Downward-hanging two-force-rod connecting joint

Abstract

The invention discloses a connecting node of a lower hoisting two-force rod, and relates to the field of constructional engineering, the connecting node comprises the lower hoisting two-force rod, the upper end of the lower hoisting two-force rod is connected with a main body structure, the lower end of the lower hoisting two-force rod is connected with a lower hoisting plate, and the lower hoisting plate is suspended below the main body structure through a plurality of lower hoisting two-force rods; the lower lifting two-force rod is sequentially provided with two hinged joints in the direction from the lower side joint of the main body structure to the upper side joint of the lower lifting plate, and the two hinged joints can rotate in any direction within a certain angle range. The bending-shear connection between the reinforced concrete lower hanger plate and the main body structure is eliminated, and the lower hanger plate and the main body structure do not form an integral bending-resistant stress mode no matter under the action of vertical downward constant and live loads or under the action of vertical upward hanger plate surface loads.

Description

Technical Field

[0001] The present invention relates to the field of construction engineering, and particularly to a connection node of a suspended two-force bar. Background Art

[0002] In the current application scenarios, especially in wind tunnels with strong wind pressure, due to technological requirements, the reinforced concrete suspended slab needs to be suspended under the lower chord of the main stressed steel grid. However, in actual use, under the repeated action of dynamic forces, the reinforced concrete suspended slab will frequently be in the compression zone and tension zone of the entire structural system. Different from the combination structure of conventional reinforced concrete and steel that utilizes the compression of reinforced concrete and the tension of steel, the reinforced concrete suspended slab is frequently in the tension zone, and the tensile stress level is relatively high. It is difficult to control the generation and expansion of cracks, and it is difficult to estimate the adverse effects on the process. Moreover, there are great potential safety hazards. Therefore, it is necessary to "separate" the reinforced concrete suspended slab from the main structure and not participate in the overall force-bearing, but only serve as an internal enclosure structure. Summary of the Invention

[0003] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a connection node of a suspended two-force bar. By adopting this solution, the flexural-shear connection between the reinforced concrete suspended slab and the main structure is eliminated. Whether under the action of vertical downward dead and live loads or vertical upward suspended slab surface loads, the suspended slab does not form an overall flexural force-bearing mode with the main structure.

[0004] The present invention is achieved by the following technical solutions: A connection node of a suspended two-force bar, comprising: A suspended two-force bar, the upper end of the suspended two-force bar is connected to the main structure, the lower end of the suspended two-force bar is connected to the suspended slab, and the suspended slab is suspended under the main structure by a plurality of suspended two-force bars; The suspended two-force bar is successively provided with two hinge nodes in the direction from the lower side node of the main structure to the upper side node of the suspended slab, and both hinge nodes can rotate in any direction within a certain angle range.

[0005] Compared with the prior art, under the repeated action of dynamic forces, the suspended slab will frequently be in the compression zone and tension zone of the entire structural system. Different from the combination structure of conventional reinforced concrete and steel that utilizes the compression of reinforced concrete and the tension of steel, the reinforced concrete suspended slab is frequently in the tension zone, and the tensile stress level is relatively high. It is difficult to control the generation and expansion of cracks, and it is difficult to estimate the adverse effects on the process. Moreover, there are great potential safety hazards. The present invention provides a connection node of a suspended two-force bar. By adopting this solution, the flexural-shear connection between the reinforced concrete suspended slab and the main structure is eliminated. Whether under the action of vertical downward dead and live loads or vertical upward suspended slab surface loads, the suspended slab does not form an overall flexural force-bearing mode with the main structure.

[0006] In a specific solution, a number of lower suspension two-force bars are provided between the main structure and the lower suspension plate. The upper ends of the lower suspension two-force bars are connected to the lower-side nodes of the main structure, that is, the lower chord spherical nodes, and the lower ends of the lower suspension two-force bars are connected to the upper-side nodes of the lower suspension plate, thereby completing the suspension of the lower suspension plate. Among them, two hinge joints are provided in the lower suspension two-force bars, thereby eliminating the flexural-shear connection between the lower suspension plate and the main structure. In this way, under the action of the load, the lower suspension plate can swing laterally through the hinge joints, and whether under the action of vertical downward dead and live loads or vertical upward load on the lower suspension plate surface, the lower suspension plate does not form an overall bending stress-bearing mode with the main structure, that is, no large tensile and compressive stresses in the plane of the lower suspension plate surface will be generated.

