KR101379891B1

KR101379891B1 - Filled type enlargement construction structure method

Info

Publication number: KR101379891B1
Application number: KR1020130104863A
Authority: KR
Inventors: 황대성
Original assignee: 비코비엔주식회사
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2014-04-01

Abstract

The present invention relates to a reinforcing structure which performs reinforcement by enlarging the section of a concrete structure and, more particularly, to a filling type section enlargement reinforcing structure, which performs reinforcement by installing a base plate and an open section steel on the surface of a concrete structure to be reinforced to form a closed section and filling a filling material in the closed section to enlarge the section in a CFT structure, and a preferred method of constructing the reinforcing structure. The filling type section enlargement reinforcing structure according to the present invention is characterized by comprising: a base plate installed and fixed to the surface of a concrete structure by an anchor; an anchorage having one end embedded in the concrete structure and the other end protruding from the surface of the concrete structure; an open section steel made from a steel frame member having a U-shaped, C-shaped, or H-shaped open section and installed and bonded to the surface of the base plate while receiving the other end of the anchorage in the open section to form a closed section with the base plate; and a filling material filled in the closed section formed by the base plate and the open section steel.

Description

Filled Type Enlargement Construction Structure Method

The present invention relates to a reinforcement structure by reinforcing the cross section of the concrete structure, and more specifically, by installing a base plate and open section steel on the surface of the concrete structure to be reinforced to form a closed cross section and then filling the filler therein. The present invention relates to a filling cross-section reinforcement structure for reinforcing and reinforcing a section by a CFT structure and a preferable construction method thereof.

The structure is designed to be seismic resistant to horizontal loads acting horizontally, such as wind loads and earthquake loads. Especially in recent years, earthquakes frequently occur in Korea, and seismic design is strengthened in public buildings such as school buildings.

There is a seismic or damping structure as an effective method of structural seismic design. Damping is a concept to control the structure by reducing the vibration of the structure by applying the control force corresponding to the vibration of the structure to the outside or inside of the structure or changing the stiffness or damping of the structure instantaneously according to the characteristics of the input vibration. The vibration suppression structure is usually implemented by a vibration suppression device that dissipates the vibration energy introduced into the structure, that is, a damper.

By the way, in the case of limited express school buildings, the allowable inter-floor displacement is 1.0% (1.0% of the height) in the case of limited express according to the current national standard (KBC 2009). However, it is difficult to expect effective damping effect of various dampers in low and medium-rise buildings with small displacements. Therefore, in general, sectional expansion reinforcement is applied to the middle and low-rise buildings.

1 is a cross-sectional view of a conventional general cross-sectional reinforcement structure. As shown in the related art, the process of installing high-strength mortar by installing the anchor to protrude from the concrete structure, installing the protruding protrusion to protrude from the steel frame, connecting the anchor and the protruding protrusion, and installing the formwork between the concrete structure and the steel frame. The section expansion reinforcement structure was completed. 2 is a cross-sectional view of the cross-sectional extension reinforcement structure according to Patent No. 10-1168876. 2 is to complete the cross-sectional expansion portion of the SRC structure, the formwork must still go through the installation process.

The present invention was developed to improve the workability deterioration problem according to the formwork installation of the conventional section expansion reinforcement structure is constructed of SRC structure, by completing the CFT structure of the cross-section extension part can be expected to improve the workability according to the omission of the formwork process There is a technical problem in providing a filling cross-section reinforcement structure and its preferred construction method.

In order to solve the above technical problem, the present invention provides a cross-sectional extension reinforcement structure for reinforcing the cross section of the concrete structure, the base plate is fixed to the anchor surface of the concrete structure; One end is embedded in the concrete structure while the other end fixing fixture is installed to protrude from the surface of the concrete structure; C-type, C-type or H-type cross-section is provided with a steel member having the inside of the open end, the open end is formed by joining to the base plate surface while receiving the other end of the fixing steel to form the base plate and the closed end River; It provides a filling cross-sectional reinforcement structure characterized in that it comprises a; and the filler is filled in the closed end surface by the base plate and the open section steel.

