Self-resetting energy dissipation inorganic glue composite bamboo beam column joint and construction method

Abstract

The invention discloses a self-resetting energy-dissipation inorganic glue composite bamboo beam column joint and a construction method, and relates to the technical field of building structures.The self-resetting energy-dissipation inorganic glue composite bamboo beam column joint comprises inorganic glue composite bamboo columns, inorganic glue composite bamboo beams and connecting steel pipes, and the inorganic glue composite bamboo columns are spliced through the connecting steel pipes; the inorganic glue composite bamboo beam is connected with the inorganic glue composite bamboo column through the composite damper; wherein a cross-shaped steel plate is arranged in the connecting steel pipe, the inorganic glue composite bamboo column is connected with the cross-shaped steel plate in an inserted mode, and glue is injected into an inserted connection gap; the composite damper comprises a metal damper and an SMA screw connected with the metal damper in parallel. According to the inorganic glue composite bamboo column, the connecting steel pipes internally provided with the cross-shaped steel plates are adopted for splicing, and the initial rigidity and the bearing capacity are guaranteed; the composite dampers are connected between the beam columns, residual deformation of the joint is reduced, and the anti-seismic requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node and a construction method. Background Art

[0002] In bamboo and wood structures, frame structures are one of the commonly used systems in modern bamboo and wood structures due to the clear force mode. Nodes are the key to structural design, and the reliability of node connections has an important impact on the overall performance of the structure. Steel-filled plate bolt connection is a commonly used node connection method, but due to the bolt holes and slotted holes, there is slippage under small deformations, and the initial stiffness is low. In addition, due to the material characteristics of bamboo and wood, the cross-grain tensile strength is low, and material splitting is prone to occur under horizontal loads. This failure is brittle failure, poor ductility, and difficult to repair.

[0003] The following technical solutions exist in the prior art: Chinese patent (publication number CN110629897A, publication date 2019.12.31) discloses a multi-stage energy-consuming post-tensioned self-reset node, including a steel column, a T-type connector, an SMA damper, a post-tensioned prestressed steel rod and a steel beam. A steel beam is installed on one side of the steel column flange, and an oblong bolt hole is formed at the end of the steel beam. T-type connectors are installed on the upper and lower sides of the steel beam end; the T-type connector is connected to the steel column flange; one end of the SMA damper is connected to the T-type connector, and the other end is connected to the anchor device. This solution consumes energy through friction between the web of the T-type member and the filler plate of the steel beam, and the energy consumption capacity is limited, and the friction sliding energy consumption will reduce the node stiffness.

[0004] A Chinese patent (publication number CN119466148A, publication date 2025.02.18) discloses an inorganic glue composite bamboo seismic beam-column node with a restorable function, which is composed of an inorganic glue composite bamboo spliced ​​beam, an inorganic glue composite bamboo column and a connector. Compression steel plates are arranged on both sides of the inorganic glue composite bamboo column, and upper energy dissipation angle steel and lower energy dissipation angle steel are fixed on each compression steel plate; an inorganic glue composite bamboo spliced ​​beam is fixed between the upper energy dissipation angle steel and the lower energy dissipation angle steel. Although this solution can meet the seismic requirements, it is complex in structure and cumbersome in installation. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a self-resetting energy-absorbing inorganic adhesive composite bamboo beam-column node and a construction method. The inorganic adhesive composite bamboo column is spliced ​​with connecting steel pipes with built-in cross-shaped steel plates to ensure initial stiffness and bearing capacity; composite dampers are connected between the beams and columns to reduce residual deformation of the node and meet seismic requirements.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a self-resetting energy-absorbing inorganic adhesive composite bamboo beam-column node, comprising an inorganic adhesive composite bamboo column, an inorganic adhesive composite bamboo beam and a connecting steel pipe, wherein the inorganic adhesive composite bamboo column is spliced ​​by connecting the steel pipe, and the inorganic adhesive composite bamboo beam is connected to the inorganic adhesive composite bamboo column through a composite damper;

[0008] Among them, the connecting steel pipe has a cross-shaped steel plate built in, the inorganic glue composite bamboo column is plugged into the cross-shaped steel plate, and glue is injected into the plug-in gap; the composite damper includes a metal damper and an SMA screw arranged in parallel with the metal damper.

[0009] As a further implementation, the inorganic adhesive composite bamboo column has a slot adapted to the cross-shaped steel plate.

