Spacing-adjustable structure adaptive type deformation measuring device and measuring method thereof

Abstract

The invention relates to the technical field of building measurement, in particular to a space-adjustable structure adaptive deformation measuring device and a measuring method thereof. 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 and the method are mainly applied to the aspect of space-adjustable structure adaptive deformation measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of building measurement, and more specifically, to a structure-adaptive deformation measurement device with adjustable spacing and its measurement method. Background Art

[0002] In pseudo-static tests of civil engineering structures such as bridge piers and pile foundations, the curvature distribution law of the test piece is an important basis for analyzing the mechanical behavior of the test piece, especially the curvature distribution law in the plastic hinge area of the test piece. Generally, the curvature of the test piece is indirectly obtained by calculating the rotation angle values of two adjacent cross-sections. Therefore, the key point of curvature measurement is the measurement of the rotation angle of the cross-section of the test piece. The usual method is to embed or post-plant horizontal steel bars with the same height on both sides of the cross-section position where the rotation angle of the pier column needs to be measured as calibration objects, and use a wire displacement gauge to measure the displacement change values at the ends of the steel bars on both sides, so as to calculate the cross-section rotation angle value.

[0003] The measurement method of embedded steel bars has limitations such as inflexible layout and insufficient adjustment room. At the same time, the method of post-planting steel bars also has deficiencies such as low installation accuracy and insecure installation. In the actual process, the positions with large structural curvature are often severely damaged. The peeling of concrete is likely to cause the embedded or implanted steel bars to fall off, resulting in the invalidation of measurement data. The traditional method has unsatisfactory effects in the actual use process, which limits the experimental research. Summary of the Invention

[0004] In order to overcome the above deficiencies in the prior art, the present invention provides a structure-adaptive deformation measurement device with adjustable spacing and its measurement method. The device is flexibly installed, and the installation and disassembly operations are simple, effectively improving the experimental efficiency. At the same time, it avoids the waste of resources where the fixed components cannot be recycled in the traditional method, and also avoids the damage to the key areas of the test piece, and has good structural stability.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A structure-adaptive deformation measurement device with adjustable spacing, the device is arranged on the test piece, and includes splints, restraint members, screws and wire displacement gauges. There are two groups of splints, and the two splints are symmetrically arranged on both sides of the test piece. A central opening of the splint is provided in the middle of the splint. The restraint member is arranged on the splint through the central opening of the splint. Openings at the ends of the splints are respectively provided at both ends of the splint. The screw is connected to the two splints through the corresponding openings at the ends of the splints on both sides. The wire displacement gauge is connected to the screw.

[0006] The constraint member includes a constraint member body, a constraint member protrusion, and a middle opening of the constraint member. The constraint member body adopts a rectangular block structure. The middle opening of the constraint member is penetrated and opened in the middle of the constraint member body. The constraint member protrusion is arranged on the side of the constraint member body away from the clamping plate. Two groups of constraint member protrusions are symmetrically arranged on the upper and lower sides of the middle opening of the constraint member.

[0007] The middle opening of the constraint member is arranged to match the middle opening of the clamping plate.

[0008] The constraint member and the clamping plate are connected by a constraint member connecting bolt and a constraint member connecting nut. The constraint member connecting bolt sequentially penetrates through the middle opening of the constraint member and the middle opening of the clamping plate. The constraint member connecting nut is connected to one end of the constraint member connecting bolt extending out of the middle opening of the clamping plate.

[0009] Both ends of the screw rod are connected to the clamping plate through an outer nut and an inner nut. The outer nut and the inner nut are tightened on the inner and outer sides of the clamping plate respectively.

[0010] Multiple groups of end openings of the clamping plate are arranged at both ends of the clamping plate.

[0011] The end opening of the clamping plate is arranged to match the outer diameter of the screw rod.

