Fabricated composite steel beam

Abstract

The utility model discloses an assembled superimposed type steel beam belongs to steel trestle technical field. The utility model discloses a lattice column, the upper surface of lattice column is paved with crossbeam, and the upper surface of crossbeam is paved with stringer, the connecting place of lattice column and crossbeam, the connecting place of crossbeam and stringer all are provided with limit card iron. The utility model is the partial steel support node of application in full steel trestle, after the assembly of lattice column, crossbeam and stringer are completed, can pave trestle board on the surface of stringer to build out full steel trestle quickly, this structure can factory pre -processing, pre -manufacture, and the on -the -spot quick assembly can greatly reduce the construction period, and save time cost. Besides, lattice column, crossbeam, stringer, limit card iron can all be recycled, and energy -conserving, environment -friendly and efficient. The connecting node is limited through limit card iron, and the middle stress release round hole can effectively release stress, avoid tearing, improve the connecting stability of each part and the service life of overall steel support structure.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, and more specifically, to a prefabricated composite steel beam. Background Technology

[0002] Currently, my country has long faced management challenges and construction cost pressures due to the wide variety and complex specifications of materials used in temporary bridge projects, especially steel temporary bridges and steel trestle bridges. To address this challenge, the concept of "composite steel beams" has been proposed, aiming to simplify the structure and standardize materials through the combination of components.

[0003] However, the drawbacks of traditional composite steel beams are becoming increasingly apparent when used as temporary structures. On the one hand, their component connection methods are relatively fixed, resulting in low turnover efficiency and making it difficult to meet the requirements of modern construction for rapid disassembly and reuse. On the other hand, in order to meet load-bearing requirements, traditional designs often tend to be conservative, resulting in high steel consumption in the overall structure and poor economic efficiency.

[0004] In actual engineering selection, engineers often face a dilemma: if Bailey bridges are used, their fixed height and lack of flexibility make them unsuitable for many working conditions; if single steel beams are used directly, their limited cross-sectional dimensions result in insufficient bending stiffness and load-bearing capacity, making it difficult to meet the requirements of large spans or heavy loads.

[0005] To overcome the shortcomings of existing technologies, this utility model provides a prefabricated composite steel beam. This structural form not only significantly increases the beam's moment of inertia through the combination effect, thereby effectively improving its structural stiffness and bending resistance, but also, with its modular and standardized design, achieves efficient assembly, disassembly, and recycling of components, greatly improving material turnover efficiency and providing a more economical, efficient, and flexible solution for temporary bridge structures. Utility Model Content

[0006] 1. Technical problem to be solved by the utility model

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a prefabricated composite steel beam. This structure can be pre-processed and pre-manufactured in the factory and quickly assembled on-site, significantly reducing construction time and saving time and costs. Furthermore, the lattice columns, beams, longitudinal beams, and limiting brackets are all recyclable, making it energy-saving, environmentally friendly, and highly efficient. The connection nodes are controlled by limiting brackets, and the central stress-relieving circular holes effectively release stress, preventing tearing and improving the connection stability of each component and the service life of the overall steel support structure.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0010] This utility model discloses a prefabricated composite steel beam, comprising lattice columns, crossbeams, and longitudinal beams. The upper surface of the lattice columns is covered with crossbeams, and the upper surface of the crossbeams is covered with longitudinal beams. Limiting brackets are provided at the connection between the lattice columns and crossbeams, and at the connection between the crossbeams and longitudinal beams.

[0011] The limiting clamp includes a first rectangular block and a second rectangular block, and a stress relief circular hole is provided at the connection between the first rectangular block and the second rectangular block.

[0012] Furthermore, multiple sets of limiting brackets are symmetrically arranged on both sides of the connection between the lattice column and the crossbeam. The limiting brackets on the same side are spaced apart from each other. The bottom of the first rectangular block of each set of limiting brackets is welded to the upper surface of the lattice column, and the second rectangular block of each set of limiting brackets contacts the inner surface of the lower flange of the crossbeam.

