KR20170079025A - model prestress structures test apparatus - Google Patents
model prestress structures test apparatus Download PDFInfo
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- KR20170079025A KR20170079025A KR1020150189131A KR20150189131A KR20170079025A KR 20170079025 A KR20170079025 A KR 20170079025A KR 1020150189131 A KR1020150189131 A KR 1020150189131A KR 20150189131 A KR20150189131 A KR 20150189131A KR 20170079025 A KR20170079025 A KR 20170079025A
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- model
- tensile force
- tensile
- prestressing
- model pre
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
-
- 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
-
- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- 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)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
More particularly, the present invention relates to a device for testing a model prestressing structure for evaluating the lateral-conduction buckling stability of a structure through a reduced model pre-stress structure instead of a real structure in construction and education sites .
In addition, a tensile force adjusting unit for adjusting the tensile force applied to the tensile members and the tensile members coupled to the both side supports through the model prestressed structure sandwiched between the supporting members disposed on both sides of the frame to mount the modeled prestressing structure, And a tensile force measuring unit for measuring a change in a tensile force applied to the tensile member while the deformed type pre-stress structure is deformed by a load applied through the pressing unit and a pressing unit for applying a load by pressing the model pre-stressed structure.
Description
More particularly, the present invention relates to a device for testing a model prestressing structure for evaluating the lateral-conduction buckling stability of a structure through a reduced model pre-stress structure instead of a real structure in construction and education sites .
In general, architectural and civil engineering structures are constantly being inspected from the design stage to the stability stage, and many theoretical training is conducted on how to evaluate stability in the educational field.
However, in the transverse and buckling buckling tests on the actual structures at the construction site or the education site, not only the period and cost of producing the test specimens were excessive, but also the difficulty was encountered in mounting the test specimens and implementing the boundary conditions.
In particular, unexpected variations are more likely to occur than nonlinearities of materials, geometric imperfection of structures, and changes in prestressing forces, and lateral-transverse buckling Stability is a complicated boundary condition for the transverse direction, and buckling test equipment is limited to column compression buckling.
Accordingly, a method for preventing the lateral buckling and measuring the stability of the test object, such as the Korean Patent No. 10-2015-0138455, "Lateral buckling prevention system of the test body" has been developed. However, The experimental results are inaccurate and it is difficult to implement the boundary condition for the transverse - conducting buckling test.
Accordingly, it is possible to implement a boundary condition for the lateral-conduction buckling test when the stability is tested using a reduced-size model at the design stage or the education site, and a device and a method for minimizing the error due to the frictional force during the test process Is required.
Particularly, since the actual prestressing structures are installed together with the prestressing material, a device and a method for applying the prestressing material and the tensioning force are required to form the same condition when the prestressing structure is tested. However, in the conventional testing equipment, There is a problem that only the stability test for the prestressed structure is possible.
Accordingly, there is a need for an equipment capable of measuring the tensile force applied to the tensile material of the structure by creating an experimental environment corresponding to various environments in which the actual structure is installed.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a test apparatus for a model pre-stress structure for evaluating the lateral-conductive buckling stability easily and simply instead of a real structure.
Another object of the present invention is to provide a model pre-stress structure test apparatus for installing a tensile material in the same manner as a seal structure in a model pre-stressed structure and measuring a tensile force applied to the tensile material.
It is still another object of the present invention to provide a model pre-stress structure testing apparatus for evaluating stability in an environment having the same shape and slope of a model pre-stress structure in a form corresponding to various environments in which a real structure and a real structure are installed.
In order to achieve the above object, the apparatus for testing a model prestressing structure according to the present invention comprises a supporting part disposed on both sides of a frame for mounting a model prestressing structure, a tension member passing through the model prestressing structure, A tensile force adjusting part for adjusting a tensile force applied to the tensile material, a pressing part for applying a load by pressing the model prestressing structure, and a tensile force applied to the tensile material while the model prestressing structure is deformed by a load applied through the pressing part And a tension measuring unit for measuring the tension.
The supporting part supports the model prestressing structure through a pivoting member which freely rotates and freely moves so as to prevent a resistance due to a frictional force from occurring between the model prestressing structure and the lateral boundary condition contact surface.
