CN116240985A - A new self-resetting energy-dissipating box-type connecting column and its construction method - Google Patents

Abstract

The invention discloses a novel self-resetting energy-consumption box type connecting column and a construction method thereof, wherein the novel self-resetting energy-consumption box type connecting column comprises: the upper prefabricated column and the lower prefabricated column of the reinforced concrete structure, the prestressed high-strength bolt rod and the energy-consumption steel plate; a notch is formed at the lateral junction of the outer surface of each prefabricated column, and a steel box is fixed in the notch; the side surface and the end surface of each prefabricated column close to the connecting end area are provided with embedded steel plates in the concrete; the ends of the upper prefabricated column and the lower prefabricated column are attached and are connected through a prestress high-strength bolt rod fixed through a steel box; the outer surface corresponding to the embedded steel plate connecting area on the side surface of the column connecting part is provided with two hollow L-shaped energy consumption steel plates. The self-resetting function can be realized by using the elastic restoring force of the high-strength prestress bolt rod, and the layer-by-layer assembly is ensured; the L-shaped energy consumption steel plate has excellent shearing resistance and energy consumption performance; the invention can improve the bearing capacity of the node, improve the earthquake resistance, save the cost and facilitate the construction.

Description

A new self-resetting energy-dissipating box-type connecting column and its construction method

technical field

The invention belongs to the technical field of prefabricated concrete buildings, and in particular relates to a novel self-resetting energy-consuming box-type connecting column and a construction method thereof.

Background technique

In the prefabricated reinforced concrete frame structure, the connection technology of the prefabricated component nodes is the core technology of the prefabricated structure. The seismic performance of prefabricated buildings largely depends on the connection reliability of beam-column joints. Previous major earthquake surveys found that in buildings with prefabricated frame structures that collapsed, the prefabricated components were less damaged, and the main cause of the collapse was the failure of the connections between the prefabricated components. Therefore, how to ensure the effectiveness of the connection of prefabricated components and the rationality of node design is the key to ensure the safety performance and performance of the structure.

At present, the existing prefabricated concrete frame structure dry connection nodes still have to solve the following problems:

(1) The prefabricated beam-column connection node is called the node core area, which is the core part of the main body. In the structure, it is in the state of combined action of bending moment, shear force and axial force to assist beams, columns and other components to form an overall structure to jointly resist external loads. Therefore, it is necessary to weaken some components of the nodes to control the occurrence of plastic hinges at the beam ends during earthquakes, and dissipate the seismic force through plastic hinges to prevent components from being damaged before the nodes and affect the safety of the overall structure, satisfying the design concept of "strong nodes and weak components". To meet the seismic fortification requirements of "not damaged by small earthquakes, repairable by moderate earthquakes, and not collapsed by major earthquakes".

(2) Premature failure of the joint core area or the column end will affect the safety of the overall structure. During a large earthquake, although there is a good deformation capacity, the bearing capacity is insufficient, or there is sufficient bearing capacity but the energy dissipation capacity is insufficient. The existing beam-column dry connection joints are difficult to take into account both bearing capacity and deformation performance.

(3) At present, the self-resetting ability of joints is often realized by unbonded prestressed tendons. Although this can improve the self-resetting ability of the structure after an earthquake, its energy dissipation capacity is weak, and it will generate large stress at the beam end Concentration makes the concrete at the end of the beam prone to damage and weakens the flexural performance of the beam-column joints. Moreover, if only prestressed tendons are used to resist the bending moment and bear the shear force, a certain amount of stress loss will inevitably occur, resulting in post-earthquake The self-resetting ability deteriorates.

