A graded energy dissipation assembled beam hinge node

Abstract

The present invention discloses a graded energy-absorbing assembled beam hinge node, comprising at least one pair of first embedded parts and at least one pair of second embedded parts, which are respectively distributed along the connection direction of two prefabricated beams; each pair of first embedded parts is arranged at intervals from each pair of second embedded parts, and the ends on both sides are respectively used to connect the prefabricated beams; the first embedded parts and the second embedded parts adjacent to each other on the same side are connected through energy-absorbing parts, and the second embedded parts are provided with limiting holes and stranded wire reserved holes, and each pair of second embedded parts are connected through limiting pins inserted into the limiting holes and prestressed stranded wires inserted into the stranded wire reserved holes; after the graded energy-absorbing structures are combined, they cooperate with each other, and under normal use, the prestressed stranded wire bears the main force effect; when encountering accidental loads such as earthquakes or increased external loads, the second embedded parts will generate a relative rotation angle with the prefabricated beams, thereby driving the energy-absorbing parts to move, and at this time, the energy-absorbing parts generate shear deformation to dissipate seismic energy.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated building structure connection, in particular to a graded energy-dissipating prefabricated beam hinge node. Background Art

[0002] At present, the connection methods of prefabricated concrete beam nodes are divided into wet connection and dry connection. Wet connection is to connect the components into a whole by pouring concrete, while dry connection is to connect the prefabricated components into a whole by using embedded parts, prestressing, bolts or welding. Regardless of the connection method, the splicing position of the beam is designed as a rigid connection, and the external load is borne by the component itself, which is not conducive to achieving graded energy consumption.

[0003] The Chinese utility model patent document with announcement number CN216616218U discloses an open-and-close seismic-resistant and energy-absorbing assembled beam-column node, which mainly includes prefabricated beams and columns, beam-column node connecting components and prefabricated cross beams. Its defect is that steel plates are set on all four sides of the joints of the prefabricated beams. Due to the large rigidity of the node itself, the hinge mechanism is difficult to achieve, and it cannot be restored after rotation.

[0004] The Chinese invention patent document with publication number CN113047429A discloses a rotational friction energy-absorbing self-resetting assembled beam-column node, which mainly includes prefabricated columns, unbonded prestressed tendons, prefabricated column sleeves and prefabricated beam sleeves. Its defect is that the prefabricated beams and columns are connected by a tongue-and-groove structure. During normal use, the external sleeve bears a large shear force, making it difficult to realize the rotational friction mechanism.

[0005] In summary, the existing prefabricated structures are formed by splicing prefabricated components, so it is difficult to achieve the overall stability of cast-in-place components. To solve the above problems, various methods are usually used to strengthen the stiffness of the nodes to ensure that they will not be severely damaged under earthquakes. However, one-sided enhancement of node stiffness will not only cause the area to bear greater earthquake energy, but also greatly increase the project cost. Summary of the invention

[0006] The purpose of the present invention is to provide a graded energy dissipation assembled beam hinge node to solve at least one technical problem in the prior art, so that it can optimize the energy dissipation mechanism and increase structural damping through a solution with graded energy dissipation and shock absorption effects, thereby achieving better application benefits.

[0007] The hierarchical energy dissipation assembled beam hinge node provided by the present invention comprises at least one pair of first embedded parts and at least one pair of second embedded parts. Each pair of first embedded parts is distributed along the connection direction of two prefabricated beams, and the two side ends are respectively used to connect the two prefabricated beams. Each pair of second embedded parts is distributed along the connection direction of two prefabricated beams, and the two side ends are respectively used to connect the two prefabricated beams.

[0008] Each pair of first embedded parts and each pair of second embedded parts are arranged at intervals, and the first embedded parts and the second embedded parts adjacent to each other on the same side are connected via energy-absorbing parts.

[0009] The second embedded parts are provided with limiting holes and reserved holes for stranded wires, and each pair of second embedded parts are connected by limiting pins inserted into the limiting holes and prestressed stranded wires inserted into the reserved holes for stranded wires.