[0007] In addition, the end of the main structure is supported by the lower support structure, and spring dampers are provided between the side surface of the lower suspension plate and the lower support structure. This spring damper has a certain elastic stiffness constant and at the same time has a viscous damping characteristic. The constant elastic stiffness is used to resist the horizontal component of the surface load borne by the suspension plate, and the viscous damping is used to provide damping force to resist the earthquake action under the action of the earthquake.

[0008] Furthermore, as a specific structure of the lower suspension two-force bar, the lower suspension two-force bar includes a first ear plate, a second ear plate and an intermediate ear plate. The upper end of the first ear plate is fixed to the lower-side node of the main structure; the lower end of the second ear plate is fixed to the upper-side node of the lower suspension plate; Both ends of the intermediate ear plate are respectively hinged to the first ear plate and the second ear plate.

[0009] Furthermore, both the first ear plate and the second ear plate include two parallel ear plates. A rivet pin is horizontally arranged between the two parallel ear plates of the first ear plate and between the two parallel ear plates of the second ear plate; a bearing is coaxially sleeved on the rivet pin, and the bearing is located between the two parallel ear plates; The upper end and the lower end of the intermediate ear plate are respectively sleeved on the upper and lower bearings. In this solution, both the first ear plate and the second ear plate are double ear plates, both including two parallel ear plates. Stiffening plates perpendicular to themselves are also provided on the outer sides of the two parallel ear plates to improve the stiffness; on the two parallel ear plates, a rivet pin is fixedly penetrated, and the two parallel ear plates are connected by the rivet pin; a bearing is also coaxially sleeved on the rivet pin, and the bearing is fixed on the rivet pin; the end of the intermediate ear plate is fixedly sleeved on the outer side of the bearing. In this way, two hinge joints can be formed through the upper and lower bearings to achieve an ideal hinge constraint, thereby ideally eliminating the flexural-shear connection between the lower suspension plate and the main structure.

[0010] Furthermore, since dynamic loads are applied at the hinge position, to prevent the pin from falling off, both ends of the blind rivet pin pass through two parallel ear plates respectively; a pin cap is fixedly sleeved at one end of the blind rivet pin, and a cover plate is fixedly sleeved at the other end of the blind rivet pin.

[0011] Furthermore, between the ear plate close to the cover plate and the cover plate, a number of disc springs sleeved on the blind rivet pin are provided, and the cover plate is used to press a number of the disc springs against the ear plate. In this solution, a pin cap and a cover plate are respectively added at both ends of the blind rivet pin to achieve clamping in opposite directions. The pin cap and the pin rod are cast as one body, and the cover plate can be fixed to the blind rivet pin by threads, which is convenient for disassembly and assembly and can be reused; a disc spring group can be added between the cover plate and the ear plate. After the blind rivet pin is pre-tightened, the anti-loosening effect can be achieved through the elastic force of the disc spring.

[0012] Furthermore, to improve the anti-loosening ability, the cover plate is also provided with a split pin, and the split pin sequentially passes through one side of the cover plate, the blind rivet pin and the other side of the cover plate. Among them, the split pin is preferably arranged perpendicular to the axis of the blind rivet pin and sequentially passes through both sides of the cover plate and the blind rivet pin in the middle, so as to achieve fixation and prevent the pin from falling off.

[0013] Furthermore, as another specific structure of the lower suspension two-force bar, the lower suspension two-force bar includes a third ear plate, a fourth ear plate and a steel tie rod. The upper end of the third ear plate is fixed to the lower side node of the main structure, and the lower end of the fourth ear plate is fixed to the upper side node of the lower suspension plate; Both ends of the steel tie rod are respectively hinged to the third ear plate and the fourth ear plate.

