JPH0532534U - Construction girder material - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a construction girder material that is lightweight, has high rigidity, and has little bending when a load is applied. [Structure] The plates 3 are arranged inside the lightweight box-shaped steel 2 with a predetermined space therebetween. A through hole is provided at a predetermined position in each partition plate 3 so that the piano wire 5 inserted into the box-shaped steel 2 through the through hole is in a curved state. Then, the piano wire 5 is pulled and fixed to both ends of the box-shaped steel 2 to cause the box-shaped steel 2 to generate a prestressed moment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lightweight construction girder material useful as a girder material / beam material for a concrete structure.

[0002]

[Prior Art]

 As girders and beams in concrete structures, I-shaped steel and H-shaped steel are often used. However, the above-mentioned shaped steel is weak against a load in the direction perpendicular to the longitudinal direction, for example, a load in the vertical direction on a beam installed horizontally, and is liable to cause bending or vibration. In addition, the floor may be curved due to the deflection of the beam.

Therefore, when the rigidity and proof strength of the beam are insufficient, conventionally, it has been necessary to reinforce by using a reinforcing plate to increase the rigidity, or to adjust the number and intervals of columns to deal with the problem. However, there was a problem in terms of construction conditions or financial aspects.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide a construction girder material which is lightweight, has high rigidity, and has little bending when a load is applied.

[0005]

[Means for Solving the Problems]

 The gist of the present invention, which has solved such a problem, is to arrange a plurality of separating plates having one or a plurality of through-holes at predetermined intervals inside a hollow box-shaped steel, and to provide one or more steel wire rods through the through-holes. It is a construction girder material characterized in that it is inserted into a box-shaped steel in a curved state, and the steel wire rod is pulled and fixed to both ends of the box-shaped steel.

[0006]

[Action]

 Since the construction girder material according to the present invention uses a hollow, light-weight box-shaped steel, it is lightweight and has high rigidity, and is unlikely to be distorted in either direction. Further, the steel wire rod inserted inside the box-shaped steel is pulled in a curved state and fixed at both ends of the box-shaped steel. In other words, the steel wire is always in a tension state and has a restoring force that tries to restore it to a straight line. Then, the respective restoring plates are constantly pressed by the restoring force, and a prestressed moment is generated over the entire box-shaped steel. Therefore, if the steel wire is stretched so as to resemble the distribution diagram of the bending moment due to the load when the box-shaped steel is used, the bending moment and the shearing force can be canceled against the applied load.

[0007]

【Example】

 Examples will be described with reference to the following drawings. 1 is an overall view showing an embodiment, FIG. 2 is an explanatory view of the same section, FIG. 3 is a perspective view showing an example of a separating plate, FIG. 4 is a plan view showing an embodiment, and FIGS. FIG.

In the construction girder material 1 of the present embodiment, the plates 3 are arranged at equal intervals over the entire inside of the hollow lightweight box-shaped steel 2. The separating plate 3 has an I-shaped cross section as shown in FIG. 3, and each has a through hole 4 at a predetermined position. A pipe 6 for guiding a piano wire 5 to be inserted is attached to the through hole 4 so as to prevent loss of tension force due to friction of the piano wire 5 and cutting of the piano wire.

The piano wire 5 inserted through the pipes 6 of the separating plates 3 arranged inside the box-shaped steel 2 is pulled and fixed to the separating plates 7 at both ends of the box-shaped steel 2. At this time, the piano wire 5 is curved so as to be similar to the distribution diagram of the bending moment due to the acting load W when the building girder material 1 is used.

Further, in this embodiment, triangular rib grooves 13 are formed on the side wall of the box-shaped steel 2. As a result, the strength of the box-shaped steel 2 is further increased, and it is difficult for the box-shaped steel 2 to bend under the vertical load received as a girder / beam. Of course, the shape of the rib groove 13 is not limited to the triangular shape, and may be an arc shape.

Therefore, the construction girder material 1 configured as in this embodiment is particularly useful as a beam to which a load is applied in the vertical direction due to the press rest moment by the piano wire and the rib groove processing on the side wall of the box-shaped steel. Does not cause bending or vibration.

Further, despite having the properties useful as a beam as described above, the construction girder material 1 of this embodiment is much lighter in weight than the conventional concrete member. An U-shaped support member 8 having an upward opening as shown in FIG. 5 is attached to the girder material 11 of the wall surface 10 of the building 9, fitted into the opening of the support member 8 and fixed by tacking or welding. It is possible to form a floor having sufficient strength by stretching the foamed concrete board 12 and the like above and below the building member 1 which is erected.

Therefore, in a condominium or the like, a great effect is exerted when the floor space is increased by utilizing the blow-out space or the like. In other words, unlike the floor expansion method by placing concrete, there is no need to assemble a formwork or inject concrete, so that construction is easy and the construction period and cost can be greatly reduced.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it was possible to provide a construction girder material having a sufficient rigidity while being lightweight. In addition, since it acts to cancel the moment and shearing force generated by the load received as a building girder material, it is very useful when used as a beam because it does not easily cause bending or vibration. Moreover, unlike conventional concrete members, operations such as assembling and disassembling the mold are not required, and the manufacture thereof is easy. In addition, in the case of floor expansion work where the living space is the site, the construction girder material of the present invention can be used to simplify and shorten the construction time compared to the conventional floor expansion method using concrete. it can.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment.

FIG. 2 is a sectional explanatory view showing an example.

FIG. 3 is a perspective view showing an example of a separating plate.

FIG. 4 is a plan view showing an example.

FIG. 5 is an explanatory diagram showing a usage example.

FIG. 6 is an explanatory diagram showing a usage example.

[Explanation of Codes] 1 Girder material for construction 2 Box steel 3 Separation plate 4 Through hole 5 Piano wire 6 Pipe 7 Separation plate 8 Supporting member 9 Building 10 Wall surface 11 Girder material 12 Foam concrete plate 13 Rib groove

Claims (1)

[Scope of utility model registration request] 1. A plurality of partition plates having one or a plurality of through holes are arranged inside a hollow box-shaped steel at predetermined intervals, and one or a plurality of steel wire rods are curved in the box-shaped steel through the through holes. It is a construction girder material that is inserted in the state and pulled the steel wire rod and fixed to both ends of the box-shaped steel.