Overhanging steel beam and pull rod seismic buffering type node connection structure

Abstract

The application discloses a kind of overhanging steel beam and pull rod anti-seismic buffer type node connection structure, it is related to steel structure connecting piece technical field, including the hinged seat of connecting overhanging steel beam, hinged seat is rotatably connected with connecting cylinder, sliding member is slidably arranged in connecting cylinder, the upper surface of connecting cylinder is rotatably installed with spring plate, the top end of spring plate is bent into elbow portion in connecting cylinder, sliding member abuts elbow portion, elbow portion exerts elastic pressure to sliding member in the direction of hinged seat, the arc portion and recess portion are adapted to abut, the stable connection between pull rod piece, connecting cylinder, hinged seat is achieved, by sliding member pressing elbow portion deformation, sliding member and pull rod piece have certain activity amplitude in length direction, by arc portion and recess portion pressing deformation, connecting cylinder has certain torsional activity amplitude relative to hinged seat, overall realization relieves the stress generated at node position due to vibration, guarantee the connection stability of node position.

Description

Technical Field

[0001] This invention relates to the field of steel structure connectors, and in particular to a seismic buffer type node connection structure between a cantilevered steel beam and a tie rod. Background Technology

[0002] As an extension structure of steel structure buildings, cantilever steel beams need to ensure the stability and load-bearing strength of their connection with the main building frame. After the cantilever steel beams are fixed to the main building frame, tie rods are installed to connect the cantilever steel beams to the main building frame, forming a triangular connection structure.

[0003] Currently, tie rods and cantilever steel beams are mostly connected by rigid methods such as welding and bolts. The load is transferred through rigid constraints between components. Although this can ensure the bearing capacity and structural stiffness during normal use, the rigid connection nodes cannot adapt to the structural vibration deformation caused by the vibration of the steel structure. This can easily lead to severe stress concentration at the connection points, resulting in weld cracking, bolt shearing, or buckling failure of the connection plate, which in turn can cause tie rod failure and cantilever beam instability. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a seismic buffering node connection structure for cantilever steel beams and tie rods, which solves the problem that rigid connections between cantilever steel beams and tie rods cannot alleviate vibrations in steel structures and easily cause stress concentration at the connection nodes, leading to node damage.

[0005] To address the problems of the prior art, the technical solution of the present invention is as follows: A seismic buffering node connection structure for a cantilever steel beam and a tie rod includes a hinged seat connecting the cantilever steel beam, a connecting cylinder rotatably connected to the hinged seat, a sliding member slidably disposed inside the connecting cylinder, a spring plate rotatably mounted on the upper surface of the connecting cylinder, the top end of the spring plate bending inward into the connecting cylinder to form a bend, the sliding member abutting against the bend, the bend applying elastic pressure to the sliding member in the direction of the hinged seat, the bottom end of the tie rod connecting to the sliding member, the bottom end of the spring plate bending to form an arc-shaped portion, and the surface of the hinged seat having a recess, the arc-shaped portion fitting and abutting against the recess.

[0006] Preferably, a thickened plate is superimposed and welded to the middle of the spring plate, and the middle of the spring plate is rotatably connected to the connecting cylinder, which effectively prevents deformation of the hinge part of the spring plate, ensures the precise positional relationship of the arc-shaped part and the bend at both ends of the spring plate, and the stable interlocking elastic system of the component.

[0007] Preferably, the hinge seat includes a base plate, two upright plates are symmetrically welded to the surface of the base plate, the connecting cylinder rotates between the two upright plates via a pin, the arc-shaped part is located at the edge of the upright plate, and each side of the base plate has an arc-shaped edge.

[0008] Preferably, the sliding component includes a slider that is adapted to slide within the connecting cylinder. A contact plate is rotatably connected to the bottom end of the lower surface of the slider. The top end of the contact plate is a free end. The bent portion extends obliquely towards the slider. A fastening screw passes through the contact plate and is threadedly connected to the slider, causing the contact plate to rotate towards the slider, thereby gradually increasing the pressure of the free end of the contact plate against the bent portion.

[0009] Preferably, the free end of the contact plate is curved, and a groove is formed through the surface of the contact plate. Multiple fastening screws are threaded through the groove and connected to the slider. The edge of the groove is chamfered, and the neck of the fastening screw has a frustum portion that is adapted to abut against the chamfer of the groove.

[0010] Preferably, the tie rod includes a straight tie rod, the bottom end of which is fixed with a sleeve, and side plates extending from both sides of the sleeve. Limiting grooves are provided on both sides of the connecting cylinder, and a connecting plate is linearly slidably arranged in the limiting groove. The side plates are attached to the outer side of the connecting plate, and the side plates, connecting plates, and slider are fixed together by multiple screws. The sleeve is slidably fitted onto the end of the connecting cylinder.

