CN113358464A - Force measuring device under reinforced concrete slab column structure column and calibration kit - Google Patents
Force measuring device under reinforced concrete slab column structure column and calibration kit Download PDFInfo
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- CN113358464A CN113358464A CN202110561902.2A CN202110561902A CN113358464A CN 113358464 A CN113358464 A CN 113358464A CN 202110561902 A CN202110561902 A CN 202110561902A CN 113358464 A CN113358464 A CN 113358464A
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- column
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- reinforced concrete
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- measuring device
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 238000012546 transfer Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 239000011888 foil Substances 0.000 abstract 1
- 238000011160 research Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a reinforced concrete slab-column structure under-column force measuring device and a calibration kit. Brittle punching shear damage easily occurs to the node under the effect of local accidental disasters, and once a small-range initial damage occurs in a structural system, the ductility and the bearing capacity of a substituted force transmission path of a residual structure are low, so that large-range continuous collapse is easily triggered. Continuous collapse is a nonlinear power process of a structural system, load borne by each column after impact shear damage is important data for analyzing internal force redistribution, and various load effects such as pressure and bending can be realized according to different positions of each column. The method is characterized in that a continuous collapse resistance test of the reinforced concrete plate column structure is designed and implemented, and a reinforced design is made to avoid continuous collapse damage by analyzing the internal force redistribution condition of the whole structure. This patent uses self-control part, arranges order and connected mode through the specific of foil gage, but counter-force under the accurate measurement post provides reliable support for the experimental research of the anti successive collapse of reinforced concrete slab-column structure.
Description
Technical Field
The invention relates to a reinforced concrete slab-column structure continuous collapse performance testing device, and belongs to the field of building structure disaster prevention and reduction.
Background
Brittle punching shear damage easily occurs to the node under the effect of local accidental disasters, and once a small-range initial damage occurs in a structural system, the ductility and the bearing capacity of a substituted force transmission path of a residual structure are low, so that large-range continuous collapse is easily triggered. Continuous collapse is a nonlinear power process of a structural system, load borne by each column after impact shear damage is important data for analyzing internal force redistribution, and various load effects such as pressure and bending can be realized according to different positions of each column. The concrete plate column structure collapse resistance test is designed and implemented, and the reinforcing design is made to avoid the occurrence of collapse damage by analyzing the internal force redistribution condition of the whole structure.
At present, an ordinary force sensor cannot measure eccentric load, a self-made measuring device is easily influenced by other loads, and the precision is difficult to meet the requirement. Therefore, there is a need for a force measuring device under a column that is reasonable in cost and high in accuracy.
Disclosure of Invention
The continuous collapse test of the reinforced concrete plate column structure usually needs to measure the counterforce under each column, and the side columns and the corner columns are under the action of eccentric load except that the middle column is under the axial pressure. The invention can measure the eccentric load of the upper column by arranging 4 measuring sleeves under the column. In addition, a calibration kit is designed in a matching way, so that the measurement precision of the measurement device can be effectively improved.
Further, to ensure a stable load transfer to the 4 measuring sleeves. And 4 load measuring sleeves are placed between the fixed steel support (3) and the column bottom fixed steel plate (4) and aligned with the 4 reserved threaded holes. With load transfer bolt (1) through the screw hole twist load measurement sleeve (2), both pass through the screw thread and connect, so with fixed steel support (3) and top device (4, 5) connection, can also guarantee to draw the side bolt and will draw load transfer to measuring the sleeve, guarantee to apply load and stably transfer to 4 measuring the sleeve. Furthermore, when the column body is under tension or compression, the acting force is not along the central axis direction of the column body, so that the column body is also under the action of transverse force and bending moment. The influence of transverse force and bending moment can be reduced to the maximum extent.
Furthermore, during the measurement, the sleeve (2) is in an elastic stage, which is an important guarantee of high-precision measurement, the sleeve is tensioned/pressed to deform, the measured strain is fed back to the acquisition instrument by the resistance type strain gauge, and the load is further calculated. After the 40Cr steel is quenched and tempered, the steel has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity, and the 40Cr steel is selected as a sleeve raw material.
Furthermore, in order to avoid errors in the assembling process, a plurality of groups of pressure are applied to the eccentric loading steel beam (6) before the test, the data measured by the load measuring sleeve (2) and the force sensor (7) are compared, and the calibration and debugging are carried out on the force measuring device and the acquisition software.