[0013] Furthermore, multiple sets of limiting brackets are symmetrically arranged on both sides of the connection between the crossbeam and the longitudinal beam. The limiting brackets on the same side are spaced apart from each other. The bottom of the first rectangular block of each set of limiting brackets is welded to the outer surface of the upper flange of the crossbeam, and the second rectangular block of each set of limiting brackets is in contact with the inner surface of the lower flange of the longitudinal beam.

[0014] Furthermore, the aforementioned crossbeams are provided in multiple sets and are laid in an overlapping manner. The uppermost crossbeam is limited to the longitudinal beam by limiting iron; the lowermost crossbeam is limited to the lattice column by limiting iron, and adjacent crossbeams are fastened together by bolts.

[0015] Furthermore, the longitudinal beams are provided in multiple sets and are arranged horizontally in a continuous laying manner. Limiting brackets are respectively provided on the outer side of the longitudinal beams at both ends. The multiple sets of longitudinal beams are limited together with the crossbeams under the action of the limiting brackets.

[0016] Furthermore, multiple sets of crossbeams are provided and arranged horizontally in a continuous laying manner. Limiting brackets are provided on the outer side of the crossbeams at both ends. Under the action of the limiting brackets, the multiple sets of crossbeams are limited together with the lattice columns. Limiting brackets are provided on the upper surface of each set of crossbeams. Under the action of the limiting brackets, the multiple sets of crossbeams are limited together with the longitudinal beams.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0019] This utility model relates to a local node in an all-steel trestle bridge. After the lattice columns, crossbeams, and longitudinal beams are assembled, trestle panels can be laid on the surface of the longitudinal beams, thereby quickly constructing an all-steel trestle bridge. By adopting the prefabricated composite steel beams in this embodiment, factory pre-processing and pre-manufacturing can be achieved, allowing for rapid assembly and construction in the on-site construction environment. The strength of the assembled all-steel trestle bridge remains unchanged, significantly reducing the construction period and saving construction time and costs. At the same time, the lattice columns, crossbeams, longitudinal beams, and limiting brackets are all recyclable structures that can be reused multiple times, making them energy-saving, environmentally friendly, and highly efficient. The connection nodes of the lattice columns, crossbeams, and longitudinal beams are limited by limiting brackets, and the stress-relieving circular holes in the middle of the limiting brackets effectively release stress, preventing the limiting brackets from being torn by the compression of the steel. This improves the stability of the interconnection between the lattice columns, crossbeams, and longitudinal beams and also increases the service life of the overall structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 The three-dimensional structure of the limiting clamp of this utility model Figure 1 ;

[0022] Figure 3 The three-dimensional structure of the limiting clamp of this utility model Figure 2 ;

[0023] Figure 4 This is the main view of the double-layer crossbeam stacking structure of this utility model;

[0024] Figure 5 This is a side view of the double-layer crossbeam stacking structure of this utility model;

[0025] Figure 6 This is a partially enlarged view of the installation of the limiting clamp of this utility model;

[0026] Figure 7 This is a structural diagram of the horizontal laying of the double-layer longitudinal beams of this utility model;

[0027] Figure 8 Exploded view of the horizontally laid double-layer longitudinal beam structure of this utility model;

[0028] Figure 9 This is a front view of the horizontally laid double-layer longitudinal beam structure of this utility model.

[0029] Figure 10 Side view of the horizontally laid double-layer longitudinal beam structure of this utility model;

[0030] Figure 11 This is a schematic diagram of the horizontal laying structure of the double-layer crossbeam of this utility model;

[0031] Figure 12 Exploded view of the horizontally laid double-layer beam structure of this utility model;

[0032] Figure 13 This is a front view of the horizontally laid double-layer beam structure of this utility model.

[0033] Figure 14 This is a front view of the horizontally laid double-layer beam structure of this utility model.

