Concrete tensile deformation measuring device

Abstract

The utility model discloses a concrete tensile deformation measuring device, which comprises an upper support frame 1 and a lower support frame 7, the upper support frame 1 and the lower support frame 7 are arranged on a concrete tensile test piece in parallel, two ends of the upper support frame 1 are respectively connected with a displacement meter 11, the axis of each displacement meter 11 is parallel to the tensile direction, and the telescopic end of each displacement meter 11 is contacted with the lower support frame 7. The concrete tensile deformation measuring device provided by the utility model solves the problem that tensile test pieces with different section sizes cannot be measured in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete testing devices, in particular to a concrete tensile deformation measuring device. Background Art

[0002] Concrete tensile deformation is the maximum deformation that concrete can resist when resisting tension. It is an important indicator for evaluating concrete performance. With the development of concrete technology, the types of concrete are increasing, and the maximum aggregate size ranges from 5mm to 150mm. When conducting concrete tensile deformation tests, the concrete tensile cross-sectional size generally needs to be greater than 3 times the maximum aggregate size. The current tensile measurement device can only measure concrete tensile specimens with one cross-sectional size, and cannot measure tensile specimens with different cross-sectional sizes, so the scope of use is limited. Utility Model Content

[0003] The utility model aims to provide a concrete tensile deformation measuring device, which solves the problem that the tensile test pieces with different cross-sectional sizes cannot be measured in the prior art.

[0004] The technical solution adopted by the utility model is: a concrete tensile deformation measuring device, comprising an upper support frame and a lower support frame, the upper support frame and the lower support frame are arranged parallel to each other on the concrete tensile test piece, the two ends of the upper support frame are respectively connected with a displacement meter, the axis of the displacement meter is parallel to the tensile direction, and the telescopic end of each displacement meter is in contact with the lower support frame.

[0005] The utility model is also characterized in that:

[0006] The cross section of the upper support frame is n-shaped, and displacement meter sockets are respectively provided at both ends of the upper support frame, and a displacement meter is arranged in each displacement meter socket.

[0007] A displacement meter clamping hole is radially provided in each displacement meter jack, and a displacement meter clamping screw is threadedly connected in each displacement meter clamping hole, and one end of each displacement meter clamping screw is tightly attached to the corresponding displacement meter.

[0008] The upper support frame is provided with a plurality of upper support frame fixing screws, and the plurality of upper support frame fixing screws are arranged between the two displacement meter sockets. The other end of each upper support frame fixing screw is connected to an upper support frame clamping plate. The concrete tensile specimen is arranged between the upper support frame clamping plate and the upper support frame. The side of the upper support frame clamping plate that is in close contact with the concrete tensile specimen is provided with upper clamping plate serrations, and the side of the upper support frame that is in close contact with the concrete tensile specimen is also provided with upper clamping plate serrations.

[0009] The cross-section of the lower support frame is n-shaped, and a plurality of lower support fixing screws are arranged on the lower support frame. The position of each lower support fixing screw corresponds to the corresponding upper support frame fixing screw, and the other end of each lower support fixing screw is connected to a lower support frame clamping plate. The concrete tensile specimen is arranged between the lower support frame clamping plate and the lower support frame, and the side of the lower support frame clamping plate that is in close contact with the concrete tensile specimen is provided with upper clamping plate serrations, and the side of the lower support frame that is in close contact with the concrete tensile specimen is also provided with upper clamping plate serrations.

[0010] The beneficial effects of the utility model are as follows: the distance between the upper fixing frame and the lower fixing frame of the measuring device can be adjusted according to the size of the specimen, and is suitable for measuring concrete tensile specimens of different lengths. The upper and lower brackets are fixed to the concrete by two screws, so that the inner wall of the bracket with a serrated structure and the concrete can be firmly clamped without slipping. The displacement meters on both sides of the concrete are clamped by screws, which is convenient for installation and disassembly. The contact surface between the bracket and the concrete is serrated, which ensures that the contact between the bracket and the concrete tensile specimen is stable and does not produce relative slippage, affecting the measurement results. In actual use, the length of the fixing screws can be increased to adapt to concrete tensile specimens of different cross-sectional sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a front view structural schematic diagram of the concrete tensile deformation measuring device of the utility model;

[0012] Figure 2 This is a schematic diagram of the top view of the upper support frame of the concrete tensile deformation measuring device of the utility model;

[0013] Figure 3 This is a schematic diagram of the top view of the lower support frame of the concrete tensile deformation measuring device of the utility model.

