CN101560837A - Method for consolidating tilting combination structure - Google Patents

Abstract

The invention discloses a reinforcement method for an inclined composite structure, which mainly includes laying tie steel strips on the surface of a concrete building to be reinforced, and welding a third steel plate at both ends of the tie steel strips to extend to the connected steel concrete members Edge, and then set fixed points with the same structure at the edges of both ends, specifically, after the first and second steel plates are bolted to the steel concrete member, the second steel plate faces the third steel plate, and then between the second and third steel plates Reasonable combination welding between the first and second stiffening steel plates, T-shaped plates and triangular steel plates. This fixing method only needs to use welding bolt technology to fix several steel plates of a certain shape on the building to be fixed and the connected components to form a space multi-directional stress system, which has the advantages of convenient construction, reasonable structure and high strength. It can flexibly deal with the problem of reinforcement of structural components in large-space, long-span and high-rise buildings.

Description

A strengthening method of inclined composite structure

technical field

The invention relates to the reinforcement field of building structures (boards, beams, columns, walls, etc.), in particular to a reinforcement method for inclined composite structures.

Background technique

The existing concrete building reinforcement methods mainly include enlarging section method, outsourcing steel method, prestressing method, adding fulcrum method, pasting carbon fiber material reinforcement method and so on. The above method is reasonable and effective for dealing with beams, columns, or small areas to be reinforced in general buildings and low-span frame structures, but for high-rise buildings and long-span frame composite structural members such as: shear walls, The reinforcement of floors, beams, columns, etc. has disadvantages such as low bearing capacity, inconvenient construction, and great impact on production, life, and headroom. In order to avoid the above-mentioned shortcomings, the steel strip welding method is often used in the existing reinforcement projects to deal with the above-mentioned concrete buildings to be reinforced. Chisel off, so that the internal section steel is exposed, and then start from the exposed section steel at both ends and weld the reinforcing steel belt section by section along the surface of the concrete building to be reinforced. Steel strips form the overall stressed structure. In long-term engineering practice, it is found that when this reinforcement method is used to deal with some high-rise, long-span and other special-shaped buildings to be reinforced, because the joint welds at both ends cannot meet the design requirements, there is a reinforced structural strength. The shortcomings of poor and improper force, and when the steel concrete member and the concrete building to be reinforced are at a certain angle of inclination, it will cause inconvenience to the construction due to the limitation of the operating space. Therefore, it is necessary to find a reinforcement method with reasonable stress, excellent performance and convenient construction when dealing with high-rise buildings and large-span special-shaped frame composite structures.

Contents of the invention

In view of the shortcomings or deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a method for reinforcing inclined composite structures, which can flexibly deal with the problems of concrete buildings to be reinforced in towering, long-span and special-shaped buildings.

In order to realize above-mentioned task, the present invention adopts following technical solution:

A reinforcement method for an inclined composite structure, characterized in that it comprises the following steps:

Step 1: First, lay tie steel strips on the surface of the concrete building to be reinforced according to a conventional method, and weld a third steel plate at both ends of the tie steel strip, and the third steel plate is fixed on the surface of the concrete building to be reinforced by anchor bolts And extend to the edge of one side of the inclined steel concrete member around it;

Step 2: Fix the first steel plate and the second steel plate on both sides of the inclined steel concrete member respectively. The first steel plate and the second steel plate are fixed by a plurality of bolts passing through the inclined steel concrete member, and the bolts are located on the two sides of the inner steel column. side, the second steel plate faces the third steel plate on the concrete building to be strengthened; two first stiffened steel plates are welded in parallel on the second steel plate, and how many pieces are uniformly welded on the outer sides of the two parallel first stiffened steel plates A second stiffened steel plate, the second stiffened steel plate is perpendicular to the first stiffened steel plate and is located between every two bolts;

Step 3, a T-shaped plate is welded between the third steel plate on the surface of the concrete building to be reinforced and the second steel plate on the inclined steel concrete member, the upper end of the T-shaped plate is welded on the second steel plate, and the upper end side The side is welded to the inner side of two parallel first stiffening steel plates, the lower end side is welded to the third steel plate, and a triangular steel plate is welded to the longitudinal center line of the web of the T-shaped plate, and the triangular steel plate is connected to the second steel plate and the concrete building to be reinforced A third steel plate on the surface of the object is also welded together.

