CN203096950U - Automatic reset frame beam column node - Google Patents

Abstract

The utility model belongs to the field of construction, and relates to a self-resetting frame beam-column joint, which comprises a concrete beam (1) and a concrete column (2), and the concrete beam (1) and the concrete column (2) are bonded and low-slack The prestressed steel strand (3) is connected to the angle steel (9), the end of the concrete beam (1) is provided with a third steel plate (8), and the concrete column (2) is provided with a first steel plate near the beam side (5), the second steel plate (7) is provided on the side facing away from the beam, and the unbonded low-relaxation prestressed steel strand (3) passes through the third steel plate (8) at the beam end and the first steel plate at the column side (5), use the anchor (10) to anchor on the outside of the second steel plate (7) on the side of the column. The angle steel (9) is respectively connected with the concrete beam (1) and the concrete column (2) through the screw rod (4) and the nut (6). The first steel plate (5) is in contact with the third steel plate (8). The utility model can realize the effects of stable structure under small earthquake, large deformation but no damage of structure under large earthquake, and self-resetting of structure after earthquake.

Description

A self-resetting frame beam-column joint

technical field

The utility model belongs to the field of construction engineering, and relates to the technology of energy dissipation and shock absorption of building structures, in particular to a self-resetting structure.

technical background

Recoverable functional structure is a new type of shock-absorbing control structure. It can not only protect people's lives and property during earthquakes, but also help people return to normal life as soon as possible after a major earthquake. It is an ideal new structure for seismic design. direction. Restorable structural systems mainly include replaceable structural components, rocking structures, and self-resetting structures. In recent years, studies have shown that the sway of the structure can reduce the seismic action and the ductility design requirements of the structure itself, reduce the earthquake damage, and save the structural cost. Relax the constraints between the structure and the foundation or between the components, so that the contact surface between the structure and the foundation or components has only compressive capacity but no tensile capacity, then the structure will sway under the action of the earthquake, and the structure will be reset by prestressing to form a self-resetting structure. This new structural system can not only effectively control the "maximum deformation" of the structure, but also reduce the "residual deformation" of the structure.

At present, the self-resetting structure belongs to an innovative research field in the aspect of structural earthquake resistance, and the frame beam-column joints with self-resetting ability need to be researched and developed.

Utility model content

The purpose of this utility model is to provide a frame beam-column joint with self-resetting ability in order to overcome the defects of the prior art. The ideal effect of self-resetting of the rear structure.

In order to achieve the above object, the technical solution adopted by the utility model is:

A self-resetting frame beam-column joint, comprising a concrete beam and a concrete column, the concrete beam and the concrete column are connected through an unbonded low-relaxation prestressed steel strand and an angle steel, and the end of the concrete beam is provided with a third Steel plates, the first steel plate is provided on the side of the concrete column near the beam, the second steel plate is provided on the side facing away from the beam, and the unbonded low-relaxation prestressed steel strand passes through the third steel plate at the beam end and the third steel plate at the column side The first steel plate is anchored on the outside of the second steel plate on the side of the column with anchors; the angle steel is connected to the concrete beam and the concrete column respectively through screws and nuts; the first steel plate and the third steel plate are only in contact without adhesion.

A steel strand hole is provided on the third steel plate at the beam end to guide the steel strand to pass through.

The first steel plate and the second steel plate on the side of the column are provided with steel strand holes and screw holes for respectively guiding the steel strand and the screw to pass through.

The third steel plate at the beam end should be fixedly connected with the longitudinal reinforcement of the column reinforcement cage, such as welding.

If the concrete beams and concrete columns are prefabricated, holes should be reserved to guide the steel strands to pass through.

If the concrete beams and concrete columns are cast-in-situ, the steel strands should be bound together with the beam-column reinforcement cage.

The steel strands should be located on the upper and lower sides of the concrete beam, and the amount and prestress should be uniformly arranged. Mesh bars or spiral hoops should be set around the steel strands mentioned at the beam ends.

Holes should be set on the angle steel for the screw to pass through.

For concrete beams, the screw rod is fixed on the outside of the angle steel through nuts. For the concrete column, the screw rod is fixed on the outside of the angle steel and the outside of the steel plate on the side of the column through nuts.

The anchors are clip-type anchors, support anchors or cone-plug anchors.

Owing to having adopted above-mentioned scheme, the beneficial effect of the utility model is:

With the new self-resetting frame beam-column joint provided by the utility model, under a small earthquake, the beam-column joint is the same as the fixed joint, under a moderate or large earthquake, the compressive stress on one side of the beam end disappears, the beam end opens, and the angle steel transfers The shear force provides rotational stiffness, the structure undergoes large deformation but does not fail, and the prestressed tendon is always in an elastic state. After the earthquake, the concrete beam and concrete column have no damage and residual deformation. Under the action of the prestressed tendon, the beam end returns to the In the initial state, the structure is stable under small earthquakes, the structure is deformed but not damaged under large earthquakes, and the structure is self-resetting after the earthquake.

