A distributed tuned inertial damper and control method for high-rise buildings based on double-layer curtain walls

Abstract

The present invention provides a distributed tuned inertial mass damper and control method for a high-rise building based on a double-skin curtain wall. The damper comprises a guide rail system, an outer curtain wall, springs, connecting cables, an inertia chamber, a guide pulley, and a limit bar. The guide rail system comprises a fixed end and a sliding end. The fixed end is fixed to the base of the inner curtain wall, the outer end of the sliding end is fixed to the movable outer curtain wall, and a sliding device is provided between the sliding end and the fixed end. The base of the inner curtain wall is provided with multiple sets of springs. The inertia chamber is disposed in a cavity between the outer and inner curtain walls and is fixed to the floor slab. One end of the connecting cable is connected to the inertia chamber, and the other end is connected to the sliding end. The present invention fully utilizes the mass of the outer curtain wall portion of the double-skin curtain wall to participate in vibration reduction. The inertia chamber is introduced to minimize the additional mass of the damper, which is beneficial for improving the utilization rate of the tuned inertial mass damper and thus achieving a lightweight damper.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering structure vibration reduction, and in particular relates to a distributed tuned inertial damper based on a double-layer curtain wall for wind vibration control of high-rise buildings and a control method thereof. Background Art

[0002] In recent years, double-skin curtain walls have been widely used in high-rise buildings due to their attractive aesthetics and energy-saving performance. However, high-rise buildings often experience misalignment between the center of rigidity and the center of mass of each floor. Wind-induced coupled translational and torsional responses in the structure result in three-dimensional wind-induced vibrations, impacting occupant comfort. While the classic tuned mass damper (TMD) is simple, reliable, and low-maintenance, it suffers from low robustness to structural frequencies and occupies a significant amount of building space. Distributed tuned mass dampers (MTMDs) offer flexible installation space but require a significant additional mass to achieve significant wind-induced vibration control. Inertia devices (IIDs) can provide a significant inertial effect with a minimal mass. Combining them with a tuned mass damper (TMD) to form a tuned mass damper-inerter (TMDI) significantly enhances the damping characteristics of the damper and significantly reduces its vibration travel. Current TMDI concepts and practices rely on placing inertia vessels across multiple floors within a building to achieve effective wind-induced vibration control. This results in TMDI potentially occupying more interior building space than MTMD. Furthermore, previous research has limited the use of dampers to controlling wind-induced vibration in a single direction within high-rise buildings, ignoring the impact of three-dimensional wind-induced vibration.

[0003] In order to effectively reduce the space occupied by the damper in high-rise buildings, effectively reduce the additional mass of the damper, and improve the control of wind-induced vibrations of high-rise buildings, it is necessary to develop a new set of tuned inertial dampers. Summary of the Invention

[0004] The first object of the present invention is to provide a distributed tuned inertial damper for high-rise buildings based on double-skin curtain walls, thereby providing effective wind vibration control for such double-skin curtain wall high-rise buildings.

[0005] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0006] A distributed tuned inertial damper for high-rise buildings based on double-layer curtain walls, comprising a guide rail system, an outer curtain wall, springs, connecting cables, an inertia container, a guide pulley, and a limit clip.

[0007] The outer curtain wall includes a movable outer curtain wall and a fixed outer curtain wall;

[0008] The movable outer curtain wall is arranged in a guide rail system, and the guide rail system includes a fixed end and a sliding end, the fixed end is fixed to the base of the inner curtain wall, the outer end of the sliding end is fixed to the movable outer curtain wall, and a sliding device is provided between the sliding end and the fixed end;

[0009] A plurality of springs are provided on the base of the inner curtain wall, and the expansion and contraction directions of the springs are consistent with the movement direction of the movable outer curtain wall;

[0010] The inertia container is arranged in the cavity between the outer curtain wall and the inner curtain wall, and the inertia container is fixed to the floor slab; the inertia container is arranged below the movable outer curtain wall; the movable outer curtain wall and the inertia container are arranged in adjacent floors or across floors;

[0011] One end of the connecting cable is connected to the inertia container, and the other end of the connecting cable is connected to the sliding end in the guide rail system; the sliding end is the sliding end of the upper guide rail and / or the sliding end of the lower guide rail.