[0014] Furthermore, the lower suspension two-force bar further includes a compression sleeve. The compression sleeve is a telescopic tube, and both ends of the compression sleeve are provided with hollow hemispherical end plates, and the inner side surface of the hemispherical end plate is provided with a first slide plate; The lower end of the third ear plate and the upper end of the fourth ear plate respectively extend into the two hemispherical end plates and are in sliding contact connection with the first slide plate. In this solution, a steel tie rod is added between the upper third ear plate and the lower fourth ear plate, so that the node bears tensile loads and is hinged through pin connections; in addition, a sleeve is also arranged between the third ear plate and the fourth ear plate to bear compressive loads through the sleeve; among them, the sleeve is a telescopic tube, which consists of two large and small sleeves and can contract with each other for quick installation; after installation, the two sleeves are welded and fixed by welding to form a tension-compression separated two-force bar; hollow hemispherical end plates are respectively arranged at both ends of the sleeve, and the hemispherical end plate contacts the end of the ear plate, that is, the end of the ear plate extends into the hemispherical end plate and contacts to realize the articulated rotation of the sleeve; to enhance the sliding performance, a first slide plate is arranged between the hemispherical end plate and the ear plate, and the first slide plate can adopt a PTFE slide plate.

[0015] Furthermore, as another specific structure of the suspended two-force bar, the suspended two-force bar includes a first welded ball, a second welded ball and an intermediate bar. The upper end of the first welded ball is fixed to the lower node of the main structure through a bar, and the second welded ball is fixed to the upper node of the suspended plate through a bar; Both ends of the intermediate bar are provided with spherical covers, and the two spherical covers respectively sleeve the first welded ball and the second welded ball.

[0016] Furthermore, the spherical cover includes two hemispheres that can be spliced with each other. In this solution, a first welded ball is suspended by a bar at the lower node of the main structure, a second welded ball extends upward by a bar at the upper node of the suspended steel beam, and an intermediate bar is arranged between the first welded ball and the second welded ball. Through the spherical covers at both ends of the intermediate bar, the universal rotation of the two hinged nodes can be realized, and it can deflect in any direction within a certain angle range; PTFE sliding material is arranged between the spherical cover and the welded ball to form a universal hinge two-force bar that can rotate at any angle. For the convenience of installation, the spherical outer cover is divided into two parts, which are connected to each other through fasteners in the last step of installation; both the bar and the intermediate bar are steel pipes.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention is a connection node of a suspended two-force bar. By forming a "two-force bar" through the suspended two-force bar and two hinged nodes, the bending-shear connection between the reinforced concrete suspended plate and the main structure is eliminated. Whether under the action of vertical downward dead and live loads or vertical upward suspended plate surface loads, the suspended plate does not form an integral bending force-bearing mode with the main structure. The formed "two-force bar" can act on both ends of the bar with the two forces respectively, with opposite directions and equal magnitudes; the line of action of the force always intersects the bar and passes through the end of the bar.

[0018] 2. The connection node of the suspended two-force bar provided by the present invention adopts this solution. By designing various implementation methods of the suspended two-force bar, the application range can be improved and the adaptability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings: Figure 1 It is the front view of the suspended two-force bar in Embodiment 2 provided by the present invention; Figure 2 Side view of the lower suspension two-force bar in Embodiment 2 provided by the present invention; Figure 3 Cross-sectional view of the lower suspension two-force bar in Embodiment 2 provided by the present invention; Figure 4 Provided by the present invention Figure 3 Cross-sectional view A-A; Figure 5 Front view of the middle ear plate in Embodiment 2 provided by the present invention; Figure 6 Schematic structural diagram of the lower suspension two-force bar in Embodiment 3 provided by the present invention; Figure 7 Schematic structural diagram of the lower suspension two-force bar in Embodiment 4 provided by the present invention. Marks in the drawings and corresponding names of parts: 4 - Lower suspension two-force bar, 401 - First ear plate, 402 - Second ear plate, 403 - Middle ear plate, 404 - Rivet pin, 405 - Bearing, 406 - Pin shaft cap, 407 - Cover plate, 408 - Disc spring, 409 - Split pin, 410 - Third ear plate, 411 - Fourth ear plate, 412 - Steel tie rod, 413 - Compression sleeve, 414 - Hemispherical end plate, 415 - First welding ball, 416 - Second welding ball, 417 - Intermediate rod, 418 - Ball cover. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention.

