CN108918251B - Height-adjustable support applied to continuous beam test - Google Patents
Height-adjustable support applied to continuous beam test Download PDFInfo
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- CN108918251B CN108918251B CN201810635438.5A CN201810635438A CN108918251B CN 108918251 B CN108918251 B CN 108918251B CN 201810635438 A CN201810635438 A CN 201810635438A CN 108918251 B CN108918251 B CN 108918251B
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- 238000000034 method Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void 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
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Abstract
The invention provides a height-adjustable support applied to a continuous beam test, which comprises a support upper end part, a screw rod part and a nut part, wherein the nut part is in threaded connection with the screw rod part, the screw rod part is connected with the support upper end part, the support upper end part comprises a fixed hinged support and a base plate, the fixed hinged support is used for placing a test beam, the fixed hinged support is arranged on the base plate, and the base plate is connected with the screw rod part. The invention has the beneficial effects that: the elevation of the support can be conveniently and accurately adjusted before and during the test, so that the elevation of each support of the continuous beam is always kept consistent during the whole test process, and the stress state of each support is ensured to be the same as the theoretical calculation.
Description
Technical Field
The invention relates to a continuous beam test, in particular to a height-adjustable support applied to the continuous beam test.
Background
The continuous beam test is a common test in the field of civil engineering, and the adjustment of the height of the support before the test ensures that the elevations of the support are consistent, which is an important step for ensuring the accuracy of the test result of the continuous beam. Compared with a simply supported beam test, the influence of the small difference of the elevations of the supports is not obvious, but for the continuous beam test, if the elevations of the supports are not equal, the continuous beam is partially suspended and becomes a simply supported beam, so that the initial stress state is completely different from the theoretical calculation, and therefore, the elevations of the supports are required to be ensured to be completely consistent before the test. In addition, the phenomenon of support seat void can also appear in the test process in the continuous beam, leads to the stress state of each support seat in the test process completely different with during theoretical calculation, consequently, also need in time to adjust the support seat height in the test process. At present, methods for adjusting the height of a support mainly comprise a steel plate cushioning method and a jack height adjusting method, wherein the steel plate cushioning method is usually difficult to find a steel plate with proper thickness, so that the adjustment precision is poor, and the steel plate cushioning method also has no operability in the test process; when the jack height-adjusting method is adopted, the strength of the joint of the jack and the support and the overall stability of the jack and the support are difficult to guarantee.
In view of this, how to provide a support capable of freely adjusting height, which can conveniently and accurately adjust the elevation of the support before and during the test, so that the elevation of each support of the continuous beam in the whole test process is always kept consistent, thereby ensuring that the stress state of each support is the same as the theoretical calculation, and is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a height-adjustable support applied to a continuous beam test.
The invention provides a height-adjustable support applied to a continuous beam test, which comprises a support upper end part, a screw rod part and a nut part, wherein the nut part is in threaded connection with the screw rod part, the screw rod part is connected with the support upper end part, the support upper end part comprises a fixed hinged support and a base plate, the fixed hinged support is used for placing a test beam, the fixed hinged support is arranged on the base plate, and the base plate is connected with the screw rod part.
As a further improvement of the invention, the fixed hinge support comprises a rotatable base plate for placing the test beam, a rotating shaft seat and a top plate, wherein the top plate and the base plate are flat plates, the top plate is attached to the base plate, the rotating shaft seat is arranged on the top plate, and the rotating shaft seat is rotatably connected with the rotatable base plate through the rotating shaft.
As a further improvement of the invention, the top plate and the base plate are both made of steel plates, and the top plate and the base plate are welded in a seamless mode.
As a further improvement of the present invention, the screw portion includes a screw, a screw top plate, a pressure sensor and a first smooth round rod, the bottom of the screw is in threaded connection with the nut portion, the top of the screw is connected with the screw top plate, the screw top plate is connected with the first smooth round rod, the pressure sensor is disposed on the screw top plate, the substrate is provided with a first smooth round hole, the first smooth round rod is disposed inside the first smooth round hole, the pressure sensor is disposed between the substrate and the screw top plate, and the pressure sensor is respectively tightly attached to the substrate and the screw top plate.
As a further improvement of the invention, both sides of the screw top plate are provided with detachably mounted rotating handles.
