Flexible diagonal web member space truss

Abstract

The invention belongs to the technical field of trusses, and particularly relates to a flexible diagonal web member space truss. The truss comprises a chord member, and the chord member comprises an upper chord member and a lower chord member which are arranged in parallel; the two ends of the vertical web member are vertically and fixedly connected with the upper chord member and the lower chord member respectively; the diagonal web members are obliquely arranged between the vertical web members, and the two ends of the diagonal web members are connected with the joints of the chord members and the vertical web members respectively. According to the truss provided by the invention, diagonal web members in a traditional space truss structure are replaced by the steel pull rods or the inhaul cables, so that the self weight of the structure is obviously reduced. The steel pull rods or the inhaul cables are adopted as the flexible diagonal web members, so that the flexible diagonal web members only bear axial tension, the cross section size of the members is reduced, the self weight of the structure is reduced, and the basic load of a building is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of trusses, and in particular relates to a flexible diagonal web space truss. Background Art

[0002] In large-span industrial and civil steel structures, common structural systems include trusses, grids, lattice shells, arches and cable structures, which are widely used in occasions that need to bear large span loads. As the main bending member, the truss structure is usually composed of chords and webs. The webs are mostly made of solid-web steel, such as H-shaped steel, rectangular tubes or round tubes, which can withstand axial tension and pressure. However, in the prior art, the traditional truss structure has the following major problems: First, the solid-web steel has a large deadweight and a high steel consumption, which makes the entire structure relatively heavy, especially in large-span buildings. This problem is more prominent; secondly, due to the large cross-sectional size of the steel, the traditional truss structure is difficult to meet the architects' demand for the slender and lightweight appearance of modern buildings, affecting the aesthetics of the building; finally, although flexible components such as steel cables have been used in truss structures, their application range is limited and they have not been fully combined with typical spatial truss structures, limiting their potential in reducing deadweight and optimizing structural design. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a flexible diagonal web space truss.

[0004] In the first aspect, a truss adopts the following technical solution:

[0005] A truss, comprising:

[0006] A chord bar, the chord bar comprising an upper chord bar and a lower chord bar arranged parallel to each other;

[0007] A vertical web member, two ends of which are respectively and vertically fixedly connected to the upper chord and the lower chord;

[0008] The diagonal web member is obliquely arranged between the vertical web members, and two ends of the diagonal web member are respectively connected to the connection between the chord member and the vertical web member.

[0009] Furthermore, the truss also includes an upper straight web member, a roof beam and a lower straight web member; the upper straight web member is laterally and vertically fixedly connected to the upper chord member; the two ends of the roof beam are respectively connected to the upper straight web member between two frames; the lower straight web member in a single frame is vertically and fixedly connected to the lower chord member.

[0010] Furthermore, the oblique web rod comprises an oblique web steel tie rod, and the oblique web steel tie rod comprises a rod body and a U-shaped joint, the U-shaped joint is fixedly connected to both ends of the rod body, and a pin shaft hole is opened on the U-shaped joint.

[0011] Furthermore, the diagonal web rod also includes a cross-type diagonal web steel pull rod, which includes a rod body, a fork-shaped piece and a U-shaped joint; the fork-shaped piece is symmetrically provided with four connecting holes; one end of the rod body is connected to the connecting hole, and the other end is connected to the U-shaped joint; the pin shaft hole is opened on the U-shaped joint.

[0012] Furthermore, the chord is fixedly provided with a connecting ear piece near the vertical web member and the upper straight web member, the connecting ear piece is provided with a through hole, and the through hole and the pin shaft hole are fixedly connected via a pin shaft; a double-side ring plate is also provided between the connecting ear piece and the U-shaped joint.

[0013] Furthermore, the truss also includes side frames, and the side frames include side frame horizontal roof supports and horizontal roof supports between the two frames; the side frame horizontal roof supports are formed by the plane formed by the upper chord and the upper straight web, and the horizontal roof supports between the two frames are formed by the plane formed by the upper chord, the roof beam and the upper straight web between the two frames; the cross-type diagonal steel tie rods are arranged inside the side frames.

