Spacing-adjustable structure adaptive type deformation measuring device

Abstract

The utility model relates to the technical field of building measurement, in particular to a space-adjustable structure adaptive type deformation measuring device. The device is arranged on a test piece and comprises two groups of clamping plates, a restraining piece, a screw rod and a stay wire type displacement meter, the two clamping plates are symmetrically arranged on the two sides of the test piece, clamping plate middle openings are formed in the middles of the clamping plates, the restraining piece is arranged on the clamping plates through the clamping plate middle openings, and clamping plate end openings are formed in the two ends of the clamping plates respectively; the screw is connected with the clamping plates on the two sides by penetrating through the corresponding clamping plate end openings in the clamping plates on the two sides, and the stay wire type displacement meter is connected to the screw. The device is flexible in installation and simple in installation and disassembly operation, the experiment efficiency is effectively improved, meanwhile, resource waste caused by the fact that fixing parts cannot be recycled in a traditional mode is avoided, and meanwhile damage to key areas of a test piece is avoided. The device is mainly applied to the aspect of space-adjustable structure adaptive deformation measurement.

Description

Technical Field

[0001] This utility model relates to the field of building measurement technology, and more specifically, to a structurally adaptive deformation measurement device with adjustable spacing. Background Technology

[0002] In quasi-static tests of civil engineering structures such as bridge piers and pile foundations, the curvature distribution of the specimen is an important basis for analyzing its mechanical behavior, especially the curvature distribution in the plastic hinge region. Generally, the curvature of the specimen is indirectly obtained by calculating the rotation angle between two adjacent sections. Therefore, the focus of curvature measurement is on the rotation angle measurement of the specimen section. A common practice is to pre-embed or later-install reinforcing bars of the same horizontal height on both sides of the section where the rotation angle needs to be measured, and then use a string-type displacement gauge to measure the displacement change at the ends of the reinforcing bars on both sides, thereby calculating the section rotation angle.

[0003] Traditional methods for measuring pre-embedded reinforcing bars have limitations such as inflexible layout and insufficient adjustment space. Meanwhile, post-installed reinforcing bars suffer from low installation accuracy and insecure installation. In practice, areas with high structural curvature often experience severe damage, and concrete spalling can easily cause pre-embedded or implanted reinforcing bars to detach, rendering measurement data invalid. The effectiveness of traditional methods in practical applications is less than ideal, limiting experimental research. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides a structurally adaptable deformation measurement device with adjustable spacing. This device is flexible in installation and simple to install and disassemble, effectively improving experimental efficiency. It also avoids the resource waste caused by the inability to recycle fixed components in traditional methods, prevents damage to critical areas of the specimen, and exhibits good structural stability.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An adjustable-spacing, structurally adaptive deformation measuring device is mounted on a specimen. The device includes clamping plates, constraint members, a screw, and a wire-type displacement gauge. Two sets of clamping plates are symmetrically arranged on both sides of the specimen. Each clamping plate has a central opening. The constraint member is mounted on the clamping plate through the central opening. Each clamping plate has end openings at both ends. The screw is connected to the two clamping plates by passing through the corresponding end openings on both sides. The wire-type displacement gauge is connected to the screw.

[0007] The constraint component includes a constraint component body, a constraint component protrusion, and a constraint component central opening. The constraint component body adopts a rectangular block structure. The constraint component central opening is opened through the middle of the constraint component body. The constraint component protrusion is located on the side of the constraint component body away from the clamping plate. Two sets of constraint component protrusions are symmetrically arranged on the upper and lower sides of the constraint component central opening.

[0008] The central opening of the constraint member is matched with the central opening of the clamping plate.

[0009] The constraint member and the clamping plate are connected by constraint member connecting bolts and constraint member connecting nuts. The constraint member connecting bolts are sequentially set through the middle opening of the constraint member and the middle opening of the clamping plate. The constraint member connecting nuts are connected to the end of the constraint member connecting bolts that extends out of the middle opening of the clamping plate.

[0010] Both ends of the screw are connected to the clamping plate via an outer nut and an inner nut, respectively, and the outer nut and inner nut are tightened on the inner and outer sides of the clamping plate.

[0011] The clamping plate has multiple sets of end openings at both ends.