The deformation measuring unit may further include a deformation measuring unit disposed below the model prestressing structure which is pressed by the pressing unit to measure deformation of the modeling prestressing structure deformed by the pressing unit.
In addition, the support portion is configured to be adjustable in spacing according to the length of the model pre-stress structure.
In addition, the support portions are configured to be adjustable in height differently according to the inclination of the model pre-stress structure.
As described above, according to the apparatus for testing a model pre-stress structure according to the present invention, the lateral-conductive buckling stability can be easily and simply evaluated instead of the actual structure.
In addition, according to the apparatus for testing a model prestressing structure according to the present invention, it is possible to measure a tensile force applied to a tensile material by installing a tensile material in the same manner as a seal structure in a model pre-stressed structure.
In addition, according to the apparatus for testing a model prestressing structure according to the present invention, stability can be evaluated in an environment in which the shape and slope of the model pre-stress structure corresponding to various types of actual environments and various environments in which the actual structures are installed .
1 is a flow chart showing a method of testing a model pre-stress structure using a model pre-stress structure testing apparatus according to the present invention.
Fig. 2 or Fig. 3 shows a device for testing a model pre-stress structure according to the present invention.
4 is a view showing a method of joining a tension member of a model pre-stress structure testing apparatus according to the present invention.
5 is a view showing another embodiment of a method of installing a model pre-stress structure of a model pre-stress structure testing apparatus according to the present invention.
6 is a view showing a support part of a model pre-stress structure testing apparatus according to the present invention.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a flow chart showing a method of testing a model pre-stress structure using a model pre-stress structure testing apparatus according to the present invention, FIG. 2 or FIG. 3 is a view showing a device for testing a model pre-stress structure according to the present invention, FIG. 5 is a view showing another embodiment of a method for installing a model pre-stress structure of a model pre-stress structure testing apparatus according to the present invention, and FIG. 6 is a cross- Fig. 2 is a view showing a support part of a model pre-stress structure testing apparatus according to the invention.
FIG. 1 illustrates a method of testing a model pre-stressed structure using a model pre-stress structure testing apparatus according to the present invention, and includes a modeling step S1 for manufacturing a reduced model pre-stress structure corresponding to a real structure to be tested, (S2) for installing the structure between the supports disposed on both sides of the model prestressing structure testing apparatus and a tension member passing through the model prestressing structure, a tension member mounting step (S4) for setting the tensile force applied to the tension member, And a measurement step S5 of applying a load to the model prestressed structure provided with the pressurized portion of the model prestressing structure testing apparatus and measuring a change in the tensile force applied to the tensional material due to the applied load and the deformation of the structure.
In addition, the measuring step S5 may be configured to measure the deformation of the model pre-stress structure together with the load applied to the model pre-stress structure together with the change of the tensile force.
In addition, a boundary condition setting step (S3b) for setting a lateral boundary condition by restricting the type and direction of deformation applied to the model pre-stress structure between the structure installing step (S2) and the tensile material installing step (S4) .
In addition, in order to adjust the inclination of the model pre-stress structure between the structure installation step S2 and the tension member installation step S4, an installation condition setting step of transporting at least one of the supports positioned on both sides of the model pre- S3a, and may include both the installation condition setting step S3a and the boundary condition setting step S3b.
In addition, when both the installation condition setting step S3a and the boundary condition setting step S3b are included, the above procedure may be changed.
The measuring step S5 can evaluate the transverse-transverse buckling strength by measuring the upper tensile load and the model pre-stress structure pressed and deformed by the pressing portion.
In addition, considering the initial geometric imperfection of the model prestressing structure, it is possible to evaluate not only the transverse - transverse buckling strength but also the tensile strength of the tension member.
In addition, through the installation condition setting step S3a, it is possible to perform the test of the model prestressing structure under the same environment as the various installation environments of the actual structure, and through the boundary condition setting step S3b, the nonlinearity of the material and the geometrical imperfection And so on, so that it is possible to obtain more accurate data.
For example, the transverse boundary conditions may be such that the rotational deformation about the strong axis and the weak axis of the cross section is possible.
In other words, in-plane and out-of-plane flexural deformation is possible and rotational deformation in the longitudinal direction of the beam can be performed in a constrained form.