Therefore, research and develop a dry connection node with simple assembly, wide application, effective dissipation of seismic energy when an earthquake occurs, and a small deformation after the earthquake damage or recovery to the original state. development is important.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a novel self-resetting energy-dissipating box-type connecting column and its construction method. The technical problem to be solved in the present invention is realized through the following technical solutions:

In the first aspect, the embodiment of the present invention provides a new self-resetting energy-consuming box-type connecting column, including:

The upper prefabricated column and the lower prefabricated column of the reinforced concrete structure, as well as the prestressed high-strength bolt rod and energy-dissipating steel plate; wherein, a notch is opened at the side junction of the outer surface of each prefabricated column, and a steel box is fixed in the notch; each The side and end faces of the two prefabricated columns close to the connection end area are provided with embedded steel plates in the concrete; the ends of the upper prefabricated column and the lower prefabricated column are attached, and are fixed by prestressed high-strength bolt rods passing through the steel box The column connection is realized; and, on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection, two hollow L-shaped energy-dissipating steel plates are arranged.

In one embodiment of the present invention, the notch of the upper prefabricated column is located one third from the top of the upper prefabricated column; the notch of the lower prefabricated column is located one third from the bottom of the lower prefabricated column .

In one embodiment of the present invention, the steel box in each prefabricated column is anchored by the U-shaped stirrup pre-embedded in the prefabricated column and the concrete of the prefabricated column.

In one embodiment of the present invention, holes aligned up and down are reserved on the end face of each prefabricated column, the embedded steel plate on the end face, and the steel box; each prestressed high-strength bolt rod passes through the corresponding hole, and passes through the nut Fastened with steel box passing through.

In one embodiment of the present invention, among the energy-dissipating steel plates on each side, the hollow L-shape covers the joints of the columns.

In an embodiment of the present invention, the two Ls in the energy-dissipating steel plate have the same shape, and one L is obtained by rotating the other L plane by 180 degrees.

In one embodiment of the present invention, a group of energy-dissipating steel plates on the opposite side are of the same height, and are connected by tension bolts penetrating through the column; space avoidance.

In the second aspect, the embodiment of the present invention provides a construction method of a novel self-resetting energy-consuming box-type connecting column, the method comprising:

Making the upper prefabricated column and the lower prefabricated column; wherein, the outer surface of each prefabricated column is provided with a notch, and a steel box is fixed in the notch, and the side and end surface of each prefabricated column near the connection end area are provided with embedded steel plates;

Fix the lower prefabricated column, insert the prestressed high-strength bolt rod into the reserved channel of the lower prefabricated column, and extend the steel box for a certain distance and fix it with nuts;

Hoisting the upper prefabricated column, inserting the prestressed high-strength bolt rod into the reserved channel of the upper prefabricated column, extending the steel box for a certain distance and fixing it with nuts to form a structural body where the upper and lower columns are bonded;

Install energy-dissipating steel plates on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection; wherein, the energy-dissipating steel plates on each side include two hollow L-shaped.

In one embodiment of the present invention, the manufacturing process of each prefabricated column includes:

Carry out formwork for the prefabricated column, and reserve a notch at the side junction of the outer surface of the prefabricated column on the model;

Set up embedded steel plates on the side and end faces of the obtained model near the connection end area; wherein, the embedded steel plates on the end faces are reserved with holes;

Concrete is poured on the obtained model to obtain a reinforced concrete column structure; wherein, a channel is reserved on the end face of the reinforced concrete column structure, and is aligned with the reserved channel of the embedded steel plate on the end face;

A steel box is placed in the notch of the reinforced concrete column structure, and the steel box and concrete are anchored through the U-shaped stirrup embedded in the reinforced concrete column structure; wherein, the steel box is close to one of the connecting ends There is a channel reserved on the side, and the reserved channel is aligned with the end face of the reinforced concrete column structure and the channel reserved by the embedded steel plate of the end face, and the side of the steel box away from the connecting end is aligned with the prefabricated column Inner longitudinal reinforcement welded connection.

In one embodiment of the present invention, the process of installing the energy-dissipating steel plate on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection includes:

Setting the first group of energy-dissipating steel plates on the opposite side to have the same height, and connecting the first group of energy-dissipating steel plates through the tension bolts penetrating through the column;

Set the second group of energy-dissipating steel plates on the opposite side to be of the same height, but the height is staggered up and down with the height of the first group of energy-dissipating steel plates, and the second group of energy-dissipating steel plates is connected by the pull bolts penetrating through the column, In order to make the two sets of energy-dissipating steel plates use the opposite tension bolts to achieve space avoidance.

