CN219732279U - Prefabricated bolted self-returning beam-column node structure - Google Patents

Abstract

The utility model discloses an assembled bolt connection self-resetting beam column node structure, which relates to the technical field of building structure earthquake resistance and comprises the following components: the device comprises a precast concrete beam, a precast concrete column, a plurality of positioning bolts, a plurality of energy consumption pieces and a plurality of resetting pieces, wherein one end of each positioning bolt penetrates through the precast concrete column and can be detachably and fixedly connected with the precast concrete column, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam; one end of the energy consumption piece penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, and the other end of the energy consumption piece is detachably and fixedly connected with the precast concrete beam; one end fixed connection that precast concrete post was kept away from to the one end of piece that resets and precast concrete post, the one side fixed connection that precast concrete post was kept away from to the other end and precast concrete post effectively strengthen the power consumption ability of node structure, reduce the damage and the destruction of structure under the seismic action, and can automatic re-setting.

Description

Prefabricated bolted self-returning beam-column node structure

Technical field

The utility model relates to the field of anti-seismic technology of building structures, in particular to an assembled bolt-connected self-returning beam-column node structure.

Background technique

In order to achieve the purpose of "equivalent to cast-in-place" of the entire structure, traditional prefabricated reinforced concrete beam-column joints usually adopt the method of joint cast-in-place or secondary pouring. However, this method requires a lot of wet work, has the disadvantages of more complex on-site construction, and difficult to control the construction quality, and cannot give full play to the advantages of assembly. In recent years, dry beam-column connection technology represented by bolted connections and welded connections has gradually emerged. A large number of experimental research results show that the existing connection method can ensure the stiffness and bearing capacity of the node connection area, and is reliable in bearing force, but has poor energy consumption. The grouting area is prone to brittle failure under repeated earthquake loads; After being damaged due to other reasons, it will be deformed to a large extent and unable to repair itself. Chinese patent CN108867861A discloses prefabricated assembled concrete beam-column edge nodes with bolts, steel bars and pins. It adopts "dry" connection to form prefabricated concrete frame beam-column nodes. There is no wet operation on site and the installation efficiency is high; the connecting steel bars can effectively transmit tension and pressure. It forms a rigid connection to ensure the mechanical performance of the beam-column connection node. At the same time, the connecting steel bar has no bond in the channel, has good deformation ability, and has high seismic energy dissipation capacity, which can effectively ensure the structural stability of the connection node under earthquake load. performance. However, the connecting steel bars at the edge nodes of the beams and columns cannot be easily replaced. After a period of use, due to their loss, the energy dissipation capacity will be relatively reduced, and the structure is still easily damaged and destroyed under earthquake action; moreover, the structure The beam-column edge nodes do not have related structures that can self-repair. Therefore, there is an urgent need for a beam-column joint structure that can effectively enhance the energy dissipation capacity of the joint structure, reduce the damage and destruction of the structure under earthquake action, and can automatically reset.

Utility model content

The purpose of this utility model is to provide an assembled bolted self-returning beam-column node structure to solve the problems existing in the above-mentioned existing technologies, effectively enhance the energy dissipation capacity of the node structure, and reduce the damage and destruction of the structure under earthquake action. And can automatically reset.

In order to achieve the above purpose, the utility model provides the following solutions:

The utility model provides an assembled bolt-connected self-returning beam-column node structure, which includes: precast concrete beams, precast concrete columns, multiple positioning bolts, multiple energy-consuming parts and multiple reset parts. One end of the positioning bolts runs through The precast concrete column is removably and fixedly connected to the precast concrete column, and the other end is removably and fixedly connected to the middle part of the precast concrete beam; one end of the energy-consuming part penetrates the precast concrete column and is removably fixed to the precast concrete column. The precast concrete column is detachably and fixedly connected, and the other end is detachably and fixedly connected to the precast concrete beam. At least one of the energy-consuming parts is arranged on the top and bottom of the precast concrete beam; the reset part runs through the The precast concrete beam and the precast concrete column, and one end of the reset member is fixedly connected to the end of the precast concrete beam away from the precast concrete column, and the other end is connected to the end of the precast concrete column away from the precast concrete beam. Side fixed connection.