In another aspect, the present invention provides a method for constructing a filling cross-section reinforcement structure, the first step of drilling the anchor insertion hole and the fixing steel insertion hole on the surface of the concrete structure to be reinforced; A second step of fixing the base plate to the concrete structure surface while fixing the anchor plate through the base plate and inserting and fixing the anchor plate into the anchor insertion hole, and fixing and fixing the base plate to protrude from the surface of the concrete structure while inserting the fixing hardware into the fixing steel insertion hole; A third step of forming a closed cross section by joining and installing an open cross section steel on the surface of the base plate while accommodating the protruding fixing hardware therein; It provides a method for reinforcing cross-sectional extension reinforcement characterized in that it comprises a; the fourth step of filling the filler in the closed end surface by the base plate and the open end steel.

According to the present invention, the following effects can be expected.

First, it is possible to simply complete the section extension part with the CFT structure using the open section steel. Since the CFT structure is structurally stable, such as rigidity, strength, and deformation, and becomes a structure having excellent advantages in fire resistance, construction, etc., the cross-sectional extension portion completed in accordance with the present invention is advantageous not only in structural reinforcing effect but also in fire resistance and construction resistance. In particular, the formwork step can be omitted, and the workability can be improved.

Secondly, it has excellent reinforcing effect because it strengthens the integrity of the concrete structure and the section extension part by fixing fixtures and protrusions.

Third, when reinforcing the opening of the concrete structure can be applied to the concrete structure side as well as the front of the concrete structure, it can be appropriately applied according to the situation.

1 is a cross-sectional view of a conventional general cross-sectional reinforcement structure.
2 is a cross-sectional view of the cross-sectional reinforcement structure according to Patent No. 10-1168876.
3 is a front view of an embodiment to which the cross-sectional reinforcement structure is applied according to the present invention.
4 and 5 are a cross-sectional view taken along AA and BB in FIG.
Figure 6 is a combined detail view of the base plate and the open section steel in the cross-sectional reinforcement structure according to the present invention.
7 is a construction sequence diagram of the cross-sectional extension reinforcement method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings and preferred embodiments.

3 is a front view of an embodiment to which the cross-sectional reinforcement structure is applied according to the present invention. As can be seen, the present invention reinforces the method by expanding the cross section of the concrete structure 10. It is to form a cross-sectional extension portion 100 on the surface of the concrete structure (10). 3 is an example of reinforcing the opening of the concrete structure 10, Figure 3 (a) is an example of reinforcement by extending the cross section to the front of the concrete structure 10, Figure 3 (b) is a concrete structure 10 This is an example of reinforcing the section by extending the section toward the opening. Of course, the present invention can also be applied to reinforcement through cross-sectional expansion of columns, beams, etc. in a building.

4 and 5 are a cross-sectional view taken along line A-A and B-B in FIG. 3, showing a rechargeable cross-sectional reinforcement structure according to the present invention. Filled cross-sectional reinforcement structure according to the invention, the base plate 110 is fixed to the anchor 111 on the surface of the concrete structure 10; A fixing iron 120 having one end embedded in the concrete structure 10 and the other end installed to protrude from the surface of the concrete structure 10; The c-type, C-type or H-type cross section is provided with a steel member having the inside of the open end surface, the base plate 110 is joined to the surface of the base plate 110 while receiving the other end of the fixing hardware 120 inside the open end surface; Open section steel 130 to form a closed cross-section); The base plate 110 and the filler 140 is filled in the closed end surface by the open section steel 130; is configured to include. The base plate 110 and the open section steel 130 to form a rectangular closed cross-section and filling the filler 140 therein to complete the enlarged portion of a kind of CFT structure. Since the open-sided steel 130 serves as a formwork, there is no need for a separate formwork installation work, thereby improving workability.

