CN112326460A - Practical shear member bearing capacity test device - Google Patents
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- CN112326460A CN112326460A CN202011004875.0A CN202011004875A CN112326460A CN 112326460 A CN112326460 A CN 112326460A CN 202011004875 A CN202011004875 A CN 202011004875A CN 112326460 A CN112326460 A CN 112326460A
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
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- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims description 42
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 54
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 description 13
- 210000003128 head Anatomy 0.000 description 13
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- 238000011160 research Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
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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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- 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
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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0605—Mechanical indicating, recording or sensing means
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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
The invention discloses a practical shear-resistant part bearing capacity test device, which comprises a loading control device and a measurement acquisition device, wherein the loading control device is connected with the measurement acquisition device; the loading control device comprises a hydraulic traction rod, a steel stranded rope and a guide wheel, and the measuring and collecting device comprises a horizontal collecting unit and a vertical collecting unit; the horizontal acquisition unit comprises a pointer, a guide rail, a dial indicator and horizontal coordinate paper; the anti-shearing part is provided with a collecting point, the guide rail is fixed above the test bed or the additional steel plate along the horizontal direction and corresponds to the collecting point of the anti-shearing part, the pointer is sleeved on the guide rail, the tail end of the pointer is opposite to the collecting point, and a contact of the dial indicator is abutted against the end part of the pointer; the vertical acquisition unit comprises a vertical plate and vertical coordinate paper; the vertical coordinate paper is arranged on the vertical plate; the test device provides a new detection mode for measuring the ultimate shear bearing capacity and effective deformation of the shear resistant piece, has the advantages of more accurate data, strong practicability and convenient operation, and is a great innovation of the bearing capacity test of the shear resistant piece.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a practical shear-resistant part bearing capacity test device.
Background
Since the twentieth century, the combined members and structures are continuously approved by engineering and popularized. Meanwhile, research work aiming at the combined member and the structure is continuously increased and deepened, and the advantages of the conventional assembled steel structure and concrete combined member and structure are gradually revealed.
In the assembled steel structure and concrete combined member and structure, the steel structure has the characteristics of convenient connection, good tensile property, contribution to industrial construction and the like. The concrete has the characteristics of low cost, easily obtained materials, good fireproof performance, good compression resistance and the like. The assembled steel structure and concrete combined member and structure make full use of the advantages of two materials. The bearing capacity and the shock resistance of the member and the structure are improved, the ductility of the structure is increased, and the defects of high cost of a pure steel structure, heavy self weight of a reinforced concrete structure and the like are avoided. In fabricated steel and concrete composite members and structures, shear resistant members are used primarily to resist the shearing action between a steel beam and a concrete slab. The relative sliding between the two is limited, and engineering hidden troubles such as tilting or hollowing and falling of the concrete slab are prevented to a certain extent.
The steel beam and the concrete are combined into an organic whole through the shearing resistant part, so that the steel beam and the concrete wing plate can work in a cooperative mode, however, the shearing resistance and the bearing capacity of the shearing resistant part are often key factors influencing the shearing resistance of the assembled steel structure, the concrete combined member and the structure.
At present, the conventional mode for detecting the shearing resistance and bearing capacity of the shearing resistant piece mostly takes an assembled steel beam-concrete member and a whole structure as research objects, and because the structure of the detection equipment is single, the bending deformation condition, the shearing resistance condition and the like of the middle shearing resistant piece can be judged only by applying a single load to the whole structure. However, the research on the mechanical properties of the single shear-resistant part is relatively rare at present, the method is limited, the expected result cannot be achieved or is difficult to achieve better, the important parameters such as the ultimate shear-resistant bearing capacity, the effective deformation, the movement tracks in two directions and the like of the shear-resistant part cannot be synchronously measured, and the bearing capacity test of the shear-resistant part is inconvenient, so that the research on a practical shear-resistant part bearing capacity test device is necessary.
