JP2692751B2 - Reinforced structure of building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a reinforced concrete structure, a block structure, a pillar structure such as a brick structure, a wall, a floor, and a reinforcing structure for earthquake-proof reinforcing other existing buildings.

<< Prior Art >> A reinforcing structure of this type is, for example, as shown in FIG.

Post-installed anchor 2 on existing reinforced concrete wall 1
Then, the iron plate 3 was bolted to the surface of the wall 1 with the anchors 2 with a gap of about 5 mm or more provided between the surface of the wall 1 and the iron plate 3 and non-shrink mortar 4 was filled.

In this way, deterioration of strength and rigidity due to repeated deformation when an earthquake input is received was prevented.

That is, the iron plate 3 can ensure the stability and tenacity of the restoring force of the concrete wall 1.

There is also a reinforcing structure in which the outer periphery of a reinforced concrete column is constrained by an iron plate, which is based on the known fact that effective constraining of core concrete increases shear resistance.

<< Problems to be solved by the invention >> However, slippage between the iron plate and the filled mortar,
The iron plate displacement phenomenon was prevented by increasing the number of post-installed anchors.

Further, the buckling yield of an iron plate loses the bending strength of the iron plate itself, so that the reinforcing effect is lost and the reinforcing structure is rendered ineffective. As a result, the number of man-hours increased, such as the ribs being welded to the surface of the iron plate.

In other words, adding ribs impairs the external appearance, and the role of the filling mortar is low in the transmission of mechanical force, and bending stress is transmitted from the reinforced body to the iron plate through the post-installed anchor.

This is because the filling mortar for integrating the iron plate and the body to be reinforced is slipped and released on the surface of the iron plate.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a reinforcing structure for a building in which an iron plate and a reinforced frame (existing structure) are integrated and the construction is simple.

<< Means for Solving the Problem >> In order to achieve the above object, the reinforcing structure of the building of the present invention is a reinforced concrete structure, a block structure, a brick structure, etc. A striped steel plate was provided on the surface of the reinforced frame fixed to the anchor, and mortar was densely filled between the striped steel plate and the reinforced frame.

Further, in order to effectively counter the alternating repeated deformation input such as earthquake input, when the striped steel plates are plural in one plane, the stripe directions of the striped steel plates are orthogonal to the stripe directions of the adjacent striped steel plates. It was placed in.

<< Operation >> With the above configuration, the irregularities of the striped steel plate are buried in the mortar, and the behavior of the reinforced frame is directly propagated to the striped steel plate.

This makes it possible to reduce the diameter of post-installed anchors or the number of driven anchors, which is particularly effective for reinforcing a thin reinforced frame.

In addition, the striped steel plate and the reinforced frame are integrated to give stable tenacity and resilience characteristics to alternating repeated deformation due to seismic force, and the unevenness of the striped steel plate itself makes it difficult for the steel plate to buckle. It can be practically used even if the plate thickness is thin.

Further, since the striped steel plate is provided on the surface of the reinforced frame by fixing it to the anchor of the main structure that is driven into the reinforced frame, even if peeling occurs between the mortar and the striped steel plate. , The behavior such as the deformation occurring in the reinforced frame can be continuously transmitted from the main anchor to the striped steel plate, and the link between the main anchor that is driven into the reinforced frame and the striped steel plate fixed to the anchor Thereby, even if the striped steel plate is peeled from the mortar, the reinforced frame can be sufficiently reinforced.

In particular, when the arrangement directions of the striped steel plates are selected so as to be staggered with the directions of the adjacent stripes, the striped steel sheets efficiently and effectively resist various deformation directions associated with the seismic force.

<< Embodiment >> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 shows that the surface of reinforced concrete wall 1a is roughened, post-installed anchor 2a is driven into this, and the striped steel plate 5 with pre-drilled through holes for post-installed anchor 2a is supported by the anchor 2a. 1a Attached to the surface.

The striped steel plate 5 is about 6 mm thick, and the height of the unevenness is 2 mm to 10 mm.
It is. Post-installed anchor 2a has a diameter of 13 mm and a head diameter of 12 M
Screw with nut.

The striped steel plate 5 is temporarily fixed to the post-installed anchor 2a with the nut 6 so that the gap between the front surface of the wall 1a and the back surface of the striped steel plate 5 is 30 mm.

