JP2729543B2 - Beam framing method using oblique mesh bars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam framing method capable of reducing the labor required for beam construction by using oblique mesh streaks as stirrups and providing a beam structure having increased strength against oblique tension.

[0002]

2. Description of the Related Art In a steel bar or a steel reinforced concrete beam, if shear caused by oblique tension exceeds the load shearing force of concrete, a crack is formed, and it is necessary to arrange a stirrup for reinforcement around a main bar. However, not only time is required for on-site work, but also the cost is increased due to a shortage of skilled workers.

[0003]

In order to avoid this, it is conceivable to attach an ordinary reinforcing mesh around the main reinforcing bars, but this is not economical because it not only increases the weight but also increases the shear reinforcement more than necessary. For shear reinforcement, it is best to assemble many diagonals at a fixed pitch,
The present invention has been found to use oblique mesh streaks as stirrups, and has as its object to provide a beam framing method using diagonal mesh staves that is lightweight and low-cost.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a diagonal mesh streak by arranging small-diameter rebars in a cross at a constant pitch and welding intersections to form mesh voids on the entire surface. ; in the ground, assembled to cage the diagonal mesh muscle around the main reinforcement of the beam as stirrups, on the outside of the diagonal mesh muscle assembled in cage, making the beam assembly by assembling a discarded formwork; the beam Tatekomu to the beam construction site between the pillar and lifting the assembly, it said that.

[0005]

[Function] Around the main reinforcement of a steel or steel reinforced concrete structure beam, diagonal mesh reinforcement is arranged in a cage shape as a shear reinforcement, fixed by welding or binding, and after assembling a discarded formwork on the outside, it is lifted and built in. Cast concrete in place in the frame. In this way, the load of the main bars and formwork at the time of temporary construction can be shared by the mesh bars, and after the concrete is cast, the strength is increased against the diagonal tension applied to the beams and the structure has excellent earthquake resistance. Things.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. On the ground or in the factory, the oblique mesh bars 10 are assembled as stirrups around the main bars 15 of the beams in the form of a cage , assembled in the form of a cage , and the discard form 16 is assembled outside thereof to form a beam assembly in advance. FIG. 1 is a front view of an oblique mesh bar 10 used in the present invention, in which mesh bars 12 are formed on the entire surface by arranging reinforcing bars 11 having a diameter smaller than the beam main bar 15 at a constant pitch in a cross shape and welding intersections. Let me diagonal mesh streaks 1
0 and you.

[0007] Figure 2 illustrates a cross-section of the reinforcing bars Conch <br/> Lee preparative beams 14 for supporting the slab 13. Type discarded consisting corrugated thin steel plate such as keystone plate <br/> diagonal mesh muscle 10 around four sides on the outside thereof assembled in cage-like main reinforcement 15
The frame 16 is assembled, and a separator 17 is provided between the opposing disposal mold frames 16, 16. Frame members 23 are fixed to the upper and lower ends of each mold frame 16 to reinforce the strength in the corrugated direction. In the formwork 16, a holding member 18 such as a steel rod is arranged in the longitudinal direction substantially at the center of the beam member, the separator 17 is passed through the position of the holding member 18, and the main bar 15 and the oblique mesh bar are tightened by a nut 19. 10 and a beam assembly.

[0008] Making such concrete beam 14 described above, as described above, pre-assembled beam assembly on the ground Shah <br/> Nkuba 24, by lifting with a wire 25, girders 27
Build in without support in between (Figures 3 and 4 ). Next, the form 16 of the concrete beam 14 is
The support is set cast-in-place concrete in pouring and simultaneous girders 27 and slab 13 (FIG. 5). Beam assembly is the main reinforcement
Assemble the diagonal mesh streaks as stirrups around the cage,
Since the disposal form 16 is arranged on the outside,
It is strong and shares its load before concrete hardens.
Therefore, it is possible to reduce the number of supports just under the beam
It is possible. The oblique mesh streaks 10 are not limited to being formed in a closed basket , but may be bent into a U-shaped cross section and another oblique mesh streak may be attached to the upper surface. It may be arranged in a cage shape to form a cage . Although the reinforced concrete structure is shown in the illustrated example, it is needless to say that the present invention can be applied to a steel frame reinforced concrete structure.

[0009]

According to the present invention as described above the present invention, a diagonal mesh muscle entire surface to form a cross-diagonals by the entire surface to form a cross-diagonal members diagonally mesh muscle, rebar or steel reinforced concrete structures Around the beam main reinforcement, it is arranged in the form of a cage as a shear reinforcement, welded or bound and fixed, and after disposing the formwork on the outside, it is lifted and built, so the load of the main reinforcement and formwork at the time of temporary construction is mesh reinforcement. In this way, significant labor savings and systemization can be achieved compared to the conventional stirrup reinforcement method. In addition, after the concrete poured into the form has hardened, the strength increases against the diagonal tension applied to the concrete beam, and the shear force under vertical load and seismic load is greatly enhanced. Structure. Also, when the beam through-hole is provided, it is not necessary to arrange reinforcing bars around the beam as in the related art, and sufficient strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of an oblique mesh streak used in the present invention.

FIG. 2 is a cross-sectional view of a beam in which oblique mesh bars are assembled in a cage shape around a beam main bar.

FIG. 3 is a cross-sectional view of a state where a beam assembly using oblique mesh streaks is lifted.

It is a perspective view of FIG. 3. FIG.

FIG. 5 is a cross-sectional view when placing beam concrete.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Oblique mesh bar 11 Fine bar 12 Mesh void 14 Concrete beam 15 Beam main bar 16 Formwork 17 Separator 26 Support 27 Large beam

Claims (1)

(57) [Claims] 1. A slender mesh bar is formed at a constant pitch by arranging small-diameter reinforcing bars in a cross shape and welding intersections to form a mesh void on the entire surface to form a slanted mesh bar. assembling the cage as muscle, outside the diagonal mesh muscle assembled in cage, making the beam assembly by assembling a discarded formwork, it Tatekomu the beam construction site between the pillars by lifting the beam assembly A beam framing method using diagonal mesh bars characterized by