The new self-resetting energy-dissipating box-type connecting column provided by the embodiment of the present invention is a new dry-type connecting node of a prefabricated concrete frame structure, which is easy to assemble and has a wide range of applications, and can effectively dissipate seismic energy when an earthquake occurs. To ensure that the deformation after the earthquake damage is small or can be restored to the original state, compared with the existing technology, there are the following advantages:

(1) During the earthquake, the energy-dissipating steel plate absorbs the seismic energy through elastic-plastic deformation to achieve the purpose of energy dissipation. The L-shaped design of the energy-dissipating steel plate ensures the shear bearing capacity of the structure; It can realize self-resetting function, and can also ensure layer-by-layer assembly.

(2) The new self-resetting energy-dissipating box-type connecting column is an energy-dissipating connector, and the designed L-shaped energy-dissipating steel plate has excellent shear resistance and energy dissipation performance. Experimental studies have shown that the L-shaped design optimizes the shear performance of the steel plate. When an earthquake strikes, the energy-dissipating steel plate can also give full play to its ductility to dissipate energy under the premise of ensuring sufficient bearing capacity to ensure the safety of the main structure.

(3) The new self-resetting energy-dissipating box-type connecting column realizes the column-to-column connection through a new combination of pre-embedded embedded steel plates, energy-dissipating steel plates, and prestressed high-strength bolt rods, which can improve the bearing capacity of the nodes. When a large earthquake occurs, it can meet the design concept of "strong nodes, weak components", control the occurrence of plastic hinges at the node position, and achieve the effect of shock absorption through the energy dissipation yield of the nodes, thereby improving the seismic performance of the structure.

(4) The prefabricated column in the embodiment of the present invention is in the form of a tubular pile column, which has light weight and good cross-section expansion, which is convenient for transportation and hoisting at the construction site, and can effectively save production costs, transportation costs, and construction costs. In line with the design concept of green prefabricated buildings.

(5) The prefabricated columns of the embodiments of the present invention can all be prefabricated in factories, and can be directly assembled and poured on site, which can save most of the on-site pouring operations, save time and effort, and is highly efficient and environmentally friendly.

Description of drawings

Figure 1 is a schematic diagram of the overall installation arrangement of a new self-resetting energy-consuming box-type connecting column provided by an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of an embedded steel plate provided by an embodiment of the present invention;

Figure 3 is a partially enlarged view of the upper prefabricated column provided by the embodiment of the present invention;

Fig. 4 is the structural representation of the steel box that the upper prefabricated column of the embodiment of the present invention adopts;

Fig. 5 is the structural representation of the U-shaped stirrup provided by the embodiment of the present invention;

Fig. 6 is a schematic structural diagram of an energy-dissipating steel plate provided by an embodiment of the present invention;

Fig. 7 is a schematic flowchart of a construction method of a novel self-resetting energy-consuming box-type connecting column provided by an embodiment of the present invention;

Fig. 8 is a schematic structural view of the upper prefabricated column provided by the embodiment of the present invention;

Fig. 9 is a partially enlarged view provided by the embodiment of the present invention for understanding the space avoidance realized by the pulling bolts.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to achieve simple assembly, wide application, and effectively dissipate seismic energy when an earthquake occurs, to ensure that the deformation is small or the dry connection node can be restored to the original state after the earthquake, the embodiment of the present invention provides a new type of self-connecting joint. Resetting the energy-dissipating box-type connecting column and its construction method.

In the following, a novel self-resetting energy-dissipating box-type connecting column provided by the embodiment of the present invention will be firstly introduced.

As shown in Figure 1, a new self-resetting energy-consuming box-type connecting column provided by the embodiment of the present invention may include:

The upper and lower prefabricated columns of the reinforced concrete structure, as well as the prestressed high-strength bolt rods and energy-dissipating steel plates; wherein, a notch is opened at the side junction of the outer surface of each prefabricated column, and a steel box is fixed in the notch; each prefabricated The side and end faces of the columns near the connection end area are provided with embedded steel plates in the concrete; the ends of the upper prefabricated column and the lower prefabricated column are attached, and the column connection is realized by prestressed high-strength bolt rods fixed through the steel box; and, On the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection, two hollow L-shaped energy dissipation steel plates are arranged.

