Connecting joint of steel truss and plane truss

Abstract

The utility model discloses a connecting node of a steel net rack and a plane truss, which comprises the steel net rack and the plane truss, and further comprises an upper chord member and a welding hemisphere, four groups of connected frame rods of the plane truss are formed by welding diagonal web members between the upper chord member and a lower chord member, and the four groups of frame rods of the plane truss are connected to form a rectangular frame. A horizontal stiffening rib and a vertical stiffening rib B are fixed in an upper chord of the plane truss, a welding hemisphere with a vertical stiffening rib A is welded outside the plane of the upper chord of the plane truss, and a net rack horizontal rod piece of the steel net rack is welded to the welding hemisphere with the ribs in a penetrating mode and connected with the plane truss. According to the node connection mode, the traditional method that a bracket is arranged outside the plane truss upper chord rod face to support the net rack is avoided, and the node structure is reliable in force transmission, simple in connection and good in economical efficiency, meets the requirements of strong nodes and weak components and has good anti-seismic performance.

Description

Technical Field

[0001] The utility model relates to the technical field of building steel structure connection, and particularly relates to a connection node between a steel grid and a planar truss. Background Technique

[0002] The connection node of components is a key part to ensure the safety and reliability of space structures, which affects the mechanical properties, processing and manufacturing, on-site installation and project cost of the structure. The space steel grid structure is widely used in large-span industrial and civil buildings.

[0003] Conventional support nodes are often supported on the top of columns. The node force transmission is reliable and the connection is simple. However, for the connection node with a planar truss as the support member, if brackets are set on the upper and lower chord bars of the truss to support the grid, it will not only affect the building effect but also have complex connection, poor economy, great construction difficulty and low reliability. Therefore, we propose a connection node between a steel grid and a planar truss. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a connection node between a steel grid and a planar truss. A welded hemisphere with a vertical stiffener A is welded outside the plane of the upper chord bar of the planar truss. The grid horizontal members of the steel grid are welded to the ribbed welded hemisphere to connect with the planar truss. This node connection form avoids the traditional method of setting brackets on the outside of the upper chord bar of the planar truss to support the grid. This node structure has reliable force transmission, simple connection, good economy, meets the requirement of "strong node and weak member", has good seismic performance, and can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A connection node between a steel grid and a planar truss, including a steel grid and a planar truss, and further including an upper chord bar and a welded hemisphere. The four groups of connected struts of the planar truss are composed of diagonal web members welded between the upper chord bar and the lower chord bar, and the four groups of struts of the planar truss are connected to form a rectangular frame. A horizontal stiffener and a vertical stiffener B are fixed inside the upper chord bar of the planar truss. A cross stiffener is formed by fixing a vertical stiffener C between the vertical stiffeners B on the upper chord bar and the horizontal stiffener. A welded hemisphere is fixed at the web of the upper chord bar, and a vertical stiffener A is fixed inside the welded hemisphere. The double-layer mesh body of the steel grid is welded by grid horizontal members according to a mesh structure, and grid diagonal members are fixed between the double-layer mesh bodies welded by the grid horizontal members. The grid horizontal members of the steel grid are welded to the welded hemisphere with a vertical stiffener A in a penetrating manner.

[0007] Furthermore, the cross-section of the rod body of the upper chord bar is a box-shaped cross-section;

[0008] By adopting the above technical solution, the upper chord of the box section has good strength.

[0009] Further, the diagonal members of the grid are welded between the welded joints of the horizontal members of the grid, and the diagonal members of the grid are welded between the welded joints of the horizontal members of the grid and the welded hemisphere.

[0010] By adopting the above technical solution, the welded joints of the horizontal members of the grid are connected by welding the diagonal members of the grid, and the welded joints of the horizontal members of the grid are also connected at the welded hemisphere through the diagonal members of the grid.

[0011] Further, column members are fixedly distributed in a rectangular form under the truss bars of the planar truss.

[0012] By adopting the above technical solution, there are column members under the truss bars of the planar truss that can press down on the ground or other building positions to obtain support.

[0013] Further, the outer arc surface of the welded hemisphere is welded to the exposed horizontal members of the steel grid at the edge, and the planar body of the welded hemisphere is welded outside the web of the upper chord.

[0014] By adopting the above technical solution, the horizontal members of the steel grid at the edge can obtain support at the upper chord of the planar truss by means of the welded hemisphere.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] In the present utility model, a welded hemisphere with a vertical stiffener A is welded outside the plane of the upper chord of the planar truss, and the intersecting welds of the horizontal members of the steel grid are connected to the planar truss on the ribbed welded hemisphere. This form of joint connection avoids the traditional method of setting brackets on the outside of the plane of the upper chord of the planar truss to support the grid. This joint structure has reliable force transmission, simple connection, good economy, meets the requirement of "strong joints and weak members", and has good seismic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a connection joint between a steel grid and a planar truss of the present utility model.

[0018] Figure 2 It is a sectional view of the connection joint between a steel grid and a planar truss of the present utility model.

[0019] Figure 3 It is an elevation view of the connection joint between a steel grid and a planar truss of the present utility model.

[0020] In the figure: 1. Steel grid; 2. Planar truss; 3. Upper chord; 4. Welded hemisphere; 5. Horizontal grid member; 6. Diagonal grid member; 7. Vertical stiffener A; 8. Horizontal stiffener; 9. Vertical stiffener B; 10. Vertical stiffener C; 11. Diagonal web member. Detailed implementation mode

[0021] To make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with the detailed implementation mode.

