Collision tuned mass damper for horizontal vibration damping of building floor structure

Abstract

The utility model discloses a collision tuned mass damper for shock absorption of horizontal vibration of a building floor structure, and belongs to the technical field of structural shock absorption (vibration absorption) engineering. The utility model discloses a collision tuned mass damper for horizontal vibration damping of a building floor structure. The collision tuned mass damper comprises a fixing system and a collision tuned mass damper body. The fixing system comprises a base and a bolt; the collision tuned mass damper comprises a collision energy dissipation material, a mass block, a guide rod and a spring. The fixing system is connected with floors; the collision energy dissipation material is adhered to the inner side surface of the limiting base; the two ends of the guide rod are fixed in the side wall of the limiting base; the collision energy dissipation material, the mass and the spring block sequentially penetrate through the guide rod; and the collision tuned mass damper is adjusted to the horizontal vibration frequency of the floor slab system. When the floor vibrates horizontally, the collision tuned mass damper absorbs the kinetic energy of the floor through frequency tuning, and the mass block and the collision energy-consuming material generate collision to consume the kinetic energy, so that the vibration of the building floor can be effectively inhibited.

Description

Technical Field

[0001] The invention belongs to the technical field of structural shock (vibration) engineering, and relates to a shock reduction technology for a building floor structure, and in particular to a shock reduction technology based on a collision tuned mass damper. Background Art

[0002] Floor systems are common non-structural components of building structures, including mechanical and electrical floors, equipment floors, water supply floors, etc., which make important contributions to the use function of the structure. In earthquakes, floor systems are more susceptible to damage than structural components. Their damage will not only cause huge direct economic losses, but also cause serious secondary disasters and loss of building use functions. How to effectively reduce the structural damage of floor systems caused by vibration and reduce the losses caused by disasters has become one of the key issues in the development of floor system technology.

[0003] Tuned mass dampers have the advantages of simple structure, significant shock absorption effect, and easy implementation, and are widely used in structural shock absorption control. However, the disadvantage is that they absorb input energy through mass tuning, but due to their own low damping, they cannot effectively dissipate the input energy. Collision dampers have the characteristics of simple structure and strong energy dissipation capacity. In recent years, collision energy dissipation has been combined with mass tuning to form collision tuned mass dampers, which have the characteristics of both mass tuning and collision energy dissipation. Collision tuned mass dampers are small in size, simple in structure, and have outstanding energy dissipation capacity. They can effectively reduce floor vibration, which is of great significance for their engineering applications. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a collision tuned mass damper for horizontal vibration damping of building floor structures. On the one hand, the collision tuned mass damper absorbs the structural kinetic energy transmitted to the floor system through frequency tuning, playing the role of a traditional tuned mass damper; on the other hand, the mass block collides with the collision energy-absorbing material during operation, consumes the input kinetic energy, and increases the damping of the system; the combined effect of the two aspects can effectively suppress the vibration of the building floor system. The present invention has a simple structure, is easy to use, has a low cost, and has a significant vibration reduction effect, and can be used for earthquake resistance of building floor systems.

[0005] The object of the present invention is achieved in that:

[0006] 2. A collision tuned mass damper for horizontal vibration reduction of building floor structures, characterized in that it includes a fixing system and a collision tuned mass damper; the fixing system includes a fixed limit base and fixing bolts; the collision tuned mass damper includes a collision energy absorbing material, a mass block, a guide rod and a spring.

[0007] A fixed limit base and fixing bolts connect two mutually perpendicular collision tuned mass dampers in the transverse and longitudinal directions to the building structural members; the collision energy absorbing material is pasted on the inner surface of the side wall of the fixed limit base, and the mass block and the collision energy absorbing material fit tightly without any gap; both ends of the guide rod are welded inside the side wall of the fixed limit base; the collision energy absorbing material, mass, and spring block pass through the guide rod in sequence; the inner core of the mass block slides on the guide rod through a sliding ball, and the friction force is very small.

[0008] Furthermore, the fixed limiting base is a solid Q390 steel fixed limiting base, and the mass block is a square column iron block with a cylindrical hole therein.

[0009] Furthermore, the inner core of the mass block has a sliding ball made of stainless steel, and a lubricating material is applied on the surface.

[0010] Furthermore, the guide rod is a cylinder made of stainless steel, which is smooth and straight, and has a lubricating material applied on the surface.

[0011] Furthermore, the collision energy absorbing material includes but is not limited to viscoelastic materials and shape memory alloys, and its cross-section should be larger than the area of ​​the collision surface of the mass block.

[0012] Furthermore, the total mass of the mass blocks of the collision dampers is 1%-5% of the total mass of the floor system structure, and the mass of a single damper mass block is determined according to the number of dampers in the floor system.