[0010] The hierarchical energy-absorbing assembled beam hinge node has two ends of each pair of embedded parts respectively used to connect two prefabricated beams, and the two prefabricated beams are usually of the same structure. The tie-joint connection structure of the prestressed strands connected between each pair of second embedded parts constitutes a primary energy-absorbing structure; the energy-absorbing parts are connected between the first embedded parts and the second embedded parts, which also constitute a primary energy-absorbing structure. After the hierarchical energy-absorbing structures are combined, they cooperate with each other. Under normal use, the prestressed strands bear the main force; when encountering accidental loads such as earthquakes or increased external loads, a relative rotation angle will be generated between each pair of second embedded parts through the limit pin as the axis, and a relative rotation angle will be generated between the second embedded parts and the prefabricated beam, thereby driving the energy-absorbing parts to move. At this time, the energy-absorbing parts will produce shear deformation to dissipate seismic energy; the node structure is reasonable and simple, with good overall balance and stability and low cost. The energy-absorbing structure formed by the prestressed strands connected between the two second embedded parts can not only ensure that the two second embedded parts are firmly connected to the prefabricated beams respectively, but also ensure the energy-absorbing mechanism effect of the node, thereby improving the earthquake resistance effect.

[0011] In order to facilitate the rotation between each pair of second embedded parts, drive the energy-absorbing parts to move more smoothly, and dissipate the earthquake energy more effectively, seismic isolation pads can be arranged on the prefabricated beams.

[0012] In order to further optimize the balance of the node combination energy-consuming structure, make the damping effect of the graded energy-consuming structure better, and improve the strength and reliability of the node, the number of the second embedded parts can be one pair more than the number of the first embedded parts, so that each pair of the first embedded parts is distributed on both sides with a pair of second embedded parts; or the number of the first embedded parts can be one pair more than the number of the second embedded parts, so that each pair of the second embedded parts is distributed on both sides with a pair of first embedded parts. That is, the graded energy-absorbing assembled beam hinge node is constituted by a structure with a pair of first embedded parts on both sides, or a pair of second embedded parts on both sides, optimizing the firmness and stability of the node connecting the prefabricated beams.

[0013] It can be seen that compared with the prior art, the present invention has at least the following beneficial effects:

[0014] The graded energy-dissipating prefabricated beam hinge node of the present invention adopts a dry connection method of prefabricated beams with prestressed strands and multiple embedded parts in terms of construction form, and is suitable for hinged connections of prefabricated beam nodes. Many of its structural members and parts can be prefabricated in advance, and the overall structure is reasonable, which is convenient for on-site construction and installation, and can achieve graded energy dissipation effects of prestressed energy dissipation and deformation energy dissipation of energy-dissipating parts.

[0015] The graded energy-dissipating assembled beam hinge node can optimize the energy dissipation mechanism and increase structural damping, thereby preventing damage to the structure when encountering situations such as earthquakes, improving the shock absorption effect, reducing costs, and achieving better application benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a graded energy dissipation assembled beam hinge node according to an embodiment of the present invention;

[0017] Figure 2 A top view of a graded energy dissipation assembled beam hinge node according to an embodiment of the present invention;

[0018] Figure 3 It is a left view of a graded energy dissipation assembled beam hinge node according to an embodiment of the present invention;

[0019] Figure 4 A front view of a second embedded part according to an embodiment of the present invention;

[0020] Figure 5 A top view of a second embedded part according to an embodiment of the present invention;

[0021] Figure 6 It is a left side view of the second embedded part of one embodiment of the present invention;

[0022] Figure 7 A front view of a first embedded part according to an embodiment of the present invention;

[0023] Figure 8 A top view of a first embedded part according to an embodiment of the present invention;

[0024] Fig. 9 It is a left side view of a first embedded part according to an embodiment of the present invention;

[0025] Fig.10 It is a front view of a graded energy dissipation assembled beam hinge node according to another embodiment of the present invention;