In each figure including Fig. 1 in the embodiment of the present invention, 1 indicates the longitudinal reinforcement of the upper column, that is, the longitudinal reinforcement of the upper prefabricated column; 2 indicates the upper prefabricated column; 3 indicates U-shaped stirrup; 4 indicates the prestressed high-strength bolt rod; 5 represents the steel box; 6 represents the embedded steel plate; 7 represents the energy-dissipating steel plate; 8 represents the lower prefabricated column; 9 represents the longitudinal reinforcement of the lower column, that is, the longitudinal reinforcement of the lower prefabricated column.

In order to make the layout clear and easy to understand the scheme, the following two parts describe the new self-resetting energy-dissipating box-type connecting column.

1) Prefabricated columns

In the embodiment of the present invention, the upper prefabricated column and the lower prefabricated column are prefabricated in the factory, and the preparation method and column structure are the same, only the direction is opposite. For the manufacturing process of each prefabricated column, please refer to the relevant description of the construction method of the new self-resetting energy-dissipating box-type connecting column later.

In the embodiment of the present invention, each prefabricated column is a reinforced concrete structure, and a plurality of longitudinal bars are arranged inside from top to bottom, and are bound and fixed by transverse stirrups. The outer surface of each prefabricated column is concrete, but an embedded steel plate is arranged in the concrete on the side and end near the connecting end area. The structure of the embedded steel plate is shown in Figure 2, where the circles represent the holes for bolts used to fix the embedded steel plate.

Specifically, the four sides and the bottom of the part of the area below the upper precast column are provided with embedded steel plates in the concrete, and the steel plates are welded and connected; the four sides and the top of the part of the area above the lower precast column are provided in the concrete. Embedded steel plates are welded and connected between each steel plate; among them, the size and height of the embedded steel plates on the four sides of each prefabricated column are the same, and together with the embedded steel plates at the end, the prefabricated column near the connection end area forms an enclosing structure. Confines concrete and increases the load-bearing capacity of precast columns.

The side junctions of the outer surface of each prefabricated column are provided with notches. It can be understood that since the prefabricated columns are usually in the shape of a cuboid, four notches can be provided in the corresponding directions of the four side junctions. Two pairs are symmetrical to each other, and each notch provides an inwardly recessed space for placing a steel box.

The role of the steel box in the embodiment of the present invention is to fix the prestressed high-strength bolt rod, so that the connection between the upper prefabricated column and the lower prefabricated column is realized by using the prestressed high-strength bolt rod. Therefore, considering the stability of the prestressed high-strength bolt rod, In an optional embodiment, the notch of the upper prefabricated column is located one third from the top of the upper prefabricated column; the notch of the lower prefabricated column is located one third from the bottom of the lower prefabricated column.

Among them, the side of the steel box in each prefabricated column near the connection end has a hole reserved to facilitate the insertion of the prestressed high-strength bolt rod, while the side of the steel box away from the connection end does not have a hole, which is pre-connected with the inside of the prefabricated column. The longitudinal reinforcement is welded so that the steel box can be fixed and supported through the longitudinal reinforcement.

The details can be understood by referring to Fig. 3 and Fig. 4. Fig. 3 is a partial enlarged view of the upper prefabricated column, and Fig. 4 is a structural schematic diagram of the steel box used in the upper prefabricated column. It can be seen from Figures 3 and 4 that the lower side of the steel box of the upper precast column is provided with a hole for inserting prestressed high-strength bolt rods, while the upper side is directly welded to the longitudinal reinforcement in the precast column. For the lower prefabricated column, the direction is opposite, that is, the upper side of the steel box is provided with a hole for inserting the prestressed high-strength bolt rod, while the lower side is directly welded to the longitudinal reinforcement in the prefabricated column, which can be understood in conjunction with Figure 1. The partial enlarged view and steel box structure diagram are not illustrated here for illustration.