[0014] In the figure: 1. Upper support frame; 2. Displacement meter socket; 3. Displacement meter clamping hole; 4. Upper support frame clamping plate; 5. Upper support frame fixing screw; 6. Upper clamping plate serration; 7. Lower support frame; 8. Lower support frame fixing screw; 9. Lower support frame clamping plate; 10. Lower clamping plate serration structure; 11. Displacement meter. DETAILED DESCRIPTION

[0015] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0016] like Figure 1The utility model provides a concrete tensile deformation measuring device, including an upper support frame 1 and a lower support frame 7. The upper support frame 1 and the lower support frame 7 are arranged parallel to each other on the concrete tensile specimen. The two ends of the upper support frame 1 are respectively connected to a displacement meter 11. The axis of the displacement meter 11 is parallel to the stretching direction. The telescopic end of each displacement meter 11 is in contact with the lower support frame 7. Its function is that when the concrete tensile specimen is stretched, the lower support frame moves downward, so that the telescopic end of the displacement meter 11 closely attached thereto also moves downward, thereby measuring its stretching amount.

[0017] like Figure 2 As shown, the cross section of the upper support frame 1 is n-shaped, and displacement meter sockets 2 are respectively provided at both ends of the upper support frame 1, and a displacement meter 11 is provided in each displacement meter socket 2. A displacement meter clamping hole 3 is provided in the radial direction of each displacement meter socket 2, and a displacement meter clamping screw is connected to each displacement meter clamping hole 3 through a thread, and one end of each displacement meter clamping screw is in close contact with the corresponding displacement meter 11, and its purpose is to fix the displacement meter 11. A plurality of upper support frame fixing screws 5 are provided on the upper support frame 1, and the plurality of upper support frame fixing screws 5 are arranged between two displacement meter sockets 2, and the other end of each upper support frame fixing screw 5 is connected to an upper support frame clamping plate 4, and the concrete tensile specimen is arranged between the upper support frame clamping plate 4 and the upper support frame 1, and the upper support frame clamping plate serrations are provided on the side of the upper support frame clamping plate 4 that is in close contact with the concrete tensile specimen, and the upper support frame 1 is also provided with an upper clamping plate serrations on the side of the upper support frame 1 that is in close contact with the concrete tensile specimen, and its purpose is to increase the friction with the concrete tensile specimen and prevent slipping.

[0018] like Figure 3 As shown, the cross-section of the lower support frame 7 is n-shaped, and a plurality of lower support fixing screws 8 are provided on the lower support frame 7. The position of each lower support fixing screw 8 corresponds to the corresponding upper support frame fixing screw 5, and the other end of each lower support fixing screw 8 is connected to a lower support frame clamping plate 9. The concrete tensile specimen is arranged between the lower support frame clamping plate 9 and the lower support frame 7. The side of the lower support frame clamping plate 9 that is in close contact with the concrete tensile specimen is provided with upper clamping plate serrations, and the side of the lower support frame 7 that is in close contact with the concrete tensile specimen is also provided with upper clamping plate serrations, the purpose of which is to increase the friction with the concrete tensile specimen to prevent slipping.

[0019] The concrete tensile deformation measuring device provided by the utility model has the following working principle: first, the upper support frame 1 and the upper support frame card plate 4 are fixed to the upper part of the concrete tensile test piece through the upper support frame fixing screws 5, so that the upper card plate serrations 6 are in close contact with the concrete tensile test piece without sliding. In the same way, the lower support frame 7 and the lower support frame card plate 9 are fixed to the lower part of the concrete tensile test piece through the lower support fixing screws 8. The spacing between the upper support frame 1 and the lower support frame 7 can be adjusted according to the required gauge length of the concrete tensile deformation to be measured. Two displacement meters 11 are respectively inserted into the displacement meter jacks 2 on both sides of the upper support frame 1, and then the displacement meter card holes are tightened to fix the displacement meter 11 firmly. The lower end of the displacement meter 11 is against the lower support frame 7, and the concrete tensile test is started.

[0020] Example 1

[0021] like Figure 1 As shown, the concrete tensile deformation measuring device proposed in this embodiment includes an upper support frame 1 and a lower support frame 7. The upper support frame 1 and the lower support frame 7 are arranged parallel to each other on the concrete tensile specimen. The two ends of the upper support frame 1 are respectively connected to a displacement meter 11. The axis of the displacement meter 11 is parallel to the tensile direction, and the telescopic end of each displacement meter 11 is in contact with the lower support frame 7.

[0022] Example 2

[0023] like Figure 1 and Figure 2 As shown, the concrete tensile deformation measuring device proposed in this embodiment includes an upper support frame 1 and a lower support frame 7. The upper support frame 1 and the lower support frame 7 are arranged parallel to each other on the concrete tensile specimen. The two ends of the upper support frame 1 are respectively connected with displacement meters 11. The axis of the displacement meter 11 is parallel to the tensile direction. The telescopic end of each displacement meter 11 is in contact with the lower support frame 7. The cross section of the upper support frame 1 is n-shaped. The two ends of the upper support frame 1 are respectively provided with displacement meter sockets 2. Each displacement meter socket 2 is provided with a displacement meter 11. A displacement meter clamping hole 3 is radially provided in each displacement meter socket 2. A displacement meter clamping hole screw is threadedly connected to each displacement meter clamping hole 3. One end of each displacement meter clamping hole screw is in close contact with the corresponding displacement meter 11. The upper support frame 1 is provided with a plurality of upper support frame fixing screws 5, and the plurality of upper support frame fixing screws 5 are arranged between the two displacement meter jacks 2. The other end of each upper support frame fixing screw 5 is connected to an upper support frame clamping plate 4. The concrete tensile specimen is arranged between the upper support frame clamping plate 4 and the upper support frame 1. The side of the upper support frame clamping plate 4 that is in close contact with the concrete tensile specimen is provided with upper clamping plate serrations, and the side of the upper support frame 1 that is in close contact with the concrete tensile specimen is also provided with upper clamping plate serrations.

