CN113463754B - Assembled branched cable-supported prestressed column suitable for multi-angle connections - Google Patents

Abstract

The invention discloses an assembled branch type cable-supported prestressed column suitable for multi-angle connection, comprising a square center column, a brace-center column connection node, a brace extension end node, a brace and a prestressed steel cable ; There are two strut-central column connection nodes, which are set on the upper and lower parts of the square central column, and are detachably connected with the square central column; there are four strut-extending end nodes; the upper strut-center The four sides of the column connection node are detachably connected to one end of the four upper struts through the first connecting piece, and the other end of the upper strut is connected to the upper part of the four struts' extended end nodes; the lower strut-center The four sides of the column connection node are detachably connected to one end of the four lower struts through the second connecting piece, and the lower support rod is connected to the lower part of the four struts' extended end nodes; the four struts' extended end nodes The top and bottom are respectively connected to the top and bottom of the square central column through prestressed steel cables.

Description

Assembled branched cable-supported prestressed column suitable for multi-angle connections

technical field

The invention relates to the field of construction engineering, in particular to an assembled branch type cable-supported prestressed column suitable for multi-angle connection.

Background technique

Cable-supported prestressed column is a prestressed steel structure system with high rigidity and good material utilization. buckling capacity. The slender cables also give the cable-supported column a light appearance, enriching its architectural expression.

At present, the struts and central columns in prestressed columns are mostly connected by on-site direct welding, but the traditional welding method has many disadvantages, such as complex on-site construction, space occupied by transportation and storage, etc., and welding residual stress also affects the stability of the structure. Performance is adversely affected. In addition, the angles between the struts of the branched cable-supported prestressed columns and the central column sometimes need to be designed at different angles, and the connecting nodes also need to be designed and processed separately.

In the patent with the patent application number CN 202010421705, a connection node of the stretched end of the strut suitable for bifurcated prestressed strut columns is disclosed. There are three problems in this patent:

1. This patent only provides the connection node form for connecting the stay cable and the extended end of the strut, and lacks the connection node form between the stay bar and the center column, the center column and the stay cable, which is not enough to complete a complete branch cable Prefabricated connections for supporting prestressed columns.

2. The outrigger node in this patent is not an independent part but assembled by three parts. It needs multi-step connection with bolts, which has the disadvantages of many parts, cumbersome installation steps, and long construction time on site.

3. In this patent, the connection between the outrigger end node and the strut is hinged, and the force is simple and clear. From a structural point of view, the higher the rigidity of the connection between the components, the stronger the ability to restrain each other, and the greater the improvement in the load-bearing capacity of the cable-supported prestressed column structure. However, this patent uses hinges with relatively poor restraint capabilities. However, there is still room for improvement in the rigidity of the connecting nodes.

Contents of the invention

The purpose of the present invention is to develop an assembled joint of branched cable-supported prestressed columns that can be installed at multiple angles, so that the connection nodes of branched cable-supported prestressed columns have modular production, quick installation, and meet various angle designs, etc. advantage.

The technical scheme adopted for the purpose of realizing the patent of the present invention is as follows:

Prefabricated branched cable-supported prestressed columns suitable for multi-angle connections, including square center columns, brace-center column connection nodes, brace extension end nodes, upper braces, lower braces, and upper prestressed steel cables and lower prestressed steel cables;

The strut-central column connection nodes include two, which are set on the upper and lower parts of the square central column, and are detachably connected with the square central column; the strut-extending end nodes include four;

The four sides of the upper strut-central column connection node are detachably connected to one end of the four upper struts through the first connecting piece, and the other end of the upper strut is connected to the upper part of the four strut extension end nodes;

The four sides of the lower strut-central column connection node are detachably connected to one end of the four lower struts through the second connecting piece, and the lower struts are connected to the lower parts of the four struts' extended end nodes;

The tops of the four extended end nodes of the struts are connected with the top side of the square central column through the upper prestressed steel cables; the bottoms of the four extended end nodes of the four struts are connected with the bottom side of the square central column through the lower prestressed steel cables.