2 or 3 shows a device for testing a model pre-stressed structure according to the present invention. The device includes a
The supporting
Further, it is possible to calculate lateral strain (warpage) through the tensile force difference of the tensile
In addition, in the direction of the three-dimensional deformation in which not only the transverse direction and the longitudinal direction but also the transverse direction and the longitudinal direction are generated in combination due to the tensile force difference of the plurality of tensile
The
The
At this time, the
The
The
Further, the
The vertical pressing
The pressing force applied through the
In addition, the
That is, even if the
4 is a view showing a method of bonding a tensile material of a model prestressing structure testing apparatus according to the present invention. As shown in FIG. 3 or FIG. 4, the tensile stressed
The
At this time, a tensile
One end of the
The
4 (I-4), the
In addition, the
For example, the
5 shows another embodiment of a method of installing a model pre-stress structure of a model pre-stress structure testing apparatus according to the present invention. The method includes the steps of: 12a are cut so that the inside of the
5 or 6, the
At this time, the
The model
In addition, the
This is achieved by changing the fixing position of the
At this time, the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.
1: Model prestressing structure test equipment
2: Model prestressing structure
11: Frame
12: Support
13: Tension material
14:
15:
15a: Load measuring sensor
16:
17:
18:
120: height fixing screw
121: transverse support shaft
122:
123: longitudinal support shaft
124: longitudinal support
131: Tension support shaft
132:
133:
134:
135: Nut portion
150: Position fixing screw
Claims (5)
A prestressing member coupled to both side supports through a model prestressing structure interposed between the supports;
A tensile force adjusting unit for adjusting a tensile force applied to the tensile member;
A pressing unit for pressing the model pre-stress structure to apply a load;
And a tensile force measuring unit for measuring a change in a tensile force applied to the tensile member while the model pre-stress structure is deformed by a load applied through the pressing unit
Model Prestressed Structural Test System.
Wherein the supporting part supports the model prestressing structure through a pivoting member that freely rotates and freely moves so as not to generate a resistance due to a frictional force at the lateral boundary condition contact surface with the model prestressing structure
Model Prestressed Structural Test System.
And a deformation measuring unit disposed below the model pre-stress structure pressed by the pressing unit to measure deformation of the model pre-stress structure deformed by the pressing unit.
Model Prestressed Structural Test System.
And the support portion is configured to be adjustable in spacing according to the length of the model pre-stress structure
Model Prestressed Structural Test System.
And the support portion is configured to be adjustable in height differently according to the inclination of the model pre-stress structure
Model Prestressed Structural Test System.
Priority Applications (1)
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KR1020150189131A KR101790057B1 (en) | 2015-12-30 | 2015-12-30 | A testing apparatus of model prestress structures |
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KR1020150189131A KR101790057B1 (en) | 2015-12-30 | 2015-12-30 | A testing apparatus of model prestress structures |
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KR20170079025A true KR20170079025A (en) | 2017-07-10 |
KR101790057B1 KR101790057B1 (en) | 2017-10-25 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112213183A (en) * | 2020-10-16 | 2021-01-12 | 大连理工大学 | Test fixture for testing shearing-resistant bearing capacity of wooden pin in wooden structure double-shear connection |
CN114235221A (en) * | 2021-12-20 | 2022-03-25 | 镇江市琦奥金属制品有限公司 | Prestress detection device for steel structure machining |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102094617B1 (en) * | 2018-11-05 | 2020-03-30 | 공주대학교 산학협력단 | Structural performance evaluation device of girder |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100930805B1 (en) * | 2008-08-08 | 2009-12-09 | 성균관대학교산학협력단 | Twister for girder test |
KR101546213B1 (en) | 2015-03-06 | 2015-08-25 | 연세대학교 산학협력단 | The testbed for measuring tensile force and the measuring method thereof |
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2015
- 2015-12-30 KR KR1020150189131A patent/KR101790057B1/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112213183A (en) * | 2020-10-16 | 2021-01-12 | 大连理工大学 | Test fixture for testing shearing-resistant bearing capacity of wooden pin in wooden structure double-shear connection |
CN114235221A (en) * | 2021-12-20 | 2022-03-25 | 镇江市琦奥金属制品有限公司 | Prestress detection device for steel structure machining |
CN114235221B (en) * | 2021-12-20 | 2024-05-14 | 镇江市琦奥金属制品有限公司 | Prestress detection device for steel structure machining |
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