Preferably, a plurality of first steel pipes are provided in the precast concrete beam, and the first steel pipes are used to replace the longitudinal steel bars in the precast concrete beam, and a plurality of second steel pipes are embedded in the precast concrete column, so The first steel pipe and the second steel pipe are arranged correspondingly and communicate with each other, and a reset member is used to pass through a hole in one of the first steel pipe and one of the second steel pipe and the two ends thereof are respectively connected with the precast concrete column. fixedly connected to the precast concrete beam.

Preferably, the restoring components are prestressed tendons and anchors, and the two ends of the prestressed tendons after passing through the channels in the first steel pipe and the second steel pipe are respectively connected with the precast concrete column and the The precast concrete beams are fixedly connected through anchors. The prestressed tendons in the first steel pipe are filled with unbonded micro-expansion material. The prestressed tendons in the second steel pipe are The space between the second steel pipe and the second steel pipe is filled with unbonded micro-expansion material.

Preferably, the precast concrete beam includes a first beam body and a second beam body, the cross-sectional size of the first beam body is larger than the cross-sectional size of the second beam body, and the center line of the first beam body is between The center lines of the second beam bodies coincide with each other, and the parts of the first beam body that are higher and lower than the second beam body are energy-consuming part connecting parts, and the energy-consuming part connecting parts are provided with a plurality of third Three steel pipes, the prefabricated concrete column is embedded with a plurality of fourth steel pipes, the fourth steel pipes are arranged correspondingly and connected with the third steel pipes, and one of the energy-consuming parts passes through one of the fourth steel pipes and one of the four steel pipes. The two rear ends of the third steel pipe are respectively fixed to the energy-consuming component connection part and the precast concrete column.

Preferably, the energy-consuming part includes energy-consuming bolts and a plurality of first fixing nuts, and the two ends of the energy-consuming bolts passing through one of the fourth steel pipes and one of the third steel pipes are respectively connected with the first Fixed nut threaded connection.

Preferably, it also includes a column embedded steel plate and a beam embedded steel plate. The column embedded steel plate is fixedly arranged on the side of the precast concrete column away from the precast concrete beam. The beam embedded steel plate is fixedly arranged on the side of the precast concrete column. On the side of the precast concrete beam close to the precast concrete column, the column embedded steel plate and the beam embedded steel plate are both provided with passages for the positioning bolts, the energy consumption parts and the reset parts to pass through. hole.

Preferably, it also includes a plurality of side frame shells and a plurality of second fixing nuts. Each side frame shell is fixedly connected to the middle part of the beam embedded steel plate on the side away from the precast concrete column. The beam is provided with a groove for placing the side frame shell, the side frame shell is provided with an operating opening, and the positioning bolt passes through the beam's embedded steel plate and extends into the side frame shell with the The second fixing nut is threaded and fixed.

Compared with the existing technology, the utility model achieves the following technical effects:

The utility model provides an assembled bolt-connected self-returning beam-column node structure. By arranging energy-consuming parts, the plastic behavior under earthquake action is concentrated on the energy-consuming parts, and the energy-consuming parts can be disassembled and replaced, thereby improving the post-earthquake repair ability and repairing Convenient and efficient; it meets the seismic toughness requirements under multiple earthquake levels by controlling the damage sequence. In addition, automatic reset is achieved by setting reset parts to reduce the residual displacement of the structure under earthquakes and improve the self-reset capability of beam-column joints while simultaneously resetting the parts. Compared with prefabricated concrete beams and columns, it can produce relative slippage and has good energy consumption capacity; all components can be prefabricated in the factory, and only need to be assembled and prestressed on site, reducing labor costs and environmental pollution, and is in line with the green and environmental protection of prefabricated buildings. The development concept of high efficiency and energy saving.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the assembled bolt-connected self-returning beam-column node structure provided by the present utility model.

Figure 2 is a front view of the assembled bolt-connected self-returning beam-column joint structure provided by the present utility model.

Figure 3 is a schematic structural diagram of a prefabricated concrete beam in a self-returning beam-column joint structure provided by an assembled bolt connection provided by the present utility model.

Figure 4 is a schematic diagram of a prefabricated concrete column in a self-returning beam-column node structure provided by the utility model.

Figure 5 is a schematic structural diagram of the beam embedded steel plate and side frame shell of the precast concrete beam.