Disclosure of Invention
Aiming at the defects and problems of the existing equipment, the invention provides a practical shear-resistant part bearing capacity test device which effectively solves the problems that the bending deformation condition of the middle shear-resistant part can be judged only by applying a single load, and the experimental precision is poor because a reference object for measuring the deformation is lacked in the test process and only the observation is carried out by naked eyes of a tester in the existing equipment.
The technical scheme adopted by the invention for solving the technical problems is as follows: a practical shear-resistant member bearing capacity test device comprises a loading control device and a measurement acquisition device; the loading control device comprises a hydraulic traction rod, a steel stranded rope and a guide wheel, the hydraulic traction rod is arranged along the horizontal direction, and the starting end of the steel stranded rope is fixed on a rod body of the hydraulic traction rod and is fixed on the shear resistant part after being guided by the guide wheel; the measurement acquisition device comprises a horizontal acquisition unit and a vertical acquisition unit; the horizontal acquisition unit comprises a pointer, a guide rail, a dial indicator and horizontal coordinate paper; the additional steel plate is fixed on the test bed along the horizontal direction, the shear resistant piece is provided with a collection point, and the horizontal coordinate paper is laid on the additional steel plate; the guide rail is fixed above the test bed or the additional steel plate along the horizontal direction and corresponds to the collecting point of the shear-resistant piece, the pointer is sleeved on the guide rail and can slide in a guiding way, the tail end of the pointer is opposite to the collecting point, and the contact of the dial indicator is abutted to the end part of the pointer; the vertical acquisition unit comprises a vertical plate and vertical coordinate paper; the vertical plate is vertically arranged and located on the opposite side of the guide rail, and the vertical coordinate paper is arranged on the vertical plate and used for marking the effective displacement of the collecting point in the vertical direction.
Furthermore, the collecting point is provided with a mounting hole, a laser emitting head is fixed in the rotating hole, a detecting head is arranged on the back face of the vertical coordinate paper, and the detecting head can collect the path and displacement on the laser emitting head.
Furthermore, the dial indicator is fixed on the additional steel plate through a magnetic gauge stand.
Furthermore, the four corners of the additional steel plate are fixed on the test table board through fastening bolts.
Furthermore, the hydraulic traction rod is a separated type hydraulic jack with bidirectional action, and an oil pressure gauge is arranged on the hydraulic traction rod.
Furthermore, the guide wheel is flush with the end part of the hydraulic traction rod, so that the force application section of the steel stranded rope is in a horizontal state.
The invention has the beneficial effects that: the invention is mainly used for researching the mechanical property of an independent shearing resistant part, and comprises a loading control device and a measurement acquisition device, wherein the loading control device mainly utilizes a hydraulic jack to apply a loading force to the shearing resistant part, the applied loading force can be increased step by step, a specific finger of the loading force can be obtained through an oil pressure gauge, the hydraulic jack is suitable for test requirements, the hydraulic jack is connected with the shearing resistant part through a steel strand, the tail end of a steel wire rope is fixed at a designated position of the shearing resistant part through a clamp, and meanwhile, the shearing resistant part is provided with an acquisition point; the measuring and collecting device comprises a horizontal collecting unit and a vertical collecting unit, wherein the horizontal collecting unit sleeves the pointer in the slideway and can slide to ensure that the pointer can be aligned to a collecting point through adjustment, and a dial indicator is used for measuring the micro deformation of the pointer, so that the effective displacement of the shear-resistant piece in the X direction is obtained; and each time the node is changed, the node can be marked on the horizontal coordinate paper; vertical acquisition unit has set up vertical coordinate paper, and the specification of vertical coordinate paper is unanimous with the specification of horizontal coordinate paper, is convenient for contrast, gathers the displacement of point on vertical coordinate paper through the sign to obtain the effective displacement and the movement track of piece that shears in the Y direction.
Meanwhile, in order to conveniently collect the track and the nodes in the Y direction, the laser emitting head is arranged on the collecting point, is light in weight and small in size, moves along with the shearing resistant piece and is always perpendicular to the vertical coordinate paper, and therefore the recording of a tester is facilitated.
