Inorganic glue composite bamboo frame structure with recoverable function

Abstract

The invention discloses an inorganic glue composite bamboo frame structure capable of recovering functions, and relates to the technical field of building structures, the inorganic glue composite bamboo frame structure comprises a frame beam, inorganic glue composite bamboo columns and energy dissipation steel shoes, the frame beam comprises an inorganic glue composite bamboo beam and metal dampers, and the metal dampers are connected to the two ends of the inorganic glue composite bamboo beam; the inorganic glue composite bamboo columns are spliced at the steel joints, and the steel joints are fixed to the metal dampers. The energy dissipation steel shoe is mounted at the column foot of the bottom layer inorganic glue composite bamboo column, and the energy dissipation steel shoe is used for being fixed to a foundation; the metal damper and the energy dissipation steel shoe yield during an earthquake to dissipate earthquake energy. The metal dampers are installed at the beam ends, the energy dissipation steel shoes are adopted at the column feet, under the earthquake action, the metal dampers and the energy dissipation steel shoes yield to dissipate energy in sequence to serve as a first anti-seismic defensive line and a second anti-seismic defensive line of the structure, damage is concentrated on the metal dampers, and the purpose of protecting the main body structure is achieved; the steel and bamboo mixed joints are adopted, and the joint rigidity is high.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, in particular to an inorganic adhesive composite bamboo frame structure with restorable functions. Background Art

[0002] In bamboo (wood) building structures, frame structure is one of the commonly used systems in modern bamboo (wood) structures, and the nodes are mostly connected by steel-filled plates and bolts. This structural form has major problems: due to the low tensile strength of the material's transverse grain, bamboo (wood) beam-column nodes and column foot nodes are prone to transverse grain splitting failure under horizontal loads. This failure mode is brittle failure with poor ductility. Experiments have found that the column bottom is damaged before the beam end, and the splitting is severe. It is difficult to achieve the seismic design requirements of "strong nodes and weak components" and "strong columns and weak beams" in bamboo (wood) frames. The lateral stiffness is insufficient, and due to the presence of bolt holes, the nodes have a slip stage and low initial stiffness. There is also the problem that post-earthquake damage is difficult to repair. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a functionally restorable inorganic adhesive composite bamboo frame structure, in which metal dampers are installed at the ends of beams and energy-absorbing steel boots are used at the bases of columns. Under the action of an earthquake, the metal dampers and the energy-absorbing steel boots yield and absorb energy successively, serving as the first and second lines of seismic defense for the structure, so that damage is concentrated on the metal dampers, thereby achieving the purpose of protecting the main structure. A steel-bamboo hybrid node is adopted, and the node stiffness is large.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] The embodiment of the present invention provides a functionally restorable inorganic adhesive composite bamboo frame structure, comprising:

[0006] The frame beam comprises an inorganic adhesive composite bamboo beam and a metal damper, wherein the metal damper is connected to both ends of the inorganic adhesive composite bamboo beam;

[0007] Inorganic adhesive composite bamboo columns, the inorganic adhesive composite bamboo columns are spliced ​​at steel nodes, and the steel nodes are fixed to metal dampers;

[0008] The energy-absorbing steel boot is installed at the column foot of the inorganic adhesive composite bamboo column at the bottom layer, and the energy-absorbing steel boot is used to be fixed to the foundation; the metal damper and the energy-absorbing steel boot yield during an earthquake to dissipate the earthquake energy.

[0009] As a further implementation method, the metal damper includes a first connecting end plate, a first web, end stiffening ribs and flanges, wherein the first web is connected between two flanges; the two first connecting end plates are arranged parallel to each other and are connected to each other through two flanges and the first web.

[0010] The end stiffening ribs are symmetrically arranged on both sides of the first web, and the end stiffening ribs are welded to the flange and the first connecting end plate as a whole.

[0011] As a further implementation method, the metal damper and the inorganic adhesive composite bamboo beam, as well as the steel node and the inorganic adhesive composite bamboo column are connected via connecting pieces.

[0012] As a further implementation, the connecting member includes a second connecting end plate and a second web, and the second connecting end plate and the second web are connected to form a T-shaped structure;

[0013] The second web is inserted into the inorganic adhesive composite bamboo beam or inorganic adhesive composite bamboo column, and a bolt-adhesive hybrid connection method is adopted; the second connection end plate is bolted to the metal damper or the inorganic adhesive composite bamboo beam or inorganic adhesive composite bamboo column.