[0013] Furthermore, when the spring is in a balanced position, the mass block fits tightly against the collision energy absorbing material, with no gap and no compression between the two.

[0014] Furthermore, the operating frequency of the collision tuned mass damper is adjusted to the lateral vibration frequency of the floor system.

[0015] The present invention has the following advantages and positive effects:

[0016] ① The collision tuned mass damper for horizontal vibration reduction of the building floor structure is fixed on the floor structure. It can be arranged on the upper part of the floor or on the bottom of the floor. It can be flexibly adjusted according to the actual project needs and has strong project applicability.

[0017] ② It has a wide range of applications and can be applied to various floor systems such as electrical floor, equipment floor, water supply floor, etc.

[0018] ③Simple structure, low cost, easy to promote and apply in engineering;

[0019] ④The damper has a simple and stable working mechanism, and has the characteristics of mass tuning and collision energy dissipation to increase damping. While absorbing energy, it dissipates energy. The damper has a significant effect on the wind and earthquake resistance of building floors.

[0020] In summary, the present invention has a simple structure, is easy to use, has a low cost, and has a significant vibration reduction effect, and is suitable for vibration reduction of building floor systems in various shapes and structural sizes under various environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic elevation diagram of the overall structure of the shock-absorbing floor system of the present invention.

[0022] Figure 2 It is a schematic plan view of the overall structure of the shock-absorbing floor system of the present invention.

[0023] Figure numerals: 1-collision tuning damper 1, 11-collision energy absorbing material, 12-mass block, 13-spring, 14-guide rod; 1-collision tuning damper 2, 21-collision energy absorbing material, 22-mass block, 23-spring, 24-guide rod; 3-fixing system, 31-fixed limit base, 32-fixing bolt. DETAILED DESCRIPTION

[0024] The following is a detailed description with reference to the accompanying drawings and embodiments:

[0025] 1. A structure of a collision tuned mass damper for a building floor structure

[0026] 1. Overall

[0027] like Figure 1 As shown, a collision tuned mass damper for a building floor structure includes a fixing system 3, a fixed limit base 31, and a fixing bolt 32; a collision tuned mass damper 1, a collision energy dissipation material 11, a mass block 12, a spring 13, and a guide rod 14; a collision tuned damper 2, a collision energy dissipation material 21, a mass block 22, a spring 23, and a guide rod 24;

[0028] The fixed limiting base 31 and the fixing bolts 32 connect the collision tuned mass damper 1 and the collision tuned mass damper 2 to the building structural member; the collision energy absorbing material (11, 21) is pasted on the inner surface of the fixed limiting base 31, the mass block 12 and the collision energy absorbing material 11 are tightly fitted, and the mass block 22 and the collision energy absorbing material 21 are tightly fitted without any gap; the fixed limiting base 31 is welded at both ends of the guide rod (14, 24); the collision energy absorbing material 11, the mass block 21, and the spring 31 pass through the guide rod 41 in sequence; the collision energy absorbing material 21, the mass block 22, and the spring 32 pass through the guide rod 42 in sequence; the inner core of the mass block (12, 22) slides on the guide rod (14, 24) through a sliding ball, and the friction force is very small.

[0029] The fixed limiting base 31 is a solid Q390 steel fixed limiting base, and the mass (12, 22) blocks are square column iron blocks with cylindrical holes inside.

[0030] The inner core of the mass block (12, 22) has a sliding ball made of stainless steel, and a lubricating material is applied on the surface.

[0031] The guide rods (14, 24) are cylindrical bodies made of stainless steel, smooth and straight, and lubricating materials are applied on the surfaces.

[0032] The collision energy absorbing materials (11, 21) include but are not limited to viscoelastic materials and shape memory alloys.

[0033] The total mass of the mass blocks (12, 22) of the collision dampers 1, 2 is 1%-5% of the total mass of the floor structure 4, and the mass (12, 22) of a single damper mass block 1, 2 is determined according to the number of dampers in the floor structure 4.

[0034] When the springs (31, 32) are in a balanced position, the mass block 12 and the collision energy absorbing material 11 are tightly fitted, and the mass block 22 and the collision energy absorbing material 21 are tightly fitted without any gap.

[0035] The operating frequency of the collision tuned mass dampers 1 , 2 is adjusted to the horizontal vibration frequency of the floor structure 4 .

[0036] 2. Functional components

[0037] 1) Floor

[0038] The floor 4 can be suitable for floors made of various materials and shapes, such as mechanical and electrical floors, equipment floors, and water supply floors.

[0039] 2) Fixed limit base

[0040] The fixed limiting base 31 is a solid Q390 steel stiffening rib plate, which can be processed according to the structural dimensions of the mass block. It is connected to the floor slab by bolts, and the collision energy absorbing material (11, 21) is pasted on the inner side of the fixed limiting base 31, and the guide rod (14, 24) is welded and fixed on the inner side of the fixed limiting base 31.

