CN218911745U - Self-resetting joints and self-resetting column foot structures that can be prefabricated - Google Patents

Abstract

The utility model discloses a prefabricated self-resetting node and a self-resetting column foot structure, which comprise a column mechanism and a concrete beam, wherein a plurality of box block assemblies are fixedly connected to the side surfaces of the column mechanism respectively; the bottom end of the upright post mechanism is fixedly connected with a supporting component. The utility model realizes that the device can be self-reset when the device is greatly deformed, and each part is prefabricated in a split mode, so that the on-site combined assembly can be realized, and the construction efficiency is improved.

Description

Self-resetting joints and self-resetting column foot structures that can be prefabricated

technical field

The utility model relates to the technical field of civil engineering, in particular to a prefabricated and assembled self-resetting node and self-resetting column base structure.

Background technique

Although the current prefabricated nodes have achieved relatively convenient construction, they cannot yet achieve self-resetting, and there is still room for further improvement in function. The Chinese patent discloses a prefabricated frame beam-column assembly type node connection device (notification number: CN214833401U), which can solve the collision problem of prefabricated beam longitudinal reinforcement and prefabricated column longitudinal reinforcement in the process of on-site hoisting. When deformed, the self-resetting function cannot be realized. At the same time, the Chinese patent discloses a self-resetting square concrete-filled steel tube column foot node with a frictional anchoring device (the announcement number is: CN112081305A). The anchoring device can realize frictional anchoring. The effect of the fixed anchoring method is the same; when the lateral displacement of the structure exceeds the design value, the anchoring device slides, and the internal force of the prestressed tendon remains at a constant value, avoiding the problem of sudden fracture of the prestressed tendon or a sudden drop in the bearing capacity after yielding, and the ductility of the joint Significantly increased. However, when the prestressed tendons are exposed outside, under the action of high-intensity earthquakes, the prestresses are easy to break, causing personal injury. At the same time, the foundation part of the device needs to be poured together with the square steel pipe column, which is not easy to transport and does not meet the current assembly style. development requirements.

Utility model content

The purpose of the utility model is to provide a self-resetting node and self-resetting column base structure that can be prefabricated and assembled, so as to solve the above-mentioned problems in the prior art.

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

A self-resetting node and self-resetting column base structure that can be prefabricated and assembled, including a column mechanism and a concrete beam. Several box assemblies are fixedly connected to the sides of the column mechanism, and one end of the box assembly is screwed with a beam steel end. , the end of the beam steel is fixedly connected to one end of the concrete beam, the other end of the concrete beam is fixedly connected to the tail end of the beam steel, the tail end of the beam steel runs through prestressed tendons with or without bonding, and the prestressed tendons without bonding One end of the beam is anchored to the tail end of the beam steel through an anchor, and the other end of the unbonded prestressed tendon runs through the concrete beam respectively, and the end of the beam steel is detachably connected with the box assembly; The bottom end of the column mechanism is fixedly connected with a supporting component.

Preferably, the column mechanism includes an outer steel pipe and an inner steel pipe, the inner wall of the outer steel pipe is fixedly connected to the outer surface of the inner steel pipe through a number of internal reinforcement ribs, and the outer surface of the outer steel pipe is fixed with a number of external reinforcements. Ribs, the outer reinforcing ribs are fixedly connected to the box block assembly; the top and bottom surfaces of the outer steel pipe are respectively fixedly connected with a column top sealing plate and a column bottom sealing plate. The bottom surface of the column bottom sealing plate is fixedly connected with the support assembly.

Preferably, the box block assembly includes a box-shaped connecting block and several vertical connecting plates, one end of several vertical connecting plates is fixedly connected with an end surface of the box-shaped connecting block, and several vertical connecting plates The gaps are arranged at equal intervals; NAO friction plates are fixedly connected between the adjacent vertical connecting plates; the other end of the vertical connecting plates is fixedly connected to the end of the beam steel.