[0011] Preferably, the side plate and the connecting cylinder have corresponding positioning screw holes, and when the connecting plate abuts against the bottom of the limiting groove, the positioning screw holes on the side plate and the connecting cylinder are aligned.

[0012] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention connects the tie rod and the sliding member. The bent corner applies a pressing elastic force to the sliding member, keeping the tie rod in a taut state along its length. The arc-shaped part and the recessed part fit together to apply a limiting elastic force to the torsion of the connecting cylinder and the hinge seat, thereby achieving a stable connection between the tie rod, the connecting cylinder, and the hinge seat. The deformation of the bent corner by the sliding member allows the sliding member and the tie rod to have a certain range of movement along their length. The deformation by the arc-shaped part and the recessed part allows the connecting cylinder to have a certain range of torsional movement relative to the hinge seat. Overall, this invention alleviates the stress caused by vibration at the joint and ensures the connection stability at the joint.

[0013] 2. In this invention, the spring plate and the connecting cylinder are rotated and installed, so that the bent corner and arc-shaped parts at both ends of the spring plate form a lever motion state. Under vibration, when the arc-shaped parts and bent corners at both ends of the spring plate are deformed by pressure, they apply reverse pressure to each other to compensate for the elastic strength, forming a chain-complementary elastic system to ensure the stability of the node under vibration.

[0014] 3. The side plate and the connecting cylinder of the present invention are provided with positioning screw holes. When the fastening screw is used to tighten the contact plate to abut the corner to complete the pre-tightening installation of the node, the connecting plate abuts the bottom of the limiting slide groove, and the positioning screw holes on the side plate and the connecting cylinder are aligned. The positioning screw holes can be connected by screw threads to temporarily fix the side plate and the connecting cylinder, lock the elastic buffer state of the node, and facilitate subsequent construction between the cantilever steel beams. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the connection distribution of the cantilever beam and tie rod of the present invention.

[0016] Figure 2 This is one of the overall structural schematic diagrams of the present invention.

[0017] Figure 3 This is the second schematic diagram of the overall structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the overall disassembled structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the sliding member's pressure-bending corner structure according to the present invention.

[0020] Figure 6 This is a schematic diagram of the hinge seat structure of the present invention.

[0021] Figure 7 This is a schematic diagram of the connection structure between the touch plate and the slider of the present invention.

[0022] Figure 8 This is a schematic diagram of the fastening screw and groove abutment adaptation structure of the present invention.

[0023] Reference numerals: 1. Hinge seat; 11. Vertical plate; 12. Base plate; 13. Arc-shaped edge; 2. Connecting cylinder; 21. Limiting groove; 22. Connecting plate; 3. Sleeve; 31. Side plate; 32. Straight pull rod; 4. Spring plate; 41. Arc-shaped part; 42. Bent corner part; 5. Slider; 51. Contact plate; 52. Fastening screw; 53. Groove; 54. Frustum part; 6. Recessed part; 7. Positioning screw hole. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] A seismic buffering node connection structure for cantilever steel beams and tie rods, used for connecting the bottom of the tie rod to the cantilever steel beam, such as... Figure 1-5As shown, it includes a hinge seat 1, which is welded and fixed to the surface of the cantilever steel beam. The bottom end of the connecting cylinder 2 is rotatably connected to the hinge seat 1 via a pin. The connecting cylinder 2 has a cuboid cavity extending through the top end. A sliding member is slidably installed inside the connecting cylinder 2. A spring plate 4 is rotatably installed on the upper surface of the connecting cylinder 2 via a pin. An upper opening is opened on the upper surface of the connecting cylinder 2. The top end of the spring plate 4 is bent into the connecting cylinder 2 from the upper opening to form a bend 42. The top of the sliding member abuts against the bend 42. The bend 42 applies elastic pressure to the sliding member in the direction of the hinge seat 1. The bottom end of the spring plate 4 is bent to form an arc-shaped part 41. The surface of the hinge seat 1 has a recess 6. The arc-shaped part 41 fits and abuts against the recess 6. The top end of the tie rod is connected to the main building frame, and the bottom end of the tie rod is connected to the sliding member.

