A kind of vertical seismic isolation and vibration control frame column with nested thick rubber

Abstract

The present invention provides a tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column, comprising: a column body, including an upper column and a lower column vertically separated and arranged; a vertical flexible node in the column, arranged between the upper column and the lower column, including an upper column end plate connected to the bottom end of the upper column, a lower column end plate connected to the top end of the lower column, and a sandwich thick-meat rubber bearing arranged between the upper column end plate and the lower column end plate; a tension bolt assembly, including upper and lower special high-strength bolts for connecting the upper and lower column end plates with the sandwich thick-meat rubber bearing, wherein the sandwich thick-meat rubber bearing includes a top plate connected to the upper column end plate, a bottom plate connected to the lower column end plate, and a rubber interlayer arranged between the top plate and the bottom plate. The tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column of the present invention can greatly reduce the vibration response of the structure under the action of vertical earthquakes, and ensure the vertical stiffness of the frame column, meeting the seismic isolation requirements of the building structure under the action of vertical earthquakes.

Description

Technical Field

[0001] The invention belongs to the field of structural shock absorption and vibration control of construction engineering technology, and specifically relates to a tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame column. Background Art

[0002] The direct and secondary disasters caused by earthquakes will pose a huge threat to human life and economic losses. The dynamic effects (vertical or horizontal) generated by earthquakes act repeatedly on buildings, forcing the structural or non-structural components in the buildings to produce large vibration responses. In severe cases, it will lead to structural failure, posing a threat to the safety of people and equipment in the buildings.

[0003] Therefore, how to reduce the seismic vibration response of building components has become an important topic in academia and engineering. Many seismic control technologies for engineering structures, such as seismic isolation technology and shock absorption technology, can effectively reduce the vibration response of the structure. Among them, seismic isolation technology has received more extensive attention due to its simple structure, good energy dissipation capacity and low cost. Seismic isolation technology aims to reduce the transmission of destructive energy caused by earthquakes to the upper structure through the deformation energy dissipation capacity of seismic isolation devices (such as flexible devices such as rubber bearings), thereby avoiding excessive vibration response of the structure and ensuring the structural safety and vibration comfort of the building.

[0004] The core of seismic isolation technology is to increase the flexibility and damping of the seismic isolation layer through flexible seismic isolation devices, and reduce the vibration response of the structural or non-structural components in the building. In the 1990s, Japan's seismic isolation technology had developed relatively maturely, and my country's research on seismic isolation technology has gradually been carried out. Nowadays, both from the perspective of theoretical research and engineering practice, the development of various technical forms such as foundation isolation, roof truss or grid isolation, and internal seismic isolation technology in houses has become mature in China.

[0005] The most commonly used isolation bearings in my country's current isolation technology are laminated rubber bearings and friction sliding rubber bearings. However, the above two types of isolation bearings can only isolate in the horizontal direction and cannot isolate vertical earthquakes. Some scholars emphasize that vertical isolation is an engineering practical problem that needs to be solved urgently, and corresponding measures must be taken to reduce the vibration response of the structure under vertical earthquakes. The reasons are: 1) Vertical earthquakes have a greater impact on structural systems with large spans or long cantilevers; 2) In buildings that use horizontal isolation, vertical earthquakes can easily cause damage, destruction and failure of non-structural components; 3) Special precision instruments such as highly sensitive medical equipment cannot operate smoothly in a vibration environment, and may cause irreversible instrument damage due to vibration, resulting in economic losses and unknown safety hazards.

[0006] In order to solve the problem of vertical seismic isolation, the research directions of domestic and foreign scholars are mostly focused on the vertical seismic absorption system with increased vertical flexibility and the three-way seismic isolation system with horizontal and vertical composite seismic isolation. However, the existing academic research is poorly systematic, and the developed foundation vertical seismic isolation devices also have certain problems: the vertical seismic isolation system of the base isolation layer and the three-way seismic isolation system have not yet balanced the contradiction between "providing sufficient vertical stiffness and stability" and "increasing the vertical natural vibration period of the structure".

[0007] Since the vertical isolation effect of the vertical isolation device concentrated at the bottom of the building structure is not significant, the distributed vertical isolation vibration control system came into being. The system is composed of a combination of vertical isolation vibration control frame columns distributed on a single or multiple floors. The vertical isolation vibration control frame columns are constructed by adding vertical flexible nodes that can provide horizontal constraints in the structural columns. Some scholars have studied the vertical response of building structures under earthquakes using distributed vertical isolation vibration control systems. The results show that the vertical period of the structure is significantly increased, and its vertical vibration response is significantly controlled. Compared with the aforementioned vertical isolation system and three-way isolation system concentrated at the bottom of the building structure, its vertical isolation efficiency is significantly improved.

[0008] The vertical seismic isolation and vibration control frame column is designed to provide vertical flexibility and additional damping for the structure, and its flexible node has the function of transmitting internal forces (bending moment, shear force). When this flexible node is set at the inflection point of the column under horizontal load, only the transmission of shear force in the column needs to be considered. In summary, it is necessary to design a distributed shear-resistant vertical seismic isolation and vibration control frame column that can meet the vertical seismic isolation requirements of current actual building structures. Summary of the invention

[0009] The present invention is made to solve the above-mentioned problem, and aims to provide a tension-nested thick-walled rubber vertical seismic isolation and vibration control frame column.

