Torsion type friction yield two-stage energy dissipation coupling beam shock absorber

Abstract

The invention belongs to the field of vibration control of building structures, and discloses a torsion type friction yield two-stage energy consumption coupling beam shock absorber which is mainly used for solving the problem that an existing coupling beam shock absorber cannot achieve self-adaptive energy consumption in multiple working scenes. A first-stage energy dissipation structure is formed between the friction plate on the upper lug plate and the lower lug plate, and second-stage energy dissipation structures are formed between the friction plate on the upper lug plate and the lower lug plate and between the upper lug plate and the torsion steel pipe. Under the action of small earthquakes or wind vibration, the first-stage energy dissipation structure can provide enough static friction damping effect, achieve absorption of vibration energy and prevent the building structure from deforming, and when large earthquakes happen, the second-stage energy dissipation structure achieves further dissipation of energy and effectively reduces earthquake response and deformation damage of the building structure. Self-adaptive energy consumption under different vibration intensities can be achieved, the adaptive capacity is higher, the energy consumption and shock absorption effect is better, and the comfort and safety are higher for high-rise buildings.

Description

Technical Field

[0001] The invention belongs to the field of building structure vibration control, and in particular relates to a torsional friction yielding two-stage energy dissipation connecting beam shock absorber. Background Art

[0002] In the current field of building structure design, especially for high-rise and super high-rise buildings, earthquake-resistant design has always been a crucial consideration. With the continuous acceleration of urbanization, high-rise buildings are increasingly appearing in our cities. Therefore, how to ensure the safety and stability of these buildings in natural disasters such as earthquakes has become an important challenge facing engineers.

[0003] In earthquake-resistant design, coupling beams are key load-bearing components in building structures, and their performance directly affects the earthquake resistance of the entire building structure. However, traditional coupling beam designs are prone to severe shear failure under strong earthquakes, which not only brings great difficulties to the post-earthquake repair of buildings, but also may cause the building to be unable to be repaired due to excessive local damage, and eventually be demolished and rebuilt, causing huge economic losses and casualties.

[0004] To solve this problem, some research and development results of replaceable energy-absorbing coupling beams have been developed. These coupling beams are designed to absorb seismic energy through specific energy-absorbing mechanisms during moderate and large earthquakes, thereby reducing structural damage. However, most of these coupling beams only maintain their own elasticity during small earthquakes and wind vibrations, and cannot fully exert their energy-absorbing function, and cannot meet the comfort requirements of high-rise and super-high-rise building structures.

[0005] Therefore, the present invention proposes a torsional friction yield two-stage energy dissipation connecting beam shock absorber. The shock absorber can achieve adaptive energy dissipation under different vibration intensities through a unique structural design, which can not only provide necessary damping during small earthquakes and wind vibrations, but also absorb seismic energy through friction yield and metal torsion during medium and large earthquakes, thereby effectively protecting the building structure from earthquake damage. Summary of the invention

[0006] The purpose of the present invention is to provide a torsional friction yielding two-stage energy dissipation connecting beam shock absorber, aiming to solve the problem that the existing connecting beam shock absorber cannot realize adaptive energy dissipation in multiple working scenarios.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A torsional friction yielding two-stage energy-absorbing connecting beam shock absorber comprises an upper end plate and a lower end plate, wherein the upper end plate is provided with an upper ear plate, and the lower end plate is provided with a lower ear plate. The invention is characterized in that a friction plate is fixedly mounted on the upper ear plate, and a torsional steel tube is fixedly mounted on the lower ear plate, the friction plate contacts the lower ear plate to form a friction surface, and the upper ear plate is fixedly connected to the torsional steel tube.

[0009] As a further preferred embodiment of the present technical solution, the upper ear plate, the friction plate and the lower ear plate are connected and clamped by prestressed bolts.

[0010] As a further preferred embodiment of the present technical solution, a deformation monitoring module is also installed on the upper end plate and the lower end plate.

[0011] As a further preferred embodiment of the present technical solution, the deformation monitoring module includes a first displacement sensor installed on the upper end plate and a second displacement sensor installed on the lower end plate, the first displacement sensor and the second displacement sensor are both arranged on the same side of the relative torsion direction of the upper end plate and the lower end plate, and the first displacement sensor and the second displacement sensor are connected by a displacement line.

[0012] As a further preferred embodiment of the present technical solution, the first displacement sensor and the second displacement sensor are alternately arranged front and back along the relative torsion direction of the upper end plate and the lower end plate, and the projection positions of the first displacement sensor and the second displacement sensor on the front projection view are on the same vertical line.

[0013] As a further preferred embodiment of the present technical solution, two deformation monitoring modules are provided, and the two deformation monitoring modules are respectively arranged on both sides of the relative torsion direction of the upper end plate and the lower end plate, and are arranged in a cross shape.