The invention discloses a practical shear-resistant member bearing capacity test device, and provides an effective test loading measuring device for researching the mechanical property of an independent shear-resistant member, wherein the loading mode and the destruction form of the shear-resistant member are both close to the actual stress condition, and the shear-resistant bearing capacity of the shear-resistant member at each moment, the corresponding relative effective displacement in the horizontal direction, the corresponding relative effective displacement in the vertical direction and the motion track of the deformation process of the shear-resistant member can be obtained; the shearing resistance limit bearing capacity and the relative effective displacement of the single shearing resistant piece can be obtained; and through the shearing resistance and the relative effective displacement of the shearing resistance and the bearing capacity at each moment, a load displacement curve synchronous with the test in the horizontal direction and the vertical direction can be obtained. The characteristics of the single shearing resistant piece, such as shearing resistance, participation in contribution rate service and the like can be fully analyzed through the load displacement curve. The test device provides a new detection method for measuring the ultimate shear-resistant bearing capacity and effective deformation of the shear-resistant piece, and the test method is simple, accurate in data, strong in practicability and convenient to operate, and is a great innovation of the bearing capacity test of the shear-resistant piece.
Drawings
Fig. 1 is a schematic elevation structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
The reference numbers in the figures are: the test bench is characterized in that the test bench is 1, the hydraulic jack is 2, the piston rod is 3, the oil pump is 4, the guide wheel is 5, the additional steel plate is 6, the shear resistant part is 7, the fastening bolt is 8, the magnetic gauge frame is 9, the guide rail is 10, the pointer is 11, the dial indicator is 12, the horizontal coordinate paper is 13, and the vertical coordinate paper is 14.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1: this embodiment aims at providing a practical shear member bearing capacity test device, shear member mechanical properties alone for the research provides an effectual experimental loading measuring device, can only apply single load to judge the bending deformation condition of middle shear member to existence in the current structure, and lack the reference object of survey deflection in the experimentation, only lean on the experimenter naked eye to observe, cause the poor problem of experimental precision, this embodiment provides an easy operation, the precision is high, and two reference objects have been set up at level and vertical direction, identify its effective displacement.
Specifically, as shown in fig. 1-2, a practical shear-resistant member bearing capacity test device comprises a loading control device and a measurement acquisition device; the loading control device is used for applying loading force to the shear resistant part, and the measurement acquisition device is used for acquiring and recording the effective displacement and the track in the horizontal direction and the vertical direction; the specific structures of both are as follows.
The loading control device comprises a hydraulic traction rod, a steel strand rope and a guide wheel 5, the hydraulic traction rod is arranged along the horizontal direction, and the starting end of the steel strand rope is fixed on a piston rod 3 of the hydraulic traction rod, is guided by the guide wheel 5 and is fixed on a shear resistant part 7; the hydraulic traction rod comprises a hydraulic jack 2, a piston rod 3, an oil pump 4, an oil inlet pipe (front) and an oil return pipe (rear), the jack is a separated type double-acting hydraulic jack, and a thrust recording component is an oil pressure gauge; the guide wheel 5 is a fixed pulley, the fixed pulley is arranged between the hydraulic jack 2 and the shearing resistant piece 7, the lowest point of the fixed pulley and the center of the piston rod are positioned on the same horizontal plane, the direction of the force is mainly adjusted, the force application section of the steel stranded rope is in a horizontal state, and meanwhile, the centers of the shearing resistant piece, the fixed pulley and the piston rod are positioned on the same horizontal plane through the fixed pulley when the steel stranded rope shearing resistant device is used, so that the effective transmission of control force is facilitated.
The measurement acquisition device comprises a horizontal acquisition unit and a vertical acquisition unit; the horizontal acquisition unit comprises a pointer 11, a guide rail 10, a dial indicator 12 and horizontal coordinate paper 13; the additional steel plate 6 is fixed on the test bed 1 along the horizontal direction, and the specific fixing mode is that the four corners of the additional steel plate 6 are fixed on the test bed 1 through fastening bolts 8, so that the relative displacement is not generated in the horizontal direction.
