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

Abstract

The present invention relates to the technical field of full-scale large double-ring flange loading test devices, and discloses a loading device for the tensile bearing capacity test of full-scale inner and outer double-ring flanges. Among them, the vertical support pipe, the horizontal support member, and the box girder play a supporting role for the flange specimen, providing sufficient space and reaction force for the full-scale inner and outer double-ring flanges 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 combination of the support structure and the force transmission structure with the compression-shear equipment overcomes the problems of difficult to guarantee the 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 for the axial tension and eccentric tension bearing capacity tests of full-scale inner and outer double-ring flanges.

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 Technique

[0002] In UHV and large-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 node bearing capacity test loading devices in the prior art. For example, the patent with the publication number CN105841949A discloses an automatic control device and method for testing the performance of double-directional loads acting on flange joints, which adopts 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 the 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 errors in the horizontal force provided by the jack and uneven stress on the end plate of the man-column joint.

[0005] For example, the patent with the 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 pipe joint loading test device in the prior art.

[0006] For example, the patent with the 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 applicable to the bearing capacity test of large column members.

[0007] For example, the patent with the publication number CN205642868U discloses a device for testing the performance of double-directional loads acting on a man-column joint. 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 pressure 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;

[0008] The patent with publication number CN208043562U discloses a freely movable concrete beam reaction loading frame, which facilitates the observation of the crack trend of the concrete beam and the measurement of the crack width, and can realize the free movement of the reaction loading frame;

[0009] The patent with publication number CN105758658A discloses a test loading device capable of realizing multi-point load distribution for large-size 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 inclined tie rods in each radiation direction, thus simplifying multi-point loading to single-point loading and reducing the number of bearing frames and jacks required for the test;

[0010] 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, and has the advantages of reliable force bearing, simple device, convenient operation, safe loading, etc.;

[0011] 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 error in providing horizontal force by the hydraulic jack and considering the gravity of the branch pipe.

[0012] 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:

[0013] 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 the two distribution beams, and synchronous loading is carried out through two parallel jacks. However, this method has obvious deficiencies, including:

[0014] 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, and errors are inevitably present;

[0015] 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 flange sizes, a large amount of human resources is required and it takes a long time;

[0016] 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;

[0017] Therefore, there are few experimental devices specifically targeting 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 their large size and high load-bearing capacity compared to traditional flanges, if the above traditional self-balanced loading device is used, it will obviously result in insufficient loading capacity of the device and huge consumption of human and material resources.

[0018] Even if a large loading device is adopted, without a suitable force transmission structure for cooperation, the error of balanced force during the experiment cannot be eliminated either. How to not only meet the load-bearing capacity requirements for the axial tension and eccentric tension tests of full-scale inner and outer double-ring flanges but also minimize the experimental error when testing full-scale inner and outer double-ring flanges requires the proposal of a loading device suitable for the tensile load-bearing capacity test of full-scale inner and outer double-ring flanges. Summary of the Invention

[0019] Aiming at the deficiencies of the prior art, the present invention provides a loading device and method for the tensile load-bearing capacity test of full-scale inner and outer double-ring flanges to solve the above problems.

[0020] To achieve the above objectives, the present invention is realized through the following technical solutions.

[0021] The loading device for the tensile load-bearing capacity test of full-scale inner and outer 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 lateral support member, a lower distribution beam, and a flange specimen.

[0022] 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. The support column A and the 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 at the middle position of the box girder. The horizontal support members are 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 the support column A and the support column B. 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. And the support column A and the support column B are symmetrically arranged with the central axis of the flange specimen on the box girder as the axis of symmetry. After the upper distribution beam receives the pressure applied by the actuator, the overall flange specimen can be evenly stressed. 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 pipes 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 in 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-balanced loading device, and meets the requirements of full-scale internal and external double-ring flange axial tension and eccentric tension bearing capacity tests.

[0023] Preferably, both the support column A and the support column B are concrete-filled steel tubular columns.

[0024] Preferably, the vertical support pipes are square steel pipes, and square steel plates are welded to the bottoms of the vertical support pipes. Among them, the vertical support pipes, the horizontal support members, and the box girder play a supporting role for the flange specimen. Square steel plates are welded to the bottoms of the vertical support pipes to increase the contact area with the ground as a whole, making the loading device more stable. The vertical support pipes are connected by the horizontal support members 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.

[0025] Preferably, the horizontal support members are I-beams.

[0026] Preferably, the compression-shear device is a 1000T microcomputer-controlled electro-hydraulic servo compression-shear testing machine.

