An assembled steel structure connecting joint imitating the suturing structure of ironie stinkbugs

Abstract

The application provides an assembled steel structure connecting joint imitating the suture structure of ironclad beetle, which comprises a steel column, a steel beam, a cantilever beam segment and a connecting plate, the cantilever beam segment is fixed on the side wall of the steel column, the steel beam is connected with the end of the cantilever beam segment away from the steel column through a suture structure connecting joint imitating the elytra of ironclad beetle, and the steel beam and the cantilever beam segment are further connected through the connecting plate. The connecting joint can be arranged in a plastic hinge zone, the steel beam and the cantilever beam segment are connected through the suture structure connecting joint imitating the elytra of ironclad beetle, a strong joint and weak beam component is formed, and damage under the action of earthquake is ensured to occur in the potential plastic hinge zone. The joint structure form of the application replaces the traditional welding and bolt, is novel in form, good in stress performance, high in assembling efficiency, small in environmental interference, reliable in construction quality and high in engineering application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering fabricated structure, in particular to a fabricated steel structure connecting joint of bionic ironclad beetle suture structure. BACKGROUND

[0002] The fabricated structure usually adopts joint assembly to realize assembly, and current beam-column joint connecting forms mainly include welding connection, bolt connection and bolt-welding mixed connection. The joint strength of the welding connection is high, but the quality of the component welding position cannot be guaranteed due to the need for on-site welding, the bearing capacity and energy dissipation capacity of the joint area are the core of the fabricated structure research, and the environment and the technical level of workers are high; the construction speed of the bolt connection joint is relatively fast, but the more the number of bolts is, the greater the additional bending moment is, and too many hole numbers will weaken the section to a certain extent, which has a certain influence on the stress performance; the joint of the bolt-welding mixed connection combines the advantages of the above two connection modes, but the construction sequence has a certain influence on the joint performance, and the initial strain generated by welding and the high temperature at the welding position inevitably cause the bending deformation of the component.

[0003] Researches have found that the ironclad beetle can bear a force 39,000 times its body weight, and the geometric shape of the suture line in the elytra and the interlayer microstructure in the structural organization enable them to exhibit excellent mechanical connection and toughness under great pressure. In view of the problems of weak bearing capacity, insufficient energy dissipation capacity and difficult construction quality guarantee of the existing fabricated beam-column joint, the structural characteristics of the ironclad beetle are improved and optimized to be applied to the connection of engineering joints, which can promote the development of the fabricated steel structure connecting joint. Therefore, it is necessary to develop a beam-column joint connecting form of bionic ironclad beetle suture structure. SUMMARY

[0004] The present application aims to provide a fabricated steel structure connecting joint of bionic ironclad beetle suture structure, which can effectively improve the bearing capacity and energy dissipation capacity of the joint and enhance the overall assembly effect.

[0005] According to one object of the present application, the present application provides a fabricated steel structure connecting joint of bionic ironclad beetle suture structure, which comprises a steel column, a steel beam, a cantilever beam segment and a connecting plate, the cantilever beam segment is fixed on the side wall of the steel column, the steel beam is connected with one end of the cantilever beam segment away from the steel column through a connecting joint of bionic ironclad beetle elytra suture structure, and the steel beam and the cantilever beam segment are further connected through the connecting plate.

[0006] Further, the cantilever beam segment is fixed on one or more side walls of the steel column.

[0007] Further, the cross section of the steel column and the steel beam is I-shaped, H-shaped or box-shaped.

[0008] Further, the cantilever beam segment comprises a first upper flange plate, a first positioning web plate and a first lower flange plate, the length of the first lower flange plate is greater than the length of the first positioning web plate, the length of the first positioning web plate is greater than the length of the first upper flange plate, and a pad plate is arranged below the first lower flange plate.

[0009] Further, the width of the pad plate is half of the width of the first lower flange plate, and the thickness of the pad plate is the same as the thickness of the first lower flange plate.

[0010] Further, the stitched structure connecting joint comprises stitched connecting blades arranged on the steel beam and the cantilever beam segment, and the stitched connecting blades are staggered on both sides of the steel beam and the cantilever beam segment.

[0011] Further, the stitched connecting blade is an elliptical structure with a short semi-axis: long semi-axis = 1:1.8, and the number of the stitched connecting blades is 4-5.