[0014] In the second aspect, a flexible diagonal web space truss adopts the following technical solution:

[0015] A flexible diagonal web space truss comprises the truss described in any one of the above items and a supporting structure, wherein the supporting structure is fixedly arranged below the truss and is used to support the truss.

[0016] Furthermore, the supporting structure includes a first supporting structure and a second supporting structure, the first supporting structure is arranged at two ends of the truss, and the second supporting structure is arranged in the middle of the truss.

[0017] Furthermore, the first supporting structure comprises a first structural column, a first structural column foot and a hinge shaft, and the first structural column and the first structural column foot are flexibly connected via the hinge shaft;

[0018] The second supporting structure includes a second structural column, a second structural column foot and a rigid connection member, and the second structural column and the second structural column foot are rigidly connected via the rigid connection member.

[0019] Furthermore, the second structural columns are fixedly provided with connecting plates, transverse support rods and oblique support rods are provided between the second structural columns, and both ends of the transverse support rods and the oblique support rods are respectively fixedly connected to the connecting plates.

[0020] Beneficial effects of the present invention:

[0021] The truss provided by the present invention significantly reduces the deadweight of the structure by replacing the diagonal web members that only bear tension in the traditional space truss structure with steel tie rods or cables. The steel tie rods or cables are used as flexible diagonal web members, which only bear axial tension, which not only reduces the cross-sectional size of the rods, but also reduces the deadweight of the structure, thereby reducing the foundation load of the building.

[0022] At the same time, the application of flexible diagonal braces greatly reduces the amount of steel used in the structure. Since the steel tie rods (cables) are made of high-strength steel, the required steel cross-sectional area is significantly reduced under the same internal force conditions, and the overall steel consumption is less compared to the traditional solid-web steel structure. This not only reduces material costs, but also improves resource utilization, which helps achieve the goal of energy conservation and emission reduction.

[0023] In addition, the use of flexible diagonal braces makes the building structure more slender and beautiful, which can meet the architects' requirements for lightweight and aesthetic modern buildings. This design not only improves the visual effect of the building, but also conforms to the development trend of green buildings, making a positive contribution to energy conservation and carbon reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an isometric drawing of two trusses;

[0025] Figure 2 This is a top view of two trusses;

[0026] Figure 3 This is the main view of the truss;

[0027] Figure 4 This is the side view of the truss;

[0028] Figure 5 This is the structural diagram of the oblique steel tie rod;

[0029] Figure 6 This is a structural diagram of a cross-type diagonal steel tie rod;

[0030] Figure 7 This is the installation structure diagram of the diagonal steel tie rod and the upper chord rod;

[0031] Figure 8 This is the installation structure diagram of the diagonal steel tie rod and the lower chord;

[0032] Fig. 9 This is the installation structure diagram of the diagonal steel tie rod and the upper chord rod of the side beam horizontal roof support;

[0033] Fig.10 This is the isometric drawing of the flexible diagonal web space truss;

[0034] Fig.11 This is the main view of the flexible diagonal web space truss;

[0035] Fig.12is a structural diagram of the first supporting structure;

[0036] Fig.13 is a structural diagram of the second supporting structure;

[0037] Fig.14 This is the structural diagram of the second structural column support.

