Loading device and method for tensile bearing capacity test of full-scale inner and outer double-ring flanges

Abstract

The invention relates to the technical field of full-scale large double-ring flange loading test devices, and discloses a loading device for a full-scale inner and outer double-ring flange tensile bearing capacity test, in which a vertical supporting pipe, a transverse supporting piece and a box girder play a role in supporting a flange test piece; enough space and counterforce are provided for the full-scale inner and outer double-ring flanges, so that the test can be stably carried out; in addition, the upper distribution beam, the lower distribution beam, the support column A and the support column B form a force transmission structure, so that the load applied by the actuator can be accurately and effectively transmitted to the flange test piece, and the support structure and the force transmission structure are combined with the compression-shear equipment; the problems that the multi-point loading precision of a traditional flange self-balancing loading device is difficult to guarantee, manpower and material resource consumption is large, and the loading capacity is insufficient are solved, and the requirements of full-scale inner and outer double-ring flange shaft pulling and deflection pulling bearing capacity testing are met.

Description

Technical Field

[0001] The present invention relates to the field of full-scale large double-ring flange loading test devices, and specifically to a loading device and method for the tensile bearing capacity test of full-scale inner and outer double-ring flanges. Background Art

[0002] In UHV and long-span transmission tower projects, double-ring flange joints are widely used for their high bearing capacity and reliable connection. In order to more accurately study the mechanical properties and deformation characteristics of double-ring flange joints, full-scale model tests are often required for loading. Full-scale means that the flange is manufactured according to the dimensions required by the actual project, rather than a scaled-down model. In transmission towers, double-ring flanges need to bear tens of thousands of tons of load, and their mechanical properties and deformation characteristics must be verified through a 1:1 full-scale model. Full-scale manufacturing ensures the reliability of the flange under actual working conditions and avoids structural failure caused by dimensional errors, so as to evaluate the bearing capacity performance and engineering reliability of double-ring flange joints.

[0003] There are also many existing node bearing capacity test loading devices. For example, the patent with publication number CN105841949A discloses an automatic control double-direction load co-action performance test device and method for flange joints, which uses the method of parallel connection of two jacks, similar to a self-balancing device, to test the tensile and bending performance of flange joints.

[0004] For example, the patent with publication number CN114018689A discloses an assembled beam-column joint performance test device and method, which uses a self-balancing device vertically and an actuator horizontally for two-way loading, overcoming the problems of large error in the horizontal force provided by the jack and uneven stress on the end plate of the chevron column joint.

[0005] For example, the patent with publication number CN112129620A discloses a pipe joint loading test distribution beam, test device and test method, which can solve the problem of low test accuracy of the existing pipe joint loading test device.

[0006] For example, the patent with publication number CN206740541U discloses a device for measuring the bearing capacity of a column under horizontal load, which fixes the actuator through a horizontal through hole and in a steel beam bracket, and is suitable for the bearing capacity test of large column members.

[0007] For example, the patent with publication number CN205642868U discloses a chevron column joint two-way load co-action performance test device. The horizontal load of the test device is loaded by an actuator, and the stroke of the actuator can be flexibly adjusted. High-precision control is achieved by a computer during the loading process. At the same time, a base and a pressing beam are arranged at the bottom of the test piece to effectively prevent the test piece from moving during the test, and the test accuracy is high; The patent with publication number CN208043562U discloses a freely movable reaction loading frame for concrete beams, which facilitates the observation of the crack trend of concrete beams and the measurement of crack widths, and enables the free movement of the reaction loading frame; The patent with publication number CN105758658A discloses a test loading device capable of realizing multi-point load distribution for large-scale models. Through a load distribution system with a space-radiating cable-stayed beam as the main body, the load applied by the jack to the middle flying column can be automatically and accurately distributed to each loading point of the test specimen according to the stiffness of the radial beams and diagonal tension rods in each radiation direction, thus simplifying multi-point loading into single-point loading and reducing the number of bearing frames and jacks required for the test; The patent with publication number CN106092545A discloses a static load test loading device for a steel structure frame body, which can realize vertical load loading and accurately measure the actual loading force of each column, with the advantages of reliable force bearing, simple device, convenient operation, and safe loading; The patent with announcement number CN205665109U discloses a portable performance test device for the co-action of bidirectional loads on a tubular joint. This device applies axial pressure to the main pipe through a reaction frame and provides vertical force for the branch pipe by a hydraulic jack to overcome the problems of large errors in providing horizontal force by the hydraulic jack and considering the gravity of the branch pipe.

