A reinforcing method for a steel truss member misaligned connection

Abstract

The application discloses a structure reinforcing method for a steel truss rod piece misaligned connection, and the method comprises the following steps: welding a reinforcing steel plate on the inner concave surface of the misaligned connection of the steel truss rod piece, so that the outer surface of the reinforcing steel plate is aligned on the outer surface of the outer convex steel truss rod piece at the misaligned connection; and reinforcing the structure of the steel truss rod piece at the misaligned connection through the reinforcing steel plate, so that the reinforcing steel plate and the steel truss rod piece bear stress together, and the structural strength, bearing capacity and durability of the misaligned connection of the steel truss rod piece are improved; a non-through slot hole is formed on the reinforcing steel plate from the side far away from the misaligned connection to the side close to the misaligned connection, and the outer surface of the steel truss rod piece at the slot hole is perforated and plug welded, so that the stress concentration of the misaligned connection in the weld area is reduced. The application overcomes the problem that the overall length of the steel truss rod piece is shortened due to cutting and re-welding, and avoids the secondary misaligned connection and structural hidden dangers.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a method for structural reinforcement at misaligned connections of steel truss members. Background Technology

[0002] In the welding construction of steel truss members and other steel structural components, misalignment can easily occur when two steel truss members are welded together, resulting in poor load-bearing performance at the misaligned joint. This affects the overall structural strength, load-bearing capacity, and durability of the extended steel truss member, posing a safety hazard. To overcome this problem, the common practice in this field is to cut and remove the misaligned steel truss members and other steel structural components at the misaligned joint and then re-weld them. The disadvantage of this method is that the cutting process usually requires double-end cutting at both ends of the joint to remove the weld material, thus shortening the overall length of the re-welded steel truss member and affecting its usability. Furthermore, re-aligning and welding cannot guarantee that secondary misalignment will not occur. Summary of the Invention

[0003] The purpose of this invention is to provide a structural reinforcement method for misaligned connections of steel truss members, in order to solve the problems of low structural strength, poor load-bearing capacity, low durability, and stress concentration in the weld area of ​​the misaligned connection of steel truss members, as well as the problem of shortening the overall length of the steel truss members due to cutting and re-welding at the misaligned connection, and to avoid the problem of secondary misalignment connections.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a method for structural reinforcement at the misaligned connection of steel truss members, wherein a reinforcing steel plate is attached to the concave surface of the misaligned connection of the steel truss member and welded to the steel truss member, so that the outer surface of the reinforcing steel plate is aligned with the outer surface of the convex steel truss member at the misaligned connection. The steel truss member is structurally reinforced at the misaligned connection by the reinforcing steel plate, so that the reinforcing steel plate and the steel truss member share the load, thereby improving the structural strength, load-bearing capacity and durability of the misaligned connection of the steel truss member;

[0005] Non-penetrating slots are made in the reinforcing steel plate from the side away from the misaligned connection to the side closer to the misaligned connection. Through the slots, plug welding is performed on the outer surface of the steel truss member where it fits, in order to reduce stress concentration in the weld area at the misaligned connection.

[0006] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the cross-section of the steel truss member is rectangular. When the misalignment of the steel truss member is unidirectional, the steel truss member has two concave surfaces at the misalignment connection, and the reinforcing steel plate consists of two pieces.

[0007] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the cross-section of the steel truss member is rectangular, and when the misalignment of the steel truss member is bidirectional, the steel truss member has four concave surfaces at the misalignment connection, and the reinforcing steel plate consists of four pieces.

[0008] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the reinforcing steel plate is corner-welded to the steel truss member around its perimeter.

[0009] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the reinforcing steel plate is slope-welded to the steel truss member around its perimeter.

[0010] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the slot is a rectangular slot.

[0011] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the rectangular groove is rectangular or square in shape.

[0012] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the slot is a dovetail slot.