Preferably, the support assembly includes a steel box concrete and a base, the bottom surface of the steel box concrete is fixedly connected to the top surface of the base, and the two ends of the steel box concrete top surface are respectively fixed with anti-skid pads, and the two The side of the anti-slip pad and the top surface of the steel box concrete are respectively fixedly connected with the column bottom sealing plate.

Preferably, the column top sealing plate is also detachably connected to the steel box concrete through the anchor and the unbonded prestressed tendon.

Preferably, both the inner cavity of the inner steel pipe and the inner cavity of the outer steel pipe are filled with concrete.

Preferably, the base is a steel box structure.

The utility model has the following technical effects:

The utility model provides the self-resetting ability of the beam by setting the unbonded prestressed tendons on the self-resetting node of the frictional energy-dissipating concrete-filled steel pipe column-concrete beam that can be prefabricated and assembled, and can bear part of the bending moment under the action of an earthquake to realize small earthquakes The non-destructive recovery of the beam-column joint can be realized under the action of a large earthquake. The beam-column joint has no damage or slight damage under the action of a large earthquake. The end of the beam steel will produce a corner, and the contact surface will partly break away from the box-shaped connection block. The beam end and the NAO friction plate will have a relative displacement. The contact surface friction between the NAO friction plate and the beam steel end will be used to realize the energy dissipation capacity of the node. By setting the external reinforced ribs on the outer steel pipe of the CFST column and the box-shaped connection block, the initial stiffness and strength of the beam column are increased, and a certain energy dissipation capacity is provided; the inner steel pipe is set between the outer steel pipe and the inner steel pipe of the CFST The reinforced ribs can better transmit the force of the outer reinforced ribs to the steel tube concrete column, and avoid the phenomenon of tearing of the outer steel tube at the outer reinforced ribs due to excessive force. In addition, the CFST column is closely aligned with the top surface of the support component, and the column top sealing plate on the bottom surface of the CFST column and the top surface of the support component are aligned with each other to stretch the unbonded prestressed tendons, which ensures that the column foot of the CFST column will not be affected by the earthquake. Under the action, it can rotate and dissipate the seismic energy, so that the steel tube concrete column is in an elastic state during the rotation of the column foot, and the plastic deformation and damage in the post-earthquake structure are avoided to the greatest extent. All components can be manufactured in the factory, and assembled in order after being transported to the site. The installation steps are simple and clear, and the requirements for construction personnel are not high. All structural components can be quickly disassembled and reinstalled after damage. The development concept of reset structure repairable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the utility model side view structural representation;

Fig. 2 is the schematic diagram before assembly of the concrete beam and the box-type connecting block;

Fig. 3 is the schematic diagram after the assembly of concrete beam and box-type connection block;

Figure 4 is a schematic diagram of the installation of the outer steel pipe and the inner and outer reinforcement ribs;

Figure 5 is a schematic diagram of the installation of the inner steel pipe;

Figure 6 is a schematic diagram of a steel pipe concrete column;

Fig. 7 is a schematic diagram of a side view structure of a support assembly;

Among them, 1. Box connection block; 2. Vertical connection plate; 3. Beam steel end; 4. Concrete beam; 5. Beam steel end; 6. High-strength bolt; 7. Unbonded prestressed tendon; ; 9. Outer steel pipe; 10. Outer reinforced rib; 11. Inner reinforced rib; 12. Inner steel pipe; 13. Column bottom sealing plate; 14. Column top sealing plate; 15. Anti-skid pad; 16. Steel box concrete ; 17, base.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

A self-resetting node and self-resetting column base structure that can be prefabricated and assembled as shown in Figure 1-7 includes a column mechanism and a concrete beam 4. Several box assemblies are respectively fixed on the sides of the column mechanism, and one end of the box assembly The beam steel end 3 is screwed, the beam steel end 3 is fixedly connected with one end of the concrete beam 4, the other end of the concrete beam 4 is fixedly connected with the beam steel tail end 5, and the beam steel tail end 5 runs through with or without bonded prestressing tendons 7, without bonded prestressing tendons 7. One end of the stress tendon 7 is anchored to the beam steel tail end 5 through the anchorage 8, and the other end of the unbonded prestress tendon 7 respectively runs through the concrete beam 4 and the beam steel end 3 and is detachably connected with the box block assembly; the bottom of the column mechanism The end is fixedly connected with a supporting component. The column top sealing plate 14 is also detachably connected to the steel box concrete 16 through the anchor 8 and the unbonded prestressed tendon 7 . Both the inner cavity of the inner steel pipe 12 and the inner cavity of the outer steel pipe 9 are filled with concrete to form a steel tube concrete column, which improves the overall strength.