[0008] In summary, there are many drawbacks in the existing devices used in the full-scale tensile bearing capacity test device for inner and outer double-ring flanges, which are summarized as follows: Currently, the conventional loading method for the flange joint bearing capacity test is a self-balancing device with two jacks in series. The upper and lower ends of the flange are respectively connected to the distribution beams, and the two jacks are arranged on two distribution beams, and synchronous loading is carried out through two parallel jacks. However, this method has obvious deficiencies, including: Whether the two jacks can work precisely and coordinately will have a great impact on the test results, and usually two sensors need to be connected to the two jacks, inevitably resulting in errors; The device installation is relatively complex, involving the hoisting of distribution beams and jacks, and the self-balancing device needs to be reassembled after each test. Especially in the case of large full-scale double-ring flanges, it requires a large amount of human resources and takes a long time; It is necessary to move the positions of the two jacks to realize the axial tension and eccentric tension tests of the joint, but moving the jacks requires the cooperation of a crane, which is difficult; Therefore, there are few studies on devices specifically for full-scale large double-ring flanges in UHV and long-span transmission tower projects. Moreover, due to the special characteristics of full-scale double-ring flanges, such as being larger in size and higher in bearing capacity compared to traditional flanges, if the above traditional self-balancing loading device is used, it will obviously result in insufficient loading capacity of the device and huge consumption of human and material resources. Even with a large loading device, without a suitable force transmission structure, it is still impossible to eliminate the error of balanced force during the experiment. To meet the bearing capacity requirements of full-scale tensile tests on internal and external double-ring flanges and minimize experimental errors as much as possible when testing full-scale internal and external double-ring flanges, a loading device suitable for the tensile bearing capacity test of full-scale internal and external double-ring flanges needs to be proposed. Summary of the Invention

[0009] In view of the deficiencies of the prior art, the present invention provides a loading device and method for the tensile bearing capacity test of full-scale internal and external double-ring flanges to solve the above problems.

[0010] To achieve the above objectives, the present invention is realized through the following technical solutions.

[0011] A loading device for the tensile bearing capacity test of full-scale internal and external double-ring flanges includes a compression-shear device, an upper distribution beam, support column A, support column B, a box girder, a vertical support pipe, a horizontal support member, a lower distribution beam, and a flange specimen. An actuator is provided on the compression-shear device, the upper surface of the upper distribution beam faces the actuator, the box girder is connected to the flange specimen, support column A and support column B are horizontally symmetrically arranged on the upper distribution beam with the central axis of the flange specimen on the box girder as the axis of symmetry, the central position of the upper distribution beam corresponds to the central axis of the flange specimen, the vertical support pipes are fixedly connected in an array along the perimeter and middle of the box girder, the horizontal support member is horizontally connected to the vertical support pipes on both sides, the lower distribution beam is movably inserted through the vertical support pipes, the lower distribution beam is connected to the flange specimen, and both ends of the lower distribution beam are connected to support column A and support column B. The upper distribution beam, the lower distribution beam, support column A, and support column B form a force transmission structure to ensure that the load applied by the actuator can be accurately and effectively transmitted to the flange specimen. And support column A and support column B are symmetric about the central axis of the flange specimen on the box girder. After the upper distribution beam receives the pressure applied by the actuator, the entire flange specimen can be in balanced force. The lower distribution beam is connected to the lower end of the flange specimen by M52 bolts and forms a force transmission structure with support column A and support column B to accurately distribute the load to the flange specimen. The lower distribution beam is provided with movable holes for the insertion and installation of the vertical support pipes and the displacement of the lower distribution beam when the flange specimen is damaged during the test. The combination of the support structure and the force transmission structure with the compression-shear device overcomes the problems of difficult-to-guarantee multi-point loading accuracy, large consumption of human and material resources, and insufficient loading capacity of the traditional flange self-balancing loading device, and meets the requirements of full-scale tensile and eccentric tensile bearing capacity tests of internal and external double-ring flanges.