[0021] Embodiment 1: Embodiment 1 provides a connection node of a lower suspension two-force bar, as Figures 1 - 7 shown, including: A lower suspension two-force bar 4, the upper end of the lower suspension two-force bar 4 is connected to the main structure, the lower end of the lower suspension two-force bar 4 is connected to the lower suspension plate, and the lower suspension plate is suspended below the main structure by a plurality of lower suspension two-force bars 4; The lower suspension two-force bar 4 is successively provided with two hinge joints in the direction from the lower side node of the main structure to the upper side node of the lower suspension plate, and both hinge joints can rotate in any direction within a certain angle range.

[0022] In the prior art, under the repeated action of the power, the lower suspension plate will frequently be in the compression zone and the tension zone of the entire structural system. Different from the conventional reinforced concrete and steel composite structure where the reinforced concrete is in compression and the steel is in tension, the reinforced concrete lower suspension plate is frequently in the tension zone, and the tensile stress level is relatively high. It is difficult to control the generation and expansion of cracks, and it is difficult to estimate the adverse effects on the process. Moreover, there are great potential safety hazards. The present invention provides a connection node for the lower suspension two-force bar 4. By adopting this solution, the flexural-shear connection between the reinforced concrete lower suspension plate and the main structure is eliminated. Whether under the action of the vertical downward dead and live loads or the vertical upward load on the suspension plate surface, the lower suspension plate does not form an integral flexural stress-bearing mode with the main structure.

[0023] In a specific solution, several lower suspension two-force bars 4 are provided between the main structure and the lower suspension plate. The upper end of the lower suspension two-force bar 4 is connected to the lower side node of the main structure, that is, the lower chord spherical node, and the lower end of the lower suspension two-force bar 4 is connected to the upper side node of the lower suspension plate, thereby completing the hanging of the lower suspension plate. Among them, two hinge joints are provided in the lower suspension two-force bar 4, thereby eliminating the flexural-shear connection between the lower suspension plate and the main structure. In this way, under the action of the load, the lower suspension plate can swing laterally through the hinge joints. Whether under the action of the vertical downward dead and live loads or the vertical upward load on the suspension plate surface, the lower suspension plate does not form an integral flexural stress-bearing mode with the main structure, that is, no large tensile and compressive stresses in the plane of the suspension plate will be generated.

[0024] In addition, the end of the main structure is supported by the lower support structure, and spring dampers are provided between the side of the lower suspension plate and the lower support structure. This spring damper has a certain elastic stiffness constant and at the same time has a viscous damping characteristic. The constant elastic stiffness is used to resist the horizontal component of the surface load borne by the suspension plate, and the viscous damping is used to provide damping force to resist the seismic action under the action of an earthquake.

[0025] Embodiment 2: This Embodiment 2 is further optimized on the basis of Embodiment 1. As Figures 1 - 5 shown, a specific structure of the lower suspension two-force bar 4 is provided. The lower suspension two-force bar 4 includes a first ear plate 401, a second ear plate 402, and an intermediate ear plate 403. The upper end of the first ear plate 401 is fixed to the lower side node of the main structure; the lower end of the second ear plate 402 is fixed to the upper side node of the lower suspension plate; Both ends of the intermediate ear plate 403 are hinged to the first ear plate 401 and the second ear plate 402 respectively.

[0026] Further, both the first ear plate 401 and the second ear plate 402 are double ear plates, each including two parallel ear plates. On the outer sides of the two parallel ear plates, there are also stiffening plates perpendicular to themselves to improve the stiffness. On the two parallel ear plates, a rivet pin 404 is fixedly passed through, and the two parallel ear plates are connected by the rivet pin 404. A bearing 405 is also coaxially sleeved on the rivet pin 404, and the bearing 405 is fixed on the rivet pin 404. The end of the middle ear plate 403 is fixedly sleeved on the outer side of the bearing 405. In this way, two hinge joints can be formed through the upper and lower bearings 405 to achieve an ideal hinge constraint, thereby ideally eliminating the bending-shear connection between the lower suspension plate and the main structure.

[0027] In this embodiment, since dynamic loads will be borne at the hinge position, to prevent the pin shaft from falling off, both ends of the rivet pin 404 respectively pass through the two parallel ear plates; a pin shaft cap 406 is fixedly sleeved at one end of the rivet pin 404, and a cover plate 407 is fixedly sleeved at the other end of the rivet pin 404.