[0012] A connecting cable is passed through the guide pulley to form a turning direction of the connecting cable;

[0013] The limiting clip is arranged at the junction of the movable outer curtain walls on two adjacent facades and is clamped between the two to prevent the movable outer curtain walls on the two adjacent facades from colliding with each other.

[0014] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0015] As a preferred technical solution of the present invention: the sliding device is a roller, a slider, or a rolling bearing.

[0016] As a preferred technical solution of the present invention: the cross-section of the limiting clip is arrow-shaped, and the arrow-shaped limiting clip includes arrow parts and tail parts on both sides; the tail parts are fixedly connected to the corners of the building body, and the tail parts and the arrow parts on both sides respectively form a accommodating space for the movable external curtain wall on the corresponding facade, and a guide pulley is provided in the accommodating space.

[0017] Another object of the present invention is to provide a method for controlling modal vibration of a high-rise building.

[0018] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0019] A method for controlling modal vibration of a high-rise building comprises the following steps:

[0020] S1. Distribute one or more high-rise building distributed tuned inertial dampers based on double-skin curtain walls as described above along the vertical direction of the high-rise building body;

[0021] S2. Control the dampers installed on different floors of the building to tune them to the same natural frequency of the high-rise building, thereby controlling a certain modal vibration of the high-rise building;

[0022] Alternatively, dampers installed on different building floors are controlled to tune to different natural frequencies of the high-rise building body, thereby achieving simultaneous control of multi-modal vibrations of the high-rise building body.

[0023] The present invention provides a high-rise building distributed tuned inertial damper and control method based on double-layer curtain wall, which has the following characteristics:

[0024] Beneficial effects:

[0025] (1) Based on the vertical arrangement of the tuned inertial damper of the double-skin curtain wall at the building height, the mass of the building maintenance structure itself, that is, the mass of the outer curtain wall of the double-skin curtain wall, is fully utilized to participate in vibration reduction. In addition, the inertia container is introduced to minimize the introduction of the additional mass of the damper, which is conducive to improving the utilization rate of the tuned inertial damper and thus realizing the lightweighting of the damper.

[0026] (2) Through the vertical arrangement of the dampers, the dampers located on different building floors can be tuned to the same natural frequency of the building body, thereby strengthening the control of a certain modal vibration; the dampers located on different building floors can be tuned to different natural frequencies of the building body to achieve multi-modal control of the building body at the same time, especially three-dimensional wind-induced vibration control, thereby achieving high efficiency of the dampers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an axonometric diagram of a distributed tuned inertial damper for a high-rise building based on a double-layer curtain wall provided by the present invention;

[0028] Figure 2 A partial top view of a high-rise building distributed tuned inertial damper based on a double-layer curtain wall provided by the present invention at a floor level;

[0029] Figure 3 A partial cross-sectional view of a distributed tuned inertial damper for a high-rise building based on a double-layer curtain wall provided by the present invention;

[0030] Figure 4 This is an elevation view of a high-rise building distributed tuned inertial damper based on a double-layer curtain wall provided by the present invention;

[0031] Figure 5 A vertical arrangement diagram of the distributed tuned inertial damper for high-rise buildings based on double-layer curtain walls provided by the present invention on a high-rise building;

[0032] In the figure: 2-external curtain wall; 3-spring; 4-connecting cable; 5-inertia container; 6-guide pulley; 7-limiting clip; 8-inner curtain wall. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 As shown, a distributed tuned inertial mass damper for high-rise buildings based on double-layer curtain walls is required. The facade of the building where the damper is installed must be a double-layer curtain wall with a columnar segment with a regular quadrilateral cross-section. The distributed tuned inertial mass damper for high-rise buildings based on double-layer curtain walls includes a guide rail system, an outer curtain wall 2 (including a movable outer curtain wall and a fixed outer curtain wall, wherein the movable outer curtain wall can move left and right parallel to the building facade), a spring 3, a connecting cable 4, an inertia container 5, a guide pulley 6, and a limit clamp 7.

[0035] The single tuned inertial damper consisting of the above 7 parts is arranged vertically in the height direction of the high-rise building.

[0036] The limiting clamping strips 7 are installed at the corners of the four corners of the building body, and the guide pulleys 6 are installed in the limiting clamping strips 7.

[0037] The guide rail system includes a fixed end and a sliding end. The fixed end is fixedly connected to the base of the fixed inner curtain wall 8, and the sliding end is combined with the movable outer curtain wall to achieve parallel movement of the movable outer curtain wall.

[0038] One end of the connecting cable 4 is connected to the movable outer curtain wall (specifically, to the sliding end of a guide rail system fixed to the movable outer curtain wall), and the other end is connected to the inertia container 5. The inertia container 5 is fixedly connected to the floor slab on a different floor from the movable outer curtain wall; the inertia container 5 is arranged below the movable outer curtain wall; the movable outer curtain wall and the inertia container 5 are arranged on adjacent floors or across floors.

[0039] When the building is subjected to wind-induced vibrations, the movable exterior curtain wall, equipped with a guide rail system, acts as a tuned mass, generating relative displacement parallel to the building's facade. This displacement is transmitted via connecting cables 4 to inertia chambers 5 installed on different floors, causing their apparent mass to also act as a tuned mass, providing damping, thereby controlling wind-induced vibrations. The type of inertia chamber can be selected based on the actual building vibration control needs, offering design flexibility. Common inertia chambers include rack-and-pinion inertia chambers and ball screw inertia chambers.

[0040] like Figure 2As shown, the limit clips 7 are installed at the four corners of the rectangular building structure. Their cross-section is arrow-shaped, and their tails are fixed to the corners of the building structure using bolts or welding. Buffer devices are installed inside the arrows on both sides, enveloping the movable curtain walls on the corresponding facades to prevent collisions between curtain walls on different facades. Guide pulleys 6 are also installed inside the arrows on both sides to guide and support the cables. The pulleys are generally 15 cm in diameter, and their bearings are well lubricated to ensure smooth cable movement.

[0041] like Figure 3 As shown, the outer curtain wall 2 (that is, the movable outer curtain wall) of the assembled guide rail system is divided into three parts: upper, middle and lower, including an upper guide rail 1-1, a movable outer curtain wall and a lower guide rail 1-2. The fixed ends of the upper guide rail 1-1 and the lower guide rail 1-2 are fixedly connected to the arm end of the inner curtain wall (that is, the base of the inner curtain wall) using expansion bolts or chemical anchors to provide a motion track, and the sliding end is connected to the movable outer curtain wall and fixed with high-strength bolts and steel plates to ensure a firm connection. A sliding device is also required between the sliding end and the fixed end of the guide rail system so that the movable outer curtain wall as a whole can move parallel to the facade of the building where it is located; the sliding device is a roller or a slider or a rolling bearing. The upper guide rail 1-1 is equipped with a spring 3 to provide elastic restoring force. The spring 3 generally uses multiple sets of springs to ensure the stiffness performance under long-term use. The overall stiffness of the spring is determined according to the frequency corresponding to the tuned high-rise building mode, that is:

[0042]

[0043] In the above formula: k is the overall stiffness of the spring, m is the mass of a set of movable external curtain walls, b is the apparent mass of the equipped inertia container, ω s is the circular frequency tuned to the high-rise building mode. The viscous force is provided by the rolling friction of the sliding device (such as rollers, sliders or rolling bearings), the guide pulley, and the internal friction of the inertia container. Its damping coefficient is:

[0044] c=2(m+b)ξ s ω s

[0045] In the above formula: c is the damping coefficient, ξ s is the damping ratio.

[0046] like Figure 4As shown, the connecting cable 4 is made of high-strength steel to ensure that the zipper can accurately transmit displacement and force, and its deformation is negligible. One end of the connecting cable 4 is connected to the movable outer curtain wall (specifically, to the sliding end of the guide rail system fixed to the movable outer curtain wall) and is fixed using a high-strength steel clamp. The other end changes the direction of cable tension transmission through a guide pulley 6 installed on a limit clamp 7, crosses the floor, and connects to the inertia container 5, allowing the movable outer curtain wall and inertia container 5 to be arranged on different floors.

[0047] Inertia container 5 is secured to the floor slab using steel brackets. Expansion bolts or chemical anchors are used to secure the steel brackets to the floor slab. The connection is driven by connecting cables 4. The mass of inertia container 5 can be determined based on the required vibration reduction efficiency for building vibration control and the damper output.

[0048] like Figure 5 As shown in the figure, each single tuned inertial damper can be installed on any floor in principle. However, in order to better play the role of the inertial container, the damper can be installed near the floor where there is a sudden change in mass or stiffness, so that better vibration control effect can be achieved with fewer floor spans.

[0049] The above specific implementation cases are used to illustrate the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the scope of protection of the claims shall fall within the scope of protection of the present invention.

Claims

1. A distributed tuned inertial damper for high-rise buildings based on double-layer curtain walls, characterized by: It includes a guide rail system, an outer curtain wall (2), a spring (3), a connecting cable (4), an inertia container (5), a guide pulley (6), and a limit clip (7); The outer curtain wall (2) includes a movable outer curtain wall and a fixed outer curtain wall; The movable outer curtain wall is arranged in a guide rail system, the guide rail system comprises a fixed end and a sliding end, the fixed end is fixed to a base of an inner curtain wall (8), the outer end of the sliding end is fixed to the movable outer curtain wall, and a sliding device is provided between the sliding end and the fixed end; A plurality of groups of springs (3) are provided on the base of the inner curtain wall (8), and the expansion and contraction direction of the springs (3) is consistent with the moving direction of the movable outer curtain wall; The inertia container (5) is arranged in a cavity between an outer curtain wall and an inner curtain wall (8), and the inertia container (5) is fixed to a floor slab; the inertia container (5) is arranged below a movable outer curtain wall; the movable outer curtain wall and the inertia container (5) are arranged in adjacent layers or across layers; One end of the connecting cable (4) is connected to the inertia container (5), and the other end of the connecting cable (4) is connected to the sliding end in the guide rail system; A connecting cable (4) is passed through the guide pulley (6) to form a turning direction of the connecting cable (4); The limiting clamping strip (7) is arranged at the junction of the movable outer curtain walls on two adjacent facades and is clamped between the two to prevent the movable outer curtain walls on the two adjacent facades from colliding with each other.

2. The distributed tuned inertial damper for high-rise buildings based on double-skin curtain walls according to claim 1 is characterized in that: The sliding device is a roller, a slider or a rolling bearing.

3. The distributed tuned inertial damper for high-rise buildings based on double-skin curtain walls according to claim 1 is characterized in that: The cross section of the limiting clamping strip (7) is arrow-shaped, and the arrow-shaped limiting clamping strip (7) comprises arrow portions on both sides and an arrow tail portion; the arrow tail portion is fixedly connected to the corner of the building body, and the arrow tail portion and the arrow portions on both sides respectively form a accommodating space for the movable external curtain wall on the corresponding facade, and a guide pulley (6) is provided in the accommodating space.

4. A method for controlling modal vibration of a high-rise building, characterized by: The method comprises the following steps: S1. Arrange one or more high-rise building distributed tuned inertial dampers based on double-layer curtain walls according to any one of claims 1 to 3 in a distributed manner along the vertical direction of the high-rise building body; S2. Control the dampers installed on different building floors to tune them to the same natural frequency of the high-rise building, thereby controlling a certain modal vibration of the high-rise building. Alternatively, dampers installed on different building floors are controlled to tune to different natural frequencies of the high-rise building body, thereby achieving simultaneous control of multi-modal vibrations of the high-rise building body.

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