[0010] As a further implementation method, a plurality of rows of mounting holes are provided on the side of the connecting steel pipe, and bolts pass through the mounting holes to connect the inorganic adhesive composite bamboo column.

[0011] As a further implementation method, one end of the composite damper is connected to a frame connector connected to the side of the steel pipe, and the other end is connected to the inorganic adhesive composite bamboo beam through a shear connector.

[0012] As a further implementation, the SMA screw is symmetrically arranged relative to the metal damper, and one end of the SMA screw is connected to the frame connector, and the other end is connected to the shear connector.

[0013] As a further implementation, the SMA screw includes a smooth section and threaded sections at both ends of the smooth section, and the threaded sections are connected to the frame connector and the shear connector respectively through double nuts.

[0014] As a further implementation, the main body of the frame connector is a rectangular slot structure, and a plurality of transverse plates are provided in the frame connector;

[0015] The shear connector includes a connector end plate and a shear key. One side of the connector end plate is provided with at least two shear keys perpendicular to it. The connector end plate is connected to the SMA screw rod, and the shear key is plugged into the inorganic glue composite bamboo beam and matched with embedded reinforcement.

[0016] As a further implementation, the metal damper comprises two damper end plates parallel to each other, the two damper end plates are connected via two damper flanges, and a damper web is connected between the two damper flanges; stiffening ribs are symmetrically provided on both sides of the damper web;

[0017] The SMA screw is connected between two damper end plates.

[0018] In a second aspect, an embodiment of the present invention further provides a construction method for a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node, comprising:

[0019] Prefabricated composite dampers, inorganic adhesive composite bamboo beams, inorganic adhesive composite bamboo columns and connecting steel pipes;

[0020] Insert the inorganic glue composite bamboo column into the connecting steel pipe, and inject glue into the gap between the connecting steel pipe and the inorganic glue composite bamboo column;

[0021] The composite damper is connected between the inorganic adhesive composite bamboo column and the inorganic adhesive composite bamboo beam to form a beam-column node.

[0022] As a further implementation method, the inorganic adhesive composite bamboo beam is connected to the composite damper by means of shear keys and embedded reinforcement.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) The inorganic adhesive composite bamboo column of the present invention is spliced ​​by connecting steel pipes with built-in cross-shaped steel plates; and the connecting steel pipes are connected to the spliced ​​inorganic adhesive composite bamboo columns by bolts, and glue is injected into the joints to form a connection method of cross plug-in, bolt connection and adhesive connection to ensure initial stiffness and bearing capacity; the inorganic adhesive composite bamboo beam and the connecting steel pipe are connected by a composite damper, and the composite damper is formed by a metal damper and an SMA screw in parallel. Under the action of strong earthquakes, the metal damper yields and consumes energy, and the shape memory alloy mainly provides self-resetting ability to reduce the residual deformation of the node.

[0025] (2) The joint end of the inorganic adhesive composite bamboo column and the connecting steel pipe of the present invention is provided with a cross-shaped slot, so that the inorganic adhesive composite bamboo column can be quickly plugged into the connecting steel pipe; and the cross-shaped steel plate and the cross-shaped slot can play a guiding role in the plug-in process, which can prevent the inorganic adhesive composite bamboo column from circumferentially deviating and ensure the assembly accuracy of the two; and the cross-shaped steel plate can transmit shear force; the inorganic adhesive composite bamboo beam and the composite damper are connected by a shear key and an embedded steel bar, and the embedded steel bar transmits bending moment, and the shear key transmits shear force; therefore, a cross-shaped steel plate is built between the inorganic adhesive composite bamboo columns. The connecting steel pipe installation method of the plate, combined with the connection method of composite dampers, shear keys and embedded reinforcement between the inorganic adhesive composite bamboo beams and the connecting steel pipes, enhances the seismic performance of the entire beam-column node. The node has a high bearing capacity and initial stiffness. The inorganic adhesive composite bamboo frame structure using this node form has high lateral stiffness and can be used in multi-layer inorganic adhesive composite bamboo frame structures without the need for additional supports or other measures. In addition, the inorganic adhesive composite bamboo frame structure with self-resetting energy-absorbing nodes has high energy absorption capacity and small residual deformation, and the seismic performance and repairability of the structure are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 is a schematic diagram of a composite bamboo beam-column node structure according to one or more embodiments of the present invention;

