JPH076254B2 - Concrete reinforcing member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete reinforcing member which is suitable for use in place of reinforcing steel bars embedded in various concrete structures.

"Prior art" Among various concrete structures, for example, in the beams and columns of a building, in the concrete that forms the main body of them, the main reinforcement (axial reinforcement) has shear reinforcement reinforcements (belts, stirrups or spirals). Concrete reinforcing members such as reinforced steel frames are embedded.

[Problems to be Solved by the Invention] By the way, such a reinforcing member made of a reinforcing bar or the like has a relatively low material cost, and has appropriate strength. However, with the recent progress in building technology and civil engineering technology, there have been problems to be solved in the reinforcing member itself in the following points.

Reinforcing bars embedded in concrete structures such as beams and columns in a building are overlapped in a form in which the reinforcing bars intersect each other, resulting in a staggered structure. Being able to make different thicknesses.

Since the rebar itself has a considerable weight, the workability and transportability on site are poor, and it is extremely difficult to make a large-scale unit.

In the field, the work of binding the reinforcing bars together, welding and pressure welding work is extremely troublesome, and the construction period is prolonged accordingly.

Most of the rebar assembly work is done on site, and bending work becomes difficult when the diameter of the rebar becomes large, so it is difficult to improve the rebar assembly accuracy.

Since it is made of iron, it requires anti-corrosion measures during storage, and it also corrodes inside concrete, causing the phenomenon of concrete peeling.

[Means for Solving the Problems] Therefore, in the present invention, a reinforcing member embedded in a portion to be a concrete structure, wherein the reinforcing member is at least three three-dimensionally arranged at intervals. A spiral shape that passes through the same intersection points on the corner axis muscles in the clockwise and counterclockwise directions in the form of intersecting the corner axis muscles and the axis muscles around these corner axis muscles. A first and a second spiral line wound around the corner axis line, and the corner axis line and the first and second spiral lines are each formed of a flat fiber group in which a plurality of fibers are arranged in parallel. The fiber bundle and the fiber group of all of these fiber bundles are bound by a resin material, and the axial line, the first and second spiral lines are arranged in three directions. The intersection that intersects The flat fiber group that constitutes the corner axis and the flat fiber group that constitutes each spiral are cross-sectionally formed by alternately laminating at least three layers with each fiber group as a layer. It is a thing.

"Operation" Since the reinforcing member having the above-mentioned configuration is made of fiber and resin material,
While being extremely lightweight, it can be made as an integrated product in advance, which greatly contributes to workability and transportability on site, and also to large-scale unitization. Further, at least three layers are alternately laminated at the intersecting portion so that they intersect with each other, and since these are solidified with a resin material, the axial line and the spiral line have a stepless shape,
As a result, the covering thickness of concrete can be made uniform, which is suitable as a reinforcing member such as a pillar or a beam. Further, since the fiber has a structure coated with a resin, the fiber, which is the main strength member, has a high corrosion resistance and acts extremely advantageously as a structural material.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying FIGS. 1 to 7.

FIGS. 1 to 4 show an example in which the present invention is applied to a suitable quadrangular prismatic reinforcing member that is embedded in concrete that constitutes, for example, a pillar or beam of a building. In these figures, the reinforcing member indicated by reference numeral 1 as a whole is composed of four axial reinforcements 2 which are three-dimensionally arranged in parallel with each other at predetermined intervals, and the axial reinforcements around the axial reinforcements 2. Axial muscle 2 to the right and left in the form of intersecting 2
The first and second spirals that pass through the same intersection point (intersection portion A) above and form an intersection portion C between the axial lines 2 and are spirally wound.
It has a truss-like configuration including the spiral muscles 3 and 4, and the axial muscle 2 and the spiral muscles 3 and 4 are, as shown in FIG.
A plurality of fiber groups 5a each composed of a plurality of fibers 5
The fiber bundle T is made of (5b, 5c), and all the fibers of the fiber bundle T are bound by the resin material 6.

