Steel structure roof truss

Abstract

The utility model discloses a steel structure roof truss, and relates to the technical field of large-span steel structures. The steel structure roof truss comprises supporting columns, a plurality of steel roof truss upper chords, supporting rods and inhaul cable systems. The two ends of the steel roof truss upper chords are fixed to the supporting columns on the two sides correspondingly, and the multiple steel roof truss upper chords are arranged at intervals. The middle portions of the two sides of the upper chord of the steel roof truss are each provided with a supporting rod, and the supporting rods extend inwards. The inhaul cable system is installed between the supporting rod and the steel roof truss upper chord. The structure and the construction method of the steel structure roof truss are improved, the construction procedures are simplified, the construction measures are reduced, the construction efficiency is greatly improved, and the project construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of long-span steel structures, in particular to a steel roof truss. Background Art

[0002] At present, the application of long-span steel structures in the construction field is increasing. With the requirement for the beauty of building shapes, the dependence of special-shaped buildings on steel structures has gradually become prominent. However, with the increase in the span of steel structures, the self-weight of the structure itself also increases, making it difficult to meet the construction difficulty and cost requirements.

[0003] In the prior art, usually, a steel roof truss is directly welded to the columns of a long-span steel structure building, and multiple support steel columns are arranged below the middle of the roof truss to meet the force requirements. However, this requires a large amount of steel, resulting in a high project cost, and the steel columns occupy a certain space. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a steel roof truss, aiming to reduce the project cost of long-span steel structure buildings and reduce the space occupied by the steel structure itself.

[0005] To achieve the above purpose, the utility model provides a steel roof truss, including:

[0006] Support columns;

[0007] Multiple upper chords of the steel roof truss, both ends of the upper chord of the steel roof truss are respectively fixed on the support columns on both sides, and multiple upper chords of the steel roof truss are arranged at intervals;

[0008] Struts, one strut is respectively installed in the middle of both sides of the upper chord of the steel roof truss, and the strut extends inwards; and

[0009] A cable system installed between the strut and the upper chord of the steel roof truss.

[0010] Optionally, the cable system includes a first main cable, a second main cable and an auxiliary cable. The auxiliary cables are installed between the ends of the two struts and the top of the upper chord of the steel roof truss. The first main cable is installed between the ends of the two struts, and the second main cables are respectively installed between the ends of the two struts and the two side ends of the upper chord of the steel roof truss.

[0011] Optionally, the steel roof truss further includes secondary beams, and the secondary beams are installed on both upper chords of the steel roof truss.

[0012] Optionally, a bending and pressing member is installed between each secondary beam and the upper chord of the steel roof truss.

[0013] Optionally, the cable system, the upper chord of the steel roof truss and the strut form multiple triangular structures.

[0014] Optionally, the upper chord of the steel roof truss is in a "V" shape.

[0015] Optionally, the strut is hinged to the inner side of the upper chord of the steel roof truss.

[0016] Optionally, the other end of the strut installs the cable system through a cable clamp.

[0017] Optionally, supports are provided at both ends of the upper chord of the steel roof truss, and the supports are fixed on the support columns.

[0018] Optionally, the support and the support column are fixed by welding.

[0019] In the technical solution of the present utility model, the steel structure roof truss includes support columns, multiple upper chords of steel roof trusses, struts, and a cable system; both ends of the upper chord of the steel roof truss are respectively fixed to the support columns on both sides, and multiple upper chords of steel roof trusses are arranged at intervals; one strut is installed in the middle of each side of the upper chord of the steel roof truss, and the struts extend inward; the cable system is installed between the struts and the upper chord of the steel roof truss. It can be understood that by fixing both ends of the upper chord of the steel roof truss to the support columns on both sides respectively, arranging multiple upper chords of steel roof trusses at intervals, installing one strut in the middle of each side of the upper chord of the steel roof truss, and the struts extending inward, and installing the cable system between the struts and the upper chord of the steel roof truss, the present utility model realizes the adjustment of prestress and the shape of the roof truss, meets the bearing capacity requirements of the long-span steel structure roof truss, reduces the self-weight of the structure; reduces the number of support columns, only the support columns around the house need to be set, reduces the project cost of the long-span steel structure building, and reduces the space occupied by the steel structure itself. In addition, the upper chord of the steel roof truss and the like can be assembled on the ground and then transported to the air for welding by means of hoisting and the like. There is less operation in the air, the construction difficulty is reduced, the construction efficiency is greatly improved, the project duration is shortened, and the project cost is saved. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic structural diagram of the upper chord of the steel roof truss in an embodiment of the steel structure roof truss of the present utility model;