[0014] As a further implementation, the steel node includes a node core region, a connecting section is provided on one side of the node core region, and the connecting section is connected to the metal damper;

[0015] An inner filling steel plate is arranged at the lower side of the core area of ​​the node, and the inner filling steel plate is inserted into the inorganic glue composite bamboo column.

[0016] As a further implementation method, the inner filling steel plate is connected to the inorganic adhesive composite bamboo column by bolts and glued together.

[0017] As a further implementation method, the connection between the connecting piece and the inorganic adhesive composite bamboo beam, the connecting piece or the internal filling steel plate and the inorganic adhesive composite bamboo column is respectively provided with embedded reinforcement to prevent the bamboo from splitting and improve the bearing capacity of the connection area.

[0018] As a further implementation method, the energy-absorbing steel boot is connected to the foundation via anchor bolts.

[0019] As a further implementation method, the energy-absorbing steel boot comprises a steel sleeve, an energy-absorbing steel plate and a supporting end plate, the steel sleeve is sleeved on the outside of the inorganic glue composite bamboo column, and the gap between the two is injected with glue;

[0020] A supporting end plate is installed at the bottom of the steel sleeve, and a plurality of energy-absorbing steel plates are arranged around the steel sleeve.

[0021] As a further implementation method, the energy-absorbing steel plate is fixed to the steel sleeve and the supporting end plate through a connecting plate, and the energy-absorbing steel plate and the connecting plate are connected by bolts, so that it is convenient to replace them after being damaged.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The present invention installs metal dampers at the ends of inorganic glue composite bamboo beams and energy-absorbing steel boots at the column bases of inorganic glue composite bamboo columns. Under the action of an earthquake, the metal dampers and the energy-absorbing steel plates in the energy-absorbing steel boots yield and absorb energy successively, serving as the first and second lines of earthquake-resistant defense for the structure, so that damage is concentrated on the metal dampers to protect the main structure. The composite bamboo components maintain elasticity to avoid bamboo splitting. After the earthquake, the metal dampers are replaced to quickly restore the use function of the structure and reduce economic losses. The beam-column nodes are steel-bamboo hybrid nodes, steel boots are installed at the column bases, and glue is injected at the gaps. The frame structure formed by the beam-column nodes and the column base nodes has good lateral stiffness and does not require additional support or filling walls to meet the requirements of a multi-story frame structure. At the same time, the earthquake-resistant design requirements of "strong columns and weak beams" and "strong nodes and weak components" are achieved.

[0024] (2) The web of the connector of the present invention is inserted into the inorganic glue composite bamboo beam / column, and a bolt-glue hybrid connection method is adopted; the inner filling steel plate of the steel node is inserted into the inorganic glue composite bamboo column, and a bolt-glue hybrid connection method is also adopted; and the connection between the connector and the inorganic glue composite bamboo beam, the connector and the inorganic glue composite bamboo column, and the steel node and the inorganic glue composite bamboo column are respectively provided with embedded reinforcement to improve the bearing capacity of the frame structure and realize the effective transmission of bending moment and shear force.

[0025] (3) The column foot node of the inorganic adhesive composite bamboo column of the present invention is based on the installation of energy-absorbing steel boots, and glue is injected into the gap between the steel sleeve and the inorganic adhesive composite bamboo column to improve the integrity and initial stiffness of the node, and an energy-absorbing steel plate is attached to the side of the steel sleeve to improve the bending bearing capacity and energy absorption capacity of the column foot node. 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 an inorganic adhesive composite bamboo frame structure according to one or more embodiments of the present invention;

[0028] Figure 2 is a schematic diagram of a beam-column node structure according to one or more embodiments of the present invention;

[0029] FIG3( a ) is a schematic diagram of the structure of a metal damper according to one or more embodiments of the present invention;

[0030] FIG3( b ) is a cross-sectional view taken along line AA of FIG3( a );

[0031] FIG. 4( a ) is a front view of a connector according to one or more embodiments of the present invention;

[0032] FIG4( b ) is a top view of a connector according to one or more embodiments of the present invention;

[0033] Figure 5 is a schematic diagram of a steel node structure according to one or more embodiments of the present invention;

[0034] Figure 6 is a schematic diagram of the installation of an energy-dissipating steel boot according to one or more embodiments of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of an energy-absorbing steel boot according to one or more embodiments of the present invention.