[0024] Example 3

[0025] like Figure 1-3As shown, the concrete tensile deformation measuring device proposed in this embodiment includes an upper support frame 1 and a lower support frame 7. The upper support frame 1 and the lower support frame 7 are arranged parallel to each other on the concrete tensile specimen. The two ends of the upper support frame 1 are respectively connected with displacement meters 11. The axis of the displacement meter 11 is parallel to the tensile direction. The telescopic end of each displacement meter 11 is in contact with the lower support frame 7. The cross section of the upper support frame 1 is n-shaped. The two ends of the upper support frame 1 are respectively provided with displacement meter sockets 2. Each displacement meter socket 2 is provided with a displacement meter 11. A displacement meter clamping hole 3 is radially provided in each displacement meter socket 2. A displacement meter clamping hole screw is threadedly connected to each displacement meter clamping hole 3. One end of each displacement meter clamping hole screw is in close contact with the corresponding displacement meter 11. The upper support frame 1 is provided with a plurality of upper support frame fixing screws 5, which are arranged between the two displacement meter jacks 2, and the other end of each upper support frame fixing screw 5 is connected to an upper support frame clamping plate 4, and the concrete tensile test piece is arranged between the upper support frame clamping plate 4 and the upper support frame 1, and the upper support frame clamping plate 4 is provided with upper clamping plate serrations on the side that is in close contact with the concrete tensile test piece, and the upper support frame 1 is also provided with upper clamping plate serrations on the side that is in close contact with the concrete tensile test piece. The cross section of the lower support frame 7 is n-shaped, and the lower support frame 7 is provided with a plurality of lower support fixing screws 8, and the position of each lower support fixing screw 8 corresponds to the corresponding upper support frame fixing screw 5, and the other end of each lower support fixing screw 8 is connected to a lower support frame clamping plate 9, and the concrete tensile test piece is arranged between the lower support frame clamping plate 9 and the lower support frame 7, and the lower support frame clamping plate 9 is provided with upper clamping plate serrations on the side that is in close contact with the concrete tensile test piece, and the lower support frame 7 is also provided with upper clamping plate serrations on the side that is in close contact with the concrete tensile test piece.

Claims

1. A concrete tensile deformation measuring device, characterized in that: The invention comprises an upper support frame (1) and a lower support frame (7), wherein the upper support frame (1) and the lower support frame (7) are arranged parallel to each other on a concrete tensile test piece, and the two ends of the upper support frame (1) are respectively connected to displacement meters (11), the axis of the displacement meter (11) is parallel to the tensile direction, and the telescopic end of each displacement meter (11) is in contact with the lower support frame (7); The cross section of the upper support frame (1) is n-shaped, and displacement meter sockets (2) are respectively provided at both ends of the upper support frame (1), and a displacement meter (11) is provided in each of the displacement meter sockets (2); A displacement meter clamping hole (3) is radially provided in each displacement meter insertion hole (2), a displacement meter clamping screw is threadedly connected to each displacement meter clamping hole (3), and one end of each displacement meter clamping screw is tightly attached to the corresponding displacement meter (11); The upper support frame (1) is provided with a plurality of upper support frame fixing screws (5), the plurality of upper support frame fixing screws (5) being arranged between the two displacement meter jacks (2), the other end of each of the upper support frame fixing screws (5) being connected to an upper support frame clamping plate (4), the concrete tensile specimen being arranged between the upper support frame clamping plate (4) and the upper support frame (1), the side of the upper support frame clamping plate (4) in close contact with the concrete tensile specimen being provided with upper clamping plate saw teeth, and the side of the upper support frame (1) in close contact with the concrete tensile specimen being provided with upper clamping plate saw teeth as well; The cross section of the lower support frame (7) is n-shaped. The lower support frame (7) is provided with a plurality of lower support fixing screws (8). The position of each lower support fixing screw (8) corresponds to the corresponding upper support frame fixing screw (5). The other end of each lower support fixing screw (8) is connected to a lower support frame clamping plate (9). The concrete tensile test piece is arranged between the lower support frame clamping plate (9) and the lower support frame (7). The side of the lower support frame clamping plate (9) in close contact with the concrete tensile test piece is provided with upper clamping plate saw teeth. The side of the lower support frame (7) in close contact with the concrete tensile test piece is also provided with upper clamping plate saw teeth.

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