CN216718001U - Bending resistance and shearing resistance test device for prefabricated hollow slab - Google Patents
Bending resistance and shearing resistance test device for prefabricated hollow slab Download PDFInfo
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- CN216718001U CN216718001U CN202123385386.7U CN202123385386U CN216718001U CN 216718001 U CN216718001 U CN 216718001U CN 202123385386 U CN202123385386 U CN 202123385386U CN 216718001 U CN216718001 U CN 216718001U
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000005452 bending Methods 0.000 title claims abstract description 20
- 238000010008 shearing Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 26
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
The utility model discloses a bending resistance and shearing resistance test device of a prefabricated hollow slab, which comprises a ground beam, a rack fixed on the ground beam, a counter-force beam with two ends connected to the rack, a first distribution beam connected to the counter-force beam through a telescopic mechanism, a second distribution beam connected to the bottom of the first distribution beam through an upright post, a steel stool positioned on the ground beam and a support which is placed on the steel stool and can slide on the steel stool, wherein the width of the second distribution beam is equal to that of the prefabricated hollow slab, and the ground beam is provided with a plurality of groups of mounting holes of the steel stool so that the steel stool can be fixed on different positions of the ground beam. According to the utility model, the longitudinal stress condition of the precast hollow slab is simulated by arranging the first distribution beam and the second distribution beam, the transverse stress condition of the precast hollow slab is simulated by the slidable support, and the precast hollow slab is truly simulated in practical application, so that the test precision of the precast hollow slab is improved.
Description
Technical Field
The utility model relates to the technical field of bending and shearing resistance tests, in particular to a bending and shearing resistance test device for a prefabricated hollow slab.
Background
In the present day that the transportation industry is increasingly developed, the bridge plays a vital role, in roads and urban roads in China, small and medium-sized bridges occupy a large specific gravity, in all small and medium-sized bridges, the concrete hollow bridge slab is one of the bridge types which are particularly commonly used, and compared with other sections, the section of the hollow slab has the advantages of large torsional rigidity, good stability and the like.
In the existing bridge construction, the upper structural beam slab mostly adopts a construction method of hoisting by a bridge girder erection machine after prefabrication, after the prefabricated hollow beam slab is finished according to a design drawing and a standard requirement, whether the actual stress condition meets the requirement needs to select a sample to carry out on-site loading test and comprehensive analysis on test observation data and test objects, so that the rigidity, the bearing capacity and the like of the bridge structure in the actual working state can be generally evaluated. But the bending resistance and shearing resistance test device of the current hollow slab precast hollow slab has poor precision and low test efficiency, and cannot meet the requirement of high quality.
SUMMERY OF THE UTILITY MODEL
Aiming at the problem of low precision of the precast hollow slab during the bending and shearing resistance test, the utility model provides the bending and shearing resistance test device of the precast hollow slab, which improves the test precision by simulating the real stress condition of the precast hollow slab on the highway bridge.
In order to achieve the above object, the present invention provides a bending and shearing resistance test device for a precast hollow slab, which includes a floor beam, a frame fixed on the floor beam, a reaction beam having two ends connected to the frame, a first distribution beam connected to the reaction beam through a telescopic mechanism, a second distribution beam connected to the bottom of the first distribution beam through an upright, a steel stool positioned on the floor beam, and a support placed on the steel stool and capable of sliding on the steel stool, wherein the second distribution beam has the same width as the precast hollow slab, and the floor beam is provided with a plurality of sets of mounting holes for the steel stools, so that the steel stools can be fixed at different positions on the floor beam.
Specifically, telescopic machanism's bottom is connected with the actuator that can freely stretch out and draw back, the actuator bottom is equipped with the pressure sensor with first distribution beam fixed connection.
Preferably, the telescopic mechanism is provided in plurality and symmetrically arranged.
Preferably, a backing plate is attached to the bottom of the second distribution beam.
Further, the support include first reinforcing bar and with first reinforcing bar fixed connection's steel sheet, the fixed surface of bench is equipped with two at least edges the second reinforcing bar that the hollow slab width direction of prefabrication extends, the diameter of second reinforcing bar is less than the diameter of first reinforcing bar, first reinforcing bar is located two between the second reinforcing bar, the width of steel sheet is greater than a pair of distance between the second reinforcing bar.
Preferably, be equipped with the multiunit spout on the grade beam, the both sides of spout are equipped with the multiunit the mounting hole, the steel bench bottom is equipped with can the adaptation and is in the gyro wheel in the spout.