In the picture: 1. Precast concrete beam; 2. Precast concrete column; 3. Anchor; 4. Second fixing nut; 5. Third steel pipe; 6. Energy-consuming bolt; 7. First steel pipe; 8. Prestressed tendon ; 9. Column embedded steel plate; 10. Side frame shell; 11. Beam embedded steel plate; 12. Positioning bolt; 13. Second steel pipe; 14. Fourth steel pipe; 15. First fixing nut.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

The purpose of this utility model is to provide an assembled bolted self-returning beam-column node structure to solve the problems existing in the above-mentioned existing technologies, effectively enhance the energy dissipation capacity of the node structure, and reduce the damage and destruction of the structure under earthquake action. And can automatically reset.

In order to make the above-mentioned purposes, features and advantages of the present utility model more obvious and easy to understand, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes.

Embodiment 1

This embodiment provides an assembled bolt-connected self-returning beam-column node structure, as shown in Figures 1 to 5, including: a precast concrete beam 1, a precast concrete column 2, a plurality of positioning bolts 12, a plurality of energy-consuming parts and a plurality of One end of the positioning bolt 12 penetrates the precast concrete column 2 and is detachably fixedly connected to the precast concrete column 2, and the other end is detachably fixedly connected to the middle part of the precast concrete beam 1; one end of the energy-consuming part penetrates the precast concrete column 2 and is removably and fixedly connected to the precast concrete column 2, and the other end is removably and fixedly connected to the precast concrete beam 1. At least one energy-consuming component is arranged on the top and bottom of the precast concrete beam 1; the reset component penetrates the precast concrete beam 1 and Precast concrete column 2, and one end of the reset piece is fixedly connected to the end of the precast concrete beam 1 away from the precast concrete column 2, and the other end is fixedly connected to the side of the precast concrete column 2 away from the precast concrete beam 1. By setting the energy-consuming parts and consuming The energy-consuming parts are components with low yield strength, which can make the plastic behavior concentrated in the energy-consuming parts under earthquake action, and the energy-consuming parts can be disassembled and replaced, which improves the post-earthquake repair ability, making the repair convenient and efficient; it can meet multiple earthquake levels by controlling the damage sequence. Under the seismic toughness requirements, in addition, by setting the reset parts, automatic reset can be achieved by setting the reset parts, reducing the residual displacement of the structure under earthquakes, improving the self-reset ability of the beam-column joints, and at the same time, the reset parts can produce relative slip relative to the precast concrete beams and columns. It has good energy consumption capacity; all components can be prefabricated in the factory, and only need to be assembled and prestressed on site, reducing labor costs and environmental pollution, and conforming to the development concept of green, environmentally friendly, efficient and energy-saving prefabricated buildings.

In a preferred embodiment, a plurality of first steel pipes 7 are provided in the precast concrete beam 1. The first steel pipes 7 are used to replace the longitudinal steel bars in the precast concrete beam 1, thereby reducing the amount of steel bars used in the precast concrete beam 1. Precast concrete A plurality of second steel pipes 13 are provided in the position of the column 2 corresponding to the first steel pipe 7 and are connected with the first steel pipe 7. A reset member is used to pass through the last two holes in the first steel pipe 7 and the second steel pipe 13. The ends are fixedly connected to the precast concrete column 2 and the precast concrete beam 1 respectively, which saves the amount of steel bars and reduces the weight of the precast concrete beam. The unbonded prestressed bars 8 assume the stress-bearing function of the original stress-bearing longitudinal bars, and the thin-walled steel pipe channels bear the structural function of the original stress-bearing longitudinal bars. The self-resetting function is provided for the nodes without reducing the original performance of the structure.

In a preferred embodiment, the restoring components are prestressed tendons 8 and anchors 3. After the prestressed tendons 8 pass through the holes in the first steel pipe 7 and the second steel pipe 13, the two ends are respectively connected with the precast concrete columns 2 and the precast concrete columns 2. The concrete beam 1 is fixedly connected through the anchor 3. The first steel pipe 7 and the second steel pipe 13 are filled with unbonded micro-expansion material to ensure that the prestressed tendons 8 can slide freely in the reserved channels. The number of the prestressed tendons 8 and The tensile control stress is determined based on calculations to ensure that the prestressed tendons 8 remain elastic under rare earthquakes with corresponding fortification intensity. The prestressed tendons 8 are unbonded prestressed tendons 8 , and the unbonded prestressed tendons 8 are wrapped for anti-corrosion. Grease and polyethylene sheathed non-bonded high strength low relaxation steel strand.