Advantages and effects of the invention
1. The eccentric load can be measured. The traditional force sensor can only measure axial load, and the problem is perfectly solved by 4 self-made force measuring sleeves under the column.
2. The assembly is simple, and the cost is reasonable. The invention can be directly connected with a reinforced concrete column, can be used as a part of a reinforced concrete structure, can be arranged under any column, has low manufacturing cost of all manufacturing materials, and greatly reduces the cost compared with a professional force sensor.
3. Has wide application range. In recent years, the reinforced concrete plate column structure tests are greatly increased, and the reinforced concrete plate column structure test method has wide use scenes under the advantages.
Drawings
FIG. 1 is a schematic view of a load transfer bolt
FIG. 2 is a schematic view of a load measuring sleeve
FIG. 3 shows the connection and arrangement of strain gauges
FIG. 4 is a schematic view of a force measuring device
FIG. 5 shows a force measuring device and a calibration kit
FIG. 6 is a schematic diagram of a continuous collapse test of a reinforced concrete slab-column structure
Detailed Description
The apparatus of the present invention is shown in FIG. 5, and the specific implementation method will be described below.
1) And 4 resistance strain gauges are adhered along the middle line of the sleeve in the horizontal-vertical-horizontal-vertical directions (figure 3). The pasting quality of the strain gauge directly influences the measurement result, and the pasting level and the verticality must be strictly ensured.
2) And connecting the strain gauges with the sleeves pasted with the strain gauges according to the connection mode shown in the figure 3, and reserving 4 signal wires for each sleeve to be connected with an acquisition instrument.
3) And the fixed steel support is fixedly connected with the laboratory ground through an anchor bolt, so that the stability of the device in the test process is ensured.
5) And a load transmission bolt penetrates through the load measuring sleeve to connect the fixed steel support and the column bottom fixed steel plate into a whole.
6) After the steel column is connected with the eccentric loading steel beam through bolts, the reaction frame is reasonably arranged above the steel column according to the size, and the actuator is connected to the reaction frame.
7) And applying a plurality of groups of loads, comparing the data measured by the force sensor with the sum of the data measured by the 4 sleeves, adjusting acquisition software to reach the required precision, and finishing calibration.
8) After the calibration is finished, the eccentric loading steel beam is removed, the device can be connected with any reinforced concrete column for load measurement, and only the connecting steel plate is embedded at the column bottom in the concrete column manufacturing stage (figure 6).
Claims (7)
1. The utility model provides a measuring force device and demarcation external member under reinforced concrete column which characterized in that, including: the device comprises a load transfer bolt (1), a load measuring sleeve (2), a fixed steel support (3), a column bottom fixed steel plate (4), a connecting steel column (5), an eccentric loading steel beam (6), a force sensor (7), an actuator (8) and a reaction frame (9);
wherein the fixed steel support (3) is connected with the ground, and the middle part above the fixed steel support (3) is uniformly provided with a connecting load measuring sleeve (2) and a load transfer bolt (1); a column bottom fixing steel plate (4), a connecting steel column (5) and an eccentric loading steel beam (6), a force sensor (7) and an actuator (8) are sequentially arranged above the fixed steel support (3) in a supporting mode; a reaction frame (9) of a fixed facility of the whole set of test device is arranged above the actuator;
the force measuring device comprises the following components: 4 strain gauges are adhered to the surface of the load measuring sleeve (2) and connected in series to form a Wheatstone bridge, and a signal line is reserved at each connection point and connected with acquisition equipment; placing 4 load measuring sleeves between the fixed steel support (3) and the column bottom fixed steel plate (4), and aligning with the 4 reserved threaded holes; with load transfer bolt (1) through screw hole twist load measurement sleeve (2), both pass through the screw thread and connect, so be connected fixed steel support (3) and the fixed steel sheet (4) in column bottom, load transfer bolt (1) will be pulled load transfer to measuring the sleeve.
2. A force-measuring device and calibration kit for a reinforced concrete column according to claim 1, characterized in that the vehicle screw thread on the inside of the load-measuring sleeve (2) is connected with the load-transmitting bolt (1) to form a combined device, ensuring that the pulling force applied to the bolt and the pressure applied to the sleeve are transmitted simultaneously.
3. A force-measuring device and calibration kit under a reinforced concrete column as in claim 1, characterized in that the central line position of the surface of the load measuring sleeve (2) is pasted with 4 strain gauges at equal intervals according to the horizontal-vertical-horizontal-vertical direction, and a signal line is reserved at each connection point for connecting with the acquisition instrument according to the series connection circuit.
