Equivalent structure, test device and installation method of tension diagonal riveted node

Abstract

The present invention discloses an equivalent structure of a riveted node of a tension diagonal web member, a test device and an installation method, which relate to the technical field of steel truss bridges, and include a first base, a local node plate, an equivalent thick plate and a second base, wherein one end cover of the local node plate is arranged on the upper side of one end of the first base, the left edge of the local node plate is fixedly connected to the first base by a fillet weld, the other end cover of the local node plate is arranged on the upper side of one end of the equivalent thick plate, the other end of the equivalent thick plate is connected to the second base, and a plurality of full-size rivets are arranged at the overlapped parts of the local node plate, the first base and the equivalent thick plate. The equivalent structure of the riveted node of a tension diagonal web member of the present invention can effectively simulate the stress condition of the original node, and the failure form is basically unaffected. By simplifying the structure, the loading tonnage required for the test is effectively reduced, the test cost is saved, and the first base and the second base are easy to load.

Description

Technical Field

[0001] The invention relates to the technical field of steel truss bridges, and in particular to an equivalent structure of a tension diagonal member riveted node, a test device and an installation method. Background Art

[0002] When studying the nodes of riveted steel truss bridges, on the one hand, the node size of the original structure is very large, and a full-scale complete node model will require a set of specially large multi-point loading test equipment to be customized for testing. On the other hand, due to the limitations of hot-heading rivet production and construction conditions, it is difficult to scale down the nodes of the original structure. Therefore, it is necessary to intercept the original nodes for research.

[0003] like Figure 1a As shown in the figure, the original node includes the first upper chord C, the second upper chord D, the compression diagonal member E, the tension diagonal member F, the vertical member G and two node plates A. The first upper chord C, the second upper chord D, the compression diagonal member E, the tension diagonal member F and the vertical member G are all I-shaped structures. The two node plates A are respectively covered on both sides of the first upper chord C, the second upper chord D, the compression diagonal member E, the tension diagonal member F and the vertical member G. The node plate A is connected to the flange plates of the first upper chord C, the second upper chord D, the compression diagonal member E, the tension diagonal member F and the vertical member G through rivets B. It can be seen from the force analysis that the structural characteristics and internal forces of the compression diagonal member E and the tension diagonal member F are the most important factors determining the node failure form. At the same time, due to the structural symmetry of the original node and the antisymmetry of the internal forces of the compression diagonal member E and the tension diagonal member F, the original node can be split into two parts along the symmetry axis for separate analysis, one is the side of the compression diagonal member E, and the other is the side of the tension diagonal member F, while the failure form of the node is basically unaffected.

[0004] like Figure 1b As shown, for the node on the side of the tension diagonal member F, the midline of the upper chord D and the vertical member G is taken as the boundary, and the local structure of the node on the side of the tension diagonal member F is taken out as the research object, which is called the node local structure prototype T.

[0005] On the one hand, the intercepted node local structure prototype T contains some idealized boundary conditions and cannot be directly used in experiments in reality. On the other hand, loading the overall structure of the node local structure prototype T requires test equipment with a higher loading tonnage, and it is usually difficult to find matching loading equipment. Therefore, there is an urgent need for an equivalent specimen of the node local structure prototype T with a lower loading tonnage requirement and easy loading. Summary of the invention

[0006] The purpose of the present invention is to provide an equivalent structure, a test device and an installation method for a tension diagonal member riveted node, which simplifies the node specimen and effectively reduces the loading tonnage required for the test while ensuring that the test results are basically not affected.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides an equivalent structure of a riveted node of a tensioned diagonal web member, comprising a first base, a local node plate, an equivalent thick plate and a second base, wherein one end cover of the local node plate is arranged on the upper side of one end of the first base, the left edge of the local node plate is fixedly connected to the first base by a fillet weld, the other end cover of the local node plate is arranged on the upper side of one end of the equivalent thick plate, the other end of the equivalent thick plate is connected to the second base, and a plurality of full-size rivets are arranged at the overlapping positions of the local node plate, the first base and the equivalent thick plate.

