CN216740016U - Cold-formed thin-wall steel keel for assembled concrete beam - Google Patents

Abstract

The utility model belongs to the field of civil engineering, in particular to a cold-formed thin-walled steel keel for an assembled concrete beam, comprising a prefabricated concrete beam-column joint, cast-in-place concrete, two C-shaped cold-formed thin-walled steel, longitudinal bars, Stirrups, Grouting Sleeves, Steel Plates, Shooting Nails. Two C-shaped cold-formed thin-walled steels are connected by two rows of shooting nails to form a keel. At the assembly connection, steel plates are added to the web and the upper and lower flanges and connected with shooting nails. The longitudinal reinforcement is passed through the grouting sleeve. The stirrups and the longitudinal reinforcement are connected by binding. The assembled node of the cold-formed thin-walled steel keel concrete beam provided by the utility model has the advantages of simple assembly, less weakening of the steel plate and steel frame by the nailing connection, reliable connection performance and better assembly effect.

Description

A cold-formed thin-walled steel keel for fabricated concrete beams

technical field

The utility model belongs to the technical field of civil engineering construction, in particular to a cold-formed thin-walled steel keel used for an assembled concrete beam.

Background technique

Profiled steel concrete has the advantages of large bearing capacity, high stiffness, good seismic and fire resistance, and good local and overall structural stability; while prefabricated structures have the advantages of high production efficiency, green environmental protection, and conducive to sustainable development. At present, the prefabricated steel concrete is mostly welded and reinforced with steel plates and bolts at the joints, and the steel bars are connected by binding. There are problems such as self-heavy profile steel concrete, small steel bar diameter and low strength, which lead to complex reinforcement and numerous construction procedures when prefabricated components are assembled and connected on site, which is not conducive to ensuring the construction quality of concrete components.

Utility model content

The utility model provides a cold-formed thin-walled steel keel for an assembled concrete beam, and the specific scheme is as follows:

A cold-formed thin-walled steel keel for prefabricated concrete beams, comprising prefabricated concrete beams, cast-in-place parts, C-shaped cold-formed thin-walled steel, longitudinal reinforcement, stirrups, grouting sleeves, steel plates and nails;

Two rows of mounting holes are arranged on the web of the C-shaped cold-formed thin-walled steel;

The two C-shaped cold-formed thin-walled steels are arranged back-to-back, and are connected into an I-shaped steel keel by shooting nails;

One end of the two steel keels are arranged opposite to each other, and a steel plate is arranged at the connection between the C-shaped cold-formed thin-walled steel web and the upper and lower flange plates, and the steel plate is fixed on the web and the upper and lower flange plates by shooting nails, thereby forming a steel plate. Fixed connection between keels;

The other ends of the two steel keels are respectively arranged in the precast concrete beam-column joint and the precast concrete beam;

The prefabricated concrete beam-column joint and the prefabricated concrete beam are symmetrically provided with longitudinal bars, which are arranged in parallel with the two steel keels, and the stirrups and the longitudinal bars are connected by binding;

Two symmetrical longitudinal bars are connected together by grouting sleeves;

The longitudinal reinforcement, the grouting sleeve and the stirrup form a reinforcement cage, and concrete is poured in-situ in the cage cavity formed by the reinforcement cage.

The preferred solution of the cold-formed thin-walled steel keel for prefabricated concrete beams is that the longitudinal bars are large-diameter stressed longitudinal bars.

The preferred solution of the cold-formed thin-walled steel keel for prefabricated concrete beams is the depth at which the longitudinal bars are inserted into precast concrete beam-column joints and precast concrete beams and the length of their precast concrete beam-column joints and precast concrete beams. same.

The preferred solution of the cold-formed thin-walled steel keel for prefabricated concrete beams is that the steel plates connecting the upper and lower flange plates of the two steel keels and the edges of the upper and lower flange plates are on the same horizontal line.

The preferred solution of the cold-formed thin-walled steel keel for prefabricated concrete beams is that the steel plates on the webs of the two steel keels are provided with three rows of installation holes.

The beneficial effects of the utility model are as follows: the utility model adopts a steel keel composed of two C-shaped cold-formed thin-walled section steels connected by shooting nails to replace the section steel, and adopts large-diameter high-strength steel bars, on the basis of ensuring structural safety, effectively The self-weight of the profiled steel concrete beam is greatly reduced, and the steel is saved at the same time; the difficulty of assembling the joint is reduced, the construction is convenient, and the structural economy is better. The cold-formed thin-walled steel keel is connected with steel plates and shooting nails, and the large-diameter steel bars are connected with grouting sleeves, which not only ensures the structural strength, but also reduces the construction difficulty.

