26 are installed with the same connecting plate 24. Springs 25 are sleeved on the sliding rods 26 and fixedly connected at both ends to the connecting plate 24 and the support plate 23, respectively. The top ends of the two sliding rods 26 are equipped with the same top plate 27, which is located in the channel. By setting up the support plate 23, sliding rods 26 and springs 25, the support rods support the sliding rods 26. Combined with the elasticity of the top plate 27 and springs 25, the bridge panel body 9 of different thicknesses is pushed upward, so that the bridge panel body 9 always abuts against the buckle plate 11, thus expanding the applicability of the bridge panel body 9.

[0035] Two placement frames 17 are installed on the lower surface of the test platform 1. The openings of the two placement frames 17 are arranged opposite each other. The two placement frames 17 are located on the left and right sides of the passage, respectively. By setting up the placement frames 17, the staff can conveniently store the weight blocks or heavy objects in the placement frames 17, thereby improving the stability of the test platform 1 and preventing the test platform 1 from shaking during the tensile test of the stud body 10, thus improving the stability of the test platform 1.

[0036] A vertical plate 21 is installed on the upper surface of the base plate 20. A through hole is provided on the vertical plate 21, and a fixing rod 29 is provided at the through hole. A fixing groove that cooperates with the fixing rod 29 is provided on the left side of the collection frame 18. One end of the fixing rod 29 extends into the fixing groove. By setting up the vertical plate 21 and the fixing rod 29, the fixing rod 29 is supported and fixed by the vertical plate 21. Combined with the function of the fixing groove on the collection frame 18, the fixing rod 29 is fixed by extending one end into the fixing groove, thereby fixing the collection frame 18 stably on the base plate 20 and preventing the collection frame 18 from shaking during the operation of the test bench 1.

[0037] A pull plate 22 is installed on the left end of the fixed rod 29. A spring 28 is sleeved on the fixed rod 29 and its two ends are fixedly connected to the vertical plate 21 and the pull plate 22 respectively. By setting the pull plate 22 and the spring 28, the pull plate 22 allows the staff to move the fixed rod 29 quickly and conveniently. Combined with the elasticity of the spring 28, the fixed rod 29 will not fall off or detach from the vertical plate 21, thereby improving the firmness and stability of the fixed rod 29. The fixed rod 29 can be reset by the elasticity of the spring 28.

[0038] In use, the bridge deck body 9 is placed on the top plate 27. The top plate 27 is then adjusted according to the thickness of the bridge deck body 9. When the bridge deck body 9 is thinner, the slide rod 26 slides upward under the elastic force of the spring 25. The slide rod 26 drives the top plate 27 to move upward. At this time, the top plate 27 drives the bridge deck body 9 to move upward, abutting against the transverse portion of the buckle plate 11. Then, the bolt 13 is rotated to fix the mounting plate 12, thereby fixing the buckle plate 11 and securing the bridge deck body 9 to the test bench 1. Finally, the bolt body 10 is fixed to the bridge deck body 9. Start the electric push rod 4, which drives the bracket 5 to move downwards. The bracket 5 drives the bidirectional threaded rod 6 to move, and the bidirectional threaded rod 6 drives the tension frame 8 to move downwards through the slide 7. When the two tension frames 8 move downwards to the left and right sides of the top of the stud body 10, turn off the electric push rod 4. Then rotate the bidirectional threaded rod 6, which drives the slide 7 to move. The slide 7 drives the tension frame 8 to move closer to the stud body 10, and the top of the stud body 10 is clamped by the two tension frames 8. Then start the electric push rod 4 again to reset, and the stud body 10 can be tested.

Claims

1. A device for testing the tensile fatigue performance of a dowel in a composite bridge deck panel structure, characterized by: Including test platform (1), peg main part (10), four support legs (2) installed on the lower surface of test platform (1) and U-shaped support frame (3) installed on the upper surface of test platform (1), the lower surface of the transverse part of support frame (3) is provided with electric push rod (4), the output shaft end of electric push rod (4) is provided with U-shaped support (5), bidirectional threaded rod (6) is rotatably installed on support (5), one end of bidirectional threaded rod (6) extends out of support (5) and is provided with operating plate, sliding seat (7) is threadedly installed on the threads of bidirectional threaded rod (6), the opposite side of two sliding seats (7) is respectively provided with semicircular stretching frame (8), the lower surface of stretching frame (8) is provided with semicircular groove, the upper surface of test platform (1) is hingedly provided with two L-shaped buckling plates (11), bridge deck main part (9) is arranged between two buckling plates (11), peg main part (10) is fixed on bridge deck main part (9), mounting assembly is arranged on buckling plate (11).

2. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 1, wherein: The mounting assembly includes two groups of Z-shaped mounting plates (12), each group of mounting plates (12) is two in number, the two mounting plates (12) in the same group are respectively arranged on the front and rear sides of the same side buckling plate (11), the mounting plate (12) is threadedly provided with bolt (13), and the tail end of bolt (13) is threadedly connected with test platform (1).

3. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 1, wherein: The front and rear sides of support (5) are respectively provided with fixed plate one (14) and fixed plate two (16), the telescopic rod (15) is installed on the fixed plate one (14), and the telescopic shaft of telescopic rod (15) is fixedly connected with the same side fixed plate two (16).

4. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 1, wherein: The bottom plate (20) is arranged between the four support legs (2), the upper surface of the bottom plate (20) is provided with the collecting frame (18) with an opening on the upper surface, two clamping grooves are formed in the upper surface of the bottom plate (20), the clamping grooves are provided with clamping plates (19), the collecting frame (18) is arranged on the upper surface of the clamping plate (19), and the front side of the collecting frame (18) is provided with a handle.

5. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 1, wherein: The upper surface of test platform (1) is provided with a channel, the lower surface of test platform (1) is provided with support plate (23), two slide rods (26) are slidably and penetratively arranged on the support plate (23), the bottom ends of two slide rods (26) are provided with the same connecting plate (24), the slide rods (26) are sleeved with springs one (25) fixedly connected with the connecting plate (24) and the support plate (23) at both ends, the top ends of two slide rods (26) are provided with the same top plate (27), and the top plate (27) is located in the channel.

6. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 5, wherein: The lower surface of test platform (1) is provided with two placing frames (17), the openings of two placing frames (17) are oppositely arranged, and two placing frames (17) are respectively located on the left and right sides of the channel.

7. The apparatus of claim 4, wherein: The upper surface of the bottom plate (20) is provided with a vertical plate (21), a through hole is formed in the vertical plate (21), a fixed rod (29) is arranged at the through hole, a fixed groove matched with the fixed rod (29) is formed in the left side of the collecting frame (18), and one end of the fixed rod (29) extends into the fixed groove.

8. The apparatus for testing the tensile fatigue performance of dowel in a composite bridge deck panel structure according to claim 7, wherein: A pull plate (22) is arranged at the left end of the fixed rod (29), and a spring (28) is sleeved on the fixed rod (29) and fixedly connected with the vertical plate (21) and the pull plate (22) at two ends.

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