CN217840299U - Assembled replaceable energy-consumption hybrid connection node - Google Patents

Abstract

The utility model discloses an assembled replaceable energy-consuming hybrid connecting node, which comprises a steel pipe concrete, a precast concrete beam and an energy-consuming connecting piece; the steel pipe concrete comprises high-strength concrete and a steel pipe, and the high-strength concrete is poured into the steel pipe to form the steel pipe concrete; column end H-shaped steel is arranged on the outer side of the steel tube concrete, and partial concrete is poured on the side face of the column end H-shaped steel; the precast concrete beam comprises precast concrete, precast H-shaped steel and longitudinal bars; the longitudinal bars are fixed on the flange part of the prefabricated H-shaped steel, and a prefabricated concrete beam is formed after the prefabricated concrete is poured; h-shaped steel webs are arranged on the prefabricated H-shaped steel and the column end H-shaped steel and connected through pin shafts; the energy-consuming connecting piece is connected and arranged on the column end H-shaped steel and the prefabricated H-shaped steel through the high-strength bolt. The construction efficiency, the section bearing capacity and the energy consumption capacity of the fabricated building can be obviously improved.

Description

A prefabricated replaceable energy consumption hybrid connection node

technical field

The utility model belongs to the technical field of structural engineering, in particular to an assembled replaceable energy-consuming hybrid connection node.

Background technique

The components used in prefabricated buildings need to be prefabricated in the factory in advance, and can be installed in a short time after simple treatment at the construction site, which greatly optimizes the construction period of the building and reduces noise, pollution, and maintenance during on-site installation. and high cost issues. However, in the prefabricated type, the connection nodes are crucial to the overall performance and seismic performance of the building. Unreasonable node design and complicated construction procedures may make the installation between the components weak, resulting in serious damage to the building under the action of an earthquake Even collapse issues.

At present, common prefabricated buildings mainly include concrete structures, steel structures, and modern wooden structures. Traditional prefabricated concrete structures often use sleeve slurry connection or mechanical connection, which requires high construction precision and difficult to guarantee construction quality; In common prefabricated steel structures, problems such as large steel consumption, high cost, and fire prevention and rust prevention are unavoidable; modern wood structure buildings have problems such as material corrosion and insufficient bearing capacity, which are difficult to apply to high-rise buildings. Buildings often suffer local damage under the action of earthquakes. Due to the generation of plastic hinges on the components, the surface of the components presents large cracks and deformations, which are difficult to repair by simple means. Poor energy dissipation capacity is not conducive to improving the earthquake resistance of buildings.

The traditional concrete-filled steel tube column-concrete beam adopts a completely wet connection scheme, which has high requirements for construction quality, long maintenance period, and difficulty in improving construction efficiency, and it is difficult to guarantee the overall performance and seismic performance of the structure with this structural form of frame.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a prefabricated replaceable energy-consuming hybrid connection node, which can significantly improve the construction efficiency, section bearing capacity and energy consumption capacity of prefabricated buildings. The utility model can effectively improve the traditional cast-in-place or fully assembled steel pipe concrete-concrete beam joints caused by insufficient material strength, such as "thick beams and fat columns", excessive residual deformation, low construction efficiency, poor overall performance and seismic performance, etc. .

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

A prefabricated replaceable energy-dissipating hybrid connection node, including steel pipe concrete, prefabricated concrete beams and energy-dissipating connectors;

The steel pipe concrete includes high-strength concrete and steel pipes, and high-strength concrete is poured into the steel pipes to form steel pipe concrete; the outside of the steel pipe concrete is provided with column-end H-shaped steel, and part of the concrete is poured on the side of the column-end H-shaped steel;

The prefabricated concrete beam includes prefabricated concrete, prefabricated H-shaped steel and longitudinal reinforcement;

The longitudinal reinforcement is fixed on the flange of the prefabricated H-shaped steel, and the prefabricated concrete beam is formed after pouring the prefabricated concrete;

Both the prefabricated H-shaped steel and the column-end H-shaped steel are provided with H-shaped steel webs, and the H-shaped steel webs are connected by pins;

The energy-dissipating connecting piece connects the H-shaped steel at the column end and the prefabricated H-shaped steel through high-strength bolts.

Preferably, the outer side of the concrete filled steel pipe is provided with a ring plate, and the H-shaped steel at the end of the column is fixed on the ring plate.

