Micro-deflection light heavy-load steel truss girder

Abstract

The utility model discloses a micro-deflection light heavy load steel truss girder, which relates to the technical field of truss girders, and comprises two groups of lower main girders, two groups of lower cross bars, two groups of vertical reinforcing ribs, two groups of transverse reinforcing ribs, two groups of diagonal bars, two groups of upper main girders and two groups of upper cross bars, upper transverse rods which are uniformly distributed are fixedly connected between the upper main beams, inclined supporting rods which are uniformly distributed are fixedly connected between the lower main beams and the upper main beams, and the inclined supporting rods are distributed between the lower main beams and the upper main beams in an M shape; the truss girder has excellent bending resistance and shearing resistance, can bear large bending and shearing force, ensures that the deflection of the truss girder is kept within a small range under the heavy load condition through reasonable structural layout and application of high-strength materials, and improves the use performance and the structural strength of the structure.

Description

Technical Field

[0001] This utility model relates to the field of truss technology, specifically a micro-deflection lightweight heavy-duty steel truss. Background Technology

[0002] With the rapid development of modern construction engineering, the performance requirements for structural materials and components are becoming increasingly stringent. Steel trusses, due to their excellent load-bearing capacity and weight-to-weight ratio, are widely used in large-scale buildings such as bridges, industrial plants, and warehouses. However, traditional steel trusses have some shortcomings in their design and manufacturing processes, particularly in terms of micro-deflection and lightweight design. Micro-deflection refers to the characteristic of a structure exhibiting minimal deformation under load, which is especially important in special applications (such as high-precision equipment support, airports, and rail transit). Traditional heavy-duty steel trusses, while bearing heavy loads, often struggle to control their micro-deflection, affecting the structure's performance and potentially leading to equipment failure or safety hazards.

[0003] Therefore, those skilled in the art have provided a micro-deflection lightweight heavy-duty steel truss to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a low-deflection lightweight heavy-duty steel truss girder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-deflection lightweight heavy-duty steel truss includes a lower main beam, a lower crossbar, vertical stiffeners, horizontal stiffeners, diagonal braces, an upper main beam, and an upper crossbar. The lower and upper main beams each have two sets. The lower crossbars are fixedly connected between the two ends of the lower main beams, and the upper crossbars are fixedly connected between the upper main beams. The diagonal braces are fixedly connected between the lower and upper main beams and are arranged in an M-shape between the lower and upper main beams.

[0007] As a further embodiment of this utility model: two sets of vertical reinforcing ribs are fixedly connected between the lower crossbars, and horizontal reinforcing ribs are fixedly connected between the vertical reinforcing ribs.

[0008] As a further improvement of this utility model, the lower main beam, lower crossbar, vertical reinforcing rib, horizontal reinforcing rib, diagonal brace, upper main beam, and upper crossbar are all made of Q690 steel.

[0009] As a further embodiment of this utility model, the cross-sections of the lower main beam, lower crossbar, vertical reinforcing rib, horizontal reinforcing rib, upper main beam, and upper crossbar are I-shaped.

[0010] As a further improvement of this utility model, the cross-section of the diagonal brace is U-shaped.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The use of Q690 steel gives this steel truss high tensile strength and good fatigue resistance, while reducing the overall structural weight while ensuring load-bearing capacity, thus improving the structure's economy and safety. The I-shaped cross-section design provides the lower main beam, upper main beam, and cross members with excellent bending and shear resistance, enabling them to withstand significant bending and shear forces. In particular, the configuration of the lower cross members and vertical stiffeners enhances the truss's shear strength. The M-shaped diagonal bracing design ensures more even stress distribution between the upper and lower main beams, effectively distributing the load, reducing localized stress concentration, improving the overall stiffness and stability of the truss, and minimizing micro-deflection. When external loads are applied to the truss, the lower and upper main beams share and transfer the load through the lower and upper crossbars and diagonal braces. The M-shaped arrangement of the diagonal braces effectively transfers the load from the upper and lower main beams to the lower crossbars and vertical stiffeners, forming a stable force network. The upper and lower main beams, lower and upper crossbars, and diagonal braces work together to bear the external load, forming a reasonable mechanical equilibrium structure. The connection between the lower and upper main beams ensures the uniform distribution of the load. The load is transferred to the diagonal braces and lower main beams through the upper main beams, and finally to the foundation through the lower crossbars, vertical stiffeners, and horizontal stiffeners, forming a stable force chain. Through a reasonable structural layout and the application of high-strength materials, the deflection of the truss is kept within a small range under heavy load conditions, improving the structural performance and structural strength. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a lightweight, heavy-duty steel truss beam with low deflection.

[0014] Figure 2 This is a schematic diagram of the planar structure at the stiffener in a lightweight, heavy-duty steel truss with low deflection.

[0015] Figure 3 This is a side view of a planar structure of a lightweight, heavy-duty steel truss with low deflection.