[0012] Preferably, both support column A and support column B are concrete-filled steel tubes.

[0013] Preferably, the vertical support pipe is a square steel pipe, and a square steel plate is welded to the bottom of the vertical support pipe. The vertical support pipe, the horizontal support member, and the box girder play a supporting role for the flange specimen. A square steel plate is welded to the bottom of the vertical support pipe to increase the contact area with the ground, making the loading device more stable. The vertical support pipes are connected by horizontal support members to form a stable support structure, providing sufficient space and reaction force for the full-scale inner and outer double-ring flanges to ensure the stable progress of the test.

[0014] Preferably, the horizontal support member is an I-beam.

[0015] Preferably, the compression-shear equipment is a 1000T microcomputer-controlled electro-hydraulic servo compression-shear testing machine.

[0016] Preferably, the vertical support pipes are welded and fixed in an array around the box girder.

[0017] Preferably, the horizontal support members are arranged in an array in turn between the vertical support pipes.

[0018] Preferably, the box girder and the flange specimen are connected by M52 bolts in a circular array.

[0019] Preferably, the lower distribution beam is connected to the flange specimen by M52 bolts in a circular array. The lower distribution beam is provided with movable holes, and the size is larger than the maximum cross-section of the vertical support pipe.

[0020] A test method for the tensile bearing capacity of a full-scale inner and outer double-ring flange includes the following steps: Step 1, first place the lower distribution beam on the horizontal ground, and the lower end of the flange specimen is connected and fixed to the lower distribution beam by M52 bolts; the size of the movable holes on the lower distribution beam is larger than the maximum cross-section of the vertical support pipe, and the lower distribution beam can move vertically up and down on the vertical support pipe. Step 2, connect and fix the box girder, the vertical support pipe, and the horizontal support member. After determining the corresponding hoisting positions, lift the box girder and insert it through the vertical support pipe into the position of the movable hole of the lower distribution beam. After landing, the upper end of the flange specimen is connected to the box girder by M52 bolts. Step 3, lift the support column A and the support column B, and place them horizontally and symmetrically on the lower distribution beam with the central axis of the flange specimen as the symmetry axis and connect them. Step 4, place the upper distribution beam in the middle on the support column A and the support column B, connect and fix it, and mark the center position on the upper surface of the upper distribution beam. Step 5, after the overall installation is completed, conduct the tensile bearing capacity test of the full-scale inner and outer double-ring flange respectively: When conducting the axial tension test of the full-scale inner and outer double-ring flange, ensure that the loading point of the actuator coincides with the center mark of the upper distribution beam, and the horizontal distances from the support column A and the support column B to the loading point are equal, and the distributed forces are also the same. When conducting the full-scale internal and external double-ring flange eccentric tension test, the position of the loading point needs to be moved away from the center mark of the upper distribution beam according to the eccentricity required for the test. At this time, the horizontal distances between the support column A and the support column B from the loading point are not equal, and the distributed forces are also different; Step 6: Finally, according to the loading conditions of the full-scale internal and external double-ring flange tensile bearing capacity test in Step 5, apply a vertical load through the actuator on the compression-shear equipment controlled by a computer until the flange specimen is damaged, and record the load and displacement data during the test through sensors to complete the full-scale internal and external double-ring flange tensile bearing capacity test.

