Integrated joint suitable for string hanging composite structure and construction method

Abstract

The invention discloses an integrated joint suitable for a string hanging composite structure and a construction method. The joint comprises a joint core column body, a plurality of lug plates arranged along the circumferential side of the joint core column body, a supporting rod component used for being connected with the upper portion of the joint core column body, and a hanging rod component used for being connected with the lower portion of the joint core column body. The lug plates are used for connecting the inhaul cables converged in all directions, the central axes of the cross sections of the supporting rod component, the inhaul cables and the suspender component are converged at one point, and the integrated joint is formed at a time through an integral casting production process. The device can adapt to the situation that multi-direction and multi-gauge inhaul cables, supporting rods and suspenders are intersected in the structure, machining and manufacturing are convenient and fast, welding seam concentration is avoided, the installation quality is reliable, and the aesthetic effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structures, and in particular to an integrated node and a construction method for a string-suspended composite structure. Background Art

[0002] With the rapid development of the construction industry and the increasing demand for large-span and large-space structures, a composite structure in which other structures are suspended below the string structure has been proposed and gradually widely used in the field of public steel structures. The string structure in the string-suspended composite structure is a self-balancing force system formed by the reasonable arrangement of struts, which is composed of an upper chord rigid component and a lower chord flexible cable. When other structures are suspended below it, a suspender needs to be set at the bottom of the strut to connect the lower structure. Therefore, the struts, cables and suspenders intersect at one point, and the node form is very complex.

[0003] In the traditional design method, the cables and struts and hangers can usually be connected to the struts and hangers through pins using cable clamp nodes, and the cables are continuous at the nodes. However, when there are cables of multiple directions and specifications in the space at the nodes, the conventional cable clamp nodes cannot meet the requirements. The cables are discontinuous at the nodes, and different cables and struts, hangers and other components need to be connected to the nodes respectively. The nodes need to be equipped with cable connectors, strut connectors and hanger connectors, etc. There are many components, which are difficult to process. There are often problems such as dense welds and stress concentration during production and installation, and the force performance and installation quality of the nodes are difficult to guarantee. Moreover, the overall size of the node after a large number of connectors are set is generally large, which will also seriously affect the appearance of the building. Therefore, it is of great engineering significance to design a new node form suitable for the intersection of cables and struts and hangers in multiple directions and specifications in the string suspension structure, which is convenient to process and manufacture, avoids weld concentration, has reliable installation quality and has both aesthetic effects. It is a problem that technicians in the relevant technical field need to solve urgently. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of traditional design methods for connecting nodes of struts, cables and hangers in a string-suspended composite structure, and to propose an integrated node form and a construction method suitable for a string-suspended composite structure, which can adapt to the intersection of cables and struts and hangers in multiple directions and specifications in the structure, is convenient to process and manufacture, avoids concentrated welds, has reliable installation quality and has both aesthetic effects.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: an integrated node suitable for a string-suspended composite structure, comprising a node core column, a plurality of ear plates are arranged along the circumference of the node core column, the upper part of the node core column is used to connect the strut member above it, and the lower part is used to connect the suspension member below it, the ear plates are used to connect cables converging from various directions, the cross-sectional central axes of the strut members, cables and suspension members converge at one point, and the integrated node is formed in one step by an integral casting production process.

[0006] Furthermore, two columnar steps are provided on the upper part of the core column of the node, the diameter of the first columnar step is the same as the outer diameter of the upper strut member, and the diameter of the second columnar step is slightly smaller than the inner diameter of the upper strut. The upper strut can be clamped on the second columnar step, and the side wall of the step serves as a gasket when the strut member is welded to the node, thereby realizing an equal strength connection between the strut and the cast steel node.

[0007] Furthermore, the middle and lower part of the node core column is a hollow tubular cavity, and threads are provided on the side walls of the cavity, which are connected to the suspension rod member below through the threads.

[0008] Furthermore, the planes where the ear plates are located are arranged perpendicular to the ground, and a circular hole is arranged on each ear plate for installing a pin to connect the cable.

[0009] Furthermore, a patch plate is provided at the circular hole of the ear plate for local thickening, so as to reinforce the opening and alleviate stress concentration.