[0038] Figure numerals: 1, truss; 10, chord; 11, upper chord; 12, lower chord; 13, connecting ear piece; 131, double-side ring plate; 132, through hole; 133, pin; 20, vertical web member; 30, diagonal web member; 31, diagonal web steel tie rod; 32, cross-type diagonal web steel tie rod; 311, rod body; 312, U-shaped joint; 313, pin hole; 321, fork-shaped member; 40, upper straight web member; 50, roof beam; 60, lower straight web member; 70, side beam; 71 , horizontal roof support of side beams; 72, horizontal roof support between two beams; 2, spatial truss structure; 80, supporting structure; 81, first supporting structure; 82, second supporting structure; 811, first structural column; 812, first structural column foot; 813, hinge member; 821, second structural column; 822, second structural column foot; 823, rigid connector; 824, second structural column support; 8241, transverse support rod; 8242, oblique support rod; 8243, connecting plate. DETAILED DESCRIPTION

[0039] The following is a further specific description of a flexible diagonal web space truss described in the present invention in conjunction with an embodiment. For the sake of simplicity of description, this document cannot list all the alternative technical features and implementation schemes included in the present invention. Therefore, those skilled in the art should know that any technical features and implementation schemes in this embodiment do not limit the scope of protection of the present invention, which includes any alternative technical features and implementation schemes adopted by all those skilled in the art without creative labor. Specifically, the implementation schemes obtained by replacing any technical feature in the present invention or combining any two or more technical features provided by the present invention should be within the scope of protection of the present invention.

[0040] like Figure 1 , 2 , 3. This embodiment provides a truss 1, including:

[0041] A chord bar 10, the chord bar 10 comprises an upper chord bar 11 and a lower chord bar 12 arranged parallel to each other;

[0042] A vertical web member 20, two ends of which are respectively vertically fixedly connected to the upper chord member 11 and the lower chord member 12;

[0043] The diagonal web member 30 is obliquely arranged between the vertical web members 20 , and two ends of the diagonal web member 30 are respectively connected to the connection between the chord member 10 and the vertical web member 20 .

[0044] As an improvement of the above solution, the number of chords of the truss can be three, four, five or more. Three chords can form a triangular truss, four chords can form a four-chord truss, and five or more chords can form a truss section with richer shapes. The arrangement of the chords of the truss in the section can be flexibly arranged. For example, a four-chord space truss can form a rectangular four-chord space truss, an inverted trapezoidal four-chord space truss, etc.

[0045] In a specific embodiment, the cross section of the truss is an inverted trapezoid, the four vertices of the inverted trapezoid are chords, the upper two are upper chords, the lower two are lower chords, and the waist is a vertical web member and a diagonal web member.

[0046] As a further improvement of the above scheme, the shape of the chord of the truss along the span direction of the truss can be flexibly adjusted, including the shapes of the upper chord and the lower chord and their relationship. The chord shape can be horizontal, double slope, curved, etc., and the chord relationship can be parallel or convergent, etc.

[0047] As a further improvement of the above solution, the diagonal web members in the truss can be steel rods, steel cables, or a combination of partially flexible diagonal web members and partially solid-web steel sections.

[0048] like Figure 4 In some embodiments, the truss 1 further comprises an upper straight web member 40, a roof beam 50 and a lower straight web member 60; the upper straight web member 40 is transversely and vertically fixedly connected to the upper chord member 11; the two ends of the roof beam 50 are respectively connected to the upper straight web member 40 between two frames; the lower straight web member 60 in a single frame is vertically and fixedly connected to the lower chord member 12.

[0049] In a specific embodiment, the two parallel sides are straight web members, the upper part is an upper straight web member, and the lower part is a lower straight web member. For the cross section of the truss at the structural column position, due to the requirements of the architectural shape, there is no upper straight web member, only a lower straight web member, and for the cross section of the truss at positions other than the structural column, there are both upper and lower straight web members.

[0050] like Figure 5 In some embodiments, the oblique web rod 30 includes an oblique web steel tie rod 31 , and the oblique web steel tie rod 31 includes a rod body 311 and a U-shaped joint 312 , and the U-shaped joint 312 is fixedly connected to both ends of the rod body 311 , and a pin hole 313 is opened on the U-shaped joint 312 .

[0051] When the structure is stressed, the inclined steel tie rod mainly bears the axial tension. The two ends of the tie rod are connected to other components through U-shaped joints, and the pins are inserted into the pin holes, so that the tie rod can effectively transmit the tension. Since the tie rod only bears tension and does not participate in bearing pressure, the risk of failure caused by compression is avoided.