[0012] Further, the steel beam comprises a second upper flange plate, a second positioning web plate and a second lower flange plate, the length of the second upper flange plate is greater than the length of the second positioning web plate, and the length of the second upper flange plate beyond the second positioning web plate is consistent with the exposed length of the upper part of the first positioning web plate; the length of the second positioning web plate is greater than the length of the second lower flange plate, and the length of the second positioning web plate beyond the second lower flange plate is consistent with the retracted length of the lower part of the first positioning web plate.

[0013] Further, the second positioning web plate is connected with the first positioning web plate through the connecting plate, and the pad plate is connected with the second lower flange plate through a high-strength friction type bolt.

[0014] Further, a cover plate is further arranged, and the cover plate is fixed on the first upper flange plate.

[0015] The connecting node of the technical scheme can be arranged in a plastic hinge area of a beam, the steel beam and the cantilever beam segment are connected through the stitched structure connecting joint of the bionic iron beetle sheath wing, a strong node and weak beam component is formed, and damage under the action of an earthquake is ensured to occur in a potential plastic hinge area. The stitched connecting blades of the stitched structure connecting joint adopt an elliptical geometric shape, which not only makes the structure more reasonable, but also makes the stress distribution more uniform, avoids stress concentration, and can effectively improve the toughness and energy consumption capacity of the node and enhance the overall assembly effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 This is a structural schematic diagram of the steel column and cantilever beam segment according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the installation of the cantilever beam segment and the steel beam according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the geometric shape of the connecting joint of the imitation iron beetle stitching structure according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the elliptical leaf structure with stitching construction according to an embodiment of the present invention;

[0022] Figure 6 This is an exploded view of the cantilever beam segment and steel beam assembly according to an embodiment of the present invention;

[0023] Figure 7 This is an exploded view of the assembly of the cover plate and beam body according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the beam-column joint after assembly on one side of an embodiment of the present invention;

[0025] Figure 9 This is an embodiment of the present invention. Figure 8 The front view;

[0026] Figure 10 This is an embodiment of the present invention. Figure 8 Top view;

[0027] Figure 11 This is a front view of the beam-column joint after the steel column is assembled around it according to an embodiment of the present invention;

[0028] In the diagram, 1. Steel column; 2. Steel beam; 3. Cantilever beam segment; 4. Connecting plate; 5. High-strength friction bolt; 6. Cover plate; 7. First upper flange plate; 8. First positioning web plate; 9. First lower flange plate; 10. Pad plate; 11. Second upper flange plate; 12. Second positioning web plate; 13. Second lower flange plate; 14. Bolt hole. Detailed Implementation

[0029] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", and "connecting" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Embodiment 1

[0033] As Figure 1 shown, an assembly type steel structure connecting joint imitating the suture structure of ironclad beetle includes a steel column 1, a steel beam 2, a cantilever beam segment 3, a connecting plate 4, a high-strength friction type bolt 5, and a cover plate 6.

[0034] The form of the steel column 1 and the steel beam 2 is not limited, and the cross section of the steel column 1 and the steel beam 2 can be I-shaped, H-shaped, or box-shaped. In this embodiment, the steel column 1 is a square tube column and the steel beam 2 is an H-shaped steel.

[0035] The cantilever beam segment 3 is fixed on the side surface of the steel column 1 by welding in the factory, Figure 1 which shows an example of the cantilever beam segment 3 being fixed around the steel column 1. The fixed side surface can also be selected according to the actual engineering situation.

[0036] AsFigure 2 and Figure 3 As shown in the figure, the cantilever beam segment 3 specifically comprises a first upper flange plate 7, a first positioning web plate 8 and a first lower flange plate 9, wherein the first lower flange plate 9 is longer than the first positioning web plate 8, and the first positioning web plate 8 is longer than the first upper flange plate 7. A pad plate 10 is arranged below the first lower flange plate 9, the pad plate 10 is arranged directly below the first lower flange plate 9, and the pad plate 10 forms a lap platform to facilitate the positioning and installation of the steel beam 2. The width of the pad plate 10 is half of the width of the first lower flange plate 9, the thickness of the pad plate 10 is the same as that of the first lower flange plate 9, and the pad plate 10 is symmetrically distributed on both sides of the joint with the first lower flange plate 9.