[0028] Figure 2 is a schematic diagram of a connecting steel plate structure according to one or more embodiments of the present invention;

[0029] Figure 3 is a schematic diagram of a shear connector according to one or more embodiments of the present invention;

[0030] Figure 4 is a schematic diagram of the structure of a composite damper according to one or more embodiments of the present invention;

[0031] Figure 5 yes Figure 4 AA section view;

[0032] Among them, 1. Inorganic adhesive composite bamboo column, 2. Inorganic adhesive composite bamboo beam, 3. Connecting steel pipe, 4. Metal damper, 5. Shear connector, 6. Connector end plate, 7. Shear key, 8. Damper flange, 9. Damper web, 10. Stiffening rib, 11. Damper end plate, 12. SMA screw, 13. Steel pipe, 14. Cross-shaped steel plate, 15. Frame connector. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] Embodiment 1:

[0036] This embodiment provides a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node, such as Figure 1As shown, it includes an inorganic adhesive composite bamboo column 1, an inorganic adhesive composite bamboo beam 2, a connecting steel pipe 3 and a composite damper. The inorganic adhesive composite bamboo column 1 is spliced ​​by the connecting steel pipe 3 with a built-in cross-shaped steel plate 14; and the connecting steel pipe 3 is connected to the spliced ​​inorganic adhesive composite bamboo column 1 by bolts, and glue is injected into the joint to form a cross-plug connection, bolt connection and adhesive connection connection mode to enhance the structural stability. The inorganic adhesive composite bamboo beam 2 and the connecting steel pipe 3 are connected by a composite damper, which is formed by a metal damper 4 and an SMA (shape memory alloy) screw in parallel. Under the action of a strong earthquake, the metal damper 4 yields and consumes energy, and the shape memory alloy mainly provides self-reset capability to reduce the residual deformation of the node.

[0037] Specifically, Figure 2 As shown, the shape of the connecting steel pipe 3 is adapted to the shape of the inorganic adhesive composite bamboo column 1, which is a rectangular tube structure with a hollow interior, and the cross structure is composed of two mutually perpendicular steel plates 14; since the inorganic adhesive composite bamboo column 1 is plugged into the connecting steel pipe 3, the inorganic adhesive composite bamboo column 1 enters the connecting steel pipe 3 for a certain length, and therefore, the splicing ends of the inorganic adhesive composite bamboo column 1 and the connecting steel pipe 3 are provided with a cross-shaped slot, and the cross-shaped slot is adapted to the cross-shaped steel plate 14, so that the inorganic adhesive composite bamboo column 1 can be quickly plugged into the connecting steel pipe 3; wherein, the cooperation between the cross-shaped steel plate 14 and the cross-shaped slot can play a guiding role in the plug-in process, and can prevent the inorganic adhesive composite bamboo column 1 from circumferential displacement, thereby ensuring the assembly accuracy of the two; and can also transmit shear force at the same time.

[0038] The height of the connecting steel pipe 3 is determined according to the actual force and assembly requirements of the inorganic adhesive composite bamboo column 1. The four sides of the connecting steel pipe 3 are each provided with multiple rows of mounting holes, and bolts pass through the mounting holes to connect the connecting steel pipe 3 and the inorganic adhesive composite bamboo column 1 together; the specific arrangement of the mounting holes can be determined according to the actual assembly requirements. In this embodiment, two rows of mounting holes are set on each side of the connecting steel pipe 3, and the setting position of the mounting holes corresponds to the cavity formed by the cross-shaped steel plate 14 and the inner wall of the connecting steel pipe 3, which is convenient for connecting the inorganic adhesive composite bamboo column 1 and the connecting steel pipe 3.

[0039] Glue is injected into the slots of the inorganic glue composite bamboo column 1, the gaps between the installation holes, and the gaps between the connecting steel pipe 3 and the inorganic glue composite bamboo column 1 to form a bolt-glue composite connection mode, thereby enhancing the connection strength and integrity of the structure.

[0040] like Figure 1 As shown, one end of the composite damper is connected to the frame connector 15 connected to the side of the steel pipe 3, and the other end is connected to the inorganic glue composite bamboo beam 2 through the shear connector 5. Through the combined action of the frame connector 15 and the shear connector 5, reasonable transmission and distribution of force are achieved, ensuring the integrity of the inorganic glue composite bamboo column 1 and the inorganic glue composite bamboo beam 2.