Further, the ring plate is welded to the outer surface of the steel pipe.

Preferably, the middle part of the energy dissipation connector is provided with a plurality of circular holes, and both sides of the middle part are provided with arc-shaped notches.

Preferably, the interior of the concrete-filled steel tube is provided with a through-center longitudinal bar, and the through-center longitudinal bar passes through the flange of the H-shaped steel at the end of the steel tube concrete connecting column.

Preferably, the longitudinal reinforcement is fixed and welded to the flange of the prefabricated H-shaped steel through stirrups.

Preferably, the strength grade of the steel pipe is not lower than Q460.

Preferably, the strength grade of the high-strength concrete is not lower than C60.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model provides an assembled replaceable energy-consuming hybrid connection node, which can protect the beam under the action of an earthquake by setting hinges between the prefabricated H-shaped steel and the H-shaped steel at the end of the column through pin shafts and setting replaceable energy-consuming connectors. The column members are not damaged, and the energy dissipation capacity of the nodes is enhanced through the plastic deformation of the energy-dissipating connectors; after the energy-dissipating connectors are damaged under the action of an earthquake, they can be replaced in time, which is conducive to the implementation of the repairable scheme for moderate earthquakes, and in During the installation process, the energy-dissipating connector can also be used as an external corbel. In the process of hoisting the test piece, the concrete beam can be lapped on the surface of the energy-dissipating connector, and then the mechanical equipment can carry out the hoisting work of the next component. It is beneficial to improve the construction speed of hoisting and simplify the construction process. The utility model can be provided with steel bars and concrete post-cast sections on the upper part of the H-shaped steel and concrete beams, which is beneficial to the installation of prefabricated floor slabs, and meets the requirements of modern green prefabricated building construction while reducing the construction period and on-site pouring process.

Furthermore, the connecting nodes adopt Q690 high-strength thin-walled square concrete-filled steel pipe columns. The application of high-strength materials can significantly enhance the restraint effect and buckling resistance of the steel pipes, and the self-compacting concrete poured inside is conducive to improving the compactness of the steel pipes during the pouring process;

Further, the longitudinal reinforcement of the prefabricated concrete beam is welded to the flange surface of the H-shaped steel, and the stirrups are used to fix and weld them together, and a steel bar with a hook is arranged on the surface of the web to improve the bonding performance between the web and the concrete .

Furthermore, the structural form of the energy-dissipating connector is made of a circular hole, and an arc-shaped groove is opened on the side, which is more in line with the force transmission path of the connector. The weak position in the middle is conducive to the plastic development of the steel plate. The increase of the load at the connector is avoided, and the protection component is not subjected to excessive load.

Furthermore, multiple rows of steel bars are connected inside the prefabricated concrete-filled steel tube column, ring plates are set on the outer surface, and concrete is poured to protect the steel bars from corrosion, and to improve the overall performance of the steel tube concrete column and the external prefabricated H-shaped steel, ensuring that the beam The load from the end can be transferred to the core concrete, reducing the stress concentration and local tearing on the surface of the high-strength thin-walled steel pipe.

Furthermore, the setting of through-center longitudinal reinforcement is conducive to improving the overall performance of the core area of the joint and avoiding problems such as uncoordinated force transmission between beams and columns.

Description of drawings

Figure 1 is a schematic diagram of an assembled replaceable energy-consuming hybrid connection node;

Figure 2 is a schematic diagram of the connection structure of the replaceable energy-consuming hybrid connection node;

Fig. 3 is a schematic diagram of the prefabricated part of the steel pipe concrete column;

Fig. 4 is a schematic diagram of the connection part of the precast concrete beam;

Figure 5 is a schematic diagram of the internal structure of the steel tube concrete column.

In the drawings: high-strength concrete 1; steel pipe 2; ring plate 3; precast concrete 4; 11; column end H-shaped steel 12; center-piercing longitudinal reinforcement 13; high-strength bolts 14.

Detailed ways

The utility model will be further described in detail below in conjunction with specific embodiments, which are explanations of the utility model rather than limitations.

Example

The utility model provides an assembled replaceable energy-consuming hybrid connection node, which can meet the overall performance and anti-seismic performance between beams and columns under the condition of quickly hoisting beam-column components, and can be quickly replaced after damage.