In a preferred embodiment, the precast concrete beam 1 includes a first beam body and a second beam body. The cross-sectional size of the first beam body is larger than the cross-sectional size of the second beam body, and the center line of the first beam body is in line with the second beam body. The center lines of the beam bodies coincide. The parts of the first beam body that are higher and lower than the second beam body are the energy-consuming part connecting parts. The energy-consuming part connecting parts are equipped with appropriate structural steel bars. The energy-consuming part connecting parts are provided with multiple A third steel pipe 5 is provided on the precast concrete column 2 at a position corresponding to the third steel pipe 5, and the fourth steel pipe 14 is connected to the third steel pipe 5. An energy dissipating component passes through a fourth steel pipe 14 and The two ends of a third steel pipe 5 are respectively fixed to the energy-consuming part connection part and the precast concrete column 2. The precast concrete beam has an enlarged cross-section at the connection, so the connection node will not be damaged before the precast concrete integral member, which is in line with the "strong" Node, weak component" concept.

In a preferred embodiment, the energy-consuming parts include energy-consuming bolts 6 and a plurality of first fixing nuts 15. After the energy-consuming bolts 6 pass through a fourth steel pipe 14 and a third steel pipe 5, the two ends are respectively first fixed. The nut 15 is threaded for fixed connection. The energy-consuming bolt 6 is a material with low yield strength. The energy-consuming bolt 6 is the first to undergo yield deformation and consume energy. The inner diameter of the third steel pipe 5 and the fourth steel pipe 14 is larger than the outer diameter of the energy-consuming bolt 6 by 2- 3mm, and fill the third steel pipe 5 and the fourth steel pipe 14 with unbonded micro-expansion material to ensure that the steel bars can slide freely in the tunnel and be installed or disassembled relatively easily.

In a preferred embodiment, the assembled bolt-connected self-returning beam-column joint structure also includes column embedded steel plates 9 and beam embedded steel plates 11. The column embedded steel plates 9 are fixedly disposed on the precast concrete columns 2 away from the precast concrete beams 1. On one side, the beam embedded steel plate 11 is fixedly arranged on the side of the precast concrete beam 1 close to the precast concrete column 2. The column embedded steel plate 9 and the beam embedded steel plate 11 are provided with positioning bolts 12, energy dissipating parts and reset parts. Through the through holes, the column embedded steel plate 9 can improve the load-bearing capacity of the reinforced concrete precast.

In a preferred embodiment, the assembled bolt-connected self-returning beam-column joint structure also includes a plurality of side frame shells 10 and a plurality of second fixing nuts 4. Each side frame shell 10 and the beam embedded steel plate 11 are far away from the prefabricated steel plate 11. The middle part of one side of the concrete column 2 is fixedly connected, and the positioning bolt 12 passes through the beam's embedded steel plate 11 and extends into the side frame shell 10 and then is threaded and fixed with the second fixing nut 4. The precast concrete beam is provided with a side frame The groove of the shell, the side frame shell is provided with an operating opening, and the operator extends the operating tool into the operating opening to fix or remove the positioning bolt. The side frame shell 10 leaves a working space for the installation of the positioning bolt 12, and the positioning bolt 12 can ensure The nodes are positioned accurately while providing shear bearing capacity.

Embodiment 2

This embodiment also provides a construction method for a self-returning beam-column node structure connected by prefabricated bolts as described in Embodiment 1, which includes the following steps:

Processing and fabrication of precast concrete beams 1;

Processing and fabrication of precast concrete columns 2;

Install positioning bolts 12 to connect and fix the precast concrete beam 1 and the precast concrete column 2. In order to ensure the accuracy and stability of the above hoisting, necessary temporary supports should be used;

Install the reset piece, and fix the two ends of the reset piece through the precast concrete beam 1 and the precast concrete column 2 with the precast concrete beam 1 and the precast concrete column 2 respectively;

Install the energy-consuming part, one end of the energy-consuming part penetrates the precast concrete column 2 and is detachably fixedly connected to the precast concrete column 2, and the other end is detachably fixedly connected to the precast concrete beam 1.

