Purline arrangement structure for reconstruction of grid roof

Abstract

The utility model relates to the technical field of steel structure reinforcement, in particular to a purline arrangement structure for grid roof reconstruction, which is characterized in that a bracket structure is arranged on an existing purline bracket, the bracket structure is provided with a connecting plate, and a connecting hole is formed in the connecting plate; the newly-added main purlin is supported on the connecting plate and is perpendicular to the existing purlin, and the newly-added main purlin and the connecting plate are in simple support connection through a connecting piece screwed into the connecting hole. The steel grid structure has the advantages that the bearing capacity of the steel grid structure is remarkably improved, and the design requirement of roof dead load is met; the structure is simple and reasonable, on-site installation is lossless and rapid, the newly-added main purlin can be stably installed, and the newly-added secondary purlin can be further installed; and the prefabricated degree is high, modular design can be conducted according to various working conditions, and the method is suitable for popularization.

Description

Technical Field

[0001] This utility model relates to the field of steel structure reinforcement technology, specifically to a purlin arrangement structure for the renovation of a space frame roof. Background Technology

[0002] The existing roofs of elevated rail transit stations are mostly steel space frame structures, with a roof dead load design limit of 0.2 to 0.3 kN / m. 2 This load includes all enclosure structures above the spherical nodes of the space frame, such as purlin supports, purlins, roof panels and their connectors.

[0003] Currently, purlins are installed at the ball joints along the longitudinal direction of existing elevated rail transit stations. A single layer of color-coated steel sheet is mounted on the purlins, and the actual roof dead load is 0.1 kN / m. 2 Left and right, meeting design requirements.

[0004] However, when renovating existing elevated rail transit stations, for example, replacing the roof panels with aluminum-magnesium-manganese panels according to renovation requirements, the self-weight of the roof panels is calculated to be between 0.25 and 0.30 kN / m based on the roof panel structure. 2 Around this time, there is a possibility that the existing space frame structure and purlins may lack sufficient strength or stability. Meanwhile, subway operations cannot be interrupted, and all construction must be completed within designated maintenance windows. However, the number of maintenance windows each week is limited, requiring close cooperation from multiple parties. Furthermore, after construction, the space frame must be covered to prevent any exposure that could affect operations. In addition, maintenance windows are all located in the early morning, subject to noise control requirements.

[0005] Therefore, how to solve the above problems is a technical problem that needs to be addressed by existing technologies. Summary of the Invention

[0006] The purpose of this utility model is to address the shortcomings of the existing technology by providing a purlin arrangement structure for the renovation of a space frame roof. By setting support structures at the locations of existing space frame ball joints to accommodate the installation of new main purlins, the new main purlins can be installed quickly and without damage. Furthermore, the installation of new main purlins increases the load-bearing capacity of the steel space frame roof structure, thereby meeting the renovation requirements.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A purlin arrangement structure for the renovation of a space frame roof is used to install new main purlins at the locations of existing purlins. The existing purlins are installed on the space frame ball joints with existing purlin supports. The structure is characterized by: a support structure provided on the existing purlin supports, the support structure having a connecting plate with a connecting hole, the new main purlin being supported on the connecting plate and arranged perpendicularly to the existing purlins, and the new main purlin and the connecting plate forming a simple support connection through a connector screwed into the connecting hole.

[0009] Several newly added main purlins are arranged in the vertical direction of the line, and new secondary purlins are arranged between adjacent new main purlins. The new secondary purlins are connected and fixed to the new main purlins.

[0010] The support structure includes two identical purlin brackets. The two purlin brackets are connected and fixed together by connectors to form a clamping space that matches the existing purlin bracket of the spherical node of the grid structure, so that the support structure clamps around the periphery of the existing purlin bracket. The connecting plate is set on the purlin bracket.

[0011] A shear stiffening rib extends between the purlin bracket and the connecting plate, and the shear stiffening rib is located below the connecting plate.

[0012] Each of the two purlin brackets has a wing plate, and each wing plate has a bolt fixing hole. The wing plates of the two purlin brackets are connected and fixed by screwing bolts into the bolt fixing holes.

[0013] Multiple bolt fixing holes are provided in the height direction of the wing plate.

[0014] The connecting plate has a plurality of connection holes.

[0015] The advantages of this utility model are: it significantly improves the load-bearing capacity of the steel space frame structure and meets the design requirements of roof dead load; the structure is simple and reasonable, and the on-site installation is non-destructive and quick, and it can stably install the new main purlins and further install the new secondary purlins; the degree of prefabrication is high, and it can be modularly designed for various working conditions, making it suitable for widespread application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the nodes of this utility model;

[0018] Figure 3 This is a schematic diagram of the support structure in this utility model. Detailed Implementation

[0019] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0020] like Figure 1-3 As shown in the figure, the numbers 1-13 represent: first purlin support 1, second purlin support 2, connecting plate 3, connecting hole 4, wing plate 5, bolt fixing hole 6, shear stiffening rib 7, existing purlin 8, space frame ball joint 9, support structure 10, existing purlin support 11, newly added main purlin 12, and newly added secondary purlin 13.