[0010] The above-mentioned integrated node construction method has the following specific steps:

[0011] (1) During the ground construction phase, the bracing member is hooped onto the second columnar step of the integrated node, and then fully penetrated welded;

[0012] (2) The ball joint of the suspension rod component is threadedly connected to the lower cavity of the integrated node, and the support rod component, the integrated node and the suspension rod component are connected as a whole on the ground;

[0013] (3) Using hoisting and other construction techniques to hoist the connected brace members, integrated nodes and hoist members into place in the air, and fix the brace members;

[0014] (4) The cables that converge at the node in various directions are connected to the integrated node through a pin shaft.

[0015] Furthermore, the number and angle of the lugs of the integrated node are determined according to the number and angle of the cables in the structure, the lugs are coplanar with the cables and the center lines of each lug are colinear with the cables and intersect at one point with the center lines of the struts and the hangers.

[0016] Furthermore, in the above-mentioned integrated node, the strut member is welded to the upper part of the node, the cable is connected to the node ear plate pin, the hanger member is threadedly connected to the lower part of the integrated node, but the top of the hanger adopts a ball joint. Therefore, the connection between the strut and the cable and the hanger is hinged, which meets the calculation assumptions and meets the structural design requirements.

[0017] Furthermore, the integrated node should be assembled and welded with the struts first during the ground construction phase, and then the hanger ball joint should be screwed into the lower part of the node, and then installed into place at high altitude together with the struts. In the air, only the pins between each cable and the node ear plate need to be installed to complete the node installation.

[0018] In summary, the present invention has the following beneficial effects:

[0019] (1) The integrated node has strong applicability, especially for the situation where cables with multiple directions and specifications intersect with struts and hangers in the string-suspended composite structure. The adaptation requirements can be met by adjusting the angle of the node ear plate without changing the structural form.

[0020] (2) The node is integrally cast in one step, with high processing efficiency and good integrity, avoiding weld concentration and ensuring processing quality;

[0021] (3) The cross-sectional center lines of the struts, cables, and suspenders converge at one point, which avoids the generation of additional internal forces at the nodes and components. The node stress performance is good and highly consistent with the design assumptions;

[0022] (4) There is only a small amount of welding work and it is completed on the ground. When installing at high altitude, only the cable pin needs to be inserted. The high altitude work is small and the operation is convenient, with good safety and reliable installation quality;

[0023] (5) The node design is ingenious, especially when the hanger is connected, it is embedded inside the integrated node, with a delicate appearance and good aesthetic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of an integrated node structure according to an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the integrated node and the connection of the strut, cable and suspension rod components according to an embodiment of the present invention;

[0026] Figure 3 This is a main view of an integrated node according to an embodiment of the present invention;

[0027] Figure 4 A top view of an integrated node according to an embodiment of the present invention;

[0028] Figure 5 This is a left view of an integrated node according to an embodiment of the present invention;

[0029] Figure 6 The integrated node of the embodiment of the present invention is Figure 5 Cross-section of the middle AA;

[0030] In the figure: 1. Node core column; 2. Ear plate; 3. Strut member; 4. Suspension rod member; 5. Cable; 6. Columnar step; 7. Lower cavity of core column; 8. Thread on side wall of cavity; 9. Circular hole in ear plate; 10. Cable pin; 11. Paste plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 The present invention is described in further detail.

[0032] An integrated node suitable for a string-suspended composite structure, such as Figures 1 to 6 As shown, the integrated node includes a node core column 1 and three ear plates 2, the upper part of the node core column 1 is connected to a brace member 3, the lower part of the node core column 1 is connected to a suspension member 4, the three ear plates 2 are arranged on the side of the node core column 1 to connect cables 5 coming from various directions, and the integrated node is formed in one step by an integral casting production process. The cross-sectional central axes of the brace member 3, the suspension member 4 and the cable 5 converge at a point O.

[0033] Two columnar steps 6 are arranged on the upper part of the node core column 1, each step is 20 mm high, the diameter of the first columnar step is the same as the outer diameter of the upper strut member 3, the diameter of the second columnar step is 4 mm smaller than the inner diameter of the upper strut member 3, the upper strut member 3 is clamped on the first columnar step, and the side wall of the step serves as a gasket when the strut member is welded to the node, so as to realize an equal strength connection between the strut and the cast steel node.

[0034] The middle and lower part of the node core column 1 is a hollow tubular cavity 7, and the side wall of the cavity 7 is provided with a thread 8, which is connected to the suspension rod member 4 below.

