CN216433337U - In-situ self-reaction testing device for transverse shearing of embedded channel - Google Patents
In-situ self-reaction testing device for transverse shearing of embedded channel Download PDFInfo
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- CN216433337U CN216433337U CN202122959173.4U CN202122959173U CN216433337U CN 216433337 U CN216433337 U CN 216433337U CN 202122959173 U CN202122959173 U CN 202122959173U CN 216433337 U CN216433337 U CN 216433337U
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Abstract
The utility model discloses an in-situ self-reaction force testing device for transverse shearing of a pre-buried channel, which comprises a reaction beam, two reaction fixed supports, two force transmission rods, a force sensor and a force transmission box, the sleeve, the displacement sensor, the connective bar, application of force mechanism, the sleeve is fixed in the shearing test point of pre-buried channel, it establishes outside the sleeve to pass the power box cover, force sensor connects power box and connective bar, the connective bar with counter-force crossbeam sliding connection and with application of force mechanism fixed connection and receive application of force mechanism can order about with counter-force crossbeam relative motion, two counter-force fixing support divide symmetrically to establish in the both sides of this shearing test point and with pre-buried channel fixed connection, two pass the both sides that the stick symmetry was established at this connective bar, the one end and counter-force crossbeam fixed connection and the other end top of two power bars support pre-buried channel, the displacement sensor is used for measuring the displacement distance of horizontal shearing test point. The testing device has the advantages of wide application range, few components, easy assembly and disassembly, small volume, light weight and convenient carrying.
Description
Technical Field
The utility model relates to a civil engineering detects uses the device, especially relates to a horizontal normal position self-reaction testing arrangement who shears of embedded channel.
Background
The transverse shearing bearing capacity of the embedded channel is an important mechanical index of the embedded channel in the embedded channel and concrete combination, and the mechanical property of the embedded channel in the embedded channel and the concrete combination can be more objectively reflected by carrying out in-situ measurement on the transverse shearing bearing capacity of the embedded channel. At present, an in-situ test device for transverse shearing bearing capacity of an embedded channel mainly comprises a force application mechanism and a counterforce mechanism, wherein the counterforce mechanism is mainly fixed on a combined body by adopting expansion bolts or adopts a mode of erecting a counterforce frame. And part of the ex-situ testing devices are used for independently fixing the channel on an instrument to simulate the actual use condition of the embedded channel and then applying shearing force to detect by using a shearing sleeve.
The most main problems of the existing transverse shearing in-situ test device for the embedded channel are reflected on a counterforce mechanism: the use of expansion bolts to secure the reaction frame can result in permanent damage to the assembly. The mode of setting up the reaction frame is adopted, the reaction frame is large in size, the installation process is complicated, the in-situ test of a small-sized assembly can be carried out only, and the in-situ test requirement of a large-size or continuous assembly cannot be met.
In addition, the existing transverse shearing test device for the embedded channel is large in size, heavy in structure and very poor in portability.
SUMMERY OF THE UTILITY MODEL
The utility model provides a horizontal normal position self-reaction testing arrangement who shears of embedded channel, it has overcome in the background art the not enough of prior art.
The utility model provides a technical scheme that its technical problem adopted is:
an in-situ self-reaction testing device for transverse shearing of a pre-buried channel comprises a self-reaction module, a stress application module and a data acquisition module, wherein the self-reaction module comprises a reaction cross beam, two reaction fixing supports and two force transmission rods, the stress application module comprises a force transmission box, a sleeve, a connecting rod and a force application mechanism, the data acquisition module comprises a force sensor and a displacement sensor, a central hole of the sleeve is aligned to a shearing test point, the central axis of the sleeve is vertical to the pre-buried channel, the sleeve and the pre-buried channel are fixedly connected through a first bolt and a first nut which are arranged at the shearing test point, the force transmission box is sleeved on the outer periphery of the sleeve, two tension ends of the force sensor are respectively connected with one end of the force transmission box and one end of the connecting rod, the other end of the connecting rod penetrates through the reaction cross beam and is in sliding connection with the reaction cross beam, the other end of the connecting rod is connected with the force application mechanism and limits the reaction cross beam between the force application mechanism and the pre-buried channel 100, this application of force mechanism can order about the connective bar and counter-force crossbeam relative motion makes the connective bar deviate from shearing test point motion and counter-force crossbeam moves towards shearing test point, this connective bar, two drawing ends of force sensor, the line of shearing test point is a straight line and this sharp perpendicular to telescopic central axis and pre-buried channel, these two counter-force fixing support divide symmetrically to establish in the both sides of this shearing test point and with pre-buried channel fixed connection, these two power transmission stick are parallel and the symmetry with this connective bar divides to establish in the both sides of this connective bar, the one end and counter-force crossbeam fixed connection and the other end top of these two power transmission sticks support pre-buried channel, this displacement sensor is used for measuring this horizontal shearing test point towards the displacement distance of horizontal shearing direction.
