CN110056084A - Self-locking concrete-filled circular steel tube column node - Google Patents

Abstract

The invention discloses a self-locking circular steel tube concrete column node, comprising a prefabricated node and a circular steel tube concrete column; the prefabricated node is an integral node, the inner wall of the prefabricated node is sleeved with the outer wall of the circular steel tube concrete column; the prefabricated node is arranged vertically There is a two-way tapered hole, and the two-way tapered hole is provided with a node conical surface, and the two-way tapered hole is sleeved into the circular steel tube concrete column to a suitable height; the two-way tapered hole is provided with a clip component to fix it; the clip component is composed of the same three clips It is enclosed in a conical shape matching the conical surface of the node, and the inner side of the clip assembly is provided with threads to increase the occlusal force; the size of the bidirectional conical hole corresponds to the outer size of the conical shape formed by the three clips of the clip assembly. Compared with the common circular steel tube concrete column joint, the prefabricated joint has the advantages of simple construction, clear force transmission, no damage to the original column, and no influence on the concrete pouring in the column.

Description

Self-locking circular steel tube concrete column joint

technical field

The invention belongs to the field of construction engineering, in particular to a self-locking circular steel tube concrete column node.

Background technique

The connection between traditional circular steel tubular concrete columns and precast concrete beams mainly includes two categories: the first category is non-penetrating joints represented by reinforced ring joints, ring beam joints, steel surrounding joints, etc., and the second category is Corbel through-core nodes, steel bar through-center nodes, cross-plate nodes, etc. are represented by through-center nodes. The above two types of nodes represent the common practice of connecting circular CFST columns to various beams such as steel beams, reinforced concrete beams, and CFST beams. The above methods usually require a large number of welding operations on the column body, and even cause local damage to the column body ( such as perforations, openings, etc.). These methods are not only complex in structure, but also make the pouring of concrete in the column more difficult, and at the same time, there is a risk that the bearing capacity of the column will be reduced due to local failure of the column.

SUMMARY OF THE INVENTION

Based on the above situation, the present invention proposes a self-locking circular steel tube concrete column node, which adopts prefabricated components to be assembled on site, has simple structure and convenient construction, maximizes construction efficiency and is easy to control quality. At the same time, the node will not cause local damage to the column, nor will it have any impact on the pouring of concrete in the tube, which can ensure the safety of the main structure to the greatest extent and provide protection for people's lives.

In order to achieve the above purpose, the self-locking circular steel tube concrete column node provided by the present invention is characterized in that: it includes a prefabricated node and a circular steel tube concrete column; the prefabricated node is an integral node, and the inner wall of the prefabricated node is connected to the circular steel tube concrete column. The outer wall of the column is sleeved; the prefabricated node is vertically provided with a two-way conical hole, and the two-way conical hole is provided with a node conical surface, and the two-way conical hole is sleeved into the circular steel tubular concrete column to a suitable height. After the socket is completed, the top elevation of prefabricated node 1 should be consistent with the design elevation of the top surface of the floor slab, and the error should not be greater than 1cm, which is convenient for subsequent connection of beams and nodes and slab construction;

A clip assembly is provided under the bidirectional conical hole for fixing; the clip assembly is a conical shape surrounded by the same three clips and matched with the conical surface of the node, and the inner side of the clip assembly is provided with threads to increase bite force;

The size of the bidirectional conical hole corresponds to the outer size of the cone enclosed by the three clips of the clip assembly.

The advantages and beneficial effects of the present invention are as follows:

1) The connection between the node and the column is a jacket connection, which will not have any impact on the pouring of the concrete in the column, nor will it cause local damage to the column due to the node connection, which maximizes the safety of the main structure.

2) The vertical shear force transmission mechanism of the node is similar to the anchoring mechanism of the single-hole anchor. The vertical shear force transmitted by the beam end is converted into the hoop tension of the vertical section of the node through the clip anchor, which makes full use of the The steel has the advantages of good tensile performance, and the node force transmission mechanism is simple and clear.