Wherein, in an optional embodiment, in order to enhance the supporting force to the steel box, the diameter of the longitudinal reinforcement welded to the steel box may be larger than the diameter of the remaining longitudinal reinforcement in the prefabricated column and the prestressed high-strength bolt rod.

Moreover, the steel box in each prefabricated column is anchored by the U-shaped stirrup embedded in the prefabricated column and the concrete of the prefabricated column. For the structure of the U-shaped stirrup, please refer to Figure 5 for details.

And, in order to realize the insertion of prestressed high-strength bolt rods, holes aligned up and down are reserved on the end face of each prefabricated column, the embedded steel plate on the end face, and the steel box. Wherein, the end surface of the upper prefabricated column refers to its bottom surface, and the end surface of the lower prefabricated column refers to its top surface.

Therefore, in the production process of each prefabricated column, for each prestressed high-strength bolt rod, it is necessary to determine the diameter of each hole according to the diameter of the prestressed high-strength bolt rod, and leave an appropriate margin; The insertion position of the high-strength bolt rod is positioned corresponding to the end face of the prefabricated column, the embedded steel plate on the end face, and the holes above and below the steel box, so that the holes are aligned up and down, so that the prestressed high-strength bolt rod can be smoothly inserted into these holes in the future. .

2) Column connection

The upper prefabricated column and the lower prefabricated column are connected by prestressed high-strength bolt rods, wherein each prestressed high-strength bolt rod passes through the corresponding hole, and is fixed with the steel box passed through by nuts. Specifically, after the prestressed high-strength bolt rod passes through the steel box, make it protrude out of the steel box for a certain distance, and then tighten it with a nut to fix it, which can be understood by referring to Figure 1 and Figure 3 .

The embodiment of the present invention uses prestressed high-strength bolt rods to connect the upper prefabricated column and the lower precast column, and ensures layer-by-layer assembly while realizing self-resetting energy consumption of the connection structure. Compared with the traditional construction method of using prestressed steel strands from the top of the column to the bottom, the embodiment of the present invention is equivalent to dismantling the column layer by layer, and then assembling each prefabricated column as a layer unit through prestressed high-strength bolt rods , which is more conducive to assembly. At the same time, the self-resetting function can also be realized by using the elastic recovery force of the high-strength prestressed bolt rod.

The prestressed high-strength bolt rod connects the upper precast column and the lower precast column, so that the ends of the two are attached to form a structural anti-seismic main body. For the anti-seismic main body of the structure, an energy-dissipating steel plate is set on the outer surface corresponding to the connection area of the embedded steel plate on each side of the column connection. Each energy-dissipating steel plate has the same shape, including two hollow L-shaped. Please refer to Figure 6 for the structure of the energy-dissipating steel plate. In Figure 6, the area where the two Ls are located is hollow; the circle indicates the hole position of the tension bolt used to fix the energy-dissipating steel plate.

During an earthquake, the energy-dissipating steel plate of the embodiment of the present invention absorbs earthquake energy through elastic-plastic deformation to realize energy dissipation. Specifically, the energy-dissipating steel plate adopts an L-shaped design, because the design of the L-shaped energy-dissipating band can not only ensure that the energy-dissipating steel plate can effectively and permanently exert energy dissipation performance, but also avoid the out-of-plane instability that leads to early exit, so the structure can be guaranteed shear capacity and energy dissipation performance.

Among the energy-dissipating steel plates on each side, the hollow L-shape covers the joints of the columns. That is to say, the length direction of the L-shape is arranged longitudinally, passing through the connection position of the upper prefabricated column and the lower prefabricated column, so that the length of the L-shape covers each part of the upper prefabricated column and the lower prefabricated column. This design is confirmed by experimental research: The plastic deformation is mainly distributed in the vertical energy dissipation zone, and it is more serious in the area near the horizontal energy dissipation zone. Only the elements at the intersection of the vertical and horizontal energy dissipation bands have significant failures. In an optional embodiment, the horizontal central axis of the L-shape may be close to the connection surface of the upper prefabricated column and the lower prefabricated column.

In order to simplify the design, the two Ls in the energy-dissipating steel plate have the same shape, and one L is obtained by rotating the plane of the other L by 180 degrees.

