Large-span light truss roof structure

Abstract

The utility model provides a large-span light truss roof structure which comprises a truss structure and a roof panel erected on the truss structure, a roof panel transverse supporting rod is connected between the truss structure and the roof panel, and the truss structure comprises a herringbone truss with a first prestress assembly arranged on the lower portion. A plurality of groups of herringbone trusses are arranged in the longitudinal direction of the truss roof structure, and a plurality of groups of second prestress assemblies are arranged among the plurality of groups of herringbone trusses in a penetrating mode and are arranged on the plurality of groups of herringbone trusses in the transverse direction of the truss roof structure. On one hand, by means of the mode that low prestress is applied to the bottom of the herringbone truss through the first prestress assembly, tensile stress and compressive stress in profile steel of the herringbone truss are reduced, and therefore the anti-damage capacity of the herringbone truss is improved; on the other hand, the second prestress assemblies are arranged among the multiple sets of herringbone trusses in a penetrating mode, and the overall yield failure resistance of the herringbone trusses is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to large -scale civil engineering temporary factory roof construction technical field, concretely relates to a kind of large-span light truss roof structure. BACKGROUND

[0002] In the construction process of hydropower engineering or other large-scale civil engineering, temporary factory is usually built on the construction site. In order to save investment, most temporary factories use large-span roofs made of section steel to ensure that there is a spacious working space under the factory building. However, when the span of the truss roof exceeds the length of the section steel, the section steel needs to be spliced, and the splicing part often becomes a weak link of the structure. If not handled properly, it is easy to cause damage. In addition, for such temporary buildings, the construction party usually wants to design the truss relatively thin to further save investment and facilitate installation.

[0003] The damage of the truss mainly shows two forms: the first is the self-damage of the truss inside, which is usually caused by the insufficient tensile or shear strength of the anchoring part, or the insufficient yield resistance of the compression part, and rarely by the insufficient strength of the section steel itself. The second is the overall yield damage, which is usually caused by the excessive sparseness of the transverse connection or the insufficient yield resistance of the transverse connection. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a large-span light truss roof structure. The utility model reduces the tensile and compressive stress in the section steel of the herringbone truss by applying low prestress to the bottom of the herringbone truss through the first prestress assembly, thereby improving its own resistance to damage. On the other hand, the second prestress assembly is provided through the multiple herringbone trusses to improve its overall yield resistance.

[0005] The utility model embodiment provides a large-span light truss roof structure, which comprises a truss structure and a roof panel erected on the truss structure, a roof panel transverse support rod connected between the truss structure and the roof panel, the truss structure comprises a herringbone truss provided with a first prestress assembly at the bottom, the herringbone trusses are arranged in multiple groups along the longitudinal direction of the truss roof structure, a second prestress assembly is provided through the multiple herringbone trusses, the second prestress assembly is provided in multiple groups and arranged along the transverse direction of the truss roof structure on the multiple herringbone trusses.

[0006] In one embodiment, the first prestress assembly comprises a vertical support rod and a first prestress member, the two ends of the first prestress member are fixed to the two ends of the herringbone truss respectively, the first end of the vertical support rod is connected to the bottom of the herringbone truss, and the second end is connected to the first prestress member.

[0007] In an embodiment, a tension adjuster is arranged on the first prestressed member.

[0008] In an embodiment, a single vertical support rod is arranged, and the vertical support rod is arranged at a middle position of the herringbone truss.

[0009] In an embodiment, a plurality of vertical support rods are arranged, and a single vertical support rod is arranged at the middle position of the herringbone truss and symmetrically distributed to both sides from the middle, and the lengths of the plurality of vertical support rods gradually decrease from the middle to both sides.

[0010] In an embodiment, a plurality of vertical support rods are arranged, and the plurality of vertical support rods are symmetrically distributed to both sides from the middle as a symmetric point, and the lengths of the plurality of vertical support rods gradually decrease from the middle to both sides.

[0011] In an embodiment, the second prestressed assembly comprises a second prestressed member and a tubular member, the second prestressed member is arranged through a plurality of herringbone trusses, and the tubular member is sleeved between adjacent two herringbone trusses on the outer side of the second prestressed member, and both ends of the tubular member abut against adjacent herringbone trusses.

[0012] In an embodiment, an anchoring end and a locking structure are arranged at both ends of the second prestressed member.

[0013] In an embodiment, the herringbone truss comprises two herringbone arranged inclined support members at the upper part and a horizontal arranged bottom support member at the lower part, and a partition support member is connected between the two herringbone arranged inclined support members and the bottom support member.

[0014] In an embodiment, the partition support member comprises a plurality of vertical partition support members and a plurality of inclined partition support members, the plurality of vertical partition support members are arranged between the two herringbone arranged inclined support members and the bottom support member along the transverse direction of the truss roof structure, and the inclined partition support members are arranged between adjacent vertical partition support members.