As a further technical solution, the strut-central column connection node includes a square sleeve set up vertically, and an open-type outrigger connecting arm is arranged on each of the four sides of the sleeve. There are bolt holes above and below.

Further, the open-type extended connecting arm includes a horizontally arranged diaphragm baffle and two arc-shaped baffles connected to the transverse diaphragm and perpendicular to the transverse diaphragm, the two arc-shaped baffles The spacing distance is the width of the outer diameter of the section of the strut, and each arc-shaped baffle is provided with four bolt holes, and the connecting lines between the centers of the four bolt holes form a parallelogram.

Further, the arc-shaped baffle of the outrigger of the strut-central column node is connected to the strut via a one-way self-locking bolt, and the angle between the strut and the central column is determined according to design requirements.

Further, the four outstretched end nodes of the struts are located on the same horizontal plane, and the four outstretched end nodes of the struts are arranged at equal intervals around the circumference of the central column.

Further, the outstretched end node of the strut includes a vertically arranged square cylinder and a connecting arm arranged on the outer side of the square cylinder, and the connecting arm is composed of four arc-shaped steel plates and a horizontal support plate, wherein the arc The curved steel plates are divided into two groups, arranged longitudinally along the square tube, and the distance between them is the width of the outer diameter of the cross-section of the strut. Each arc-shaped steel plate is provided with bolt holes symmetrically distributed along the direction of 45°; the horizontal support plate is perpendicular to the square The tube is longitudinally and horizontally separated between two sets of arc-shaped steel plates; the top and bottom of the square tube are welded with first ear plates.

Further, the arc-shaped steel plate is connected with the upper strut and the lower strut by a one-way self-locking bolt. The beneficial effects of the patent of the present invention are:

1. The present invention proposes an assembled branched cable-supported prestressed column suitable for multi-angle connection, which includes two types of assembled connection nodes: strut and central column, and strut and cable. These two nodes and other components A complete assembly-type branch cable-supported prestressed column connection scheme has been formed; this connection can effectively provide lateral support for the central column, prevent the instability of the central column, and greatly improve the buckling load capacity of the bearing column. Save steel consumption. Branched struts provide more stable lateral support than no struts or horizontal struts.

2. The outrigger end nodes and strut-central column nodes of the present invention can be prefabricated and modularized in the factory, and at the same time the nodes themselves do not need to be assembled at the construction site, and can be directly connected by self-locking one-way bolts. The main components (central column, strut, cable) are connected to reduce the workload on the construction site. Avoid on-site welding and the influence of residual stress caused by the welding process, while simplifying construction steps and increasing construction efficiency.

3. The strut-central column connection node and the strut extension end node of the present invention can be applied to branched cable-supported prestressed columns of various angles, and the same node can be used to connect designs of different angles, which improves the application of the nodes The universality meets a variety of typical design and use requirements. Furthermore, combined with the angle optimization design of the branched cable-supported prestressed column, the performance of the steel can be fully utilized.

4. The outrigger end node and the strut-central column node of the present invention are integrally formed or welded; therefore, they all have high node stiffness, and the overall node is semi-rigid, which can transmit both axial force and bending moment. The connection between the components has a high integrity, and the restraint capacity between the components is stronger than that of the hinge joints, so that the cable-supported prestressed column has a higher overall bearing capacity.

Description of drawings

Fig. 1 is a schematic diagram of upper strut-central column connection node;

Fig. 2 is a schematic diagram of the state of cooperation between the upper strut-central column connection node and the central column;

Figure 3 is a schematic diagram of the connection node between the lower strut and the central column;

Figure 4 is a schematic diagram of the cooperation state between the lower strut-central column connection node and the central column;

Fig. 5 is a schematic diagram of the outrigger end node;

Fig. 6 is the structural representation of square central column;

Figure 7 is the overall assembly diagram, the strut is inclined at 30°;

Figure 8 is the overall assembly diagram, the strut is inclined at 60°;

In the figure: 1 strut-central column connection node; 1-1 arc-shaped baffle, 1-2 diaphragm baffle, 1-3 square tube;

2. Protruding end nodes of struts; 2-1 square tube, 2-2 horizontal support plate, 2-3 arc-shaped steel plate, 2-4 first ear plate;

3 square central column; 3-1 second ear plate;

4-1 upper strut; 4-2 lower strut;

5-1 Upper prestressed steel cables; 5-2 Lower prestressed steel cables;

6 one-way self-locking bolts;

7 ordinary bolts.