As a further improvement of the present invention, the pressure sensor is sleeved on the first smooth round bar, the height of the first smooth round bar is greater than the height of the pressure sensor, and the height of the first smooth round bar is slightly less than the sum of the height of the pressure sensor and the thickness of the substrate.
As a further improvement of the invention, the screw top plate is a steel plate, and the screw top plate is welded with the first smooth round rod in a seamless mode.
As a further improvement of the invention, the nut portion comprises a bottom plate, at least four second smooth round rods with threads at the bottom and a nut, the nut is arranged at the center of the bottom plate, the number of the second smooth round rods with threads at the bottom is at least four, the second smooth round rods with threads at the bottom are respectively arranged at the periphery of the bottom plate, the nut is in threaded connection with the bottom of the screw rod, threaded round holes corresponding to the second smooth round rods with threads at the bottom are arranged at the periphery of the bottom plate one by one, the second smooth round rods with threads at the bottom are fixedly connected with the threaded round holes, second smooth round holes corresponding to the second smooth round rods with threads at the bottom are arranged at the periphery of a top plate at the upper end of the support seat one by one, and the second smooth round rods with threads at the bottom penetrate through the second smooth round holes.
As a further improvement of the invention, the top of the second smooth round bar with the threaded bottom is always higher than the upper surface of the top plate at the upper end part of the support during the height adjustment.
As a further improvement of the invention, the bottom plate is a steel plate, threaded round holes arranged on the periphery of the bottom plate are fixedly connected with the second smooth round rod with threads at the bottom, and the bottom plate is welded with the nut in a seamless mode.
The invention has the beneficial effects that: by the scheme, the elevations of the supports can be conveniently and accurately adjusted before and during the test, so that the elevations of the supports of the continuous beam are always kept consistent during the whole test process, and the stress state of each support is ensured to be the same as the theoretical calculation.
Drawings
Fig. 1 is a schematic perspective view of a height-adjustable support applied to a continuous beam test according to the present invention.
Fig. 2 is a side view of a height adjustable mount of the present invention applied to a continuous beam test.
Fig. 3 is a schematic view of the upper end portion of the support of a height adjustable support applied to a continuous beam test of the present invention.
Fig. 4 is a partial schematic view of a screw of a height adjustable support applied to a continuous beam test of the invention.
Fig. 5 is a schematic view of a nut portion of a height adjustable pedestal of the present invention applied to a continuous beam test.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 5, a height-adjustable support applied to a continuous beam test comprises a support upper end portion 1, a screw portion 2 and a nut portion 3, wherein the nut portion 3 is in threaded connection with the screw portion 2, the screw portion 2 is connected with the support upper end portion 1, the height of the support upper end portion 1 is adjusted by rotating the screw portion 2, the support upper end portion 1 comprises a fixed hinge support for placing a test beam and a base plate 11, the fixed hinge support is arranged on the base plate 11, and the base plate 11 is connected with the screw portion 2.
As shown in fig. 1 to 5, the fixed hinge support includes a rotatable backing plate 15, a rotating shaft 14, a rotating shaft seat 13 and a top plate 12 for placing the test beam, the rotating shaft seat 13 is provided with two and symmetrically distributed for erecting the rotating shaft 14, the top plate 12 and the base plate 11 are both flat plates, the top plate 12 is attached to the base plate 11, the rotating shaft seat 13 is arranged on the top plate 12, and the rotating shaft seat 13 is rotatably connected with the rotatable backing plate 15 through the rotating shaft 14.
As shown in fig. 1 to 5, the top plate 12 and the base plate 11 are both made of steel plates, and the top plate 12 and the base plate 11 are welded seamlessly and ensure that the centers of mass thereof are completely overlapped.
As shown in fig. 1 to 5, the screw portion 2 includes a screw 21, a screw top plate 22, a pressure sensor 23 and a first smooth round rod 24, the bottom of the screw 21 is in threaded connection with the nut portion 3, the top of the screw 21 is connected with the screw top plate 22, the screw top plate 22 is connected with the first smooth round rod 24, the pressure sensor 23 is disposed on the screw top plate 22, a first smooth round hole 111 penetrating through is disposed at the center of the substrate 11, the first smooth round rod 24 is disposed in the first smooth round hole 111, the pressure sensor 23 is disposed between the substrate 11 and the screw top plate 22, and the pressure sensor 23 is respectively tightly attached to the substrate 11 and the screw top plate 22.
