A steel beam strengthening structure and construction method without unloading

Abstract

The present invention relates to a steel beam reinforcement structure without unloading, including a steel beam to be reinforced, an auxiliary truss upper chord, an auxiliary truss diagonal web member, an auxiliary truss vertical web member, and a connecting plate; the auxiliary truss diagonal web member and the auxiliary truss vertical web member are welded to the lower flange plate of the auxiliary truss upper chord through the connecting plate, that is, the connecting plate is welded to the lower part of the lower flange plate of the auxiliary truss upper chord, and the auxiliary truss diagonal web member and the auxiliary truss vertical web member are respectively welded to the connecting plate; the auxiliary truss diagonal web member and the auxiliary truss vertical web member are welded to the upper flange plate of the steel beam to be reinforced through the connecting plate. The beneficial effect of the present invention is that by setting an auxiliary truss above the steel beam to be reinforced, during the process of demolishing, reconstructing and reinforcing the diagonal braces arranged below the steel beam to be reinforced, it is not necessary to stop the system operation to demolish the equipment and systems supported by the steel beam to be reinforced, etc. It is a technology that can be widely applied to the reinforcement of steel beams.

Description

Technical Field

[0001] The present invention relates to the field of steel structure reinforcement, and particularly to a reinforcement structure and construction method for steel beams that do not require load removal. Background Art

[0002] Steel structure projects usually have the characteristics of large height and self-weight. For industrial factories, which are subject to the dynamic loads of mechanical equipment for a long time, fatigue failure may also occur in the structure. Therefore, for steel structure projects that have been used for many years, or for projects newly built or rebuilt on the basis of existing structures, reinforcement is particularly important.

[0003] At present, the steel structure reinforcement methods are mainly divided into three categories. One is the reinforcement that changes the structural calculation diagram, the second is the reinforcement that changes the cross-section of components, and the third is the reinforcement of connections. Currently, for the reinforcement technology of component cross-sections, it is limited to removing the loads borne by the components to be reinforced before strengthening the component cross-sections. Often, after the system runs for the reinforcement and transformation of a component, the loads of the equipment and systems supported by this component need to be removed, resulting in problems such as long unloading construction time and high cost. Therefore, in order to reduce the impact of component transformation on the original equipment and systems, it is necessary to develop a steel beam reinforcement construction method that does not require the removal of system equipment, is convenient for construction, has little impact on the original system, and is more economical. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a steel beam reinforcement structure and construction method that do not require load removal, are convenient for construction, and have little impact on the original system.

[0005] This steel beam reinforcement structure that does not require load removal includes the steel beam to be reinforced, the upper chord of the auxiliary truss, the diagonal web members of the auxiliary truss, the vertical web members of the auxiliary truss, and the connecting plate; the diagonal web members of the auxiliary truss and the vertical web members of the auxiliary truss are welded to the lower flange plate of the upper chord of the auxiliary truss through the connecting plate, that is, the connecting plate is welded to the lower part of the lower flange plate of the upper chord of the auxiliary truss, and the diagonal web members of the auxiliary truss and the vertical web members of the auxiliary truss are respectively welded to the connecting plate; the diagonal web members of the auxiliary truss and the vertical web members of the auxiliary truss are welded to the upper flange plate of the steel beam to be reinforced through the connecting plate, that is, the connecting plate is welded to the upper part of the upper flange plate of the steel beam to be reinforced, and the diagonal web members of the auxiliary truss and the vertical web members of the auxiliary truss are respectively welded to the connecting plate; the diagonal web members of the auxiliary truss are welded to the existing steel structure column through the connecting plate, that is, the connecting plate is welded at the intersection of the existing steel structure column and the steel beam to be reinforced, and the diagonal web members of the auxiliary truss are welded to the connecting plate; the upper chord of the auxiliary truss is welded to the existing steel structure column; a new support is arranged below the steel beam to be reinforced; there are equipment load support point components on the steel beam to be reinforced, and the arrangements of the diagonal web members of the auxiliary truss and the vertical web members of the auxiliary truss are staggered from the equipment load support point components.

[0006] Preferably, the diagonal web members and vertical web members of the auxiliary truss are made of double angle steels, circular steel pipes or square steel pipes.

[0007] Preferably, the newly-built support is composed of diagonal rods and vertical rods connected together.

[0008] Preferably, the connecting plate at the joint of the diagonal web member and vertical web member of the auxiliary truss and the upper chord member of the auxiliary truss is a pentagonal structure; the connecting plate at the joint of two diagonal web members of the auxiliary truss and the upper chord member of the auxiliary truss is a pentagonal structure; the connecting plate at the joint of a single vertical web member of the auxiliary truss and the upper chord member of the auxiliary truss is a trapezoidal structure.

[0009] Preferably, the connecting plate at the joint of the diagonal web member and vertical web member of the auxiliary truss and the steel beam to be strengthened is a pentagonal structure; the connecting plate at the joint of a single vertical web member of the auxiliary truss and the steel beam to be strengthened is a trapezoidal structure.

[0010] Preferably, the connecting plate at the joint of the diagonal web member of the auxiliary truss and the steel beam to be strengthened and the existing steel structure column is a diamond-shaped structure.

