CN211621950U

CN211621950U - Energy dissipation and shock absorption node applied to assembly type concrete frame structure

Info

Publication number: CN211621950U
Application number: CN201922193264.4U
Authority: CN
Inventors: 苏毅; 王枫琦; 邹俊; 孙珺; 张冲
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-10-02
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses an energy dissipation shock attenuation node for assembled concrete frame structure, belong to building structure technical field and structure shock attenuation field, this node is articulated node, by the steel connecting plate, round pin axle and backing plate are constituteed, the steel connecting plate can use the round pin axle to rotate as the centre of a circle, the deformability of the node of increase, be provided with polytetrafluoroethylene between backing plate and the steel plate, it is impaired to prevent the node friction, energy dissipation damping device is installed to round pin axle top and bottom, metal rubber is main shock attenuation component, metal rubber places in the bush, be provided with the stripper plate on the roof beam, the part energy that the earthquake produced is consumed in the friction between accessible stripper plate extrusion metal rubber and bush. The utility model discloses simple structure, each part and accessory all can be prefabricated in the mill, are convenient for change, and is economical reasonable, and absorbing protecting effect is better, and factor of safety is higher, and structural durability is good, can use for a long time.

Description

Energy dissipation and shock absorption node applied to assembly type concrete frame structure

Technical Field

The invention relates to the technical field of building structures and the field of structural shock absorption, in particular to an energy dissipation and shock absorption node applied to an assembled concrete frame structure.

Background

The earthquake is a disaster with great destructiveness, tsunami can be caused by strong earthquake in the seabed or coastal areas, secondary disasters such as landslide, collapse, ground cracks and the like can be caused by strong earthquake in continental areas, and the life of human beings is seriously damaged. Therefore, it is important to improve the earthquake resistance of the building.

The assembled structure is one of the important directions for the development of building structures in China, and has the advantages of short construction period, low construction strength, high mechanization degree, good heat insulation performance and the like, so the assembled structure is more and more favored by engineers at home and abroad. In the frame structure, beam column nodes are responsible for distributing internal force, ensure the integrity of the structure, and are easy to be weak parts under the action of earthquake and easy to damage. In view of the higher demand on the seismic capacity of the building at present, the fabricated node is a difficult problem to be solved urgently. At present, the assembled beam column joint is mainly connected by grouting cylinders, prestressed steel bars, profile steel and the like, and the construction process is complex and the cost is high. The connection form of the node is mostly rigid connection, the stress is complex, the deformability is small, and the node is easy to crack under the action of a strong earthquake. The hinge joint is a good choice since the ability of the frame to maintain integrity depends on the ability of the beam-column joint to deform after large deformations occur. The hinge joint does not transmit bending moment, is simple in stress, and the beam can freely rotate, so that the deformation capacity of the joint is improved. On the basis, the energy dissipation device is additionally arranged between the beam columns, so that the energy dissipation capacity of the hinged joint can be improved. The enhancement of the energy consumption capability of the node means the improvement of the earthquake resistance of the node, and means that the node can meet the earthquake resistance requirements of 'no damage due to small earthquake, repairable due to medium earthquake and no fall due to large earthquake'.

Disclosure of Invention

In order to solve the technical problem, the invention provides an energy dissipation and shock absorption node applied to an assembled concrete frame structure. The node is a hinged node, so that the deformation capacity of the node is greatly improved; in addition, two energy consumption devices are additionally arranged between the beam columns, the structure is simple, the energy consumption efficiency is high, the energy loss is small, and the safety and the durability of the structure can be effectively improved.