[0037] As shown in the figure, Figure 4 In the present application, the joint between the cantilever beam segment 3 and the steel beam 2 adopts a sutured structure connecting joint with the sheath wings of the bionic iron beetle. The flange ends of the free ends of the steel beam 2 and the cantilever beam segment 3 adopt a sutured connecting blade structure, and the steel beam 2 and the cantilever beam segment 3 are staggered on both sides to facilitate the socket installation.

[0038] As shown in the figure, Figure 5 The sutured structure connecting joint is in the shape of an elliptical blade, specifically, the sutured structure connecting joint is in the shape of an elliptical structure with a blade short semi-axis:long semi-axis = 1:1.8, the number of blades is 4-5, and the included angle between the centers of the two mutually socketed ellipses is 25°. The geometric shape is cast by a professional mold in the factory.

[0039] As shown in the figure, Figure 3 The steel beam 2 comprises a second upper flange plate 11, a second positioning web plate 12 and a second lower flange plate 13, the second upper flange plate 11 is longer than the second positioning web plate, and the length of the second upper flange plate 11 beyond the second positioning web plate is consistent with the exposed length of the upper part of the first positioning web plate 8 of the cantilever beam segment 3; the second positioning web plate is longer than the second lower flange plate 13, and the length of the second positioning web plate beyond the second lower flange plate 13 is consistent with the retracted length of the lower part of the first positioning web plate 8 of the cantilever beam segment 3.

[0040] When the steel beam 2 and the cantilever beam segment 3 are assembled, the upper and lower flange plates of the steel beam 2 and the cantilever beam segment 3 are connected in a socketed manner by using a sutured connection form, and then the second positioning web plate 12 of the steel beam 2 and the first positioning web plate 8 of the cantilever beam segment 3 are spliced by using a connecting plate 4 through high-strength friction type bolts 5. After the steel beam 2 and the cantilever beam segment 3 are spliced, the pad plate 10 and the second lower flange plate 13 of the steel beam 2 are connected by using the reserved bolt holes through high-strength friction type bolts.

[0041] Specifically, the second upper flange plate 11 of the steel beam 2 is first hoisted at the first positioning web plate 8 of the cantilever beam segment 3, and after the two sides of the joint connection are connected and positioned, the second upper flange plate 11 and the second lower flange plate 13 of the steel beam 2 are respectively connected and stitched with the first upper flange plate 7 and the first lower flange plate 9 of the cantilever beam segment 3, and after completion, the second lower flange plate 13 of the steel beam 2 is in full contact with the gusset plate 10.

[0042] Then, as shown in Figure 6 , a plurality of bolt holes 14 are arranged on the second positioning web plate 12 of the steel beam 2 and the first positioning web plate 8 of the cantilever beam segment 3, and corresponding through holes are arranged on the connecting plate 4, and the first positioning web plate 8 of the cantilever beam segment 3 and the second positioning web plate 12 of the steel beam 2 are spliced by the high-strength friction type bolt 5.

[0043] After the beam body is assembled, as shown in Figure 7 , the prefabricated cover plate 6 is hoisted at the bolt hole 14 reserved on the first upper flange plate 7 of the cantilever beam segment, and the cover plate 6 is connected with the assembled beam body by the high-strength friction type bolt 5. The thickness and length of the cover plate 6 can be valued according to actual requirements. The actual example after assembly is shown in Figure 8- Figure 11 .

[0044] The present application is also applicable to the beam connection of the fabricated concrete structure, that is, the I-shaped or H-shaped joint is pre-buried at the reinforced concrete cantilever beam segment and the end of the prefabricated reinforced concrete beam. The form of the present application is also applicable to the connection between columns. The application has a wide range of applications and can be used for steel structure beam-column joint connection and fabricated concrete structure beam-column joint connection. The connection joint can be arranged in the plastic hinge zone of the beam, the web plate bears the shear force, and the upper and lower flange plates bear the axial force, forming a "strong joint and weak beam component", which ensures that the damage occurs in the potential plastic hinge zone under the action of the earthquake. The lower flange gusset plate limits the possible displacement deviation when the connection joint is overlapped, increases the stability and reliability during assembly, and fully utilizes the overlapping part of the two components to participate in the stress, avoiding stress lag.