The utility model has simple scheme and convenient construction, can realize self-resetting shock absorption control effect well, ensures the safety of the structure under earthquake action, and can be widely used in the technical field of energy dissipation and shock absorption of building structures.

Description of drawings

Fig. 1 is a schematic front view of a beam-column joint of a self-resetting frame according to an embodiment of the present invention.

Fig. 2 is a schematic left view of the self-resetting frame beam-column joint of the embodiment of the utility model.

Fig. 3 is a schematic top view of the self-resetting frame beam-column joint of the embodiment of the present invention.

Fig. 4 is a partial sectional view of 1-1 in the embodiment shown in Fig. 2 .

FIG. 5 is a schematic front view of the steel plate 5 and the steel plate 7 in the embodiment shown in FIG. 1 .

FIG. 6 is a schematic front view of the steel plate 8 in the embodiment shown in FIG. 1 .

Fig. 7 is a schematic front view of the angle steel 9 in the embodiment shown in Fig. 1 .

Fig. 8 is a schematic left view of the angle steel 9 in the embodiment shown in Fig. 1 .

FIG. 9 is a schematic top view of the angle steel 9 in the embodiment shown in FIG. 1 .

Fig. 10a is a schematic diagram of the original state working principle of the self-resetting frame beam-column joint.

Fig. 10b is a schematic diagram of the working principle of opening one side of the beam end of the self-resetting frame beam-column joint.

Fig. 10c is a schematic diagram of the working principle of restoring the original state of the beam-column joint of the self-resetting frame.

Fig. 10d is a schematic diagram of the working principle of opening the other side of the beam end of the self-resetting frame beam-column joint.

Notes on drawings:

1 concrete beam, 2 concrete column,

3 unbonded low-relaxation prestressed steel strands, 4 screw rods,

5 The first steel plate on the side of the concrete column close to the beam end, 51 Steel strand holes on the steel plates on both sides of the concrete column,

52 screw holes on the steel plates on both sides of the concrete column, 6 nuts,

7 The second steel plate on the side of the concrete column facing away from the beam end, 8 The third steel plate at the concrete beam end,

81 steel strand hole on the steel plate at the end of the concrete beam, 9 angle steel,

Screw holes on 91 angle steel, 10 anchors,

11 beam reinforcement cage longitudinal reinforcement, 12 spiral hoops.

Detailed ways

The utility model will be further described below in conjunction with the embodiment shown in the accompanying drawings.

The beam-column joint of the self-resetting frame adopts a cast-in-place construction method. A self-resetting frame beam-column joint, including a concrete beam 1 and a concrete column 2, the concrete beam 1 and the concrete column 2 are connected by an unbonded low-relaxation prestressed steel strand 3 and an angle steel 9, and the end of the concrete beam 1 is provided with a Three steel plates 8, the first steel plate 5 and the second steel plate 7 are provided near the beam side and the back side of the concrete column, and the unbonded low-relaxation prestressed steel strand 3 passes through the third steel plate 8 at the beam end and the first steel plate at the column side 5. Use the anchor 10 to anchor on the outside of the second steel plate 7 on the side of the column. The angle steel 9 is connected with the concrete beam 1 and the concrete column 2 through the screw rod 4 and the nut 6 respectively. There is only contact between the third steel plate 8 and the first steel plate 5 without adhesion.

The third steel plate 8 at the beam end is provided with a steel strand hole 81 for guiding the steel strand 3 to pass through.

Steel strand holes 51 and screw holes 52 are provided on the first steel plate 5 and the second steel plate 7 on the side of the column, respectively guiding the steel strand 3 and the screw 4 to pass through.

The third steel plate 8 at the beam end should be welded with the longitudinal reinforcement 11 of the column reinforcement cage.

The concrete beam 1 and the concrete column 2 are cast-in-situ, and the steel strand 3 is bound together with the beam-column reinforcement cage.

The steel strand 3 should be located on the upper and lower sides of the concrete beam 1, and the amount and prestress should be uniformly arranged. Reticulated steel bars or spiral hoops 12 should be arranged around the steel strands at the beam ends.

A hole 91 is set on the angle steel 9 for the screw rod 4 to pass through.

For the concrete beam 1, the screw rod 4 is fixed on the outside of the angle steel 9 through the nut 6. For the concrete column 2, the screw rod 4 is fixed on the outside of the angle steel 8 and the outside of the second steel plate 7 on the side of the column through the nut 6.