The intersection A of the axial reinforcement 2 and the first and second spiral reinforcements 3, 4 is, as shown in FIG. 4, a fiber group 5a that constitutes the axial reinforcement 2.
And the fiber groups 5b, 5c that make up each spiral muscle 3, 4 intersecting with
And has a cross-sectional shape in which at least three layers are alternately laminated. Further, at the intersection C of the first and second spirals 3 and 4, the respective fiber groups 5b and 5c are merged and integrated in an X shape, whereby the reinforcing member 1 as a whole has a step difference. It is formed into a rectangular column that is integrated into a so-called truss shape having the same thickness.

As the fiber 5 which is the main component of the reinforcing member 1, glass fiber or carbon fiber, which is lightweight and has high strength, is suitable, but if necessary, other fiber such as synthetic resin fiber, ceramic fiber, metal fiber, etc. You may use. Also, these fibers may be used in an appropriate combination.

Further, as the resin material 6 for binding the fibers 5 of the fiber bundle T, for example, vinyl ester resin or the like, which has good adhesiveness to the fibers 5 and has sufficient strength itself, is preferable. Other resin materials may be used depending on the type. Examples of other resin materials include unsaturated polyester resins, epoxy resins, and phenol resins.

The ratio of the fibers 5 to the resin material 6 is appropriately determined in consideration of the type and strength of the fibers 5 and the usage pattern of the reinforcing member 1. For example, the fibers 5 are glass fibers and the resin material 6 is used. Is a vinyl ester resin, it is preferable that the volume ratio of the fiber 5 is about 30 to 70%, and if the fiber 5 is, for example, carbon fiber, about 20 to 60%. When the ratio of the fibers 5 is not more than the above, the strength of the reinforcing member 1 is remarkably reduced. On the other hand, when the ratio of the fibers 5 is increased, a reinforcing member having a higher strength can be obtained, but when the ratio is too high, Carbon fibers, which are relatively expensive, are not preferable in terms of economy.

The reinforcing member 1 having such a structure can be manufactured using, for example, the apparatus shown in FIGS. 5 and 6. In the figure, 10 is a rotating mandrel, 11 is a guide supporting rod extending radially around the rotating mandrel 10, and 12 is a double-sided guide claw provided at the tip of the guide supporting rod 11 so as to be vertically movable.

Regarding the manufacturing method, a continuous fiber impregnated with a resin (for example, a room-temperature-curable fluid resin) is hooked on the corresponding guide claw 12 while sequentially engaging it in the axial direction and the diagonal direction in a so-called one-stroke writing manner, and intersecting. Be sure to use fiber groups 5a, 5 in Part A
At least three layers b and 5c should be alternately stacked. FIG. 7 shows an example of a method of laminating the intersection A, in which a predetermined number (five in the illustrated example) of fiber groups 5a, 5b, 5c are made into one layer and are passed several times in the order of the numbers with arrows in the figure. It is a case of stacking. Therefore, for example, when the intersection A has 12 layers (60 lines), the steps from to are repeated four times. At this time, it is necessary to give sufficient tension to the continuous fiber so as to maintain the linearity.

Here, of course, the continuous fiber can be supplied by manual work, but a method of automatically executing it by a mechanical means that operates based on a program whose passage order is preset is adopted.

In addition, although the rectangular columnar reinforcing member has been described in the embodiment, the present invention is not limited to this, and the pitch of the intersecting portion may be, for example, one depending on the required reinforcing member reinforcement arrangement. It is needless to say that the shape is arbitrary, such as different parts, those containing other components including the circumferential direction, and all prisms, pyramids, cylinders, cones, and the like. Here, the fiber 5 also includes a twisted cord, a braid, and the like.