As shown in fig. 1 to 5, the first smooth circular hole 111 is matched with the diameter of the first smooth circular rod 24.
As shown in fig. 1 to 5, rotation handles 25 detachably mounted are provided on both sides of the screw top plate 22 for rotating the screw top plate 22.
As shown in fig. 1 to 5, the pressure sensor 23 is sleeved on the first smooth round rod 24, the height of the first smooth round rod 24 is greater than that of the pressure sensor 23, and the height of the first smooth round rod 24 is slightly smaller than the sum of the height of the pressure sensor 23 and the thickness of the base plate 11, so that the upper end part 1 of the support and the screw part 2 are tightly connected, and the load of the upper end part 1 of the support can be effectively transmitted to the lower screw 21 through the pressure sensor 23.
As shown in fig. 1 to 5, the screw top plate 22 is a steel plate, and the screw top plate 22 is welded to the first smooth round rod 24 in a seamless manner, and ensures that the center of mass of the screw top plate is completely overlapped.
As shown in fig. 1 to 5, the nut portion 3 includes a bottom plate 31, at least four second smooth round rods 33 with threads at the bottom, and a nut 32, the nut 32 is disposed at the center of the bottom plate 31, the number of the second smooth round rods 33 with threads at the bottom is at least four, and is preferably disposed around the bottom plate 31, four second smooth round rods 33 with threads at the bottom are preferably disposed, the nut 32 is in threaded connection with the bottom of the screw 21, threaded round holes 311, preferably four threaded round holes 311, are disposed around the bottom plate 31, the second smooth round rods 33 with threads at the bottom are in one-to-one correspondence with the second smooth round rods 33 with threads at the bottom, the second smooth round holes 121, preferably four second smooth round holes 121, are disposed around the top plate 12 of the support upper portion 1, the second smooth round holes 121, which are one-to-one correspondence with the second smooth round rods 33 with threads at the bottom are disposed around the support upper portion 1, the second smooth round bar 33 with a threaded bottom passes through the second smooth round hole 121.
As shown in fig. 1 to 5, the nut 32 is rotated relatively to the screw 21 to generate a longitudinal displacement, thereby achieving a function of adjusting the height of the support, and the thread of the nut 32 is engaged with the thread of the screw 21.
As shown in fig. 1 to 5, during the height adjustment, the top of the second smooth round bar 33 with a threaded bottom is always higher than the upper surface of the top plate 12 of the upper end portion 1 of the holder.
As shown in fig. 1 to 5, the bottom plate 31 is a steel plate, the threaded circular holes 311 formed around the bottom plate 31 are fixedly connected with the second smooth circular rod 33 with threads at the bottom, and the bottom plate 31 and the nut 32 are welded seamlessly and the center of mass thereof is ensured to be completely overlapped.
As shown in fig. 1 to 5, in order to prevent the screw 21 of the screw portion 2 from rotating together with the upper end portion 1 of the support, the screw portion 2 and the upper end portion 1 of the support are separately installed by fixing the first smooth circular rod 24 through the first smooth circular hole 111 of the base plate 11. In order to avoid the situation that after the height of the support is adjusted, the upper end part 1 of the support rotates due to external disturbance, so that the central line of the support deviates, a method of connecting and fixing four second smooth round rods 33 with threads at the bottom on a bottom plate 31 and penetrating through a top plate 12 of the upper end part 1 of the support is adopted in the design of the support, effective constraint is provided for the upper end part 1 of the support, and therefore the rotation of the upper end part 1 of the support is limited. In order to avoid the mutual interference between the rotating handles 25 arranged at the two sides of the screw top plate 22 and the second smooth round rods 33 with threads at the bottom on the periphery in the adjustment process of the height of the support, the rotating handles 25 are designed to be detachable, and the rotating handles 25 are detached after the height of the support is adjusted. In addition, the screw rod part 2 is provided with a pressure sensor 23, so that the load borne by the whole support in the test process can be monitored in real time, and the relation between the counter forces of all supports is ensured to accord with theoretical calculation by adjusting the height of the support.
