Fabricated steel bar truss

Abstract

The utility model discloses an assembly type steel bar truss, and relates to the technical field of steel bar trusses, at least two groups of truss mechanisms are included, each truss mechanism comprises an upper chord rib, diagonal web member ribs are arranged at two side ends of the upper chord rib, bevel sections are arranged at the lower ends of the two diagonal web member ribs, second lower chord ribs are arranged at the ends, away from each other, of the two bevel sections, and the second lower chord ribs are arranged at the lower ends of the two diagonal web member ribs. Two second lower chord ribs are arranged at the two ends of each diagonal web member rib, a bevel section is arranged between the two diagonal web member ribs, the bevel section is in a circular arc shape, the included angle between the bevel section and the plane formed by the two second lower chord ribs is 0-90 degrees, and first lower chord ribs are arranged at the ends, away from each other, of the two diagonal web member ribs. When the structure tends to deform due to stress, the reinforcing pull rods limit the relative displacement of the truss mechanism and prevent the structure from generating excessive deformation through the tensile and compressive properties of the reinforcing pull rods, so that the overall stability of the fabricated steel bar truss under the condition of complex stress is ensured, and various loads are effectively borne.

Description

Technical Field

[0001] This utility model relates to the field of steel truss technology, and in particular to a prefabricated steel truss. Background Technology

[0002] A composite load-bearing slab that connects a steel truss and a concrete base slab through steel reinforcement anchoring is called a reinforced concrete truss floor deck. Reinforced concrete truss floor decks can be produced mechanically, which is conducive to uniform steel reinforcement spacing and consistent concrete cover thickness, thus improving the construction quality of the floor slab. Prefabricated steel truss floor decks can significantly reduce the amount of on-site steel reinforcement binding work, speed up the construction progress, increase construction safety, and achieve civilized construction.

[0003] Reinforced concrete truss floor slabs include the following structures:

[0004] Top chord reinforcement: usually located at the top of the truss, mainly bearing tensile force.

[0005] Bottom chord reinforcement: Located at the bottom of the truss, corresponding to the top chord reinforcement, its main function is also to bear tensile force.

[0006] Web reinforcement: connects the top and bottom chord reinforcements and mainly bears shear force.

[0007] Profiled steel sheet: This is the bottom part of the floor decking, which is in direct contact with the concrete, and comes in various shapes.

[0008] Anchor reinforcement bars: used to anchor the floor deck to the surrounding structure (such as beams and columns), enhancing the stability of the floor deck in the entire building structure.

[0009] Common steel trusses are not optimized in terms of force transmission path and stress distribution, which limits the load-bearing capacity and stability of the structure. Moreover, the connection between steel bars is often not strong and reliable enough, and is prone to loosening and deformation under long-term use and complex stress conditions. Utility Model Content

[0010] Technical problems to be solved

[0011] To address the shortcomings of existing technologies, this utility model provides a prefabricated steel truss that solves the problems of insufficient optimization in force transmission path and stress distribution in common steel trusses, which leads to limited structural load-bearing capacity and stability. Moreover, the connection between steel bars is often not strong and reliable enough, and is prone to loosening and deformation under long-term use and complex stress conditions.

[0012] Technical solution

[0013] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated steel truss, comprising at least two sets of truss mechanisms, each truss mechanism including an upper chord, with diagonal web members at both ends of the upper chord, each lower end of the two diagonal web members having a bend segment, and each disjoint end of the two bend segments having a second lower chord, the bend segment being arc-shaped, the angle between the bend segment and the plane formed by the two second lower chords being 0°~90°, each disjoint end of the two diagonal web members having a first lower chord, and a reinforcing tie rod fixedly installed between adjacent second lower chords in both sets of truss mechanisms, the reinforcing tie rod being cross-shaped.

[0014] Preferably, the angled section and the second lower chord are both embedded in the concrete base slab, the diagonal web reinforcement is connected to the upper chord and the first lower chord by resistance spot welding, the angle between the diagonal web reinforcement and the angled section is processed by a bending machine, and the angled section is connected to the second lower chord by resistance spot welding.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] I. This new type of reinforcement tie rod is installed between two sets of steel trusses, so that it plays a role between the two sets of truss mechanisms. When the structure tends to deform due to stress, the reinforcement tie rod restricts the relative displacement of the truss mechanism through its own tensile and compressive strength, prevents the structure from generating excessive deformation, ensures the overall stability of the prefabricated steel truss under complex stress conditions, and effectively bears various loads.