[0012] A measuring method for a structure-adaptive deformation measuring device with adjustable spacing includes the following steps: S1. Determine the installation position of the measuring device on the test piece to be measured. Determine the drilling spacing according to the spacing of the constraint member protrusions and drill holes. The drilling diameter is the same as the diameter of the constraint member protrusion, and the drilling depth is slightly greater than the length of the constraint member protrusion. Pass the constraint member connecting bolt through the middle opening of the constraint member from the side provided with the constraint member protrusion, and fix the constraint member to the test piece to be measured after aligning the hole positions. S2. Align the middle opening of the clamping plate on the clamping plate with the constraint member connecting bolt, install it on the constraint member, put on the constraint member connecting nut, and tighten the constraint member connecting nut after adjusting the horizontal angle of the clamping plate to complete the installation of the clamping plate and the constraint member. S3. Select an end opening of the clamping plate with a suitable position according to the actual needs of the test measurement. Pass the screw rod through the end opening of the clamping plate, and fix the screw rod with an inner nut and an outer nut on the inner and outer sides of the clamping plate respectively. Adjust the length of the screw rod between the two clamping plates on both sides, and tighten the inner nut and the outer nut to form a stable rectangular frame. S4. Fix the wire-pulling displacement gauge in place, and connect its joint part to the screw rod to make them consistent in the vertical direction. S5. When there are measurement requirements for multiple groups of positions, repeat the installation process of S1 to S4 and change the connection part in the length direction of the screw.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the combination of multiple groups of circular openings provided at the end of the clamping plate and the telescopic screw structure, continuous adjustment of the clamping range of the fixture is achieved, which can adapt to different cross-sectional sizes, solve the problem of repeated purchase caused by fixed sizes of traditional fixtures, and significantly improve the versatility of the device; adopting a standardized bolt-nut connection component, non-destructive disassembly and assembly operations are supported, enabling the fixture to be reused in different tests, reducing material waste caused by traditional welding / gluing fixation, and at the same time simplifying the test preparation process; through shallow drilling positioning and local contact type restraint components, deep hole operations required for traditional embedded steel bars are avoided, greatly reducing structural damage to key areas of the test piece, such as plastic hinges and joint core areas, and ensuring the authenticity of the mechanical properties of the test piece during the test; using the rectangular rigid frame formed by the multi-point connection of the screw and the clamping plate, combined with the convex fitting part on the inner side of the clamping plate in close contact with the surface of the test piece, effectively resists the displacement of the displacement meter caused by the test load, and ensures the accuracy of the measurement data; by adjusting the relative position between the clamping plates, the measurement point density can be flexibly set for the area with curvature change of the test piece. Compared with the fixture with a fixed spacing, it can capture local deformation characteristics more accurately and improve the data validity under complex working conditions.

[0014] The installation position of the fixture of this device is set at the side central axis position of the structure to be measured, and the drilling depth is relatively shallow, resulting in less damage to the structure to be measured. Moreover, the contact position between the fixture and the structure to be measured is far from the area where the concrete damage is severe, which can ensure the stable acquisition of measurement data. The solution described in the present invention has the advantages of flexible installation, easy adjustment, and stable structure compared with the existing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the use of the present invention; Figure 2 is a schematic structural diagram of the present invention; Figure 3 is a schematic diagram of the clamping plate structure in the present invention; Figure 4 is a schematic diagram of the restraint component structure in the present invention; Figure 5 is a schematic diagram of the screw structure in the present invention; Figure 6 is a schematic diagram of the installation of the restraint component in the present invention Figure 1 ; Figure 7 is a schematic diagram of the installation of the restraint component in the present invention Figure 2 ; Figure 8 is a schematic diagram of the installation of the screw in the present invention Figure 1; Figure 9 Schematic diagram of screw installation in the present invention Figure 2 ; In the figure: 1 is a clamping plate, 2 is a restraint member, 21 is the restraint member body, 3 is a screw, 4 is an opening in the middle of the clamping plate, 5 is an opening at the end of the clamping plate, 6 is a protruding part of the restraint member, 7 is a middle opening of the restraint member, 8 is a connecting bolt, 9 is a connecting nut, 10 is an outer nut, 11 is an inner nut, and 12 is a wire-type displacement gauge. Specific embodiments

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0017] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the description herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0018] As Figures 1 to 9 shown, a structure-adaptive deformation measurement device with adjustable spacing is provided on a specimen, and the device includes a clamping plate 1, a restraint member 2, a screw 3 and a wire-type displacement gauge 12. There are two sets of clamping plates 1, and the two clamping plates 1 are symmetrically arranged on both sides of the specimen. An opening 4 in the middle of the clamping plate is provided in the clamping plate 1. The restraint member 2 is arranged on the clamping plate 1 through the opening 4 in the middle of the clamping plate. Openings 5 at the ends of the clamping plate are respectively provided at both ends of the clamping plate 1. The screw 3 is connected to the two clamping plates 1 by passing through the corresponding openings 5 at the ends of the two clamping plates 1 on both sides, and the wire-type displacement gauge 12 is connected to the screw 3.

[0019] Drill holes at the position on the specimen where the device is to be installed, fix the restraint member 2 at the drilling position, parallelly arrange the two clamping plates 1 on both sides of the specimen through the restraint member 2, complete the connection at both ends through the screw 3, and then place the wire-type displacement gauge 12 and connect its joint part to the screw 3. The restraint member 2 has advantages such as high hardness and high strength, and can withstand the knocking action during the installation process. The protruding part 6 of the restraint member is an iron solid cylinder, which can be effectively embedded in the specimen to be measured.

[0020] The clamping plate 1 is an aluminum tube with a rectangular hollow cross-section. The aluminum tube has advantages such as light weight and easy installation. The lighter self-weight can prevent the bolt connection between the clamping plate 1 and the restraint member 2 from loosening and ensure the validity of the test data.

[0021] Preferably, the restraint member 2 includes a restraint member body 21, a restraint member protrusion 6, and a restraint member middle opening 7. The restraint member body 21 is in a rectangular block structure. The restraint member middle opening 7 is formed through the middle of the restraint member body 21. The restraint member protrusion 6 is provided on the side of the restraint member body 21 away from the clamping plate 1, and two groups of the restraint member protrusions 6 are symmetrically arranged on the upper and lower sides of the restraint member middle opening 7.

[0022] Preferably, the restraint member middle opening 7 is arranged to match the middle opening 4 of the clamping plate.

[0023] Preferably, the restraint member 2 and the clamping plate 1 are connected by a restraint member connecting bolt 8 and a restraint member connecting nut 9. The restraint member connecting bolt 8 passes through the restraint member middle opening 7 and the middle opening 4 of the clamping plate in sequence, and the restraint member connecting nut 9 is connected to one end of the restraint member connecting bolt 8 extending out of the middle opening 4 of the clamping plate.

[0024] Considering the skew situation of the restraint member 2 caused by the error of drilling holes on the test piece, after installing the restraint member 2, when installing the clamping plate 1, use a spirit level to correct the horizontal angle of the clamping plate 1 and then tighten the restraint member connecting nut 9.

[0025] Preferably, both ends of the screw rod 3 are connected to the clamping plate 1 through an outer nut 10 and an inner nut 11, and the outer nut 10 and the inner nut 11 are tightened on the inner and outer sides of the clamping plate 1 respectively.

[0026] When the screw rod 3 and the clamping plate 1 form a frame, the distance between the screw rod 3 between the two clamping plates 1 is adjusted by combining the inner nut 11 and the outer nut 10 to ensure that the clamping plate 1 and the screw rod 3 form a stable rectangular frame.

[0027] Preferably, multiple groups of clamping plate end openings 5 are provided at both ends of the clamping plate 1. The clamping plate end openings 5 are arranged in an equally spaced distribution, which can realize the flexible placement of the screw rod, facilitate adapting to different sizes of structures to be measured, and improve the applicable scenarios of the present invention.

[0028] Preferably, the clamping plate end opening 5 is arranged to match the outer diameter of the screw rod 3.

[0029] A measuring method for a spacing-adjustable structure-adaptive deformation measuring device includes the following steps: S1. Determine the installation position of the measuring device on the test piece to be measured. Determine the drilling spacing according to the spacing of the restraint member protrusions 6 and drill holes. The drilling diameter is the same as the diameter of the restraint member protrusions 6, and the drilling depth is slightly greater than the length of the restraint member protrusions 6. Pass the restraint member connecting bolt 8 through the middle opening of the restraint member 2 from the side provided with the restraint member protrusions 6, and after aligning the hole positions, fixedly install the restraint member 2 on the test piece to be measured; S2. Align the middle opening 4 of the clamping plate 1 on the clamping plate with the restraint connection bolt 8, install it on the restraint 2, put on the restraint connection nut 9, and after adjusting the horizontal angle of the clamping plate 1, tighten the restraint connection nut 9 to complete the installation of the clamping plate 1 and the restraint 2; S3. Select a clamping plate end opening 5 with a suitable position according to the actual needs of experimental measurement. Pass the screw 3 through the clamping plate end opening 5, and fix the screw 3 on the inner and outer sides of the clamping plate 1 with an inner nut 11 and an outer nut 10 respectively. Adjust the length of the screw 3 between the two clamping plates 1 on both sides, and tighten the inner nut 11 and the outer nut 10 to form a stable rectangular frame; S4. Fix the wire-pulling displacement gauge 12 in place and connect its joint part to the screw 3 to make them consistent in the vertical direction; S5. When there are measurement requirements for multiple groups of positions, repeat the installation process of S1 to S4 and change the connection part in the length direction of the screw 3.

