CN213143379U

CN213143379U - Assembled concrete frame dry-type node of shaped steel bolted connection

Info

Publication number: CN213143379U
Application number: CN202020912797.3U
Authority: CN
Inventors: 黄洋; 郑晓燕; 王佑铭; 张席
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-05-07
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses an assembled concrete frame dry-type node of shaped steel bolted connection belongs to building technical field. The steel plate comprises a precast concrete beam, precast concrete upper and lower columns, angle steel with stiffening ribs and stud bolts. The prefabricated lower column is pre-embedded with a square steel pipe, the prefabricated upper column is pre-embedded with a steel slot, the end of the prefabricated beam is pre-embedded with a flat steel, and holes in all prefabricated components are formed by pre-embedded thin-wall round steel pipes. When the on-site node assembly is carried out, the upper column is moved firstly, so that the steel pipe below the lower column is inserted into the embedded steel slot of the upper column, and then the upper column and the lower column are installed and fixed by bolts; and then, beam column splicing is carried out, the precast beam is translated, the bolt hole at the beam end is aligned with the angle steel preformed hole of the upper column and the lower column, and the precast beam is installed and fixed by using bolts. This connection advantage: the components can be prefabricated in a factory, and the quality efficiency is easy to guarantee; only bolts are needed for installation and fixation, and no wet operation is carried out on site; the connection adaptability is strong, the number of the beams is increased or decreased only in the conversion of the frame edge nodes and the middle nodes, and the connection structure is not required to be changed.

Description

Assembled concrete frame dry-type node of shaped steel bolted connection

Technical Field

The utility model belongs to the technical field of the building, especially, relate to a shaped steel bolted connection's assembled concrete frame dry-type node.

Background

In order to realize transformation and upgrade of the construction industry, the prefabricated concrete structure is greatly popularized by the nation. The frame structure is used as a main structure system of the fabricated concrete, and the node connection of the frame structure plays a key role in the overall performance of the structure. The node connection of the existing fabricated concrete frame structure mainly adopts wet connection, concrete needs to be poured in situ, and the installation and positioning of reinforcing steel bars in a node area are very complicated; the existing dry connection node has the problems of insufficient connection bearing capacity, insufficient connection ductility, influence on building use functions and the like, and restricts the large-area application of the dry connection node. Therefore, the fabricated concrete frame dry type connection node with good comprehensive performance is required for practical engineering.

Disclosure of Invention

For solving the background art the problem, the utility model provides a component all can be prefabricated, the installation is simple, on-the-spot no wet operation, connection strong adaptability's assembled concrete frame dry-type node of shaped steel bolted connection.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a fabricated concrete frame dry-type node connected by section steel bolts comprises a precast concrete lower column, a precast concrete upper column, a precast concrete beam, angle steel with stiffening ribs and stud bolts, wherein a square steel pipe is pre-embedded in the precast lower column, steel slots are pre-embedded in the precast upper column, flat steel is pre-embedded in the precast beam end, and holes in all precast components are formed by pre-embedded thin-wall round steel pipes; the lower column and the upper column are connected through a lower column embedded square steel pipe and an upper column embedded steel slot, the precast concrete beam, the precast concrete lower column and the precast concrete upper column are connected through angle steel with stiffening ribs, flat steel is embedded in the end portion of the precast beam in a vertically symmetrical mode, and the nodes are connected and fixed on site through double-headed bolts.

Preferably, the width of the angle steel with the stiffening ribs is equal to that of the precast beam.

Preferably, the embedded thin-wall round steel pipe is used as a hole forming device, and the wall thickness of the embedded thin-wall round steel pipe is one millimeter.

Preferably, the precast beam end flat steel is welded and fixed on the beam end longitudinal rib.

Preferably, the longitudinal bars and the stirrups of the lower prefabricated column, the upper prefabricated column and the prefabricated beam are normally arranged in the connecting section, and the embedded parts are all placed in the reinforcement cage.

The utility model has the advantages that:

the components can be prefabricated in a factory, and the quality efficiency is easy to guarantee; only bolts are needed for installation and fixation, and no wet operation is carried out on site; the connection adaptability is strong, the number of the beams is increased or decreased only in the conversion of the frame edge nodes and the middle nodes, and the connection structure is not required to be changed.