[0009] Preferably, the first base includes a first middle panel, the shape of the right edge of the first middle panel is the same as the contour envelope shape of the second upper chord and the vertical web in the node local structure prototype, a first supporting ear block is arranged on both sides of the first middle panel, two opposite first stiffening ribs are arranged on both sides of the first middle panel, the first middle panel is arranged perpendicular to the two first stiffening ribs, one end of the two first stiffening ribs is arranged with an end stiffening rib, and a plurality of second stiffening ribs are arranged on both sides of each of the first supporting ear blocks;

[0010] The second base includes a second middle panel, and a second supporting ear block is disposed on two side surfaces of the second middle panel.

[0011] Preferably, the first supporting ear block and the second supporting ear block have the same structure, and both the first supporting ear block and the second supporting ear block include a supporting panel, a supporting bottom plate and a plurality of supporting stiffening plates, the supporting panel is vertically arranged to the first middle panel or the second middle panel, the plurality of supporting stiffening plates of the first supporting ear block are vertically arranged to the first middle panel, the plurality of supporting stiffening plates of the second supporting ear block are vertically arranged to the second middle panel, the plurality of supporting stiffening plates are all arranged in parallel along the loading direction, and the supporting bottom plate is arranged on the plurality of supporting stiffening plates and is parallel to the first middle panel or the second middle panel.

[0012] Preferably, the size and shape of the local node plate are the same as those of the node plate in the local structure prototype of the node; the size and distribution form of the full-size rivets are the same as those of the rivets in the local structure prototype of the node, and the number of the full-size rivets is half of the rivets in the local structure prototype of the node.

[0013] Preferably, the equivalent thick plate includes an equivalent plate and an extension plate formed integrally, the cross-sectional width of the equivalent plate is the same as the flange plate width of the tension diagonal member of the local structural prototype of the node, the cross-sectional area of ​​the equivalent plate is half of the cross-sectional area of ​​the tension diagonal member of the local structural prototype of the node, and the extension plate is connected to the second base.

[0014] Preferably, the fillet weld is arranged along a cut boundary of a local structural prototype of the node.

[0015] The present invention also provides a test device for the equivalent structure of the riveted node of the tension diagonal member, comprising two supporting columns and two jacks, one end of the supporting column is connected to the first base, one end of the jack is connected to the second base, the supporting column and the jack are arranged opposite to each other and a gap is arranged between the supporting column and the jack; the equivalent structure of the riveted node of the tension diagonal member is arranged between the ground and the ground-anchored reaction frame; round steel bars are arranged between the equivalent structure of the riveted node of the tension diagonal member and the ground and the ground-anchored reaction frame, the axis of the round steel bar is perpendicular to the loading direction, and the round steel bar rolls along the loading direction.

[0016] Preferably, the supporting column comprises a tube body, end plates are provided at both ends of the tube body, a plurality of column stiffening ribs are provided between the end plate and the tube body, a force transmission plate is provided on the end plate of the supporting column close to the jack side, and a plurality of force transmission stiffening ribs are provided between the force transmission plate and the end plate.

[0017] Preferably, the ground-anchored reaction frame comprises two groups of columns, four cross beams and one longitudinal beam, each group of the columns comprises two columns, the four columns are arranged at the four corners of a rectangle, a cross beam is arranged on both sides of the columns of each group, the cross beam is arranged perpendicular to the columns, the longitudinal beam is arranged in the middle of the four cross beams, and the longitudinal beam is parallel to the loading direction.

