Connecting structure of intersection nodes of multi-folding-surface single-layer grid structure and grid roof

Abstract

The utility model discloses a multi-folding surface single layer grid structure intersection node connecting structure and a grid roof, including main rod piece and a plurality of secondary rod piece, each secondary rod piece is distributed at the both sides of main rod piece, main rod piece and the plurality of secondary rod pieces are all rectangular rod piece, the top flange of main rod piece is higher than the top flange of secondary rod piece, the top flange of secondary rod piece is higher than the top flange of secondary rod piece, the top flange of secondary rod piece is higher than the top flange of secondary rod piece. The lower flange of the main rod piece is lower than the lower flanges of the secondary rod pieces, the extension line of the center line of the upper flange of each secondary rod piece and the positioning axis of the upper flange of the main rod piece are intersected at one point, the secondary rod pieces are fixedly connected with the main rod piece, and the end part of the intersection end of the main rod piece is provided with an extension part which extends outwards. The single-layer grid structure is simple in structure, solves the problem of connection of rectangular sections at intersection points of a plurality of folding surfaces of the single-layer grid structure, and facilitates construction and installation of nodes.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a connection structure of intersection nodes of a multi-folded surface single-layer grid structure and a grid roof. Background Art

[0002] The single-layer grid structure roof is a spatial bar structure combined according to a certain rule. It has the properties of both bar system and shell. Its force transmission characteristics are mainly to form a balanced structural system through tension, pressure or shear force in two directions in the shell, and rigid connections are used between the bars. The single-layer grid structure can be a steel structure composed of rectangular bars. It has the characteristics of light weight, material saving, light shape, and strong aesthetics. It is suitable for large-span light roofs and is increasingly used in roofs in the construction field.

[0003] The existing single-layer grid structure adopts two or less folding surfaces to intersect according to the shape to form a single-layer folding grid. The single-layer folding grid structure is a spatial bar system structure similar to a flat grid. The folding surface is formed based on the bar. There are fewer bars at the intersection of the nodes, and the connection of the nodes is relatively simple. With the complexity and diversification of architectural shapes, multiple folding surfaces intersect, and boundary beams are set at the intersection of the folding surfaces. At the intersection of multiple folding surfaces, the angle between each bar is determined according to the slope of the folding surface, and the angles are different. It is difficult to connect the bars at the nodes, which is not convenient for on-site welding construction. Summary of the invention

[0004] The purpose of the utility model is to address the deficiencies in the prior art and to provide a connection structure and a grid roof for the intersection nodes of a multi-folded single-layer grid structure. The structure is simple, and the connection problem of the intersection nodes of multiple folded surfaces of a single-layer grid structure is solved, which is convenient for on-site installation and construction.

[0005] One of the purposes of the utility model is to adopt a technical solution:

[0006] A connection structure of intersecting nodes of a multi-folded single-layer grid structure, comprising a main rod and a plurality of secondary rods, each of the secondary rods being distributed on both sides of the main rod, the main rod and the plurality of secondary rods being rectangular rods, the upper flange of the main rod being higher than the upper flange of the secondary rod, the lower flange of the main rod being lower than the lower flange of the secondary rod, the extension line of the center line of the upper flange of the secondary rod intersecting with the positioning axis of the upper flange of the main rod at one point, the secondary rod being fixedly connected to the main rod, and the intersecting ends of the main rod being provided with extension portions extending outward.

[0007] Furthermore, the main rod and the secondary rod are both hollow rectangular structures, and the extended end of the main rod is provided with a sealing end plate.

[0008] Furthermore, a plurality of evenly distributed transverse reinforcement plates are provided in the intersection of the main rods.

[0009] Furthermore, a connection portion extending downward is provided on the lower flange side of the intersection of the main rods, and a transition slope is provided between the connection portion and the main rod to form a variable cross-section.

[0010] Furthermore, the slope ratio of the transition slope is 1:6.

[0011] Furthermore, the upper flange of the main rod is 30 to 50 mm higher than the upper flange of the secondary rod, and the lower flange of the main rod is 30 to 50 mm lower than the lower flange of the secondary rod.

[0012] The second technical solution adopted by the utility model is:

[0013] A grid roof comprises a plurality of folded surface single-layer grids, wherein the folded surface single-layer grids adopt a connection structure of intersection nodes of any of the above-mentioned multi-folded surface single-layer grid structures.