[0034] In the diagram: 1. Lattice column; 2. Horizontal beam; 3. Longitudinal beam; 4. Limiting bracket; 401. First rectangular block; 402. Second rectangular block; 403. Stress relief hole. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] Example 1

[0037] from Figure 1-6 As can be seen, a prefabricated composite steel beam in this embodiment includes a lattice column 1, a crossbeam 2 and a longitudinal beam 3. The upper surface of the lattice column 1 is covered with the crossbeam 2, and the upper surface of the crossbeam 2 is covered with the longitudinal beam 3. Limiting brackets 4 are provided at the connection between the lattice column 1 and the crossbeam 2, and at the connection between the crossbeam 2 and the longitudinal beam 3.

[0038] The limiting bracket 4 includes a first rectangular block 401 and a second rectangular block 402, and a stress relief circular hole 403 is provided at the connection between the first rectangular block 401 and the second rectangular block 402.

[0039] Multiple sets of limiting brackets 4 are symmetrically arranged on both sides of the connection between the lattice column 1 and the crossbeam 2. The limiting brackets 4 on the same side are spaced apart from each other. The bottom of the first rectangular block 401 of each set of limiting brackets 4 is welded to the upper surface of the lattice column 1, and the second rectangular block 402 of each set of limiting brackets 4 is in contact with the inner surface of the lower flange of the crossbeam 2.

[0040] Multiple sets of limiting brackets 4 are symmetrically arranged on both sides of the connection between the crossbeam 2 and the longitudinal beam 3. The limiting brackets 4 on the same side are spaced apart from each other. The bottom of the first rectangular block 401 of each set of limiting brackets 4 is welded to the outer surface of the upper flange of the crossbeam 2, and the second rectangular block 402 of each set of limiting brackets 4 is in contact with the inner surface of the lower flange of the longitudinal beam 3.

[0041] This utility model relates to a partial steel support node used in an all-steel trestle bridge. After the lattice column 1, crossbeam 2, and longitudinal beam 3 are assembled, trestle panels can be laid on the surface of the longitudinal beam 3, thereby quickly constructing an all-steel trestle bridge. By adopting the prefabricated composite steel beams in this embodiment, factory pre-processing and pre-manufacturing can be achieved, allowing for rapid assembly and construction in the on-site construction environment. The strength of the constructed all-steel trestle bridge remains unchanged, significantly reducing the construction period and saving construction time and costs. At the same time, the lattice column 1, crossbeam 2, longitudinal beam 3, and limiting bracket 4 are all recyclable structures that can be reused multiple times, making them energy-saving, environmentally friendly, and highly efficient. The connection nodes of the lattice column 1, crossbeam 2, and longitudinal beam 3 are limited by the limiting bracket 4, and the stress-relieving circular hole 403 in the middle of the limiting bracket 4 effectively releases stress, preventing the limiting bracket 4 from being torn by the compression of the steel. This improves the stability of the interconnection between the lattice column 1, crossbeam 2, and longitudinal beam 3, and also increases the service life of the overall structure.

[0042] In this embodiment, there are multiple sets of crossbeams 2, which are laid in an overlapping manner. This method can improve the shear bearing capacity by adjusting the height of the crossbeams, thereby meeting the design requirements. The uppermost crossbeam 2 is limited to the longitudinal beam 3 by the limiting iron 4; the lowermost crossbeam 2 is limited to the lattice column 1 by the limiting iron 4, and adjacent crossbeams 2 are fastened together by bolts.

[0043] Example 2

[0044] from Figure 7-10 As can be seen, the prefabricated composite steel beam of this embodiment includes a lattice column 1, a crossbeam 2 and a longitudinal beam 3; multiple sets of longitudinal beams 3 are provided and arranged horizontally in a continuous laying manner, and limit clamps 4 are respectively provided on the outer side of the longitudinal beams 3 at both ends, and the multiple sets of longitudinal beams 3 are limited together with the crossbeams 2 under the action of the limit clamps 4.

[0045] In this embodiment, a trestle plate or a patterned H-beam can be laid on the upper surface of the longitudinal beam 3. By increasing the contact area between the longitudinal beam 3 and the bridge deck, the stability of the trestle plate or the patterned H-beam after installation is improved, the support strength of local nodes is enhanced, and their displacement is prevented.