Other characteristics of the present invention have:

The bolts used to fix the first and second steel plates are covered with sleeves.

The number of second stiffened steel plates fixed on the outer sides of the two parallel first stiffened steel plates is the same.

The anchor bolts used to fix the third steel plate are chemical anchor bolts.

The included angle between the concrete building to be reinforced and its surrounding inclined steel concrete members is ≤90°.

The structure formed by the method for strengthening the composite structure provided by the invention is composed of two nodes with a multi-directional stress system and a tie steel belt between the two nodes. The structural system has the advantages of reasonable structure and high strength, and because there is no need to shovel the concrete layer at the junction of the steel concrete member and the concrete building to be reinforced before construction, only the welding anchor technology is required, so that the reinforcement method is suitable for dealing with inclined structures. The reinforcement of steel-concrete composite structural members has the advantages of convenient construction and flexible operation. Therefore, it provides a reinforcement method with reasonable structural strength and convenient construction to solve the problem of composite structures to be reinforced in large-space, long-span, and high-rise buildings. As a reinforcement method for a special structure, it broadens the scope of building reinforcement. There are supplements and improvements in reinforcement methods.

Description of drawings

Fig. 1 is a structural schematic diagram of fixed sections with the same structure at both ends of the tie steel strip 11 in one embodiment of the present invention;

Fig. 2 is a sectional view along line A-A in Fig. 1;

Fig. 3 is a sectional view along line B-B in Fig. 1 .

The present invention will be further described in detail below in conjunction with the accompanying drawings.

Detailed ways

The present invention will be described in detail below with reference to the drawings and embodiments of the specification.

Refer to Figure 1, Figure 2 and Figure 3; the reinforcement method of this inclined composite structure is as follows:

In this example, at the beginning, the position of laying tie steel strip 11 is reserved on the surface of the concrete building to be reinforced, and then the third steel plate 3 is fixed on the concrete to be reinforced by twelve chemical anchor bolts 10 at both ends of the reserved position. The surface of the building 14 and extends to the edge of one side of the inclined steel concrete member 13;

Then before the first and second steel plates (1, 2) are fixed, two rectangular first stiffened steel plates 5 and ten square second stiffened steel plates 7 are welded on the second steel plate 2, wherein the rectangular first stiffened steel plates 5 are parallel And be welded on the both sides of the second steel plate 2 along its one long side, 10 square second stiffened steel plates 7 are evenly welded on two parallel first stiffened steel plates 5 outer sides, and the second stiffened steel plate 7 and the first stiffened steel plate A stiffened steel plate 5 is perpendicular to each other; after welding, the first steel plate 1 and the second steel plate 2 welded with the first and second stiffened steel plates (5, 7) pass through the steel concrete member 13 and are located symmetrically on both sides of the inner steel column 12 The bolts 9 are fixed on both sides of the steel concrete member 13, and there are protective sleeves 8 on the bolts 9, and the bolts 9 and the second stiffening steel plate 7 are distributed at intervals, and the second steel plate 2 faces the concrete building 14 to be reinforced. The third steel plate 3 on the top, and the lower end side is welded to the third steel plate 3;

Continue to weld the T-shaped plate 6 upper end between the second and third steel plates (2, 3) and the two sides of the upper end with the second steel plate 2 and the inner side of the rectangular first stiffening steel plate 5 respectively, and weld the lower end with the third steel plate 3 A triangular steel plate 4 is welded at the longitudinal centerline of the web of the T-shaped plate 6, and the other side and the lower side of the triangular steel plate 4 are welded to the second steel plate 2 and the third steel plate 3 respectively;

After the fixed spot welding bolts at both ends of the tie steel strip 11 are completed according to the above-mentioned specific operation method, the tie tie steel strip 11 is welded section by section from the outer side of the third steel plate 3 at both ends.