Through the technical scheme, the utility model has the following beneficial effects:
1. the first distribution beam and the second distribution beam are arranged to simulate the longitudinal stress condition of the precast hollow slab, the slidable support is used for simulating the transverse stress condition of the precast hollow slab, and the precast hollow slab is truly simulated in practical application so as to improve the test precision of the precast hollow slab; the steel stool is adjustable in position on the ground beam, not only can be suitable for testing of hollow core slabs of different specifications, but also can be used as a bending resistance testing device and a shearing resistance testing device, and the practicability of the device is improved.
2. In a preferred technical scheme of the utility model, the support comprises a first steel bar and a steel plate fixedly connected with the first steel bar, at least two second steel bars extending along the width direction of the hollow slab are fixedly arranged on the surface of the steel stool, the diameter of each second steel bar is smaller than that of each first steel bar, the first steel bar is positioned between the two second steel bars, the width of the steel plate is larger than the distance between the pair of second steel bars, and the first steel bars can slide between the two second steel bars so as to simulate the transverse stress condition of the hollow slab.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in a bending test state;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is an enlarged schematic view at A in FIG. 1;
FIG. 4 is a schematic structural view of the ground beam of the present invention;
FIG. 5 is a schematic view of the shear test of the present invention.
Description of the reference numerals
1 frame, 2 counter-force beams, 3 first distribution beams, 4 telescopic mechanisms, 6 actuators, 7 pressure sensors, 8 upright posts, 9 second distribution beams, 10 backing plates and 11 prefabricated hollow plates
12 ground beam, 121 mounting hole and 122 sliding groove
13 steel stool, 131 second steel bar
14 cushions, 141 first steel bars, 142 steel plates
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, in the following description, for the purpose of clearly explaining the technical solution of the present invention, directional terms such as "upper", "lower", and the like have meanings according to the orientation that the components in the experimental device normally refer to, for example, the reaction beam is located at the upper position, the ground beam is located at the lower position, and the description is only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first", "second" may explicitly or implicitly include one or more of the features described.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 5, the bending and shearing resistance test device for a prefabricated hollow slab according to the present invention includes a ground beam 12, a frame 1 fixed on the ground beam 12, a reaction beam 2 having both ends connected to the frame 1, a first distribution beam 3 connected to the reaction beam 2 through a telescopic mechanism 4, a second distribution beam 9 connected to the bottom of the first distribution beam 3 through an upright post 8, a steel stool 13 located on the ground beam 12, and a support 14 placed on the steel stool 13 and capable of sliding on the steel stool 13, wherein the second distribution beam 9 has the same width as the prefabricated hollow slab 11, and the ground beam 12 is provided with a plurality of sets of mounting holes 121 of the steel stool 13, so that the steel stool 13 can be fixed on different positions of the ground beam 12. The present invention transfers the pressure uniformly to the second distribution beams 9 through the first distribution beams 3 and then to the surface of the precast hollow slab 11 through the second distribution beams 9.
According to the utility model, the longitudinal stress condition of the precast hollow slab 11 is simulated by arranging the first distribution beams 3 and the second distribution beams 9, the transverse stress condition of the precast hollow slab 11 is simulated by the slidable support 14, and the precast hollow slab 11 is truly simulated in practical application, so that the test precision of the precast hollow slab 11 is improved. The steel stool 13 is adjustable in position on the ground beam 12, not only can be suitable for testing the hollow core slabs 11 of different specifications, but also can be used as a bending resistance testing device and a shearing resistance testing device, and the practicability of the device is improved. As shown in fig. 1, the steel stools 13 are symmetrically arranged at two sides of the frame 1, so that the middle of the prefabricated hollow slab 11 can be forced to realize bending resistance detection; as shown in fig. 5, by placing one of the steel stools 13 right under the distribution beam, it is possible to apply force to the near edge of the precast hollow slab 11 to perform shear detection.
The bottom of telescopic machanism 4 is connected with actuator 6 that can freely stretch out and draw back, 6 bottoms of actuator are equipped with the pressure sensor 7 with first distribution beam 3 fixed connection. Telescopic machanism 4 can be hydro-cylinder, electric telescopic handle etc. and pressure sensor 7 is used for the monitoring to the application of force condition of prefabricated hollow slab 11 to realize accurate test.
The telescopic mechanism 4 is provided with a plurality of symmetrical arrangements, so that the stability of the device is improved, and the load application range of the first distribution beam 3 is enlarged.
The bottom of the second distribution beam 9 is connected with a backing plate 10, which prevents the second distribution beam 9 from directly contacting the precast hollow slab 11 and thus wear of the second distribution beam 9, which prolongs its service life.
The bottom surface of the second distribution beam 9 is rectangular or square, and the second distribution beams 9 are designed into different shapes, so that the device can be adapted to different application occasions, and can be matched with precast hollow slabs 11 with different widths, and the application range of the device is expanded.