[0035] The planes where the ear plates 2 are located are all arranged perpendicular to the ground. A circular hole 9 is arranged on each ear plate 2. The diameter of the hole 9 is 2 mm larger than the cable pin shaft 10 and is used to install the pin shaft 10 to connect the cable.

[0036] The holes 9 on the ear plate 2 are locally thickened by using a pasting plate 11, so as to reinforce the openings and alleviate stress concentration.

[0037] The construction method of the above integrated node is as follows:

[0038] (1) During the ground construction phase, the bracing member 3 is hooped onto the second columnar step 6 of the integrated node, and then fully penetrated welded;

[0039] (2) The ball joint of the suspension rod member 4 is threadedly connected to the lower cavity 7 of the integrated node, and the support rod member 3, the integrated node and the suspension rod member 4 are connected as a whole on the ground;

[0040] (3) hoisting the brace member 3 connected as one into the air and fixing it in place;

[0041] (4) The cables 5 that converge at the node in various directions are connected to the integrated node ear plate 2 through the pin shaft 10, thereby completing the node installation.

[0042] The construction of integrated nodes only involves a small amount of welding work on the ground, less work at high altitude, and convenient installation, which significantly improves construction efficiency.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An integrated node suitable for a string-suspended composite structure, characterized in that: It includes a node core column, and a plurality of ear plates are arranged along the circumference of the node core column. The upper part of the node core column is used to connect the strut member above it, and the lower part is used to connect the suspension member below it. The ear plates are used to connect cables converging from various directions. The cross-sectional central axes of the strut members, cables and suspension members converge at one point. The integrated node is formed in one step by an integral casting production process.

2. The integrated node suitable for a string-suspended composite structure according to claim 1, characterized in that: Two columnar steps are arranged on the upper part of the core column of the node. The diameter of the first columnar step is the same as the outer diameter of the upper strut component, and the diameter of the second columnar step is slightly smaller than the inner diameter of the upper strut. The upper strut can be clamped on the second columnar step, and the side wall of the step serves as a gasket when the strut component is welded to the node, so as to realize an equal strength connection between the strut and the cast steel node.

3. The integrated node suitable for a string-suspended composite structure according to claim 1, characterized in that: The middle and lower part of the node core column is a hollow tubular cavity, and a thread is arranged on the side wall of the cavity, which is connected to the suspension rod member below through the thread.

4. The integrated node suitable for a string-suspended composite structure according to claim 1, characterized in that: The planes where the ear plates are located are all arranged perpendicular to the ground, and a circular hole is arranged on each ear plate for installing a pin shaft to connect the cable.

5. The integrated node suitable for a string-suspended composite structure according to claim 4, characterized in that: A patch plate is provided at the circular hole of the ear plate for local thickening, which is used to reinforce the opening and alleviate stress concentration.

6. The construction method of the integrated node according to any one of claims 1 to 5, characterized in that: The specific steps are as follows: (1) During the ground construction phase, the bracing member is hooped onto the second columnar step of the integrated node, and then fully penetrated welded; (2) The ball joint of the suspension rod component is threadedly connected to the lower cavity of the integrated node, and the support rod component, the integrated node and the suspension rod component are connected as a whole on the ground; (3) Using hoisting and other construction techniques to hoist the connected brace members, integrated nodes and hoist members into place in the air, and fix the brace members; (4) The cables that converge at the node in various directions are connected to the integrated node through a pin shaft.

7. The construction method of the integrated node applicable to the composite structure of the string suspension according to claim 6 is characterized in that: The number and angle of the lugs of the integrated node are determined according to the number and angle of the cables in the structure. The lugs are coplanar with the cables and the center lines of each lug are colinear with the cables and intersect at one point with the center lines of the struts and hangers.

8. The construction method of the integrated node applicable to the composite structure of the string suspension according to claim 6 is characterized by: In the above-mentioned integrated node, the brace member is welded to the upper part of the node, the cable is connected to the node ear plate pin, and the hanger member is threadedly connected to the lower part of the integrated node. However, the top of the hanger adopts a ball joint. Therefore, the connection between the brace and the cable and the hanger is hinged, which meets the calculation assumptions and meets the structural design requirements.

9. The construction method of the integrated node applicable to the composite structure of string suspension according to claim 6, characterized in that: The integrated node should be assembled and welded with the struts first during the ground construction phase, and then the hanger ball joint should be screwed into the lower part of the node, and then installed into place at high altitude together with the struts. In the air, only the pins between each cable and the node ear plate need to be installed to complete the node installation.

Images