[0014] As a further preferred embodiment of the present technical solution, the upper ear plate includes a left ear plate and a right ear plate, the lower ear plate includes an inner ear plate and two outer ear plates located on both sides of the inner ear plate, the friction plates are respectively installed on the opposite inner sides of the left ear plate and the right ear plate, and are in contact with both sides of the inner ear plate to form friction surfaces; the torsion steel pipes are respectively installed between the inner ear plate and the two outer ear plates, and are respectively fixedly connected to the left ear plate and the right ear plate.

[0015] As a further preferred embodiment of the present technical solution, the upper ear plate is annularly sleeved on the torsion steel tube.

[0016] As a further preferred embodiment of the present technical solution, both the upper ear plate and the lower ear plate are made of high-strength steel.

[0017] As a further preferred embodiment of the present technical solution, the friction plate is made of a material with a high friction coefficient.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with a two-stage energy dissipation structure, including a primary energy dissipation structure formed between the friction plate on the upper ear plate and the lower ear plate, and its energy dissipation principle mainly relies on the static friction between the friction plate and the lower ear plate; a secondary energy dissipation structure formed between the friction plate on the upper ear plate and the lower ear plate and between the upper ear plate and the torsion steel pipe, and its energy dissipation principle mainly relies on the dynamic friction heat generation between the friction plate and the lower ear plate and the metal yield torsion of the torsion steel pipe itself; in the case of small earthquakes or wind vibrations, the primary energy dissipation structure can provide sufficient static friction damping to achieve the absorption of vibration energy and prevent the deformation of the building structure. In the event of a large earthquake, the secondary energy dissipation structure can achieve further energy dissipation, effectively reducing the seismic response and deformation damage of the building structure; the present invention can achieve adaptive energy dissipation under different vibration intensities, has stronger adaptability, better energy dissipation and shock absorption effect, and is more comfortable and safe for high-rise buildings.

[0020] 2. The present invention connects and clamps the upper ear plate, the friction plate and the lower ear plate through prestressed bolts. The force between the upper ear plate, the friction plate and the lower ear plate can be controlled by adjusting the prestress of the prestressed bolts, so as to adapt to the needs under different vibration intensities. In addition, after deformation within the allowable range occurs, the relative position of the upper end plate and the lower end plate can be restored by the prestressed bolts to achieve post-earthquake recovery. The present invention can be reused, thereby increasing the service life of the present invention.

[0021] 3. The present invention is also provided with a deformation monitoring module, which specifically includes a first displacement sensor installed on the upper end plate and a second displacement sensor installed on the lower end plate. The first displacement sensor and the second displacement sensor are both arranged on the same side of the relative torsion direction of the upper end plate and the lower end plate. The first displacement sensor and the second displacement sensor are connected by a displacement line. The horizontal and vertical displacements of the upper end plate and the lower end plate are measured by the two displacement sensors and the displacement line connecting the two displacement sensors. The deformation between the upper end plate and the lower end plate is calculated in combination with the Pythagorean principle, and the force value can be inferred based on the deformation, providing an important basis for the seismic design and reinforcement of the building structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a side structural schematic diagram of the present invention;

[0025] Among them, 1-upper end plate, 2-lower end plate, 3-upper ear plate, 31-left ear plate, 32-right ear plate, 4-lower ear plate, 41-inner ear plate, 42-outer ear plate, 5-friction plate, 6-torsion steel pipe, 7-prestressed bolt, 8-first displacement sensor, 9-second displacement sensor, 10-displacement line. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example

[0028] like Figure 1 to Figure 2 A torsional friction yielding two-stage energy-absorbing connecting beam shock absorber shown in the figure includes an upper end plate 1 and a lower end plate 2, wherein the upper end plate 1 and the lower end plate 2 are respectively connected and fixed to the ends of the required connecting beam structure, the upper end plate 1 is provided with an upper ear plate 3, and the lower end plate 2 is provided with a lower ear plate 4; a friction plate 5 is fixedly mounted on the upper ear plate 3, and a torsional steel tube 6 is fixedly mounted on the lower ear plate 4, the friction plate 5 contacts the lower ear plate 4 to form a friction surface, and the upper ear plate 3 is fixedly connected to the torsional steel tube 6.