3) The nodes are assembled on site by prefabricated components, and the dry connection methods such as clip anchoring and bolt connection are used for on-site connection, which has the advantages of convenience and speed, greatly improves the construction efficiency, and has a high degree of industrialization.

Description of drawings

FIG. 1 is an overall assembly effect diagram of a prefabricated node of the present invention.

Figure 2 is a perspective view of a prefabricated node of the present invention.

Fig. 3 is a longitudinal sectional view of a prefabricated node of the present invention.

FIG. 4 is a transverse sectional view of a prefabricated node of the present invention.

Fig. 5 is a cross-sectional view of a circular steel tubular concrete column of the present invention.

In the figure: prefabricated node 1, bidirectional conical hole 101, clip assembly 2, circular steel tube concrete column 3, circular steel tube 301, concrete 302.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in the figure, the self-locking CFST column node includes prefabricated node 1 and CFST column 3; Node 1 is vertically provided with a bidirectional conical hole 101, and the bidirectional conical hole 101 is provided with a node conical surface. The bidirectional conical hole 101 is inserted into the circular steel tubular concrete column 3 to a suitable height. The surface elevation should be consistent with the design elevation of the top surface of the floor slab, and the error should not be greater than 1cm, which is convenient for the connection of the subsequent beams and nodes and the construction of the floor slab; there is a clip component 2 under the two-way conical hole 101 for fixing; the clip component 2 is the same for the same reason The conical shape enclosed by the three clips and matching the conical surface of the node, the inner side of the clip assembly 2 is provided with threads to increase the occlusal force; the size of the bidirectional conical hole 101 is the same as the conical shape surrounded by the three clips of the clip assembly 2 The outer dimensions of .

The self-locking circular steel tube concrete column node of the present invention is constructed in the following steps:

The production of the CFST column: first, the outer circular steel pipe 301 is hoisted into place to ensure its verticality, and then the concrete 302 is poured and cured for 28 days to form the CFST column 3 . (①301 steel pipe: It is a common circular section steel pipe in the market. The material can be but not limited to ordinary Q235 steel, galvanized stainless steel and special steel, etc. ②302 concrete: It is generally a common commercial concrete on the market, and it can also be self-compacting concrete, steel, etc. Fiber concrete, self-stressed concrete, self-stressed self-compacting concrete, steel fiber self-stressed self-compacting concrete and recycled aggregate concrete and other special performance concrete.)

Node installation: Set the prefabricated node 1 into the CFST column 3 from top to bottom to a suitable height, pay attention to the lower part of the two-way conical hole 101 of the node, the upper part is smaller and the lower part is larger, and then insert the clip assembly 2 into the conical hole from the bottom. Apply downward force to the prefabricated joint 1, and the self-weight of the prefabricated joint 1 and the engagement of the threads ensure that the clip assembly 2 does not come out. Put the upper-layer CFST column 3 into the prefabricated node 1 and put the clip assembly 2 from top to bottom to complete the installation.

Claims (1)

1. a kind of self-locking concrete-filled circular steel tube column node, it is characterised in that: including prefabricated node (1) and concrete-filled circular steel tube column (3)；The prefabricated node (1) is integral type node, the inner wall of the prefabricated node (1) and concrete-filled circular steel tube column (3) it is outer Wall socket；The prefabricated node (1) is vertically provided with two-way conical bore (101), and node is equipped in the two-way conical bore (101) Circular conical surface, the two-way conical bore (101) are inserted in concrete-filled circular steel tube column (3)；

Clip assemblies (2) are equipped with below the two-way conical bore (101) with fixation；The clip assemblies (2) are by identical three The cone that intermediate plate surrounds and matches with node circular conical surface, clip assemblies (2) inside are provided with screw thread to increase occlusion Power；

The side dimension for the cone that the size of the two-way conical bore (101) and (2) three intermediate plates of the clip assemblies surround It is corresponding.