[0015] The large-span light truss roof structure has the following advantages:

[0016] (1) The herringbone truss bottom is subjected to low prestress by the first prestressed assembly, so that the tensile stress and the compressive stress in the herringbone truss section steel are reduced, and the self damage resistance is improved; on the other hand, the second prestressed assembly is arranged through a plurality of herringbone trusses to improve the overall yield damage resistance. Under the same load condition, the amount of steel can be greatly reduced, which is not only economical, but also further reduces the dead load, and the benefit is remarkable.

[0017] (2) The common herringbone truss generates tensile stress in the bottom support member and compressive stress in the diagonal support member under the action of the truss self weight, roof and load, the first prestressed member of the herringbone truss of the utility model generates compressive stress in the bottom support member and tensile stress in the diagonal support member after prestress is applied, which can effectively balance the truss self weight, roof and load, reduce the tensile stress of the bottom support member and the compressive stress of the diagonal support member, and improve the bearing capacity.

[0018] (3) The first prestressed member forms a multi-segment broken line after tensioning, and the vertical support rod produces a jacking effect on the bottom support member, which reduces the span of the herringbone truss and further improves the bearing capacity of the truss.

[0019] (4) The existing truss roof structure is connected by welding or riveting between multiple groups of herringbone trusses, and when the truss appears yield deformation, one side is in tension and the other side is in compression, thereby improving the yield resistance. However, when the load is large, the tensile strength of the connection part on the tension side may be insufficient and damaged, and the compression side may be compressed too much and yield. The second prestressed member of the utility model generates compressive stress on the herringbone truss after prestress is applied, and the herringbone truss has higher stability under the pressure of the two tubular members on the top. The tubular member is limited by the second prestressed member along the path, which greatly improves the yield resistance.

[0020] (5) The longitudinal and transverse bidirectional prestressed assembly can be used alone or in combination. When used in combination, the entire roof is in a prestressed statically indeterminate state, which has very strong overload capacity. By setting a stress meter on the steel strand, the load-bearing state of the roof can be detected in time, further ensuring the safety of the roof. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Fig. 1 The structure schematic view of the herringbone truss provided by the embodiments of the utility model.

[0023] Fig. 2 The simplified view of the truss structure of the multiple groups of herringbone trusses provided by the embodiments of the utility model.

[0024] Fig. 3 The structure schematic view of the second prestressed assembly provided by the embodiments of the utility model.

[0025] Reference numerals: 1. Bottom support member; 2. Vertical partition support member; 3. Diagonal partition support member; 4. Diagonal support member; 5. Horizontal support rod for roof panel; 6. Roof panel; 7. First prestressed member; 8. Vertical support rod; 9. Tension adjuster; 10. Fixture; 11. Steel strand perforation; 12. Truss base; 13. Second prestressed member; 14. Anchoring end; 15. Tubular member; 16. Anchor plate; 17. Anchor cable clamp; 18. A-frame truss. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present utility model. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present utility model.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] like Figs. 1-3 As shown, a large-span lightweight truss roof structure includes a truss structure and a roof panel 6 erected on the truss structure. A transverse support rod 5 connects the truss structure and the roof panel 6. The truss structure includes a herringbone truss 18 with a first prestressed component at the bottom. Multiple sets of herringbone trusses 18 are arranged along the longitudinal direction of the truss roof structure. A second prestressed component is provided through the multiple sets of herringbone trusses 18. Multiple sets of the second prestressed component are provided and arranged along the transverse direction of the truss roof structure on the multiple sets of herringbone trusses 18.

[0029] In this embodiment, the transverse support rods 5 of the roof panel are installed along the entire length of the surfaces of the multiple sets of herringbone trusses 18 in the direction of their arrangement. Multiple transverse support rods 5 are provided and spaced apart along the transverse direction of the truss roof structure. The transverse support rods 5 of the roof panel can be made of I-beams.

[0030] The connection between the roof panel 6, the transverse support rod 5 of the roof panel and the herringbone truss 18 can be bolted or welded. Bolt anchoring is preferred because it is easier to remove and can reduce stress concentration at the joint when prestressing is applied.

[0031] The chevron truss 18 comprises two upper chevron arranged oblique support members 4 and a lower horizontal arranged bottom support member 1, and a partition support member is connected between the two upper chevron arranged oblique support members 4 and the bottom support member 1.

[0032] The partition support member comprises a plurality of vertical partition support members 2 and a plurality of oblique partition support members 3, the plurality of vertical partition support members 2 are arranged between the two upper chevron arranged oblique support members 4 and the bottom support member 1 along the transverse direction of the truss roof structure, and the oblique partition support members 3 are arranged between adjacent vertical partition support members 2.