[0022] Figure 2 It is a construction schematic diagram in an embodiment of the steel structure roof truss of the present utility model Figure 1 ;

[0023] Figure 3Construction schematic diagram of an embodiment of the steel structure roof truss of the present utility model Figure 2 ;

[0024] Figure 4 Construction schematic diagram of an embodiment of the steel structure roof truss of the present utility model Figure 3 ;

[0025] Figure 5 Construction schematic diagram of an embodiment of the steel structure roof truss of the present utility model Figure 4 .

[0026] Explanation of the reference numerals in the attached drawings:

[0027] 10, support column; 20, upper chord of the steel roof truss; 30, strut; 40, cable system; 41, first main cable; 42, second main cable; 43, auxiliary cable.

[0028] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The present utility model provides a long-span steel structure roof truss.

[0034] In an embodiment of the present utility model, referring to Figures 1 to 5 , the steel structure roof truss includes support columns 10, multiple upper chords 20 of steel roof trusses, struts 30, and a cable system 40; both ends of the upper chords 20 of the steel roof trusses are respectively fixed on the support columns 10 on both sides, and the multiple upper chords 20 of the steel roof trusses are arranged at intervals; one strut 30 is respectively installed in the middle of both sides of the upper chords 20 of the steel roof trusses, and the struts 30 extend inwards; the cable system 40 is installed between the struts 30 and the upper chords 20 of the steel roof trusses.

[0035] In this embodiment, the cable system 40 includes multiple cables, and no specific limitation is made here.

[0036] It can be understood that in the present utility model, by respectively fixing both ends of the upper chords 20 of the steel roof trusses on the support columns 10 on both sides, arranging the multiple upper chords 20 of the steel roof trusses at intervals, respectively installing one strut 30 in the middle of both sides of the upper chords 20 of the steel roof trusses, and the struts 30 extending inwards, and installing the cable system 40 between the struts 30 and the upper chords 20 of the steel roof trusses, the adjustment of prestress and the shape of the roof truss are realized, meeting the bearing capacity requirements of the long-span steel structure roof truss, reducing the self-weight of the structure; and reducing the number of support columns 10, only the support columns 10 around the building need to be set, reducing the project cost of the long-span steel structure building and reducing the space occupied by the steel structure itself. In addition, the upper chords 20 of the steel roof trusses, etc. can be assembled on the ground and then transported to the air for welding by means of hoisting, etc. The operation in the air is less, the construction difficulty is reduced, the construction efficiency is greatly improved, the project duration is shortened, and the project cost is saved.

[0037] To further meet the bearing capacity requirements of a larger-span steel structure and reduce the self-weight of the structure, in an embodiment, referring to Figures 2 to 5, the cable system 40 may include a first main cable 41, a second main cable 42, and auxiliary cables 43. Auxiliary cables 43 are installed between the ends of the two struts 30 and the top of the upper chord 20 of the steel roof truss. The first main cable 41 is installed between the ends of the two struts 30, and the second main cables 42 are respectively installed between the ends of the two struts 30 and the two side ends of the upper chord 20 of the steel roof truss. Among them, the steel roof truss further includes secondary beams, and secondary beams are installed on both upper chords 20 of the steel roof truss; bending members are installed between each secondary beam and the upper chord 20 of the steel roof truss.

[0038] During installation, the other end of the strut 30 can install the cable system 40 through a cable clamp. The strut 30 can be hinged to the inner side of the upper chord 20 of the steel roof truss, so that the overall structure has a stronger bearing capacity for wind, earthquake, etc.