[0026] The seismic buffering principle of the joint between the cantilever steel beam and the tie rod is as follows: By applying a pressure-reducing elastic force to the sliding member through the bend 42, the sliding member is kept as close as possible to the hinge seat 1, so that the tie rod is in a taut state in the length direction. By adapting and abutting with the recessed part 6 through the arc-shaped part 41, a limiting elastic force is applied to the torsion of the connecting cylinder 2 and the hinge seat 1, thereby achieving a stable connection between the tie rod, the connecting cylinder 2, and the hinge seat 1. When the steel structure vibrates, the sliding member deforms by pressing against the bend 42, so that the sliding member and the tie rod have a certain range of movement in the length direction. By pressing and deforming with the arc-shaped part 41 and the recessed part 6, the connecting cylinder 2 has a certain range of torsional movement relative to the hinge seat 1. Overall, this relieves the stress caused by vibration at the node and ensures the connection stability of the node.

[0027] Since the spring plate 4 and the connecting cylinder 2 are rotated and installed, the bent corner 42 and arc-shaped part 41 at both ends of the spring plate 4 form a lever motion state. Under vibration, when the arc-shaped part 41 and the bent corner 42 at both ends of the spring plate 4 are deformed by pressure, they both apply reverse pressure to each other to compensate for the elastic strength and form a chain complementary elastic system to ensure the stability of the node under vibration.

[0028] like Figure 5 As shown, a thickened plate is welded to the middle of the spring plate 4. The thickened middle part of the spring plate 4 is rotatably connected to the connecting cylinder 2 through a pin, which effectively prevents the hinge part of the spring plate 4 from deforming and ensures the precise positional relationship between the arc-shaped part 41 and the bend 42 at both ends of the spring plate 4, forming a stable interlocking elastic system.

[0029] like Figure 6 As shown, the hinge seat 1 includes a base plate 12, two vertical plates 11 are symmetrically welded to the surface of the base plate 12, the connecting cylinder 2 rotates between the two vertical plates 11 via a pin, the arc-shaped part 41 is located at the edge of the vertical plate 11, and each side of the base plate 12 has an arc-shaped edge 13 for extending the welding length between the base plate 12 and the cantilever steel beam.

[0030] The connection between the tie rod and the sliding member is as follows: like Figure 3 , Figure 5 As shown, the sliding component includes a slider 5, which is adapted to slide inside the connecting cylinder 2. A contact plate 51 is rotatably connected to the bottom end of the lower surface of the slider 5. The top end of the contact plate 51 is a free end. The bottom of the connecting cylinder 2 has a corresponding lower opening for the contact plate 51. The bent part 42 extends obliquely towards the slider 5. A fastening screw 52 passes through the contact plate 51 and is threadedly connected to the slider 5, causing the contact plate 51 to rotate towards the slider 5, so that the force of the free end of the contact plate 51 pressing against the bent part 42 gradually increases.

[0031] like Figure 4 As shown, the tie rod includes a straight tie rod 32, with a housing 3 fixed to the bottom end of the straight tie rod 32. Side plates 31 extend from both sides of the housing 3. Limiting grooves 21 are opened on both sides of the connecting cylinder 2. A connecting plate 22 is linearly slidably arranged in the limiting grooves 21. The side plates 31 are attached to the outside of the connecting plate 22. The side plates 31, the connecting plate 22 and the slider 5 are fixed together by multiple screws.

[0032] In the initial stage of installing the tie rod, the contact plate 51 does not contact the bend 42, and the slider 5 is not elastically compressed. It can be limited by sliding within the limiting groove 21 through the connecting plate 22. The slider 5 slides upward, which facilitates the fixing of the side plate 31, the connecting plate 22, and the slider 5 with screws. After fixing the side plate 31, the connecting plate 22, and the slider 5 into one unit, the fastening screw 52 is used to thread the contact plate 51 and the slider 5. As the fastening screw 52 is tightened, the contact plate 51 gradually moves closer to the slider 5. As the free end of the contact plate 51 gradually presses against the bend 42, the contact plate 51, in contact with the bend 42, pushes back against the bottom of the limiting slide groove 21, causing the pull rod to reach its maximum tightening state. The fastening screw 52 is continuously tightened, increasing the expected force of the contact plate 51 against the bend 42 until the pre-tightening force enables the pull rod, connecting cylinder 2, and hinge seat 1 to achieve the set connection rigidity, thus completing the connection between the pull rod and the sliding member, and adjusting the anti-vibration pre-tightening force.

[0033] like Figure 7 , Figure 8 As shown, a groove 53 is formed through the surface of the contact plate 51. Multiple fastening screws 52 are threaded through the groove 53 and connected to the slider 5 to improve the tension strength of the contact plate 51. The edge of the groove 53 is chamfered. The neck of the fastening screw 52 has a frustum 54. The frustum 54 is adapted to press against the chamfer of the groove 53, so that the fastening screw 52 can stably press against the contact plate 51 in the direction of the slider 5.