[0016] In the diagram: 1. Lower main beam; 2. Lower horizontal bar; 3. Vertical stiffener; 4. Horizontal stiffener; 5. Diagonal brace; 6. Upper main beam; 7. Upper horizontal bar. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0018] Reference Figure 1-3This embodiment provides a low-deflection lightweight heavy-duty steel truss girder, including a lower main beam 1, lower horizontal bars 2, vertical stiffeners 3, horizontal stiffeners 4, diagonal braces 5, an upper main beam 6, and upper horizontal bars 7. Both the lower main beam 1 and the upper main beam 6 have two sets of lower horizontal bars 2. Lower horizontal bars 2 are fixedly connected between the two ends of the lower main beam 1. Evenly distributed upper horizontal bars 7 are fixedly connected between the upper main beams 6. Evenly distributed diagonal braces 5 are fixedly connected between the lower main beam 1 and the upper main beam 6, and the diagonal braces 5 are arranged in an M-shape between the lower main beam 1 and the upper main beam 6. Two sets of vertical stiffeners 3 are fixedly connected between the lower horizontal bars 2. The structure is fixedly connected by evenly distributed horizontal stiffeners 4. The lower main beam 1, lower horizontal member 2, vertical stiffeners 3, horizontal stiffeners 4, diagonal brace 5, upper main beam 6, and upper horizontal member 7 are all made of Q690 steel. The lower main beam 1, lower horizontal member 2, vertical stiffeners 3, horizontal stiffeners 4, upper main beam 6, and upper horizontal member 7 have I-shaped cross-sections, while the diagonal brace 5 has a U-shaped cross-section. The use of Q690 steel gives the steel truss high tensile strength and good fatigue resistance, while also reducing the overall structural weight while ensuring load-bearing capacity, thus improving the structure's economy and safety. The I-shaped cross-section design endows the lower main beam 1, upper main beam 6, and crossbars with excellent bending and shear resistance, enabling them to withstand significant bending and shear forces. In particular, the configuration of the lower crossbar 2 and vertical stiffeners 3 enhances the shear strength of the truss. The design of the M-shaped diagonal brace 5 ensures more even stress distribution between the upper and lower main beams 1, effectively distributing the load, reducing local stress concentration, improving the overall stiffness and stability of the truss, and reducing micro-deflection. When external loads are applied to the truss, the lower main beam 1 and upper main beam 6 share the load through the lower crossbar 2, upper crossbar 7, and diagonal brace 5. The M-shaped arrangement of the diagonal braces 5 effectively transfers the load from the upper and lower main beams 1 to the lower horizontal bar 2 and vertical stiffeners 3, forming a stable force network. The upper main beam 6, lower main beam 1, lower horizontal bar 2, upper horizontal bar 7, and diagonal braces 5 jointly bear the external load, forming a reasonable mechanical equilibrium structure. The connection between the lower main beam 1 and the upper main beam 6 ensures the uniform distribution of the upper and lower loads. The load is transferred to the diagonal braces 5 and lower main beam 1 through the upper main beam 6, and finally transferred to the foundation through the lower horizontal bar 2, vertical stiffeners 3, and horizontal stiffeners 4, forming a stable force chain. Through reasonable structural layout and the application of high-strength materials, the deflection of the truss beam is kept within a small range under heavy load conditions, improving the serviceability and structural strength of the structure.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0020] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-deflection lightweight heavy-duty steel truss girder, characterized in that, It includes a lower main beam (1), a lower crossbar (2), a vertical reinforcing bar (3), a horizontal reinforcing bar (4), a diagonal brace (5), an upper main beam (6), and an upper crossbar (7). The lower main beam (1) and the upper main beam (6) each have two sets. The lower crossbar (2) is fixedly connected between the two ends of the lower main beam (1). The upper crossbar (7) is fixedly connected between the upper main beams (6). The diagonal brace (5) is fixedly connected between the lower main beam (1) and the upper main beam (6). The diagonal brace (5) is arranged in an M-shape between the lower main beam (1) and the upper main beam (6).

2. The micro-deflection lightweight heavy-duty steel truss girder according to claim 1, characterized in that, Two sets of vertical reinforcing ribs (3) are fixedly connected between the lower crossbars (2), and horizontal reinforcing ribs (4) are fixedly connected between the vertical reinforcing ribs (3).

3. The micro-deflection lightweight heavy-duty steel truss girder according to claim 1, characterized in that, The lower main beam (1), lower crossbar (2), vertical reinforcing bar (3), horizontal reinforcing bar (4), diagonal brace (5), upper main beam (6) and upper crossbar (7) are all made of Q690 steel.

4. The micro-deflection lightweight heavy-duty steel truss girder according to claim 1, characterized in that, The cross-sections of the lower main beam (1), lower horizontal bar (2), vertical reinforcing bar (3), horizontal reinforcing bar (4), upper main beam (6), and upper horizontal bar (7) are I-shaped.

5. A micro-deflection lightweight heavy-duty steel truss girder according to claim 1, characterized in that, The cross-section of the diagonal brace (5) is U-shaped.

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