CN220690661U - Test device for measuring poisson ratio of concrete by adopting dial gauge method - Google Patents
Test device for measuring poisson ratio of concrete by adopting dial gauge method Download PDFInfo
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- CN220690661U CN220690661U CN202321796144.3U CN202321796144U CN220690661U CN 220690661 U CN220690661 U CN 220690661U CN 202321796144 U CN202321796144 U CN 202321796144U CN 220690661 U CN220690661 U CN 220690661U
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a test device for measuring the poisson ratio of concrete by adopting a dial indicator method, which comprises an upper lantern ring and a lower lantern ring for measuring the vertical deformation of a concrete test piece, a middle lantern ring for measuring the transverse deformation of the concrete test piece, two long screws, four dial indicators and a plurality of bolts, wherein the device can be manufactured into different device models according to the size of the test piece. The three sets of sleeve rings are respectively and uniformly sleeved at the upper part, the middle part and the lower part of the concrete columnar test piece, the upper sleeve ring and the lower sleeve ring are mainly used for measuring the vertical deformation of the concrete test piece, and the middle sleeve ring is mainly used for measuring the transverse deformation of the concrete test piece. The device dismouting is simple and easy, convenient operation has got rid of the influence of concrete vertical deformation to transverse deformation, is favorable to accurate measurement concrete transverse and vertical deformation, reduces the influence of vertical deformation and device material intensity inadequately to transverse deformation testing result, and then has improved the accuracy of detecting concrete poisson's ratio.
Description
Technical Field
The utility model relates to a test device for measuring the Poisson's ratio of concrete, in particular to a test device for measuring the Poisson's ratio of concrete by adopting a dial indicator method, which can effectively reduce the influence of vertical deformation and insufficient material strength of the device on a transverse deformation detection result in the test process, and has the advantages of simple disassembly and convenient operation.
Background
The Poisson's ratio of concrete is an important index for evaluating the deformation resistance of concrete and is an important parameter for designing the mixing ratio of concrete. The concrete poisson ratio is the ratio of the transverse deformation to the vertical deformation of the concrete, and the current measuring instrument for the concrete poisson ratio mainly comprises a dial indicator, a displacement meter and the like, and the dial indicator is widely applied to detection tests due to simple disassembly and convenient operation.
In the process of detecting the Poisson's ratio of concrete, the detection method has the advantages that the deformation resistance of the concrete is high, the compressive strength is high, in the process of breaking the concrete, if the transverse deformation dial indicator connecting piece is connected with the collar for measuring the vertical deformation, the transverse deformation dial indicator can vertically displace to influence the measurement result of the transverse deformation, and if the deformation resistance of the transverse deformation collar is poor, the whole of the collar can transversely deform to influence the detection result of the transverse deformation of the concrete when the transverse deformation of the concrete test piece occurs.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a test device for measuring the Poisson's ratio of concrete by adopting a dial gauge method, and aims to solve the problem of influence of vertical deformation and insufficient material strength of the device on a transverse deformation detection result.
In order to solve the technical problems, the utility model adopts the following technical scheme: the test device for measuring the Poisson's ratio of the concrete by adopting the dial gauge method comprises an upper lantern ring and a lower lantern ring which are used for measuring the vertical deformation of a concrete test piece, a middle lantern ring which is used for measuring the transverse deformation of the concrete test piece, two long screw rods, four dial gauges and a plurality of bolts, wherein a plurality of radial through screw holes are respectively formed in the annular walls of the upper lantern ring, the middle lantern ring and the lower lantern ring, and the upper lantern ring, the middle lantern ring and the lower lantern ring are fixed to the concrete test piece to be tested by screwing the bolts into the through screw holes; the upper lantern ring is provided with a pair of axial first through holes positioned at two ends of the same diameter of the upper lantern ring, the annular wall of the upper lantern ring is provided with a first screw hole vertically communicated with the first through holes, the first through holes are used for inserting a dial gauge measuring rod, and the first screw hole is used for fixing a vertically arranged dial gauge through a screwing bolt; the middle lantern ring is provided with a third through hole for inserting the long screw, the lower lantern ring is provided with a second screw hole for inserting and fixing the long screw, the annular wall of the middle lantern ring is also provided with a pair of second through holes positioned at two ends of the same diameter of the middle lantern ring, the middle lantern ring is provided with a third screw hole which is vertically communicated with the second through hole, the second through hole is used for inserting a dial gauge measuring rod, and the third screw hole is used for fixing a dial gauge horizontally arranged by screwing in a bolt.
