KR101954824B1 - Apparatus for ultimate strength test of scaffold joint bracket and method thereof - Google Patents

Abstract

The present invention relates to an ultimate strength test device of a scaffold joint bracket and a test method thereof. The test device of the present invention relates to an ultimate strength test device of a scaffold joint bracket, which test the ultimate strength of the scaffold joint bracket having a plurality of through holes and the deformation thereof according to a load. The test device includes: a test module including a load acting part for applying a load to the through holes while a shackle is coupled to any one of the plurality of through holes provided in the joint bracket and a deformation measuring unit for measuring the deformation degree of the joint bracket according to the load applied to the joint bracket by the load acting part; an interpretation module for modelling the shape of the joint bracket and applying a load to the through holes of the modelled joint bracket so as to interpret the deformation degree of the modeled joint bracket through finite element interpretation; a display module for visualizing the deformation degree of the joint bracket, which has been measured in the test module, and the deformation degree of the modelled joint bracket, which has been interpreted by the interpretation module, and generating physical property information of the joint bracket; and a calculation module for calculating the ultimate strength and the safety factor of the joint bracket by using a preset formula on the basis of the physical property information of the joint bracket, which has been generated by the display module, wherein the load acting part applies a gradually increasing load to the shackle by fixing the joint bracket on the support while the point of action of the load applied to the through holes of the joint bracket and the line of action which connects the center of gravity of the joint bracket coincide. The test device of the present invention configured as above can easily calculate the ultimate strength and safety factor of the scaffold joint bracket through the systematic and reliable test.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a final strength test apparatus and a testing method for a scaffold connecting bracket,

More particularly, the present invention relates to a device for testing the strength of a connecting bracket for a scaffold, and more particularly, to a method of measuring the strength of a connecting bracket by applying a load to a through- The present invention relates to a final strength test apparatus and test method for a connecting bracket for a scaffold to be tested.

In general, shipbuilding marine industry has a lot of complaints and movement of workplaces inevitably due to the nature of the work of producing huge steel structures. Industrial accidents caused by falls and falls of safety accident materials occurring in shipyard yards occupy a high proportion, and strict standards are required.

Scaffolds are installed and used in yards of the shipyard to safely and efficiently carry out the complaint work. Scaffolds are temporarily installed on the work site to facilitate the work of the worksite. They are used for transportation of materials, work platforms for workers, . The installation and dismantling of scaffolds have a great influence on the safety of the workers, so the relevant safety regulations must be met.

Since scaffolds for shipbuilding and marine operations are moved together with structures, structures such as installation and demolition are frequently changed. On the other hand, in the case of construction scaffolds, it is common that the work site is fixed and scaffold installation and demolition work hardly occur until the construction is completed. In addition, shipbuilding offshore structures are mainly made of steel, while construction structures are made of concrete. Shipbuilding scaffolds are installed directly on the structures by welding or clamping.

The difference of the material constituting the above structure is indicated by the difference of the installation method of the scaffold. In the field of the shipbuilding offshore structure using the steel material, scaffold is used from the assembly stage to the seashore. As a result, the scaffold for shipbuilding and marine construction has a different standard of installation method compared to construction equipment.

Currently, each shipyard in Korea installs and uses various types of shipbuilding scaffolds, but most domestic scaffolds are based on scaffolding for construction, which does not reflect the characteristics of the shipbuilding industry. In addition, domestic construction scaffolding regulations are not systematic compared to recognized international standards. Korea National Standard, KS (Korea Industrial Standard), specifies the shipbuilding marine sector, but there is no standard related to shipbuilding marine scaffolding, and it is difficult to specify national standards.

Conventionally, scaffolds of domestic shipbuilding and offshore plants are using scaffolds satisfying BS EN (British European Standard), but scaffolds that meet the above standards are consuming a great amount of foreign exchange for importing scaffolds satisfying the above criteria, , Which is not compatible with the characteristics of domestic shipbuilding and offshore plants.

In order to develop and apply the national standards of scaffolds for shipbuilding and marine industry, it is required to study and develop domestic test methods to test the structural stability and strength of shipbuilding scaffolds.

(Literature 0001) Hybrid Construction Standard Specification: Ministry of Land Transportation 2016

The object of the present invention, which has been made in view of the above points, is to provide a final strength test method of a scaffold for a shipbuilding marine and to judge the safety of the scaffold member from the test method.