[0028] In this embodiment, in this solution, a pin shaft cap 406 and a cover plate 407 are respectively added at both ends of the rivet pin 404 to achieve clamping in opposite directions. The pin shaft cap 406 is cast integrally with the pin rod, and the cover plate 407 can be fixed on the rivet pin 404 by threads, so as to be convenient for disassembly and assembly and reusable; a set of disc springs 408 can be added between the cover plate 407 and the ear plate. After the rivet pin 404 is pre-tightened, the anti-loosening effect can be achieved through the elastic force of the disc spring 408.

[0029] In this embodiment, to improve the anti-loosening ability, the cover plate 407 is also provided with an open pin 409, and the open pin 409 sequentially penetrates through one side of the cover plate 407, the rivet pin 404, and the other side of the cover plate 407. Among them, the open pin 409 is preferably arranged perpendicular to the axis of the rivet pin 404, and sequentially penetrates through both sides of the cover plate 407 and the rivet pin 404 in the middle, so as to achieve fixation and prevent the pin shaft from falling off.

[0030] Embodiment 3: This Embodiment 3 is further optimized on the basis of Embodiment 1. As Figure 6 shown, a second specific structure of the lower suspension two-force bar 4 is provided. The lower suspension two-force bar 4 includes a third ear plate 410, a fourth ear plate 411, and a steel tie rod 412. The upper end of the third ear plate 410 is fixed to the lower side node of the main structure, and the lower end of the fourth ear plate 411 is fixed to the upper side node of the lower suspension plate; Both ends of the steel tie rod 412 are respectively hinged to the third ear plate 410 and the fourth ear plate 411.

[0031] In this embodiment, the lower suspension two-force bar 4 further includes a compression sleeve 413. The compression sleeve 413 is a telescopic tube. Both ends of the compression sleeve 413 are provided with hollow hemispherical end plates 414. The inner side of the hemispherical end plate 414 is provided with a first sliding plate; The lower end of the third ear plate 410 and the upper end of the fourth ear plate 411 respectively extend into the two hemispherical end plates 414 and are in sliding contact connection with the first sliding plate. In this solution, a steel tie rod 412 is added between the upper third ear plate 410 and the lower fourth ear plate 411, so that the joint bears tensile loads and realizes hinged connection through pin shafts; in addition, a sleeve is also arranged between the third ear plate 410 and the fourth ear plate 411 to bear compressive loads through the sleeve; among them, the sleeve is a telescopic tube, which consists of two large and small sleeves and can contract with each other for easy installation; after installation, the two sleeves are welded and fixed by welding to form a tension-compression separated two-force bar; hollow hemispherical end plates 414 are respectively arranged at both ends of the sleeve, and the hemispherical end plates 414 are in contact with the end parts of the ear plates, that is, the end parts of the ear plates extend into the hemispherical end plates 414 and are in contact to realize the hinged rotation of the sleeve; to enhance the sliding performance, a first sliding plate is arranged between the hemispherical end plate 414 and the ear plate, and the first sliding plate can adopt a PTFE sliding plate.

[0032] Embodiment 4: This Embodiment 4 is further optimized on the basis of Embodiment 1. As Figure 7 shown, a third specific structure of the lower suspension two-force bar 4 is provided. The lower suspension two-force bar 4 includes a first welding ball 415, a second welding ball 416 and an intermediate rod 417. The upper end of the first welding ball 415 is fixed to the lower node of the main structure through a rod, and the second welding ball 416 is fixed to the upper node of the lower suspension plate through a rod; Both ends of the intermediate rod 417 are provided with spherical covers 418, and the two spherical covers 418 respectively sleeved the first welding ball 415 and the second welding ball 416 inside.

[0033] In this embodiment, the spherical cover 418 includes two hemispheres that can be spliced with each other. In this solution, a first welding ball 415 is suspended by a rod at the lower node of the main structure, and a second welding ball 416 extends upward by a rod at the upper node of the lower suspension steel beam. An intermediate rod 417 is arranged between the first welding ball 415 and the second welding ball 416. Through the spherical covers 418 at both ends of the intermediate rod 417, the universal rotation of the two hinged joints is realized, and it can deflect in any direction within a certain angle range; a PTFE sliding material is arranged between the spherical cover 418 and the welding ball to form a universal hinge two-force bar that can rotate at any angle. For easy installation, the spherical outer cover is divided into two parts, which are connected to each other by fasteners in the last step of installation; among them, the rod and the intermediate rod 417 are both steel pipes.