An assembled replaceable energy-dissipating hybrid connection node is composed of a high-strength thin-walled square steel tube concrete column, a prefabricated concrete beam, an outsourcing steel corbel and a connection device. The high-strength thin-walled square concrete-filled steel tube is composed of steel tubes 2 and core high-strength concrete 1 poured into the interior; the prefabricated concrete beams are prefabricated in batches in the factory, and the connection of the joints can be completed by on-site lap joints and installation of high-strength bolts 14 and pins 5 .

The steel pipe 2 of the high-strength square concrete-filled steel tube column has a strength grade not lower than Q460, and the core high-strength concrete 1 is characterized by a strength grade not lower than C60.

The whole beam of the precast concrete beam is completely prefabricated in the factory, and the prefabricated H-shaped steel 8 and the thickened H-shaped steel web 9 are installed at the end of the beam, and the longitudinal reinforcement 10 and stirrup 11 of the beam are welded to the wing edge, followed by pouring of precast concrete 4. In order to simplify the construction process, a high-strength bolt 14 is used to fix an energy-dissipating connector 6 on the top of the H-shaped steel 8 in advance.

The center column of the prefabricated high-strength square steel tube concrete column is completely prefabricated in the factory, mainly composed of core high-strength concrete 1, steel pipe 2, ring plate 3, energy-dissipating connector 6 and column-end H-shaped steel 12. The ring plate 3 needs to be welded to the surface of the steel pipe 2 by welding technology, the H-shaped steel 12 at the end of the column is also connected to the ring plate 3 by welding, and the energy-dissipating connector 6 at the bottom is connected by high-strength bolts 14 . In addition, some concrete 7 is poured on the side surface of the H-shaped steel 12 at the end of the column to avoid local buckling of the steel flange.

There are three circular holes in the middle of the energy-dissipating connector 6, and the edge of the plate is also weakened by arcs. The effective cross-sectional area of the middle part of the weakened plate can make the local steel quickly enter the yield strength, and thus enter the plastic deformation stage. The rotation of the pin 5 provides a plastic hinge for the precast concrete beam, and the plastic deformation of the steel can provide better Energy consumption capacity. Moreover, the stress of the steel that enters the plastic stage will not increase significantly, and the stable stress state can also avoid the unlimited increase of the load on the core area of the joint, thereby protecting the core area of the joint and more conducive to the realization of "strong joints". Weak component" design goal. In addition, the energy-dissipating connector 6 also meets the requirement of being replaceable. If it is damaged under the action of an earthquake, the energy-dissipating connector 6 can be replaced on site by dismantling the high-strength bolt 14, which is conducive to the realization of "moderate earthquake repairable" seismic design goals.

The internal structure of the prefabricated high-strength square steel tube concrete column adopts a plurality of core-piercing longitudinal bars 13 passing through the steel pipe 2, and is welded to the inner surface of the flange of the H-shaped steel 12 at the column end. The setting of the center-piercing longitudinal reinforcement 13 is conducive to improving the overall performance of the joint core area and avoiding problems such as uncoordinated force transmission between beams and columns. In order to protect the outer longitudinal reinforcement from erosion, some concrete 7 is poured on the side of the H-shaped steel 12 at the column end. The existence of the longitudinal reinforcement 13 also ensures good bonding between the concrete 7 and the H-shaped steel 12 at the column end. performance, it is beneficial for both to work together.

The construction sequence of the utility model is that the prefabricated high-strength square steel pipe concrete column is erected on site, and then the prefabricated concrete beam is hoisted and placed on the replaceable energy-consuming connection 6 at the bottom of the column end, and then other components can be hoisted without affecting the hoisting machinery usage efficiency. When it needs to be completely installed, pass the pin shaft 5 through the H-shaped steel 12 at the column end and the prefabricated H-shaped steel 8, and fix the pin shaft with an ear plate so that it can rotate while bearing the shear force at the node. In addition, it is also necessary to fix the energy-dissipating connectors 6 at the end of the column and the end of the beam with high-strength bolts 14 . The utility model is suitable for structures that require high construction speed, high mechanical utilization rate, and high structural overall performance and seismic performance.