[0013] Furthermore, in the structural reinforcement method for misaligned connections of steel truss members provided by the present invention, the length of the reinforcing steel plate is not less than 500mm, the depth of the slot is not less than 150mm, and the width of the slot is not less than 30mm.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The present invention provides a structural reinforcement method for misaligned connections of steel truss members. This method involves welding reinforcing steel plates to the misaligned connections to strengthen the steel truss members. By having the reinforcing steel plates and the steel truss members share the load, the structural strength, load-bearing capacity, and durability of the misaligned connections are improved. Furthermore, through-hole plug welding is performed on the outer surface of the steel truss members at the slotted connection point to reduce stress concentration in the weld area. Compared to cutting and re-welding methods, this method overcomes the problem of shortened overall length of the steel truss members and avoids secondary misalignment, thus eliminating the structural safety hazards associated with misaligned connections. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a cross-sectional structure showing a two-way misalignment at the misaligned connection of steel truss members;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure after the steel truss members have been reinforced by forming a two-way misalignment at the misaligned connection.

[0018] Figure 3 This is a front view of the structure after structural reinforcement is carried out at the misaligned connection of the steel truss members to form a two-way misalignment.

[0019] Figure 4 This is a diagram showing the state of a steel truss member after it has been reinforced by unidirectional misalignment at the misaligned connection point and used as a diagonal web member.

[0020] Figure 5 This is a three-dimensional structural diagram of the steel truss members after structural reinforcement is carried out at the misaligned connection points where unidirectional misalignment is formed.

[0021] As shown in the figure:

[0022] 101. Steel truss members; 102. Reinforcing steel plates; 103. Slots. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0024] Please refer to Figures 1 to 5 This invention provides a method for structural reinforcement at misaligned connections of steel truss members. A reinforcing steel plate 102 is welded to the concave surface of the misaligned connection of the steel truss member 101, aligning its outer surface with the convex outer surface of the steel truss member 101 at the misalignment. The reinforcing steel plate 102 strengthens the steel truss member 101 at the misalignment, allowing it to share the load with the steel truss member, thereby improving the structural strength, load-bearing capacity, and durability of the misaligned connection.

[0025] A non-penetrating slot 103 is made on the reinforcing steel plate 102 from the side away from the misaligned connection to the side near the misaligned connection. Through the slot 103 and the outer surface of the steel truss member 101 where they fit together, a through-hole plug weld is performed to reduce the stress concentration at the misaligned connection in the weld area.

[0026] Please refer to Figures 4 to 5 The structural reinforcement method for misaligned connections of steel truss members provided in this embodiment of the invention has a rectangular cross-section for the steel truss member 101. When the misaligned connection of the steel truss member 101 is unidirectionally misaligned, the steel truss member 101 has two concave surfaces at the misaligned connection, and the reinforcing steel plate 102 consists of two pieces.

[0027] Please refer to Figures 2 to 3The structural reinforcement method for misaligned connections of steel truss members provided in this embodiment of the invention has a rectangular cross-section for the steel truss member 101. When the misaligned connection of the steel truss member 101 is bidirectionally misaligned, the steel truss member 101 has four concave surfaces at the misaligned connection, and the reinforcing steel plate 102 consists of four pieces.

[0028] The structural reinforcement method for misaligned connections of steel truss members provided in this embodiment of the invention strengthens the steel truss member 101 at the misaligned connection by welding a reinforcing steel plate 102. This allows the reinforcing steel plate 102 to share the load with the steel truss member, thereby improving the structural strength, load-bearing capacity, and durability of the misaligned connection. Furthermore, through-hole plug welding is performed on the outer surface of the steel truss member 101 at the interface with the slot 103 to reduce stress concentration in the weld area at the misaligned connection. Compared to the cutting and re-welding method, this method overcomes the problem of shortened overall length of the steel truss member 101 and avoids the problem of secondary misaligned connections, thus overcoming the structural safety hazards present at the misaligned connection of the steel truss member 101.