Furthermore, the unbonded prestressed tendons 7 can be pre-embedded in the factory without on-site threading, which saves a lot of time for drilling and threading. At the same time, the column top sealing plate 14 is detachably connected to the prestressed tendon hole opened on the top surface of the steel box concrete 16 through the anchorage 8, the unbonded prestressed tendon 7, and the column mechanism and the supporting component jointly form a self-resetting steel pipe concrete Columns, and the unbonded prestressed tendons 7 are also pre-embedded in the factory, without the need for on-site threading, which saves a lot of time for opening holes and threading.

Further, the beam steel end 3 is a connecting piece in which several steel plates and I-shaped plates are welded to each other, which is a prior art and will not be repeated here.

The utility model can provide a prefabricated and assembled friction energy-dissipating steel pipe coagulation column mechanism and concrete beam 4 self-resetting joints, which solves the problem that the beam will have a large residual deformation under the action of an earthquake, which leads to structural damage; solves the problem of steel pipe coagulation The column mechanism and the concrete beam 4 are difficult to construct on site, the workload is large, and the installation efficiency of the nodes is low. Provide prefabricated and assembled self-resetting steel tube concrete column foot structure, which solves the problem of avoiding obvious plastic deformation of the steel tube concrete column mechanism when the earthquake is strong; solves the problem of column mechanism and concrete foundation and prestressed tendon tension anchorage Concrete crushing and spalling and damage to the integrity of the structure may occur at the contact surface due to excessive relative rotation.

To further optimize the scheme, the column mechanism includes an outer steel pipe 9 and an inner steel pipe 12, and the inner wall of the outer steel pipe 9 and the outer surface of the inner steel pipe 12 are fixedly connected by a number of inner reinforcement ribs 11, and the outer surface of the outer steel pipe 9 is fixedly connected with a number of outer reinforcement ribs The plate 10 and the outer reinforcing rib 10 are fixedly connected with the box block assembly; the top surface and the bottom surface of the outer steel pipe 9 are fixedly connected with a column top sealing plate 14 and a column bottom sealing plate 13 respectively. The bottom surface of the column bottom sealing plate 13 is fixedly connected with the support assembly. The box block assembly includes a box-shaped connecting block 1 and several vertical connecting plates 2, one end of several vertical connecting plates 2 is fixedly connected with an end surface of box-shaped connecting block 1, and several vertical connecting plates 2 are arranged at equal intervals; NAO friction plates are fixedly connected between the adjacent vertical connecting plates 2; the other end of the vertical connecting plates 2 is fixedly connected with the end 3 of the beam steel. The contact surface friction between the NAO friction plate (asbestos-free organic friction plate) and the beam steel end 3 is used to realize the node energy dissipation capacity.

Further, the connection between the beam steel end 3 and the vertical connecting plate 2 is fixed by several high-strength bolts 6, which improves the tensile strength between the connecting parts.

To further optimize the scheme, the supporting components include steel box concrete 16 and base 17, the bottom surface of steel box concrete 16 is fixedly connected with the top surface of base 17, and the two ends of the top surface of steel box concrete 16 are respectively fixed with anti-skid pads 15, two anti-skid pads 15 sides, the top surface of the steel box concrete 16 are fixedly connected with the column bottom sealing plate 13 respectively. The base 17 is a steel box structure. The steel box concrete 16 can prevent the phenomenon of concrete crushing and spalling and damage to the integrity of the structure at the contact surface of the tensioned anchorage end of the unbonded prestressed tendon 7 due to excessive relative rotation, and at the same time play a role in connecting with the superstructure. It can be directly manufactured in the prefabrication factory, avoiding the pouring of concrete foundation on site, and improving the efficiency of construction. The anti-slip cushion block 15 avoids the phenomenon that the steel tube concrete column is subjected to excessive stress and excessive displacement under the action of an earthquake. The unbonded prestressed tendon 7 provides self-resetting capability and can bear part of the bending moment under earthquake action.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model, rather than Any indication or implication that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should not be construed as limiting the invention.