[0017] II. This new type of steel truss increases the anchorage force between the steel truss and the concrete base plate by bending the bottom of the diagonal web reinforcement with a bending machine and then adjusting the angle between the angled section and the plane formed by the two second lower chord reinforcements to 0°~90°. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural diagram of the entire utility model;

[0020] Figure 2 This is a structural diagram of the upper chord rib of this utility model;

[0021] Figure 3 This is a structural diagram of the reinforcing tie rod of this utility model.

[0022] Legend: 11. Top chord; 12. Diagonal web reinforcement; 13. First bottom chord; 14. Angle section; 15. Second bottom chord; 16. Reinforcing tie rod. Detailed Implementation

[0023] This application provides a prefabricated steel truss, which effectively solves the technical problems of common steel trusses having insufficient optimization in terms of force transmission path and stress distribution, resulting in limited structural bearing capacity and stability. Moreover, the connection method between steel bars is often not strong and reliable enough, and is prone to loosening and deformation under long-term use and complex stress conditions.

[0024] Example

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the technical solution in this application aims to effectively address the common problems of insufficient optimization in the force transmission path and stress distribution of steel trusses, which leads to limited structural bearing capacity and stability. Furthermore, the connection methods between steel bars are often not strong and reliable enough, easily resulting in loosening and deformation under long-term use and complex stress conditions. The overall approach is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a prefabricated steel truss, comprising at least two sets of truss mechanisms. Each truss mechanism includes an upper chord 11, with diagonal web members 12 at both ends. The lower ends of each diagonal web member 12 are provided with angled sections 14, and the separated ends of each angled section 14 are provided with second lower chord members 15. The angled sections 14 are arc-shaped, and the angle between the angled sections 14 and the plane formed by the two second lower chord members 15 is 0° to 90°. The upper chord 11 is a crucial component of the truss structure, serving as a primary compression member and playing a vital load-bearing role in the structure. Both ends of the reinforcing bar 11 are provided with diagonal web reinforcement bars 12. These diagonal web reinforcement bars 12 play a key role in connection and force transmission. The lower ends of the two diagonal web reinforcement bars 12 are provided with bend sections 14. The design of this angle range is to optimize the force distribution and transmission path of the structure. By precisely processing this angle with a bending machine, it can be ensured that the connection angle between the diagonal web reinforcement bars 12 and the bend sections 14 meets the requirements of structural mechanics, thereby achieving the best force transmission and structural stability. When the structure is under load, this angle design can effectively distribute the vertical load to different directions, avoid stress concentration, and improve the overall load-bearing capacity of the structure.

[0027] Each of the two diagonal web members 12 has a first lower chord 13 at its disjoint ends. Together with the diagonal web members 12, they form the frame of the truss. The diagonal web members 12 are connected to the upper chord 11 and the first lower chord 13 by resistance spot welding. Resistance spot welding is an efficient and reliable connection method. It can not only ensure a firm connection, but also guarantee the strength and stability of the connection node, avoiding structural failure caused by loosening of the node during long-term use. Through resistance spot welding, the diagonal web members 12 can effectively transfer the load borne by the upper chord 11 to the first lower chord 13, realizing the balanced transfer of internal forces in the structure.

[0028] Reinforcing tie rods 16 are fixedly installed between adjacent second lower chord reinforcements 15 in both sets of truss structures. The reinforcing tie rods 16 are cross-shaped. Second lower chord reinforcements 15 are provided at the disjointed ends of the two bend segments 14. The bend segments 14 and the second lower chord reinforcements 15 are connected by resistance spot welding, which further enhances the overall integrity of the structure. The introduction of reinforcing tie rods 16 greatly improves the lateral stability and shear resistance of the entire prefabricated steel truss. When the structure is subjected to lateral loads or deforms, the reinforcing tie rods 16 can effectively limit the relative displacement between adjacent truss structures and prevent the structure from twisting or shearing failure due to uneven stress.

[0029] The angled section 14 and the second lower chord reinforcement 15 are both embedded in the concrete base slab. The diagonal web reinforcement 12 is connected to the upper chord reinforcement 11 and the first lower chord reinforcement 13 by resistance spot welding. The angle between the diagonal web reinforcement 12 and the angled section 14 is processed by a bending machine. The angled section 14 and the second lower chord reinforcement 15 are connected by resistance spot welding.