The ultimate strength test apparatus for a scaffold connecting bracket according to an embodiment of the present invention includes a scaffold connecting bracket having a plurality of through holes and formed of a steel material, In the test apparatus, a load acting portion for applying a load to the through hole in a state where the shackle is engaged with any one of a plurality of through holes provided in the connection bracket, and a deformation of the connection bracket according to the load applied to the connection bracket at the load acting portion A module for analyzing the degree of deformation of the modeled connecting bracket by means of a finite element analysis by modeling the shape of the connecting bracket and applying a load to the through hole of the modeled connecting bracket, The degree of deformation of the connection brackets measured in the module and the degree of deformation of the modeled connection bracket analyzed by the analysis module And a calculation module for calculating a final strength and a safety factor of the connection bracket on the basis of the display module for generating the physical property information of the connection bracket and the physical property information of the connection bracket generated in the display module, , The connecting bracket is fixed to the supporting frame with the operating line connecting the point of action of the load applied to the through-hole of the connecting bracket and the center of gravity of the connecting bracket, and a gradually increasing load is applied to the shackle.

Further, the load acting portion can apply a normal tensile force to the through-hole of the connection bracket while the lower portion of the connection bracket is welded to the support.

The test module may further include a control unit for controlling a load applied to the load acting unit such that deformation of the connection bracket measured by the deformation measuring unit has a predetermined speed.

The deformation measuring unit can measure the load applied to the load acting unit by the load cell and measure the degree of deformation of the connection bracket through the linear variable differential transformer (LVDT).

The method for final strength of a connection bracket for a scaffold according to an embodiment of the present invention includes joining a shackle to one of a plurality of through holes provided in a connection bracket, connecting the load application point of the through hole with the shackle and the center of gravity of the connection bracket A load acting step for applying a gradually increasing load to the shackle, a deformation measurement for measuring the degree of deformation of the connecting bracket according to the load applied at the load applying step, The analysis step is to analyze the deformation degree of the modeled connecting bracket by modeling the shape of the connecting bracket through the finite element analysis and applying the load to the through hole of the modeled connecting bracket, Visualize the degree of deformation of the modeled connection brackets analyzed at the analysis stage, By using a predetermined calculation, the final strength and safety properties of connecting brackets, based on the information displayed in the display step and a display step of generating comprises a calculating step of calculating.

In addition, the fixing step, the load acting step, and the deformation measuring step are repeated three or more times, and the displaying step can visualize the property information of each of the repeated connection brackets on one image.

According to one embodiment of the present invention, the final strength test of the connection bracket for scaffolding can be systematically and easily performed.

In addition, visualization is made while comparing the degree of deformation of the connection brackets derived from the test module and the analysis module, and at the same time, property information of the connection bracket is generated, thereby ensuring reliability.

Further, in the case of testing using a testing apparatus according to an embodiment of the present invention, it is easy to repeatedly test different test conditions.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a fixed state of a connection bracket and a support in a load acting portion of a final connection strength test apparatus for a connection bracket according to an embodiment of the present invention; FIG.
FIG. 2 is a coupled state view illustrating a state in which a shackle is coupled to a connection bracket in a load acting portion according to an embodiment of the present invention.
3 is a conceptual view illustrating modeling of a connection bracket in an analysis module according to an embodiment of the present invention.
4 is an exemplary view illustrating an analysis of a connection bracket using a finite element analysis in an analysis module according to an embodiment of the present invention.
5 is a diagram illustrating a graph generated by a display module according to an exemplary embodiment of the present invention.
6 is a block diagram showing a testing apparatus according to an embodiment of the present invention.
7 is a flowchart illustrating a test method according to an embodiment of the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It should be understood, however, that the embodiments according to the concepts of the present invention are not intended to be limited to any particular mode of disclosure, but rather all variations, equivalents, and alternatives falling within the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the "inclusive" or "gajida" and the terms are staking the features, numbers, steps, operations, elements, parts or geotyiji to be a combination thereof specify the presence, of one or more other features, integers , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Hereinafter, the present invention will be described in detail.

6 is a block diagram showing a testing apparatus according to an embodiment of the present invention.