The new connection node of the utility model adopts Q690 high-strength thin-walled square concrete-filled steel tube column. The application of high-strength materials can significantly enhance the restraint effect and buckling resistance of the steel tube, and the self-compacting concrete poured inside is conducive to improving the compactness of the steel tube pouring process. sex;

The utility model welds the longitudinal reinforcement of the prefabricated concrete beam on the surface of the flange of the H-shaped steel, uses stirrups to fix and weld them together, and arranges steel bars with hooks on the surface of the web to improve the bonding performance between the position of the web and the concrete ;

The utility model arranges multiple rows of steel bar connections inside the prefabricated steel tube concrete column, sets ring plates on the outer surface, and pours concrete to protect the steel bars from corrosion, and can improve the overall performance of the steel tube concrete column and the external prefabricated H-shaped steel, ensuring that the beam The load from the end can be transferred to the core concrete, reducing the surface stress concentration and local tearing of high-strength thin-walled steel pipes;

The utility model is provided with a hinge between the prefabricated H-shaped steel and the H-shaped steel end of the prefabricated concrete, and is provided with a replaceable energy-consuming connection device. Plastic deformation of parts, enhance the energy dissipation capacity of nodes;

After the energy-consuming connector of the utility model is damaged under the action of an earthquake, it can be replaced in time, which is beneficial to the implementation of the repairable scheme for moderate earthquakes, and during the installation process, the energy-consuming connector can also be used as an external corbel to hoist the test piece During the process, the concrete beam can be lapped on the surface of the energy-dissipating connector, and then the mechanical equipment can carry out the hoisting work of the next component, which is conducive to improving the construction speed of hoisting and simplifying the construction process.

The structural form of the energy-dissipating connector of the utility model is made of a circular opening, and an arc-shaped groove is opened on the side, which is more in line with the force transmission path of the connector, and the weak position in the middle is conducive to the plastic development of the steel plate. The increase of the load at the connector is avoided, and the protection component is not subjected to excessive load.

The utility model can be provided with steel bars and concrete post-cast sections on the upper part of the H-shaped steel and concrete beams, which is beneficial to the installation of prefabricated floor slabs, and meets the requirements of modern green prefabricated building construction while reducing the construction period and on-site pouring process.

The installation of an assembled replaceable energy-consuming hybrid connection node of the utility model includes the following processes, which are mainly divided into: factory prefabricated parts, on-site erection of steel pipe concrete columns, hoisting of precast concrete beams, and on-site overall installation.

Factory prefabricated test pieces

When the factory manufactures prefabricated concrete beams, the prefabricated H-shaped steel 8 is installed at the end of the beam, and the prefabricated H-shaped steel 8 is welded through the longitudinal reinforcement 10 and stirrup 11 to ensure that the load on the beam is transmitted to the prefabricated H-shaped steel 8, followed by pouring precast concrete4. In order to simplify the construction process, a high-strength bolt 14 is used to fix an energy-dissipating connector 6 on the top of the H-shaped steel 8 in advance. When the factory prefabricates the high-strength square concrete-filled steel tube column, the steel tube 2 is first erected, and the hole is opened at the position where the longitudinal bar 13 is set. The protruding part is welded to the surface of the ring plate 3, and then the core high-strength concrete 1 and part of the concrete 7 are poured, and the high-strength bolts 14 are tightened to fix the energy-dissipating connector 6 at the bottom to the H-shaped steel 12 at the end of the column.

Concrete-filled steel tube columns erected on site

The concrete-filled steel tube columns made in the factory are hoisted to the foundation on site, and the bottom of the concrete-filled steel tube columns can be fixed with high-strength bolts.

Hoisting of prefabricated (prestressed) concrete beams

Transport the prefabricated concrete beam components from the factory to the construction site for hoisting, place them on the surface of the energy-dissipating connector 6, and quickly pass the pin shaft 5 through the H-shaped steel 12 at the column end and the prefabricated H-shaped steel 8 to prevent it from being subjected to large Vertical loads cause bending.

On-site overall installation

The lug plate is used to fix the pin shaft so that it can rotate while bearing the shear force of the node, and the energy-dissipating connector 6 at the end of the column and the end of the beam is fixed with high-strength bolts 14 to realize joint force transmission between the beam and the column.

An assembly-type replaceable energy-consuming hybrid connection node of the utility model can improve construction efficiency by adopting a fully-assembled installation, the connection mode of the pin shaft can improve the use efficiency of the machine, and the setting of the energy-dissipating connector can ensure that the node or frame structure It has good anti-seismic performance and achieves the goal of being repairable.