In one embodiment: still include polytetrafluoroethylene packing ring, this polytetrafluoroethylene packing ring is arranged in and is passed between power box and the pre-buried channel.
In one embodiment: the two counter-force fixing supports are respectively provided with a blind hole, and the other ends of the two force transmission rods are correspondingly arranged in the two blind holes and are propped against the blind ends of the blind holes.
In one embodiment: each counter-force fixing support is fixedly connected with the embedded channel through a plurality of second bolts and second nuts which are uniformly distributed along the embedded channel at intervals.
In one embodiment: the force sensor is an S-shaped force sensor.
In one embodiment: the first bolt is a T-shaped bolt.
In one embodiment: the second bolt is a T-shaped bolt.
In one embodiment: this application of force mechanism includes rotary operation spanner and force application nut, and the external screw thread has been attacked to the other end of this connective bar, and this force application nut and the other end spiro union of this connective bar make the reaction beam spacing between application of force mechanism and pre-buried channel 100, this rotary operation spanner and this force application nut adaptation are connected.
In one embodiment: the force application mechanism is a through hydraulic jack, and the through hydraulic jack is connected with the other end of the connecting rod and abuts against the counter-force cross beam.
Compared with the background technology, the technical scheme has the following advantages:
1. the present case normal position testing arrangement can test the horizontal bearing capacity of pre-buried channel on the assembly of pre-buried channel and concrete directly, does not cause destruction to pre-buried channel and concrete assembly in the experimentation, and normal position testing arrangement is applicable to the horizontal bearing capacity test of pre-buried channel in the assembly on different shape surfaces, and not being in the plane, like the pre-buried channel of shear force wall, also can be applicable to the section of jurisdiction of specific radian.
2. The whole set of testing device has few components, simple structure, clear force transmission path, easy assembly and disassembly, small volume, light weight and convenient carrying.
3. The hole polytetrafluoroethylene gasket is arranged between the force transmission box and the embedded channel, so that friction among the force transmission box, the sleeve and the concrete surface of the combined body can be effectively reduced, and the testing precision is improved.
4. Force is transmitted to the first bolt of the shearing test point of the embedded channel through the force transmission box and the sleeve, and concentrated stress and bending moment of the first bolt caused by transverse tension in the shearing test process are reduced to the maximum extent.
5. Each counter-force fixing support and the embedded channel are fixedly connected through a plurality of second bolts and second nuts which are arranged at uniform intervals along the embedded channel, a plurality of fixed points are formed between the counter-force fixing supports and the embedded channel, the force transmitted to the embedded channel through the counter-force fixing supports in the effective dispersion test process is uniform in counter-force stress.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of an in-situ self-reaction force testing device for transverse shearing of an embedded channel.
Fig. 2 is a reaction force diagram inside the in-situ self-reaction force testing device with a transverse shearing embedded channel.
Detailed Description
Referring to fig. 1, an in-situ self-reaction testing device for transverse shearing of an embedded channel comprises a self-reaction module, a force application module and a data acquisition module, wherein the self-reaction module comprises a reaction beam 1, two reaction fixing supports 2 and two force transmission rods 3, the force application module comprises a force transmission box 5, a sleeve 6, a connecting rod 8 and a force application mechanism 9, the data acquisition module comprises a force sensor 4 and a displacement sensor 7, a central hole of the sleeve 6 is aligned with a shearing test point, a central axis of the sleeve 6 is vertical to the embedded channel 100, the sleeve 6 is fixedly connected with the embedded channel 100 through a first bolt 101 and a first nut 102 which are arranged at the shearing test point, the force transmission box 5 is sleeved on the outer periphery of the sleeve 6, two tension ends of the force sensor 4 are respectively connected with one end of the force transmission box 5 and one end of the connecting rod 8, the other end of the connecting rod 8 penetrates through the reaction beam 1 and is connected with the reaction beam 1 in a sliding manner, the other end of the connecting rod 8 is connected with the force applying mechanism 9 and limits the counter-force beam 1 between the force applying mechanism 9 and the pre-buried channel 100, the force applying mechanism 9 can drive the connecting rod 8 and the counter-force beam 1 to move relatively to enable the connecting rod 8 to move away from the shearing test point and the counter-force beam 1 to move towards the shearing test point, the connecting rod 8 and the force sensor 4 are connected by a straight line, the connecting line of the shearing test point and the shearing test point is a straight line, the straight line is perpendicular to the central axis of the sleeve 6 and the pre-buried channel 100, the two counter-force fixing supports 2 are symmetrically arranged on two sides of the shearing test point and are fixedly connected with the pre-buried channel 100, the contact surface of the counter-force fixing supports in contact with the pre-buried channel is matched with the surface (generally an arc surface) of the duct piece of the pre-buried channel, the two counter-force fixing supports 2 have a spacing distance with the shearing test point, the two force transmission rods 3 and the connecting rod 8 are parallel and symmetrically arranged on two sides of the connecting rod 8, one end of each of the two force transfer rods 3 is fixedly connected with the reaction beam 1, the other end of each of the two force transfer rods props against the embedded channel 100, and the displacement sensor 7 is used for measuring the moving distance of the transverse shearing test point in the transverse shearing direction. The movement of the shear test point is synchronous with the movement of the sleeve 6 and the force transfer box 5, so that the measurement of the movement distance of the shear test point can be converted into the measurement of the movement distance of the force transfer box 5.