[0033] In the embodiment, the bottom support member 1, the vertical partition support member 2, the oblique partition support member 3 and the oblique support member 4 can all be profiled steel. Specifically, the profiled steel can be selected from any one or a combination of I-beam, H-beam, channel steel, angle steel or square tube, and the material is preferably high-strength steel.

[0034] The first prestressed assembly comprises a vertical support rod 8 and a first prestressed member 7, the first prestressed member 7 can be a steel strand, and the two ends of the first prestressed member 7 are fixed to the two ends of the chevron truss 18, the first end of the vertical support rod 8 is connected to the bottom of the chevron truss 18, and the second end of the vertical support rod 8 is connected to the first prestressed member 7. Specifically, the connection part of the vertical support rod 8 and the first prestressed member 7 is arranged in a circular arc shape along the bending direction of the first prestressed member 7, the bottom of the vertical support rod 8 is provided with a limiting groove, and the first prestressed member 7 passes through the limiting groove and is connected to the first prestressed member 7.

[0035] In the embodiment, a fixing member 10 is arranged at both sides of the end of the bottom support member 1, and the fixing member 10 is a steel plate with a hole. The two ends of the first prestressed member 7 pass through the hole of the fixing member 10 and are fixedly connected to the fixing member 10. The corners around the hole of the fixing member 10 are polished into a circular arc shape to avoid cutting damage to the first prestressed member 7.

[0036] The first prestressed member 7 is provided with a tension adjuster 9, and the prestress of the first prestressed member 7 is realized by tensioning the tension adjuster 9 connected to the first prestressed member 7.

[0037] The vertical support rod 8 is arranged in a single rod, and the vertical support rod 8 is arranged at the middle position of the chevron truss 18. Specifically, a vertical support rod 8 is arranged at the middle of the bottom of the bottom support member 1, the first prestressed member 7 is connected to the vertical support rod 8 and is tensioned to form two broken lines, respectively generating compressive stress in the bottom support member 1 and tensile stress in the oblique support member 4, and an upward supporting force is formed on the vertical support rod 8.

[0038] The vertical support rods 8 are provided with an odd number of rods, wherein a single vertical support rod is arranged at the middle of the herringbone truss 18 and symmetrically distributed to both sides from the middle, and the length of the multiple vertical support rods gradually decreases from the middle to both sides. Specifically, a vertical support rod 8 is arranged at the middle, 1 / 3-1 / 4 and 2 / 3-3 / 4 of the bottom of the bottom support member 1, and the first prestressed member 7 is connected with the vertical support rod 8 and forms four broken lines after being tensioned, which respectively generates compressive stress in the bottom support member 1, tensile stress in the diagonal support member 4, and upward supporting force on the vertical support rod 8.

[0039] Further, the vertical support rods 8 can also be provided with an even number of rods, which are symmetrically distributed to both sides from the middle of the herringbone truss 18 as the symmetric point, and the length of the multiple vertical support rods gradually decreases from the middle to both sides.

[0040] In the embodiment, the truss base 12 is arranged at the both ends of the bottom support member 1, which is used for erection and connection with the lower column or beam body.

[0041] The second prestressed assembly includes a second prestressed member 13 and a tubular member 15, the second prestressed member 13 can adopt a steel strand, the second prestressed member 13 is arranged through multiple groups of herringbone trusses 18, and the outer side of the second prestressed member 13 is sleeved with the tubular member 15 between the adjacent two groups of herringbone trusses 18, and the both ends of the tubular member 15 respectively abut against the adjacent herringbone trusses 18.

[0042] In the embodiment, a group of second prestressed assemblies is arranged in the span of the truss roof structure, and multiple groups of second prestressed assemblies are symmetrically and spaced arranged on both sides. The second prestressed member 13 is connected with the vertical partition support member 2 of the herringbone truss 18.

[0043] Specifically, the vertical partition support member 2 is provided with a steel strand through hole 11 for the second prestressed member 13 to pass through. The steel strand through hole 11 is arranged at the middle position of the vertical partition support member 2. The diameter of the steel strand through hole 11 is greater than the diameter of the second prestressed member 13 and less than the inner diameter of the tubular member 15.

[0044] The tubular member 15 can adopt a thick-walled steel pipe, which is sleeved on the second prestressed member 13 and has an inner diameter slightly larger than the diameter of the second prestressed member 13.

[0045] The both ends of the second prestressed member 13 are respectively provided with an anchoring end 14 and a locking structure.

[0046] In the embodiment, the locking structure comprises an anchor pad 16 and an anchor cable clamp 17. After a plurality of herringbone trusses 18 are installed in place, the second prestressed member 13 and the tubular member 15 are inserted. The second prestressed member 13 is provided with an anchor end head 14 at one end and the anchor pad 16 and the anchor cable clamp 17 at the other end for locking. The steel strand prestress of the second prestressed member 13 is applied by a jack.