Detailed ways

The patent of the present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject matter of the patent of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of the patent of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the scope of protection of the patent of the present invention.

Example 1 (the angle between the pole and the horizontal is 30°):

As shown in Figure 7, this embodiment discloses a set of brace-central column connection nodes and extension end connection nodes suitable for branched cable-supported prestressed columns, including square central column 3, brace-central column connection nodes 1. Extended end nodes of struts 2, upper struts 4-1, lower struts 4-2, upper prestressed steel cables 5-1 and lower prestressed steel cables 5-2; braces-central column connection The node 1 includes two, which are set on the upper and lower parts of the square central column 3 and fixed on the square central column 3; the outrigger end nodes 2 include four; The two sides are connected to the upper part of the four strut extension end nodes 2 through the upper strut 4-1, and the four sides of the lower strut-central column connection node 1 are connected to the four outer struts through the lower strut 4-1. The lower part of the extension node 2 is connected; at the same time, the top of the four brace extension end nodes 2 is connected to the top side of the square central column 3 through the upper prestressed steel cable 5-1; the bottom of the four brace extension end nodes 2 passes through The lower prestressed steel cable 5-1 is connected to the bottom side of the square center column 3 .

The above-mentioned device includes two types of prefabricated connection nodes: struts and central columns, and struts and cables. These two nodes and other components form a complete assembly-type branch-type cable-supported prestressed column connection scheme; this connection can Effectively provide lateral support for the central column, prevent the instability of the central column, greatly improve the buckling load capacity of the bearing column, and save the amount of steel. Branched struts provide more stable lateral support than no struts or horizontal struts.

Strut-central column connection node 1 and strut extension end node 2 are prefabricated parts, which can be prefabricated and modularized in the factory. At the same time, the nodes themselves do not need to be assembled at the construction site, and self-locking type can be used directly. The one-way bolts connect the main components (central column, strut, cable) to reduce the workload on the construction site. Avoid on-site welding and the influence of residual stress caused by the welding process, while simplifying construction steps and increasing construction efficiency.

Further, each component of the strut-central column connection node 1 and the strut outrigger end node 2 can be welded together in advance, or integrally formed.

Referring to Fig. 6, the top and the bottom of the square central column 3 are provided with second lugs 3-1 for the connection of the prestressed steel cables; on the four sides of the top of the square central column 3, each side There is a second ear plate on the top; on the four sides of the bottom of the square central column 3, a second ear plate is provided on each side, and the four upper second ear plates are connected with four upper prestressed steel plates by bolts. The stay cables 5-1 are connected, and the four lower second ear plates are connected with the four lower prestressed steel stay cables 5-2 through bolts.

As shown in Figure 7, a group of bolt holes are respectively arranged at 1/3 and 2/3 of the height of the square central column 3, and each side of the central column 3 has 8 bolt holes, which serve as the upper side and the upper side of the central column respectively. The connection node position on the lower side; set the first strut-central column connection node 1 at the bolt hole at the 2/3 height of the central column with the diaphragm baffle on the top and the arc-shaped baffle on the bottom. Fix it with one-way bolts; set the second strut-central column connection node 11 at the bolt hole of 1/3 height of the central column with the diaphragm baffle on the bottom and the arc-shaped baffle on the top. A one-way bolt holds it in place.