Two pre-buried connecting plate A in the post is provided with round pin shaft hole A on it, and two pre-buried connecting plate B of roof beam both ends respectively are provided with round pin shaft hole B on it, and it is articulated to pass round pin shaft hole A and round pin shaft hole B formation with the round pin axle after with connecting plate A and connecting plate B alignment during the assembly. For the position of fixed beam, post, guarantee that should hinge joint and not let both take place relative slip when rotating, the clearance between connecting plate A and the connecting plate B is filled with circular steel sheet and is made the backing plate. Energy dissipation damping device sets up in the top and the below of articulated round pin axle, the device is by last bush, lower bush, go up metal rubber, lower metal rubber, go up the stripper plate, lower stripper plate, go up backup pad and bottom suspension fagging constitution, wherein go up the bush and link to each other with the post through the built-in fitting with lower bush one end, other end opening forms hollow cuboid, be fixed with metal rubber and metal rubber down in this hollow cuboid respectively, it sets up in the beam-ends with lower stripper plate to go up the stripper plate, it has two backup pad supports to go up the stripper plate at the back, also have two bottom suspension fagging supports at the back of the lower stripper plate. And when in a static state, the upper extrusion plate and the lower extrusion plate are respectively contacted with the upper metal rubber and the lower metal rubber, but there is no fixed connection between the upper extrusion plate and the lower extrusion plate.

The column is a prefabricated column, one end of the column is provided with a dowel, the other end of the column is provided with a hole, the dowel of the upper column is inserted into the hole of the lower column, the hole is grouted to enable the dowel to be integrated with the lower column, and a space with the height of 200mm is reserved in the middle of the lower column. Compared with a cast-in-place column, the prefabricated column is prefabricated in a factory, can be directly installed on site, is convenient to construct, and can shorten the construction period. The reserved 200mm space is to facilitate the installation of subsequent components.

And after the connecting steel plate A is fixed in the reserved space with the height of 200mm, pouring the cast-in-place concrete.

The beam is a precast beam, and the connecting steel plates B are pre-embedded at two ends of the beam.

During assembly, the connecting steel plates A and the connecting steel plates B are aligned and are arranged in a staggered mode, and a gap is reserved between the two connecting steel plates. The thickness of the cushion plate enables the cushion plate to be filled in the gap between the adjacent connecting steel plates A or B, and polytetrafluoroethylene is arranged between the cushion plate and the connecting steel plates A and B. The backing plate plays the effect of keeping apart adjacent connection steel sheet, prevents to extrude friction each other between the connection steel sheet, leads to the turnability of node to descend, and polytetrafluoroethylene can reduce the friction between backing plate and the connection steel sheet, prevents that the node from taking place the friction and destroying at the rotation in-process.

The upper metal rubber and the lower metal rubber are materials formed by pressing metal wires and are respectively fixed in the upper bushing and the lower bushing through bolts, the upper bushing and the lower bushing are both in hollow cuboid shapes, and the upper metal rubber and the lower metal rubber are respectively filled in the corresponding hollow cuboids and respectively extend out of the upper bushing and the lower bushing by 2cm or more. The metal rubber has the inherent characteristics of metal, has the elasticity similar to that of rubber, has strong high temperature resistance and low temperature resistance, can resist corrosion by selecting different metals, has no possibility of ageing, and is an ideal substitute of the traditional rubber. When the metal rubber is excited by vibration or impacted, the metal wires in the metal rubber can elastically deform, and when the deformation reaches a critical value, the metal wires start to contact with each other, so that friction and extrusion are generated, and a large amount of energy is dissipated. When earthquake force comes to cause the node to rotate, the metal rubber can be extruded by the extrusion plate to generate compression deformation, partial energy generated by earthquake is converted into elastic potential energy of the rubber, the lining can prevent the metal rubber from expanding outwards, meanwhile, friction is generated between the metal rubber and the inner wall of the lining, partial energy generated by earthquake can be converted into heat energy generated by friction, and therefore the purposes of energy dissipation and shock absorption are achieved. The metal rubber is fixed in the bushing through a bolt and has the function of preventing the metal rubber from falling off from the bushing.

The upper extrusion plate and the lower extrusion plate are respectively contacted with the upper metal rubber and the lower metal rubber, but the contact surface is not provided with a connecting piece. The extrusion plate is used for extruding the metal rubber to deform the metal rubber, so that part of energy generated by an earthquake is converted into elastic potential energy generated by deformation and heat energy generated by friction, and energy dissipation and shock absorption are realized. Two supporting plates are arranged behind the extrusion plate and are used for preventing the extrusion plate from being broken under the action of external force.