[0036] Among them, 1. frame beam, 2. inorganic adhesive composite bamboo column, 3. steel node, 4. foundation, 5. connector, 6. energy-absorbing steel boot, 7. metal damper, 8. flange, 9. first web, 10. end stiffener, 11. first connection end plate, 12. second web, 13. second connection end plate, 14. embedded reinforcement, 15. inorganic adhesive composite bamboo beam, 16. node core area, 17. internal filling steel plate, 18. connection section, 19. steel sleeve, 20. energy-absorbing steel plate, 21. connection plate, 22. support end plate. DETAILED DESCRIPTION

[0037] 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.

[0038] In the present application, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0039] Embodiment 1:

[0040] This embodiment provides a restorable inorganic adhesive composite bamboo frame structure, combined with Figure 1 and Figure 2As shown, it includes a frame beam 1, a steel node 3, an inorganic adhesive composite bamboo column 2, and an energy-absorbing steel boot 6. The frame beam 1 and the inorganic adhesive composite bamboo column 2 are connected to form a frame through the steel node 3 to form a lateral force resistance system; the energy-absorbing steel boot 6 is installed at the column foot node of the inorganic adhesive composite bamboo column 2; wherein, the frame beam 1 includes an inorganic adhesive composite bamboo beam 15 and a metal damper 7. This embodiment introduces seismic toughness into the composite bamboo frame structure by installing a metal damper 7 at the beam end and using an energy-absorbing steel boot 6 at the column foot; under the action of an earthquake, the metal damper 7 and the energy-absorbing steel boot 6 yield and absorb energy successively, serving as the first and second seismic defense lines of the structure, so that the damage is concentrated on the metal damper 7 and the energy-absorbing steel boot 6, thereby protecting the main structure, and the composite bamboo components maintain elasticity to avoid bamboo splitting. After the earthquake, the metal damper 7 and the energy-absorbing steel boot 6 are replaced to quickly restore the use function of the structure.

[0041] Specific, combined Figure 2 As shown, the two ends of the inorganic adhesive composite bamboo beam 15 are respectively installed with connectors 5, one end of the metal damper 7 is connected to the inorganic adhesive composite bamboo beam 15 through the connector 5, and the other end is connected to the steel node 3, and the connection between the metal damper 7 and the connector 5 and the steel node 3 is bolted. The steel node 3 is connected between adjacent inorganic adhesive composite bamboo columns 2, and the steel node 3 is connected to the inorganic adhesive composite bamboo column 2 on the upper side through the connector 5, and is connected to the inorganic adhesive composite bamboo column 2 on the lower side through its own inner filling steel plate 17. The inorganic adhesive composite bamboo column 2 is connected to the inorganic adhesive composite bamboo beam 15 through the steel node 3, the connector 5 and the metal damper 7 to form a composite bamboo frame structure, which can ensure the rigidity and bearing capacity of the main structure during an earthquake.

[0042] As shown in FIG. 3(a) and FIG. 3(b), the metal damper 7 includes a first web 9, a flange 8, a first connecting end plate 11, and an end stiffening rib 10, wherein two first connecting end plates 11 and two flanges 8 are provided, and the two first connecting end plates 11 are parallel to each other. According to the viewing direction, the two flanges 8 are arranged up and down, and the two flanges 8 are connected between the two first connecting end plates 11. The first web 9 is connected between the two flanges 8, and the longitudinal cross-section of the three is I-shaped; according to the direction shown in FIG. 3(a), the left and right sides of the first web 9 are symmetrically provided with end stiffening ribs 10, and the end stiffening ribs 10 are connected to the first connecting end plate 11 and the flange 8 at the same time; according to the direction shown in FIG. 3(b), the end stiffening ribs 10 are connected to the I-shaped structure and are symmetrically distributed relative to the first web 9.

[0043] In this embodiment, the above connection methods are all welding; in order to prevent the brittle failure of the weld at the connection between the flange 8, the first web 9 and the first connecting end plate 11, the end stiffening rib 10 is provided, and according to the stress characteristics of the end of the frame beam 1, the flange 8 adopts a low yield point steel plate so that it yields first under the action of an earthquake, and the metal damper 7 undergoes bending failure.