The shear resistant part 7 is provided with a collecting point, the collecting point can be arranged in a manner that a collecting seat is fixed on the shear resistant part, the collecting seat is provided with the collecting point, the collecting point is arranged to be opposite to the middle part of the shear resistant part, and the collecting point can reflect the integral condition of the shear resistant part; horizontal coordinate paper 13 is laid on the additional steel plate 6; the guide rail 10 is fixed above the test bed or the additional steel plate along the horizontal direction and corresponds to the collecting point of the shear resistant part 7, the pointer 11 is sleeved on the guide rail 10 and can slide on the guide rail 10, the tail end of the pointer 11 is opposite to the collecting point, and the contact of the dial indicator 12 is abutted to the end part of the pointer.
The vertical acquisition unit comprises a vertical plate and vertical coordinate paper 14; the vertical plate is vertically arranged and located on the opposite side of the guide rail, and the vertical coordinate paper 14 is arranged on the vertical plate and used for identifying the effective displacement of the collecting point in the vertical direction.
In the embodiment, as shown in fig. 1 and 2, a practical shear-resistant member bearing capacity test device mainly comprises a loading control device and a measurement acquisition device; one side of the shear resistant part is fixed with a dial indicator through a magnetic dial indicator frame, and horizontal coordinate paper 13 is arranged on the additional steel plate; a vertical plate vertical to the additional steel plate is fixed on the other side of the base, and vertical coordinate paper 14 is arranged on the vertical plate; and a steel strand is fixed at the outer end part of the shearing resistant part. Passes through the fixed pulley 5 and is connected with the piston rod 3 of the jack. When the piston rod 3 is retracted, the steel wire rope is pulled, the shearing resistant part is subjected to shearing force, and through the change of the number of the dial indicator 12 and the projection of the shearing resistant part 7 on the coordinate paper 13 in the horizontal direction and the vertical direction, the relative effective displacement of the shearing resistant part 7 at each moment in a stressed state, the motion track in the vertical direction and the like can be obtained.
The specific implementation steps are as follows:
before use, checking whether all parts of the hydraulic jack are normal or not, and mainly checking whether oil leaks at the positions of a piston, a joint, a high-pressure hose and the like or not; whether the fixed pulley is fixedly connected with the ground or not is checked, the pulley rolls without friction, and whether the pointer can freely move left and right in the pointer sliding groove or not is checked; the flexibility of measuring the movement of the dial indicator stem is checked.
And (2) fixing the shear resistant part 7 on the test table top 1, and connecting and fixing the shear resistant part on the test table through 4 groups of fastening bolts 8. Checking the locking condition of the bolt, and ensuring that the additional steel plate 6 is not in complete contact with the test table board 1 in the test process; horizontal coordinate paper is arranged on the plane of the additional steel plate 6, a magnetic meter frame is respectively fixed at the position close to the edge of one side of the additional steel plate 6, and the pointer chute 10 is arranged on the magnetic meter frame 9. Fixing a dial indicator 12 by using a magnetic indicator frame 9 on the same side, wherein a contact of the dial indicator 12 points to the root of the pointer 11, and the end of the pointer 11 just points to a collecting point at the central position of the outer end of the shear-resistant part 7; and a vertical plate vertical to the additional steel plate is fixed on the other side by two groups of magnetic meter frames 9, coordinate paper 13 is arranged on the vertical plate, and the initial positions of the shearing resistant pieces 6 are marked on the horizontal coordinate paper and the vertical coordinate paper respectively.
And (3) fixing the jack 2 on the shear wall, wherein one end of the steel strand is connected with the center of a piston rod 3 of the jack and bypasses a fixed pulley 5, and the other end of the steel strand is connected with the outer end part of a shearing resistant part 7, so that the two ends of the steel strand are firmly connected.