[0041] 3) Collision energy absorbing materials

[0042] The collision energy absorbing materials (11, 21) can be various damping energy absorbing materials, including viscoelastic materials such as rubber, foam plastics, knitted cotton, and shape memory alloys, etc. The cross section thereof should be slightly larger than the cross section of the collision surface of the collision mass block (12, 22).

[0043] 5) Mass block

[0044] A single mass block (12, 22) is a cylindrical iron block, inside which a rolling steel ball with very small sliding friction is embedded. The mass is determined by the following method: the total mass of all damper mass blocks (12, 22) is 1%-5% of the total mass of the floor system structure. The mass of a single damper mass block (12, 22) is determined according to the number of dampers 1, 2 in the floor system.

[0045] 6) Spring

[0046] The stiffness of the springs (31, 32) is determined by calculation so that the damper operating frequency is tuned to the vibration frequency of the floor structure 4. The required stiffness of the springs (31, 32) can be calculated based on the tuning frequency and the mass of the mass blocks (12, 22).

[0047] 7) Guide rod

[0048] The guide rods (14, 24) are cylindrical bodies made of stainless steel, smooth and straight, and coated with lubricating material. The outer surface of the guide rods and the rolling steel balls embedded in the mass blocks (12, 22) form a sliding surface with very little friction, and together form a sliding pair. Currently, finished guide rods and sliding blocks are available for sale on the market.

[0049] 3. Working mechanism

[0050] When an earthquake or strong wind acts on the structure, the floor structure 4 vibrates. At this time, the collision tuned mass dampers 1 and 2 installed on the floor 4 start to work. Since the working frequency of the collision tuned mass dampers 1 and 2 has been tuned to the vibration frequency of the floor system 4, the energy input to the floor structure 4 is transferred to the collision tuned mass dampers 1 and 2. The mass blocks (12 and 22) first compress the springs (31 and 32), and the kinetic energy is converted into spring potential energy; then the mass blocks (12 and 22) are rebounded, and when the springs (31 and 32) return from compression to a balanced state, the spring potential energy is completely converted into the kinetic energy of the mass blocks (12 and 22); at this time, the mass blocks (12 and 22) collide with the collision energy dissipation materials (11 and 21), and the kinetic energy is dissipated in large quantities in the collision. In this way, on the one hand, the collision tuned mass dampers 1, 2 absorb the structural kinetic energy transmitted to the floor structure 4 through frequency tuning, and play the function of the traditional tuned mass dampers 1, 2; on the other hand, the mass blocks (12, 22) collide with the collision energy-absorbing materials (11, 21) during operation, consume the input kinetic energy, and increase the damping of the system; the combined effect of the two aspects can effectively suppress the vibration of the building floor structure 4 and improve the safety of the floor structure 4.

[0051] 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. A collision tuned mass damper for horizontal vibration reduction of building floor structures, characterized in that: It includes a fixing system and a collision tuned mass damper; the fixing system includes a fixed limit base and fixing bolts; the collision tuned mass damper includes a collision energy absorbing material, a mass block, a guide rod and a spring; the fixed limit base and the fixing bolts connect two mutually perpendicular collision tuned mass dampers in the transverse and longitudinal directions to the building structure components; the collision energy absorbing material is pasted on the inner surface of the side wall of the fixed limit base, and the mass block and the collision energy absorbing material are tightly fitted without a gap; the two ends of the guide rod are welded inside the side wall of the fixed limit base; the collision energy absorbing material, the mass and the spring block pass through the guide rod in sequence; the inner core of the mass block slides on the guide rod through a sliding ball.

2. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 1, characterized in that: The fixed limiting base is a solid Q390 steel fixed limiting base, and the mass block is a square column iron block with a cylindrical hole inside.

3. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 2, characterized in that: The inner core of the mass block has a stainless steel sliding ball with lubricating material applied on the surface.

4. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 3, characterized in that: The guide rod is a stainless steel cylinder, which is smooth and straight, and the surface is coated with lubricating material.

5. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 4, characterized in that: The total mass of the mass block of the collision damper is 1%-5% of the total mass of the floor system structure, and the mass of a single damper mass block is determined according to the number of dampers in the floor system.

6. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 5, characterized in that: When the spring is in a balanced position, the mass block fits tightly against the collision energy absorbing material, with no gap and no extrusion between them.

7. A collision tuned mass damper for horizontal vibration reduction of a building floor structure as claimed in claim 6, characterized in that: The operating frequency of the collision tuned mass damper is adjusted to the horizontal vibration frequency of the floor system.

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