[0026] Fig.11 A top view of a graded energy dissipation assembled beam hinge node according to another embodiment of the present invention;

[0027] Fig.12 It is a left side view of a graded energy dissipation assembled beam hinge node according to another embodiment of the present invention;

[0028] Fig.13 A front view of an energy-consuming component according to an embodiment of the present invention;

[0029] Fig.14 A top view of an energy dissipation component according to an embodiment of the present invention;

[0030] Fig.15 It is a left side view of an energy dissipation component according to an embodiment of the present invention;

[0031] In the figure: 1 is a precast beam, 2 is a first embedded part, 4 is a T-shaped plate, 401 is a web plate, 402 is a wing plate, 5 is a notch plate, 6 is an arc plate, 7 is an energy dissipation part, 701 is a hole, 8 is a limit hole, 9 is a limit pin, 10 is a stiffening rib, 11 is a reserved hole for stranded wire, 12 is a prestressed stranded wire, 13 is an anchor, 14 is an elastic washer, 15 is an isolation pad, and 16 is an anchor nail. DETAILED DESCRIPTION

[0032] 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.

[0033] Example

[0034] Reference Figures 1 to 3 A graded energy-absorbing assembled beam hinge node comprises at least one pair of first embedded parts 2 and at least one pair of second embedded parts, each pair of first embedded parts 2 is distributed along the connection direction of two prefabricated beams 1, and the two side ends are respectively used to connect the two prefabricated beams 1; each pair of second embedded parts is distributed along the connection direction of the two prefabricated beams 1, and the two side ends are respectively used to connect the two prefabricated beams 1; each pair of first embedded parts 2 and each pair of second embedded parts are distributed at intervals, and the first embedded parts 2 and the second embedded parts adjacent to the same side are connected by energy-absorbing parts 7; the second embedded parts are provided with limiting holes 8 and stranded wire reserved holes 11, and each pair of second embedded parts are connected by limiting pins 9 inserted into the limiting holes 8 and prestressed strands 12 inserted into the stranded wire reserved holes 11.

[0035] When it is necessary to connect two prefabricated beams 1 through the graded energy-absorbing assembled beam hinge node, the two side ends of each pair of first embedded parts 2 and each pair of second embedded parts are connected to the two prefabricated beams 1 respectively. The tie-joint structure of the prestressed strands 12 constitutes a primary energy-absorbing structure; the energy-absorbing parts 7 connected between the first embedded parts 2 and the second embedded parts constitute a primary energy-absorbing structure. The graded energy-absorbing assembled beam hinge node cooperates with each other through this graded energy-absorbing combined structure. Under normal use, the prestressed strands 12 are tensioned in the strand reserved holes 11 to apply prestress, and the prestressed strands 12 bear the main force. When encountering accidental loads such as earthquakes or increased external loads, the second embedded parts will generate a relative rotation angle with the prefabricated beam 1, thereby driving the energy-absorbing parts 7 to move. At this time, the energy-absorbing parts 7 produce shear deformation to dissipate seismic energy and achieve the effect of energy dissipation and shock reduction.

[0036] Reference Figure 1 Seismic isolation pads 15 can be provided on the prefabricated beam 1 to facilitate the rotation between each pair of second embedded parts, to drive the energy absorbing parts 7 to move more smoothly, and to dissipate earthquake energy more effectively. The seismic isolation pads 15 can be rubber seismic isolation pads, which can be connected to the prefabricated beam 1 by gluing.

[0037] Reference Figures 4 to 6 The second embedded part can be a sleeve, specifically a steel sleeve.

[0038] In order to form a sleeve structure, the second embedded part may include a T-shaped plate 4, a slot plate 5 and an arc plate 6, the T-shaped plate 4 includes a transverse web 401 and a vertical wing plate 402, and the stranded wire reserved hole 11 is opened on the wing plate 402; the slot plate 5 is connected to the wing plate 402, and the first embedded part 2 and the slot plate 5 are connected through an energy-absorbing part 7; the arc plate 6 is connected to at least one of the wing plate 402 and the slot plate 5, and the limiting hole 8 is opened on the arc plate 6.