[0045] In the present application, the stitching connection blade adopts an elliptical geometric shape, which is more reasonable than the triangular and hemispherical structures commonly seen in other terrestrial insects, and the stress distribution is more uniform, avoiding stress concentration and having higher strength and toughness. When the number of stitching blades is 4-5, the overall evaluation of the peak load, stiffness and toughness at the joint is optimal, which can effectively improve the energy dissipation capacity of the joint and enhance the overall assembly effect.

[0046] The present application adopts the assembly mode of flange plate stitching connection and web plate bolt connection, the number of bolt connections is small, there is no welding, the on-site installation operation is moderate, the quality of the component can be effectively guaranteed, the construction speed is fast, and the component is convenient to disassemble and reuse, so that the present application has a broad application prospect in temporary building construction.

[0047] The cover plate added after the assembly of the beam body not only makes up the loss of the strength of the spliced part, but also limits the out-of-plane deformation of the flange plate of the spliced part of the assembled beam under stress. In addition, the cover plate splicing joint and the beam body splicing joint are staggered to realize phased stress. When the spliced part is stressed, the cover plate is first stressed, and if the cover plate deforms plastically but does not deform the beam body, the repair of the component can be completed by replacing the cover plate, and the maintenance is convenient and fast.

[0048] The bolt hole reserved by the application is slightly larger than the diameter of the high-strength friction bolt, which not only facilitates on-site installation, but also enables the component to slightly move within a controllable range under stress, thereby realizing energy consumption.

[0049] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A prefabricated steel structure connection node with a biomimetic iron beetle stitched structure, characterized in that, The system includes a steel column, a steel beam, a cantilever beam segment, and a connecting plate. The cantilever beam segment is fixed to the side wall of the steel column. The free ends of the steel beam and the cantilever beam segment have a stitched-connecting blade structure. The end of the steel beam and the end of the cantilever beam segment away from the steel column is connected by a stitched joint resembling the elytra of a biomimetic iron beetle. The steel beam and the cantilever beam segment are also connected by the connecting plate. The cantilever beam segment includes a first upper flange, a first positioning web, and a first lower flange. The length of the first lower flange is greater than that of the steel column. The length of the first positioning web is greater than the length of the first upper flange plate, and a pad is provided below the first lower flange plate; the stitched structure connection joint includes stitched connecting blades disposed on the steel beam and the cantilever beam segment, the stitched connecting blades being staggered on both sides of the steel beam and the cantilever beam segment; the stitched connecting blades are elliptical structures with a minor semi-axis: major semi-axis = 1:1.8, and the number of stitched connecting blades is 4 to 5; the included angle between the centers of the two ellipses into which the blades interlock is 25°.

2. The prefabricated steel structure connection node with the biomimetic iron beetle stitching structure according to claim 1, characterized in that, The cantilever beam segment is fixed to one or more side walls of the steel column.

3. The prefabricated steel structure connection node with the biomimetic iron beetle stitched structure according to claim 1, characterized in that, The cross-sections of the steel columns and steel beams are I-shaped, H-shaped, or box-shaped.

4. The prefabricated steel structure connection node with the biomimetic iron beetle stitching structure according to claim 1, characterized in that, The width of the pad is half the width of the first lower flange plate, and the thickness of the pad is the same as the thickness of the first lower flange plate.

5. The prefabricated steel structure connection node with the biomimetic iron beetle stitching structure according to claim 4, characterized in that, The steel beam includes a second upper flange plate, a second positioning web plate, and a second lower flange plate. The length of the second upper flange plate is greater than the length of the second positioning web plate, and the length of the second upper flange plate extending beyond the second positioning web plate is the same as the exposed length of the upper part of the first positioning web plate. The length of the second positioning web plate is greater than the length of the second lower flange plate, and the length of the second positioning web plate extending beyond the second lower flange plate is the same as the inward length of the lower part of the first positioning web plate.

6. The prefabricated steel structure connection node with the biomimetic iron beetle stitching structure according to claim 5, characterized in that, The second positioning web plate is connected to the first positioning web plate through the connecting plate, and the pad plate is connected to the second lower flange plate through high-strength friction bolts.

7. The prefabricated steel structure connection node with the biomimetic iron beetle stitched structure according to claim 6, characterized in that, It also includes a cover plate, which is fixed to the first upper flange plate.

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