[0041] The main structure of the frame connector 15 is a rectangular groove structure, with an open structure on one side facing the connecting steel pipe 3 and a closed structure on the other side. The open end of the frame connector 15 is welded and fixed to the connecting steel pipe 3; the composite damper is connected to the closed end of the frame connector 15. A plurality of transverse plates are arranged inside the rectangular groove structure, and a plurality of transverse plates are arranged at intervals along the height direction of the connecting steel pipe 3, so as to increase the connection strength of the frame connector 15.

[0042] like Figure 3 As shown, the shear connector 5 includes a connector end plate 6 and a shear key 7. The connector end plate 6 is arranged parallel to the inorganic adhesive composite bamboo column 1 and is connected to the metal damper 4 and the SMA screw 12. The shear key 7 is perpendicular to the connector end plate 6, and at least two shear keys 7 are arranged along the width direction of the connector end plate 6. The length of the shear key 7 is less than the length of the connector end plate 6. After the shear key 7 is plugged and matched with the inorganic adhesive composite bamboo beam 2, embedded steel bars are added within the distance between the shear key 7 and the end of the connector end plate 6, so that the inorganic adhesive composite bamboo beam 2 is connected to the metal damper 4 by using the shear key 7 and embedded steel bars, wherein the embedded steel bars transmit bending moment and the shear key 7 transmits shear force.

[0043] like Figure 1 and Figure 4 As shown, the composite damper includes a metal damper 4 and an SMA screw 12. Figure 1 In the direction of the view shown, SMA screws 12 are symmetrically arranged on the upper and lower sides of the metal damper 4, and the SMA screws 12 form a parallel structure with the metal damper 4. One, two or more SMA screws 12 can be arranged on both sides of the metal damper 4, depending on the actual seismic requirements. Under the action of small earthquakes, the metal damper 4 is elastic and provides rigidity; under medium and large earthquakes, the metal damper 4 yields and dissipates energy, and the SMA screws 12 mainly provide self-reset capability, and the main structure is protected by the metal damper 4.

[0044] like Figure 4 and Figure 5 As shown, the metal damper 4 includes a damper end plate 11, a damper flange 8, and a damper web 9. The two damper end plates 11 are parallel to each other, and two damper flanges 8 are connected therebetween. The damper flange 8 is perpendicular to the damper end plate 11, and there is a certain distance between the two damper flanges 8. The damper web 9 is connected between the two damper flanges 8. The damper flange 8 is made of low yield point steel. In order to prevent the steel plate 14 from premature local buckling and instability, stiffening ribs 10 are provided at the left and right ends of the damper web 9, respectively. The stiffening ribs 10 are welded and fixed to the damper flange 8 and the damper end plate 11; as shown in FIG. Figure 4 As shown, the stiffening ribs 10 are symmetrically distributed on the front and rear sides of the damper web 9 .

[0045] In this embodiment, two SMA screws 12 are respectively arranged on the upper and lower sides of the metal damper 4, the two ends of the SMA screw 12 are threaded sections, and a smooth section is between the two threaded sections; the threaded sections are threadedly connected to the damper end plate 11 and locked by double nuts on the outside of the damper end plate 11. In order to avoid the SMA screw 12 from buckling under pressure and reduce residual deformation, the SMA screw 12 is applied with an initial pre-tension strain.

[0046] The inorganic adhesive composite bamboo column 1 of this embodiment is spliced ​​into one by a connecting steel pipe 3 with a built-in cross-shaped structure. Compared with the connection using only steel filler plates, the connecting steel pipe 3 constrains the bamboo material to prevent splitting; and glue is injected at the gap to ensure that the beam-column node has good initial stiffness and bearing capacity. The damage of the node is transferred to the beam end through the metal damper 4. Under strong earthquakes, the inorganic adhesive composite bamboo component and the core area of ​​the node are elastic, and the metal damper 4 yields and consumes energy, which can achieve the seismic requirements of strong nodes and weak components. The SMA screw 12 reduces the residual deformation of the node, and the metal damper 4 is connected to the main structure by bolts. After the metal damper 4 is damaged after the earthquake, it is convenient to replace it, so as to achieve rapid recovery of the structure after a strong earthquake and reduce repair costs and time.

[0047] The beam-column node of this embodiment has high bearing capacity and initial stiffness. The inorganic adhesive composite bamboo frame structure using this node form has high lateral stiffness and can be used in multi-layer inorganic adhesive composite bamboo frame structures (6 layers). In addition, the inorganic adhesive composite bamboo frame structure with self-resetting energy-absorbing nodes has high energy absorption capacity and small residual deformation, and the seismic performance and repairability of the structure are significantly improved.