[0029] The working principle of the present invention is that: a two-stage energy dissipation structure is provided, including a primary energy dissipation structure formed between the friction plate 5 on the upper ear plate 3 and the lower ear plate 4, and its energy dissipation principle mainly relies on the static friction between the friction plate 5 and the lower ear plate 4; a secondary energy dissipation structure formed between the friction plate 5 on the upper ear plate 3 and the lower ear plate 4 and between the upper ear plate 3 and the torsion steel tube 6, and its energy dissipation principle mainly relies on the dynamic friction heat generated between the friction plate 5 and the lower ear plate 4 and the metal yield torsion of the torsion steel tube 6 itself; in the event of a small earthquake or wind vibration, the primary energy dissipation structure can provide sufficient static friction damping to absorb vibration energy and prevent deformation of the building structure. In the event of a large earthquake, the static friction damping force generated by the primary energy dissipation structure can no longer offset all the vibration energy. At this time, the dynamic friction heat generated in the secondary energy dissipation structure and the metal yield torsion of the torsion steel tube 6 itself are used to achieve further energy dissipation, effectively reducing the seismic response and deformation damage of the building structure.

[0030] More specifically, the upper ear plate 3 includes a left ear plate 31 and a right ear plate 32, and the lower ear plate 4 includes an inner ear plate 41 and two outer ear plates 42 located on both sides of the inner ear plate 41. In this embodiment, the left ear plate 31, the right ear plate 32, the inner ear plate 41, and the outer ear plate 42 are all fixed to the upper end plate 1 and the lower end plate 2 by welding; the friction plates 5 are respectively installed on the inner sides of the left ear plate 31 and the right ear plate 32 to contact with both sides of the inner ear plate 41 to form a friction surface; the torsion steel pipe 6 is respectively installed between the inner ear plate 41 and the two outer ear plates 42, and is fixedly connected to the left ear plate 31 and the right ear plate 32. At the same time, in order to ensure the connection strength between the upper ear plate 3 and the torsion steel pipe 6, the upper ear plate 3 is annularly sleeved on the torsion steel pipe 6. In this embodiment, the upper ear plate 3 and the torsion steel pipe 6 are fixed by welding.

[0031] Furthermore, the present invention connects and clamps the upper ear plate 3, the friction plate 5 and the lower ear plate 4 through prestressed bolts 7, and the force between the upper ear plate 3, the friction plate 5 and the lower ear plate 4 can be controlled by adjusting the prestress of the prestressed bolts 7, so as to adapt to the needs under different vibration intensities. In addition, the present invention can restore the relative position of the upper end plate 1 and the lower end plate 2 through the prestressed bolts 7 after deformation within the allowable range occurs, thereby achieving post-earthquake recovery, being reusable, and increasing the service life of the present invention.

[0032] In this embodiment, the upper ear plate 3 and the lower ear plate 4 are made of high-strength steel to ensure their stability and durability when bearing earthquake forces, such as alloy steel, manganese steel, etc.; the friction plate 5 is made of a material with a high friction coefficient so that it can generate heat and consume energy through friction when an earthquake occurs, such as cast iron, steel, ceramics, etc. Since the selection of materials is not the focus of the innovation of the present invention, this embodiment only briefly exemplifies feasible materials, and does not mean that the types of materials available for the above components are limited to the types listed above.

[0033] Example 2

[0034] The main difference between this embodiment and Embodiment 1 is that in this embodiment, a deformation monitoring module is further installed on the upper end plate 1 and the lower end plate 2 .

[0035] Furthermore, the deformation monitoring module includes a first displacement sensor 8 installed on the upper end plate 1 and a second displacement sensor 9 installed on the lower end plate 2. The first displacement sensor 8 and the second displacement sensor 9 are both arranged on the same side of the relative torsion direction of the upper end plate 1 and the lower end plate 2. The first displacement sensor 8 and the second displacement sensor 9 are connected by a displacement line 10. In the present embodiment, the displacement line 10 is a prestressed FRP tendon. The first displacement sensor 8 and the second displacement sensor 9 are alternately arranged front and back along the relative torsion direction of the upper end plate 1 and the lower end plate 2, and the projection positions of the first displacement sensor 8 and the second displacement sensor 9 on the front projection view are on the same vertical line.

[0036] The present invention measures the horizontal and vertical displacements of the upper end plate 1 and the lower end plate 2 by means of two displacement sensors 8 and 9 and a displacement line 10 connecting the two displacement sensors 8 and 9, and calculates the deformation between the upper end plate 1 and the lower end plate 2 in combination with the Pythagorean principle, and can infer the magnitude of the force value according to the deformation, thereby achieving real-time monitoring and perception of the working state and deformation of the shock absorber, and judging the earthquake damage of the shock absorber and adjacent key components, providing an important basis for the seismic design and reinforcement of the building structure.

[0037] In this embodiment, in order to ensure the accuracy of the measurement data, the displacement of the upper end plate 1 and the lower end plate 2 is monitored at multiple angles, and two deformation monitoring modules are provided. The two deformation monitoring modules are respectively arranged on both sides of the relative torsion direction of the upper end plate 1 and the lower end plate 2, and are arranged in a cross shape.