And (4) carrying out test loading as load control so as to observe the effective displacement generated by the shear resistant part 7 in real time.
The test loading mode is as follows: the oil pump is used for pressurizing, and the applied load is judged by observing the load representation number matched with the oil pump. The test adopts a method of increasing from small to large step by step to control the load. When the piston rod is retracted, the shearing resistant piece fixed at the other end of the steel strand is pulled. Observing whether the shearing resistant piece generates displacement in the vertical direction and the horizontal direction, and recording projection points of the shearing resistant piece at each moment on coordinate paper; the pointer connected with the dial indicator contact can reflect the stress deformation condition of the shear-resistant part in real time, and the reading is relatively accurate; the two loads are applied at an interval of about 3min, and the loads are gradually increased. When the loading is carried out in the middle and later stages, the relative displacement change of the shearing resistant piece is relatively large, and the loading can be controlled in a small amplitude manner until the test piece is damaged; the shearing resistance bearing capacity of the shearing resistant piece at each moment and the corresponding relative effective displacement in the horizontal direction, the corresponding relative effective displacement in the vertical direction and the motion trail of the shearing resistant piece in the deformation process can be obtained through tests; obtaining the shearing resistance limit bearing capacity and the relative displacement of the single shearing resistance piece; and obtaining a load displacement curve synchronous with the test in the vertical direction and the horizontal direction through the shear-resistant bearing capacity and the relative displacement of the shear-resistant bearing capacity at each moment, and further analyzing the action and influence of the shear-resistant piece in the assembled steel member-concrete combined member and structure.
In summary, the test device and the test method of the present invention can effectively obtain the shear-resisting bearing capacity of the shear-resisting member at each moment, the corresponding relative effective displacement and trajectory in the vertical direction and the horizontal direction, and can also obtain the shear-resisting limit bearing capacity of the individual shear-resisting member, the relative displacement thereof, and the like. And moreover, the shearing resistance of the single shearing resistant part can be fully analyzed, and the contribution rate service of the shearing resistant part to the assembled component or structure is analyzed. In addition, the method can be used for analyzing the cooperative working performance and the like of combined members and structures such as concrete, shearing resistant pieces, steel parts and the like. Therefore, the test device and the test method can provide a new thought and way for better researching the mechanical property of the shear-resistant piece. The obtained test result can provide important basis and reference for the application and popularization of the shear resistant part in the assembled component and structure, and has certain research and practical engineering significance and the like.
Example 2: this example is substantially the same as example 1, except that: the present embodiment further defines the arrangement manner of the collection points.
The collecting point is provided with a mounting hole, a laser emitting head is fixed in the rotating hole, a detecting head is arranged on the back face of the vertical coordinate paper, and the detecting head can collect a path and displacement on the laser emitting head.
In the embodiment, the laser emitting head is arranged at the collecting point, the size of the laser emitting head is small, the weight is light, the influence on the bearing capacity test of the shearing resistant piece is small, laser can be emitted to the vertical coordinate paper, the laser is applied to the coordinate paper, a tester can conveniently apply point application to the coordinate paper, meanwhile, the detecting head can record a path walking image of laser displacement, and a walking path of the laser on the vertical coordinate paper is extracted after processing; the laser emitting head in this embodiment is also applicable to horizontal coordinate paper, and will not be described in detail.
In the embodiment, the specifications of the horizontal coordinate paper and the vertical coordinate paper are consistent, the displacement in the X direction is further quantified through the dial indicator, the measurement precision is improved, the effective displacement on the coordinate paper is obtained through conversion, and the effective displacement in the Y direction is used as a standard to judge and judge the effective displacement in the Y direction, so that the detection precision is improved.
Example 3: this example is substantially the same as example 1, except that: the present embodiment further describes the structure of the pointer.
The pointer points to the acquisition point in an initial state, the pointer can be driven to slide in the guide rail along with the displacement of the acquisition point, a reference rod is vertically arranged at the tail end of the pointer downwards in order to conveniently mark the position of the acquisition point, when the pointer is moved, the reference rod corresponds to the position of the acquisition point, the pointer can be moved in place, and accurate displacement conditions can be obtained through the reading of the dial indicator.