[0039] Reference Figure 1 The end of the web 401 of the T-shaped plate 4 can be connected to the prefabricated beam 1 through the anchor 16.

[0040] Reference Figure 4 , the arc plate 6 is connected to at least one of the wing plate 402 and the notch plate 5, the limiting hole 8 is provided on the arc plate 6, and the arc plate 6 can be a vertical steel plate. For example, the upper side of the arc plate 6 can be connected to the notch plate 5 above, the side adjacent to the precast beam 1 can be connected to the wing plate 402, and the other side can be a raised arc side. The limiting hole 8 can be arc-shaped to match the arc deformation range of the hinge node. The arc-shaped limiting hole 8 can be set at the arc side of the arc plate 6. All of the above-mentioned connections can be welded. The arc-shaped shape of the limiting hole 8 can be parallel to the arc side of the arc plate.

[0041] The web 401 may be parallel to the notch plate 5 , and both may be perpendicular to the wing plate 402 and the arc plate 6 , and the wing plate 402 and the arc plate 6 may be perpendicular.

[0042] Reference Figure 1 and Figure 4 The notch plate 5 may be provided with a recessed notch, and the end of the energy dissipating member 7 is inserted and connected in the notch.

[0043] Reference Figures 7 to 9 The first embedded part 2 may be an embedded plate, which may be an embedded steel plate, such as a transverse rectangular steel plate. The end of the embedded plate may be embedded and connected to the prefabricated beam 1 by an anchor 16. A groove may be provided on the embedded plate, the depth direction of the groove is consistent with the thickness direction of the embedded plate, and the end of the energy dissipation part 7 is inserted and connected in the groove.

[0044] The number of the first embedded parts 2 can be one pair more than the number of the second embedded parts, and a pair of first embedded parts 2 is distributed on both sides of each pair of second embedded parts;

[0045] Or, refer to Figures 10 to 12 The number of the second embedded parts can be one pair more than the number of the first embedded parts 2, and a pair of second embedded parts are distributed on both sides of each pair of the first embedded parts 2; thereby further optimizing the balance of the node combination energy-consuming structure, making the damping effect of the graded energy-consuming structure better, improving the node strength and reliability, and further ensuring the shock absorption effect.

[0046] Reference Fig.10 Each pair of first embedded parts 2 and each pair of second embedded parts can be evenly spaced, so that the overall structure of the connection node between the two prefabricated beams 1 is more symmetrical and balanced, and the firmness and stability are improved.

[0047] The seismic isolation pads 15 can be respectively arranged on both sides of the web 401, that is, the seismic isolation pads 15 can be respectively arranged on both sides of the web 401, and the seismic isolation pads 15 on both sides can be symmetrical with the web 401. The side surface of the seismic isolation pad 15 can contact the side surface of the web 401. One end surface of the side surface of the seismic isolation pad 15 is connected to the prefabricated beam 1, and the other end surface can contact the end surface of the notch plate 5.

[0048] The number of notches and grooves on the notch plate 5 and the corresponding first embedded part 2 is equal, and can be multiple and evenly distributed. Then the number of energy dissipation parts 7 connected between the notches and grooves on the notch plate 5 and the corresponding first embedded part 2 is also multiple, and the multiple energy dissipation parts 7 are also evenly distributed.

[0049] Reference Figures 13 to 15 One or more holes 701 may be provided on the energy dissipation member 7, which facilitates deformation when displacement occurs, thereby better dissipating earthquake energy. The hole 701 may be a regular shape such as a circle, or an irregular shape, preferably a hole 701 with an arc-shaped side.

[0050] The energy dissipation member 7 may be an energy dissipation plate, for example, an energy dissipation steel sheet, and the energy dissipation plate may be a vertical rectangular steel plate or steel sheet. The notch may be a rectangular groove. The energy dissipation plate may be perpendicular to the embedded plate and the notch plate 5, and may be parallel to the wing plate 402.