The high-strength steel and high-strength concrete used in high-strength thin-walled square steel tube concrete can overcome the problem of excessive cross-section caused by insufficient strength of traditional materials, and the high-strength steel has a greater constraint effect on the core concrete, which can give full play to the bearing capacity of high-strength materials and help reduce construction materials. Problems such as high use and construction costs. This kind of node has a pin connection form, which can realize convenient construction after rapid hoisting, and improve the construction efficiency of on-site machinery. The force transmission mode of ring plate-steel plate-longitudinal reinforcement is set in the core area of the joint, which is conducive to improving the overall performance of the structure. The prefabricated concrete beams are equipped with energy-dissipating connectors, which is beneficial to improve the seismic performance of the frame.

The assembly-type replaceable energy-consuming hybrid connection node provided by the utility model meets the assembly rate requirements of today's assembly-type structure construction, and can effectively overcome the traditional cast-in-place or fully assembled steel pipe concrete column-concrete beam section design. Low bearing capacity, low construction efficiency, long maintenance period and poor seismic performance. The new cross-section form and joint construction scheme can effectively improve the construction efficiency and structural performance of the new hybrid structure of CFST columns and precast concrete beams, and it has great application in modern civil buildings, industrial buildings, special buildings and other important multi-storey buildings. Good economic benefits and technical advantages.

The utility model provides an assembled replaceable energy-consuming hybrid connection node, which can overcome the problem of excessive cross-section caused by insufficient strength of traditional materials, and the high-strength steel has a relatively large constraint effect on the core concrete, which can fully exert the bearing capacity of high-strength materials , help to reduce the use of building materials and excessive construction costs and other issues.

Claims (8)

1. An assembled replaceable energy-consuming hybrid connecting node is characterized by comprising concrete filled steel tubes, a precast concrete beam and an energy-consuming connecting piece (6);

the steel tube concrete comprises high-strength concrete (1) and a steel tube (2), and the high-strength concrete (1) is poured into the steel tube (2) to form the steel tube concrete; column end H-shaped steel (12) is arranged on the outer side of the steel tube concrete, and partial concrete (7) is poured on the side surface of the column end H-shaped steel (12);

the precast concrete beam comprises precast concrete (4), precast H-shaped steel (8) and longitudinal bars (10);

the longitudinal bars (10) are fixed at the flange part of the prefabricated H-shaped steel (8), and the prefabricated concrete beam is formed after the prefabricated concrete (4) is poured;

h-shaped steel webs (9) are arranged on the prefabricated H-shaped steel (8) and the column end H-shaped steel (12), and the H-shaped steel webs (9) are connected through a pin shaft (5);

the energy-consuming connecting piece (6) is connected with the column end H-shaped steel (12) and the prefabricated H-shaped steel (8) through high-strength bolts (14).

2. An assembled replaceable energy consumption hybrid connection node according to claim 1, characterized in that the outer side of the concrete filled steel tube is provided with a ring plate (3), and the column end H-shaped steel (12) is fixed on the ring plate (3).

3. An assembled replaceable dissipative hybrid connection node according to claim 2, wherein the ring plate (3) is welded to the outer surface of the steel tube (2).

4. The assembled replaceable energy-consuming hybrid connection node as claimed in claim 1, wherein the energy-consuming connection member (6) is provided with a plurality of circular holes at a middle portion, and arc-shaped notches are formed at two sides of the middle portion.

5. The fabricated replaceable energy-consuming hybrid connecting joint as claimed in claim 1, wherein the concrete-filled steel tube is internally provided with a through longitudinal rib (13), and the through longitudinal rib (13) penetrates through a flange part of the H-shaped steel (12) at the end of the concrete-filled steel tube connecting column.

6. The fabricated replaceable energy consumption hybrid connection node as claimed in claim 1, wherein the longitudinal ribs (10) are fixed and welded to the flange part of the prefabricated H-shaped steel (8) through stirrups (11).

7. An assembled replaceable energy consuming hybrid connection node according to claim 1, wherein the steel pipe (2) has a strength rating of no less than Q460.

8. An assembled replaceable energy dissipating hybrid connection node according to claim 1, characterized in that the strength grade of the high strength concrete (1) is not lower than C60.

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