The long screw rod is T-shaped.
And a pair of third through holes and a pair of second through holes on the middle lantern ring are respectively positioned on two diameters which are perpendicular to each other.
The number of through screw holes on the annular walls of the upper lantern ring, the middle lantern ring and the lower lantern ring is 4, and the through screw holes are uniformly distributed on the annular walls.
The beneficial effects of the utility model are as follows: the concrete sleeve ring is made of steel with high rigidity and strength, so that the influence of device materials on the transverse deformation detection result is reduced; adopt 3 layers of lantern ring devices, reduced the influence of vertical deformation to transverse deformation testing result, this device can be according to the size preparation not unidimensional lantern ring of standard test block and connecting piece, has to dismantle simple, convenient operation testing result characteristics such as accurate.
Drawings
FIG. 1 is a schematic diagram of the upper collar structure of the test device for measuring the Poisson's ratio of concrete by a dial gauge method;
FIG. 2 is a schematic diagram of the middle collar structure of the test device for measuring the Poisson's ratio of concrete by adopting a dial gauge method;
FIG. 3 is a schematic view of the lower collar structure of the test device for measuring the Poisson's ratio of concrete by a dial gauge method;
fig. 4 is a view showing the use state of the test device for measuring the poisson's ratio of concrete by the dial indicator method according to the present utility model.
Fig. 5 is another angle use state diagram of the test device for measuring the poisson's ratio of concrete by adopting the dial gauge method.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements 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 utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-5, the test device for measuring the poisson ratio of the concrete by adopting the dial indicator method comprises an upper lantern ring 6 and a lower lantern ring 8 for measuring the vertical deformation of a concrete test piece, a middle lantern ring 7 for measuring the transverse deformation of the concrete test piece, two long screws 4, four dial indicators 1 and a plurality of bolts 3, wherein a plurality of radial through screw holes are respectively formed in the annular walls of the upper lantern ring 6, the middle lantern ring 7 and the lower lantern ring 8, and the upper lantern ring 6, the middle lantern ring 7 and the lower lantern ring 8 are fixed on the concrete test piece 2 to be tested by screwing the bolts 3 into the through screw holes; the upper lantern ring 6 is provided with a pair of first axial through holes 9 positioned at two ends of the same diameter of the upper lantern ring, the annular wall of the upper lantern ring 6 is provided with a first screw hole 10 vertically communicated with the first through holes 9, the first through holes 9 are used for inserting a measuring rod of the dial indicator 1, and the first screw holes 10 are used for fixing the vertically arranged dial indicator 1 by screwing in bolts; corresponding to the position of the first through hole 9, a third through hole 13 for inserting the long screw 4 is formed in the middle lantern ring 7, a second screw hole 11 for inserting and fixing the long screw 4 is formed in the lower lantern ring 8, a pair of second through holes 5 positioned at two ends of the same diameter of the middle lantern ring are formed in the annular wall of the middle lantern ring 7, a third screw hole 12 vertically communicated with the second through hole 5 is formed in the annular wall of the middle lantern ring 7, the second through hole 5 is used for inserting a measuring rod of the dial indicator 1, and the third screw hole 12 is used for fixing a dial indicator horizontally arranged by screwing in a bolt.
Preferably, the long screw 4 is "T" shaped.
Preferably, the pair of third through holes 13 and the pair of second through holes 5 on the middle collar 7 are respectively located on two diameters perpendicular to each other.
Preferably, the number of through screw holes on the annular walls of the upper lantern ring 6, the middle lantern ring 7 and the lower lantern ring 8 is 4, and the through screw holes are uniformly distributed on the annular walls.