The above-mentioned embodiment is only to describe the preferred mode of the present utility model, not to limit the scope of the present utility model. The various deformations and improvements mentioned above should all fall within the scope of protection determined by the claims of the present utility model.

Claims (7)

1. A self-resetting node and self-resetting column foot structure that can be prefabricated is characterized in that it includes a column mechanism and a concrete beam (4), and the sides of the column mechanism are respectively fixedly connected with some box assemblies, and the box One end of the block assembly is screwed with a beam steel end (3), and the beam steel end (3) is fixedly connected with one end of the concrete beam (4), and the other end of the concrete beam (4) is fixedly connected with a beam steel tail end ( 5), the beam steel tail end (5) runs through with or without bonded prestressed tendons (7), and one end of the unbonded prestressed tendons (7) passes through the anchorage (8) and the beam steel tail end (5 ) anchor connection, the other end of the unbonded prestressed tendon (7) respectively runs through the concrete beam (4), the beam steel end (3) and is detachably connected with the box block assembly; the column mechanism The bottom end is fixedly connected with a supporting component. 2. A self-resetting node and self-resetting column foot structure that can be prefabricated and assembled according to claim 1, characterized in that: the column mechanism includes an outer steel pipe (9) and an inner steel pipe (12), and the outer steel pipe (9) The inner wall and the outer surface of the inner steel pipe (12) are fixedly connected by a number of inner reinforcement ribs (11), and the outer surface of the outer steel pipe (9) is fixedly connected with a number of outer reinforcement ribs (10), The outer reinforcing ribs (10) are fixedly connected to the box assembly; the top and bottom surfaces of the outer steel pipe (9) are fixedly connected with a column top sealing plate (14) and a column bottom sealing plate (13), respectively, The bottom surface of the column bottom sealing plate (13) is fixedly connected with the support assembly. 3. A self-resetting node and self-resetting column base structure that can be prefabricated and assembled according to claim 2, characterized in that: the box block assembly includes a box-shaped connecting block (1) and several vertical connecting plates ( 2), one end of several said vertical connecting plates (2) is fixedly connected with one end face of said box-shaped connecting block (1), and several said vertical connecting plates (2) are arranged at equal intervals; adjacent said NAO friction plates are fixedly connected between the vertical connecting plates (2); the other end of the vertical connecting plate (2) is fixedly connected with the beam steel end (3). 4. A self-resetting node and self-resetting column base structure that can be prefabricated and assembled according to claim 2, characterized in that: the support assembly includes a steel box concrete (16) and a base (17), and the steel box The bottom surface of the concrete (16) is fixedly connected with the top surface of the base (17), and the two ends of the top surface of the steel box concrete (16) are fixedly connected with anti-skid pads (15), and the two anti-skid pads (15) The side surface and the top surface of the steel box concrete (16) are respectively fixedly connected with the column bottom sealing plate (13). 5. A self-resetting node and self-resetting column foot structure that can be prefabricated and assembled according to claim 4, characterized in that: the column top sealing plate (14) also passes through the anchor (8), the The unbonded prestressed tendons (7) are detachably connected to the steel box concrete (16). 6. A self-resetting node and self-resetting column foot structure that can be prefabricated and assembled according to claim 2, characterized in that: both the inner cavity of the inner steel pipe (12) and the inner cavity of the outer steel pipe (9) are filled There is concrete. 7. A self-resetting node and self-resetting column base structure that can be prefabricated and assembled according to claim 4, characterized in that: the base (17) is a steel box structure.

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