[0051] Reference Fig.10 The prestressed strand 12 can be fixed to the wing plate 402 by connecting the anchor 13 , and an elastic washer 14 can be provided between the anchor 13 and the wing plate 402 .

[0052] For example, the end of the prestressed strand 12 passes through the strand reserved hole 11 and is connected to the anchor 13 to achieve fixation with the wing plate 402. The anchor 13 is located at the side of the wing plate 402 adjacent to the prefabricated beam 1. An elastic washer 14 is arranged between the anchor 13 and the wing plate 402 to avoid local damage. The elastic washer 14 can be an annular rubber washer sleeved outside the prestressed strand 12.

[0053] Each wing plate 402 is provided with at least four stranded wire pre-reserved holes 11 evenly distributed along the same circumference, with the center of the wing plate 402 as the center of the circumference. The prestressed stranded wire 12 may be a steel stranded wire.

[0054] Reference Fig.10 The wing plate 402 may be connected with a stiffening rib 10. The stiffening rib 10 may be connected to adjacent sides of two wing plates 402 in each pair of second embedded parts. The stiffening rib 10 may be an angle steel stiffening rib. The number of the stiffening ribs 10 may be at least two, and they may be evenly distributed and welded to the sides of the wing plate 402.

[0055] In order to strengthen the structural firmness of the stiffening rib 10, the stiffening rib 10 can also be connected to the adjacent curved plate 6 or slot plate 5 at the same time. For example, a stiffening rib 10 is connected between the middle of the wing plate 402 and the middle of the curved plate 6. Stiffening ribs 10 are connected between the two sides of the wing plate 402 and the side surfaces of the slot plate 5.

[0056] The hierarchical energy dissipation assembled beam hinge node of this embodiment has the following working principle: in normal use, the hierarchical energy dissipation assembled beam hinge node is mainly subjected to the force by the prestressed strand 12, which can be a steel strand; when encountering accidental load or external load increase, the prestressed strand 12 will produce prestress damage and deform at the connection and splicing position of the two prefabricated beams 1; at this time, the external deformation causes the steel sleeve of the second embedded part to move downward, and the displacement is carried out in the direction of the limit hole 8, and the limit pin 9 plays a limiting role, thereby realizing the prestressed The precast beam 1 is hingedly connected; a rubber seismic isolation pad is arranged between the steel sleeve and the precast beam 1 to ensure that a relative rotation angle can occur between the two, while avoiding local damage to the concrete at the connecting end of the precast beam 1 caused by the steel sleeve; the embedded steel plate of the first embedded part 2 and the precast beam 1 remain relatively still, and a relative rotation angle is generated between the steel sleeve of the second embedded part and the precast beam 1, thereby driving the energy-absorbing steel sheet of the energy-absorbing part 7 to move. At this time, the energy-absorbing steel sheet produces shear deformation, thereby dissipating seismic energy, wherein the energy-absorbing steel sheet can have a hole 701 with an arc-shaped side, which is more conducive to energy dissipation.

[0057] The energy dissipation effect of the graded energy dissipation assembled beam hinge node of this embodiment is mainly divided into two stages:

[0058] In the first stage, under normal use, the external force is balanced by the prestressed strands 12;

[0059] In the second stage, as the external load increases, the energy-absorbing steel sheet of the energy-absorbing component 7 produces shear deformation to achieve metal energy dissipation; at the same time, the prestressed strands 12 also bear part of the load.

[0060] The rubber seismic isolation pad can isolate horizontal earthquakes and ensure an effective rotation angle between the steel sleeve and the prefabricated beam 1, thereby realizing the conversion of seismic energy into shear deformation of the energy-absorbing steel plate.

[0061] Analyzed from the force angle, the graded energy-absorbing prefabricated beam hinge node of the present embodiment, as the hinge node for assembling the end of the prefabricated beam 1, can greatly reduce the calculated value of the bending moment under the same load condition, avoid damage to the connection and splicing position of the prefabricated beam 1, and optimize the force transmission mechanism. The energy that cannot be dissipated is instead offset in a graded manner by the prestressed strands 12 and the energy-absorbing parts 7.