[0021] Compared with the prior art, the present invention discloses a loading device and method for the full-scale internal and external double-ring flange tensile bearing capacity test, including a compression-shear equipment, an upper distribution beam, a support column A, a support column B, a box girder, a vertical support pipe, a transverse support member, a lower distribution beam, and a flange specimen. These nine components are used in combination to play a role. Among them, the vertical support pipe, the transverse support member, and the box girder play a role in supporting the flange specimen. A square steel plate is welded at the bottom of the vertical support pipe to increase the contact area between the whole and the ground, making the loading device more stable. The vertical support pipes are connected by the transverse support member to form a stable support structure, providing sufficient space and reaction force for the full-scale internal and external double-ring flange to ensure the stable progress of the test; In addition, the upper distribution beam, the lower distribution beam, the support column A, and the support column B form a force transmission structure to ensure that the load applied by the actuator can be accurately and effectively transmitted to the flange specimen. The support column A and the support column B are symmetric about the central axis of the flange specimen on the box girder. After the upper distribution beam receives the pressure applied by the actuator, the whole flange specimen can be balanced in force. The lower distribution beam is connected to the lower end of the flange specimen by M52 bolts and forms a force transmission structure with the support column A and the support column B to accurately distribute the load to the flange specimen. The lower distribution beam is provided with movable holes for the insertion and installation of the vertical support pipe and the displacement of the lower distribution beam when the flange specimen test is damaged; The combination of the support structure and the force transmission structure with the compression-shear equipment overcomes the problems of difficult to guarantee the accuracy of multi-point loading, large consumption of human and material resources, and insufficient loading capacity of the traditional flange self-balanced loading device, and meets the needs of the full-scale internal and external double-ring flange axial tension and eccentric tension bearing capacity tests. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the loading device for the full-scale internal and external double-ring flange tensile bearing capacity test of the present invention; Figure 2 It is a schematic structural diagram of the upper distribution beam of the present invention; Figure 3 It is a sectional schematic structural diagram of the upper distribution beam of the present invention; Figure 4Structural schematic diagram of support column A and support column B of the present invention; Figure 5 Structural bottom schematic diagram of the lower distribution beam of the present invention; Figure 6 Structural sectional view of the lower distribution beam of the present invention; Figure 7 Structural schematic diagram of the box girder of the present invention; Figure 8 Structural sectional view of the box girder of the present invention; Figure 9 Structural schematic diagram of the vertical support pipe and the horizontal support member of the present invention; Figure 10 Bottom view of the structure of the vertical support pipe and the horizontal support member of the present invention; Figure 11 Schematic diagram of the connection relationship among support column A, support column B, lower distribution beam, box girder, and flange specimen of the present invention. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Loading device for full-scale tensile bearing capacity test of inner and outer double-ring flanges, comprising a compression-shear device 101, an upper distribution beam 103, a support column A 104, a support column B 105, a box girder 106, a vertical support pipe 107, a lateral support member 108, a lower distribution beam 109, and a flange specimen 110. An actuator 102 is provided on the compression-shear device 101. The compression-shear device 101 includes an actuator 102, an electric control system, a hydraulic source system, and a power electric system. The systems are not elaborated in this solution. It should be noted that although the compression-shear device is an existing device and has the function of the left and right displacement of the actuator 102, the model of the compression-shear device adopted in this solution is a 1000T microcomputer-controlled electro-hydraulic servo compression-shear testing machine, which is a model selected to be adapted to the full-scale inner and outer double-ring flanges. The actuator 102 provides load for the electro-hydraulic servo, can issue a loading signal to precisely control the actuator 102 to load the specimen, and the sensors connected to it feedback the signals for closed-loop control, which can achieve precise control of the load size and record the test data. The computer issues a loading signal to control the actuator 102 to load the specimen, and the displacement sensor and load sensor feedback the signals for closed-loop control. The purpose of this solution is the structure of the loading device. The specific sensors or computer connections and processing are existing technologies and are not elaborated in this solution. Conventional force sensors and displacement sensors can be used for the sensors, which can completely record the applied load and displacement, draw the load-displacement curve, and complete the research on the tensile bearing capacity test of the full-scale inner and outer double-ring flanges. The maximum compression load of the actuator 102 is 10000 kN, while the maximum tensile load is 3000 kN. The maximum stroke of the actuator 102 in the horizontal direction is +250 mm, which converts its pressure into the tensile force on the upper nodes of the flange specimen 110 to meet the load requirements of the tensile bearing capacity test of the full-scale inner and outer double-ring flanges.

[0025] The upper surface of the upper distribution beam 103 faces the actuator 102. The box girder 106 is connected to the flange specimen 110. The support column A 104 and the support column B 105 are horizontally symmetrically arranged on the upper distribution beam 103 with the central axis of the flange specimen 110 on the box girder 106 as the axis of symmetry. The central position of the upper distribution beam 103 corresponds to the central axis of the flange specimen 110. The vertical support pipes 107 are fixedly connected in an array along the perimeter and at the middle position of the box girder 106. The lateral support members 108 are horizontally connected to the vertical support pipes 107 on both sides. The lower distribution beam 109 is movably sleeved on the vertical support pipes 107. The lower distribution beam 109 is connected to the flange specimen 110, and both ends of the lower distribution beam 109 are connected to the support column A 104 and the support column B 105.