[0044] As shown in FIG. 4(a) and FIG. 4(b), the connector 5 includes a second connecting end plate 13 and a second web 12, and the second connecting end plate 13 and the second web 12 are connected to form a T-shape, and the second connecting end plate 13 is fitted with its corresponding metal damper 7 or steel node 3; the connector 5 connected to the inorganic adhesive composite bamboo beam 15, its second web 12 is inserted into the inorganic adhesive composite bamboo beam 15, and is connected by bolts; at the same time, it cooperates with gluing to form a bolt-glue mixed connection mode, and the mixed node has a strong bearing capacity and can effectively transmit bending moment and shear force. The inorganic adhesive composite bamboo beam 15 at the connection is strengthened by transverse embedded steel bars 14 to prevent the bamboo material at the connection from splitting and ensure that the inorganic adhesive composite bamboo beam 15 is not damaged under the action of an earthquake. Similarly, the connector 5 connected to the inorganic adhesive composite bamboo column 2, its second web 12 is inserted into the inorganic adhesive composite bamboo column 2, and a bolt-glue mixed connection mode is adopted; and embedded steel bars 14 are also adopted for reinforcement.

[0045] Combination Figure 5 As shown, the steel node 3 includes a node core area 16, a connection section 18 and an inner filling steel plate 17, the inner filling steel plate 17 is connected to the lower side of the node core area 16, the inner filling steel plate 17 is inserted into the inorganic adhesive composite bamboo column 2, and is connected to the inorganic adhesive composite bamboo column 2 by a steel filling plate bolt-adhesive hybrid connection method to prevent the bamboo material from splitting at the connection. Similarly, the connection is also provided with a reinforcement measure of embedded steel bars 14.

[0046] The connecting section 18 is arranged inside the node core area 16. The longitudinal cross section of the connecting section 18 is rectangular and has stiffening ribs inside. The connecting section 18 is connected to the metal damper 7 by bolts. In this embodiment, two transverse stiffening ribs are arranged inside the connecting section 18. Figure 2 As shown, when the steel node 3 is connected to the metal damper 7, the transverse stiffening ribs at the connecting section 18 of the steel node 3 correspond to the flange 8 of the metal damper 7 to ensure the connectivity of force conduction.

[0047] Combination Figure 6 and Figure 7 As shown, the energy-absorbing steel boot 6 includes a steel sleeve 19, an energy-absorbing steel plate 20, a connecting plate 21 and a supporting end plate 22. The shape of the steel sleeve 19 is adapted to the shape of the inorganic adhesive composite bamboo column 2. The steel sleeve 19 is sleeved on the outside of the inorganic adhesive composite bamboo column 2. The steel sleeve 19 is connected to the inorganic adhesive composite bamboo column 2 by bolts. In order to ensure the stiffness and bearing capacity of the foot node of the inorganic adhesive composite bamboo column 2, glue is injected into the gap between the steel sleeve 19 and the inorganic adhesive composite bamboo column 2, and transverse embedded reinforcement 14 is adopted to strengthen the connection.

[0048] A support end plate 22 is installed at the bottom of the steel sleeve 19, and the support end plate 22 is arranged on the foundation 4, and the support end plate 22 is connected to the foundation 4 through anchor bolts. In this embodiment, the foundation 4 is a reinforced concrete foundation 4.

[0049] A plurality of energy-absorbing steel plates 20 are arranged around the steel sleeve 19. In this embodiment, the energy-absorbing steel plates 20 are symmetrically installed on both sides of the steel sleeve 19. The energy-absorbing steel plates 20 are fixed to the steel sleeve 19 by connecting plates 21. The connecting plates 21 are L-shaped and the energy-absorbing steel plates 20 are triangular. The energy-absorbing steel plates 20 and the connecting plates 21 are connected by bolts, which is convenient for replacement after an earthquake.

[0050] All components of the inorganic glue composite bamboo beam 15, inorganic glue composite bamboo column 2, T-shaped connecting piece 5, steel node 3, energy-absorbing steel boot 6, etc. in this embodiment are prefabricated components, and the connecting piece 5 and the inorganic glue composite bamboo beam 15, the connecting piece 5 and the upper inorganic glue composite bamboo column 2, and the steel node 3 and the lower inorganic glue composite bamboo column 2 are connected by steel plate bolt-injection glue connection. The inorganic glue composite bamboo column 2 and the energy-absorbing steel boot 6 are pre-installed, and when the injection glue curing is completed and can bear the force, they are transported to the construction site, and the inorganic glue composite bamboo beam 15 is connected to the metal damper 7 by bolts. The other end of the metal damper 7 is assembled with bolts to form a beam-column node. The splicing of the columns is connected by bolts, and then a frame structure system is formed to improve assembly efficiency.