The working process 1 of the energy dissipation and shock absorption node is as follows:

when the earthquake force makes the connecting steel plate B6 in the node rotate upwards by taking the pin shaft 5 as the center of a circle, the beam 2 also rotates upwards to drive the upper extrusion plate 14 to rotate leftwards to extrude the upper metal rubber 12, the deformation of the upper metal rubber 12 can consume part of energy generated by the earthquake, at the moment, the lower extrusion plate 15 is separated from the lower metal rubber 13, and the lower metal rubber 13 does not deform.

The working process 2 of the energy dissipation and shock absorption node is as follows:

when the earthquake force makes the connecting steel plate B6 in the node rotate downwards by taking the pin shaft 5 as a circle center, the beam 2 also rotates downwards to drive the lower extrusion plate 15 to move leftwards to extrude the lower metal rubber 13, the deformation of the lower metal rubber 13 can consume part of energy generated by the earthquake, at the moment, the upper extrusion plate 14 is separated from the upper metal rubber 12, and the upper metal rubber 12 does not deform.

The invention has the following advantages: (1) the node does not transfer bending moment and is simple in stress; (2) when earthquake force acts on the frame structure, the beam can freely rotate, and the deformation capacity of the node is improved; (3) the polytetrafluoroethylene is arranged between the steel plate and the base plate, so that the frictional resistance is reduced; (4) and a damping device is arranged between the beam columns, so that the energy consumption capability of the node is improved.

In addition, this node simple structure, each spare part and accessory all can be at the prefabricated processing of mill, and the change of being convenient for is economic reasonable. Adopt this kind of energy dissipation shock attenuation node can guarantee that absorbing protecting effect is better, and factor of safety is higher, and structural durability is high, can use for a long time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1: the overall structure schematic diagram of the energy dissipation and shock absorption node of the fabricated concrete frame structure is shown;

FIG. 2: a hinged node top view;

FIG. 3: the connecting schematic diagram of the bushing and the metal rubber;

FIG. 4: a backing plate schematic;

FIG. 5: the beam column and the connecting steel plate are connected schematically;

FIG. 6: the isometric views of the extrusion plate and the supporting plate are shown;

FIG. 7: working process 1 is a schematic diagram;

FIG. 8: working process 2 is a schematic diagram;

FIG. 9: and (4) plugging in the wall of the energy dissipation and shock absorption device.

In fig. 1 to 9, 1 is a column; 2 is a beam; 3 is a connecting steel plate A; 4 is a pin shaft hole A; 5 is a pin shaft; 6 is a connecting steel plate B; 7 is a pin shaft hole B; 8 is a backing plate; 9 is polytetrafluoroethylene; 10 is an upper bushing; 11 is a lower bushing; 12 is upper metal rubber; 13 is lower metal rubber; 14 is an upper extrusion plate; 15 is a lower extrusion plate; 16 is an upper supporting plate; 17 is a lower support plate and 18 is cast-in-place concrete.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Figure 1 is an overall schematic view of an energy dissipating and shock absorbing node applied to a fabricated concrete frame structure according to the present invention. As shown in fig. 1, the energy dissipation and shock absorption node mainly comprises a connecting steel plate A3, a connecting steel plate B6, a pin 5, an upper bushing 10, a lower bushing 11, an upper metal rubber 12, a lower metal rubber 13, an upper extrusion plate 14, a lower extrusion plate 15 and the like, wherein the connecting steel plate B6 can rotate along the pin 5, the deformation capacity of the node is increased, and the metal rubber can convert part of energy generated by an earthquake into heat energy generated by friction and elastic potential energy of rubber, so that the purposes of energy dissipation and shock absorption are achieved. The invention provides an energy dissipation and shock absorption node applied to an assembled concrete frame structure, which is characterized by comprising the following specific implementation steps:

(1) the column 1 is divided into two parts which are prefabricated in a factory, one part is inserted with a dowel, the other part is reserved with a hole, and meanwhile, the beam is prefabricated, and two pore channels are reserved;

(2) inserting the dowel bars into the holes, reserving cast concrete of 200mm between the two part columns, and simultaneously inserting two prefabricated connecting steel plates A3 into the cast-in-place concrete 18;

(3) inserting the prefabricated connecting steel plate B6 into two reserved pore channels on the beam, and pouring concrete for fixing;

(4) adhering polytetrafluoroethylene 9 to two sides of the backing plate 8;