After a major earthquake occurs, the replaceable energy-consuming bolts 6 are removed and new replaceable energy-consuming bolts 6 are installed to restore the seismic performance of the structure.

Specific examples are used in the present utility model to illustrate the principles and implementation modes of the present utility model. The description of the above embodiments is only used to help understand the method and the core idea of the present utility model; at the same time, for those of ordinary skill in the art , according to the idea of the present utility model, there will be changes in the specific implementation and application scope. In summary, the contents of this specification should not be construed as limitations of the present invention.

Claims (7)

1. The utility model provides an assembled bolted connection is from beam column node structure that resets which characterized in that: comprising the following steps:

the concrete beam is prefabricated and the concrete beam is arranged in the prefabricated concrete beam,

the concrete column is prefabricated,

one end of each positioning bolt penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam;

the energy dissipation components penetrate through the precast concrete columns at one end and are detachably and fixedly connected with the precast concrete columns, the precast concrete beams can be detachably and fixedly connected at the other end, and at least one energy dissipation component is arranged at the top and the bottom of each precast concrete beam; and

the restoring pieces penetrate through the precast concrete beam and the precast concrete column, one end of each restoring piece is fixedly connected with one end of the precast concrete beam, which is far away from the precast concrete column, and the other end of each restoring piece is fixedly connected with one side of the precast concrete column, which is far away from the precast concrete beam.

2. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: the precast concrete beam is pre-buried to have a plurality of first steel pipes, precast concrete post pre-buried has a plurality of second steel pipes, first steel pipe with the second steel pipe corresponds the setting and communicates, one reset piece is used for passing one behind the pore in first steel pipe and the second steel pipe both ends respectively with precast concrete post with precast concrete beam fixed connection.

3. The fabricated bolted self-resetting beam-column node structure of claim 2, wherein: the reset piece is a prestressed rib and an anchorage device, two ends of the prestressed rib after penetrating through the pore canal in the first steel pipe and the second steel pipe are respectively fixedly connected with the precast concrete column and the precast concrete beam through the anchorage device, an unbonded micro-expansion material is filled between the prestressed rib in the first steel pipe and the first steel pipe, and an unbonded micro-expansion material is filled between the prestressed rib in the second steel pipe and the second steel pipe.

4. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: the precast concrete roof beam includes first roof beam body and second roof beam body, the cross-sectional dimension of first roof beam body is greater than the cross-sectional dimension of second roof beam body, just the central line of first roof beam body with the central line coincidence of second roof beam body, be higher than on the first roof beam body with be less than the part of second roof beam body is power consumption spare connecting portion, power consumption spare connecting portion are provided with a plurality of third steel pipes, precast concrete post pre-buried has a plurality of fourth steel pipes, the fourth steel pipe with the third steel pipe corresponds the setting and communicates, one power consumption spare pass one fourth steel pipe and one both ends behind the third steel pipe respectively with power consumption spare connecting portion with precast concrete post is fixed.

5. The fabricated bolted self-righting beam column node structure of claim 4, wherein: the energy consumption piece comprises an energy consumption bolt and a plurality of first fixing nuts, and two ends of the energy consumption bolt, which penetrate through one fourth steel pipe and one third steel pipe, are respectively and fixedly connected with the first fixing nuts through threads.

6. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: still include post pre-buried steel sheet and pre-buried steel sheet of roof beam, post pre-buried steel sheet fixed set up in precast concrete column keeps away from one side of precast concrete roof beam, the pre-buried steel sheet of roof beam fixed set up in precast concrete roof beam is close to one side of precast concrete column, post pre-buried steel sheet with all be provided with on the pre-buried steel sheet of roof beam be used for positioning bolt the power consumption piece with the through-hole that the piece passed resets.

7. The fabricated bolted self-righting beam column node structure of claim 6, wherein: the side wall frame comprises a precast concrete column and is characterized by further comprising a plurality of side wall frame shells and a plurality of second fixing nuts, wherein each side wall frame shell is fixedly connected with the middle part of one side of the precast concrete column away from the beam embedded steel plate, a groove for placing the side wall frame shells is formed in the precast concrete beam, the side wall frame shells are provided with operation openings, and the positioning bolts penetrate through the beam embedded steel plate and extend into the side wall frame shells to be fixedly connected with the second fixing nuts through threads.