The base plate 110 becomes a base surface for installing (welding) the joint of the open end steel 130, and is fixed to the surface of the concrete structure 10 by the anchor 111. Preferably, the chemical anchor 111 is fixed to the surface of the concrete structure 10 and treated by filling the fillers 112, non-shrink mortar, high-performance fillers, etc. in the gaps therebetween. Protruding protrusions 150 may protrude from the surface of the base plate 110, and the protruding protrusions 150 may be embedded in the filling material 140 to reinforce the integrity of the concrete structure 10 and the cross-sectional extension portion 100. It plays a role. The protruding protrusion 150 may have any shape as long as it does not interfere with the filling of the filler 140. For example, the protrusion protrusion 150 may include vertical ribs, horizontal ribs, and stud bolts. In FIG. 3, a perforated plate on which perforated holes 151 is formed is illustrated as an example of a horizontal rib. Since the perforated hole 151 serves as a shear key because the filler 140 passes through and is filled, the perforated plate becomes an advantageous shape as the protruding protrusion 150.

The fixing hardware 120 is embedded in one end of the concrete structure 10 and the other end is embedded in the filler 140, thereby strengthening the integrity of the concrete structure 10 and the cross-sectional extension portion 100. Fixing hardware 120 is suitable if the other end is bent hook rebar treated with a hook 121, at this time, the hook 121 of the hook reinforcement can be fixed to the vertical reinforcement 170. Vertical reinforcement 170 contributes to the strength of the cross-sectional extension portion 100.

Opening section steel 130 is provided with a steel member having a c-, C- or H-shaped cross-section inside the open side, thereby joining the base plate 110 to form a closed cross-section with the base plate 110 do. Open section steel 130, as well as c-shaped steel, C-shaped steel, H-shaped steel produced integrally through hot rolling, as well as assembled steel fabricated in a built-up type is possible. 4 or below shows an embodiment in which the open section steel 130 by the C-shaped steel is welded to the base plate 110. The joint reinforcement 160 may be bonded to the open cross-section steel 130 so as to connect both flanges. The connection reinforcement 160 is buried in the filler 140 while suppressing the buckling of the open cross-section steel 130. It serves to strengthen the integrity of the steel 130 and the filler 140. However, the connection reinforcing material 160 should be provided so as not to interfere with the filling of the filler 140, for example, as a perforated plate formed with a perforation hole 161 as shown in FIG. Although not shown, the protruding protrusion may be provided in the open section steel 130 similarly to the base plate 110, and is also sealed when the open section steel 130 is installed (for example, in FIG. 3 (a) (b)). In the case of reinforcement), an inlet for injecting filler 140 and an outlet for air discharge may be formed in the open end steel 130.

Filler 140 is filled and restrained inside the closed cross-section by the base plate 110 and the open section steel 130, whereby the cross-sectional extension portion 100 is completed in a CFT structure. The filler 140 is preferably concrete, but of course, other materials may be employed.

6 is a detailed view of the coupling of the base plate 110 and the open section steel 130 in the cross-sectional reinforcement structure according to the present invention. In particular, in Figure 6 a pair of strip plates 110a arranged in parallel; The base plate 110 of the ladder structure consisting of; connecting plate (110b) for connecting between the pair of strip plate (110a) can be confirmed, such a base plate 110 is advantageous to the material saving than the flat plate. As can be seen, the base plate 110 of the ladder structure may be fixed to the concrete structure 10 while penetrating through the connecting plate 110b with the anchor 111, and the cross section steel 130 on the pair of strip plates 110b. The two flanges of) may be joined.

7 is a construction sequence diagram of the cross-sectional extension reinforcement method according to the present invention. First, the coating material or foreign matter on the surface of the concrete structure 10 to be reinforced is removed by using a grinder or a planer, and then the anchor insertion hole 11 and the fixing steel insertion hole 12 are drilled on the surface of the concrete structure 10 with a drill ( Step 1).

Then, while fixing the base plate 110 to the surface of the concrete structure 10 while fixing the anchor 111 through the base plate 110 and inserted into the anchor insertion hole 11, while fixing the fixing steel 120 Inserted into the insertion hole 12 is fixed to protrude from the surface of the concrete structure 10 (second step). At this time, the base plate 110 to install the anchor 111 while adjusting the horizontal or vertical level, the filler 112 in the anchor insertion hole 11 and the inner surface of the base plate 110 and the fixing hardware insertion hole 12 Filling is desirable for precision construction. If the base plate 110 of the ladder structure as shown in FIG. 6 is used, the fixing hardware 120 may be disposed between the connecting plates 110b without penetrating the base plate 110. If it further comprises a protrusion 150 to the vertical reinforcing bar 170 may be installed in the second step.

