KR101790057B1 - A testing apparatus of model prestress structures - Google Patents

A testing apparatus of model prestress structures Download PDF

Info

Publication number
KR101790057B1
KR101790057B1 KR1020150189131A KR20150189131A KR101790057B1 KR 101790057 B1 KR101790057 B1 KR 101790057B1 KR 1020150189131 A KR1020150189131 A KR 1020150189131A KR 20150189131 A KR20150189131 A KR 20150189131A KR 101790057 B1 KR101790057 B1 KR 101790057B1
Authority
KR
South Korea
Prior art keywords
model
pressing
tensile force
tensile
prestressing
Prior art date
Application number
KR1020150189131A
Other languages
Korean (ko)
Other versions
KR20170079025A (en
Inventor
이종한
Original Assignee
대구대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 대구대학교 산학협력단 filed Critical 대구대학교 산학협력단
Priority to KR1020150189131A priority Critical patent/KR101790057B1/en
Publication of KR20170079025A publication Critical patent/KR20170079025A/en
Application granted granted Critical
Publication of KR101790057B1 publication Critical patent/KR101790057B1/en

Links

Images

Classifications

    • 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
    • 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
    • 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
    • G01N2203/0676—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

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

[0001] The present invention relates to a testing apparatus for model prestress structures,

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 of preventing lateral buckling and measuring the stability of a test object such as the Korean Patent Laid-Open No. 10-2015-0138455, "Lateral buckling prevention system of 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.

Korean Patent Laid-Open No. 10-2015-0138455 entitled "Lateral buckling prevention system of a test body"

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 support 11 disposed on both sides of the frame 11 for mounting a reduced model pre- stressed structure 2 corresponding to the actual structure to be tested, A plurality of tension members 13 coupled to the both side support portions 12 through the model prestressing structure 2 interposed between the support member 12 and the support portion 12 and a plurality of tension members 13 coupled to the side support portions 12 to adjust the tensile force applied to the tension members 13. [ The model prestressing structure 2 is deformed by a plurality of tension adjusting portions 14 and a pressing portion 15 for applying a load by pressing the model precessing structure 2 and a load applied through the pressing portion 15, And a plurality of tensile force measurement units 16 for measuring a change in the tensile force applied to the tensile member 13.

The supporting portion 12 can be adjusted in its position to be coupled to the frame 11 by the height fixing screw 120 so that the interval between the supporting portions 12 can be adjusted according to the length and height of the model pre- Will be described in more detail.

Further, it is possible to calculate lateral strain (warpage) through the tensile force difference of the tensile force measuring unit 16 arranged horizontally horizontally on both sides of the plurality of tensile force measuring units 16, It is possible to calculate the longitudinal deformation (warpage) through the tensile force difference of the tensile force measuring unit 16 vertically arranged in the vertical direction on the upper and lower sides of the portion 16.

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 force measurement units 16 arranged in the lateral direction and the longitudinal direction Analysis is possible.

The deformation measuring unit 18 disposed below the model pre-stress structure 2 pressed by the pressing unit 15 to measure deformation of the model pre-stress structure 2 deformed by the pressing unit 15, As shown in FIG.

The deformation measuring unit 18 measures the deformation by measuring the height at which the pressing unit 15 is displaced from the position before the pressing unit 15 presses the model pre-stress structure 2 while the pressing unit 15 presses the model pre- .

At this time, the deformation measuring unit 18 may be performed through a contact measuring method of measuring through a load transmitted by pressing, or by a non-contact measuring method such as a laser, a vision, an ultrasonic wave, ≪ / RTI >

The pressing portion 15 may be configured to adjust a position of the pressing portion 15 fixed to the frame 11 by adjusting a position fixed by the plurality of position adjusting screws 150, The fixing position of the position adjusting screw 150 which is coupled to the groove 120C and fixes the pressing portion 15 to the frame 11 can be changed along the pressing adjusting groove 120C to change the position of the pressing portion.

The pressing portion 15 is lowered by the pressing means 17 to press the model precess structure 2 and the load portion for measuring the load applied to the model precess structure 2 by the pressing portion 15 It is preferable to further include a sensor 15a to accurately measure a load applied by the pressing portion 15. The pressing means 17 may be a manually operated type that is rotated by an experimenter, Or it may be an automatic type configured to lower the pressurizing portion 15 until a preset pressure is achieved.