[0010] The present invention provides a tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column, which has the following characteristics, including: a column body, including an upper column and a lower column arranged vertically separately; a vertical flexible node in the column, arranged between the upper column and the lower column, including an upper column end plate connected to the bottom end of the upper column, a lower column end plate connected to the top end of the lower column, and a sandwich thick-meat rubber bearing arranged between the upper column end plate and the lower column end plate; a tension bolt assembly, including an upper end special high-strength bolt for connecting the upper column end plate and the sandwich thick-meat rubber bearing and a lower end special high-strength bolt for connecting the lower column end plate and the sandwich thick-meat rubber bearing, wherein the sandwich thick-meat rubber bearing includes a top plate connected to the upper column end plate, a bottom plate connected to the lower column end plate, and a rubber interlayer arranged between the top plate and the bottom plate.

[0011] The tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame column provided by the present invention may also have the following characteristics: wherein the separation point between the upper column and the lower column is the inflection point inside the column, and the vertical flexible node inside the column is arranged at the inflection point inside the column.

[0012] The tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column provided by the present invention may also have the following characteristics: wherein the rubber interlayer comprises multiple layers of thick-meat rubber stacked vertically, and a steel gasket is provided between two adjacent layers of thick-meat rubber.

[0013] The tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame columns provided by the present invention may also have the following features: wherein the upper column end plate, the top plate and the bottom plate are all provided with upper end connecting screw holes, and the upper end special high-strength bolts are perforated and positioned through the upper end connecting screw holes to connect the upper column end plate, the top plate and the bottom plate.

[0014] The tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame columns provided by the present invention may also have the following features: wherein the lower column end plate, the top plate and the bottom plate are all provided with lower end connecting screw holes, and the lower end special high-strength bolts are perforated and positioned through the lower end connecting screw holes to connect the lower column end plate, the top plate and the bottom plate.

[0015] The tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame column provided by the present invention may also have the following feature: wherein the bottom ends of the upper special high-strength bolts and the lower special high-strength bolts are both trumpet-mouth structures.

[0016] Functions and Effects of the Invention

[0017] According to the present invention, a type of vertical seismic isolation and vibration control frame column with nested thick rubber is involved. By setting the vertical flexible node at the inflection point inside the column, the vertical flexibility of the structural column can be increased while ensuring the overall lateral stiffness, thereby greatly reducing the vibration response of the structure under the action of vertical earthquakes and ensuring the vertical stiffness of the frame column, meeting the seismic isolation requirements of the building structure under the action of vertical earthquakes, and achieving a balance between the vertical seismic isolation system providing sufficient vertical stiffness and stability and improving the vertical flexibility of the structure.

[0018] In addition, the tensioned nested thick-mesh rubber vertical seismic isolation and vibration control frame columns of the present invention have excellent ease of use and flexibility, and can be applied to a variety of frame column structures such as steel columns, reinforced concrete columns, etc., and the floors and the number of floors can be freely selected, which can realize the core advantages of the distributed vertical seismic isolation system and significantly reduce the overall vertical vibration response of the structure; at the same time, all parts and their welding can be prefabricated in the factory, which can meet the requirements of industrial assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic structural diagram of a tension-nested thick-walled rubber vertical seismic isolation and vibration control frame column in an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the tension-nested thick-walled rubber vertical seismic isolation and vibration control frame columns in an embodiment of the present invention;

[0021] Figure 3 It is a cross-sectional schematic diagram of a tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame column in an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of a vertical flexible node in a column in an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the matching structure of the vertical flexible node in the column and the tension bolt assembly in an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the installation position of the tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame columns in an embodiment of the present invention.

[0025] Figure numerals: tension-nested thick-fleshed rubber vertical seismic isolation and vibration control frame column 100, upper column 1, lower column 2, upper column end plate 3, lower column end plate 4, top plate 51, bottom plate 52, rubber interlayer 53, thick-fleshed rubber 531, steel gasket 532, upper end special high-strength bolt 61, lower end special high-strength bolt 62. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the vertical seismic isolation and vibration control frame columns of the present invention.

[0027] <Example>

[0028] Figure 1 It is a schematic structural diagram of a tension-nested thick-walled rubber vertical seismic isolation and vibration control frame column in an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of the tension-nested thick-walled rubber vertical seismic isolation and vibration control frame columns in an embodiment of the present invention; Figure 3 : is a cross-sectional schematic diagram of a tension-nested thick-walled rubber vertical seismic isolation and vibration control frame column in an embodiment of the present invention, Figure 3 (a) and (b) are schematic diagrams of the matching connection of the upper end special high-strength bolt 61 and the lower end special high-strength bolt 62 respectively.

[0029] like Figure 1-Figure 3 As shown, the tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame column 100 of this embodiment includes a column body, a vertical flexible node in the column, and a tension bolt assembly.