[0018] The present invention also provides a method for installing the test device, comprising the following steps:

[0019] Step 1: Connect one end of the support column and one end of the replacement column with bolts, then connect the other end of the support column to the support panel of the first base with bolts, and connect the other end of the replacement column to the support panel of the second base with bolts;

[0020] Step 2: Place the tension diagonal riveted node equivalent structure with the supporting column and the replacement column in step 1 into the ground-anchored reaction frame, and install the round steel rod. The installation can be performed in a bottom-up order, that is, first place the round steel rod on the ground, then place the tension diagonal riveted node equivalent structure on the round steel rod, and then place another round steel rod on the top surface of the tension diagonal riveted node equivalent structure, and then install the ground-anchored reaction frame, and the lower surface of the longitudinal beam of the ground-anchored reaction frame is just pressed on the round steel rod on the top surface of the tension diagonal riveted node equivalent structure;

[0021] Step 3: Remove the two replacement columns and replace them with two jacks. At this point, the test device is installed and a loading test is performed.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention uses a local node plate to simulate the node plate in the local structure prototype of the node, an equivalent thick plate to simulate the tension diagonal web, a first base to simulate the second upper chord and vertical web part in the local structure prototype of the node, and a fillet weld to simulate the complete node plate in the original node to constrain the extracted local node plate. The equivalent structure of the riveted node of the tension diagonal web can effectively simulate the stress condition of the original node, and its failure form is basically unaffected. By simplifying the structure, the loading tonnage required for the test is effectively reduced, saving the test cost. At the same time, the first base and the second base facilitate loading the equivalent structure of the riveted node of the tension diagonal web BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1a It is the schematic diagram of the original node;

[0026] Figure 1b A schematic diagram of the local structure prototype of the node is captured;

[0027] Figure 1c is a schematic diagram of the contour envelope;

[0028] Figure 2a It is a schematic diagram of the cross section of the tension diagonal member;

[0029] Figure 2b This is a schematic diagram of equivalent selection of tension diagonal members;

[0030] Figure 2c This is a simplified schematic diagram of the equivalent tension diagonal member;

[0031] Figure 3 It is a schematic diagram of the equivalent structure of the riveted node of the tension diagonal member of the present invention;

[0032] Figure 4 for Figure 3 A top view of

[0033] Figure 5 for Figure 4 AA section view;

[0034] Figure 6This is a disassembled diagram of the first base of the present invention;

[0035] Figure 7 This is a disassembled diagram of the second base of the present invention;

[0036] Figure 8 It is a schematic diagram of a support column of the present invention;

[0037] Fig. 9 It is a schematic diagram of the jack of the present invention;

[0038] Fig.10 It is a schematic diagram of a replacement column of the present invention;

[0039] Fig.11 It is a schematic diagram of a round steel bar of the present invention;

[0040] Fig.12 It is a schematic diagram of the ground anchor reaction frame of the present invention;

[0041] Fig.13 It is a schematic diagram of the test device of the present invention;

[0042] Fig.14 The test device of the present invention is loaded with an illustration diagram

[0043] Fig.15 This is a schematic diagram of step 1 of the test device installation method of the present invention;

[0044] Fig.16 This is a schematic diagram of step 2 of the test device installation method of the present invention;

[0045] Fig.17 This is a schematic diagram of step 3 of the test device installation method of the present invention;

[0046] Among them: A-node plate, B-rivet, C-first upper chord, D-second upper chord, E-compressive diagonal web, F-tension diagonal web, G-vertical web, T-node local structure prototype, 1-first base, 2-local node plate, 3-equivalent thick plate, 4-second base, 5-full-size rivet, 6-first stiffening rib, 7-first middle panel, 8-end stiffening rib, 9-second stiffening rib, 10-second middle panel, 11-support Bearing plate, 12-supporting bottom plate, 13-supporting stiffening plate, 14-supporting column, 15-jack, 16-tube body, 17-end plate, 18-force transfer plate, 19-column, 20-crossbeam, 21-longitudinal beam, 22-round steel rod, 23-replacement column, 24-equivalent structure of riveted node of tension diagonal web member, 25-ground anchor reaction frame, 26-riveted node specimen of tension diagonal web member, 27-fillet weld, 28-contour envelope. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The object of the present invention is to provide an equivalent structure of a tension diagonal riveted node, a test device and an installation method, which can effectively reduce the loading tonnage required for the test while ensuring that the test results are basically unaffected by simplifying the structure.