[0026] Both the box girder 106 and the lower distribution beam 109 are connected to the flange specimen 110 by M52 bolts. The nodal connection bolts in the middle of the flange specimen 110 need to be determined according to the actual working conditions. Generally speaking, the diameter is smaller than that of the M52 bolt. Both the support column A 104 and the support column B 105 are concrete-filled steel tubular columns.

[0027] The vertical support pipe 107 is a square steel pipe, and a square steel plate is welded at the bottom of the vertical support pipe 107 to increase the overall contact area with the ground and make the loading device more stable. The horizontal support member 108 is an I-beam. The vertical support pipes 107 are connected by the horizontal support member 108 to form a stable support structure, providing sufficient space and reaction force for the full-scale inner and outer double-ring flanges to ensure the stable progress of the test. The vertical support pipes 107 are welded and fixed in an array around the box girder 106, and the horizontal support members 108 are arranged in an array in turn between the vertical support pipes 107.

[0028] The box girder 106 is connected to the flange specimen 110 by annularly arrayed M52 bolts. The lower distribution beam 109 is connected to the flange specimen 110 by annularly arrayed M52 bolts. An activity hole 1091 is provided on the lower distribution beam 109, and its size is larger than the maximum cross-section of the vertical support pipe 107. When the flange specimen 110 is damaged, the overall displacement develops towards the ground, and the size of the activity hole 1091 can meet the displacement requirements. Reinforcing ribs are provided in the upper distribution beam 103, the box girder 106, and the lower distribution beam 109.

[0029] The test method for the tensile bearing capacity of the full-scale inner and outer double-ring flanges includes the following steps: Step 1: First, place the lower distribution beam 109 on the horizontal ground, and fix the lower end of the flange specimen 110 to the lower distribution beam 109 by M52 bolts. The size of the activity hole 1091 on the lower distribution beam 109 is larger than the maximum cross-section of the vertical support pipe 107, and the lower distribution beam 109 can move vertically up and down on the vertical support pipe 107. Step 2: Connect and fix the box girder 106, the vertical support pipe 107, and the horizontal support member 108. After determining the corresponding hoisting positions, lift the box girder 106 and insert it through the vertical support pipe 107 into the position of the activity hole 1091 of the lower distribution beam 109. After landing, connect the upper end of the flange specimen 110 to the box girder 106 by M52 bolts. Step 3: Lift the support column A 104 and the support column B 105, and place them horizontally and symmetrically on the lower distribution beam 109 with the central axis of the flange specimen 110 as the symmetry axis and connect them. Step 4: Place the upper distribution beam 103 in the middle on both the support column A 104 and the support column B 105, connect and fix it, and mark the central position on the upper surface of the upper distribution beam 103. Step 5: After the overall installation is completed, conduct the full-scale tensile bearing capacity tests for the inner and outer double-ring flanges respectively: When conducting the full-scale axial tension test for the inner and outer double-ring flanges, ensure that the loading point of the actuator 102 coincides with the center mark of the upper distribution beam 103, and the horizontal distances from the support column A 104 and the support column B 105 to the loading point are equal, and the distributed forces are also the same; When conducting the full-scale eccentric tension test for the inner and outer double-ring flanges, the position of the loading point needs to be moved away from the center mark of the upper distribution beam 103 according to the required eccentricity of the test. At this time, the horizontal distances from the support column A 104 and the support column B 105 to the loading point are not equal, and the distributed forces are also different; Step 6: Finally, according to the loading conditions of the full-scale tensile bearing capacity tests for the inner and outer double-ring flanges in Step 5, apply a vertical load through the actuator 102 on the compression-shear device 101 controlled by a computer until the flange specimen 110 is damaged, and record the load and displacement data during the test through sensors to complete the full-scale tensile bearing capacity tests for the inner and outer double-ring flanges.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Loading device for full-scale inner and outer double-ring flange tensile bearing capacity test, characterized by: It includes a compression-shear device (101), an upper distribution beam (103), a support column A (104), a support column B (105), a box beam (106), a vertical support pipe (107), a transverse support member (108), a lower distribution beam (109), and a flange specimen (110). The compression and shearing device (101) is provided with an actuator (102), the upper surface of the upper distribution beam (103) faces the actuator (102), the box beam (106) is connected to the flange specimen (110), the support column A (104) and the support column B (105) are arranged horizontally symmetrically on the upper distribution beam (103) with the central axis of the flange specimen (110) on the box beam (106) as the axis of symmetry, and the center position of the upper distribution beam (103) is aligned with the flange specimen (110). 0), the vertical support tube (107) is fixedly connected to the middle position array along the four sides of the box beam (106), the transverse support member (108) is horizontally connected to the vertical support tube (107) on both sides, the lower distribution beam (109) is movably arranged on the vertical support tube (107), the lower distribution beam (109) is connected to the flange test piece (110), and the two ends of the lower distribution beam (109) are connected to the support column A (104) and the support column B (105).

2. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: Both the support column A (104) and the support column B (105) are steel tube concrete columns.

3. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The vertical support tube (107) is a square steel tube, and a square steel plate is welded to the bottom of the vertical support tube (107).

4. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The transverse support member (108) is an I-beam.

5. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The compression and shearing equipment (101) is a 1000T microcomputer-controlled electro-hydraulic servo compression and shearing testing machine.

6. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The vertical support pipes (107) are welded and fixed in an array along the periphery of the box beam (106).

7. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 6 is characterized in that: The transverse support members (108) are arranged in an array in sequence between the vertical support tubes (107).

8. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The box beam (106) and the flange test piece (110) are connected via an annular array of M52 bolts.

9. The loading device for full-scale inner and outer double-ring flange tensile bearing capacity test according to claim 1 is characterized in that: The lower distribution beam (109) is connected to the flange test piece (110) via an annular array of M52 bolts. A movable hole (1091) is provided on the lower distribution beam (109) and has a size larger than the maximum cross section of the vertical support pipe (107).

10. The method for testing the tensile bearing capacity of full-scale inner and outer double-ring flanges according to claims 1 to 9, characterized in that: The following steps are involved: Step 1: first place the lower distribution beam (109) on a horizontal ground, and the lower end of the flange test piece (110) is connected and fixed to the lower distribution beam (109) by an M52 bolt; the size of the movable hole (1091) on the lower distribution beam (109) is larger than the maximum cross-section of the vertical support pipe (107), and the lower distribution beam (109) can move vertically up and down on the vertical support pipe (107). Step 2: Connect and fix the box girder (106), the vertical support tube (107), and the transverse support member (108). After determining the corresponding hoisting position, lift the box girder (106) and insert it through the vertical support tube (107) to align it with the movable hole (1091) of the lower distribution beam (109). After landing, the upper end of the flange test piece (110) is connected to the box girder (106) by M52 bolts. Step 3, hoist the support column A (104) and the support column B (105), place them horizontally and symmetrically on the lower distribution beam (109) with the center axis of the flange test piece (110) as the symmetry axis, and connect them; Step 4: Place the upper distribution beam (103) centrally on the support column A (104) and the support column B (105), connect and fix them, and mark the center position of the upper surface of the upper distribution beam (103); Step 5: After the overall installation is completed, conduct full-scale inner and outer double-ring flange tensile bearing capacity tests: When conducting the full-scale inner and outer double-ring flange shaft pulling test, ensure that the loading point of the actuator (102) coincides with the center mark of the upper distribution beam (103), and the horizontal distances of the support column A (104) and the support column B (105) from the loading point are equal, and the distributed forces are also the same; When conducting the full-scale inner and outer double-ring flange eccentric pull test, the loading point position needs to be moved away from the center mark of the upper distribution beam (103) according to the eccentric distance required for the test. At this time, the horizontal distances between the support column A (104) and the support column B (105) and the loading point are different, and the distributed forces are also different; Step six, finally, according to the loading conditions of the full-scale inner and outer double-ring flange tensile bearing capacity test in step five, the actuator (102) on the compression and shearing device (101) is controlled by a computer to apply a vertical load until the flange specimen (110) is destroyed, and the load and displacement data during the test are recorded by a sensor, thereby completing the full-scale inner and outer double-ring flange tensile bearing capacity test.

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