The testing device further comprises a polytetrafluoroethylene gasket 10, wherein the polytetrafluoroethylene gasket 10 is arranged among the force transmission box 5, the sleeve and the embedded channel 100 and used for reducing friction among the force transmission box 5, the sleeve 6 and the concrete surface of the combined body and improving testing precision. The polytetrafluoroethylene gasket and the surface of the force transmission box matched with the embedded channel are matched with the surface (generally an arc surface) of a duct piece of the embedded channel. The sleeve is cylindrical, the force transmission box is provided with a column hole matched with the sleeve body of the sleeve, the sleeve is arranged in the column hole, and the sleeve is cylindrical, so that the problem of stress concentration formed between the force transmission box and the sleeve in the force transmission process between the force transmission box and the sleeve can be reduced.
The two counter-force fixing supports 2 are respectively provided with a blind hole, and the other ends of the two force transmission rods 3 are correspondingly arranged in the two blind holes and are propped against the blind ends of the blind holes.
Each reaction force fixing support 2 is fixedly connected with the embedded channel 100 through a plurality of second bolts 201 and second nuts 202 which are uniformly distributed along the embedded channel 100 at intervals, a plurality of fixed points are formed, load distribution between the reaction force fixing supports 2 and the embedded channel 100 is dispersed, generally, the number of the fixed points on the two reaction force fixing supports 2 is equal, and the interval distance between the fixed points on each reaction force fixing support 2 is equal.
In this embodiment, the force sensor 4 is an S-shaped force sensor. The first bolt 101 is a T-bolt. The second bolt 201 is a T-bolt.
An in-situ test method for transverse shearing of a pre-buried channel adopts the in-situ test device; the method comprises the following operation steps:
firstly, pre-tightening the whole in-situ testing device through a force application mechanism 9 to enable all parts of the whole in-situ testing device to be in close contact, and eliminating virtual displacement among all parts, wherein the virtual displacement comprises gap displacement between a force transmission rod 3 and a counter force fixed support 2; specifically, the force application mechanism 9 drives the connecting rod 8 to move downwards, and meanwhile, the counter-force beam 1 moves upwards relative to the connecting rod 8 and pushes against the counter-force fixed supports 2 on two sides.
Then, the connecting rod 8 is pulled to move downwards relative to the reaction beam 1 by the force applying mechanism 9 again, the reaction beam 1 moves upwards relative to the connecting rod 8 and jacks up the reaction force fixing supports 2 at two sides, the shearing test point of the embedded channel 100 is driven to move downwards and the two sides of the shearing test point move upwards (the acting force of the connecting rod on the shearing test point of the embedded channel 100 is transmitted through a force transmission box, a sleeve and a first bolt), after the shearing test point moves downwards to reach a set distance by the displacement sensor 7, the force applying mechanism keeps the force currently applied to the connecting rod constant, the embedded channel 100 forms a self-reaction force on the in-situ testing device in order to overcome self-deformation, when the self-reaction force is formed, please refer to the graph 2, the force applied to the reaction beam 1 is equal to and opposite to the force applied to the two reaction force fixing supports 2, the connecting rod 8 and the force sensor 4 are subjected to tensile stress, and the magnitude of the tensile force formed by the tensile stress is reflected by the transverse shearing bearing force applied to the embedded channel 100, therefore, the magnitude of the self-reaction force can be measured by the force sensor 4. The "up" and "down" in the up and down movement merely indicate a pair of opposite directions.
In a preferred embodiment, the force applying mechanism 9 includes a rotating operation wrench 92 and a force applying nut 91, the other end of the connecting rod 8 is tapped with an external thread, the force applying nut 91 is screwed with the other end of the connecting rod 8 to limit the reaction beam 1 between the force applying mechanism 9 and the pre-embedded channel 100, and the rotating operation wrench is connected with the force applying nut 91 in a matching manner. During the application of force, the forcing nut 91 is rotated by rotating the operation wrench, so that the forcing nut 91 rotates relative to the connecting rod 8 and drives the reaction beam 1 to move upward along the connecting rod 8 and relative to the connecting rod 8, and then the connecting rod 8 moves downward relative to the reaction beam 1. In this embodiment, the rotational torque of the rotational operation wrench 92 is converted into an upward pushing force against the reaction beam 1 against the reaction force fixing brackets.