Drawings

FIG. 1 is an external view of a fabricated concrete frame dry node connected by section steel bolts;

FIG. 2 is a perspective view of a fabricated concrete frame dry node with steel bolts;

in the figure: 1-precast concrete lower column, 2-precast concrete upper column, 3-precast concrete beam, 4-angle steel with stiffening rib, 5-stud bolt, 6-square steel pipe, 7-steel slot, 8-flat steel and 9-thin-wall round steel pipe.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to the attached

drawings

1 and 2, the dry type joint of the steel bolt connection assembly type concrete frame comprises the following components: the prefabricated concrete beam comprises a prefabricated concrete lower column 1, a prefabricated concrete upper column 2, a prefabricated concrete beam 3, angle steel 4 with stiffening ribs and stud bolts 5, wherein a square steel pipe 6 is embedded in the prefabricated lower column, steel slots 7 are embedded in the prefabricated upper column, flat steel 8 is embedded in the end of the prefabricated beam, and reserved holes in all prefabricated parts are formed by embedded thin-wall circular steel pipes 9.

The manufacturing and construction requirements of the components are as follows: the method comprises the following steps that all components are manufactured in a prefabricated component factory, when a prefabricated concrete lower column 1 is prefabricated, a reinforcement cage is bound according to the designed reinforcement arrangement, a lower column embedded square steel pipe 6 and the reinforcement cage are welded and fixed through thin steel bars, bolt holes are formed by embedded thin-wall round steel pipes 9, after templates and the like are ready, concrete can be poured, and then the components are maintained; the basic process of prefabricating the precast concrete upper column 2 is the same as that of the lower column, the outer side of the embedded steel slot 7 is welded and fixed with the upper column longitudinal rib, and the bolt hole is still formed by means of the embedded thin-wall round steel pipe 9, so that the embedded square steel pipe of the lower column can be smoothly inserted into the upper column slot, and the thin-wall steel pipe (a hole forming device) needs to be disconnected at the embedded steel slot; the precast concrete beam 3 needs to pay attention to embedding of the flat steel 8 when being precast, the flat steel is arranged on the beam section in an up-and-down symmetrical mode, and the embedded flat steel is used for facilitating welding and anchoring of longitudinal bars at the beam end in the precast beam, so that internal force of a node area can be smoothly transmitted. The embedded flat steel at the end part of the precast beam is welded and fixed on the longitudinal bar at the end part of the beam; the width of the angle steel 4 with the stiffening ribs is taken as the beam width, all steel members are punched in advance according to design drawings, and the positioning accuracy of holes is ensured.

And (3) on-site assembling of the nodes: in order to reduce the on-site splicing workload, after the lower column is demoulded, the angle steel with the stiffening ribs is fixedly installed at the column end of the lower column by using bolts, when on-site node splicing is carried out, the upper column is moved firstly, so that the square steel pipe extending out of the lower column is inserted into the embedded steel slot 7 of the upper column, and then the upper and lower columns and the angle steel 4 with the stiffening ribs of the upper column are fixedly installed by using bolts; and then, beam column splicing is carried out, the precast beam is translated, the bolt hole at the beam end is aligned with the angle steel preformed hole of the upper column and the lower column, and the precast beam is installed and fixed by using bolts.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dry-type node of an assembly type concrete frame connected by section steel bolts comprises a precast concrete lower column (1), a precast concrete upper column (2), a precast concrete beam (3), angle steel (4) with stiffening ribs and stud bolts (5), wherein a square steel pipe (6) is pre-embedded in the precast concrete lower column (1), a steel slot (7) is pre-embedded in the precast concrete upper column (2), flat steel (8) is pre-embedded at the end of the precast concrete beam (3), and holes in each precast component are formed by pre-embedded thin-wall round steel pipes (9); the method is characterized in that: the connection of the precast concrete lower column (1) and the precast concrete upper column (2) adopts a precast concrete lower column (1) embedded square steel pipe (6) and a precast concrete upper column (2) embedded steel slot (7); the connection of the precast concrete beam (3), the precast concrete lower column (1) and the precast concrete upper column (2) adopts angle steel (4) with stiffening ribs; flat steel (8) is symmetrically embedded in the upper part and the lower part of the end part of the precast concrete beam (3); and the stud bolts (5) are adopted for field connection and fixation.

2. A section bolted fabricated concrete frame dry node according to claim 1, characterized in that the width of the angle steel with stiffening ribs (4) is taken to be the same width as the precast concrete beam (3).

3. A profiled bolted fabricated concrete frame dry node as claimed in claim 1, characterised in that pre-embedded thin walled circular steel tubes (9) act as pore formers, the wall thickness of which is taken to be one millimetre.

4. A section bolted assembled concrete frame dry node according to claim 1, characterized in that the precast beam end flats (8) are welded to the beam end longitudinal bars.

5. A section steel bolted assembled concrete frame dry node according to claim 1, characterized in that the longitudinal and hoop reinforcement of the precast concrete lower column (1), the precast concrete upper column (2) and the precast concrete beam (3) are normally arranged at the connection section, and the embedded parts are all placed in the reinforcement cage.