[0021] Example: Figure 2 or Figure 3 As shown, the purlin arrangement structure for the space frame roof renovation in this embodiment is used to improve the load-bearing capacity when the load-bearing capacity of the existing purlins 8 does not meet the design requirements for the dead load above. This is achieved by adding a new main purlin 12 at the existing purlin 13, or by further adding a new secondary purlin 13 on top of the new main purlin 12. The existing purlins 8 are supported by existing purlin supports 11 below, and these existing purlin supports 11 are equipped with space frame ball joints 9 for connecting the nodes of the steel space frame structure.

[0022] Combination Figure 2 and Figure 3 As shown, a support structure 10 is provided at the existing purlin bracket 11. The support structure 10 includes a first purlin bracket 1 and a second purlin bracket 2. Both purlin brackets have a semi-circular structure, and outwardly extending wing plates 5 are respectively provided on the sides of the semi-circular structure. Bolt fixing holes 6 are respectively opened on the wing plates 5. When the first purlin bracket 1 and the second purlin bracket 2 are spliced, the bolt fixing holes on their respective wing plates are aligned and bolts are screwed in to fix the first purlin bracket 1 and the second purlin bracket 2. At this time, the clamping area formed by the splicing of the first purlin bracket 1 and the second purlin bracket 2 matches the outer contour shape and size of the existing purlin bracket 11, so that the support structure 10 formed by the splicing of the first purlin bracket 1 and the second purlin bracket 2 can be clamped and fixed to the outer periphery of the existing purlin bracket 11 without damage and quickly.

[0023] like Figure 3 As shown, connecting plates 3 extending outwards are respectively provided on the upper part of the semi-circular structure of the first purlin support 1 and the second purlin support 2. These connecting plates 3 are used to provide stable support for the newly added main purlin 12 supported above. Combined with... Figures 1 to 3 As shown, in this embodiment, two connection holes 4 are provided on the connecting plate 3. The two connection holes 4 can be simply connected to the newly added main purlin 12 above by bolts or other connecting parts, thereby ensuring that the newly added main purlin 12 can be effectively and stably supported by the connecting plate 3, while further increasing the structural stability and safety of the newly added main purlin 12.

[0024] like Figure 3 As shown, in order to ensure the structural strength and stability of the connecting plate 3, shear stiffening ribs 7 are respectively provided below the connecting plate 3 of the first purlin support 1 and the second purlin support 2. The shear stiffening ribs 7 extend along the extension direction of the connecting plate 3 and are of equal length, thereby increasing the load-bearing capacity of the connecting plate 3.

[0025] In this embodiment, as Figure 1As shown, new main purlins 12 are installed parallel to each other on both sides of the existing purlin 8 along the vertical line direction. When the added main purlins 12 still cannot meet the design requirements of the upper dead load to a certain extent, new secondary purlins 13 can be added between the adjacent new main purlins 12. The new secondary purlins 13 are connected and fixed with the new main purlins 12 to form an integral load-bearing structure, further increasing the load-bearing capacity.

[0026] In this embodiment, during construction, since the purlins of the steel space frame structure are connected and transmit force through the space frame ball nodes 9 and the members, it is also necessary to reinforce the members and perform structural system verification when adding new main purlins 12 or further adding new secondary purlins 13 on this basis.

[0027] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A purlin arrangement for roof retrofit of a space truss for installing a new primary purlin at the location of an existing purlin mounted on a space truss ball joint having an existing purlin bracket, characterized in that: The support structure is arranged on the existing purlin support, and has a connecting plate with connecting holes, the new main purlin is arranged on the connecting plate and perpendicular to the existing purlin, and the new main purlin and the connecting plate are simply supported by connecting pieces screwed into the connecting holes.

2. A purlin arrangement for a roof retrofit of a space frame roof according to claim 1, wherein: A plurality of the new main purlins are arranged in the vertical line direction, and new secondary purlins are arranged between adjacent new main purlins and fixedly connected with the new main purlins.

3. A purlin arrangement for a roof retrofit of a space frame roof according to claim 1, wherein: The support structure includes two structurally identical purlin supports, which are fixedly connected by connecting pieces and combined to form a matching space for the existing purlin support of the net rack ball joint, so that the support structure is matched around the existing purlin support.

4. A purlin arrangement for a roof retrofit of a space frame roof according to claim 3, wherein: A shear-resistant stiffening rib plate is arranged between the purlin support and the connecting plate and below the connecting plate.

5. A purlin arrangement for a roof retrofit of a space frame roof according to claim 3, wherein: The two purlin supports each have a wing plate with bolt fixing holes, and the wing plates of the two purlin supports are fixedly connected by bolts screwed into the bolt fixing holes.

6. A purlin arrangement for a roof retrofit of a space frame roof according to claim 5, wherein: A plurality of bolt fixing holes are arranged in the height direction of the wing plate.

7. A purlin arrangement for a roof retrofit of a space frame roof according to claim 1, wherein: A plurality of connecting holes are reserved on the connecting plate.

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