Referring to FIG. 6, the apparatus for final connection strength testing for connecting brackets according to an embodiment of the present invention includes a connecting bracket 100 having a plurality of through-holes 110 formed of a steel material, Wherein the connecting bracket has a plurality of through holes provided in the connecting bracket, the connecting bracket having a plurality of through holes formed in the connecting bracket, A deformation measuring unit 220 for measuring a deformation degree of the connection bracket 100 according to a load applied to the connection bracket 100 at the load applying unit 210, And a load is applied to the through hole 110 of the modeled connecting bracket 100 to determine a degree of deformation of the modeled connecting bracket 100. [ And the finite element analysis The degree of deformation of the connection bracket 100 measured by the test module 200 and the degree of deformation of the modeled connection bracket 100 analyzed by the analysis module 300 are visualized, 100 and the final bracket 100 according to the physical properties of the connection bracket 100 generated by the display module 400. The display module 400 may include a display module 400, Wherein the load acting portion 210 has a load acting on the through hole 110 of the connection bracket 100 and a weight of the connection bracket 100, The connection bracket 100 is fixed to the support base 130 in a state in which the connection lines connecting the centers thereof coincide with each other to apply a gradually increasing load to the shackle 120.

1 is a perspective view showing a fixing state of a connection bracket and a support in a load acting part of a final connection strength test apparatus for a connection bracket according to an embodiment of the present invention. In which the connecting brackets are coupled with the shackles.

Referring to FIGS. 1 and 2, the connection bracket 100 used in the present invention includes a plurality of through-holes 110. The plurality of through-holes 110 may be fastened with steel pipes or railings used for scaffolds, and the steel pipes and the like may be connected by the connection brackets 100. The connection bracket 100 is generally provided with two through-holes 110 or three through-holes 110. The connection bracket 100 to be tested in the present invention is provided with three through holes 110. The number of the through holes 110 of the connection bracket 100 may vary according to the purpose of use and the installation environment.

In the present invention, a final strength and a safety factor of the connection bracket 100 are calculated by applying a load to the through hole 110 of the connection bracket 100 to inform the degree of deformation of the connection bracket 100. When the connection bracket 100 is installed or used in a scaffold, a steel pipe or the like is fastened to the through-hole 110 of the connection bracket 100, and an external load or impact applied to the steel pipe causes the connection bracket 100 The sphere 110 may be broken. In the present invention, by applying a load to the through hole 110 of the connection bracket 100, the ultimate strength and the safety factor of the connection bracket 100 are calculated by reflecting the installation and use state of the connection bracket 100.

The test module 200 of the present invention includes a load acting part 210 and a strain measurement part 220. The load acting part 210 applies a load to the through hole 110 of the connection bracket 100 . The shackle 120 is coupled to the through hole 110 to prevent a loss of a load applied to the through hole 110. The shackle 120 is composed of a steel material passing through the through hole 110 and a ring connected to both ends of the steel material so that a load is applied to the through hole 110 by applying a load to the ring.

The connection bracket 100 may be fixed to the support 130 when the force of connecting the action point of the load applied to the through-hole 110 and the action line connecting the center of gravity of the connection bracket 100 reaches a balance of force. Since the connection bracket 100 is fixed in a state where the operation lines are aligned with each other, loss of force applied to the operation opening is prevented, and an eccentric load is prevented from being applied.

In an embodiment of the present invention, the load applied to the through-hole 110 by the load applying unit 210 may be a vertical tensile force. In this case, a vertical tensile force is applied to the shackle 120 coupled to the through hole 110 of the connection bracket 100, and the point of action of the load applied to the through hole 110 and the center of gravity of the connection bracket 100 The connection bracket 100 rotates at a predetermined angle to match the action points. The connection bracket 100 is fixed to the support base 130 in a state where the action points coincide with each other. The support base 130 is fixed to the bottom surface.

The connection bracket 100 may be welded to the support 130. In this case, it is preferable that the welding of the connection bracket 100 is performed along the lower circumference of the connection bracket 100 in a state in which the line of operation agrees with the welding of one point. When the connection bracket 100 and the support member 130 are welded to each other, the connection bracket 100 acts on the lower portion of the connection bracket 100 with a uniform tensile force and minimizes displacement at a fixed position of the connection bracket 100 and the support member 130, More precise measurement is possible for measuring the degree of deformation of the through-hole 110 of the connection bracket 100.

