JPH044091Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention is mainly used for steel frames used as small beams.
It concerns beams in reinforced concrete structures.

Problems that the invention aims to solve In steel frame and reinforced concrete structures, columns,
After the steel frames for the main beams were erected, the reinforcing bars for the small beams were placed. For small beams, after pouring concrete for each floor, scaffolding is erected from the lower floor or floor forms are assembled, and reinforcement work is carried out later. Conventional reinforcing for small beams like this requires time and effort to assemble by wrapping the beam reinforcing bars with stirrups on site, which tends to cause twisting and reduce the accuracy of bar arrangement, and requires temporary reinforcement to prevent sagging. There were drawbacks such as:

This idea was created by focusing on the above-mentioned problems. The purpose is to reduce the number of man-hours required for reinforcing.
Furthermore, the present invention aims to propose a beam that can improve the precision and rigidity of assembled members arranged with reinforcement.

Means for Solving the Problems The details of this invention will be explained below with reference to illustrated embodiments.

In the figure, A indicates a small beam and B indicates a large beam. This small beam A has angle irons 1, 1 arranged at the two upper corners of the cross section of the beam, leaving a required cover thickness. This angle iron 1 has two orthogonal faces facing horizontally and vertically, respectively, and the corner portions facing outward and downward. Also, leave the required cover thickness at the two lower corners and insert the flat bar 2,
2 are arranged vertically, and upper and lower beam reinforcing bars 3 are arranged in the middle, and reinforcing bars 4 are arranged in the middle between the beams as necessary. U-shaped reinforcing bars 5 are welded diagonally in a lattice shape to the lower side of the periphery of the angle irons 1, flat bars 2, and beam reinforcing bars 3, 4 arranged in this way, and the two parallel angle irons 1, 1 are connected by strip-shaped connecting reinforcements 6 diagonally arranged on the upper surface thereof. Note that these strip-shaped connecting bars may be arranged in parallel depending on the situation.

When constructing the above-mentioned small beam A over the main beam B, extend the angle iron 1 at the upper corner, place it on the beam steel frame 7 of the main beam B, and place the small beam angle iron on the flange of the beam steel 7. The connection is made using a mounting angle iron 12 attached to the end. Further, the flat steel 2 at the lower corner is coupled to a gusset plate 8 protruding from the side surface of the beam steel frame 7.
Note that the girder reinforcing bars 10 are stirrups. The assembly materials arranged for the above-mentioned large beams B and small beams A are buried in concrete 11.

Function/Effect This invention consists of the above structure. This beam has two angle irons at the upper corners and a flat bar at the lower corner, welded together in a lattice shape with U-shaped reinforcing bars, and the upper surface is fixed and reinforced with connecting bars, so the assembled material is rigid. is high;
The use of angle iron further increases the rigidity in the out-of-plane direction, prevents the beam from sagging, and prevents twisting.
The accuracy of assembly can be improved. During assembly, it can be prefabricated at a steel frame factory, etc., improving accuracy and assembly efficiency.
The beams can be installed at the same time as the steel frame is being erected, making it extremely easy to construct.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the joint between the beam and the girder of this invention, Fig. 2 is a sectional view of the beam, and Fig. 3 is a plan view of the reinforcement of the beam. 1... angle iron, 2... flat steel, 3... beam reinforcing bar, 4
...Reinforcing bar, 5...U-shaped reinforcing bar, 6...Connecting bar, 7
... Beam steel frame, 8 ... Gusset plate, 9 ... Beam reinforcement, 10 ... Stirrup, 11 ... Concrete, 12 ... Angle steel for installation.

Claims (1)

[Scope of utility model registration request] An angle steel is placed in the two upper corners of the beam cross section with its perpendicular surfaces facing horizontally and vertically, respectively.
Flat bars are arranged in the two lower corners with their faces facing vertically, beam reinforcing bars are arranged in the middle, and U-shaped reinforcing bars are placed on the lower side around the angle bars in the two upper corners and the flat bars in the lower corner. A beam characterized by being welded in a lattice shape, connecting two angle irons with connecting reinforcements placed on the upper surface, and being embedded in concrete.