[0046] Example 3

[0047] from Figure 11-14 As can be seen, a prefabricated composite steel beam in this embodiment includes a lattice column 1, a horizontal beam 2, and a longitudinal beam 3;

[0048] Multiple sets of crossbeams 2 are arranged horizontally in a continuous manner. Limiting brackets 4 are installed on the outer side of the crossbeams 2 at both ends. The multiple sets of crossbeams 2 are limited together with the lattice column 1 under the action of the limiting brackets 4. The upper surface of each set of crossbeams 2 is provided with limiting brackets 4. The multiple sets of crossbeams 2 are limited together with the longitudinal beam 3 under the action of the limiting brackets 4.

[0049] By having multiple sets of crossbeams 2 jointly support the longitudinal beam 3, the local pressure can be reduced, the compressive strength of local nodes can be enhanced, and their deformation under stress can be prevented.

[0050] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A prefabricated composite steel beam, comprising lattice columns (1), crossbeams (2), and longitudinal beams (3), characterized in that: The upper surface of the lattice column (1) is covered with a crossbeam (2), and the upper surface of the crossbeam (2) is covered with a longitudinal beam (3); limit clamps (4) are provided at the connection between the lattice column (1) and the crossbeam (2), and at the connection between the crossbeam (2) and the longitudinal beam (3); The limiting clamp (4) includes a first rectangular block (401) and a second rectangular block (402), and a stress relief circular hole (403) is provided at the connection between the first rectangular block (401) and the second rectangular block (402).

2. The prefabricated composite steel beam according to claim 1, characterized in that: Multiple sets of limiting brackets (4) are symmetrically arranged on both sides of the connection between the lattice column (1) and the crossbeam (2). The limiting brackets (4) on the same side are spaced apart from each other. The bottom of the first rectangular block (401) of each set of limiting brackets (4) is welded to the upper surface of the lattice column (1), and the second rectangular block (402) of each set of limiting brackets (4) is in contact with the inner surface of the lower flange of the crossbeam (2).

3. The prefabricated composite steel beam according to claim 1, characterized in that: Multiple sets of limiting brackets (4) are symmetrically arranged on both sides of the connection between the crossbeam (2) and the longitudinal beam (3). The limiting brackets (4) on the same side are spaced apart from each other. The bottom of the first rectangular block (401) of each set of limiting brackets (4) is welded to the outer surface of the upper flange of the crossbeam (2), and the second rectangular block (402) of each set of limiting brackets (4) is in contact with the inner surface of the lower flange of the longitudinal beam (3).

4. The prefabricated composite steel beam according to claim 1, characterized in that: The crossbeams (2) are arranged in multiple sets and are laid in an overlapping manner. The uppermost crossbeam (2) is limited to the longitudinal beam (3) by the limiting iron (4); the lowermost crossbeam (2) is limited to the lattice column (1) by the limiting iron (4), and the adjacent crossbeams (2) are fastened together by bolts.

5. The prefabricated composite steel beam according to claim 1, characterized in that: The longitudinal beams (3) are arranged in multiple sets and are laid horizontally in a continuous manner. Limiting irons (4) are respectively set on the outer side of the longitudinal beams (3) at both ends. The multiple sets of longitudinal beams (3) are limited together with the crossbeams (2) under the action of the limiting irons (4).

6. The prefabricated composite steel beam according to claim 1, characterized in that: The crossbeams (2) are arranged in multiple sets and are laid horizontally in a continuous manner. Limiting brackets (4) are respectively set on the outer side of the crossbeams (2) at both ends. The multiple sets of crossbeams (2) are limited together with the lattice column (1) under the action of the limiting brackets (4). The upper surface of each set of crossbeams (2) is set with limiting brackets (4). The multiple sets of crossbeams (2) are limited together with the longitudinal beam (3) under the action of the limiting brackets (4).

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