CN115977260A - L-shaped lug plate type anchoring connection device for stay cable structure and use method thereof - Google Patents

Abstract

The present invention is an L-shaped lug-plate anchoring connection device for cable-stayed structures; it includes a rigid structure and cables, wherein the rigid structure includes a node plate, an "L"-shaped stiffening plate, a transition column, a beam, and a variable-section section of a column and frame beams; among them, the gusset plate is composed of the lug plate of the cable and the web plate rigidly connected, and pin holes and tooling holes are set on the plate surface; the "L" shaped stiffener is composed of strip steel, which is used to The connection strength between the three gusset plates and reduce the weight of the node field; the transition beam is used to avoid stress concentration between the connection plate and the frame beam; the variable section of beam and column is used for the added structure when the size of the main structure and the node field are inconsistent Stress member. In the connection device proposed by the present invention, the main structure of the node is assembled and welded in the factory, and bored to ensure the concentricity of the pin shaft holes of the three plates. This not only ensures the welding quality of the main structure of the node, improves efficiency, but does not affect the force of the structure, and the installation speed of the node on site will also be greatly improved.

Description

L-shaped lug-type anchoring connection device for cable-stayed structure and its application method

technical field

The invention relates to the technical field of node construction of steel structure buildings, in particular to an L-shaped lug-plate anchor connection device for cable-stayed structures and its usage.

Background technique

Large-span space structure is one of the fastest-growing structure types at present, and its structural forms mainly include grid structure, reticulated shell structure, cable-membrane structure and thin shell structure. Among them, the cable-membrane structure usually uses flexible steel cables to generate a certain prestress in the membrane, thereby forming a structural system with a certain rigidity that can cover a large space. For the connection nodes of the cable-membrane structure, the anchor connection between the stay cable and the rigid structure is one of the key issues. The force transmission of the beam-cable anchorage structure is a relatively complicated area. If the design is not proper, the area is prone to stress concentration. , under the action of long-term static load and dynamic load, fatigue damage may occur.

Contents of the invention

The object of the present invention is to provide an L-shaped lug-type anchor connection device applied to stay cable structures. This lug-type anchor connection node is easy to prefabricate, easy to install, and the force transmission of the cable meets the force requirements.

In order to achieve the above object, the present invention is achieved in that:

An L-shaped lug anchor connection device for cable-stayed structures, including rigid structures and cables, wherein the rigid structures include gusset plates, "L"-shaped stiffeners, transition columns, beams, variable-section columns and frame beams; , the gusset plate is composed of the lug plate of the cable and the web plate rigidly connected, and pin holes and tooling holes are set on the plate surface; the "L" shaped stiffener is made of strip steel, which is used to strengthen the connection between the three gusset plates. The connection strength between them and reduce the weight of the node domain; the transition beam is used to avoid the stress concentration between the connecting plate and the frame beam; the beam and column with variable cross-section are used for the added structural force members when the main structure and the node domain are inconsistent in size.

The use method of the L-shaped lug type anchoring connection device for the stay cable structure,

Step 1. All connecting parts are processed in the factory in advance;

Step 2. After the size of the gusset plate is determined, it is necessary to process the pin hole and ensure the concentricity of the pin hole of the three plates;

Step 3. First weld the gusset plate and the "L" shaped stiffener;

Step 4, welding the transition beam and the connecting plate;

Step 5, welding the variable cross-section beam and the transition beam;

Step 6, welding the frame beam and the variable section beam;

Step 7. After the overall structure is installed, carry out cable anchorage and tension.

The invention provides a general-purpose cable lug type anchoring connection node which is easy to install and weld. A lug plate protrudes outward from a web plate of a rigid structure. The lugs are transferred to the webs of the rigid structure. The main structure of the node is assembled and welded in the factory, and bored to ensure the concentricity of the pin hole of the three plates. This not only ensures the welding quality of the main structure of the node, improves efficiency, but does not affect the force of the structure, and the installation speed of the node on site will also be greatly improved. The joint realizes the connection between the cable and the beam-column through the lug plate. In order to facilitate on-site installation and avoid stress concentration problems in the structure, the lug plate of the cable and the web plate of the rigid structure are considered as an integral gusset plate. Weld the factory spliced and welded complete connector ends to the structural beams. This connection structure can solve the problem of smooth force transmission of the cable, and directly transmit the cable force of the cable to the main structural beam through the connecting piece.