The invention provides a height-adjustable support applied to a continuous beam test, which comprises the following operation processes:
(1) two turning handles 25 are mounted on the screw top plate 22 and screwed down.
(2) The screw 21 is placed in the nut 32 and the two parts are engaged by rotating the handle 25 and adjusted to the proper position so that the screw part 2 is tightly engaged with the nut part 3.
(3) A pressure sensor 23 is placed on the upper surface of the screw top plate 22 through a first smooth round bar 24.
(4) The base plate 11 is fixed on the first smooth round rod 24 through the first smooth round hole 111 with a through center position, so that the base plate 11 is tightly attached to the pressure sensor 23, thereby ensuring that the support upper end part 1 is tightly combined with the screw part 2.
(5) The height of the supports is slowly adjusted by rotating the turning handle 25 until the elevations of the supports are completely consistent.
(6) Slowly removing the rotating handle 25, and adjusting the position of the upper end part 1 of the support so that the top plate 12 of the upper end part 1 of the support is completely overlapped with the bottom plate 31 of the nut part 3; then, the four second smooth round rods 33 with threads at the bottom penetrate through the top plate 12 of the support upper end part 1, and are respectively rotated to be connected and fixed with threaded round holes 311 arranged around the bottom plate 31 of the nut part 3.
(7) The loading test can be started by placing the test beam on the turnable mat 15 of the upper part 1 of the support.
The height-adjustable support applied to the continuous beam test is characterized in that all steel plates, the rotatable base plate 15, the rotating shaft 14, the rotating shaft seat 13, the smooth round rod, the screw 21 and the nut 32 are made of high-strength steel, the dimensions of the rotatable base plate 15, the rotating shaft 14 and the rotating shaft seat 13 are determined according to the dimension of the test beam, and the dimensions of the steel plates, the screw 21 and the nut 32 are designed according to the maximum bearing capacity of the support in the test process, so that the strength and the integral stability of the support in the whole test process are ensured, and the dimensions of the top plate 12 of the upper end part 1 of the support in the first part and the bottom plate 31 of the nut part 3 in the third part are kept consistent.
The invention provides a height-adjustable support applied to a continuous beam test, which mainly realizes the function of adjusting the height of the support through the rotation of a screw relative to a nut.
The height-adjustable support applied to the continuous beam test provided by the invention is applied to the continuous beam test, can effectively solve the problem that the stress state of the support is different from theoretical calculation due to different initial elevations of each support or the condition that the support is empty in the test process, and the like, can be widely applied to various beam tests, and effectively improves the test accuracy. The support has the advantages of simple design, complete functions, convenient manufacture, processing and installation, low cost, wide application range and easy popularization and use.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. The utility model provides a be applied to experimental height-adjustable support of continuous beam which characterized in that: the device comprises a support upper end part, a screw rod part and a nut part, wherein the nut part is in threaded connection with the screw rod part, the screw rod part is connected with the support upper end part, the support upper end part comprises a fixed hinge support and a base plate, the fixed hinge support is used for placing a test beam, the base plate is arranged on the base plate, the base plate is connected with the screw rod part, the fixed hinge support comprises a rotatable base plate, a rotating shaft seat and a top plate, the rotatable base plate is used for placing the test beam, the top plate and the base plate are flat plates, the top plate is attached to and arranged on the base plate, the rotating shaft seat is arranged on the top plate, the rotating shaft seat is in rotational connection with the rotatable base plate through the rotating shaft, the screw rod part comprises a screw rod, a screw rod top plate, a pressure sensor and a first smooth, the top of screw rod with the screw rod roof is connected, the screw rod roof with first smooth round bar is connected, pressure sensor sets up on the screw rod roof, be equipped with first smooth round hole on the base plate, first smooth round bar sets up within the first smooth round hole, pressure sensor sets up between base plate, the screw rod roof, pressure sensor respectively with base plate, the inseparable laminating of screw rod roof.
2. The height-adjustable support applied to the continuous beam test is as claimed in claim 1, wherein: the top plate and the base plate are both steel plates and are welded in a seamless mode.
3. The height-adjustable support applied to the continuous beam test is as claimed in claim 1, wherein: and the two sides of the screw top plate are provided with detachably mounted rotating handles.