The steel strand 3 is a flexible rod, passing through the concrete beam 1, the third steel plate 8, the first steel plate 5, the concrete column 2, and the second steel plate 7, and finally clamped and fixed by the anchor 10.

The anchor 10 can be a clip-type anchor, a support anchor or a taper-plug anchor.

During specific construction, the steel strand 3, the screw rod 4, the first steel plate 5, the nut 6, the second steel plate 7, the third steel plate 8, the angle steel 9, and the anchor 10 can all be prefabricated in the factory, and the installation and combination are based on the above-mentioned implementation method utility model. When in use, a self-resetting frame beam-column joint of the utility model is used between the beam-columns to complete the construction.

Vibrating table tests have proved that the utility model can meet the requirements of small earthquakes, the beam-column joints are the same as the fixed joints, under moderate earthquakes or large earthquakes, the compressive stress on one side of the beam end disappears, the beam end opens, and the angle steel transmits shear force and To provide rotational stiffness, the structure undergoes large deformation but does not break, and the prestressed tendons are always in an elastic state. After the earthquake, the concrete beam and concrete column have no damage and residual deformation. Under the action of the prestressed tendons, the beam end returns to the initial state. To achieve the ideal effect of structural stability under small earthquakes, large deformation but no damage under major earthquakes, and self-resetting of structures after earthquakes.

The utility model can be widely used in energy-dissipating and shock-absorbing structural systems, and can not only ensure good energy-dissipating and shock-absorbing effects under earthquake action, but also achieve the purpose of reducing structural earthquake damage, and can make the The structure is deformed but not damaged, and there is no damage and residual deformation after the earthquake, realizing the effect of structural self-resetting.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and apply the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the utility model is not limited to the embodiments here, and improvements and modifications made by those skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims (10)

1. A self-resetting frame beam-column joint, characterized in that it includes a concrete beam (1) and a concrete column (2), and the concrete beam (1) and concrete column (2) are prestressed through unbonded low relaxation The steel strand (3) is connected to the angle steel (9), the end of the concrete beam (1) is provided with a third steel plate (8), and the concrete column (2) is provided with a first steel plate (5) near the beam side ), the second steel plate (7) is provided on the side facing away from the beam, and the unbonded low-relaxation prestressed steel strand (3) passes through the third steel plate (8) at the beam end and the first steel plate (5) at the column side ), anchored on the outside of the second steel plate (7) on the side of the column with an anchor (10); the angle steel (9) is connected to the concrete beam (1) and the concrete column (2) through the screw (4) and the nut (6) respectively ) connection; the first steel plate (5) is in contact with the third steel plate (8). 2. The self-resetting frame beam-column joint according to claim 1, characterized in that: the third steel plate (8) at the beam end is provided with a steel strand hole (81) to guide the steel strand (3) through Pass. 3. The self-resetting frame beam-column joint according to claim 1, characterized in that: the first steel plate (5) and the second steel plate (7) on the side of the column are provided with steel strand holes (51) and The screw hole (52) guides the steel strand (3) and the screw (4) to pass through respectively. 4. The self-resetting frame beam-column joint according to claim 1, characterized in that: the third steel plate (8) at the beam end is fixedly connected to the longitudinal reinforcement (11) of the column reinforcement cage. 5. The self-resetting frame beam-column joint according to claim 1, characterized in that: the concrete beams (1) and concrete columns (2) are prefabricated, and holes are reserved to guide the steel strands (3) to pass through. 6. The self-resetting frame beam-column joint according to claim 1, characterized in that: the concrete beam (1) and concrete column (2) are cast-in-place, and the steel strand (3) is tied to the beam-column reinforcement cage together. 7. The self-resetting frame beam-column joint according to claim 1, characterized in that: the steel strands (3) are located on the upper and lower sides of the concrete beam (1), and the amount and prestress are uniformly arranged; Reticulated steel bars or spiral hoops (12) are arranged around the steel strand (3). 8. The self-resetting frame beam-column joint according to claim 1, characterized in that: the angle steel (9) is provided with a hole (91) for the screw rod (4) to pass through. 9. The self-resetting frame beam-column joint according to claim 1, characterized in that: for concrete beams (1), the screw (4) is fixed on the outside of the angle steel (9) through nuts (6); for concrete columns (2), the screw rod (4) is fixed on the outer side of the angle steel (9) and the second steel plate (7) on the side of the column through the nut (6). 10. The self-resetting frame beam-column joint according to claim 1, characterized in that the anchor (10) is a clip-type anchor, a support anchor or a taper-plug anchor.

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