Further, the pressing portion 15 may further include vertical pressing portions 15b and 15c at the lower end so that a vertical force always acts on the model pre-stress structure 2,

The vertical pressing portions 15b and 15c are provided with spherical balls 15b which are in point contact with the ends of the pressing portions 15 and balls 15b which are drawn by a predetermined depth to prevent deviation of the spherical balls 15b And a ball support 15c for supporting the ball.

The pressing force applied through the pressing portion 15 is applied to the model prestressing structure 2 through the ball 15b and the ball supporting body 15c as shown in the sectional view of FIG. 2 (2-II) The ball 15b is arranged in point contact with the pressing portion 15 even if the upper surface of the model pre-stress structure 2 is deformed by the pressing force and the ball supporting body 15c which is in contact with the upper surface of the ball supporting body 15c is inclined It becomes possible to press the model pre-stress structure 2 in a vertical form at all times.

In addition, the ball 15b is not limited to a shape tilted to one side as shown in the sectional view, but can always transmit a force in a direction perpendicular to the tilted direction.

That is, even if the model prestressing structure 2 is tilted in any direction by deformation, it can always be pressed in the vertical direction.

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 material 13 passes through the model prestressing structure 2, 12, respectively.

The tension member support 132 is configured to be rotatable by the tension member support shaft 131 so that the model pre-stress structure 2 is deformed by the pressing member 15 so that the tensile direction of the tension member 13 is downward and transverse It is possible to always maintain the direction perpendicular to the tensile member 13.

At this time, a tensile force measuring unit 16 is installed on one of the tensile support parts 132 of the tensile support parts 132 disposed on the support part 12 to measure the tensile force of the tensile force generated on the other side.

One end of the tension member 13 is coupled to the tension member supporting portion 132 disposed on the other side by the tension adjusting portion 14 and the pressing portion 15 is connected to the model pre- The initial tensile force applied to the tensile member 13 is adjusted (set).

The tension adjusting unit 14 includes a bolt 133 that is inserted through the tension member 13 and a tension member 134 that is coupled to the end of the bolt 133 and is engaged with the tension member 13, And a nut 135 which is screwed to a thread formed on the outer circumferential surface of the bolt 133 and rotates along the thread of the bolt 133 in accordance with rotation to press the tension portion 134 in the other direction .

4 (I-4), the nut portion 135 is rotated in the other direction as shown in (4-II) of FIG. 4 to rotate the nut portion 135 A predetermined tensile force can be applied to the tensile member 13 and the tensile force of the tensile member 13 can be changed according to the distance that the nut member 135 has been moved along the thread of the bolt portion 133 Whereby the initial tensile force of the tension member 13 can be adjusted.

In addition, the tension adjusting unit 14 may have a different configuration as long as it can adjust the tensile force applied to the tension member 13, in addition to the above-described configuration.

For example, the nut portion 135 and the tension portion 134 may be integrally formed, and the bolt portion 133 screwed to the thread portion (thread portion of the nut portion) formed in the tension portion 134 may be rotated to adjust the tension It is.

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 support portion 12 is cut away.

5 or 6, the support part 12 includes a pivoting member (a bearing, a roller, a ball, and the like) that freely rotates and freely moves so as not to generate a resistance due to a frictional force at a contact surface with the model pre- The pivoting member is rotatably supported by a plurality of transverse support shafts 121 in both lateral directions of the model prestressing structure 2 and is fixed to be movable up and down by a plurality of transverse support shafts 121. [ And a longitudinal support portion 124 which is fixed by a longitudinal support shaft 123 at a lower side of the model prestressing structure 2 so as to be rotatable and laterally movable.

At this time, the longitudinal support portion 124 performs a simply supported boundary condition.

The model pre-stress structure 2 is fixed to the model pre-stress structure 2 in a state in which the load transmitted by the pushing portion 15 by the pivoting member is not lost by the frictional force when the pushing structure 15 is pressed and deformed. It is possible to accurately test the degree of deformation of the model pre-stress structure 2 and the tensile force change of the tensile member 13 according to the load.

In addition, the support portions 12 may be configured to be adjustable in height according to the inclination of the model pre-stress structure.