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Embodiment 1

[0051] like Figure 2a-2c As shown in the figure, due to the symmetry of the local structure prototype T of the node in the cross section, half of the cross section can be taken for research. After taking half of the structure in the cross section and reasonably equivalent it, only half of the loading tonnage is required during the test loading, which effectively reduces the loading tonnage required for the test, and the test results are almost unaffected.

[0052] like Figure 3-Figure 7 As shown: This embodiment provides an equivalent structure of a tension diagonal riveted node, comprising a first base 1, a local node plate 2, an equivalent thick plate 3 and a second base 4, wherein one end cover of the local node plate 2 is arranged on the upper side of one end of the first base 1 (with Figure 5 The left edge of the local node plate 2 (based on the placement direction of the structure) Figure 4 The other end cover of the local node plate 2 is arranged on the upper side of one end of the equivalent thick plate 3 (based on the placement direction of the structure in the middle) and is fixedly connected to the first base 1 by a fillet weld 27. Figure 5 The other end of the equivalent thick plate 3 is connected to the second base 4, and a plurality of full-size rivets 5 are arranged at the overlap of the local node plate 2, the first base 1 and the equivalent thick plate 3. The local node plate 2, the equivalent thick plate 3 and the full-size rivets 5 are the riveted node specimens 26 of the tension diagonal web members.

[0053] In this embodiment, the first base 1 includes a first middle panel 7, and the shape of the right edge of the first middle panel 7 (in Figure 5 The shape of the outline envelope 28 of the second upper chord member D and the vertical web member G in the node local structure prototype T is the same as that of the middle structure. Figure 1cAs shown, the contour envelope 28 of the second upper chord D and the vertical web G in the node local structure prototype T is composed of the coincidence line of the edge of the flange plate of the intercepted second upper chord D and the node plate A and its extension line, the coincidence line of the edge of the flange plate of the intercepted vertical web G and the node plate A and its extension line, a first supporting ear block is arranged on both sides of the first middle panel 7, two opposite first stiffening ribs 6 are arranged on both sides of the first middle panel 7, the first middle panel 7 is vertically arranged with the two first stiffening ribs 6, one end of the two first stiffening ribs 6 is arranged with an end stiffening rib 8, a plurality of second stiffening ribs 9 are arranged on both sides of each first supporting ear block, the first stiffening rib 6, the first middle panel 7, the end stiffening rib 8, the first supporting ear block, and the second stiffening rib 9 are welded as a whole, and the function of the first stiffening rib 6 and the second stiffening rib 9 is to ensure that the first base 1 has sufficiently strong and relatively uniform stiffness; the second base 4 includes a second middle panel 10, a second supporting ear block is arranged on both sides of the second middle panel 10, and the second middle panel 10 and the second supporting ear block are welded as a whole.

[0054] In this embodiment, the first supporting ear block and the second supporting ear block have the same structure. Both the first supporting ear block and the second supporting ear block include a supporting panel 11, a supporting bottom plate 12 and a plurality of supporting stiffening plates 13. The supporting panel 11, the supporting bottom plate 12 and the plurality of supporting stiffening plates 13 are welded together. Bolt holes for connection are provided on the supporting panel 11. The supporting panel 11 is vertically arranged with the first middle panel 7 or the second middle panel 10. The plurality of supporting stiffening plates 13 of the first supporting ear block are vertically arranged with the first middle panel 7. The plurality of supporting stiffening plates 13 of the second supporting ear block are vertically arranged with the second middle panel 10. The plurality of supporting stiffening plates 13 are all arranged in parallel along the loading direction. The supporting bottom plate 12 is arranged on the plurality of supporting stiffening plates 13 and is parallel to the first middle panel 7 or the second middle panel 10.