The load applied to the load acting portion 210 is not limited to the vertical tension, but may have various directions and forces within the scope of the present invention.

In an embodiment of the present invention, the load applied to the load acting portion 210 is measured by a load cell. The structure or configuration of the load cell may vary but it must be possible to measure a force of 100 kN or more. The 100 kN is a value according to the maximum capacity of the shackle 120 used in the present invention. The load cell may be installed on a load actuator for applying a load to the through hole 110 of the connection bracket 100 or may be disposed on a line connecting the load actuator to the shackle 120 fastened to the through hole 110 . And may be installed on the support 130. The load mechanism may have various configurations or structures.

The deformation measuring unit 220 measures a deformation of the through hole 110 according to a load applied to the load applying unit 210. In one embodiment of the present invention, the deformation measuring unit 220 includes a linear variable differential transformer (LVDT). The LVDT refers to an electrical transducer that measures a linear distance difference. The LVDT may be coupled to the support 130 to measure the degree of deformation of the connection bracket 100. The location, configuration and structure of the LVDT may vary.

In one embodiment of the present invention, the test module 200 controls the load applied to the load application unit 210 so that the deformation of the connection bracket 100 measured by the deformation measurement unit 220 has a predetermined speed And a control unit 230 for controlling the operation of the apparatus.

The control unit 230 receives the information of the deformation measuring unit 220 and controls the load acting unit 210. In an embodiment of the present invention, the deformation degree of the connection bracket 100 is controlled, The load applied to the ball 110 is gradually increased. The degree of deformation of the connection bracket 100 can be controlled to have a speed of 0.5 mm / min. The deformation measuring unit 220 transmits information about the degree of deformation to the controller 230 and controls the load of the load applying unit 210 in the controller 230. The degree of deformation of the through hole 110 of the connection bracket 100 can be measured more precisely because the load is applied while the degree of deformation of the connection bracket 100 is adjusted through the control unit 230, And the degree of deformation of the through-hole 110 can be more clearly understood.

The controller 230 may be a computer program or a separate device. For example, the controller 230 may use a Data Acquisition System manufactured by National Instruments.

The test module 200 of the present invention can be tested by repeating three or more different connection brackets 100 having the same shape and material.

FIG. 3 is a conceptual view illustrating modeling of a connection bracket in an analysis module according to an embodiment of the present invention, and FIG. 4 is an illustration showing an analysis of a connection bracket using a finite element analysis in an analysis module according to an embodiment of the present invention. And FIG. 5 is an exemplary view illustrating a graph generated in the display module according to an embodiment of the present invention.

The analysis module 300 analyzes the deformation degree of the connection bracket 100 by modeling the connection bracket 100 according to the condition of the test module 200 and applying a virtual load.

3 through 5, in one embodiment of the present invention, the analysis module 300 may use a finite element analysis method. When the finite element analysis method is used, the modeling of the connection bracket 100 can be performed by setting the control group and the test group, respectively. The setting of the control group and the test group used in the present invention is as shown in Table 1.

Table 1. A modeling setting value of the connection bracket 100 set in the analysis module 300; Material Elastic Modulus Poisson's Ratio Yield Stress Ultimate Stress SS400 (control group) 206000 0.3 245 400 SS400 (test group) 206000 0.3 305 427

 Table 2 shows detailed settings of the finite element analysis method used in the analysis module 300 of the present invention.

Table 2. Detailed configuration of finite element analysis method of analysis module 300. Element Type Quad 4 Element 688 Solution Type Implicit Nonlinear Increment 1009 Iteration Method Full Newton - Raphson

The modeled connection bracket 100 to which the conditions shown in Table 1 are applied is subjected to the finite element analysis according to the set values shown in Table 2 above.

The degree of deformation of the connection bracket 100 according to the load analyzed by the analysis module 300 corresponds to the degree of deformation of the connection bracket 100 measured by the test module 200 according to the load.

The display module 400 of the present invention may include physical property information such as strength of the connection bracket 100 measured by the test module 200 and physical property information such as strength of the connection bracket 100 analyzed by the analysis module 300 And visualizes the physical connection information to generate physical property information of the connection bracket 100 for scaffolding. The physical property information generated by the display module 400 may include the strength of the connection bracket 100, the final strength, the boundary point of the elasto-plastic deformation, and the like.