Next, the mortar grout 7 is injected and filled into the void portion.

The grout 7 is required to have high strength and high fluidity so that no cavities are formed around the uneven portion of the striped steel plate 5. In order for the behavior of the wall 1a to be transmitted to the striped steel plate 5 through the mortar grout 7, it is necessary that the uneven outer peripheral surface of the striped steel plate 5 and the grout 7 be firmly and integrally attached. Carefully study and manage the mixing ratio of the agent and the leavening agent.

After that, the nut 6 is retightened, and after the aging period of the grout 7 has passed, the process is finished.

If the body to be reinforced is a brick wall or the like, no work of roughening is required.

FIG. 2 shows a case where a large number of striped steel plates 5 are arranged and fixed on one plane of the reinforced body. The stripes are arranged side by side in the horizontal direction like steel plates 5a, 5b, 5c in the order of vertical-horizontal-vertical. However, in the lower stage thereof, they are arranged side by side in the order of horizontal-longitudinal-horizontal, and the stripes of the striped steel plate 5a are oriented in the direction orthogonal to the adjacent striped steel plates.

That is, in this embodiment, striped steel plates oriented in the vertical and horizontal directions are staggered on the reinforced frame 8.

<Effect> As described in detail above, according to the reinforcing structure for a building of the present invention, a permanent anchor is provided by driving into the reinforced body, and the anchor is fixed to this anchor to form a striped steel plate on the surface of the reinforced body. Since the mortar is densely filled between the striped steel plate and the reinforced frame to be stiffened, the irregularities of the striped steel plate and the mortar are in three-dimensional contact, and the behavior of the reinforced frame is the striped steel plate together with the mortar filled. It propagates directly as a unit and not only through post-installed anchors.

Therefore, a small number of post-installed anchors is sufficient, the number of drilling holes in the steel plate is also small, and the number of steps in terms of construction is small.

This means that when the flat steel plate is used, the ribs are welded and formed, but the striped steel plate itself is less likely to buckle, so that rib welding is not necessary or has the same effect in that the number can be reduced.

Furthermore, since the striped steel plate is provided on the surface of the reinforced skeleton by fixing it to the anchor of the main structure that is driven into the reinforced skeleton, even if peeling occurs between the mortar and the striped steel plate, Behaviors such as deformations that occur in the reinforced structure can be continuously transmitted from the main anchors to the striped steel plate, and by the cooperation between the main anchors hammered into the reinforced frame and the striped steel plate fixed to the anchors. Even after the striped steel plate is peeled from the mortar, it is possible to maintain a sufficient reinforcing effect on the reinforced frame.

In addition, by arranging the stripes of striped steel sheets so that the directions of the stripes of the striped steel sheets are orthogonal to the directions of the adjacent striped steel sheets, the striped steel sheets cooperatively oppose the alternating repeated deformation force during an earthquake input, and It has the effect of not losing the adhesive force.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a front view showing another embodiment, and FIG. 3 is a sectional view showing a conventional example. 1 ... Reinforced concrete wall 2 ... Post-installed anchor 3 ... Iron plate 4 ... Mortar, 5 ... Striped steel plate 6 ... Nut 7 ... Mortar grout, 8 ... Reinforced frame

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sadao Sugimura 1-6-5 Marunouchi, Chiyoda-ku, Tokyo Inside East Japan Railway Company (72) Inventor Tsuneo Hasuda 2-8, Hikarimachi, Kokubunji, Tokyo 38 Property Japan Railway Technical Research Institute (72) Inventor Hideo Katsumata 4-640 Shimoseido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute Co., Ltd. (56) Reference JP 59-8813 (JP, A) JP 52 -37295 (JP, B2) Actual Kohei 1-111708 (JP, Y2)

Claims (2)

(57) [Claims] 1. A permanent anchor is provided by driving into a reinforced structure such as a reinforced concrete structure, a block structure, or a brick structure,
A reinforcing structure for a building, characterized in that a striped steel plate is provided on the surface of the reinforced frame fixed to the anchor, and mortar is densely filled between the striped steel plate and the reinforced frame. 2. When the striped steel plates are plural in one plane, the striped steel plates are arranged so that the stripe directions of the striped steel plates are orthogonal to the stripe directions of the adjacent striped steel plates. Building reinforcement structure.