Description of drawings

FIG. 1 is a schematic structural diagram of a gusset plate in the connecting device.

Fig. 2 is a structural schematic diagram of an "L"-shaped stiffening plate in the connecting device.

Fig. 3 is a structural schematic diagram of transitional beams and columns in the connecting device.

Fig. 4 is a structural schematic diagram of beams and columns with variable cross-sections in the connecting device.

Fig. 5 is a structural schematic diagram of frame beams and columns in the connecting device.

Fig. 6 is a diagram of the node assembly process in the connecting device.

Detailed ways

The present invention is further illustrated below by specific examples.

As shown in Figures 1 to 6, an L-shaped lug-type anchoring connection device for cable-stayed structures includes a rigid structure and cables, wherein the rigid structure includes a gusset plate, an "L"-shaped stiffening plate, a transition column, Beams, columns with variable cross-sections and frame beams; among them, the gusset plate is composed of the lug plate of the cable and the web plate rigidly connected, and pin holes and tooling holes are set on the plate surface; the "L" shaped stiffener is a bar steel Composition, which is used to strengthen the connection strength between the three gusset plates and reduce the weight of the node domain; the transition beam is used to avoid stress concentration between the connection plate and the frame beam; Structural stress members added due to inconsistency in size.

The use method of the L-shaped lug type anchoring connection device for the stay cable structure,

Step 1. All connecting parts are processed in the factory in advance;

Step 2. After the size of the gusset plate is determined, it is necessary to process the pin hole and ensure the concentricity of the pin hole of the three plates;

Step 3. First weld the gusset plate and the "L" shaped stiffener;

Step 4, welding the transition beam and the connecting plate;

Step 5, welding the variable cross-section beam and the transition beam;

Step 6, welding the frame beam and the variable section beam;

Step 7. After the overall structure is installed, carry out cable anchorage and tension.

For now, there are relatively few types of large-size lug anchorage joints, and this connecting device provides convenience for the application and promotion of stay cables in column corner joints of long-span multi-storey steel frame structures. This kind of connection device not only ensures the structural strength of the beam and column itself, but also solves the problem of connection between the cable body and the structural components, ensuring the stability of the nodes. The force transmission path meets the force requirements: the cable force is transmitted to the pin shaft through the anchor head, the pin shaft is transmitted to the gusset plate through the pin shaft hole, and the gusset plate is transmitted to the main structure through the connecting weld.

The present invention comprehensively considers the above factors, the main structure of the node is assembled and welded in the factory, and bored to ensure the concentricity of the pin holes of the three plates. This not only ensures the welding quality of the main structure of the node, improves efficiency, but does not affect the force of the structure, and the installation speed of the node on site will also be greatly improved. The joint realizes the connection between the cable and the beam-column through the lug plate. In order to facilitate on-site installation and avoid stress concentration problems in the structure, it is considered to use the connecting plate of the cable and the web of the structural beam as an integral gusset plate. The factory splicing and welding the complete connector end is welded with the structural beam to solve the force transmission of the cable. Transfers the cable forces of the stay cables to the structural beams through the connectors.

Claims (2)

1. An L-shaped lug type anchoring connection device for cable-stayed cable structure is characterized in that: comprise rigid structure and cable, wherein, rigid structure comprises gusset plate, " L " shape stiffening plate, transition column, beam, column Variable section and frame beam; the number and angle of cables are determined according to the design and connected with the reserved holes of the rigid structure through the pin shaft, and the components of the rigid structure are processed in the factory by welding. 2. The using method of the L-shaped lug type anchor connection device for the stay cable structure according to claim 1, characterized in that: Step 1. All connecting parts are processed in the factory in advance; Step 2. After the size of the gusset plate is determined, it is necessary to process the pin hole and ensure the concentricity of the pin hole of the three plates; Step 3. First weld the gusset plate and the "L" shaped stiffener; Step 4, welding the transition beam and the connecting plate; Step 5, welding the variable cross-section beam and the transition beam; Step 6, welding the frame beam and the variable section beam; Step 7. After the overall structure is installed, carry out cable anchorage and tension.

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