JP2569885Y2 - Structure of steel truss beam for SRC beam - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a structure of a steel truss beam for an SRC (steel reinforced concrete) beam.

[0002]

2. Description of the Related Art Conventional steel truss beams for SRC beams are
As shown in FIG. 6, since the truss reinforcing bar T of the beam was welded to the outside of the angle member S, when a force was applied to the truss reinforcing bar from the internal concrete, the welding was broken and the restraining force of the concrete was reduced. Or there was a risk of disappearing.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The purpose of the present invention is to surely and firmly secure a concrete binding force inside a beam. It is an object of the present invention to provide a structure of a steel truss beam for an SRC beam.

[0004]

The structure of the steel truss beam for the SRC beam of the present invention is such that angle members arranged in parallel at four corners toward the inside are integrally assembled with truss reinforcing bars or flat bars to form the steel truss beam. A truss reinforcing bar or a flat bar is welded to the inside of the angle member, a mounting plate is arranged at an appropriate position outside the angle member, and a floor half PCa plate is erected on the outer surface of the mounting plate. It is characterized by attaching a bracket.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a reinforced concrete column, 2 is a steel beam in the span direction, and 3 is a reinforced concrete shear wall.

The reinforced concrete column 1 is constructed by burying a pillar PCa member 4 at the center thereof, arranging a column reinforcing bar 1a around the pillar PCa member 4, and integrally casting column concrete. .

As shown in FIG. 2, the buried pillar PCa member 4 is a reinforced concrete rectangular pillar member having a height up to the lower part of the beam, and the outer peripheral surface of the pillar pillar PCa member 4 Cotter 4a
Are formed. A large-diameter reinforcing bar 4b is fixed at the center of the upper part of the column, and extends upward.

In FIG. 2, 4c is a support flange for receiving the end of the steel truss beam 5 of the steel concrete beam 2, 4d is a fixture for fixing the steel truss beam 5, 4e is a base plate, 4f Is a brace plate. The buried pillar PCa member 4 is not limited to the above-described prism, but may have any cross-sectional shape such as a cylinder or a polygonal pillar. The inside of the pillar PCa member 4 is reinforced with a tubular mesh bar or the like instead of a reinforcing bar. May be.

As shown in FIG. 1, a reinforced concrete column 1
At a suitable position in the earthquake-resistant wall 3 constructed between the slabs, a buried strut 6 for supporting the steel truss beam 5 is built. The steel truss beam 5 is suspended and erected on the buried pillar PCa member 4 and the buried pillar 6.

As is apparent from FIGS. 3 and 4, the steel truss beam 5 is obtained by integrally assembling angle members 5a arranged inward at four corners in parallel with truss reinforcing bars 5b and 5c. .

The truss reinforcing bars 5b and 5c are welded to positions inside the angle members 5a. The angle material 5
A side plate 5d is attached to an appropriate position outside of a, and a bracket 7 is attached to the outer surface thereof. As is clear from FIGS. 3 to 5, the floor half PCa plate 8 is erected on the bracket 7.

The bracket 7 is disposed at an appropriate position according to the dimensions of the floor half PCa plate 8. As shown by phantom lines in FIG. 4, eslenoids 8a are placed on the floor half PCa plate 8.
A hollow floor half PCa plate is formed by adding a member to the structure, and a structure that does not require a small beam in order to reduce the weight.

Mounting plates 5e and 5f are attached to the upper and lower surfaces of the ends of the steel truss beams 5, and holes pierced in these mounting plates 5e and 5f are fitted with the buried columns PCa.
The large-diameter reinforcing bar 4b of the member 4 is skewered from below and assembled. The mounting plate 5f is supported on the support flange 4c, and a fixture 4d is fastened to the upper surface of the mounting plate 5e to bury the steel truss beam 5 and fix it on the column PCa member 4.

Four anchor bolts 5g are implanted on the upper mounting plate 5e so as to fix the base plate 4e of the embedded pillar PCa member 4 on the upper floor. Side plates 5h are attached to both side surfaces of the end portion of the steel truss beam 5, and mounting bolts 5j are mounted on the side plates 5h so that the outer wall PCa member 9 is fixed.

The buried pillar PC assembled as described above
As shown in FIG. 1, around the a member 4, as shown in FIG. 1, a column reinforcement (1 a) is arranged, a column formwork (not shown) is erected, and a wall reinforcement 10 is arranged. As shown by the virtual line,
After setting the formwork 11, assembling the formwork 12 to the truss steel frame 5, and further arranging the slab streaks 13 on the floor half PCa plate 8, concrete is integrated with these columns, walls, beams and slabs. It is constructed by casting.

In FIG. 1, reference numeral 14 denotes a balcony PCa member which is supported by a supporter 15. The concrete is also cast on the floor of the balcony PCa member 14 to achieve integration.

The building having the above structure can be applied to either a conventional one-floor stacking method or a construction method of simultaneously constructing two floors. In the above embodiment, a steel concrete beam has been described. However, a steel reinforced concrete beam in which concrete is cast into a steel truss beam 5 may be used. Further, the angle members 5a may be assembled with flat bars instead of the truss reinforcing bars 5b and / or 5c of the steel truss beams 5.

[0018]

[Effect of the invention]

(1) Since the truss reinforcing bar or the flat bar is welded to the inside of the angle member, it is possible to reliably and firmly secure the concrete binding force inside the beam. (2) As a secondary effect of the present invention, the bracket can be arranged at an arbitrary position, and as a result,
A floor half PCa plate having an arbitrary width can be reliably and safely installed.

[Brief description of the drawings]

FIG. 1 is a construction diagram illustrating a structure of an embodiment of a building incorporating a steel truss beam of the present invention.

FIG. 2 is an explanatory diagram of a configuration of a buried pillar PCa member.

FIG. 3 is a plan view illustrating a structure and an assembled state of a steel truss beam.

FIG. 4 is an enlarged cross-sectional view taken along the line II in FIG. 3;

FIG. 5 is a side view illustrating a structure and an assembled state of a steel truss beam.

FIG. 6 is a perspective view showing the structure of a conventional steel truss beam.

[Description of Signs] 1 Reinforced concrete column 1a Column rebar 2 Steel concrete beam 3 Reinforced concrete shear wall 4 Buried pillar PCa member 4a Cotter 4b Large diameter rebar 4c Support flange 4d Fixing tool 4e Base plate 4f Brace plate 5 Steel frame truss beam 5a Angle material 5b truss reinforcing bar 5c truss reinforcing bar 5d side plate 5e mounting plate 5f mounting plate 5g anchor bolt 5h side plate 5j mounting bolt 6 buried strut 7 bracket 8 floor half PCa plate 9 outer wall PCa member

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Keiji Katayama 545-1 Higashiasakawa-cho, Hachioji-shi, Tokyo (56) References JP-A-58-207455 (JP, A) Actual opening 1974-122616 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] An angle member is arranged in parallel at four corners toward the inside, and a truss bar or a flat bar is welded to the inner surface of the angle member to form a steel truss beam. A structure of a steel truss beam for an SRC beam, wherein a mounting plate is mounted at a position, and a bracket for mounting a floor half PCa plate is provided on an outer surface of the mounting plate.