In another preferred embodiment, the force applying mechanism is a hydraulic jack, which is connected to the other end of the connecting rod 8 and abuts against the reaction beam 1. When force is applied, the penetrating hydraulic jack pulls the connecting rod 8 downwards to enable the connecting rod 8 to move downwards relative to the counterforce cross beam 1, meanwhile, the connecting rod 8 pulls the shear test point of the embedded channel 100 to move downwards, and two sides of the shear test point of the embedded channel 100 move upwards relatively.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (9)
1. The utility model provides an original position self-reaction testing arrangement of transverse shearing of embedded channel which characterized in that: the self-reaction module comprises a reaction beam, two reaction fixing supports and two force transmission rods, the force application module comprises a force transmission box, a sleeve, a connecting rod and a force application mechanism, the data acquisition module comprises a force sensor and a displacement sensor, a central hole of the sleeve is aligned to a shearing test point, the central axis of the sleeve is vertical to a pre-buried channel, the sleeve is fixedly connected with the pre-buried channel through a first bolt and a first nut which are arranged at the shearing test point, the force transmission box is sleeved on the outer periphery of the sleeve, two tension ends of the force sensor are respectively connected with one end of the force transmission box and one end of the connecting rod, the other end of the connecting rod penetrates through the reaction beam and is in sliding connection with the reaction beam, the other end of the connecting rod is connected with the force application mechanism and limits the reaction beam between the force application mechanism and the pre-buried channel, the force application mechanism can drive the connecting rod and the reaction beam to move relatively to enable the connecting rod to deviate from the shearing test point, this connective bar, two drawing ends of force sensor, the line of shearing test point is a straight line and this straight line perpendicular to telescopic central axis and pre-buried channel, these two counter-force fixing support divide symmetrically to establish in the both sides of this shearing test point and with pre-buried channel fixed connection, these two power transmission stick are parallel with this connective bar and the symmetry divides to establish in the both sides of this connective bar, the one end and the counter-force crossbeam fixed connection of these two power transmission sticks and other end top support pre-buried channel, this displacement sensor is used for measuring this horizontal displacement distance of shearing test point towards horizontal shearing direction.
2. The in-situ self-reaction testing device for transverse shearing of embedded channels, according to claim 1, is characterized in that: still include polytetrafluoroethylene packing ring, this polytetrafluoroethylene packing ring is arranged in and is passed between power box and the pre-buried channel.
3. The in-situ self-reaction testing device for transverse shearing of embedded channels, according to claim 1, is characterized in that: the two counter-force fixing supports are respectively provided with a blind hole, and the other ends of the two force transmission rods are correspondingly arranged in the two blind holes and are propped against the blind ends of the blind holes.
4. The in-situ self-reaction testing device for transverse shearing of embedded channel as claimed in claim 1, characterized in that: each counter-force fixing support is fixedly connected with the embedded channel through a plurality of second bolts and second nuts which are uniformly distributed along the embedded channel at intervals.
5. The in-situ self-reaction testing device for transverse shearing of embedded channel as claimed in claim 1, characterized in that: the force sensor is an S-shaped force sensor.
6. The in-situ self-reaction testing device for transverse shearing of embedded channels, according to claim 1, is characterized in that: the first bolt is a T-shaped bolt.
7. The in-situ self-reaction testing device for transverse shearing of embedded channel as claimed in claim 4, characterized in that: the second bolt is a T-shaped bolt.
8. The in-situ self-reaction testing device for transverse shearing of embedded channels, according to claim 1, is characterized in that: this application of force mechanism includes rotary operation spanner and force application nut, and the external screw thread has been attacked to the other end of this connective bar, and this force application nut and the other end spiro union of this connective bar make the reaction beam spacing between application of force mechanism and pre-buried channel 100, this rotary operation spanner and this force application nut adaptation are connected.
9. The in-situ self-reaction testing device for transverse shearing of embedded channels, according to claim 1, is characterized in that: the force application mechanism is a through hydraulic jack, and the through hydraulic jack is connected with the other end of the connecting rod and abuts against the counter-force cross beam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122959173.4U CN216433337U (en) | 2021-11-29 | 2021-11-29 | In-situ self-reaction testing device for transverse shearing of embedded channel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122959173.4U CN216433337U (en) | 2021-11-29 | 2021-11-29 | In-situ self-reaction testing device for transverse shearing of embedded channel |
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| CN216433337U true CN216433337U (en) | 2022-05-03 |
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| CN202122959173.4U Active CN216433337U (en) | 2021-11-29 | 2021-11-29 | In-situ self-reaction testing device for transverse shearing of embedded channel |
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