[0011] The construction method of the steel beam strengthening structure without unloading includes the following steps:

[0012] S1. Design the auxiliary truss: The layout of the diagonal web members and vertical web members of the auxiliary truss is staggered from the equipment load support points on the steel beam to be strengthened; the slenderness ratio of the upper chord member of the auxiliary truss is not greater than 90; both the diagonal web members and vertical web members of the auxiliary truss are made of double angle steels, and their slenderness ratios are not greater than 50; the ratio of the height to the span of the auxiliary truss is not greater than 8;

[0013] S2. Auxiliary truss pre-assembly construction: On a flat construction site, according to the layout of the auxiliary truss, the diagonal web members and vertical web members of the auxiliary truss are welded and connected to the lower flange plate of the upper chord member of the auxiliary truss through connecting plates to complete the assembly construction of the auxiliary truss;

[0014] S3. Hoist the auxiliary truss above the steel beam to be strengthened, weld the upper chord member of the auxiliary truss to the existing steel structure columns on both sides, and then weld the diagonal web members and vertical web members of the auxiliary truss to the upper flange plate of the steel beam to be strengthened through connecting plates;

[0015] S4. After the installation of the auxiliary truss is completed and the welds are cooled, transform the support system of the steel beam to be strengthened; first, remove the original support under the steel beam to be strengthened, and then install the newly-built support.

[0016] The beneficial effects of the present invention are as follows: By setting up an auxiliary truss above the steel beam to be strengthened, during the process of demolishing, reconstructing, and strengthening the diagonal braces arranged below the steel beam to be strengthened, it is not necessary to stop the system operation to demolish the equipment and systems supported by the steel beam to be strengthened. This is a technology that can be widely applied to the strengthening of steel beams and is applicable to all steel beam strengthening where it is impossible to stop the system to unload the load of the original equipment, having broad application prospects. Description of the Drawings

[0017] Figure 1 Schematic diagram of the steel beam strengthening structure without unloading;

[0018] Figure 2 Schematic diagram of the welded connection between the diagonal web member of the auxiliary truss and the existing steel structure column;

[0019] Figure 3 Schematic diagram of the welded connection between the diagonal web member of the auxiliary truss and the upper chord member of the auxiliary truss;

[0020] Figure 4 Schematic diagram of the welded connection between the diagonal web member and the vertical web member of the auxiliary truss and the steel beam to be strengthened;

[0021] Figure 5 Schematic diagram of the welded connection between the vertical web member of the auxiliary truss and the steel beam to be strengthened.

[0022] Description of the reference numerals: Steel beam to be strengthened 1, Upper chord member of the auxiliary truss 2, Diagonal web member of the auxiliary truss 3, Vertical web member of the auxiliary truss 4, Connection plate 5, Equipment load support point component 6, Original support 7, New support 8, Existing steel structure column 9. Detailed Embodiment

[0023] The following further describes the present invention in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0024] Embodiment 1

[0025] As Figures 1 to 5As shown in the figure, Embodiment 1 of the present application provides a steel beam reinforcement structure that does not require unloading, including a steel beam 1 to be reinforced, an auxiliary truss upper chord 2, an auxiliary truss diagonal web member 3, an auxiliary truss vertical web member 4, and a connecting plate 5; the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are made of double angle steel, round steel pipe or square steel pipe. The auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are welded to the lower flange plate of the auxiliary truss upper chord 2 through the connecting plate 5, that is, the connecting plate 5 is welded to the lower part of the lower flange plate of the auxiliary truss upper chord 2, and the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are respectively welded to the connecting plate 5; the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are welded to the upper flange plate of the steel beam 1 to be reinforced through the connecting plate 5, that is, the connecting plate 5 is welded to the upper part of the upper flange plate of the steel beam 1 to be reinforced, and the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are respectively welded to the connecting plate 5; the auxiliary truss diagonal web member 3 is welded to the existing steel structure column 9 through the connecting plate 5, that is, the connecting plate 5 is welded at the intersection of the existing steel structure column 9 and the steel beam 1 to be reinforced, and the auxiliary truss diagonal web member 3 is welded to the connecting plate 5; a new support 8 is arranged below the steel beam 1 to be reinforced, and the new support 8 is composed of inclined bars and vertical bars to enhance the overall stability; an equipment load support point component 6 is provided on the steel beam 1 to be reinforced, and the arrangements of the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are staggered from the equipment load support point component 6. The connecting plate 5 at the joint of the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 and the auxiliary truss upper chord 2 is a pentagonal structure; the connecting plate 5 at the joint of the two auxiliary truss diagonal web members 3 and the auxiliary truss upper chord 2 is a pentagonal structure; the connecting plate 5 at the joint of the single auxiliary truss vertical web member 4 and the auxiliary truss upper chord 2 is a trapezoidal structure. The connecting plate 5 at the joint of the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 and the steel beam 1 to be reinforced is a pentagonal structure; the connecting plate 5 at the joint of the single auxiliary truss vertical web member 4 and the steel beam 1 to be reinforced is a trapezoidal structure; the connecting plate 5 at the joint of the auxiliary truss diagonal web member 3 and the steel beam 1 to be reinforced and the existing steel structure column 9 is a diamond-shaped structure.