[0052] When external load acts on the truss structure, the chord and web work together, and the diagonal steel tie rod transfers the load to the main structure. The U-joint design ensures the flexible connection between the tie rod and other parts of the structure, and the pin hole provides sufficient freedom to ensure safety and stability under tension.

[0053] like Figure 6 In some embodiments, the diagonal brace 30 further includes a cross-type diagonal brace steel tie rod 32, which includes a rod body 311, a fork-shaped piece 321 and a U-shaped joint 312; the fork-shaped piece 321 is symmetrically provided with four connecting holes; one end of the rod body 311 is connected to the connecting hole, and the other end is connected to the U-shaped joint 312; the U-shaped joint 312 is provided with a pin hole 313.

[0054] When the truss structure is subjected to stress, the cross-type diagonal steel tie rod bears the axial tension through its rod body and fork-shaped piece, and through the cross arrangement, it can resist the vertical shear force of the truss in two directions. For the truss shear force in one direction, the axial tension of the diagonal steel tie rod in the corresponding direction is borne, and the diagonal steel tie rod in the other direction is compressed and withdrawn from work. For the truss shear force in the opposite direction, the stress conditions of the above two diagonal steel tie rods are opposite. That is, the cross-type diagonal steel tie rod can always keep at least one diagonal steel tie rod under stress, and only bear axial tension.

[0055] When external force is applied to the truss structure, the rod body of the diagonal steel tie rod is connected to other components through a U-shaped joint, and the pin in the pin hole provides rotational freedom, ensuring that the tie rod can be flexibly adjusted in the direction of the external force. At the same time, the cross design of the fork-shaped piece enables the tie rod to withstand tension from different directions, thereby effectively resisting deformation and shear force of the structure in multiple directions, and adapting to complex and variable load conditions and structural internal force distribution.

[0056] like Figure 7 , 8 9. In some embodiments, the chord 10 is fixedly provided with a connecting ear piece 13 near the vertical web member 20 and the upper straight web member 40. The connecting ear piece 13 is provided with a through hole 132. The through hole 132 is fixedly connected to the pin hole 313 via a pin 133. A double-sided ring plate 131 is also provided between the connecting ear piece 13 and the U-shaped joint 312.

[0057] The chord is fixed by connecting ears near the vertical web and the upper straight web. The connecting ears are provided with through holes, which are connected to the pin holes on the U-joint through pins. The pins provide sufficient rotational freedom in these through holes, so that the components can maintain a flexible connection when subjected to force, and will not cause stress concentration or damage to the connection due to excessive rigidity.

[0058] The double-sided ring plate is set between the connecting ear and the U-shaped joint, which is used to further disperse the stress at the connection when the structure is stressed. This multi-level connection design ensures that the force between the chord and the web can be evenly distributed, improving the bearing capacity and safety of the node.

[0059] like Figure 2 In some embodiments, the truss 1 further includes a side frame 70, and the side frame 70 includes a side frame horizontal roof support 71 and a horizontal roof support 72 between the two frames; the side frame horizontal roof support 71 is a plane formed by the upper chord 11 and the upper straight web member 40, and the horizontal roof support 72 between the two frames is a plane formed by the upper chord 11 between the two frames, the roof beam 50 and the upper straight web member 40; a cross-type diagonal steel tie rod 32 is arranged inside the side frame 70.

[0060] The design of the side frame includes the side frame horizontal roof brace and the horizontal roof brace between the two frames. The side frame horizontal roof brace forms a plane through the upper chord and the upper straight web. This plane structure can provide the necessary lateral support, thereby enhancing the structure's ability to resist lateral forces. The horizontal roof brace between the two frames forms a plane through the upper chord, roof beam and upper straight web between the two frames, ensuring a stable connection between the trusses and further enhancing the lateral stiffness and integrity of the structure.