[0022] As Figures 1 - 3 shown, a connection node between a steel grid and a planar truss includes a steel grid 1 and a planar truss 2, and also includes an upper chord 3 and a welded hemisphere 4. The four groups of connected truss members of the planar truss 2 are composed of diagonal web members 11 welded between the upper chord 3 and the lower chord, and the four groups of truss members of the planar truss 2 are connected to form a rectangular frame. A horizontal stiffener 8 and a vertical stiffener B9 are fixed inside the upper chord 3 of the planar truss 2. The upper chord 3 between the vertical stiffeners B9 and the horizontal stiffener 8 are fixed with a vertical stiffener C10 to form a cross stiffener. A welded hemisphere 4 is fixed at the web of the upper chord 3, and a vertical stiffener A7 is fixed inside the welded hemisphere 4. The double-layer mesh structure of the steel grid 1 is welded by grid horizontal members 5 in a mesh structure, and grid diagonal members 6 are fixed between the double-layer mesh structures welded by the grid horizontal members 5. The grid horizontal members 5 of the steel grid 1 are penetrated and welded to the welded hemisphere 4 with a vertical stiffener A7.

[0023] Among them, the cross-section of the rod body of the upper chord 3 is a box-shaped cross-section;

[0024] By adopting the above technical solution, the upper chord 3 with a box-shaped cross-section has better strength.

[0025] Among them, the grid diagonal members 6 are welded between the welding joints of the grid horizontal members 5, and the grid diagonal members 6 are welded between the welding joints of the grid horizontal members 5 and the welded hemisphere 4;

[0026] By adopting the above technical solution, the welding joints of the grid horizontal members 5 are welded and connected by the grid diagonal members 6, and the welding joints of the grid horizontal members 5 are also connected at the welded hemisphere 4 through the grid diagonal members 6.

[0027] Among them, column supports are fixedly distributed in a rectangular shape below the truss members of the planar truss 2;

[0028] By adopting the above technical solution, there are column supports below the truss members of the planar truss 2, which can press down on the ground or other building positions to obtain support.

[0029] Among them, the horizontal grid bars 5 exposed at the edge of the steel grid frame 1 are welded to the outer arc surface of the welding hemisphere 4, and the flat body of the welding hemisphere 4 is welded outside the web of the upper chord 3;

[0030] By adopting the above technical solution, the horizontal grid bars 5 at the edge of the steel grid frame 1 can obtain support at the upper chord 3 of the planar truss 2 by means of the welding hemisphere 4.

[0031] It should be noted that the present utility model is a connection node between a steel grid frame and a planar truss. The outer connection between the steel grid frame 1 and the upper chord 3 of the planar truss 2 is connected by a welding hemisphere 4. Horizontal stiffeners 8 are arranged inside the upper chord 3 for strengthening, vertical stiffeners B9 and vertical stiffeners C10; vertical stiffeners A7 are arranged inside the welding hemisphere 4 for strengthening, and it is welded to the web of the upper chord 3 with the top planed and tightly abutted. The welding hemisphere 4, the upper chord 3 and related stiffeners are all fabricated and assembled in the factory, and the quality of the node is guaranteed. After the overall lifting of the grid structure at the construction site, the peripheral grid bars are welded to the hemisphere on site. Strengthening is carried out by arranging stiffeners inside the upper chord 3 of the planar truss 2 and the welding hemisphere 4, and the concentrated force converging from the horizontal grid bars 5 and the diagonal grid bars 6 of the grid is transmitted to the upper chord 3 of the planar truss 2. Therefore, by adopting the design method of this node, not only the force transmission is reliable, the connection is simple, and the economy is good, but also the requirement of "strong node and weak member" is achieved, and it has good seismic performance. The rod body of the diagonal web member 11 can be selected to use a high-strength rod body with an H-shaped cross-section.

[0032] It should be noted that the present utility model is a connection node between a steel grid frame and a planar truss. The components in the present utility model are all components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A connection node between a steel grid and a plane truss, comprising a steel grid (1) and a plane truss (2), characterized in that: It also includes an upper chord (3) and a welded hemisphere (4), wherein the four groups of connected frame rods of the plane truss (2) are composed of diagonal webs (11) welded between the upper chord (3) and the lower chord, and the four groups of frame rods of the plane truss (2) are connected to form a rectangular frame, and horizontal stiffening ribs (8) and vertical stiffening ribs B (9) are fixed inside the upper chord (3) of the plane truss (2), and vertical stiffening ribs C (10) are fixed between the upper chord (3) and the horizontal stiffening ribs (8) between the vertical stiffening ribs B (9). A cross stiffening rib is formed, a welded hemisphere (4) is fixed at the web of the upper chord (3), and a vertical stiffening rib A (7) is fixed inside the welded hemisphere (4), a double-sheet mesh frame of the steel grid (1) is formed by welding horizontal grid members (5) according to a mesh structure, and a grid oblique member (6) is fixed between the double-sheet mesh frame formed by welding the horizontal grid members (5), and the horizontal grid members (5) of the steel grid (1) are welded to the welded hemisphere (4) with the vertical stiffening rib A (7).

2. The connection node between a steel grid and a plane truss according to claim 1, characterized in that: The cross section of the rod body of the upper chord rod (3) is a box-shaped cross section.

3. The connection node between a steel grid and a plane truss according to claim 1, characterized in that: The grid oblique rods (6) are welded between the welding nodes of the grid horizontal rods (5), and the grid oblique rods (6) are welded between the welding nodes of the grid horizontal rods (5) and the welding hemispheres (4).

4. The connection node between a steel grid and a plane truss according to claim 1, characterized in that: Columns are fixedly arranged in a rectangular pattern below the frame rods of the planar truss (2).

5. The connection node between a steel grid and a plane truss according to claim 1, characterized in that: The horizontal grid rods (5) exposed at the edge of the steel grid (1) are welded to the outer arc surface of the welding hemisphere (4), and the plane body of the welding hemisphere (4) is welded to the outside of the web of the upper chord (3).

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