High-ductility retrofitting structure for reinforced concrete components and construction method thereof

Abstract

This invention relates to a high-toughness reinforcement structure for reinforced concrete members and its construction method. The construction method involves reinforcing an existing structure by attaching a reinforcing layer to it. The steps of the reinforcement method include: (A) partially removing the existing structure; (B) roughening the removed existing structure to form a rough surface; (C) drilling a plurality of holes in the existing structure and inserting a plurality of reinforcing bars into the holes; (D) binding a plurality of first reinforcing bars and a plurality of second reinforcing bars to the existing structure; (E) setting a plurality of templates on the outer side of the existing structure to form a casting space; (F) moistening the roughened surface; and (G) pouring reinforcing material into the casting space, covering the reinforcing bars, the first reinforcing bars, and the second reinforcing bars to form a reinforcing layer that is bonded to the existing structure.

Claims

1. A high-toughness reinforcement method for reinforced concrete members, which involves attaching a reinforcement layer to an existing structure for reinforcement, the steps of which include: (A) Partially remove the existing structure; (B) Roughen the removed existing structure to form a rough surface; (C) Drill multiple holes in the existing structure and insert multiple reinforcing bars into the holes; (D) Tie multiple first reinforcing bars and multiple second reinforcing bars to the existing structure; (E) Set multiple templates on the outer side of the existing structure to form a casting space; (F) Moisten the roughened surface; and (G) Pour a reinforcing material into the casting space to cover the reinforcing bars, the first reinforcing bars and the second reinforcing bars, forming the reinforcing layer and joining it to the existing structure, wherein a groove space is provided between the reinforcing layer and the existing structure so that the reinforcing layer does not contact the adjacent column or wall components.

2. The high-toughness reinforcement method for reinforced concrete members as described in claim 1, wherein the existing structure includes an existing beam member and an existing floor slab member connected thereto, and in step (A), the existing beam member, the existing floor slab member, or a combination thereof are partially removed.

3. The high-toughness reinforcement method for reinforced concrete members as described in claim 1, further includes, in step (G) curing the reinforcement material and further includes the step of removing the formwork.

4. The high-toughness reinforcement method for reinforced concrete members as described in claim 1, wherein, The first reinforcing bar is tied to the anchor bar along a first direction, and the second reinforcing bar is tied to the existing structure in a second direction. The first reinforcing bar and the second reinforcing bar are tied to each other.

5. In the high-toughness reinforcement method for reinforced concrete members as described in claim 1, in step (E), the plurality of formwork includes at least one bottom formwork and at least one side formwork to define the shape of the casting space.

6. In the high-toughness reinforcement method for reinforced concrete members as described in claim 1, in step (G), the reinforcement material is concrete, mortar, resin, or any combination thereof.

7. A high-toughness reinforcement structure for reinforced concrete members, applied to an existing structure for reinforcement, the high-toughness reinforcement structure for reinforced concrete members comprising: A reinforcing layer is attached to the outer surface of the existing structure, wherein the reinforcing layer comprises: a reinforcing material cast within the reinforcing layer; a plurality of first reinforcing bars disposed in the reinforcing material and extending along a first direction; a plurality of second reinforcing bars disposed in the reinforcing material and extending along a second direction, wherein the first direction and the second direction are perpendicular to each other; and a plurality of anchor bars fixed to the existing structure and partially extending into the reinforcing material, thereby connecting the reinforcing layer to the existing structure; wherein a recessed space is provided between the reinforcing layer and adjacent column or wall members of the existing structure to prevent the reinforcing layer from contacting the adjacent column or wall members.

8. The high-toughness reinforcement structure for reinforced concrete members as described in claim 7, wherein the reinforcement material is ordinary concrete, fiber-reinforced concrete, mortar, resin, ultra-high performance concrete (UHPC) or any combination thereof.

9. The high-toughness reinforcement structure for reinforced concrete members as described in claim 7, wherein the first reinforcing bar is tied to the anchor bar along the first direction, and the second reinforcing bar is tied to a portion of the existing structure along the second direction, wherein the first reinforcing bar and the second reinforcing bar are tied together.

10. The high-toughness reinforcement structure for reinforced concrete members as described in claim 7, wherein the first steel bar is a main steel bar and the second steel bar is a stirrup.

11. The high-toughness reinforcement structure for reinforced concrete members as described in claim 7, wherein the first reinforcing bar, the second reinforcing bar, and the anchoring system are respectively metal reinforcing bars, bolts, composite fiber reinforcing bars, or any combination thereof.

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