Wherein as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, the structures of the first strut-central column connecting node and the second strut-central column connecting node are the same; each strut-central column node 1 includes square The tube 1-3 is welded with a connector on the four sides of the square tube 1-3, and each connector includes a diaphragm baffle 1-2 and two connecting parts connected to the side of the diaphragm 1-2. Two arc-shaped baffles 1-1 are provided with four bolt holes on the two arc-shaped baffles 1-1, and the two arc-shaped baffles 1-1 are perpendicular to the diaphragm 1-2. Wherein the connecting piece is arranged at the side center position of the square pipe 1-3, and connecting holes are also arranged on the square pipe 1-3 above and below the connecting piece.

Further, the bolt holes of the arc-shaped baffle 1-1 are used to connect the struts; according to the angle requirements of the design, the drilling positions at both ends of the upper struts are determined and four bolt holes are arranged, and the inner parts of the four upper struts are The ends are respectively placed in the corresponding bolt holes of the arc-shaped baffle of the first strut-central column node, and fixed by one-way bolts; according to the angle requirements of the design, the drilling positions at both ends of the lower strut are determined and the bolt holes are arranged. The inner ends of the four lower struts are placed in the corresponding bolt holes of the arc-shaped baffle of the second strut-central column node, and fixed by one-way bolts.

The structure of the outstretched end node 2 of the strut is as shown in Figure 5; it includes a vertically arranged square tube 2-1, and a horizontal support plate 2-2 is provided on one side of the square tube 2-1, and the horizontal support plate The top surface and the bottom surface of 2-2 are each symmetrically provided with two arc-shaped steel plates 2-3, and the two arc-shaped steel plates 2-3 are perpendicular to the horizontal support plate 2-2; Bolt holes are provided on -3; two first ear plates 2-4 are also symmetrically arranged on the top and bottom surfaces of the square tube 2-1, and bolt holes are also provided on the first ear plates 2-4 The arc-shaped steel plate 2-3 on the top surface of the horizontal support plate 2-2 is used to connect the upper strut 4-1; the arc-shaped steel plate on the bottom surface of the horizontal support plate 2-2 is used to connect the lower strut 4-2; The first ear plate 2-4 on the top surface of the square tube is connected to one end of the upper prestressed steel cable 5-1 by bolts, and the other end of the upper prestressed steel cable 5-1 is connected to the first ear plate on the top of the center column Connected; the ear plate located on the bottom surface of the square tube is connected to one end of the lower prestressed steel cable 5-2 by bolts; the other end of the lower prestressed steel cable 5-2 is connected to the second ear plate at the bottom of the central column.

The above-mentioned strut extension end nodes 2 are arranged at the height of 1/2 of the central column, and the four strut extension end nodes 2 located on the same horizontal plane are arranged at equal intervals around the circumference of the central column, so that the strut extension ends The distance between the node 2 and the central column 401 is about 0.286 times the height of the central column (according to the design requirement, the angle between the strut and the horizontal is 30°). The outrigger end node 2 of each said strut overlaps the outer end of the upper strut between the upper arc-shaped steel plates of the outrigger, and the bolt holes are aligned and fixed by one-way bolts. Lap the outer ends of the lower struts between the lower arc-shaped steel plates of the outriggers, align the bolt holes and fix them with one-way bolts.

The outrigger end nodes of the struts in the present invention can be applied to branched cable-supported prestressed columns of various angles, and the same node can be used to connect designs of different angles, which improves the universality of node applications and satisfies various Typical design and usage requirements. Furthermore, combined with the angle optimization design of the branched cable-supported prestressed column, the performance of the steel can be fully utilized.

The specific installation method is as follows:

When installing, first set up the two struts-central column nodes according to the requirements and place them at 1/3 and 2/3 heights of the central column, and connect and fix them with one-way bolts; The upper struts are respectively lapped at the outriggers on the four sides of the upper node, so that the angle between the struts and the horizontal is 30°, and the other end protrudes obliquely downward and is lapped outside the struts in the corresponding direction. On the upper side of the outrigger of the extension node, the two ends of each strut are fixed with one-way bolts; At the position, the angle between the strut and the horizontal is 30°, and the other end protrudes obliquely upwards and overlaps the lower side of the outrigger at the end node of the strut in the corresponding direction. One-way bolts are used at both ends of each strut Fix; after that, weld the lugs on the four sides of the top and bottom of the center column respectively, and connect the lower ends of the four prestressed steel cables 5 to the lugs on the upper end faces of the four outstretched end nodes respectively, and the four After the prestressed steel cables are tightened, they are connected to the top lugs of the center column, and the upper ends of the four prestressed steel cables are respectively connected to the lugs on the lower end faces of the outstretched end nodes, and the four prestressed steel cables are tightened Afterwards, it is connected with the bottom ear plate of the central column.