[0038] The following is an overall installation idea disclosed by the present invention in combination with the technical solutions of Example 1 and Example 2:

[0039] When manufacturing and installing the torsional friction yield two-stage energy dissipation connecting beam shock absorber in the present invention, we must first ensure the quality and precision of each component. For example, the upper ear plate 3 and the lower ear plate 4 are both made of high-strength steel to ensure their stability and durability when subjected to seismic forces; the selection of the prestressed bolts 7 needs to consider their strength and adjustability so as to adjust the force size under different vibration intensities; the friction plate is made of a material with a high friction coefficient so as to generate heat and dissipate energy through friction when an earthquake occurs; the torsional steel pipe 6, as a core energy dissipation element, needs to undergo strict material selection and heat treatment to ensure its yield strength and durability. During manufacturing, firstly, the upper end plate 1 and the lower end plate 2 are respectively firmly welded to the left ear plate 31, the right ear plate 32, the inner ear plate 41, and the outer ear plate 42 through the slots to initially form the corresponding local structure, and then the first displacement sensor 8 and the second displacement sensor 9 are accurately installed at the corresponding positions on the upper end plate 1 and the lower end plate 2 respectively; then, the friction plate 5 is fixed to the left ear plate 31 and the right ear plate 32 by welding or bolting, and then the torsion steel tube 6 is placed between the inner ear plate 41 and the outer ear plate 42 and The left ear plate 31 and the right ear plate 32 are sleeved on the torsion steel tube 6, and then the torsion steel tube 6 and the inner ear plate 41, the outer ear plate 42, the left ear plate 31, and the right ear plate 32 are welded respectively; finally, the displacement line 10 is connected, and the force between the upper ear plate 3, the friction plate 5 and the lower ear plate 4 is adjusted by the prestressed bolts 7 to meet the needs under different vibration intensities. During the adjustment process, it is necessary to ensure the close fit and stability between the various components to ensure that the present invention can fully exert its energy dissipation and shock absorption function during an earthquake.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A torsional friction yielding two-stage energy dissipation connecting beam shock absorber, comprising an upper end plate (1) and a lower end plate (2), wherein the upper end plate (1) is provided with an upper ear plate (3), and the lower end plate (2) is provided with a lower ear plate (4), characterized in that: A friction plate (5) is fixedly mounted on the upper ear plate, a torsion steel tube (6) is fixedly mounted on the lower ear plate (4), the friction plate (5) contacts with the lower ear plate (4) to form a friction surface, and the upper ear plate (3) is fixedly connected to the torsion steel tube (6).

2. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 1 is characterized in that: The upper ear plate (3), the friction plate (5) and the lower ear plate (4) are connected and clamped by means of prestressed bolts (7).

3. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 1 is characterized in that: A deformation monitoring module is also installed on the upper end plate (1) and the lower end plate (2).

4. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 3 is characterized in that: The deformation monitoring module comprises a first displacement sensor (8) mounted on the upper end plate (1) and a second displacement sensor (9) mounted on the lower end plate (2); the first displacement sensor (8) and the second displacement sensor (9) are both arranged on the same side of the relative torsion direction of the upper end plate (1) and the lower end plate (2); the first displacement sensor (8) and the second displacement sensor (9) are connected via a displacement line (10).

5. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 4 is characterized in that: The first displacement sensor (8) and the second displacement sensor (9) are arranged alternately front and back along the relative torsion direction of the upper end plate (1) and the lower end plate (2), and the projection positions of the first displacement sensor (8) and the second displacement sensor (9) on the front projection view are on the same vertical line.

6. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 5 is characterized in that: Two deformation monitoring modules are provided, and the two deformation monitoring modules are respectively arranged on both sides of the relative torsion direction of the upper end plate (1) and the lower end plate (2), and are arranged in a cross shape.

7. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 1 is characterized in that: The upper ear plate (3) comprises a left ear plate (31) and a right ear plate (32); the lower ear plate (4) comprises an inner ear plate (41) and two outer ear plates (42) located on both sides of the inner ear plate (41); the friction plates (5) are respectively installed on the inner sides of the left ear plate (31) and the right ear plate (32) opposite to each other, and are in contact with both sides of the inner ear plate (41) to form friction surfaces; the torsion steel pipe (6) is respectively installed between the inner ear plate (41) and the two outer ear plates (42), and is respectively fixedly connected to the left ear plate (31) and the right ear plate (32).

8. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to claim 7 is characterized in that: The upper ear plate (3) is annularly sleeved on the torsion steel pipe (6).

9. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to any one of claims 1 to 7, characterized in that: The upper ear plate (3) and the lower ear plate (4) are both made of high-strength steel.

10. The torsional friction yielding two-stage energy dissipation connecting beam shock absorber according to any one of claims 1 to 7, characterized in that: The friction plate (5) is made of a material with a high friction coefficient.

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