[0061] The cross-type diagonal steel tie rods arranged inside the side beams, connected by fork-shaped pieces and U-shaped joints, enable the trusses to more effectively resist shear forces from different directions, ensuring that under multiple load conditions, the structure can disperse the load and maintain stability, preventing local structures from becoming unstable or shearing failure due to excessive loads.

[0062] like Fig.10 This embodiment provides a flexible diagonal web space truss 2 , which includes a truss 1 and a support structure 80 . The support structure 80 is fixedly disposed below the truss 1 and is used to support the truss 1 .

[0063] like Fig.11 In some embodiments, the support structure 80 includes a first support structure 81 and a second support structure 82 , wherein the first support structure 81 is disposed at both ends of the truss 1 , and the second support structure 82 is disposed in the middle of the truss 1 .

[0064] The flexible diagonal web space truss works together through the combination of trusses and supporting structures. The first supporting structure is set at both ends of the truss, mainly bearing vertical loads and providing end constraints for the truss to prevent the ends from lateral displacement or tilting. The second supporting structure is located in the middle of the truss, mainly used to support the middle area of ​​the truss to ensure that there will be no excessive deflection or deformation in the middle of the truss under load.

[0065] Under the action of external loads (such as deadweight, wind load, etc.), the truss structure transfers the load to the supporting structure. The first supporting structure, as the end support of the truss, bears part of the vertical and horizontal forces, while the second supporting structure shares the middle load, further optimizing the force transmission path and ensuring the structural safety and stability of the truss in large-span situations.

[0066] like Fig.12 , 13 In some embodiments, the first supporting structure 81 includes a first structural column 811, a first structural column foot 812 and a hinge shaft 813, and the first structural column 812 and the first structural column foot 812 are flexibly connected via the hinge shaft 813;

[0067] The second supporting structure 82 includes a second structural column 821 , a second structural column foot 822 and a rigid connector 823 . The second structural column 821 and the second structural column foot 822 are rigidly connected via a rigid connector 824 .

[0068] The first supporting structure is composed of a first structural column, a first structural column foot and a hinge shaft, and adopts a fixed hinge connection method, that is, the column and the column foot are connected by a hinge shaft, allowing the column to rotate to a certain extent in the horizontal direction while still maintaining a certain degree of stability.

[0069] The second supporting structure is composed of a second structural column, a second structural column base and a rigid connector, and adopts a rigid connection method, that is, the column and the column base are directly connected by a rigid connector, and the column is not allowed to shift or rotate in the horizontal direction, providing stronger support and lateral force resistance.

[0070] The first supporting structure is mainly used to bear vertical loads and unidirectional horizontal loads in the rotation plane along the hinge axis, allowing the structure to undergo certain deformation under horizontal loads such as earthquakes, thereby improving the seismic performance of the structure.

[0071] The secondary supporting structure is mainly used to bear vertical loads and bidirectional horizontal loads, providing stronger support and lateral force resistance to ensure that the structure remains stable under horizontal loads such as earthquakes.

[0072] like Fig.14In some embodiments, the second structural column 821 is fixedly provided with a connecting plate 8243, a transverse support rod 8241 and an oblique support rod 8242 are provided between the second structural columns 821, and both ends of the transverse support rod 8241 and the oblique support rod 8242 are fixedly connected to the connecting plate 8243 respectively.

[0073] The connecting plate is fixedly arranged on the second structural column and serves as a connection node for the transverse support rods and the diagonal support rods, connecting the horizontal support rods into a whole to form a stable support system; the connecting plate can also transfer horizontal loads, transferring the load from the structural column to the transverse support rods and the diagonal support rods, and through them to the adjacent structural columns, thereby forming an overall lateral force resistance system.

[0074] The transverse support rod connects adjacent structural columns to form a horizontal support to resist horizontal loads, such as earthquakes or wind. The transverse support rod can be made of round tubes, square tubes or other steel sections. The appropriate cross-sectional form and material can be selected according to actual needs.