In addition, a group of energy-dissipating steel plates on the opposite side have the same height, and are connected by tension bolts running through the column; and the tension bolts used to connect energy-dissipating steel plates on adjacent sides are staggered up and down to achieve space avoidance. For details, please refer to the two sides where the energy-dissipating steel plate is located in Figure 1. It can be understood that the energy-dissipating steel plate on the left side in Figure 1 is the same height as the energy-dissipating steel plate on the opposite side, and through the tension bolts that pass through the column, The connection to the opposite side is realized through the corresponding embedded steel plate, so the stay bolts are distributed laterally in the seismic main body of the structure.

Similarly, the energy-dissipating steel plate on the right side in Fig. 1 is the same height as the energy-dissipating steel plate on the opposite side, and the connection with the opposite side is realized through the corresponding embedded steel plate through the tension bolts penetrating through the column. Therefore, in order to prevent the two groups of laterally distributed tension bolts from intersecting in space, a negotiation is formed. It is necessary to reasonably determine the height difference of the energy-dissipating steel plates on adjacent sides according to the position of the tension bolt on the energy-dissipating steel plate and the diameter of the tension bolt.

The new self-resetting energy-dissipating box-type connecting column provided by the embodiment of the present invention is a new dry-type connecting node of a prefabricated concrete frame structure, which is easy to assemble and has a wide range of applications, and can effectively dissipate seismic energy when an earthquake occurs. To ensure that the deformation after the earthquake damage is small or can be restored to the original state, compared with the existing technology, there are the following advantages:

(1) During the earthquake, the energy-dissipating steel plate absorbs the seismic energy through elastic-plastic deformation to achieve the purpose of energy dissipation. The L-shaped design of the energy-dissipating steel plate ensures the shear bearing capacity of the structure; It can realize self-resetting function, and can also ensure layer-by-layer assembly.

(2) The new self-resetting energy-dissipating box-type connecting column is an energy-dissipating connector, and the designed L-shaped energy-dissipating steel plate has excellent shear resistance and energy dissipation performance. Experimental studies have shown that the L-shaped design optimizes the shear performance of the steel plate. When an earthquake strikes, the energy-dissipating steel plate can also give full play to its ductility to dissipate energy under the premise of ensuring sufficient bearing capacity to ensure the safety of the main structure.

(3) The new self-resetting energy-dissipating box-type connecting column realizes the column-to-column connection through a new combination of pre-embedded embedded steel plates, energy-dissipating steel plates, and prestressed high-strength bolt rods, which can improve the bearing capacity of the nodes. When a large earthquake occurs, it can meet the design concept of "strong nodes, weak components", control the occurrence of plastic hinges at the node position, and achieve the effect of shock absorption through the energy dissipation yield of the nodes, thereby improving the seismic performance of the structure.

(4) The prefabricated column in the embodiment of the present invention is in the form of a tubular pile column, which has light weight and good cross-section expansion, which is convenient for transportation and hoisting at the construction site, and can effectively save production costs, transportation costs, and construction costs. In line with the design concept of green prefabricated buildings.

(5) The prefabricated columns of the embodiments of the present invention can all be prefabricated in factories, and can be directly assembled and poured on site, which can save most of the on-site pouring operations, save time and effort, and is highly efficient and environmentally friendly.

Hereinafter, the construction method of the novel self-resetting energy-dissipating box-type connecting column of the embodiment of the present invention will be described in detail. As shown in Figure 7, the construction method of the novel self-resetting energy-dissipating box-type connecting column may include the following steps:

S1, making the upper prefabricated column and the lower prefabricated column;

Wherein, the outer surface of each prefabricated column is provided with a notch, and a steel box is fixed in the notch, and the side and end surface of each prefabricated column near the connection end area are provided with embedded steel plates.

In the embodiment of the present invention, the structure and preparation method of the upper prefabricated column and the lower prefabricated column are completely consistent.

Among them, the production process of each prefabricated column includes:

S11, supporting the formwork for the prefabricated column, and reserving a notch at the side junction of the outer surface of the prefabricated column on the model;

Among them, during the process of setting up the formwork to tie the steel bars, longitudinal bars for support are reserved for the steel box.