This is achieved by changing the fixing position of the height fixing screw 120 which is coupled to the position adjusting groove 120B formed in the frame 11 and fixing the supporting portion 12 to the frame 11 along the position adjusting groove 120B, The inclination of the model pre-stress structure 2 can be changed from (5-I) to (5-II) in FIG.

At this time, the transverse support portion 122 supporting both sides of the model prestressing structure 2 is moved upward and downward along the transverse support shaft 121 so that the model prestressing structure 2 can support both directions without resistance even if it tilts. It is preferable to be configured to be transported.

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 support disposed on either side of the frame for mounting the model prestressing structure;
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 deformed model precess structure is deformed by a load applied through the pressing unit,
Wherein the frame is formed with a pressure adjusting groove, a position adjusting screw is coupled to the pressure adjusting groove,
Wherein the frame is formed with a pressure adjusting groove, a position adjusting screw for fixing the pressing portion to the frame is coupled to the pressure adjusting groove,
The position of the pressing portion is changed by the fixing position of the position adjusting screw which is changed along the pressing adjusting groove,
The supporting portion may be configured to adjust the height of each side of the frame so that the inclination of the structure can be changed
And a fixing position of a height fixing screw for fixing the supporting portion to the frame is changed along a position adjusting groove formed in the frame.
Model Prestressed Structural Test System.
The method according to claim 1,
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.
The method according to claim 1,
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.
The method according to claim 1,
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.
delete
KR1020150189131A 2015-12-30 2015-12-30 A testing apparatus of model prestress structures KR101790057B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150189131A KR101790057B1 (en) 2015-12-30 2015-12-30 A testing apparatus of model prestress structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150189131A KR101790057B1 (en) 2015-12-30 2015-12-30 A testing apparatus of model prestress structures

Publications (2)

Publication Number Publication Date
KR20170079025A KR20170079025A (en) 2017-07-10
KR101790057B1 true KR101790057B1 (en) 2017-10-25

Family

ID=59356052

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150189131A KR101790057B1 (en) 2015-12-30 2015-12-30 A testing apparatus of model prestress structures

Country Status (1)

Country Link
KR (1) KR101790057B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102094617B1 (en) * 2018-11-05 2020-03-30 공주대학교 산학협력단 Structural performance evaluation device of girder

Citations (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102094617B1 (en) * 2018-11-05 2020-03-30 공주대학교 산학협력단 Structural performance evaluation device of girder

Also Published As

Publication number Publication date
KR20170079025A (en) 2017-07-10

Similar Documents

Publication Publication Date Title
JP5002827B2 (en) Shear testing device for rock discontinuities
KR101788618B1 (en) model prestress structures test methods
US8857265B2 (en) System and method for aligning a test article with a load
CN108333046B (en) Device for measuring mechanical property of membrane material and method for measuring by adopting device
CN109752242B (en) Compression shear test device
KR102368246B1 (en) System and method for testing compression panels
KR20150006155A (en) Performance testing device for cylinder
CN105698650A (en) Supporting roller type test device for dynamically monitoring bending angle
US20080028865A1 (en) Portable Deflection Instrument for Testing Installed Planks
KR101686207B1 (en) Apparatus for measuring friction of vibrating structures
KR101790057B1 (en) A testing apparatus of model prestress structures
KR100917265B1 (en) Apparatus for testing bi-axial load
US7348502B2 (en) Counterbalance for a platform balance
US20100126257A1 (en) Large Diameter Hardness Tester
CN204903298U (en) Drawing - shearing preloads normal position indentation testing arrangement
KR101628705B1 (en) Portable Fixing Apparatus for Tester
KR101337954B1 (en) Method and apparatus for measuring extensity of metallic meterial
CN211235238U (en) Device for detecting bending tensile strength of concrete prism
JP2006509188A (en) Sample table for measuring lateral force and lateral displacement
JP7115703B2 (en) Compression test equipment
Ljubinkovic et al. Experimental analysis of unstiffened cylindrically curved panels
KR20150074983A (en) Apparatus for evaluating impact physical properties of sheet
KR101718411B1 (en) Underground deformation measuring apparatus
JPH08178770A (en) Device and method for measuring tension of rope
JPH037896B2 (en)

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant