Reinforcing device of assembly type rigidity-adjustable substructure

Abstract

The invention discloses an assembly type rigidity-adjustable substructure reinforcing device which is composed of a plurality of rigidity-adjustable substructures, and each substructure comprises a modular component and a rigidity-variable connecting piece. The modular component is formed by assembling standard rod pieces and detachable nodes through connecting bolts, and extensible grid units are formed. The variable-stiffness connecting piece automatically adjusts stiffness parameters based on real-time stress response of a to-be-reinforced structure and is hinged to the substructures and the to-be-reinforced structure through connecting lug plates; the substructures are distributed along the weak area of the structure to be reinforced to form a multi-stage rigidity regulation and control system, and the upper layer substructure is rigidly connected with the end part of the standard rod piece of the lower layer substructure through a detachable node. Structural response is effectively reduced by means of the modular components and the variable-stiffness connecting pieces, the load self-adaptive capacity is achieved, meanwhile, the characteristics of convenient and fast construction and intelligent operation and maintenance are achieved, and the method is suitable for existing structure reinforcement and preventive strengthening engineering of a newly-built structure.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure reinforcement, and specifically to a reinforcement device for an assembled sub-structure with adjustable stiffness. Background Art

[0002] As the core weighing system of large-span space structures such as airport terminals and public stadiums, they are long-term subjected to the combined action of dynamic loads such as wind, snow, and earthquake. With the increase of service life and the frequent occurrence of extreme climate events, existing large-span space lattice structures generally face the problems of bearing capacity degradation and increased risk of collapse.

[0003] Currently, there are various reinforcement methods for lattice structures and corresponding specifications have been formed, including the reinforcement of key nodes, key members, and the overall structure. However, they all have different degrees of defects, specifically manifested as:

[0004] (1) Imbalance of dynamic equilibrium in the passive reinforcement system: Common reinforcement methods such as changing the upper load of the structure, increasing or decreasing structural units are likely to cause internal force redistribution of the structure. Although the method of increasing the cross-section can improve the static bearing capacity of the structure, its stiffness mode is fixed and cannot respond to time-varying loads and sudden overloads;

[0005] (2) Co-deterioration of the additional sub-structure system and the original structure: Existing reinforcement methods for additional sub-structures, such as the external prestressing method, mostly use rigid connection nodes, resulting in strong mechanical coupling between the additional sub-structure and the original structure, which is likely to change the stress state of the members of the in-service lattice structure (the tension and compression of the members change signs). At the same time, as an important boundary condition of the structure, improper reinforcement schemes are likely to change the force form of the supports;

[0006] (3) Insufficient integration of construction control: Traditional reinforcement methods are likely to cause disturbances to the original structure, resulting in the transition of the stress state of the structure before and after reinforcement construction.

[0007] In view of the above problems, it is very necessary to invent a reinforcement device with adjustable stiffness, high integration, and convenient construction. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems existing in the above technology, and to propose a reinforcement device for an assembled sub-structure with adjustable stiffness.

[0009] To achieve the above object, the present invention provides the following technical solutions: A reinforcement device for an assembled substructure with adjustable stiffness, belonging to the technical field of steel structure reinforcement, characterized in that it includes: a detachable joint, a connecting bolt, a standard member, a connecting ear plate, a variable stiffness connector, and a structure to be reinforced; the reinforcement device is composed of several substructures with adjustable stiffness, and each substructure includes modular components and variable stiffness connectors; the modular components are assembled by standard members and detachable joints through connecting bolts to form an expandable grid unit; the variable stiffness connector adjusts the stiffness parameters based on the real-time force response of the structure to be reinforced, and is hinged to the substructure and the structure to be reinforced through connecting ear plates respectively; the substructures are distributed along the weak areas of the structure to be reinforced to form a multi-level stiffness control system, where the bottom layer of the substructure is fixed to the foundation through an anchoring device, and the upper-layer substructures are rigidly connected to the ends of the standard members of the lower-layer substructures through detachable joints.

[0010] Preferably, in the above reinforcement device for an assembled substructure with adjustable stiffness, the detachable joint is welded by a spherical joint and a short member. The connection between the connecting bolt and the standard member is realized by using a sleeve method, and adjustment holes are reserved to adapt to assembly errors. The standard member can be a circular tube or a square tube.

[0011] Based on the above technical features, the detachable spherical joint provides extremely high construction convenience, the standardized member configuration improves production efficiency, reduces construction difficulty at the same time, and is easy to realize assembly.

[0012] Preferably, in the above reinforcement device for an assembled substructure with adjustable stiffness, the connecting ear plate is welded to the end of the detachable joint and is hinged to the variable stiffness connector through a pin shaft to form a force transmission path.

[0013] Based on the above technical features, the hinged setting of the variable stiffness connector realizes the weak mechanical coupling between the assembled structure reinforcement device and the original structure, reducing the internal force redistribution of the original structure.

[0014] Preferably, in the above reinforcement device for an assembled substructure with adjustable stiffness, the variable stiffness connector includes a stiffness adjustment member, a pressurizing hole, a protection member, and a connecting plate; the stiffness adjustment member adds gas through the pressurizing hole according to the stress, strain or displacement data of the structure to be reinforced to dynamically adjust the stiffness of the variable stiffness connector, changing the geometric parameters or material stiffness characteristics of the connector. The rigid protection member plays a role in protecting and fixing the stiffness adjustment member, and the variable stiffness connector is connected to the structure to be reinforced and the substructure through the connecting plates at both ends.

[0015] Based on the above technical features, the assembled structure reinforcement device can achieve adjustable reinforcement stiffness, enhance the load adaptability of the structure, and make it have load self-adaptive ability.

[0016] Preferably, in the above-mentioned reinforcement device for an assembled stiffness-adjustable substructure, the structure to be reinforced can be a curved surface grid structure or a planar grid structure; the grid unit of the modular component is a triangular, quadrilateral or polygonal topological structure, and modular expansion is achieved by increasing or decreasing standard members and detachable joints to adapt to the geometric shapes of different structures to be reinforced.

[0017] Based on the above technical features, the application flexibility of the assembled reinforcement device is enhanced.

[0018] Preferably, in the above-mentioned reinforcement device for an assembled stiffness-adjustable substructure, the construction method of the assembled structure reinforcement device is characterized by including the following steps: S1. Identify the weak areas of the structure to be reinforced and determine the layout level and density of the substructures; S2. Prefabricate modular components in the factory and assemble them into substructures through connecting bolts and detachable joints; S3. Fix the bottom-layer substructure to the foundation through an anchoring device; S4. Install the upper-layer substructures layer by layer and connect them to the ends of the standard members of the lower-layer substructures through detachable joints; S5. Hinge the variable-stiffness connectors to the substructures and the structure to be reinforced respectively through connecting ear plates.

[0019] Based on the above technical features, the transition of the force-bearing state of the original structure during construction is avoided.

[0020] Preferably, in the above-mentioned reinforcement device for an assembled stiffness-adjustable substructure, it is applicable to the reinforcement of existing reticulated shell structures or the preventive strengthening projects of new structures, reduces the structural dynamic response through the adaptive adjustment function of modular components and variable-stiffness connectors, and has the capabilities of rapid construction assembly and intelligent operation and maintenance.

[0021] Based on the above technical features, this reinforcement method can be applied to the reinforcement and transformation process of existing large-span space structures. Beneficial effects

[0022] The beneficial effects of the present invention are as follows:

[0023] Compared with the traditional reinforcement forms of reticulated shell structures, the present invention dynamically adjusts the stiffness parameters based on the real-time force response of the structure to be reinforced, can effectively reduce the structural dynamic response, and improve the anti-collapse ability of existing reticulated shell structures. Different from the reinforcement of key joints and members, the present invention can dynamically adjust the internal force distribution of the structure, and at the same time minimize the phenomenon of internal force redistribution to better cope with the time-varying loads and sudden overloads borne by the structure, and has the load self-adaptive ability. It can minimize the disturbance to the original structure to the greatest extent and avoid the tension and compression sign changes of key load-bearing members. It can maintain the force-bearing state of the original structure supports and avoid support disturbances. It can improve the construction efficiency and construction standards through the assembly of modular members and joints. It can achieve the intelligent level of construction operation and maintenance. It can avoid the transition of the force-bearing state before and after the structure construction. Description of the Drawings

[0024] Figure 1 Reinforcement device for assembled stiffness - adjustable sub - structure;

[0025] Figure 2 Disassembly drawing of the connection between detachable node and standard member;

[0026] Figure 3 Schematic diagram of the connection between detachable node and standard member;

[0027] Figure 4 Schematic diagram of the connection between detachable node with square - tube section and standard member;

[0028] Figure 5 Detailed disassembly drawing of variable - stiffness connecting piece;

[0029] Figure 6 Schematic diagram of variable - stiffness connecting piece;

[0030] Figure 7 Detailed drawing of modular component;

[0031] Figure 8 Schematic diagram of sub - structure;

[0032] Figure 9 Detailed drawing of the connection between sub - structure and structure to be reinforced;

[0033] Figure 10 Overall reinforcement effect diagram.

[0034] In the figure, 1. Detachable node, 2. Connecting bolt, 3. Standard member, 4. Connecting ear plate, 5. Variable - stiffness connecting piece, 6. Structure to be reinforced, 7. Sub - structure, 8. Modular component, 9. Anchoring device, 10. Foundation, 11. Spherical node, 12. Short member, 13. Adjusting hole, 14. Pin shaft, 15. Stiffness adjusting piece, 16. Pressurizing hole, 17. Protective piece, 18. Connecting plate. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0038] As Figure 1 shown, this embodiment is a reinforcement device for an assembled substructure with adjustable stiffness, including a detachable joint (1), a connecting bolt (2), a standard member (3), a connecting ear plate (4), a variable stiffness connecting member (5), and a structure to be reinforced (6); the reinforcement device is composed of several substructures (7) with adjustable stiffness, and each substructure (7) includes a modular component (8) and a variable stiffness connecting member (5); the modular component (8) is assembled by the standard member (3) and the detachable joint (1) through the connecting bolt (2) to form an expandable grid unit; the variable stiffness connecting member (5) adjusts the stiffness parameters based on the real-time force response of the structure to be reinforced (6), and is hinged to the substructure (7) and the structure to be reinforced (6) respectively through the connecting ear plate (4); the substructures (7) are distributed along the weak areas of the structure to be reinforced (6) to form a multi-level stiffness control system, where the bottom layer of the substructure (7) is fixed to the foundation (10) through an anchoring device (9), and the upper substructure (7) is rigidly connected to the end of the standard member (3) of the lower substructure (7) through the detachable joint (1).

[0039] As Figure 2 shown, in this embodiment, the detachable joint (1) is welded by a spherical joint (11) and a short member (12). The connection between the connecting bolt (2) and the standard member (3) is achieved by using a sleeve, and an adjustment hole (13) is reserved to accommodate assembly errors. The standard member (3) can be a circular tube or a square tube, as Figure 3 and Figure 4 shown.

[0040] As Figure 2As shown, in this embodiment, the connecting ear plate (4) is welded to the end of the detachable node (1) and is hinged to the variable stiffness connector (5) through a pin shaft (14) to form a force transmission path.

[0041] As Figure 5 shown, in this embodiment, the variable stiffness connector (5) includes a stiffness adjustment member (15), a pressurizing hole (16), a protective member (17), and a connecting plate (18); the stiffness adjustment member (15) adds gas through the pressurizing hole (16) according to the stress, strain, or displacement data of the structure to be strengthened (6) to dynamically adjust the stiffness of the variable stiffness connector, and change the geometric parameters or material stiffness characteristics of the connector. The rigid protective member (17) plays a role in protecting and fixing the stiffness adjustment member (15), and the variable stiffness connector (5) is connected to the structure to be strengthened (6) and the sub-structure (7) through the connecting plates (18) at both ends.

[0042] As Figure 7 and Figure 8 shown, in this embodiment, the structure to be strengthened (6) can be a curved surface grid structure or a planar grid structure. The grid unit of the modular component (8) is a topological structure of three rods, four rods, or multiple rods, and modular expansion is achieved by adding or reducing standard rods (3) and detachable nodes (1) to adapt to the geometric forms of different structures to be strengthened (6).

[0043] As Figure 9 shown, the construction method of the prefabricated structure strengthening device in this embodiment includes the following steps: S1. Identify the weak areas of the structure to be strengthened (6), and determine the layout level and density of the sub-structure (7); S2. Prefabricate the modular component (8) in the factory, and assemble it with the detachable node (1) through the connecting bolt (2) to form the sub-structure (7); S3. Fix the bottom sub-structure (7) to the foundation (10) through the anchoring device (9); S4. Install the upper sub-structures (7) layer by layer, and connect the ends of the standard rods (3) of the lower sub-structure (7) through the detachable nodes (1); S5. Hinge the variable stiffness connector (5) to the sub-structure (7) and the structure to be strengthened (6) respectively through the connecting ear plate (4);

[0044] As Figure 10 shown, the prefabricated structure strengthening device in this embodiment is applicable to the strengthening of existing reticulated shell structures or preventive strengthening projects of new structures, reduces the structural dynamic response through the adaptive adjustment functions of the modular component (8) and the variable stiffness connector (5), and has the capabilities of rapid construction assembly and intelligent operation and maintenance.

[0045] In this embodiment, the prefabricated structure reinforcement device has load self-adaptive ability. Its modular composition facilitates factory prefabrication and the construction process, minimizes the disturbance to the original structure to the greatest extent, and at the same time enables intelligent construction control and operation and maintenance. Considering the randomness and complexity of the load on the original structure during its service process, the adjustable stiffness connection can adapt to the time-varying load characteristics, avoiding the redistribution of structural internal forces and the disturbance of supports. The design of modular members and connectors greatly improves the construction efficiency and broadens the application scope, and can be widely applied and popularized.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims of this specification and their full scope and equivalents.

Claims

1. A reinforcement device for an assembled substructure with adjustable stiffness, characterized in that The reinforcement device is composed of several sub-structures (7) with adjustable stiffness. Each sub-structure (7) includes modular components (8) and variable-stiffness connectors (5); the modular components (8) are assembled by standard rods (3) and detachable joints (1) through connecting bolts (2) to form an expandable grid unit; the variable-stiffness connectors (5) adjust the stiffness parameters based on the real-time force response of the structure to be reinforced (6), and are hinged to the sub-structure (7) and the structure to be reinforced (6) respectively through connecting ear plates (4); the sub-structures (7) are distributed along the weak areas of the structure to be reinforced (6) to form a multi-level stiffness control system; among them, the bottom layer of the sub-structure (7) is fixed to the foundation (10) through an anchoring device (9), and the upper sub-structures (7) are rigidly connected to the ends of the standard rods (3) of the lower sub-structures (7) through detachable joints (1).

2. The reinforcement device for the assembled stiffness-adjustable substructure according to claim 1, wherein: The detachable joint (1) is welded by a spherical joint (11) and a short rod (12); the connecting bolt (2) is connected to the standard rod (3) in a sleeve way, and an adjustment hole (13) is reserved to adapt to the assembly error; the standard rod (3) is a round tube or a square tube.

3. The reinforcement device for the assembled stiffness-adjustable substructure according to claim 1, characterized in that: The connecting ear plate (4) is welded to the end of the detachable joint (1) and is hinged to the variable-stiffness connector (5) through a pin shaft (14) to form a force transmission path.

4. The reinforcement device for the assembled stiffness-adjustable substructure according to claim 1, characterized in that: The variable-stiffness connector (5) includes a stiffness adjustment member (15), a pressurizing hole (16), a protective member (17) and a connecting plate (18); the stiffness adjustment member (15) adds gas through the pressurizing hole (16) according to the stress, strain or displacement data of the structure to be reinforced (6) to dynamically adjust the stiffness of the variable-stiffness connector, and changes the geometric parameters or material stiffness characteristics of the connector; the rigid protective member (17) plays a role in protecting and fixing the stiffness adjustment member (15), and the variable-stiffness connector (5) is connected to the structure to be reinforced (6) and the sub-structure (7) through the connecting plates (18) at both ends.

5. The reinforcement device for the prefabricated stiffness-adjustable substructure according to claim 1, characterized in that: The structure to be reinforced (6) is a curved surface grid structure or a plane grid structure; the grid unit of the modular component (8) is a topological structure of three rods, four rods or multiple rods, and modular expansion is realized by increasing or decreasing the standard rods (3) and detachable joints (1) to adapt to the geometric shapes of different structures to be reinforced (6).

6. A construction method of a reinforcement device for the prefabricated stiffness-adjustable substructure according to any one of claims 1-5, characterized in that It includes the following steps: S1. Identify the weak areas of the structure to be reinforced (6), and determine the layout level and density of the sub-structures (7); S2. Prefabricate the modular components (8) in the factory and assemble them into sub-structures (7) through connecting bolts (2); S3. Fix the bottom-layer sub-structure (7) to the foundation (10) through the anchoring device (9); S4. Install the upper-layer sub-structures (7) layer by layer and connect them to the ends of the standard rods (3) of the lower-layer sub-structures (7) through detachable joints (1); S5. Hinge the variable-stiffness connectors (5) to the sub-structure (7) and the structure to be reinforced (6) respectively through the connecting ear plates (4).

7. The reinforcement device for the assembled stiffness adjustable sub-structure according to any one of claims 1-5, characterized in that, It is applicable to the preventive strengthening projects of existing structures or newly built structures. The dynamic response of the structure is reduced through the adaptive adjustment function of modular components (8) and variable stiffness connectors (5), and it has the capabilities of rapid construction assembly and intelligent operation and maintenance.

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