[0030] Working principle:

[0031] The first step involves using a bending machine to process the diagonal web reinforcement 12, creating a specific angle of 30-90° between it and the bend segment 14. This ensures the bending accuracy of the reinforcement and lays the foundation for subsequent assembly. The diagonal web reinforcement 12 is then firmly connected to the upper chord reinforcement 11 and the first lower chord reinforcement 13 via resistance spot welding. Similarly, the bend segment 14 is connected to the second lower chord reinforcement 15 using resistance spot welding, forming a single truss structure. Resistance spot welding ensures the strength of the weld points, making the reinforcement connections tight and guaranteeing the integrity and stability of the truss structure. Multiple truss structures are then assembled according to design requirements. Cross-shaped reinforcing tie rods 16 are installed between the second lower chord reinforcements 15 of adjacent truss structures to further enhance the overall structural stability, completing the fabrication of the prefabricated steel truss.

[0032] The second step involves transporting the prefabricated steel truss to the construction site and accurately embedding the angled section 14 and the second lower chord reinforcement 15 in the corresponding positions on the concrete base slab. During the concrete pouring process, the steel truss acts as a skeleton, providing support for the concrete and ensuring that it maintains a stable shape during pouring and solidification. At the same time, the bond between the steel reinforcement and the concrete enables them to work together.

[0033] Thirdly, when the prefabricated steel truss is put into use to bear loads, the top chord 11 mainly bears the compressive force, distributing the load from the upper part to the diagonal web reinforcement 12. The diagonal web reinforcement 12 transmits the pressure of the top chord 11 to the first bottom chord 13 and the angled section 14. During this process, the diagonal web reinforcement 12 is subjected to tension or compression. Its angle design optimizes the force transmission path, making the structural stress more reasonable. The angled section 14 transmits the force to the second bottom chord 15 embedded in the concrete base slab. The concrete base slab generates a reaction force on the second bottom chord 15, restraining the deformation of the steel truss. This new invention uses cross-shaped reinforcing tie rods 16 set between the two sets of steel trusses to ensure that the two... The truss mechanism plays a role in preventing excessive deformation of the structure when the structure tends to deform under stress. The reinforcing tie rod 16, through its tensile and compressive strength, limits the relative displacement of the truss mechanism, prevents excessive deformation of the structure, and ensures the overall stability of the prefabricated steel truss under complex stress conditions. It effectively bears various loads. This new type of steel truss uses a bending machine to bend the bottom of the diagonal web reinforcement 12, and then adjusts the angle between the angled section 14 and the plane formed by the two second lower chord reinforcements 15 to 0°~90°. When the angled section 14 and the second lower chord reinforcement 15 are embedded in the concrete base plate, the anchorage force between the steel truss and the concrete base plate can be increased, which effectively improves the efficiency of the steel truss.

[0034] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A prefabricated steel truss, comprising at least two sets of truss mechanisms, characterized in that: The truss mechanism includes an upper chord (11), both ends of which are provided with diagonal web members (12), the lower ends of the two diagonal web members (12) are provided with bend sections (14), and the separated ends of the two bend sections (14) are provided with second lower chord members (15). The angle segment (14) is arc-shaped, and the angle between the angle segment (14) and the plane formed by the two second lower chords (15) is 0°~90°. Among them, the two diagonal web reinforcements (12) are provided with a first lower chord reinforcement (13) at their opposite ends, and a reinforcing tie rod (16) is fixedly installed between the adjacent second lower chord reinforcements (15) in the two sets of truss mechanisms. The reinforcing tie rod (16) is in the shape of a cross.

2. The prefabricated steel truss according to claim 1, characterized in that: The angled section (14) and the second lower chord reinforcement (15) are both embedded in the concrete base slab.

3. A prefabricated steel truss according to claim 2, characterized in that: The diagonal web bar (12) is connected to the upper chord bar (11) and the first lower chord bar (13) by resistance spot welding.

4. A prefabricated steel truss according to claim 3, characterized in that: The angle between the diagonal web bar (12) and the angled section (14) is processed by a bending machine.

5. A prefabricated steel truss according to claim 4, characterized in that: The angled segment (14) and the second lower chord (15) are connected by resistance spot welding.

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