[0047] The embodiment also provides an implementation method of the large-span light truss roof structure, comprising any of the large-span light truss roof structures described above, and the implementation method comprises the following steps:

[0048] S1, manufacturing the herringbone truss 18, the base 12, the fixing member 10 and the lower vertical support rod 8;

[0049] S2, connecting the first prestressed member 7 with the tension adjuster 9, and fixing and connecting the two ends of the first prestressed member 7 with the fixing members 10 at the two ends of the herringbone truss 18 respectively, and inserting the first prestressed member 7 along the vertical support rod 8, and finally locking after locking and fixing the first prestressed member 7 with the vertical support rod 8 through the tension adjuster 9 and applying the designed tension to the first prestressed member 7;

[0050] S3, assembling a plurality of herringbone trusses 18 to build the skeleton of the truss structure and correct and position;

[0051] S4, inserting the second prestressed member 13 between a plurality of herringbone trusses 18, and sleeving the tubular member 15 between the adjacent two herringbone trusses 18 outside the second prestressed member 13, and preliminarily locking the two ends of the second prestressed member 13 by the anchor end head 14 and the locking structure respectively. The anchor pad 16 is inserted into the clamp 17 after being preliminarily locked by being pulled tight through one end of the second prestressed member 13;

[0052] S5, after installing the horizontal support rod 5, applying the prestress to the second prestressed member 13 by the prestress applying device, and finally locking through the locking structure;

[0053] S6, installing the roof panel 6.

[0054] According to the description and the drawings of the utility model, a person skilled in the art can easily manufacture or use the utility model of a large-span light truss roof structure, and the positive effects recorded in the utility model can be achieved.

[0055] Unless otherwise stated and limited, the terms "set", "connected", and "connection" in the present application should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] Unless otherwise stated and limited, the terms "set", "connected", and "connection" in the present application should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A large-span lightweight truss roof structure, characterized in that: It includes a truss structure and a roof panel erected on the truss structure. The truss structure and the roof panel are connected by transverse support rods. The truss structure includes a herringbone truss with a first prestressed component at the bottom. Multiple sets of herringbone trusses are arranged along the longitudinal direction of the truss roof structure. Second prestressed components are installed through the multiple sets of herringbone trusses. Multiple sets of second prestressed components are installed and arranged along the transverse direction of the truss roof structure on the multiple sets of herringbone trusses.

2. The large-span lightweight truss roof structure according to claim 1, characterized in that: The first prestressed component includes a vertical support rod and a first prestressed member. The two ends of the first prestressed member are respectively fixed to the two ends of the herringbone truss. The first end of the vertical support rod is connected to the bottom of the herringbone truss, and the second end is connected to the first prestressed member.

3. The large-span lightweight truss roof structure according to claim 2, characterized in that: A tension adjuster is provided on the first prestressed member.

4. The large-span lightweight truss roof structure according to claim 2, characterized in that: The vertical support rod is a single rod, which is located at the middle of the A-frame truss.

5. The large-span lightweight truss roof structure according to claim 2, characterized in that: The vertical support rods are provided in odd or multiple quantities. The single vertical support rod is set in the middle of the A-frame truss and is symmetrically distributed from the middle to both sides. The length of the multiple vertical support rods gradually decreases from the middle to both sides.

6. The large-span lightweight truss roof structure according to claim 2, characterized in that: The vertical support rods are provided in an even number, and are symmetrically distributed to both sides with the middle of the A-frame truss as the symmetrical point, and the length of the vertical support rods gradually decreases from the middle to both sides.

7. The large-span lightweight truss roof structure according to claim 1, characterized in that: The second prestressed component includes a second prestressed member and a tubular member. The second prestressed member is arranged through multiple sets of herringbone trusses, and the tubular member is sleeved on the outside of the second prestressed member between two adjacent sets of herringbone trusses. The two ends of the tubular member abut against the adjacent herringbone trusses respectively.

8. The large-span lightweight truss roof structure according to claim 7, characterized in that: Anchoring ends and locking structures are respectively provided at both ends of the second prestressed member.

9. The large-span lightweight truss roof structure according to claim 1, characterized in that: The herringbone truss includes two herringbone-shaped diagonal support members at the top and a horizontally arranged bottom support member at the bottom. A separating support member connects the two herringbone-shaped diagonal support members and the bottom support member.

10. The large-span lightweight truss roof structure according to claim 9, characterized in that: The partition support members include multiple vertical partition support members and multiple diagonal partition support members. The multiple vertical partition support members are arranged in the transverse direction of the truss roof structure between two diagonal support members arranged in a V-shape and the bottom support member. Diagonal partition support members are arranged between adjacent vertical partition support members.

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