[0012] The opening at the end of the clamping plate is configured to match the outer diameter of the screw.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The clamping range of the fixture can be continuously adjusted by combining multiple sets of circular openings at the ends of the clamping plates with a telescopic screw structure, adapting to different cross-sectional sizes and solving the problem of repeated purchases caused by fixed sizes of traditional fixtures, thus significantly improving the versatility of the device. The standardized bolt-nut connection assembly supports non-destructive disassembly and assembly, allowing the fixture to be reused in different tests, reducing material waste caused by traditional welding / adhesive fixing, and simplifying the test preparation process. Shallow drilling positioning and local contact constraint components avoid the deep-hole operations required for traditional pre-embedded steel bars, significantly reducing structural damage to critical areas of the specimen, such as plastic hinges and core node areas, ensuring the authenticity of the specimen's mechanical properties during testing. The rectangular rigid frame formed by the multi-point connection of the screw and clamping plates, combined with the protruding fitting part on the inner side of the clamping plates in close contact with the specimen surface, effectively resists displacement gauge offset caused by test loads, ensuring the accuracy of measurement data. By adjusting the relative position between the clamping plates, the density of measurement points can be flexibly set for areas of specimen curvature variation, which, compared to fixed-spacing fixtures, can more accurately capture local deformation characteristics and improve the effectiveness of data under complex working conditions.

[0015] This device positions the clamp at the central axis of the side of the structure to be measured, with a shallow drilling depth, resulting in minimal damage to the structure. Furthermore, the contact point between the clamp and the structure is far from areas of severe concrete damage, ensuring stable acquisition of measurement data. Compared to existing methods, the solution described in this invention offers advantages such as flexible installation, easy adjustment, and structural stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the clamping plate structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the constraint structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the screw structure in this utility model;

[0021] Figure 6 This is a schematic diagram of the installation of the constraint component in this utility model. Figure 1 ;

[0022] Figure 7 This is a schematic diagram of the installation of the constraint component in this utility model. Figure 2 ;

[0023] Figure 8 This is a schematic diagram of the screw installation in this utility model. Figure 1 ;

[0024] Figure 9 This is a schematic diagram of the screw installation in this utility model. Figure 2 ;

[0025] In the diagram: 1 is the clamping plate, 2 is the constraint component, 21 is the constraint component body, 3 is the screw, 4 is the opening in the middle of the clamping plate, 5 is the opening at the end of the clamping plate, 6 is the protruding part of the constraint component, 7 is the middle hole of the constraint component, 8 is the connecting bolt, 9 is the connecting nut, 10 is the outer nut, 11 is the inner nut, and 12 is the pull-wire displacement gauge. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figures 1 to 9 As shown, a structurally adaptive deformation measuring device with adjustable spacing is installed on a specimen. The device includes clamping plates 1, constraint members 2, screws 3, and wire-type displacement gauges 12. There are two sets of clamping plates 1, which are symmetrically arranged on both sides of the specimen. A central opening 4 is provided in the middle of the clamping plate 1. The constraint members 2 are installed on the clamping plates 1 through the central opening 4. The clamping plates 1 have end openings 5 ​​at both ends. The screws 3 are connected to the clamping plates 1 on both sides through the corresponding end openings 5 ​​on the clamping plates 1 on both sides. The wire-type displacement gauges 12 are connected to the screws 3.

[0029] Holes are drilled in the specimen at the installation location of the device. Constraint 2 is fixed at the drilled holes. Two clamping plates 1 are parallel to each other on both sides of the specimen using constraint 2, and the two ends are connected by screws 3. Then, a pull-wire displacement gauge 12 is placed and its connector is connected to the screws 3. Constraint 2 has advantages such as high hardness and strength, enabling it to withstand impacts during installation. The protruding part 6 of the constraint 2 is a solid iron cylinder, which can be effectively embedded into the specimen to be measured.

[0030] The clamp 1 is a rectangular hollow aluminum tube. Aluminum tubes have the advantages of being lightweight and easy to install. The lighter weight can prevent the bolt connection between the clamp 1 and the constraint 2 from loosening, thus ensuring the validity of the test data.

[0031] Preferably, the constraint member 2 includes a constraint member body 21, a constraint member protrusion 6, and a constraint member central opening 7. The constraint member body 21 adopts a rectangular block structure. The constraint member central opening 7 is opened through the middle of the constraint member body 21. The constraint member protrusion 6 is located on the side of the constraint member body 21 away from the clamping plate 1. Two sets of constraint member protrusions 6 are symmetrically arranged on the upper and lower sides of the constraint member central opening 7.

[0032] Preferably, the central opening 7 of the constraint member is matched with the central opening 4 of the clamping plate.

[0033] Preferably, the constraint member 2 and the clamping plate 1 are connected by constraint member connecting bolts 8 and constraint member connecting nuts 9. The constraint member connecting bolts 8 are arranged to pass through the middle opening 7 of the constraint member and the middle opening 4 of the clamping plate in sequence. The constraint member connecting nuts 9 are connected to the end of the constraint member connecting bolts 8 that extends out of the middle opening 4 of the clamping plate.