Example 2 (the angle between the pole and the horizontal is 60°):

The main structure of this embodiment is the same as that of Embodiment 1, the difference is that in this embodiment, the angle between the lower strut and the horizontal plane is 60°. 0.0953 times the height, the length and hole position of each strut are determined by calculation, and other components and installation methods remain unchanged. It is beneficial to the prefabrication and modular production of each component of the cable-supported prestressed column, and reduces the cost.

Claims (5)

1. Assembled branched cable-supported prestressed columns suitable for multi-angle connections, including square central columns, outrigger end nodes, upper braces, lower braces, upper prestressed steel cables and lower prestressed steel cables cable; characterized in that it also includes a strut-central column connection node; the strut-central column connection node includes two, which are set on the upper and lower parts of the square central column, and are detachably connected with the square central column; The strut-extending end nodes include four; the four sides of the upper strut-central column connection node are detachably connected with one end of the four upper struts, and the other ends of the upper struts are connected with the four struts The upper connection of the outrigger end node; the four sides of the lower brace-central column connection node are detachably connected with one end of the four lower brace rods, and the lower support rod is connected with the lower part of the four brace rod extension end nodes ;The tops of the four outrigger end nodes are connected to the top side of the square center column through the upper prestressed steel cables; the bottom of the four outrigger end nodes are connected to the bottom side of the square center column through the lower prestressed steel cables ; The strut-central column connection node includes a square sleeve set up vertically, and an open outrigger connecting arm is arranged on each of the four sides of the square sleeve, and bolts are arranged above and below the open outrigger connecting arm hole; The open-type overhanging connecting arm includes a horizontally arranged diaphragm baffle and two arc-shaped baffles connected to the transverse diaphragm and perpendicular to the transverse diaphragm, and the distance between the two arc-shaped baffles is The width of the outer diameter of the bar section, each arc-shaped baffle is provided with four bolt holes, and the connecting lines of the centers of the four bolt holes form a parallelogram; The four outstretched end nodes of the struts are located on the same horizontal plane, and the four outstretched end nodes of the struts are arranged at equal intervals around the circumference of the central column; The outstretched end node of the strut includes a vertically arranged square cylinder and a connecting arm arranged on the outer side of the square cylinder. The connecting arm consists of four arc-shaped steel plates and a horizontal support plate, two of which are arc-shaped The steel plates are connected to the top of the horizontal support plate, and the other two are connected to the bottom of the horizontal support plate; four bolt holes are arranged on each of the arc-shaped steel plates, and the connecting lines of the centers of the four bolt holes form a parallelogram; Both the top and the bottom are welded with first ear plates. 2. The assembled branch type cable-supported prestressed column suitable for multi-angle connection as claimed in claim 1, wherein the arc-shaped baffle plate of the outrigger at the node of the strut-central column passes through a one-way self- The lock bolt is connected to the upper strut or the lower strut. 3. The assembled branch type cable-supported prestressed column suitable for multi-angle connection as claimed in claim 1, characterized in that, the connecting node of the strut-central column is a prefabricated part, and the diaphragm baffle and the circular The curved baffle is integrally formed or welded together. 4. The assembled branched cable-supported prestressed column suitable for multi-angle connection as claimed in claim 1, characterized in that, the outstretched end node of the strut is a prefabricated part, and the square tube and the connection The arms are integrally formed or welded together. 5. The assembled branched cable-supported prestressed column suitable for multi-angle connection according to claim 1, characterized in that, the arc-shaped steel plate is connected to the upper strut and the lower strut through a one-way self-locking bolt connected.

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