[0075] The oblique support rods connect adjacent structural columns to form oblique supports, which improve the overall rigidity of the structure and enhance the structure's ability to resist lateral forces. The setting of oblique support rods can optimize the force performance of the structure, reduce structural deformation, and improve the stability of the structure. The inclination angle of the oblique support rods can be adjusted according to actual needs to achieve the best force effect.

[0076] The second supporting structure forms a stable triangular supporting system through the coordinated action of the connecting plate, transverse supporting rods and oblique supporting rods, which effectively resists the horizontal load, improves the overall rigidity of the structure, and enhances the structure's ability to resist lateral forces.

[0077] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived from them are still within the scope of protection of the claims of the invention.

Claims

1. A truss, characterized in that: include: A chord bar, the chord bar comprising an upper chord bar and a lower chord bar arranged parallel to each other; A vertical web member, two ends of which are respectively and vertically fixedly connected to the upper chord and the lower chord; The diagonal web member is obliquely arranged between the vertical web members, and two ends of the diagonal web member are respectively connected to the connection between the chord member and the vertical web member.

2. A truss according to claim 1, characterized in that: The truss also includes an upper straight web member, a roof beam and a lower straight web member; the upper straight web member is laterally and vertically fixedly connected to the upper chord member; the two ends of the roof beam are respectively connected to the upper straight web member between two frames; the lower straight web member in a single frame is vertically and fixedly connected to the lower chord member.

3. A truss according to claim 2, characterized in that: The oblique web rod comprises an oblique web steel tie rod, and the oblique web steel tie rod comprises a rod body and a U-shaped joint, the U-shaped joint is fixedly connected to two ends of the rod body, and a pin shaft hole is opened on the U-shaped joint.

4. A truss according to claim 3, characterized in that: The diagonal web rod also includes a cross-type diagonal web steel pull rod, which includes a rod body, a fork-shaped piece and a U-shaped joint; the fork-shaped piece is symmetrically provided with four connecting holes; one end of the rod body is connected to the connecting hole, and the other end is connected to the U-shaped joint; the pin shaft hole is opened on the U-shaped joint.

5. A truss according to claim 4, characterized in that: The chord is fixedly provided with a connecting ear piece near the vertical web member and the upper straight web member. The connecting ear piece is provided with a through hole, and the through hole is fixedly connected to the pin shaft hole through a pin shaft; a double-side ring plate is also provided between the connecting ear piece and the U-shaped joint.

6. A truss according to claim 5, characterized in that: The truss also includes side frames, and the side frames include side frame horizontal roof supports and horizontal roof supports between the two frames; the side frame horizontal roof supports are formed by the plane of the upper chord and the upper straight web, and the horizontal roof supports between the two frames are formed by the plane of the upper chord, the roof beam and the upper straight web between the two frames; the cross-type diagonal steel tie rods are arranged inside the side frames.

7. A flexible diagonal web space truss, characterized in that: The flexible diagonal web space truss comprises the truss according to any one of claims 1 to 6 and a supporting structure, wherein the supporting structure is fixedly arranged below the truss, and the supporting structure is used to support the truss.

8. The flexible diagonal web space truss according to claim 7, characterized in that: The supporting structure includes a first supporting structure and a second supporting structure, wherein the first supporting structure is disposed at both ends of the truss, and the second supporting structure is disposed in the middle of the truss.

9. The flexible diagonal web space truss according to claim 8, characterized in that: The first supporting structure comprises a first structural column, a first structural column foot and a hinge shaft, and the first structural column and the first structural column foot are connected by the hinge shaft; The second supporting structure includes a second structural column, a second structural column foot and a rigid connection member, and the second structural column and the second structural column foot are rigidly connected via the rigid connection member.

10. The flexible diagonal web space truss according to claim 9, characterized in that: The second structural columns are fixedly provided with connecting plates, and transverse supporting rods and oblique supporting rods are provided between the second structural columns. Both ends of the transverse supporting rods and the oblique supporting rods are respectively fixedly connected to the connecting plates.

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