Specifically, the support includes a first reinforcing bar 141 and a steel plate 142 fixedly connected to the first reinforcing bar 141, at least two second reinforcing bars 131 extending along the width direction of the hollow slab 11 are fixedly disposed on the surface of the steel stool 13, the diameter of the second reinforcing bar 131 is smaller than that of the first reinforcing bar 141, the first reinforcing bar 141 is located between the two second reinforcing bars 131, and the width of the steel plate 142 is greater than the distance between a pair of the second reinforcing bars 131. The first reinforcing bars 141 can slide between the two second reinforcing bars 131 to simulate the lateral stress of the hollow core slab 11.
On the basis of the above technical solution, as shown in fig. 4, a plurality of sets of sliding grooves 122 are arranged on the ground beam 12, a plurality of sets of mounting holes 121 are arranged on two sides of the sliding grooves 122, and rollers capable of being adapted to the sliding grooves 122 are arranged at the bottom of the steel stool 13. The gyro wheel makes the bench 13 advance along the surface of grade beam 12 after sliding along spout 122, drives bench 13 and moves along the surface of grade beam 12 to make the different positions in precast hollow board 11 surface obtain the suppression, promote experimental homogeneity when promoting test efficiency. During the testing process, the roller is locked by a locking mechanism, wherein the roller locking mechanism is a conventional technique and is not described herein.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. The bending resistance and shearing resistance test device of the precast hollow slab is characterized by comprising a ground beam (12), a rack (1) fixed on the ground beam (12), a counter-force beam (2) with two ends connected to the rack (1), a first distribution beam (3) connected to the counter-force beam (2) through a telescopic mechanism (4), a second distribution beam (9) connected to the bottom of the first distribution beam (3) through an upright post (8), a steel stool (13) positioned on the ground beam (12) and a support (14) which is placed on the steel stool (13) and can slide on the steel stool (13), the second distribution beams (9) have the same width with the prefabricated hollow slab (11), a plurality of groups of mounting holes (121) of the steel stools (13) are arranged on the ground beams (12), so that the steel stool (13) can be fixed on different positions of the ground beam (12).
2. The bending and shearing resistance test device for the precast hollow slab as recited in claim 1, wherein the bottom of the telescoping mechanism (4) is connected with an actuator (6) which can freely telescope, and the bottom of the actuator (6) is provided with a pressure sensor (7) fixedly connected with the first distribution beam (3).
3. The apparatus for bending and shearing resistance of a hollow core slab as claimed in claim 1, wherein the plurality of the expansion means (4) are symmetrically arranged.
4. Bending and shear test unit for precast hollow slabs according to claim 1, wherein a tie plate (10) is attached to the bottom of the second distribution beam (9).
5. The bending and shearing resistance test device of the hollow slab as claimed in claim 1, wherein the support comprises a first reinforcing bar (141) and a steel plate (142) fixedly connected with the first reinforcing bar (141), at least two second reinforcing bars (131) extending in a width direction of the hollow slab (11) are fixedly arranged on the surface of the steel stool (13), the diameter of the second reinforcing bars (131) is smaller than that of the first reinforcing bar (141), the first reinforcing bar (141) is positioned between the two second reinforcing bars (131), and the width of the steel plate (142) is larger than the distance between a pair of the second reinforcing bars (131).
6. The bending and shearing resistance test device for the precast hollow slab as recited in any one of claims 1 to 5, wherein a plurality of sets of sliding grooves (122) are formed on the ground beam (12), a plurality of sets of the mounting holes (121) are formed on both sides of the sliding grooves (122), and rollers capable of being fitted in the sliding grooves (122) are formed at the bottom of the steel stool (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385386.7U CN216718001U (en) | 2021-12-30 | 2021-12-30 | Bending resistance and shearing resistance test device for prefabricated hollow slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385386.7U CN216718001U (en) | 2021-12-30 | 2021-12-30 | Bending resistance and shearing resistance test device for prefabricated hollow slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216718001U true CN216718001U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123385386.7U Active CN216718001U (en) | 2021-12-30 | 2021-12-30 | Bending resistance and shearing resistance test device for prefabricated hollow slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216718001U (en) |
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2021
- 2021-12-30 CN CN202123385386.7U patent/CN216718001U/en active Active
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Effective date of registration: 20240330 Address after: Building 2, No.1 Huasheng Road, High tech Industrial Development Zone, Yangzhou City, Jiangsu Province, 225000 Patentee after: Yangzhou Fengzhu Construction Engineering Co.,Ltd. Country or region after: China Address before: 225000 No.1, Huasheng Road, high tech Industrial Development Zone, Yangzhou City, Jiangsu Province Patentee before: Jiangsu Fenghua construction system integration Co.,Ltd. Country or region before: China |
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