[0034] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. 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. A connection node for a suspended two-force bar, characterized in that, Comprising: A lower suspension two-force bar (4), the upper end of the lower suspension two-force bar (4) is connected to the main structure, the lower end of the lower suspension two-force bar (4) is connected to a lower suspension plate, and the lower suspension plate is suspended below the main structure by a plurality of lower suspension two-force bars (4); The lower suspension two-force bar (4) is successively provided with two hinge joints in the direction from the lower side node of the main structure to the upper side node of the lower suspension plate, and both hinge joints can rotate in any direction within a certain angle range.

2. The connecting node of the suspended two-force bar according to claim 1, wherein The lower suspension two-force bar (4) includes a first ear plate (401), a second ear plate (402) and an intermediate ear plate (403), the upper end of the first ear plate (401) is fixed to the lower side node of the main structure; the lower end of the second ear plate (402) is fixed to the upper side node of the lower suspension plate; Both ends of the intermediate ear plate (403) are respectively hinged to the first ear plate (401) and the second ear plate (402).

3. The connecting node of the lower hanging two-force bar according to claim 2, characterized in that, Both the first ear plate (401) and the second ear plate (402) include two parallel ear plates, and rivet pins (404) are horizontally arranged between the two parallel ear plates of the first ear plate (401) and between the two parallel ear plates of the second ear plate (402); bearings (405) are coaxially sleeved on the rivet pins, and the bearings (405) are located between the two parallel ear plates; Both the upper end and the lower end of the intermediate ear plate are respectively sleeved on the upper and lower two bearings (405).

4. The connecting node of the suspended two-force bar according to claim 3, characterized in that, Both ends of the rivet pin (404) respectively pass through the two parallel ear plates; a pin shaft cap (406) is fixedly sleeved at one end of the rivet pin (404), and a cover plate (407) is fixedly sleeved at the other end of the rivet pin (404).

5. The lower suspension two-force bar connection node according to claim 4, characterized in that, A plurality of disc springs (408) sleeved on the rivet pin (404) are arranged between the ear plate close to the cover plate (407) and the cover plate (407), and the cover plate (407) is used to press the plurality of disc springs (408) on the ear plate.

6. The connecting node of the lower suspended two-force rod according to claim 4, characterized in that, An opening pin (409) is also provided on the cover plate (407), and the opening pin (409) successively penetrates through one side of the cover plate (407), the rivet pin (404) and the other side of the cover plate (407).

7. The lower suspension two-force bar connection node according to claim 1, characterized in that The lower suspension two-force bar includes a third ear plate (410), a fourth ear plate (411) and a steel tie rod (412), the upper end of the third ear plate (410) is fixed to the lower side node of the main structure, and the lower end of the fourth ear plate (411) is fixed to the upper side node of the lower suspension plate; Both ends of the steel tie rod (412) are respectively hinged to the third ear plate (410) and the fourth ear plate (411).

8. The connecting node of the suspended two-force bar according to claim 7, characterized in that, The lower suspension two-force bar (4) further includes a compression sleeve (413), the compression sleeve (413) is a telescopic tube, both ends of the compression sleeve (413) are provided with hollow hemispherical end plates (414), and the inner side surface of the hemispherical end plate (414) is provided with a first sliding plate; The lower end of the third ear plate (410) and the upper end of the fourth ear plate (411) respectively extend into the two hemispherical end plates (414) and are in sliding contact connection with the first sliding plate.

9. The connecting node of the suspended two-force bar according to claim 1, characterized in that, The lower suspension two-force bar includes a first welded ball (415), a second welded ball (416) and an intermediate bar (417). The upper end of the first welded ball (415) is fixed to the lower node of the main structure through a bar, and the second welded ball (416) is fixed to the upper node of the lower suspension plate through a bar; Both ends of the intermediate bar (417) are provided with spherical covers (418), and the two spherical covers (418) respectively sleeve the first welded ball (415) and the second welded ball (416).

10. The connecting node of the hanging two-force bar according to claim 9, characterized in that, The spherical cover (418) includes two hemispheres that can be spliced with each other.

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