[0026] Embodiment 2

[0027] Embodiment 2 of the present application provides a construction method for a steel beam reinforcement structure that does not require unloading, including the following steps:

[0028] S1. Design the auxiliary truss: The arrangements of the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are staggered from the equipment load support point component 6 on the steel beam 1 to be reinforced to avoid conflict and interference. The cross-section of the auxiliary truss upper chord 2 is determined according to the calculation, and it is required that its slenderness ratio is not greater than 90; both the auxiliary truss diagonal web member 3 and the auxiliary truss vertical web member 4 are made of double angle steel, and their cross-sections are determined according to the calculation, and it is required that their slenderness ratios are not greater than 50; the ratio of the height to the span of the auxiliary truss is not greater than 8.

[0029] S2. Auxiliary truss pre-assembly construction: On a flat construction site, according to the layout of the auxiliary truss, the inclined web members 3 and the vertical web members 4 of the auxiliary truss are welded and connected to the lower flange plate of the upper chord member 2 of the auxiliary truss through the connecting plate 5 to complete the assembly construction of the auxiliary truss.

[0030] S3. Hoist the auxiliary truss above the steel beam 1 to be strengthened. First, weld and connect the upper chord member 2 of the auxiliary truss to the existing steel structure columns on both sides, and then weld and connect the inclined web members 3 and the vertical web members 4 of the auxiliary truss to the upper flange plate of the steel beam 1 to be strengthened through the connecting plate 5.

[0031] S4. After the installation of the auxiliary truss is completed and the welds are cooled, carry out the transformation of the support system for the steel beam 1 to be strengthened according to the design drawings. First, remove the original support 7 under the steel beam 1 to be strengthened, and then install the newly built support 8 to complete the construction of the steel beam strengthening structure without unloading.

Claims

1. Construction method of steel beam reinforcement structure without unloading, characterized in that: The steel beam reinforcement structure without unloading includes the steel beam to be reinforced (1), the upper chord of the auxiliary truss (2), the diagonal web members of the auxiliary truss (3), the vertical web members of the auxiliary truss (4) and the connecting plate (5); a new support (8) is arranged below the steel beam to be reinforced (1); The steel beam to be reinforced (1) is provided with equipment load support point components (6); the construction method of the steel beam reinforcement structure without unloading includes: S1. Design the auxiliary truss: the layout of the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) is staggered from the equipment load support point components (6) on the steel beam to be reinforced (1); the slenderness ratio of the upper chord of the auxiliary truss (2) is not greater than 90; both the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) adopt double angle steels, and their slenderness ratios are not greater than 50; the ratio of the height to the span of the auxiliary truss is not greater than 8; S2. Auxiliary truss pre-assembly construction: On a flat construction site, according to the layout of the auxiliary truss, the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) are welded and connected to the lower flange plate of the upper chord of the auxiliary truss (2) through the connecting plate (5) to complete the assembly construction of the auxiliary truss; S3. Hoist the auxiliary truss above the steel beam to be reinforced (1), weld and connect the upper chord of the auxiliary truss (2) with the existing steel structure columns (9) on both sides of it, and then weld and connect the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) with the upper flange plate of the steel beam to be reinforced (1) through the connecting plate (5); S4. After the installation of the auxiliary truss is completed and the welds are cooled, transform the support system of the steel beam to be reinforced (1); first, remove the original support (7) under the steel beam to be reinforced (1), and then install the new support (8).

2. The construction method of the steel beam reinforcement structure without unloading according to claim 1, characterized in that: The diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) adopt double angle steels, round steel pipes or square steel pipes.

3. The construction method of the steel beam reinforcement structure without unloading according to claim 1, characterized in that: The new support (8) is composed of inclined rods and vertical rods connected.

4. The construction method of the steel beam reinforcement structure without unloading according to claim 1, characterized in that: The connecting plate (5) at the joint of the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) and the upper chord of the auxiliary truss (2) is a pentagonal structure; the connecting plate (5) at the joint of the two diagonal web members of the auxiliary truss (3) and the upper chord of the auxiliary truss (2) is a pentagonal structure; the connecting plate (5) at the joint of a single vertical web member of the auxiliary truss (4) and the upper chord of the auxiliary truss (2) is a trapezoidal structure.

5. The construction method of the steel beam reinforcement structure without unloading according to claim 1, characterized in that: The connecting plate (5) at the joint of the diagonal web members of the auxiliary truss (3) and the vertical web members of the auxiliary truss (4) and the steel beam to be reinforced (1) is a pentagonal structure; the connecting plate (5) at the joint of a single vertical web member of the auxiliary truss (4) and the steel beam to be reinforced (1) is a trapezoidal structure.

6. The construction method of the steel beam reinforcement structure without unloading according to claim 1, characterized in that: The connecting plate (5) at the connection of the auxiliary truss diagonal web member (3) with the steel beam to be reinforced (1) and the existing steel structure column (9) is a diamond-shaped structure.

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