[0027] Preferably, the vertical support pipes are welded and fixed in an array along the perimeter of the box girder. [[ID=…]]

[0028] Preferably, the horizontal support members are arranged in an array in sequence between the vertical support pipes.

[0029] Preferably, the box girder and the flange specimen are connected by M52 bolts in a circular array.

[0030] Preferably, the lower distribution beam is connected to the flange specimen by an annular array of M52 bolts. The lower distribution beam is provided with movable holes, and the size thereof is larger than the maximum cross-section of the vertical support pipe.

[0031] The method for testing the tensile bearing capacity of full-scale inner and outer double-ring flanges includes the following steps:

[0032] Step 1: First, place the lower distribution beam on the horizontal ground, and fix the lower end of the flange specimen 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.

[0033] Step 2: Connect and fix the box girder, the vertical support pipe, and the transverse support member. After determining the corresponding hoisting positions, hoist 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, connect the upper end of the flange specimen to the box girder by M52 bolts.

[0034] Step 3: Hoist 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.

[0035] 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 central position on the upper surface of the upper distribution beam.

[0036] Step 5: After the overall installation is completed, conduct the tensile bearing capacity tests on the full-scale inner and outer double-ring flanges respectively:

[0037] When conducting the axial tension test on the full-scale inner and outer double-ring flanges, ensure that the loading point of the actuator coincides with the central mark on 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.

[0038] When conducting the eccentric tension test on the full-scale inner and outer double-ring flanges, move the position of the loading point away from the central mark on the upper distribution beam according to the required eccentricity of the test. At this time, the horizontal distances from the support column A and the support column B to the loading point are not equal, and the distributed forces are also different.

[0039] Step 6: Finally, according to the loading conditions of the tensile bearing capacity test of the full-scale inner and outer double-ring flanges 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 tensile bearing capacity test of the full-scale inner and outer double-ring flanges.

[0040] Compared with the prior art, the present invention discloses a loading device and method for the tensile bearing capacity test of full-scale inner and outer double-ring flanges, including a compression-shear device, 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. The nine are used in combination to play a role.

[0041] Among them, the vertical support pipe, the transverse 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 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 enough space and reaction force for the full-scale inner and outer double-ring flanges to ensure the stable progress of the test.

[0042] 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.

[0043] The combination of the support structure and the force transmission structure and the compression-shear device 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 axial tension and eccentric tension bearing capacity tests of full-scale inner and outer double-ring flanges. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the loading device for the tensile bearing capacity test of full-scale inner and outer double-ring flanges of the present invention;

[0045] Figure 2 It is a schematic structural diagram of the upper distribution beam of the present invention;

[0046] Figure 3 It is a schematic sectional view of the structure of the upper distribution beam of the present invention;

[0047] Figure 4 It is a schematic structural diagram of the support column A and the support column B of the present invention;

[0048] Figure 5 It is a schematic bottom view of the structure of the lower distribution beam of the present invention;

[0049] Figure 6 It is a schematic sectional view of the structure of the lower distribution beam of the present invention;

[0050] Figure 7 Structural schematic diagram of the box girder of the present invention;

[0051] Figure 8 Structural sectional view of the box girder of the present invention;

[0052] Figure 9 Structural schematic diagram of the vertical support pipe and the horizontal support member of the present invention;

[0053] Figure 10 Bottom view of the structure of the vertical support pipe and the horizontal support member of the present invention;

[0054] Figure 11 Schematic diagram of the connection relationship among the support column A, support column B, lower distribution beam, box girder, and flange specimen of the present invention. Specific implementation mode

[0055] 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.

[0056] Loading device for full-scale tensile bearing capacity test of double-ring flange inside and outside, including compression-shear equipment 101, upper distribution beam 103, support column A 104, support column B 105, box girder 106, vertical support pipe 107, transverse support member 108, lower distribution beam 109, flange specimen 110. An actuator 102 is provided on the compression-shear equipment 101. The compression-shear equipment 101 includes an actuator 102, an electric control system, a hydraulic source system, and a power electric system. The systems are not described in detail in this solution. It should be noted that although the compression-shear equipment is an existing equipment and has the function of the left and right displacement of the actuator 102, the model of the compression-shear equipment 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 double-ring flange inside and outside. The actuator 102 provides load for the electro-hydraulic servo, can send a loading signal to accurately control the actuator 102 to load the specimen, and the connected sensor feeds back the signal for closed-loop control, which can accurately control the load size and record the test data. The computer sends a loading signal to control the actuator 102 to load the specimen, and the displacement sensor and load sensor feed back the signal 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 described in detail 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 tensile bearing capacity test research of the full-scale double-ring flange inside and outside. The maximum compression load of the actuator 102 is 10000 kN, and 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 node of the flange specimen 110 to meet the load requirements of the full-scale tensile bearing capacity test of the double-ring flange inside and outside.