The following is a description of the principle of a method for strengthening an inclined composite structure of the present invention.

In the present invention, the fixed joints at both ends are to fix the first steel plate and the second steel plate welded with the stiffened steel plate to the upper and lower sides of the steel concrete member through the screw rod and the nuts at both ends respectively to form a basic stress system; the middle of the joint The combined welding structure between the triangular steel plate, T-shaped steel plate, the second and third steel plates and the stiffened steel plate constitutes a longitudinal tie system; the third steel plate is fixed on the concrete building to be reinforced by anchor bolts, and its two ends Welded with the second steel plate and tie steel strip respectively, the anchor bolt mainly bears the longitudinal shear force, the third steel plate bears the longitudinal tension force, and the space bending moment, shear force and axial force generated by the tension force are jointly borne by the rest . Due to the multi-directional stress system formed by the above structure, the overall bearing capacity of the reinforced structure is strengthened, and the structural strength is reasonable, and because there is no need to shovel the concrete layer at the connection between the steel concrete member and the concrete building to be reinforced before construction, Only the welding anchor technology is needed, and the construction personnel can operate in enough space, so that the reinforcement method has the characteristics of convenient construction and strong operability when dealing with the reinforcement of steel-concrete composite structural members.

The present invention has been specifically described above by way of examples, but the present invention is not limited to the above specific examples.

Claims (5)

1. A reinforcement method for an inclined composite structure, comprising the following steps: Step 1, at first on the surface of the concrete building (14) to be reinforced, the tie steel strip (11) is laid according to the conventional method, and the third steel plate (3) is welded at the two ends of the tie steel strip (11), the third The steel plate (3) is fixed on the surface of the concrete building (14) to be reinforced by the anchor bolt (10) and extends to the edge of one side of the inclined steel concrete member (13) around it; Step 2, fix the first steel plate (1) and the second steel plate (2) on both sides of the inclined steel concrete member (13), respectively, the first steel plate (1) and the second steel plate (2) pass through the inclined steel concrete A plurality of bolts (9) of the component (13) are fixed, and the bolts (9) are located on both sides of the inner steel column (12), and the second steel plate (2) faces the third steel plate on the concrete building (14) to be reinforced (3); On the second steel plate (2), two first stiffened steel plates (5) are welded in parallel, and a plurality of second stiffened steel plates are uniformly welded on the outer side of the two parallel first stiffened steel plates (5) (7), the second stiffened steel plate (7) is perpendicular to the first stiffened steel plate (5), and is located between every two bolts (9); Step 3, a T-shaped plate (6) is welded between the third steel plate (3) on the surface of the concrete building (14) to be reinforced and the second steel plate (2) on the inclined steel concrete member (13) The upper end of the T-shaped plate (6) is welded to the second steel plate (2), the upper end side is welded to the inner side of two parallel first stiffened steel plates (5), and the lower end side is welded to the third steel plate (3), T-shaped plate (6) web longitudinal center line position is welded with triangular steel plate (4), this triangular steel plate (4) and the 3rd steel plate ( 3) Also welded together. 2. The method according to claim 1, characterized in that said bolts (9) are sleeved with sleeves (8). 3. The method according to claim 1, characterized in that the number of second stiffening steel plates (7) fixed outside the two parallel first stiffening steel plates (5) is the same. 4. The method according to claim 1, characterized in that, the anchor (10) is a chemical anchor. 5. The method according to claim 1, characterized in that the included angle between the concrete building (14) to be reinforced and its surrounding inclined steel concrete members (13) is ≤90°.

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