4. The height-adjustable support applied to the continuous beam test is as claimed in claim 1, wherein: the pressure sensor is sleeved on the first smooth round rod, the height of the first smooth round rod is larger than that of the pressure sensor, and the height of the first smooth round rod is slightly smaller than the sum of the height of the pressure sensor and the thickness of the substrate.
5. The height-adjustable support applied to the continuous beam test is as claimed in claim 1, wherein: the screw top plate is a steel plate, and the screw top plate is welded with the first smooth round rod in a seamless mode.
6. The height-adjustable support applied to the continuous beam test is as claimed in claim 1, wherein: the nut part comprises a bottom plate, a second smooth round rod with threads at the bottom and a nut, the nut is arranged at the center of the bottom plate, the number of the second smooth round rods with the threads at the bottom is at least four, the second smooth round rods with the threads at the bottom are respectively arranged on the periphery of the bottom plate, the nut is in threaded connection with the bottom of the screw rod, threaded round holes in one-to-one correspondence with the second smooth round rods with the threads at the bottom are formed in the periphery of the bottom plate, the second smooth round rods with the threads at the bottom are fixedly connected with the threaded round holes, second smooth round holes in one-to-one correspondence with the second smooth round rods with the threads at the bottom are formed in the periphery of a top plate at the upper end of the support, and the second smooth round rods with the threads at the bottom penetrate through.
7. The height-adjustable support applied to the continuous beam test is characterized in that: and in the height adjustment process, the top of the second smooth round rod with the threaded bottom is always higher than the upper surface of the top plate at the upper end part of the support.
8. The height-adjustable support applied to the continuous beam test is characterized in that: the bottom plate is a steel plate, threaded round holes arranged on the periphery of the bottom plate are fixedly connected with a second smooth round rod with threads at the bottom, and the bottom plate is welded with the nut in a seamless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635438.5A CN108918251B (en) | 2018-06-20 | 2018-06-20 | Height-adjustable support applied to continuous beam test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635438.5A CN108918251B (en) | 2018-06-20 | 2018-06-20 | Height-adjustable support applied to continuous beam test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108918251A CN108918251A (en) | 2018-11-30 |
| CN108918251B true CN108918251B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810635438.5A Expired - Fee Related CN108918251B (en) | 2018-06-20 | 2018-06-20 | Height-adjustable support applied to continuous beam test |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882685A (en) * | 2019-03-31 | 2019-06-14 | 武汉轻工大学 | Structural test levelling screw |
| CN110095356B (en) * | 2019-04-25 | 2022-06-03 | 西安理工大学 | Dynamic counter-force measuring device under impact load effect |
| CN110561303A (en) * | 2019-09-27 | 2019-12-13 | 江铃汽车股份有限公司 | Supporting structure for automobile part machining |
| CN114993636B (en) * | 2022-04-20 | 2023-04-11 | 海南大学 | Adjustable fixed hinge support for mechanical property test of simply supported beam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200952983Y (en) * | 2006-09-16 | 2007-09-26 | 合肥工业大学 | Adjustable support |
| CN205012644U (en) * | 2015-08-25 | 2016-02-03 | 朱玉珍 | Building masterplate strutting arrangement with adjustable height |
| CN106840845A (en) * | 2016-12-21 | 2017-06-13 | 北京建筑大学 | A kind of omnipotent bias loading support meanss and its application method |
| CN107059605A (en) * | 2017-06-09 | 2017-08-18 | 上海市城市建设设计研究总院（集团）有限公司 | The bridge pad of bridge pad governor motion, adjustable height and adjustable inclination |
-
2018
- 2018-06-20 CN CN201810635438.5A patent/CN108918251B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200952983Y (en) * | 2006-09-16 | 2007-09-26 | 合肥工业大学 | Adjustable support |
| CN205012644U (en) * | 2015-08-25 | 2016-02-03 | 朱玉珍 | Building masterplate strutting arrangement with adjustable height |
| CN106840845A (en) * | 2016-12-21 | 2017-06-13 | 北京建筑大学 | A kind of omnipotent bias loading support meanss and its application method |
| CN107059605A (en) * | 2017-06-09 | 2017-08-18 | 上海市城市建设设计研究总院（集团）有限公司 | The bridge pad of bridge pad governor motion, adjustable height and adjustable inclination |
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| CN108918251A (en) | 2018-11-30 |
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Granted publication date: 20210413 |