Next, while receiving the fixing fixture 120 protruding therein, a closed cross section is formed by bonding the open cross section steel 130 to the surface of the base plate 110 (step 3). If the connection reinforcement 160 is further included, the open section steel 130 is prepared and installed in a state in which the connection reinforcement 160 is bonded. Finally, the filler 140 is filled in the closed end surface by the base plate 110 and the open end steel 130 (fourth step). This completes the cross-sectional extension portion 100 of the CFT structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, the present invention is not limited to the above-described exemplary embodiments, and various modifications, additions and substitutions may be made without departing from the scope of the present invention. And the scope of the present invention is defined by the appended claims.

10: concrete structure
11: anchor insertion hole
12: Fixing steel insertion hole
100: section extension part
110; Base plate
111: anchor
112: filler
120: fixing hardware
121: hook
130: open section steel
140: filling material
150: protrusion
160: connection reinforcement
151, 161: perforated holes
170: vertical rebar

Claims

As a cross-sectional extension reinforcement structure to expand and reinforce the cross section of the concrete structure (10),
A base plate 110 fixed to the surface of the concrete structure 10 by an anchor 111;
A fixing iron 120 having one end embedded in the concrete structure 10 and the other end installed to protrude from the surface of the concrete structure 10;
C-type, C-type or H-shaped cross-section is provided with a steel member having the inside of the open end, the base plate 110 is bonded to the surface of the base plate 110 while receiving the other end of the fixing hardware 120 in the open end surface Open section steel 130 to form a closed cross-section with 110;
The base plate 110 and the filler 140 is filled in the closed end surface by the open section steel 130;
The base plate 110 includes a pair of strip plates 110a arranged in parallel; It is provided with a ladder structure consisting of, a fixed structure is installed in the concrete structure 10 as the anchor 111 is installed through the connecting plate (110b) connected between the pair of strip plate (110a),
The fixing hardware 120 is installed to protrude between the connecting plate 110b of the base plate,
The open end face steel 130, the filling section expansion reinforcement structure, characterized in that both flanges are installed by welding the pair of strip plate (110a).

In claim 1,
A protruding protrusion 150 provided to protrude on the surface of the base plate 110 or the inner side surface steel 130 and embedded in the filler 140;
Connection reinforcing member 160 is installed to connect both flanges of the open section steel 130 is embedded in the filler 140;
Charged section expansion reinforcement structure, characterized in that it comprises one or more of more.

3. The method of claim 2,
The protrusion protrusion 150 or the connecting reinforcement 160, the filling section enlargement reinforcement structure characterized in that it is provided with a perforated plate formed with perforation holes (151, 161).

4. The method according to any one of claims 1 to 3,
The fixing hardware 120, the other end is bent to the reinforced reinforcement structure, characterized in that the hook is provided with a hook reinforcement treated with a hook 121.

5. The method of claim 4,
Vertical reinforcement 170 is fixed to the hook 121 of the hook reinforcing bar;
Charged section expansion reinforcement structure, characterized in that further comprises a.

delete

As a method of constructing a filling cross-section reinforcement structure according to claim 1,
A first step of drilling the anchor insertion hole 11 and the fixing hardware insertion hole 12 in the surface of the concrete structure 10 to be reinforced;
While fixing the base plate 110 to the surface of the concrete structure 10 while inserting and fixing the anchor 111 through the base plate 110 to the anchor insertion hole 11, the fixing hardware 120 is inserted into the fixing steel 120. A second step of fixing to protrude from the surface of the concrete structure 10 while being inserted into the hole 12;
A third step of forming a closed cross-section by bonding the open cross-section steel 130 to the surface of the base plate 110 while accommodating the protruding fixing hardware 120 therein;
A fourth step of filling the filler 140 in the closed end surface by the base plate 110 and the open end steel 130;
Filled section expansion reinforcement method characterized in that it comprises a.

8. The method of claim 7,
The second step, the filling section expansion reinforcement method characterized in that the filler is inserted into the hole 11, the inner surface of the base plate 110 and the fixing iron insertion hole 12 while filling the filler (112).