Description of drawings

Fig. 1 is a kind of three-dimensional schematic diagram of cold-formed thin-walled steel keel used for prefabricated concrete beam;

Fig. 2 is a kind of front view of cold-formed thin-walled steel keel used for prefabricated concrete beam;

Figure 3 is a top view of a cold-formed thin-walled steel keel for an assembled concrete beam;

Fig. 4 is a cross-sectional view of a cold-formed thin-walled steel keel 1-1 for an assembled concrete beam.

In the picture: 1- precast concrete beam-column joint, 2- cast-in-place concrete, 3- C-type cold-formed thin-walled steel, 4- longitudinal reinforcement, 5- stirrup, 6- grouting sleeve, 7- steel plate, 8- shot Nails, 9 - Precast concrete beams.

Detailed ways

As shown in Figure 1-4, a cold-formed thin-walled steel keel for prefabricated concrete beams includes a precast concrete beam 1, a cast-in-place part 2, a C-shaped cold-formed thin-walled steel 3, longitudinal bars 4, and stirrups 5. Grouting sleeve 6, steel plate 7 and shooting nail 8;

There are two rows of mounting holes on the web of the C-shaped cold-formed thin-walled steel 3;

The two C-shaped cold-formed thin-walled steel sections 3 are arranged back-to-back, and are connected to form an I-shaped steel keel by means of shooting nails 8;

One end of the two steel keels are arranged opposite each other, and a steel plate 7 is set at the connection between the C-shaped cold-formed thin-walled steel 3 web and the upper and lower flange plates, and the steel plate 7 is fixed on the web and the upper and lower flange plates by shooting nails 8. , so as to form a fixed connection between the steel keels;

The other ends of the two steel keels are respectively arranged in the precast concrete beam-column joint 1 and the precast concrete beam 9;

The prefabricated concrete beam-column joint 1 and the prefabricated concrete beam 9 are symmetrically provided with longitudinal bars 4, which are arranged in parallel with the two steel keels, and the stirrups 5 and the longitudinal bars 4 are connected by binding;

The two symmetrical longitudinal ribs 4 are connected together by a grouting sleeve 6;

The longitudinal bars 4, the grouting sleeves 6 and the stirrups 5 form a reinforcement cage, and the concrete 2 is poured in-situ in the cage cavity formed by the reinforcement cage.

The longitudinal rib 4 is a large-diameter stressed longitudinal rib.

The depth at which the longitudinal bars 4 are inserted into the precast concrete beam-column joint 1 and the precast concrete beam 9 is the same as the length of the precast concrete beam-column joint 1 and the precast concrete beam 9 .

The steel plate 7 connecting the upper and lower flange plates of the two steel keels is on the same horizontal line with the edges of the upper and lower flange plates.

The steel plates 7 on the webs of the two steel keels are provided with three rows of mounting holes.

Claims (5)

1. The utility model provides a thin-walled cold-formed steel fossil fragments for assembled concrete beam which characterized in that: the cast-in-place concrete beam comprises a precast concrete beam, a cast-in-place part, C-shaped cold-formed thin-wall section steel, longitudinal bars, stirrups, grouting sleeves, steel plates and shooting nails;

two rows of mounting holes are formed in a web plate of the C-shaped cold-formed thin-walled steel;

the two C-shaped cold-formed thin-walled steel plates are arranged back to back and are connected into an I-shaped steel keel through a shooting nail;

one end heads of the two steel keels are oppositely arranged, steel plates are arranged at the joints of the C-shaped cold-formed thin-wall steel web plate and the upper and lower flange plates, and the steel plates are fixed on the web plate and the upper and lower flange plates through shooting nails, so that the fixed connection among the steel keels is formed;

the other ends of the two steel keels are respectively arranged in the precast concrete beam column joint and the precast concrete beam;

longitudinal bars are symmetrically arranged in the precast concrete beam column joints and the precast concrete beam and are arranged in parallel with the two steel keels, and the stirrups and the longitudinal bars are connected by binding;

the two longitudinal ribs which are symmetrical up and down are connected together through the grouting sleeve;

the longitudinal bars, the grouting sleeves and the stirrups form a reinforcement cage, and concrete is cast in situ in a cage cavity formed by the reinforcement cage.

2. A cold-formed thin-walled steel runner for fabricated concrete beams as claimed in claim 1, wherein: the longitudinal ribs are large-diameter stressed longitudinal ribs.

3. A cold-formed thin-walled steel runner for fabricated concrete beams as claimed in claim 1, wherein: the depth of the longitudinal bar inserted into the precast concrete beam column joint and the precast concrete beam is the same as the length of the precast concrete beam column joint and the length of the precast concrete beam.

4. A cold-formed thin-walled steel runner for fabricated concrete beams as claimed in claim 1, wherein: the steel plate for connecting the upper flange plate and the lower flange plate of the two steel keels and the edges of the upper flange plate and the lower flange plate are on the same horizontal line.

5. A cold-formed thin-walled steel runner for fabricated concrete beams as claimed in claim 1, wherein: the steel plates on the two steel keel webs are provided with three rows of mounting holes.

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