[0034] Considering the skewness of constraint 2 caused by drilling errors on the specimen, after installing constraint 2, a spirit level is used to correct the horizontal angle of clamp 1 before tightening constraint connecting nut 9 when installing clamp 1.

[0035] Preferably, both ends of the screw 3 are connected to the clamping plate 1 through an outer nut 10 and an inner nut 11, respectively, with the outer nut 10 and the inner nut 11 tightened on the inner and outer sides of the clamping plate 1.

[0036] When the screw 3 and the clamping plate 1 form a frame, the distance between the screw 3 and the two clamping plates 1 is adjusted by the combination of the inner nut 11 and the outer nut 10 to ensure that the clamping plate 1 and the screw 3 form a stable rectangular frame.

[0037] Preferably, multiple sets of end openings 5 ​​are provided at both ends of the clamping plate 1. The end openings 5 ​​are arranged with equal spacing, which allows for flexible placement of the screw, making it easy to adapt to different dimensions of the structure to be measured and improving the applicability of this utility model.

[0038] Preferably, the opening 5 at the end of the clamping plate is matched with the outer diameter of the screw 3.

[0039] When installing the measuring device of this utility model, firstly, drill a hole at the installation location with a diameter of 8mm. Pass the constraint member connecting bolt 8 through the middle opening 7 of the constraint member from the side with the constraint member protrusion 6. Then, align the constraint member protrusion 6 with the drilled hole and tap the constraint member 2 to embed it into the structure to be measured. Then, install the connecting nut 9 on the constraint member connecting bolt 8, adjust the horizontal angle of the clamping plate 1, and then tighten the constraint member connecting nut 9 to complete the connection between the clamping plate 1 and the constraint member 2. Next, pass the screw 3 through the appropriate clamping plate end opening 5 and put on the inner nut 11 and the outer nut 10. Adjust the outer nut 10 and the inner nut 11 so that the distance between the screw 3 on both sides of the clamping plate 1 is equal, forming a rectangular frame structure. Tighten the outer nut 10 and the inner nut 11, fix the pull-wire displacement gauge 12 on the structure to be measured, and connect it stably through the retractable pull wire. The installation of the measuring device is now complete.

[0040] When there are multiple measurement locations required, repeat the above installation steps to install this measuring device on the specimen to be measured, and then place the wire displacement gauge 12 and connect its connector to the screw 3.

[0041] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A structurally adaptive deformation measuring device with adjustable spacing, the device being mounted on a specimen, characterized in that: The device includes a clamping plate (1), a constraint member (2), a screw (3), and a wire displacement gauge (12). The clamping plate (1) is provided in two sets, with the two clamping plates (1) symmetrically arranged on both sides of the specimen. The clamping plate (1) has a clamping plate opening (4) in the middle. The constraint member (2) is set on the clamping plate (1) through the clamping plate opening (4). The clamping plate (1) has clamping plate end openings (5) at both ends. The screw (3) is connected to the clamping plates (1) on both sides through the corresponding clamping plate end openings (5) on the clamping plates (1) on both sides. The wire displacement gauge (12) is connected to the screw (3).

2. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 1, characterized in that: The constraint member (2) includes a constraint member body (21), a constraint member protrusion (6), and a constraint member central opening (7). The constraint member body (21) adopts a rectangular block structure. The constraint member central opening (7) is opened through the middle of the constraint member body (21). The constraint member protrusion (6) is located on the side of the constraint member body (21) away from the clamping plate (1). Two sets of constraint member protrusions (6) are symmetrically arranged on the upper and lower sides of the constraint member central opening (7).

3. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 2, characterized in that: The central opening (7) of the constraint member is matched with the central opening (4) of the clamping plate.

4. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 3, characterized in that: The constraint member (2) is connected to the clamping plate (1) by the constraint member connecting bolt (8) and the constraint member connecting nut (9). The constraint member connecting bolt (8) passes through the middle opening (7) of the constraint member and the middle opening (4) of the clamping plate in sequence. The constraint member connecting nut (9) is connected to one end of the constraint member connecting bolt (8) that extends out of the middle opening (4) of the clamping plate.

5. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 1, characterized in that: Both ends of the screw (3) are connected to the clamp (1) through an outer nut (10) and an inner nut (11), respectively. The outer nut (10) and the inner nut (11) are tightened on the inner and outer sides of the clamp (1).

6. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 1, characterized in that: The clamp end openings (5) are provided in multiple sets at both ends of the clamp (1).

7. The adjustable-spacing, structurally adaptive deformation measuring device according to claim 1, characterized in that: The end opening (5) of the clamping plate is matched with the outer diameter of the screw (3).

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