[0055] In this embodiment, the size and shape of the local node plate 2 are the same as those of the node plate in the node local structure prototype T; the size and distribution form of the full-size rivets 5 are the same as those of the rivets in the node local structure prototype T, and the number of the full-size rivets 5 is half of the rivets in the node local structure prototype T. The left edge of the local node plate 2 is fixedly connected to the first base 1 through a fillet weld 27, and the fillet weld 27 is arranged along the interception boundary of the node local structure prototype T. The fillet weld 27 should be welded continuously, and the size of the weld leg is preferably slightly smaller than the thickness of the local node plate 2.

[0056] In this embodiment, the equivalent thick plate 3 includes an integrally formed equivalent plate and an extension plate. The equivalent thick plate 3 simulates the tension diagonal member F in the node local structure prototype T. The cross-sectional width of the equivalent plate is the same as the flange plate width of the tension diagonal member F of the node local structure prototype T. The cross-sectional area of ​​the equivalent plate is half of the cross-sectional area of ​​the tension diagonal member F of the node local structure prototype T. Due to the force characteristics of the tension diagonal member F, the web of the tension diagonal member F is equivalently converted to the flange plate according to the principle of equal area, that is, the equivalent plate is equivalent to a flange plate with increased thickness. The extension plate is connected to the second base 4, specifically by a full-penetration butt weld.

[0057] The tension diagonal riveted node equivalent structure 24 of this embodiment simulates half of the structure of the node local structure prototype T. The local node plate 2 simulates the node plate in the node local structure prototype T, the equivalent thick plate 3 simulates the tension diagonal F, the first base 1 simulates the second upper chord D and the vertical web G part in the node local structure prototype T, and the fillet weld 27 simulates the constraint effect of the complete node plate in the original node on the removed local node plate 2. The tension diagonal riveted node equivalent structure 24 can effectively simulate the stress condition of the original node, and its failure form is basically unaffected. By simplifying the structure, the loading tonnage required for the test is effectively reduced, saving the test cost. At the same time, the first base 1 and the second base 4 facilitate loading the tension diagonal riveted node equivalent structure 24.

[0058] Embodiment 2

[0059] like Figure 8-Figure 14 As shown: This embodiment also provides a test device for the equivalent structure 24 of the tension diagonal web riveted node of the first embodiment, comprising two supporting columns 14 and two jacks 15, one end of the supporting column 14 is connected to the first base 1, one end of the jack 15 is connected to the second base 4, the supporting column 14 and the jack 15 are arranged opposite to each other and a gap is arranged between the supporting column 14 and the jack 15, the gap is within the travel range of the jack 15, the two jacks 15 are of the same model and can be loaded synchronously, and the equivalent structure 24 of the tension diagonal web riveted node is arranged on the ground and the anchor type reaction frame; a round steel rod 22 is arranged between the tension diagonal web riveted node equivalent structure 24 and the ground and the anchor type reaction frame, the axis of the round steel rod 22 is perpendicular to the loading direction, and the round steel rod 22 rolls along the loading direction. There are eight round steel rods 22, two of which form a group. The four groups of round steel rods 22 are respectively placed between the first base 1 and the longitudinal beam 21, between the first base 1 and the ground, between the second base 4 and the longitudinal beam 21, and between the second base 4 and the ground. The round steel rods 22 are used to reduce the friction force on the tension diagonal web riveted node equivalent structure 24 during the test.

[0060] In this embodiment, the support column 14 is a component for transferring loads. The support column 14 includes a tube body 16. End plates 17 are provided at both ends of the tube body 16. A number of column stiffening ribs are provided between the end plate 17 and the tube body 16. A force transmission plate 18 is provided on the end plate 17 of the support column 14 close to the jack 15. A number of force transmission stiffening ribs are provided between the force transmission plate 18 and the end plate 17. The tube body 16, the end plate 17, the column stiffening ribs, the force transmission plate 18 and the force transmission stiffening ribs are welded as a whole.