(5) aligning holes in a connecting steel plate A3 and a connecting steel plate B6, placing a backing plate 8 between two adjacent steel plates, and fixing the connecting steel plate A3, the connecting steel plate B6 and the backing plate 8 by using a pin shaft 5;

(6) prefabricating an upper bushing 10 and a lower bushing 11 in a factory, fixing an upper metal rubber 12 and a lower metal rubber 13 inside the upper bushing 10 and the lower bushing 11 respectively by using bolts, and connecting the upper bushing 10 and the lower bushing 11 to a column through an embedded part;

(7) an upper squeeze plate 14 and a lower squeeze plate 15, which are prefabricated in a factory, are installed on the beam 2 through embedment members, and the upper squeeze plate 14 and the lower squeeze plate 15 are ensured to be in contact with the upper metal rubber 12 and the lower metal rubber 13, respectively.

(8) The upper supporting plate 16 and the lower supporting plate 17 are prefabricated in a factory, fixed on the beam 2 through embedded parts, and the upper supporting plate 16 is connected with the upper extrusion plate 14 and the lower supporting plate 17 is connected with the lower extrusion plate 15 in a welding mode.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an energy dissipation shock attenuation node for assembled concrete frame structure which characterized in that: two connecting steel plates A (3) are pre-buried in a column (1), a pin shaft hole A (4) is arranged on the connecting steel plates A, two connecting steel plates B (6) are pre-buried at two ends of a beam (2) respectively, a pin shaft hole B (7) is arranged on the connecting steel plates A (3), the connecting steel plates B (6) are aligned during assembly, a pin shaft (5) penetrates through the pin shaft hole A (4) and the pin shaft hole B (7) to form hinge joint, a round steel plate is filled in a gap between the connecting steel plates A (3) and the connecting steel plates B (6) to serve as a backing plate (8), an energy dissipation and shock absorption device is arranged above and below the pin shaft (5), and the device is composed of an upper lining (10), a lower lining (11), upper metal rubber (12), lower metal rubber (13), an upper extrusion plate (14), a lower extrusion plate (15), an upper support plate (16) and a lower support plate (17), wherein the upper lining (10) and one end of the lower, the other end opening forms hollow cuboid, go up bush (10) and lower bush (11) inside and be fixed with metal rubber (12) and metal rubber (13) down respectively, it sets up in roof beam (2) end to go up stripper plate (14) and stripper plate (15) down, it has two to go up backup pad (16) to support to go up stripper plate (14) back, stripper plate (15) have two backup pad (17) to support down back, and go up stripper plate (14) and stripper plate (15) down respectively in with last metal rubber (12) and metal rubber (13) contact down.

2. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 1, wherein: the column (1) is a prefabricated column, one end of the column is provided with a dowel, the other end of the column is provided with a hole, the dowel of the upper column is inserted into the hole of the lower column, the hole is grouted to enable the dowel to be integrated with the lower column, and a space with the height of 200mm is reserved in the middle of the lower column.

3. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 2, wherein: the connecting steel plate A (3) is fixed in the reserved space with the height of 200mm, and then cast-in-place concrete (18) is poured.

4. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 1, wherein: the beam (2) is a precast beam, and the connecting steel plates B (6) are pre-embedded at two ends of the beam.

5. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 1, wherein: the thickness of backing plate (8) makes it fill up in the space between adjacent connection steel sheet A (3) or connection steel sheet B (6), sets up polytetrafluoroethylene (9) between backing plate and connection steel sheet A (3) and connection steel sheet B (6).

6. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 1, wherein: the upper metal rubber (12) and the lower metal rubber (13) are materials formed by pressing metal wires and are respectively fixed in the upper bushing (10) and the lower bushing (11) through bolts, the upper bushing (10) and the lower bushing (11) are both in hollow cuboid shapes, the upper metal rubber (12) and the lower metal rubber (13) are respectively filled in the corresponding hollow cuboids and respectively extend out of the upper bushing (10) and the lower bushing (11) by 2cm or more.

7. An energy dissipating and shock absorbing node applied to an assembled concrete frame structure according to claim 1, wherein: the upper extrusion plate (14) and the lower extrusion plate (15) are respectively contacted with the upper metal rubber (12) and the lower metal rubber (13), but the contact surfaces are not provided with connecting pieces.