The visualization of the display module 400 may include comparing the information of the test module 200 and the interpretation module 300 on one image to compare the information of the test module 200 and the interpretation module 300 Means input. In an embodiment of the present invention, the visualization may be a graph (G) showing a load applied to the through hole 110 of the connection bracket 100 and a degree of deformation of the connection bracket 100.

In the embodiment of the graph (G), the x-axis is set as the degree of deformation of the connection bracket 100, and the y-axis is set as the load applied to the through-hole 110 so that deformation information of the connection bracket 100 according to the load So that they can be compared and analyzed.

The calculation module 500 of the present invention calculates the strength and the safety factor of the connection bracket 100 through the physical property information and visualization data generated by the display module 400. In the display module 400, (G), the elastic deformation point and the plastic deformation point of the connection bracket 100 are distinguished from each other, and the final strength of the connection bracket 100 is analyzed. A value obtained by dividing the final strength by a load applied at a boundary point between the elastic deformation and the plastic deformation can be calculated as a safety factor. Also, in the graph (G), the load at the point where the curvature of the curve with respect to the deformation degree of the connection bracket 100 changes abruptly can be set as the final strength. The final strength of the connection bracket 100 means a load at a point where breakage of the connection bracket 100 starts.

In the final connection strength testing apparatus for connecting brackets according to the present invention having the configurations described above, the test data is constructed by repeatedly testing a plurality of connection brackets 100, and the test module 200 and the analysis module 300 are compared and analyzed Since the ultimate strength, permissible load, and safety factor of the connection bracket 100 are calculated, systematic testing and reliability are ensured.

The calculation module 500 may be a computer program or a separate device. For example, the calculation module 500 may analyze the curvature of the curved line of the curve (G), calculate a load at the elastic deformation point as a permissible load with a point of curvature 0 as an elastic deformation point, The load at the fracture point is calculated as the final strength at a point where the curvature changes abruptly, and a value obtained by dividing the final strength by the allowable load is calculated as a safety factor.

7 is a flowchart illustrating a test method according to an embodiment of the present invention.

Referring to FIG. 7, the final connection strength test method for connecting brackets according to an embodiment of the present invention includes joining a shackle 120 to one of a plurality of through-holes 110 provided in a connecting bracket 100, A fixing step of fixing the connection bracket 100 to the support base 130 in a state in which a load acting point of the through hole 110 coupled with the shackle 120 and a connection line connecting the center of gravity of the connection bracket 100 are aligned, (S200) for applying a gradually increasing load to the shackle (120), a deformation amount measuring step (S200) for measuring a degree of deformation of the connection bracket (100) according to a load applied in the load applying step In the measuring step S300, the shape of the connection bracket 100 is modeled through a finite element analysis and a load is applied to the through hole 110 of the modeled connection bracket 100, An analysis step S400 of analyzing the degree of deformation, The degree of deformation of the connection bracket 100 measured in the fixing step S300 and the degree of deformation of the modeled connection bracket 100 analyzed in the analysis step S400 are visualized, And a calculation step S600 of calculating the strength and the safety factor of the connection bracket 100 based on the physical property information displayed in the display step S500 using a predetermined calculation formula.

The fixing step S100 is a step of fixing the connecting bracket 100 to the support base 130 in a state where the operating lines are aligned with each other, and the fixing may be performed by welding. The coincidence of the above-mentioned operating lines is as described above in the test module 200 of the connection bracket final strength test apparatus for scaffolding.

The load acting step S200 is a step of applying a load to the shackle 120. The load may be a vertical tensile force and applies a load to the through hole 110 connected to the shackle 120. [ In the load acting step S200, the load acting portion 210 of the final connection strength testing apparatus for connecting brackets may be used.

The deformation measuring step S300 is a step of measuring a deformation degree of the connection bracket 100 according to a load applied to the through hole 110. The deformation degree may be an LVDT. The LVDT may be installed on the support 130. In the deformation measurement step S300, the deformation measuring unit 220 of the final connection strength testing apparatus for bracket may be used.