"Effects of the Invention" As described above, according to the present invention, a reinforcing member is embedded in a portion that becomes a concrete structure, and the reinforcing member is at least three-dimensionally arranged with an interval between them. Form the corner axes of the book and the intersections between the corner axes through the same intersections on the corner axes in the clockwise and counterclockwise directions in the form of intersecting the corner axes around these corner axes. Spirally wound first and second
And the corner axis and the
Each of the first and second spirals is composed of a fiber bundle composed of a flat fiber group in which a plurality of fibers are arranged in parallel. All the fiber bundles and fiber group bundles of the respective fiber bundles are made of a resin material. And the intersection of the axial muscle and the first and second spiral muscles intersects in three directions, the flat fiber group forming the corner axial muscles and the flat fiber forming each spiral muscle. Since the fiber group has a cross-sectional shape in which at least three layers or more are alternately laminated with each fiber group as a layer, the following excellent effects that have not been obtained conventionally are exhibited.

(A) Since the entire reinforcing member is made of fiber and resin material, it is extremely lightweight and can be preliminarily manufactured as an integrated product, which facilitates workability on site, transportability, and large-scale unitization. be able to.

(B) Since the fibers are in the form of crossing and are solidified with a resin material, the axial reinforcement and the spiral reinforcement wound around it have a stepless shape, and as a result, Since the covering thickness can be made uniform, it can be advantageously used as a reinforcing member such as a pillar or a beam. In addition, since each flat fiber group is not alternately bent at the intersection and is laminated in three or more layers in a straight line without being locally bent, three or more fibers are cross-sectioned in the cross section of the intersection. Since the group members are integrated with each other, both tensile strength and compressive strength at the intersection can be reliably expected, and an integrated structure having sufficient reliability of each fiber can be obtained.

(C) Since the fiber has a structure coated with a resin, the fiber, which is the main strength member, has excellent corrosion resistance and is extremely advantageous as a structural material.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention.
1 is a perspective view of a reinforcing member, FIG. 2 is an enlarged perspective view of a part of the reinforcing member, FIG. 3 is a sectional view of a fiber bundle, and FIG. 4 is a fiber bundle along the line IV-IV in FIG. 5 is a schematic sectional view of each other, FIG. 5 is a front view showing the outline of the manufacturing apparatus, FIG. 6 is a side view thereof,
FIG. 7 is a perspective view shown for explaining the manufacturing process. 1 ... Reinforcing member, 2 ... Shaft, 3,4 ... First and second
Spirals, 5 ... Fiber, 5a, 5b, 5c ... Fiber group, 6 ... Resin material, T ... Fiber bundle, A, C ... Intersection.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Fujisaki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Toshio Hiraga 2342-25 Totsuka, Totsuka-ku, Yokohama 72) Inventor Takashi Nishimoto 3-3-15 Namiki, Sagamihara City, Kanagawa Prefecture (72) Minoru Futagawa 2-24-7 Hashimoto, Sagamihara City, Kanagawa Prefecture (56) References Japanese Patent Publication No. 57-2413 (JP, B2) Special Features Public Sho 53-47608 (JP, B2)

Claims (1)

[Claims] 1. A reinforcing member embedded in a portion to be a concrete structure, wherein the reinforcing member has at least three corner axis bars three-dimensionally arranged at intervals.
These are wound spirally around these corner axes, passing through the same intersection on the corner axes in the right-hand and left-hand directions and forming an intersection between the corner axes. A first and a second spiral, and
The corner axial line and the first and second spiral lines are each composed of a fiber bundle composed of a flat fiber group in which a plurality of fibers are arranged in parallel, and all the fiber bundles of each fiber bundle and The fiber groups are bound by a resin material, and moreover, the intersecting portion where the axial line, the first and second spiral lines intersect in three directions, has a flat fiber group forming the corner axial line and each spiral. A concrete reinforcing member having a cross-sectional shape in which flat fiber groups constituting a streak are laminated by alternately intersecting at least three layers or more with each fiber group as a layer.