[0048] Embodiment 2:

[0049] This embodiment provides a construction method for a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node, based on the self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node described in Example 1, comprising the following steps:

[0050] Step 1: prefabricate a composite damper, an inorganic adhesive composite bamboo beam 2, an inorganic adhesive composite bamboo column 1 and a connecting steel pipe 3, and pre-join the inorganic adhesive composite bamboo beam 2 and the shear connector 5 together;

[0051] Step 2: Align the slot of the inorganic glue composite bamboo column 1 with the cross-shaped steel plate 14 of the connecting steel pipe 3 for insertion, screw bolts into the mounting holes, connect the connecting steel pipe 3 and the plug-in end of the inorganic glue composite bamboo column 1 together, and inject glue into the gap.

[0052] One end of the composite damper is connected to the frame connector 15 connected to the side of the steel pipe 3 by bolts, and the other end of the composite damper is connected to the shear connector 5 by bolts.

[0053] In this embodiment, the splicing components are prefabricated in the factory and only need to be assembled on site, thereby improving construction efficiency.

[0054] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node, characterized in that: It includes an inorganic glue composite bamboo column, an inorganic glue composite bamboo beam and a connecting steel pipe, wherein the inorganic glue composite bamboo column is spliced ​​by the connecting steel pipe, and the inorganic glue composite bamboo beam is connected to the inorganic glue composite bamboo column through a composite damper; Among them, the connecting steel pipe has a cross-shaped steel plate built in, the inorganic glue composite bamboo column is plugged into the cross-shaped steel plate, and glue is injected into the plug-in gap; the composite damper includes a metal damper and an SMA screw arranged in parallel with the metal damper.

2. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 1, characterized in that: The inorganic adhesive composite bamboo column has a slot matched with the cross-shaped steel plate.

3. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 1 or 2, characterized in that: The side surface of the connecting steel pipe is provided with a plurality of rows of mounting holes, and bolts pass through the mounting holes to connect with the inorganic adhesive composite bamboo column.

4. The self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 1 is characterized in that: One end of the composite damper is connected to a frame connector connected to the side of the steel pipe, and the other end is connected to the inorganic adhesive composite bamboo beam through a shear-resistant connector.

5. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 4, characterized in that: The SMA screw rod is symmetrically arranged relative to the metal damper, and one end of the SMA screw rod is connected to the frame connecting piece, and the other end of the SMA screw rod is connected to the shear connecting piece.

6. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 5, characterized in that: The SMA screw comprises a smooth section and threaded sections at both ends of the smooth section, and the threaded sections are connected to the frame connector and the shear connector respectively through double nuts.

7. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to any one of claims 4 to 6, characterized in that: The main body of the frame connector is a rectangular slot structure, and a plurality of transverse plates are arranged inside the frame connector; The shear connector includes a connector end plate and a shear key. One side of the connector end plate is provided with at least two shear keys perpendicular to it. The connector end plate is connected to the SMA screw rod, and the shear key is plugged into the inorganic glue composite bamboo beam and matched with embedded reinforcement.

8. A self-resetting energy-dissipating inorganic adhesive composite bamboo beam-column node according to claim 1 or 4, characterized in that: The metal damper comprises two damper end plates parallel to each other, the two damper end plates are connected by two damper flanges, and a damper web is connected between the two damper flanges; stiffening ribs are symmetrically arranged on both sides of the damper web; The SMA screw is connected between two damper end plates.

9. A construction method for a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node according to any one of claims 1 to 8, characterized in that: include: Prefabricated composite dampers, inorganic adhesive composite bamboo beams, inorganic adhesive composite bamboo columns and connecting steel pipes; Insert the inorganic glue composite bamboo column into the connecting steel pipe, and inject glue into the gap between the connecting steel pipe and the inorganic glue composite bamboo column; The composite damper is connected between the inorganic adhesive composite bamboo column and the inorganic adhesive composite bamboo beam to form a bamboo beam-column node.

10. The construction method of a self-resetting energy-consuming inorganic adhesive composite bamboo beam-column node according to claim 9, characterized in that: The inorganic adhesive composite bamboo beam is connected to the composite damper by means of shear keys and embedded reinforcement.

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