In an embodiment of the present invention, the degree of deformation of the connection bracket 100 measured in the deformation measuring step S300 is limited to a speed of 0.5 mm / min, and the load applied in the load applying step S200 may be increased have. In this case, the controller 230 can be used.

The analysis step S400 is a step of analyzing the degree of deformation of the connection bracket 100 according to the load through the finite element analysis. The analysis module 300 of the final connection strength testing apparatus for the connection bracket may be used.

The display step S500 of the present invention is a step of generating physical property information of the connection bracket 100. The display step S500 of receiving the information of the deformation measurement step S300 and the analysis step S400, And the physical property information of the connection bracket 100 is generated. In the displaying step S500, the display module 400 of the final connection strength testing apparatus for bracket can be used.

The calculation step S600 calculates the final strength and safety factor of the connection bracket 100 on the basis of the information generated in the display step S500. If the graph G is generated in the display step S500 The graph (G) is analyzed to calculate the boundary points, the ultimate strength, and the safety factor between the elastic deformation and the plastic deformation. The calculation module 500 may be used in the calculation step S600.

In one embodiment of the present invention, the fixing step S100, the load acting step S200 and the deformation measuring step S300 are repeated three or more times, and the displaying step S500 is repeatedly performed on one image The physical property information of each of the connection brackets 100 can be visualized.

When the fixing step S100, the load acting step S200 and the deformation measuring step S300 are repeatedly performed, the connection bracket 100 may be a different entity having the same material and shape. As the above steps are repeatedly performed, the physical property information of each connection bracket 100 is visualized in the display step S500, so that the reliability of the test can be secured.

The ultimate strength test apparatus and test method for a scaffold connecting bracket of the present invention having the above structure or method can calculate final strength, allowable load, and safety factor of the connection bracket 100 through systematic testing, Reliability is ensured by comparative analysis of tests using a computer program. Further, the test apparatus and the test method can more easily measure test data.

100: connection bracket 110: through hole
120: Shackle 130: Support
200: Test module 210: Load acting part
220: strain measuring unit 230:
300: interpretation module 400: display module
500: Output module
G: Graph
S100: Fixing step S200: Load acting step
S300: Deformation measurement step S400: Analysis step
S500: Display step S600: Calculation step

Claims (6)

delete delete delete delete Test method for testing the ultimate strength of connection brackets for scaffolds using a final strength test device for scaffolding connection brackets for testing the final strength and deformation of the scaffolding connection brackets formed of steel and provided with a plurality of through holes As a result,
The final connection strength of the connection bracket for tacking is measured by the following method.
A load module that applies a load to the through hole in a state where the shackle is coupled to one of the through holes, and a deformation measuring unit that measures a deformation degree of the connection bracket in accordance with the load;
An analysis module for modeling the shape of the connecting bracket and applying a load to the through hole of the modeled connecting bracket to analyze the degree of deformation of the modeled connecting bracket through a finite element analysis;
A display module for visualizing the degree of deformation of the connection bracket measured by the test module and the degree of deformation of the modeled connection bracket analyzed by the analysis module and generating physical property information of the connection bracket; And
And a calculation module for calculating a final strength and a safety factor of the connection bracket based on physical property information of the connection bracket generated in the display module using a predetermined calculation formula,
A connecting bracket for connecting the shackle to any one of the plurality of through holes provided in the connecting bracket and connecting the load application point of the through hole through which the shackle is coupled to the center of gravity of the connecting bracket vertically, A fixing step of welding and fixing to a support;
A load acting step of applying a vertical load gradually increasing to the shackle through the test module;
A deformation measuring step of measuring a degree of deformation of the connection bracket according to a load applied in a load applying step through the test module;
An analysis step of modeling the shape of the connection bracket through the analysis module and applying a load to the through hole of the model connection bracket to analyze a degree of deformation of the model connection bracket;
A display step of visualizing the degree of deformation of the connection bracket measured at the deformation measuring step and the degree of deformation of the modeled connection bracket analyzed at the analysis step through the display module to generate physical property information of the connection bracket; And
And calculating a final strength and a safety factor of the connection bracket based on the physical property information displayed in the display step using the calculation module.
6. The method of claim 5,
Wherein the fixing step, the load applying step, and the deformation measuring step are repeated three or more times, and the displaying step visualizes physical property information of each of the repeated connection brackets on one image. Final strength test method.

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