CN117030432A - Support device for full-size beam static bending and shearing performance test and test device - Google Patents

Support device for full-size beam static bending and shearing performance test and test device Download PDF

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Publication number
CN117030432A
CN117030432A CN202310993033.XA CN202310993033A CN117030432A CN 117030432 A CN117030432 A CN 117030432A CN 202310993033 A CN202310993033 A CN 202310993033A CN 117030432 A CN117030432 A CN 117030432A
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CN
China
Prior art keywords
full
size
static bending
side limiting
performance test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310993033.XA
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Chinese (zh)
Inventor
董春雷
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Southwest Forestry University
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Southwest Forestry University
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Application filed by Southwest Forestry University filed Critical Southwest Forestry University
Priority to CN202310993033.XA priority Critical patent/CN117030432A/en
Publication of CN117030432A publication Critical patent/CN117030432A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0023—Bending
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0025—Shearing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0264—Beam
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The application discloses a supporting device and a supporting device for testing static bending and shearing performance of a full-size cross beam, which are used for testing mechanical performance of bamboo-based and wood-based cross beams and relate to the technical field of cross beam mechanical performance testing. The application also provides a full-size beam static bending and shearing performance testing device, and the scheme provided by the application can improve the scientificity and accuracy of full-size bamboo-based and wood-based beam static bending and shearing performance testing results.

Description

Support device for full-size beam static bending and shearing performance test and test device
Technical Field
The application relates to the technical field of beam performance test, in particular to a supporting device for full-size beam static bending and shearing performance test and a testing device.
Background
The cross beam is an important load bearing member in bamboo-based or wood-based buildings, and its static bending and shearing properties are critical to the safety and stability of the bamboo/wood-based building. Because of the lack of specialized testing devices, technicians currently typically use small pieces of test pieces of the same material as bamboo-based or wood-based beams to test the static bending and shearing properties of the beams. However, the bending and shearing properties of the beam are closely related to the size of the test piece selected, and thus, the prior art method of testing with small-sized test pieces and using the results thereof for evaluating the properties of large-sized test pieces is clearly questionable.
Based on the above, a new beam static bending and shearing performance testing device is urgently needed to solve the above problems.
Disclosure of Invention
The application aims to provide a supporting device for testing static bending and shearing performance of a full-size cross beam and a testing device, so as to solve the problems in the prior art and improve the scientificity and the accuracy of a testing result.
In order to achieve the above object, the present application provides the following solutions:
the application provides a supporting device for full-size cross beam static bending and shearing performance test, which comprises two supporting tables and a plurality of side limiting pieces, wherein the two supporting tables are opposite and are arranged at intervals, the two supporting tables are respectively used for supporting two ends of the full-size cross beam, and the side limiting pieces are uniformly distributed on two sides of the cross beam in the width direction.
Preferably, the side limiting members are arranged in pairs, two of the side limiting members in each pair are respectively opposite to the two sides of the cross beam, the distance between every two adjacent pairs of side limiting members can be adjusted, and the distance between two of the side limiting members in each pair of side limiting members can also be adjusted.
Preferably, the side limiting member is used for supporting the side surface of the cross beam and is a roller, the roller can rotate, and the roller is vertically arranged.
Preferably, the supporting table and the side limiting member are both arranged on the frame, three parallel rails are arranged on the frame, the supporting table can be slidably arranged on the rails in the middle, and the side limiting member can be slidably arranged on the rails on two sides.
Preferably, the height of the frame is adjustable.
Preferably, the support table includes a top plate and a lower slider, the lower slider is slidably disposed on the track, the top plate is rotatably disposed on the lower slider around a first axis, the first axis extends along a width direction of the beam, and a top surface of the top plate is supported on a bottom surface of the beam.
Preferably, the lower slider and the side limiting member can be locked on the track through locking members.
Preferably, the top surface of the frame is provided with graduation marks extending along the length direction.
The application also provides a full-size beam static bending and shearing performance testing device which comprises a force transfer beam, the testing machine and the supporting device for full-size beam static bending and shearing performance testing, wherein the force transfer beam is used for being installed at the pressurizing end of the testing machine and transmitting the driving force of the testing machine to the top surface of the beam.
Preferably, the bottom of the force transfer beam is provided with a pressing block, the pressing block is rotatably arranged at the bottom of the force transfer beam around a second axis, the second axis extends along the width direction of the cross beam, and the bottom surface of the pressing block is provided with a cambered surface extending along the length direction of the cross beam.
Compared with the prior art, the application has the following technical effects:
the supporting device for full-size beam static bending and shearing performance test is used for performance test of the full-size beam, the test result is high in authenticity, and the side limiting piece is used for preventing the beam from being bent laterally under pressure in the test process, so that the full-size beam static bending and shearing performance test is guaranteed to have vertical bending and shearing only.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a full-size beam static bending and shear performance test supporting device according to a first embodiment and a force transfer beam according to a second embodiment;
FIG. 2 is an exploded view of the structure of the support table;
FIG. 3 is a schematic view of a pair of side stoppers mounted on a rail;
FIG. 4 is a schematic view of the structure of the press block and the connecting slider;
in the figure: 1-a supporting table; 2-side restraints; 3-a force transfer beam; 4-a frame; 11-top plate; 12-a lower slide block; 13-screw holes; 21-a roller; 22-a bracket; 23-waist holes; 41-track; 31-briquetting; 32-connecting slide blocks.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application aims to provide a supporting device for testing static bending and shearing performance of a full-size cross beam and a testing device, so as to solve the problems in the prior art and improve the scientificity and the accuracy of a testing result.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
Example 1
This embodiment provides a full-size crossbeam is quiet to bend and support device for shearing performance test for carry out the performance test to bamboo base, wooden base crossbeam, the size matches in full-size crossbeam, as shown in fig. 1, including two supporting bench 1 and a plurality of side locating part 2, two supporting bench 1 are relative and possess the interval ground setting, two supporting bench 1 are used for supporting respectively in the both ends of full-size crossbeam so that the crossbeam interlude is the unsettled state, can the downwarping when so that the testing machine applys the load to the crossbeam, the both sides equipartition of width direction of crossbeam is equipped with side locating part 2, side locating part 2 possesses the spacing face, the spacing face supports in the side of crossbeam in order to prevent that the crossbeam from pressing the side to crooked in the testing process, guarantee that it only possesses vertical crooked and shearing.
The support table 1 and the side restraints 2 are arranged on a support structure, such as a frame 4 or the like.
The supporting device for full-size beam static bending and shearing performance test is used for performing performance test on the full-size beam, and the scientificity and accuracy of test results are improved.
In some embodiments, the side limiting members 2 are arranged in pairs, two side limiting members 2 in each pair of side limiting members 2 are respectively opposite to two sides of the cross beam, the pair of side limiting members 2 are uniformly distributed along the length direction of the cross beam, and the side limiting members 2 arranged in pairs can offset lateral moment born by the cross beam, so that lateral bending caused by overlarge lateral compression force of the side limiting members 2 on the cross beam is avoided.
In a preferred embodiment, the spacing between each adjacent pair of side restraints 2 can be adjusted to accommodate beams of different lengths, as can the spacing between two side restraints 2 in each pair of side restraints 2.
In some embodiments, the side limiting part 2 is used for supporting the side surface of the beam and is a roller 21, the roller 21 can rotate, the roller 21 is vertically arranged, the surface of the roller 21 is an arc limiting surface, when a test is performed, the beam is inevitably bent, and simultaneously, the beam moves horizontally and vertically relative to the roller 21, if the limiting surface is a fixed surface, the maximum static friction force is inevitably overcome when the beam is bent, and the static friction force can prevent the beam from deforming, so that the test result is inaccurate.
Preferably, the rollers 21 are also obliquely arranged, the oblique direction is determined according to the bending state of the cross beam, and the oblique directions of the rollers 21 at two sides of the center point of the cross beam are opposite, so that the friction force required by driving the rollers 21 to rotate when the cross beam is bent is reduced to the greatest extent.
In some embodiments, the support table 1 and the side limiting member 2 are both disposed on the frame 4, three parallel rails 41 are disposed on the frame 4, the support table 1 can be slidably disposed on the middle rail 41, and the side limiting member 2 can be slidably disposed on the rails 41 on both sides.
The rails 41 are T-shaped rails 41, and the supporting table 1 and the side limiting pieces 2 are provided with sliding grooves matched with the T-shaped rails 41. In order to improve stability during testing, the support table 1 and the side stoppers 2 can be locked to the rails 41 by locking members.
Specifically, the locking member may be a screw or a bolt, and the supporting table 1 and the side limiting member 2 are provided with screw holes 13, and after the screw or the bolt is screwed into the screw holes 13, the end of the screw or the bolt can be abutted against the rail 41 to play a role in locking the supporting table 1 and the side limiting member 2.
As shown in fig. 3, the side limiting members 2 comprise rollers 21 and a bracket 22, a waist hole 23 is formed in the bottom of the bracket 22, the bottom of the bracket 22 is mounted on a sliding block, the sliding block is mounted on a track 41, a threaded hole is formed in the top surface of the sliding block, and the bracket 22 is fixed on the sliding block through the waist hole 23, the threaded hole and a bolt, so that the purpose of adjusting a gap between the two side limiting members 2 is achieved.
In some embodiments, the height of the stand 4 is adjustable, as shown in fig. 1, and a plurality of lifting legs are disposed at the bottom of the stand 4, or any structure capable of lifting in the prior art may be adopted.
In some embodiments, as shown in fig. 2, the support platform 1 includes a top plate 11 and a lower slider 12, the lower slider 12 is slidably disposed on the track 41, the top plate 11 is rotatably disposed on the lower slider 12 about a first axis, the first axis extends along a width direction of the beam, and a top surface of the top plate 11 is supported on a bottom surface of the beam.
The rotatable roof 11 of this embodiment is provided in order to avoid the phenomenon that the end of the beam tilts and tilts when the beam bends, which causes stress concentration, and thus damages the beam or the roof 11, and can negatively affect the test result.
In some embodiments, the top surface of the frame 4 is provided with graduation marks extending along the length direction, so as to observe the deformation amount of the beam.
Example two
The embodiment provides a full-size beam static bending and shearing performance testing device, which comprises a force transfer beam 3, a testing machine and a full-size beam static bending and shearing performance testing supporting device in the first embodiment, wherein the force transfer beam 3 is used for being installed at the pressurizing end of the testing machine and transmitting the driving force of the testing machine to the top surface of the beam.
The testing machine adopts the products in the prior art, and the force transfer beam 3 is designed in a lightweight way.
This embodiment has all the advantages described in the first embodiment, and will not be described in detail herein.
In some embodiments, the bottom of the force transfer beam 3 is provided with a pressing block 31, the pressing block 31 is rotatably arranged at the bottom of the force transfer beam 3 around a second axis, the second axis extends along the width direction of the beam, and the bottom surface of the pressing block 31 is provided with a cambered surface extending along the length direction of the beam.
Specifically, as shown in fig. 4, the pressing block 31 is connected to the force transfer beam 3 through the connecting slider 32, the bottom of the force transfer beam 3 is provided with a bottom sliding rail, the connecting slider 32 is slidably connected to the bottom sliding rail, a threaded hole is formed in the side surface of the connecting slider 32, and the connecting slider 32 is locked on the bottom sliding rail in a mode of screwing in by a bolt or a screw.
The principles and embodiments of the present application have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.

Claims (10)

1. Full-size crossbeam quiet bent and strutting arrangement for shear performance test, its characterized in that: including two supporting tables and a plurality of side limiting parts, two the supporting tables is relative and possess the setting of interval, two the supporting tables is used for supporting the both ends of full-size crossbeam respectively, the both sides equipartition of the width direction of crossbeam is equipped with side limiting parts.
2. The full-size beam static bending and shearing performance test support device according to claim 1, wherein: the side limiting pieces are arranged in pairs, two of the side limiting pieces in each pair are opposite to the two sides of the cross beam respectively, the distance between every two adjacent pairs of side limiting pieces can be adjusted, and the distance between every two side limiting pieces in each pair of side limiting pieces can also be adjusted.
3. The full-size beam static bending and shearing performance test support device according to claim 1, wherein: the side limiting piece is used for supporting the side face of the cross beam and is of a roller, the roller can rotate, and the roller is vertically arranged.
4. The full-size beam static bending and shearing performance test support device according to claim 2, wherein: the supporting table and the side limiting parts are arranged on the machine frame, three parallel tracks are arranged on the machine frame, the supporting table can be slidably arranged on the middle track, and the side limiting parts can be slidably arranged on the tracks on two sides.
5. The full-size beam static bending and shearing performance test support device according to claim 4, wherein: the height of the frame is adjustable.
6. The full-size beam static bending and shearing performance test support device according to claim 4, wherein: the supporting table comprises a top plate and a lower sliding block, the lower sliding block can be slidably arranged on the track, the top plate can be rotatably arranged on the lower sliding block around a first axis, the first axis extends along the width direction of the cross beam, and the top surface of the top plate is supported on the bottom surface of the cross beam.
7. The full-size beam static bending and shearing performance test support device according to claim 6, wherein: the lower sliding block and the side limiting piece can be locked on the track through the locking piece.
8. The full-size beam static bending and shearing performance test support device according to claim 4, wherein: the top surface of frame is provided with the scale mark that extends along length direction.
9. A full-size crossbeam static bending and shearing performance testing device is characterized in that: the full-size cross beam static bending and shearing performance test support device comprises a force transfer beam, a test machine and the full-size cross beam static bending and shearing performance test support device according to any one of claims 1-8, wherein the force transfer beam is used for being installed at a pressurizing end of the test machine and transmitting driving force of the test machine to the top surface of the cross beam.
10. The full-size beam static bending and shearing performance testing device according to claim 9, wherein: the utility model discloses a power transmission beam, including the crossbeam, the power transmission beam bottom is provided with the briquetting, the briquetting around the second axis rotationally set up in power transmission beam bottom, the second axis along the width direction of crossbeam extends, the bottom surface of briquetting possesses the cambered surface that extends along crossbeam length direction.
CN202310993033.XA 2023-08-08 2023-08-08 Support device for full-size beam static bending and shearing performance test and test device Pending CN117030432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310993033.XA CN117030432A (en) 2023-08-08 2023-08-08 Support device for full-size beam static bending and shearing performance test and test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310993033.XA CN117030432A (en) 2023-08-08 2023-08-08 Support device for full-size beam static bending and shearing performance test and test device

Publications (1)

Publication Number Publication Date
CN117030432A true CN117030432A (en) 2023-11-10

Family

ID=88627440

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310993033.XA Pending CN117030432A (en) 2023-08-08 2023-08-08 Support device for full-size beam static bending and shearing performance test and test device

Country Status (1)

Country Link
CN (1) CN117030432A (en)

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