The 3 sets of collars are uniformly fixed on the upper, middle and lower parts of concrete through fixing bolts, so that the middle collar is positioned at the middle part of a concrete test piece, the center points of the upper and lower sets of collars are 75mm away from the center point of the test piece, each set of collars is fixed on the concrete test piece through 4 fixing bolts, the middle collar and the lower collar are connected through a third through hole 13 and a second screw hole 11 on the collars through long screws, 4 dial indicators are respectively fixed on a first through hole 9 and a second through hole 5 (dial indicator jack) of the upper and middle collars through the fixing bolts, the dial indicator bottom of the upper collar is connected with the long screws for measuring vertical deformation, the dial indicator of the middle collar is connected with the detection part of the concrete mark for measuring transverse deformation, and dial indicator reading is adjusted according to the specification requirements. And after the device is connected, placing the test piece on a press machine for testing, reading a dial gauge, calculating the transverse deformation and the vertical deformation of the concrete, and obtaining the Poisson's ratio of the concrete.
In the embodiment, 3 groups of lantern rings are manufactured by steel with higher strength, the thickness of each group of lantern rings is 20mm, and the influence of the vertical deformation and insufficient material strength of the device on the transverse deformation detection result can be effectively solved. The device is suitable for detecting the deformation of concrete by the dial indicator, and has the characteristics of simplicity in disassembly, convenience in operation and accurate detection result.
The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present utility model are still within the scope of the present utility model.
Claims (4)
1. The test device for measuring the Poisson's ratio of the concrete by adopting a dial indicator method is characterized by comprising an upper lantern ring (6) and a lower lantern ring (8) for measuring the vertical deformation of a concrete test piece, a middle lantern ring (7) for measuring the transverse deformation of the concrete test piece, two long screws (4), four dial indicators (1) and a plurality of bolts (3), wherein a plurality of radial through screw holes are respectively formed in the annular walls of the upper lantern ring (6), the middle lantern ring (7) and the lower lantern ring (8), and the upper lantern ring (6), the middle lantern ring (7) and the lower lantern ring (8) are fixed to the concrete test piece (2) to be measured by screwing the bolts (3) into the through screw holes; the upper lantern ring (6) is provided with a pair of first axial through holes (9) positioned at two ends of the same diameter of the upper lantern ring, the annular wall of the upper lantern ring (6) is provided with a first screw hole (10) vertically communicated with the first through holes (9), the first through holes (9) are used for inserting a measuring rod of the dial indicator (1), and the first screw holes (10) are used for fixing the vertically arranged dial indicator (1) through screw bolts; the position corresponding to the first through hole (9) is provided with a third through hole (13) for inserting the long screw (4) on the middle lantern ring (7), a second screw hole (11) for inserting and fixing the long screw (4) is provided on the lower lantern ring (8), a pair of second through holes (5) positioned at two ends of the same diameter of the middle lantern ring are also provided on the annular wall of the middle lantern ring (7), a third screw hole (12) vertically communicated with the second through hole (5) is provided on the annular ring of the middle lantern ring (7), the second through hole (5) is used for inserting a measuring rod of the dial indicator (1), and the third screw hole (12) is used for fixing the dial indicator horizontally arranged through a screwing bolt.
2. The test device for measuring the poisson's ratio of concrete by the dial gauge method according to claim 1, wherein the long screw (4) is "T" -shaped.
3. The test device for measuring the poisson's ratio of concrete by adopting the dial gauge method according to claim 1, wherein a pair of third through holes (13) and a pair of second through holes (5) on the middle sleeve ring (7) are respectively positioned on two diameters which are perpendicular to each other.
4. The test device for measuring the poisson ratio of the concrete by adopting the dial indicator method according to claim 1 is characterized in that the number of through screw holes on the annular walls of the upper lantern ring (6), the middle lantern ring (7) and the lower lantern ring (8) is 4, and the through screw holes are uniformly distributed on the annular walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321796144.3U CN220690661U (en) | 2023-07-10 | 2023-07-10 | Test device for measuring poisson ratio of concrete by adopting dial gauge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321796144.3U CN220690661U (en) | 2023-07-10 | 2023-07-10 | Test device for measuring poisson ratio of concrete by adopting dial gauge method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220690661U true CN220690661U (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321796144.3U Active CN220690661U (en) | 2023-07-10 | 2023-07-10 | Test device for measuring poisson ratio of concrete by adopting dial gauge method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220690661U (en) |
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2023
- 2023-07-10 CN CN202321796144.3U patent/CN220690661U/en active Active
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