[0062] The coordinated use of the limit pin 9 and the limit hole 8 ensures that the deformation of the joint of the prefabricated beam 1 is at a predetermined position, realizing the conversion of external input energy into metal deformation energy, and ensuring that the second embedded part steel sleeve and the embedded steel plate of the first embedded part 2 are not damaged.

[0063] After the deformation is completed, the engineering personnel can restore the graded energy dissipation performance of the graded energy dissipation prefabricated beam hinge node as a prefabricated beam hinge node by replacing the energy dissipation steel sheet of the energy dissipation component 7 and re-tensioning the prestressed strands 12 .

[0064] The prestress is applied on the wing plate 402 of the T-shaped plate 4 as an anchoring end, which can effectively avoid the prestress loss caused by local damage to the concrete during the tensioning process. Its prestressing method is better than the traditional pre-tensioning method and post-tensioning method. The prestressed strand 12 can effectively resist the horizontal lateral force, so that the graded energy dissipation assembled beam hinge node has self-reset capability.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graded energy dissipation assembled beam hinge node, characterized in that: include: At least one pair of first embedded parts, each pair of first embedded parts is distributed along the connection direction of the two precast beams, and the two side ends are respectively used to connect the two precast beams; At least one pair of second embedded parts, each pair of second embedded parts is distributed along the connection direction of the two prefabricated beams, and the two side ends are respectively used to connect the two prefabricated beams; Each pair of the first embedded parts and each pair of the second embedded parts are arranged at intervals, and the first embedded parts and the second embedded parts adjacent to each other on the same side are connected via energy-absorbing parts; The second embedded parts are provided with limiting holes and reserved holes for stranded wires, and each pair of the second embedded parts are connected by limiting pins inserted into the limiting holes and prestressed stranded wires inserted into the reserved holes for stranded wires.

2. The hierarchical energy dissipation assembled beam hinge node according to claim 1 is characterized in that: Seismic isolation pads are arranged on the prefabricated beams.

3. The hierarchical energy dissipation assembled beam hinge node according to claim 1 or 2, characterized in that: The number of the second embedded parts is one pair more than the number of the first embedded parts, and a pair of the second embedded parts is distributed on both sides of each pair of the first embedded parts.

4. The hierarchical energy dissipation assembled beam hinge node according to claim 1 or 2, characterized in that: The number of the first embedded parts is one pair more than the number of the second embedded parts, and a pair of the first embedded parts is distributed on both sides of each pair of the second embedded parts.

5. The hierarchical energy dissipation assembled beam hinge node according to claim 1 or 2, characterized in that: The second embedded part includes a T-shaped plate, a notch plate and an arc-shaped plate, the T-shaped plate includes a transverse web and a vertical wing plate, the stranded wire reserved hole is provided on the wing plate; the notch plate is connected to the wing plate, the first embedded part and the notch plate are connected via an energy-absorbing part; the arc-shaped plate is connected to at least one of the wing plate and the notch plate, and the limiting hole is provided on the arc-shaped plate.

6. The hierarchical energy dissipation assembled beam hinge node according to claim 5 is characterized in that: The notch plate is provided with a recessed notch, and the end of the energy absorbing component is inserted and connected in the notch.

7. The hierarchical energy dissipation assembled beam hinge node according to claim 5 is characterized in that: The prestressed strands are fixed to the wing plates via connecting anchors, and elastic washers are arranged between the anchors and the wing plates.

8. The hierarchical energy dissipation assembled beam hinge node according to claim 5, characterized in that: Each of the wing plates is provided with at least four reserved holes for the stranded wires which are evenly distributed along the same circumference, and the circumference has the center of the wing plate as the center.

9. The hierarchical energy dissipation assembled beam hinge node according to claim 5, characterized in that: The wing plates are connected with stiffening ribs.

10. The hierarchical energy dissipation assembled beam hinge node according to claim 5, characterized in that: The limiting hole is in an arc-shaped curved shape.

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