[0039] Preferably, as Figure 5 shown, the cable system 40, the upper chord 20 of the steel roof truss, and the strut 30 form multiple triangular structures. With such an arrangement, the force of the overall structure can be more stable.

[0040] In this embodiment, the upper chord 20 of the steel roof truss can be in a "V" shape, so that the forces on both sides of the steel structure are more balanced.

[0041] To ensure that the cable-stayed beam steel structure can be in an accurate position after tensioning, so as to further improve the overall stability of the long-span steel structure, as Figures 2 to 5 shown, in one embodiment, supports are provided at both ends of the upper chord 20 of the steel roof truss. The supports are fixed on the support columns 10, and the supports and the support columns 10 are fixed by welding.

[0042] In this embodiment, the two end supports of the cable-stayed beam steel structure are welded after tensioning, which can ensure that after tensioning, the roof truss can be accurately placed at the center of the support for welding and fixing. During the assembly of each cable-stayed beam, tension displacement compensation can be carried out. For example, if the theoretical distance between the support centers is L, then the actual distance between the support centers during actual assembly is the sum of L and the displacement compensation value. In this way, after tensioning, the actual distance between the supports can return to L. After confirming that the tension force of the cable is correct, the supports are welded, and other cable-stayed beams also need to be carried out accordingly.

[0043] As Figures 1 to 5 shown, during construction, the following steps can be carried out: Assemble multiple upper chords 20 of the steel roof truss on the ground according to the construction drawing dimensions; successively hoist multiple upper chords 20 of the steel roof truss above the top of the support columns 10, and install the two ends of the upper chord 20 of the steel roof truss on the support columns 10 on both sides respectively; install secondary beams between the two upper chords 20 of the steel roof truss, and install bending members between each secondary beam and the upper chord 20 of the steel roof truss; install a strut 30 extending inward at the middle part of both sides of the upper chord 20 of the steel roof truss; install the cable system 40 between the strut 30 and the upper chord 20 of the steel roof truss to form a cable-stayed beam steel structure; adjust the force and shape of the cable-stayed beam steel structure.

[0044] Specifically, the ground can be first laid out and assembled with erection jigs according to the construction plan, and the upper chord steel roof truss can be assembled according to the dimensions of the construction drawing; then, a 130t crawler crane can be used to hoist the upper chord steel roof truss, weld one end of the roof truss, then install the next roof truss, and then install the secondary beams between two roof trusses, and the tensioned beam upper chord bending members can be sequentially installed and completed; after the framework of the tensioned beam steel structure is assembled, the cable system 40 can be installed in the air; finally, the tensioned beam steel structure can be tensioned.

[0045] It should be noted that the cable tensioning includes two parts: force and shape. The force includes cable force, internal force of key steel structures, and support reaction force, etc.; the shape includes: span, rise, and spatial attitude of key components. The tensioning mainly controls the cable tension and the vertical displacement at the mid-span of the upper chord members.

[0046] It can be understood that by adopting the above construction method, the aerial construction time is greatly reduced, the construction process is simplified, the construction measures are reduced, the construction difficulty is low, the construction efficiency is greatly improved, the project duration is shortened, and the project cost is greatly saved.

[0047] Refer to Figures 1 to 5 , when installing the cable system 40, auxiliary cables 43 can be first installed between the ends of the two struts 30 and the top of the upper chord 20 of the steel roof truss respectively; then, the first main cable 41 can be installed between the ends of the two struts 30; subsequently, the second main cables 42 can be installed between the ends of the two struts 30 and the two side ends of the upper chord 20 of the steel roof truss respectively.

[0048] During construction, a 25t truck crane and a cigarette machine can be used to assist in cable deployment.

[0049] Furthermore, when adjusting the force and shape of the tensioned beam steel structure, tensioning tools can be first installed on the outer sides of the two second main cables 42; then, the cable system 40 can be tensioned.

[0050] Among them, in the step of tensioning the cable system 40, tensioning is carried out synchronously at both ends of the tensioned beam steel structure and hierarchical tensioning is adopted.

[0051] In this embodiment, the hierarchical tensioning is divided into primary tensioning, secondary tensioning, and tertiary tensioning. The primary tensioning is 75% of the design value, the secondary tensioning is 100% of the design value, and the tertiary tensioning is 105% of the design value.