[0051] The beam-column node of this embodiment adopts a steel node 3, which is connected to a replaceable frame beam 1. The beam end of the frame beam 1 is a metal damper 7. Through reasonable design, the metal damper 7 can be made to yield and break first, thereby improving the initial stiffness of the beam-column node; the column foot node is on the foundation 4 connected to the energy-absorbing steel boot 6, and glue is injected into the gap to improve the integrity and initial stiffness of the node. An energy-absorbing steel plate 20 is added to the side of the energy-absorbing steel boot 6 to improve the bending bearing capacity and energy-absorbing capacity of the column foot node. The frame structure composed of the above-mentioned beam-column node and column foot node has good lateral stiffness, and does not require additional support or filling walls to meet the requirements of the six-story frame structure, while realizing the seismic design requirements of "strong column and weak beam" and "strong node and weak member".

[0052] 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 restorable inorganic adhesive composite bamboo frame structure, characterized in that: include: The frame beam comprises an inorganic adhesive composite bamboo beam and a metal damper, wherein the metal damper is connected to both ends of the inorganic adhesive composite bamboo beam; Inorganic adhesive composite bamboo columns, the inorganic adhesive composite columns are spliced ​​at steel nodes, and the steel nodes are fixed to metal dampers; The energy-absorbing steel boot is installed at the column foot of the inorganic adhesive composite bamboo column at the bottom layer, and the energy-absorbing steel boot is used to be fixed to the foundation; the metal damper and the energy-absorbing steel boot yield during an earthquake to dissipate the earthquake energy.

2. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 1, characterized in that: The metal damper comprises a first connecting end plate, a first web, an end stiffening rib and a flange, wherein the first web is connected between two flanges, and the two first connecting end plates are arranged parallel to each other and connected through the two flanges and the first web; The end stiffening ribs are symmetrically arranged on both sides of the first web, and the end stiffening ribs are welded to the flange and the first connecting end plate as a whole.

3. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 1, characterized in that: The metal damper and the inorganic adhesive composite bamboo beam as well as the steel node and the inorganic adhesive composite bamboo column are connected respectively via connecting pieces.

4. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 3, characterized in that: The connecting member comprises a second connecting end plate and a second web plate, and the second connecting end plate and the second web plate are connected to form a T-shaped structure; The second web is inserted into the inorganic adhesive composite bamboo beam or inorganic adhesive composite bamboo column, and a bolt-adhesive hybrid connection method is adopted; the second connection end plate is bolted to the metal damper or the inorganic adhesive composite bamboo beam or inorganic adhesive composite bamboo column.

5. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 3, characterized in that: The steel node comprises a node core region, one side of the node core region is provided with a connecting section, and the connecting section is connected to the metal damper; An inner filling steel plate is arranged at the lower side of the core area of ​​the node, and the inner filling steel plate is inserted into the inorganic glue composite bamboo column.

6. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 5, characterized in that: The inner filling steel plate is connected to the inorganic adhesive composite bamboo column by bolts and glued together.

7. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 6, characterized in that: The connection between the connecting piece and the inorganic adhesive composite bamboo beam, the connecting piece or the inner filling steel plate and the inorganic adhesive composite bamboo column is respectively provided with embedded reinforcement.

8. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 1, characterized in that: The energy-absorbing steel boot is connected to the foundation via anchor bolts.

9. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 1 or 8, characterized in that: The energy-absorbing steel boot comprises a steel sleeve, an energy-absorbing steel plate and a supporting end plate. The steel sleeve is sleeved on the outside of the inorganic glue composite bamboo column, and the gap between the two is injected with glue. A supporting end plate is installed at the bottom of the steel sleeve, and a plurality of energy-absorbing steel plates are arranged around the steel sleeve.

10. The inorganic adhesive composite bamboo frame structure with restorable function according to claim 9, characterized in that: The energy-absorbing steel plate is fixed to the steel sleeve and the supporting end plate through a connecting plate.

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