[0029] Please refer to Figures 3 to 4 In order to improve the welding quality, the structural reinforcement method for the misaligned connection of steel truss members provided in this embodiment of the invention can be a fillet weld or a bevel weld between the reinforcing steel plate 102 and the steel truss member 101.

[0030] Please refer to Figure 3 To avoid stress concentration in the weld area, the structural reinforcement method for misaligned connections of steel truss members provided in this embodiment of the invention allows the slot 103 to be either a rectangular slot or a dovetail slot. The rectangular slot can be either rectangular or square.

[0031] Please refer to Figure 3 In order to improve structural strength, the structural reinforcement method for misaligned connections of steel truss members provided in this embodiment of the invention has the following characteristics: the length of the reinforcing steel plate 102 is not less than 500 mm, the depth of the slot 103 is not less than 150 mm, and the width of the slot 103 is not less than 30 mm.

[0032] The structural reinforcement method for misaligned connections of steel truss members provided in this invention can solve the problems of low structural strength, low load-bearing capacity, and poor durability caused by welding misalignment at the connection point during the extension construction of steel truss members. By reinforcing the welding deviation of the steel structure with reinforcing steel plates, the structural strength, load-bearing capacity, and durability of the welded joint are improved, compensating for the stress deviation caused by welding misalignment of steel truss members and other steel components. This effectively solves the structural safety hazards caused by welding misalignment of truss members and avoids the rework problem of cutting and re-welding.

[0033] The structural reinforcement method for misaligned connections of steel truss members provided in this invention can effectively improve the load-bearing capacity of misaligned welded steel truss members without dismantling the original structure, reduce the risk of stress concentration, and is simple to construct and highly reliable. It is applicable to the repair of misaligned members in various steel structure projects.

[0034] For example, taking the misaligned welding of diagonal web members in a large-span cantilever steel truss project as an example, the misalignment size is 28mm. The original steel component wall thickness is 40mm, and the effective wall thickness after misalignment is only 12mm. A reinforcing steel plate of 40mm-12mm=28mm is used to weld the misaligned connection to restore the load-bearing wall thickness of the misaligned connection to 40mm, thereby improving the structural strength of the misaligned connection.

[0035] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A method for structural reinforcement at misaligned connections of steel truss members, characterized in that, A reinforcing steel plate is welded to the concave surface of the misaligned connection of the steel truss member and then onto the steel truss member. The outer surface of the reinforcing steel plate is aligned with the outer surface of the convex steel truss member at the misaligned connection. The steel truss member is structurally reinforced at the misaligned connection by the reinforcing steel plate. The reinforcing steel plate and the steel cable tray member share the load, thereby improving the structural strength, load-bearing capacity and durability of the misaligned connection of the steel truss member. Non-penetrating slots are made in the reinforcing steel plate from the side away from the misaligned connection to the side closer to the misaligned connection. Through the slots, plug welding is performed on the outer surface of the steel truss member where it fits, in order to reduce stress concentration in the weld area at the misaligned connection.

2. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The cross-section of the steel truss member is rectangular. When the misalignment of the steel truss member is unidirectional, there are two concave surfaces at the misalignment of the steel truss member, and there are two reinforcing steel plates.

3. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The cross-section of the steel truss member is rectangular. When the misalignment of the steel truss member is bidirectional, there are four concave surfaces at the misalignment of the steel truss member and four reinforcing steel plates.

4. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The reinforcing steel plate is corner welded to the steel truss members around its perimeter.

5. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The reinforcing steel plate is welded to the steel truss members on all four sides.

6. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The slot is a rectangular slot.

7. The structural reinforcement method for misaligned connections of steel truss members according to claim 6, characterized in that, The rectangular groove is either rectangular or square in shape.

8. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The slot is a dovetail slot.

9. The structural reinforcement method for misaligned connections of steel truss members according to claim 1, characterized in that, The length of the reinforcing steel plate is not less than 500mm, the depth of the slot is not less than 150mm, and the width of the slot is not less than 30mm.

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