[0014] The above technical solution has the following beneficial effects:

[0015] The structure of the utility model is simple. Due to the different spatial orientation angles of each secondary rod, the positioning axis of the upper flange of the main rod intersects with the extension line of the center line of the upper flange of each secondary rod. In this way, the upper flange of the main rod only needs to adjust a small size upward to meet the requirements of connecting the secondary rods, ensuring that the top surface elevations of the main and secondary rods are basically consistent. In order to facilitate the connection between the web and flange of the secondary rod and the main rod, the main rod is provided with an outwardly extending extension at the head of the intersection end according to the size of the secondary rod, so as to facilitate the welding and installation of the secondary rod on the main rod. Therefore, the utility model realizes: 1. The node force is clear, which meets the calculation requirements of the mechanical model of the structural calculation software and ensures the safety of the node structure. 2. The main rod and the secondary rod are spliced ​​and welded on site, and the node welding quality can be guaranteed through factory pre-processing. 3. The rod positioning accuracy is high. 4. The outwardly extending extension is provided at the intersection end of the main rod to facilitate the construction of node welding.

[0016] The main rod and the secondary rod both adopt a hollow rectangular structure. The extended end of the main rod is provided with a sealing end plate, which effectively prevents water vapor in the air from entering the rod and corroding the rod.

[0017] A plurality of evenly distributed transverse reinforcing plates are arranged in the intersection of the main rods to meet the mechanical performance requirements of the rigid connection of the nodes.

[0018] When the cross-sectional height of the main rod is relatively small and the lower flange of the main rod cannot meet the node connection requirements of the secondary rod, the method of increasing the cross-sectional height of the main rod downward at the intersection of the node is adopted, that is, a downwardly extending connecting portion is provided on the lower flange side of the intersection of the main rod, and a transition slope is provided between the connecting portion and the main rod to form a variable cross-section, thereby ensuring the continuity of the structural force.

[0019] The slope ratio of the transition slope is 1:6, which has the best force-bearing effect.

[0020] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of specific embodiment 1;

[0022] Figure 2 It is a front view of specific embodiment 1;

[0023] Figure 3 This is a structural schematic diagram of a specific embodiment 1 in which a transverse reinforcement plate is added;

[0024] Figure 4 for Figure 3 A longitudinal cross-sectional view of

[0025] Figure 5 It is a structural schematic diagram of specific embodiment 2.

[0026] In the attached drawings, 1 is a main rod, 1-1 is an extension part, 1-2 is a transition slope, 1-3 is a connecting part, 2 is a secondary rod, 2-1 is a first rod, 2-2 is a second rod, 2-3 is a third rod, 2-4 is a fourth rod, 3 is a sealing end plate, and 4 is a transverse reinforcement rib. DETAILED DESCRIPTION Specific embodiment 1:

[0028] See also Figures 1 to 4As shown, a connection structure of the intersection node of a multi-folded single-layer grid structure includes a main rod 1 and a plurality of secondary rods 2, wherein the plurality of secondary rods 2 include a first rod, a second rod 2-2, a third rod, and a fourth rod 2-4. The main rod 2 and each secondary rod 2 are hollow rectangular structures. The rod in the middle is the main rod, and each secondary rod 2 is distributed on both sides of the main rod 2. Each secondary rod 2 intersects with one end of the main rod 1. The upper flange of the main rod 1 is higher than the upper flange of the secondary rod 2, and the lower flange of the main rod 1 is lower than the lower flange of the secondary rod 2. The upper flange of the main rod 1 is 30 to 50 mm higher than the upper flange of the secondary rod 2, and the lower flange of the main rod 1 is 30 to 50 mm lower than the lower flange of the secondary rod 2, so as to facilitate welding and leave enough weld height. The extension line of the center line of the upper flange of each secondary rod 2 intersects with the positioning axis of the upper flange of the main rod 1 at a point a. The secondary rod is fixedly connected to the main rod by welding. The intersecting end of the main rod 1 is provided with an extension portion 1-1 extending outward. The length L from the intersection point a of the main rod 1 and each secondary rod 2 to the end of the extension of the main rod 1 is greater than or equal to 200mm and less than or equal to 300mm. In this specific embodiment: the length L from the intersection point a of the main rod 1 and each secondary rod 2 to the end of the extension of the main rod 1 is 300mm, which is convenient for welding the secondary rod to the main rod and avoids affecting the installation of other roof components. The extension end of the main rod 1 is provided with a sealing end plate 3.