[0057] 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 periphery and the middle position of the box girder 106. The transverse support members 108 are horizontally connected to the vertical support pipes 107 on both sides. The lower distribution beam 109 is movably inserted 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.

[0058] Both the box girder 106 and the lower distribution beam 109 are connected to the flange specimen 110 using 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.

[0059] The vertical support pipe 107 is a square steel pipe, and a square steel plate is welded to 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.

[0060] The box girder 106 is connected to the flange specimen 110 by circumferentially arrayed M52 bolts. The lower distribution beam 109 is connected to the flange specimen 110 by circumferentially 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 bars are provided in the upper distribution beam 103, the box girder 106, and the lower distribution beam 109.

[0061] A test method for the tensile bearing capacity of a full-scale inner and outer double-ring flange includes the following steps:

[0062] 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 with 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.

[0063] Step 2: Connect and fix the box girder 106, the vertical support pipe 107, and the horizontal support member 10 eight. After determining the corresponding hoisting positions, hoist 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 with M52 bolts.

[0064] Step 3: Hoist 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 axis of symmetry and connect them. [[ID=Z0]]

[0065] Step 4: Place the upper distribution beam 103 centrally on both 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;

[0066] Step 5: After the overall installation is completed, conduct full-scale tensile bearing capacity tests on the inner and outer double-ring flanges respectively:

[0067] When conducting the full-scale tensile test on 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;

[0068] When conducting the full-scale eccentric tensile test on the inner and outer double-ring flanges, move the loading point position 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;

[0069] Step 6: Finally, according to the loading conditions of the full-scale tensile bearing capacity test of the inner and outer double-ring flanges in Step 5, apply a vertical load to the actuator 102 on the compression-shear device 101 through computer control 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 test of the inner and outer double-ring flanges.

[0070] 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 forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] 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 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.

[0072] 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 changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Loading device for full-scale tensile bearing capacity test of inner and outer double-ring flanges, characterized in that: It includes 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 transverse 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 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 transverse support members (108) are horizontally connected to the vertical support pipes (107) on both sides. The lower distribution beam (109) is movably inserted through 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). The lower distribution beam (109) is connected to the flange specimen (110) by an annular array of M52 bolts. An activity hole (1091) is provided on the lower distribution beam (109), and its size is larger than the maximum cross-sectional area of the vertical support pipe (107).

2. The loading device for the full-scale tensile bearing capacity test of the inner and outer double-ring flanges according to claim 1, wherein: Both the support column A (104) and the support column B (105) are concrete-filled steel tubular columns.

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

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

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

6. The loading device for the full-scale tensile bearing capacity test of the inner and outer double-ring flanges according to claim 1, wherein: The vertical support pipes (107) are fixedly welded in an array along the perimeter of the box girder (106).

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

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

9. A method for a loading device according to any one of claims 1-8, characterized in that: It includes the following steps: Step 1: First, place the lower distribution beam (109) on the horizontal ground, and the lower end of the flange specimen (110) is fixedly connected 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-sectional area of the vertical support pipe (107), and the lower distribution beam (109) can vertically move up and down on the vertical support pipe (107). Step 2: Connect and fix the box girder (106), the vertical support pipes (107), and the transverse support members (108). After determining the corresponding hoisting positions, lift the box girder (106) and insert it through the activity hole (1091) position of the lower distribution beam (109) by aligning with the vertical support pipe (107). After landing, the upper end of the flange specimen (110) is connected 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 axis of symmetry 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 center position of the upper surface of the upper distribution beam (103); Step 5: After the overall installation is completed, conduct the full-scale internal and external double-ring flange tensile bearing capacity tests respectively: When conducting the full-scale internal and external double-ring flange axial tension 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 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 (103) according to the required eccentricity of the test. At this time, the horizontal distances of the support column A (104) and the support column B (105) 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 the vertical load through the actuator (102) on the compression-shear equipment (101) controlled by the computer until the flange specimen (110) is damaged, and record the load and displacement data during the test through the sensor to complete the full-scale internal and external double-ring flange tensile bearing capacity test.

Images