In the invention, a piston rod of the jack is connected with the fixed pulley through a steel stranded rope, and the other end of the piston rod is connected to the outer end part of the shear resistant part. When the piston rod moves reversely, the shearing resistant piece is driven, so that the shearing resistant piece is subjected to a shearing action; along with the gradual increase of the oil pressure, the deformation of the shearing resistant part is more obvious. Recording the projection points of the shear resistant piece at each moment on coordinate paper in the horizontal direction and the vertical direction of the shear resistant piece, and obtaining the corresponding displacement of each moment; the motion trail of the shear resistant part in the deformation process in the vertical direction can be obtained; the scale pointer connected with the dial indicator contact can reflect the relative effective displacement of the shearing resistant part in real time, and the reading is relatively accurate; the test can also obtain the shear resistance limit bearing capacity and the relative displacement of the single shear resistant piece; and obtaining a load displacement curve synchronous with the test in the vertical direction and the horizontal direction through the shearing resistance and the relative displacement of the shearing resistance and the bearing capacity at each moment. The characteristics of the single shear piece such as the shear resistance, the contribution rate service of the participating component or structure and the like can be fully analyzed through the load displacement curve. The test device can provide a new detection method for measuring the ultimate shear-resisting bearing capacity and effective deformation of the shear-resisting piece, the motion tracks in two directions and the like. The test method is relatively simple, the data is relatively accurate, and the available test parameters are relatively more. The measured objects, the number and the positions of the shear pieces are not unique, and the method has greater feasibility and applicability.
Claims (6)
1. The utility model provides a practical shear member bearing capacity test device which characterized in that: comprises a loading control device and a measurement acquisition device; the loading control device comprises a hydraulic traction rod, a steel stranded rope and a guide wheel, the hydraulic traction rod is arranged along the horizontal direction, and the starting end of the steel stranded rope is fixed on a rod body of the hydraulic traction rod and is fixed on the shear resistant part after being guided by the guide wheel; the measurement acquisition device comprises a horizontal acquisition unit and a vertical acquisition unit; the horizontal acquisition unit comprises a pointer, a guide rail, a dial indicator and horizontal coordinate paper; the additional steel plate is fixed on the test bed along the horizontal direction, the shear resistant piece is provided with a collection point, and the horizontal coordinate paper is laid on the additional steel plate; the guide rail is fixed above the test bed or the additional steel plate along the horizontal direction and corresponds to the collecting point of the shear-resistant piece, the pointer is sleeved on the guide rail and can slide in a guiding way, the tail end of the pointer is opposite to the collecting point, and the contact of the dial indicator is abutted to the end part of the pointer; the vertical acquisition unit comprises a vertical plate and vertical coordinate paper; the vertical plate is vertically arranged and located on the opposite side of the guide rail, and the vertical coordinate paper is arranged on the vertical plate and used for marking the effective displacement of the collecting point in the vertical direction.
2. The utility model shear test device of claim 1, characterized in that: the collecting point is provided with a mounting hole, a laser emitting head is fixed in the rotating hole, a detecting head is arranged on the back face of the vertical coordinate paper, and the detecting head can collect a path and displacement on the laser emitting head.
3. The utility model shear test device of claim 1, characterized in that: the dial indicator is fixed on the additional steel plate through the magnetic gauge stand.
4. The utility model shear test device of claim 1, characterized in that: and the four corners of the additional steel plate are fixed on the test table board through fastening bolts.
5. The utility model shear test device of claim 1, characterized in that: the hydraulic traction rod is a separated type hydraulic jack with bidirectional action, and an oil pressure gauge is arranged on the hydraulic traction rod.
6. The utility model shear test device of claim 1, characterized in that: the guide wheel is flush with the end part of the hydraulic traction rod, so that the force application section of the steel stranded rope is in a horizontal state.
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