[0034] The free end of the contact plate 51 is curved, so that the contact plate 51 can stably press against the inclined bend 42 during rotation.

[0035] The sleeve 3 is slidably sleeved on the end of the connecting cylinder 2 to improve the stability of the linear connection between the tie rod and the connecting cylinder 2.

[0036] like Figure 2-5 As shown, the side plate 31 and the connecting cylinder 2 have corresponding positioning screw holes 7. When the fastening screw 52 is used to tighten the contact plate 51 to abut the bend 42 to complete the pre-tightening installation of the node, the connecting plate 22 abuts the bottom of the limiting slide groove 21, and the positioning screw holes 7 on the surface of the side plate 31 and the connecting cylinder 2 are aligned. The positioning screw holes 7 can be connected by screw threads to temporarily fix the side plate 31 and the connecting cylinder 2, locking the elastic buffer state of the node, which facilitates the subsequent construction of the cantilever steel beams such as adding covers and horizontal connections. After the entire cantilever steel structure is completed, the screws connecting the positioning screw holes 7 are removed, so that the nodes of the cantilever steel beam and the tie rod are restored to the elastic buffer state.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A seismic buffer type node connection structure for a cantilever steel beam and a tie rod, comprising a hinged seat (1) connecting the cantilever steel beam, wherein a connecting cylinder (2) is rotatably connected to the hinged seat (1), characterized in that, A sliding member is slidably disposed inside the connecting cylinder (2). A spring plate (4) is rotatably mounted on the upper surface of the connecting cylinder (2). The top end of the spring plate (4) is bent into the connecting cylinder (2) to form a bend (42). The sliding member abuts against the bend (42). The bend (42) applies elastic pressure to the sliding member in the direction of the hinge seat (1). The bottom end of the pull rod is connected to the sliding member. The bottom end of the spring plate (4) is bent to form an arc-shaped part (41). The surface of the hinge seat (1) has a recess (6). The arc-shaped part (41) is adapted to abut against the recess (6).

2. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 1, characterized in that, A thickened plate is welded to the middle of the spring plate (4), and the middle of the spring plate (4) is rotatably connected to the connecting cylinder (2).

3. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 1, characterized in that, The hinge seat (1) includes a base plate (12), two upright plates (11) are symmetrically welded to the surface of the base plate (12), the connecting cylinder (2) rotates between the two upright plates (11) by a pin, the arc-shaped part (41) is located at the edge of the upright plate (11), and each side of the base plate (12) has an arc-shaped edge (13).

4. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 1, characterized in that, The sliding component includes a slider (5), which is adapted to slide inside the connecting cylinder (2). The bottom end of the lower surface of the slider (5) is rotatably connected to a contact plate (51). The top end of the contact plate (51) is a free end. The bend (42) extends obliquely towards the slider (5). A fastening screw (52) is threaded through the contact plate (51) and connected to the slider (5), causing the contact plate (51) to rotate towards the slider (5), so that the force of the free end of the contact plate (51) pressing against the bend (42) gradually increases.

5. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 4, characterized in that, The free end of the contact plate (51) is curved.

6. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 4, characterized in that, The surface of the contact plate (51) is provided with a through groove (53), and multiple fastening screws (52) are threaded through the groove (53) and connected to the slider (5).

7. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 5, characterized in that, The edge of the groove (53) is chamfered, and the neck of the fastening screw (52) has a frustum (54) that is adapted to press against the chamfer of the groove (53).

8. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 4, characterized in that, The tie rod includes a straight tie rod (32), with a housing (3) fixed at the bottom end of the straight tie rod (32). Side plates (31) extend from both sides of the housing (3). Limiting grooves (21) are opened on both sides of the connecting cylinder (2). A connecting plate (22) is linearly slidably arranged in the limiting groove (21). The side plate (31) is attached to the outside of the connecting plate (22). The side plate (31), the connecting plate (22) and the slider (5) are fixed together by multiple screws.

9. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 8, characterized in that, The sleeve (3) is slidably sleeved on the end of the connecting cylinder (2).

10. The cantilever steel beam and tie rod seismic buffer type node connection structure according to claim 8, characterized in that, The side plate (31) and the connecting cylinder (2) are respectively provided with positioning screw holes (7). When the connecting plate (22) abuts against the bottom of the limiting slide groove (21), the positioning screw holes (7) on the surface of the side plate (31) and the connecting cylinder (2) are aligned.

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