[0061] In this embodiment, the ground anchor reaction frame 25 includes two groups of columns 19, four cross beams 20 and a longitudinal beam 21. Each group of columns 19 has two columns. The four columns 19 are arranged at the four corners of a rectangle. A cross beam 20 is provided on both sides of each group of columns 19. The cross beam 20 is vertically arranged to the columns 19. The longitudinal beam 21 is arranged in the middle of the four cross beams 20. The longitudinal beam 21 is parallel to the loading direction. The function of the ground anchor reaction frame 25 is to ensure that the loading direction does not deflect during the test, and at the same time, it serves as a protective measure to ensure the safety of the test.

[0062] Embodiment 3

[0063] like Figure 15-17 As shown, this embodiment discloses a method for installing the test device of embodiment 2, comprising the following steps:

[0064] Step 1: If Fig.15 As shown, one end of the support column 14 with the force transmission plate 18 and one end of the replacement column 23 are connected by bolts, and then the other end of the support column 14 is connected to the support panel 11 of the first base 1 by bolts, and the other end of the replacement column 23 is connected to the support panel 11 of the second base 4 by bolts. At this time, the structure has greater rigidity and is convenient for transportation and lifting;

[0065] Step 2: If Fig.16 As shown, the tension diagonal riveted node equivalent structure 24 with the support column 14 and the replacement column 23 is placed in the ground anchor reaction frame 25, and the round steel rods 22 are installed. The installation can be carried out in a bottom-up order, that is, four round steel rods 22 are placed on the ground first, and then the tension diagonal riveted node equivalent structure 24 is placed on the round steel rods 22, and then the other four round steel rods 22 are placed on the top surface of the tension diagonal riveted node equivalent structure 24, and then the ground anchor reaction frame 25 is installed. The column 19 of the force frame 25, then determine the installation position of the cross beam 20 and the longitudinal beam 21 according to the height of the tension diagonal bar riveted node equivalent structure 24, so that the lower surface of the longitudinal beam 21 is just pressed on the round steel bar 22 on the top surface of the tension diagonal bar riveted node equivalent structure 24, and the cross beam 20 is used as a barrier protection measure at both ends of the tension diagonal bar riveted node equivalent structure 24, and sufficient test space must be left between the cross beam 20 and the tension diagonal bar riveted node equivalent structure 24;

[0066] Step 3: If Fig.17 As shown, two replacement columns 23 are removed and replaced with two jacks 15. At this point, the test device is installed and a loading test is performed.