4. A reinforced concrete column lower force-measuring device and calibration kit as claimed in claim 1, characterized in that said fixed steel support (3) and column bottom fixed steel plate (4) are provided with 4 threaded holes and connected by the combination device as claimed in claim 2.
5. A reinforced concrete column lower force-measuring device and calibration kit as claimed in claim 1, characterized in that said connecting steel column (5) is connected to the column bottom fixing steel plate (4) by welding and 2 stiffening ribs are welded on four sides respectively; and 4 through holes are reserved in the steel plate on the upper part of the steel column and are connected with the eccentric loading steel beam or the test piece through bolts.
6. A reinforced concrete column lower force-measuring device and calibration kit as claimed in claim 1, wherein the base of the eccentric loading steel beam (6) is provided with 4 through holes at its corners, and is connected with the steel column by bolts; the steel beam is provided with stiffening ribs along the length direction.
7. A reinforced concrete column lower force-measuring device and calibration kit as claimed in claim 1, characterized in that the force-measuring device is connected to the eccentrically loaded steel beam (6) by means of bolts, applying a plurality of sets of pressures, comparing the data measured by the load measuring sleeve (2) and the force sensor (7), calibrating and debugging the force-measuring device and the acquisition software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561902.2A CN113358464A (en) | 2021-05-23 | 2021-05-23 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561902.2A CN113358464A (en) | 2021-05-23 | 2021-05-23 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113358464A true CN113358464A (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110561902.2A Pending CN113358464A (en) | 2021-05-23 | 2021-05-23 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113358464A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201314882Y (en) * | 2008-12-16 | 2009-09-23 | 江苏省第一建筑安装有限公司 | Pressure-bearing testing device for eccentric compression reinforced concrete columns |
| CN105067166A (en) * | 2015-07-28 | 2015-11-18 | 北京工业大学 | Sleeve type force transducer for support structures |
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN106383039A (en) * | 2016-09-16 | 2017-02-08 | 北京工业大学 | Device and method for testing progressive collapse performances of concrete plate-column structure |
| CN109115378A (en) * | 2018-07-27 | 2019-01-01 | 江铃汽车股份有限公司 | A kind of flexural pivot force test device and its test method |
| CN109163979A (en) * | 2018-09-11 | 2019-01-08 | 江苏开放大学（江苏城市职业学院） | Detachable large eccentric pressuring column test device and method is adjusted in one kind |
| CN109268375A (en) * | 2018-10-19 | 2019-01-25 | 上海大学 | A kind of dynamometry bolt |
| CN110441145A (en) * | 2019-08-27 | 2019-11-12 | 青岛理工大学 | Tunnel lining concrete durability test method |
| CN209992191U (en) * | 2019-06-26 | 2020-01-24 | 中国第一汽车股份有限公司 | Load testing device for piston rod of automobile shock absorber |
-
2021
- 2021-05-23 CN CN202110561902.2A patent/CN113358464A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201314882Y (en) * | 2008-12-16 | 2009-09-23 | 江苏省第一建筑安装有限公司 | Pressure-bearing testing device for eccentric compression reinforced concrete columns |
| CN105067166A (en) * | 2015-07-28 | 2015-11-18 | 北京工业大学 | Sleeve type force transducer for support structures |
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN106383039A (en) * | 2016-09-16 | 2017-02-08 | 北京工业大学 | Device and method for testing progressive collapse performances of concrete plate-column structure |
| CN109115378A (en) * | 2018-07-27 | 2019-01-01 | 江铃汽车股份有限公司 | A kind of flexural pivot force test device and its test method |
| CN109163979A (en) * | 2018-09-11 | 2019-01-08 | 江苏开放大学（江苏城市职业学院） | Detachable large eccentric pressuring column test device and method is adjusted in one kind |
| CN109268375A (en) * | 2018-10-19 | 2019-01-25 | 上海大学 | A kind of dynamometry bolt |
| CN209992191U (en) * | 2019-06-26 | 2020-01-24 | 中国第一汽车股份有限公司 | Load testing device for piston rod of automobile shock absorber |
| CN110441145A (en) * | 2019-08-27 | 2019-11-12 | 青岛理工大学 | Tunnel lining concrete durability test method |
Non-Patent Citations (1)
| Title |
|---|
| 唐贤强 * |
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Application publication date: 20210907 |