S12, setting an embedded steel plate on the side and end surface of the obtained model close to the connection end area;

Wherein, the embedded steel plate on the end face is reserved with holes.

S13, pouring concrete on the obtained model to obtain a reinforced concrete column structure;

Wherein, a channel is reserved on the end face of the reinforced concrete column structure, and is aligned with the channel reserved by the embedded steel plate on the end face.

S14, place a steel box in the notch of the reinforced concrete column structure, and anchor the steel box and concrete through the U-shaped stirrup embedded in the reinforced concrete column structure;

Among them, a hole is reserved on the side of the steel box close to the connection end, and the reserved hole is aligned with the end face of the reinforced concrete column structure and the hole reserved by the embedded steel plate on the end face, and the side of the steel box away from the connection end is aligned with the prefabricated column. Inner longitudinal reinforcement welded connection.

Please refer to Figure 8 for the completed prefabricated column. Figure 8 is a schematic diagram of the structure of the upper prefabricated column. As for the lower prefabricated column, its structure is the same as that of the upper prefabricated column, but its direction is opposite, so it will not be illustrated here.

S2, fix the lower prefabricated column, insert the prestressed high-strength bolt rod into the reserved channel of the lower prefabricated column, and extend out of the steel box for a certain distance and fix it with nuts;

S3, hoist the upper prefabricated column, insert the prestressed high-strength bolt rod into the reserved channel of the upper precast column, and extend the steel box for a certain distance and fix it with nuts to form the structural main body of the upper and lower columns;

S4, installing energy-dissipating steel plates on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection;

Specifically, S4 includes the following steps:

S41, setting the first group of energy-dissipating steel plates on the opposite side to have the same height, and connecting the first group of energy-dissipating steel plates through the tension bolts penetrating through the column;

S42, set the height of the second group of energy-dissipating steel plates on the opposite side to be the same, but the height is staggered up and down with the height of the first group of energy-dissipating steel plates, and connect the second group of energy-dissipating steel plates through the pull bolts that pass through the column, so that The two sets of energy-dissipating steel plates use the opposite tension bolts to realize space avoidance.

Please refer to Figure 9 to understand the space avoidance of the pull bolts. Figure 9 is a partial enlarged view in Figure 1. From the part circled by the larger circle, it can be seen that there is a height difference between the upper sides of the energy-dissipating steel plates on the two adjacent sides. Therefore, the tension bolts corresponding to the two energy-dissipating steel plates are also on different planes, which can realize space avoidance.

Among them, the energy-dissipating steel plate on each side contains two hollow L-shaped. Please refer to Figure 6 above for the structure of the energy-dissipating steel plate, which will not be repeated here.