[0052] During installation, the two auxiliary cables 43 at the upper part of the cable system are first installed, and then the lower main cables are installed. When installing the main cables, the first main cable 41 is installed first and then the second main cables 42 on both sides. After all the cables are installed, cable tensioning is carried out.

[0053] The cable tensioning control includes two parts: force and shape. The force includes cable force, internal force of key steel structures, and support reaction force, etc.; the shape includes: span, rise, and spatial attitude of key components. In this embodiment, the two ends of the beam string structure are tensioned synchronously, and the step-by-step tensioning method is adopted: pre-tightening → 75% → 100% → 105%.

[0054] Furthermore, after adjusting the force and shape of the beam string structure steel, the tension displacement compensation value of each beam string structure steel can be determined according to the relationship table between the tension value and the sliding amount of the tension support and the theoretical distance between the support centers; then, the distance between the support centers of each beam string structure steel is compensated according to the corresponding tension displacement compensation value; finally, the supports of each beam string structure steel are welded and fixed.

[0055] Taking the actual application scenario as an example, a total of 14 beam string structures in the ice hockey arena and the basketball arena need to be tensioned, and the sequence is to tension from axis 3 to axis 16 in turn. The detailed tensioning sequence and other comparison data are as follows:

[0056] Comparison Table of Tensioning Data for Ice Hockey Arena and Basketball Arena

[0057]

[0058] Among them, ZXL is the abbreviation of the first letters of the Chinese pinyin of the beam string structure.

[0059] In this project, the two supports at both ends of the beam string structure are welded after tensioning. To ensure that the beam string structure can be accurately placed at the support center for welding and fixing after tensioning, the tension displacement compensation needs to be carried out according to the tension support sliding amount data in the above table during the assembly of each beam string structure. For example, if the theoretical distance between the support centers of the ZXL01 support is L, according to the data in the above table, the actual distance between the support centers during assembly is L + 74 mm. After tensioning, the distance between the supports returns to L, and the tension cable force at this time is checked. After confirmation, the welding of the beam string structure support is carried out, and the same method is applied to other beam string structures.

[0060] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A steel structure roof truss, characterized in that: include: Support columns; Multiple steel roof truss upper chords, two ends of the steel roof truss upper chords are respectively fixed to the support columns on both sides, and the multiple steel roof truss upper chords are arranged at intervals; A support rod, one of which is installed at the middle of both sides of the upper chord of the steel roof truss, and the support rod extends inwards; as well as A cable system is installed between the support rod and the upper chord of the steel roof frame.

2. The steel structure roof truss according to claim 1, characterized in that: The cable system includes a first main cable, a second main cable and an auxiliary cable. The auxiliary cables are installed between the ends of the two struts and the top of the upper chord of the steel roof truss. The first main cable is installed between the ends of the two struts, and the second main cables are respectively installed between the ends of the two struts and the two side ends of the upper chord of the steel roof truss.

3. The steel structure roof truss according to claim 1, characterized in that: The steel structure roof truss also includes a secondary beam, and the secondary beam is installed on the upper chords of the two steel roof trusses.

4. The steel structure roof truss according to claim 3, characterized in that: Compression-bending members are installed between each of the secondary beams and the upper chord of the steel roof truss.

5. The steel structure roof truss according to claim 1, characterized in that: The cable system, the upper chord of the steel roof frame and the support rods form a plurality of triangular structures.

6. The steel structure roof truss according to claim 1, characterized in that: The upper chord of the steel roof frame is in a "human" shape.

7. The steel structure roof truss according to claim 1, characterized in that: The support rod is hinged on the inner side of the upper chord of the steel roof frame.

8. The steel structure roof truss according to claim 7, characterized in that: The other end of the support rod is provided with the cable system via a cable clamp.

9. The steel structure roof truss according to claim 1, characterized in that: Both ends of the upper chord of the steel roof truss are provided with supports, and the supports are fixed on the supporting columns.

10. The steel structure roof truss according to claim 9, characterized in that: The support and the support column are fixed by welding.

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