[0067] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An equivalent structure of a tension diagonal riveted node, characterized in that: It comprises a first base, a local node plate, an equivalent thick plate and a second base, wherein one end cover of the local node plate is arranged on the upper side of one end of the first base, the left edge of the local node plate is fixedly connected to the first base through a fillet weld, the other end cover of the local node plate is arranged on the upper side of one end of the equivalent thick plate, the other end of the equivalent thick plate is connected to the second base, and a plurality of full-size rivets are arranged at the overlapped positions of the local node plate, the first base and the equivalent thick plate; The first base comprises a first middle panel, the shape of the right edge of the first middle panel is the same as the contour envelope shape of the second upper chord and the vertical web in the node local structure prototype, a first supporting ear block is arranged on both sides of the first middle panel, two opposite first stiffening ribs are arranged on both sides of the first middle panel, the first middle panel is arranged perpendicular to the two first stiffening ribs, one end of the two first stiffening ribs is arranged with an end stiffening rib, and a plurality of second stiffening ribs are arranged on both sides of each of the first supporting ear blocks; The second base comprises a second middle panel, and a second supporting ear block is arranged on two side surfaces of the second middle panel; The first supporting ear block and the second supporting ear block have the same structure. Both the first supporting ear block and the second supporting ear block include a supporting panel, a supporting bottom plate and a plurality of supporting stiffening plates. The supporting panel is arranged perpendicularly to the first middle panel or the second middle panel. The plurality of supporting stiffening plates of the first supporting ear block are arranged perpendicularly to the first middle panel. The plurality of supporting stiffening plates of the second supporting ear block are arranged perpendicularly to the second middle panel. The plurality of supporting stiffening plates are arranged parallel to the loading direction. The supporting bottom plate is arranged on the plurality of supporting stiffening plates and is parallel to the first middle panel or the second middle panel. The size and shape of the local node plate are the same as those of the node plate in the local structure prototype of the node; the size and distribution form of the full-size rivets are the same as those of the rivets in the local structure prototype of the node, and the number of the full-size rivets is half of the rivets in the local structure prototype of the node; The equivalent thick plate includes an integrally formed equivalent plate and an extension plate, the cross-sectional width of the equivalent plate is the same as the flange plate width of the tension diagonal member of the local structural prototype of the node, the cross-sectional area of ​​the equivalent plate is half of the cross-sectional area of ​​the tension diagonal member of the local structural prototype of the node, and the extension plate is connected to the second base.

2. The equivalent structure of the tension diagonal riveted node according to claim 1, characterized in that: The fillet weld is arranged along the interception boundary of the local structure prototype of the node.

3. A test device for an equivalent structure of a tension diagonal riveted node according to any one of claims 1 to 2, characterized in that: It includes two supporting columns and two jacks, one end of the supporting column is connected to the first base, one end of the jack is connected to the second base, the supporting column and the jack are arranged opposite to each other and a gap is arranged between the supporting column and the jack; the equivalent structure of the riveted node of the tension diagonal web is arranged between the ground and the anchored reaction frame; round steel bars are arranged between the equivalent structure of the riveted node of the tension diagonal web and the ground and the anchored reaction frame, the axis of the round steel bar is perpendicular to the loading direction, and the round steel bar rolls along the loading direction.

4. The test device according to claim 3, characterized in that: The supporting column includes a tube body, end plates are arranged at both ends of the tube body, a plurality of column stiffening ribs are arranged between the end plates and the tube body, a force transmission plate is arranged on the end plate of the supporting column close to the jack side, and a plurality of force transmission stiffening ribs are arranged between the force transmission plate and the end plates.

5. The test device according to claim 3, characterized in that: The ground-anchored reaction frame includes two groups of columns, four cross beams and one longitudinal beam. Each group of the columns has two columns, and the four columns are arranged at the four corners of a rectangle. A cross beam is arranged on both sides of the columns of each group, and the cross beam is arranged perpendicular to the columns. The longitudinal beam is arranged in the middle of the four cross beams, and the longitudinal beam is parallel to the loading direction.

6. A method for installing a test device as claimed in claim 3, characterized in that: The steps include: Step 1: Connect one end of the support column and one end of the replacement column with bolts, then connect the other end of the support column to the support panel of the first base with bolts, and connect the other end of the replacement column to the support panel of the second base with bolts; Step 2: Place the tension diagonal riveted node equivalent structure with the supporting column and the replacement column in step 1 into the ground-anchored reaction frame, and install the round steel rod. The installation can be performed in a bottom-up order, that is, first place the round steel rod on the ground, then place the tension diagonal riveted node equivalent structure on the round steel rod, and then place another round steel rod on the top surface of the tension diagonal riveted node equivalent structure, and then install the ground-anchored reaction frame, and the lower surface of the longitudinal beam of the ground-anchored reaction frame is just pressed on the round steel rod on the top surface of the tension diagonal riveted node equivalent structure; Step 3: Remove the two replacement columns and replace them with two jacks. At this point, the test device is installed and a loading test is performed.

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