In the solution provided by the embodiment of the present invention, by prefabricating the upper column and the lower column, and realizing the column connection at the construction site, a new self-resetting energy-dissipating box-type connecting column is provided as a new dry connection of the prefabricated concrete frame structure node. The scheme is simple to assemble and has a wide range of applications. It can effectively dissipate seismic energy when an earthquake occurs, and ensure that the deformation is small or can be restored to the original state after the earthquake damage occurs. For the specific effect of the new self-resetting energy-dissipating box-type connecting column, please refer to the relevant description above, and will not be repeated here.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A new self-resetting energy-consuming box-type connecting column, characterized in that it includes: The upper prefabricated column and the lower prefabricated column of the reinforced concrete structure, as well as the prestressed high-strength bolt rod and energy-dissipating steel plate; wherein, a notch is opened at the side junction of the outer surface of each prefabricated column, and a steel box is fixed in the notch; each The side and end faces of the two prefabricated columns close to the connection end area are provided with embedded steel plates in the concrete; the ends of the upper prefabricated column and the lower prefabricated column are attached, and are fixed by prestressed high-strength bolt rods passing through the steel box The column connection is realized; and, on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection, two hollow L-shaped energy-dissipating steel plates are arranged. 2. The new self-resetting energy-dissipating box-type connection column according to claim 1, wherein the notch of the upper prefabricated column is located at a position one-third from the top of the upper prefabricated column; the notch of the lower prefabricated column The notch is located one-third from the bottom of the lower prefabricated column. 3. The new self-resetting energy-dissipating box-type connecting column according to claim 1, wherein the steel box in each prefabricated column is anchored by the U-shaped stirrup embedded in the prefabricated column and the concrete of the prefabricated column . 4. The novel self-resetting energy-dissipating box-type connecting column according to claim 1, characterized in that, the end face of each prefabricated column, the embedded steel plate on the end face, and the steel box are reserved with vertically aligned channels; each The prestressed high-strength bolt rod passes through the corresponding hole, and is fixed with the steel box passing through the nut. 5. The new self-resetting energy-dissipating box-type connection column according to claim 1, characterized in that, among the energy-dissipating steel plates on each side, the hollow L-shape covers the connection of the column. 6. The new self-resetting energy-dissipating box-type connecting column according to claim 5, characterized in that, the two Ls in the energy-dissipating steel plates have the same shape, and one L is obtained by rotating the other L plane by 180 degrees . 7. The new self-resetting energy-dissipating box-type connecting column according to any one of claims 1, 5, and 6, characterized in that a group of energy-dissipating steel plates on the opposite side have the same height, and are pulled through the column body The bolts are connected; and the pull bolts used to connect the adjacent side energy-dissipating steel plates are staggered up and down to achieve space avoidance. 8. A construction method for a new self-resetting energy-dissipating box-type connecting column, characterized in that it includes: Making the upper prefabricated column and the lower prefabricated column; wherein, the outer surface of each prefabricated column is provided with a notch, and a steel box is fixed in the notch, and each prefabricated column is provided with an embedded steel plate on the side and end surface near the connection end area; Fix the lower prefabricated column, insert the prestressed high-strength bolt rod into the reserved channel of the lower prefabricated column, and extend the steel box for a certain distance and fix it with nuts; Hoisting the upper prefabricated column, inserting the prestressed high-strength bolt rod into the reserved channel of the upper prefabricated column, extending the steel box for a certain distance and fixing it with nuts to form a structural body where the upper and lower columns are bonded; Install energy-dissipating steel plates on the outer surface corresponding to the connection area of the embedded steel plate on the side of the column connection; wherein, the energy-dissipating steel plates on each side include two hollow L-shaped. 9. The construction method of the novel self-resetting energy-dissipating box-type connecting column according to claim 8, characterized in that the manufacturing process of each prefabricated column includes: Carry out formwork for the prefabricated column, and reserve a notch at the side junction of the outer surface of the prefabricated column on the model; Set up embedded steel plates on the side and end faces of the obtained model near the connection end area; wherein, the embedded steel plates on the end faces are reserved with holes; Concrete is poured on the obtained model to obtain a reinforced concrete column structure; wherein, a channel is reserved on the end face of the reinforced concrete column structure, and is aligned with the reserved channel of the embedded steel plate on the end face; A steel box is placed in the notch of the reinforced concrete column structure, and the steel box and concrete are anchored through the U-shaped stirrup embedded in the reinforced concrete column structure; wherein, the steel box is close to one of the connecting ends There is a channel reserved on the side, and the reserved channel is aligned with the end face of the reinforced concrete column structure and the channel reserved by the embedded steel plate of the end face, and the side of the steel box away from the connecting end is aligned with the prefabricated column Inner longitudinal reinforcement welded connection. 10. The construction method of the new self-resetting energy-dissipating box-type connecting column according to claim 9, characterized in that the process of installing energy-dissipating steel plates on the outer surface corresponding to the embedded steel plate connection area on the side of the column connection, include: Setting the first group of energy-dissipating steel plates on the opposite side to have the same height, and connecting the first group of energy-dissipating steel plates through the tension bolts penetrating the column; Set the second group of energy-dissipating steel plates on the opposite side to have the same height, but the height is staggered up and down with the height of the first group of energy-dissipating steel plates, and connect the second group of energy-dissipating steel plates through the pull bolts penetrating through the column, In order to make the two sets of energy-dissipating steel plates use the opposite tension bolts to achieve space avoidance.

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