[0029] Possibly, if the cross-sectional height of the main rod 1 is small, the lower flange of the main rod 1 cannot meet the node connection requirements of the secondary rod, and a downwardly extending connecting portion 1-3 is provided on the lower flange side of the intersection of the main rod 1, and a transition slope 1-2 is provided between the connecting portion 1-3 and the main rod, and the slope ratio of the vertical height to the horizontal distance of the transition slope 1-2 is 1:6, forming a variable cross-section, thereby ensuring that the upper flange of the main rod 1 is higher than the upper flange of the secondary rod 2, and the lower flange of the main rod 1 is lower than the lower flange of the secondary rod 2.

[0030] Possibly, a plurality of evenly distributed transverse reinforcing plates 4 are provided in the intersection of the main rods 1 . In this specific embodiment, three transverse reinforcing plates 4 are provided in the intersection of the main rods 1 . Specific embodiment 2:

[0032] See also Figure 5 As shown, the characteristics of this specific embodiment are: a grid roof, including a plurality of folded surface single-layer grids, wherein the plurality of folded surface single-layer grids adopt the connection structure of the intersection nodes of the multi-folded surface single-layer grid structure described in specific embodiment 1. Other characteristics are the same as those in specific embodiment 1, so this specific embodiment is omitted here.

[0033] This specific embodiment: The grid roof is provided with five folding surfaces, including a main rod 1 and four secondary rods 2, which are the first rod 2-1, the second rod 2-2, the third rod 2-3 and the fourth rod 2-4. The first rod 2-1 and the second rod 2-2 are arranged on one side of the main rod 1, and the third rod 2-3 and the fourth rod 2-4 are arranged on the other side of the main rod 1. Each secondary rod is overlapped and fixedly connected to one end of the main rod 1 in sequence according to the spatial position arrangement, and groove welding is used for equal strength connection. In order to ensure the welding quality, it is recommended to carry out factory welding in the steel structure processing plant, and the main rod and each secondary rod are reserved for on-site splicing. The actual connection force performance of the node of the utility model meets the purpose of the rigid node calculation assumption in the structural calculation software.

Claims

1. A connection structure of intersection nodes of a multi-folded single-layer grid structure, comprising a main rod and a plurality of secondary rods, each of the secondary rods is distributed on both sides of the main rod, the main rod and the plurality of secondary rods are rectangular rods, characterized in that: The upper flange of the main rod is higher than the upper flange of the secondary rod, and the lower flange of the main rod is lower than the lower flange of the secondary rod. The extension line of the center line of the upper flange of each secondary rod intersects with the positioning axis of the upper flange of the main rod at one point. The secondary rod is fixedly connected to the main rod, and the intersecting ends of the main rod are provided with extension parts extending outward.

2. The connection structure of the intersection nodes of the multi-folded single-layer grid structure according to claim 1, characterized in that: The main rod and the secondary rod are both hollow rectangular structures, and a sealing end plate is provided at the extended end of the main rod.

3. The connection structure of the intersection nodes of the multi-folded single-layer grid structure according to claim 2 is characterized in that: A plurality of evenly distributed transverse reinforcement plates are arranged in the intersection of the main rods.

4. The connection structure of the intersection nodes of the multi-folded single-layer grid structure according to claim 1, characterized in that: A connecting portion extending downward is provided on the lower flange side of the intersection of the main rods, and a transition slope is provided between the connecting portion and the main rod to form a variable cross-section.

5. The connection structure of the intersection nodes of the multi-folded single-layer grid structure according to claim 4, characterized in that: The slope ratio of the transition slope is 1:

6.

6. The connection structure of the intersection nodes of the multi-folded single-layer grid structure according to claim 1, characterized in that: The upper flange of the main rod is 30 to 50 mm higher than the upper flange of the secondary rod, and the lower flange of the main rod is 30 to 50 mm lower than the lower flange of the secondary rod.

7. A grid roof, comprising a plurality of folded single-layer grids, characterized in that: The folded surface single-layer grid adopts the connection structure of the intersection nodes of the multi-folded surface single-layer grid structure described in any one of claims 1 to 6.

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