[0030] When installing the measuring device of the present invention, first drill a hole at the position to be installed, the diameter of the drill hole is 8 mm. Pass the restraint connection bolt 8 through the middle opening 7 of the restraint from the side with the restraint protruding part 6, then align the restraint protruding part 6 with the drill hole, and tap the restraint 2 to embed it into the structure to be measured. Then install the connection nut 9 on the restraint connection bolt 8, adjust the horizontal angle of the clamping plate 1, and then tighten the restraint connection nut 9 to complete the connection between the clamping plate 1 and the restraint 2. Then pass the screw 3 through a suitable 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 distances between the two screws 3 on both sides of the two clamping plates 1 are equal to form a rectangular frame structure, and tighten the outer nut 10 and the inner nut 11. Fix the wire-pulling displacement gauge 12 on the structure to be measured and stably connect it through a retractable wire. Thus, the installation of the measuring device is completed.

[0031] When there are requirements for multiple measurement positions, repeat the above installation steps to install the present measuring device on the specimen to be measured, and then place the wire-pulling displacement gauge 12 and connect its joint part to the screw 3.

[0032] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A spacing-adjustable structural adaptive deformation measuring device, which is arranged on a test piece and is characterized by: The invention comprises a clamping plate (1), a restraining member (2), a screw rod (3) and a wire displacement meter (12), wherein the clamping plate (1) is provided with two groups, the two clamping plates (1) are symmetrically arranged on both sides of the specimen, a clamping plate middle opening (4) is opened in the middle of the clamping plate (1), the restraining member (2) is arranged on the clamping plate (1) through the clamping plate middle opening (4), the clamping plate end openings (5) are respectively arranged at both ends of the clamping plate (1), the screw rod (3) is connected to the clamping plates (1) on both sides by passing through the corresponding clamping plate end openings (5) on the clamping plates (1), and the wire displacement meter (12) is connected to the screw rod (3).

2. The spacing-adjustable structural adaptive deformation measuring device according to claim 1, characterized in that: The restraining member (2) comprises a restraining member body (21), a restraining member protrusion (6) and a restraining member middle opening (7); the restraining member body (21) adopts a rectangular block structure; the restraining member middle opening (7) is opened through the middle of the restraining member body (21); the restraining member protrusion (6) is arranged on a side of the restraining member body (21) away from the clamp (1); and two groups of restraining member protrusions (6) are symmetrically arranged on the upper and lower sides of the restraining member middle opening (7).

3. The spacing-adjustable structural adaptive deformation measuring device according to claim 2, characterized in that: The middle opening (7) of the restraining member is arranged to match the middle opening (4) of the clamping plate.

4. The spacing-adjustable structural adaptive deformation measuring device according to claim 3, characterized in that: The restraining member (2) is connected to the clamping plate (1) via a restraining member connecting bolt (8) and a restraining member connecting nut (9); the restraining member connecting bolt (8) is sequentially arranged to pass through the middle opening (7) of the restraining member and the middle opening (4) of the clamping plate; the restraining member connecting nut (9) is connected to one end of the restraining member connecting bolt (8) extending out of the middle opening (4) of the clamping plate.

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

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

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

8. A measurement method using the spacing-adjustable structural adaptive deformation measurement device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Determine the installation position of the measuring device on the specimen to be measured, determine the drilling spacing according to the spacing of the restraining member protrusion (6), and drill holes, the drilling diameter is consistent with the diameter of the restraining member protrusion (6), and the drilling depth is slightly greater than the length of the restraining member protrusion (6), and pass the restraining member connecting bolt (8) through the middle opening of the restraining member (2) from the side where the restraining member protrusion (6) is provided, and after aligning the hole position, fix the restraining member (2) to the specimen to be measured; S2, aligning the middle opening (4) of the clamping plate (1) with the restraining member connecting bolt (8), installing it on the restraining member (2), putting on the restraining member connecting nut (9), adjusting the horizontal angle of the clamping plate (1) and tightening the restraining member connecting nut (9), and completing the installation of the clamping plate (1) and the restraining member (2); S3. According to the actual needs of the test measurement, select a clamping plate end opening (5) with a suitable position, pass the screw rod (3) through the clamping plate end opening (5), and fix the screw rod (3) with an inner nut (11) and an outer nut (10) on the inner and outer sides of the clamping plate (1), respectively, adjust the length of the screw rod (3) between the clamping plates (1) on both sides, tighten the inner nut (11) and the outer nut (10) to form a stable rectangular frame; S4, fix the wire displacement meter (12) in place, and connect its joint to the screw (3) so that the two are aligned in the vertical direction; S5. When there are multiple sets of position measurement requirements, repeat the installation process from S1 to S4, and change the connection position in the length direction of the screw rod (3).

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