[0030] The column body comprises an upper column 1 and a lower column 2 which are vertically separated and arranged.

[0031] Figure 4 is a schematic structural diagram of a vertical flexible node in a column in an embodiment of the present invention; Figure 5 It is a schematic diagram of the matching structure of the vertical flexible node in the column and the tension bolt assembly in an embodiment of the present invention.

[0032] like Figure 4 and Figure 5 As shown, the vertical flexible node in the column is arranged between the upper column 1 and the lower column 2, including an upper column end plate 3 connected to the bottom end of the upper column 1, a lower column end plate 4 connected to the top end of the lower column 2, and a sandwich thick-meat rubber bearing arranged between the upper column end plate 3 and the lower column end plate 4.

[0033] The separation point between the upper column 1 and the lower column 2 is the inflection point of the column under horizontal load. The vertical flexible node in the column is set at the inflection point of the column. It only transmits the shear force in the column and does not affect the original horizontal load resistance capacity of the structure.

[0034] In this embodiment, the column body can use various types of structural columns, such as steel columns, steel pipe columns, steel tube concrete columns or reinforced concrete columns, and the column body is divided into an upper column 1 and a lower column 2. Taking the connection method of the upper column 1 and the upper column end plate 3 as an example, when the upper column 1 is constructed as a steel column, a steel pipe column or a steel tube concrete column, the upper column end plate 3 is welded to the bottom end of the upper column 1, and no other structure is required; if the upper column is constructed as a reinforced concrete column, such as Figure 3 As shown, the upper column end plate 3 is welded to the bottom end of the longitudinal reinforcement in the upper column 1. The connection method of the lower column 2 and the lower column end plate 4 is the same as above.

[0035] The sandwich thick-walled rubber bearing comprises a top plate 51 connected to the upper column end plate 3 , a bottom plate 52 connected to the lower column end plate 4 , and a rubber sandwich 53 arranged between the top plate 51 and the bottom plate 52 .

[0036] The rubber interlayer 53 includes multiple layers of thick rubber 531 stacked vertically, and a steel gasket 532 is provided between two adjacent layers of thick rubber 531 .

[0037] In this embodiment, three layers of thick rubber 531 are provided, and a sandwich thick rubber support is embedded in the structural column to weaken the vertical vibration response of the structure. The shape coefficient of the rubber sandwich 53 must satisfy the requirement that the rubber sandwich 53 has sufficient vertical flexibility and additional damping, that is, the ratio of the constraint area to the free surface area is small, so as to achieve its intended function.

[0038] The tension bolt assembly includes an upper end special high-strength bolt 61 for connecting the upper column end plate 3 and the sandwich thick-meat rubber bearing, and a lower end special high-strength bolt 62 for connecting the lower column end plate 4 and the sandwich thick-meat rubber bearing.

[0039] The upper column end plate 3, the top plate 51 and the bottom plate 52 are all provided with upper end connecting screw holes, and the upper end specially made high-strength bolts 61 are penetrated and positioned through the upper end connecting screw holes to connect the upper column end plate 3, the top plate 51 and the bottom plate 52.

[0040] The lower column end plate 4, the top plate 51 and the bottom plate 52 are all provided with lower end connecting screw holes, and the lower end special high-strength bolts 62 are perforated and positioned through the lower end connecting screw holes to connect the lower column end plate 4, the top plate 51 and the bottom plate 52.

[0041] In this embodiment, the bottom ends of the upper special high-strength bolts 61 and the lower special high-strength bolts 62 are both trumpet-mouth structures. When there is tension on the frame column as a whole, the upper column 1 transfers the tension to the upper special high-strength bolts 61 through the upper column end plate 3. The upper special high-strength bolts 61, due to their bottom trumpet-mouth structure, generate pressure on the overall rubber interlayer 53 through the bottom plate 52 and transmit it to the top plate 51. Since the top plate 51 is constrained by the bottom trumpet-mouth structure of the lower special high-strength bolts 62 at its upper part, the pressure is converted into tension on the lower special high-strength bolts 62. The lower special high-strength bolts 62 transfer the tension to the lower column 2 through the lower column end plate 4, thereby realizing the tension characteristic.

[0042] In this embodiment, the upper end special high-strength bolts 61 and the lower end special high-strength bolts 62 are both used in conjunction with nuts and washers.

[0043] In this embodiment, the column cross-sectional shape, column construction method, sandwich thick rubber bearing cross-sectional shape, special high-strength bolt strength and quantity can be changed according to actual use requirements, for example Figure 1 and Figure 2 As shown, the column body can use a square column or a round column, and the upper column end plate, top plate, lower column end plate, and bottom plate can use square plates or round plates of matching sizes. When set as square plates, upper end connecting screw holes are set in the center of each side of the upper column end plate, top plate, and bottom plate, and lower end connecting screw holes are set at both ends of each side of the lower column end plate, top plate, and bottom plate. The upper and lower end special high-strength bolts are respectively perforated and positioned through the corresponding upper and lower end connecting screw holes;

[0044] When set as a circular plate, upper column end plate, top plate and bottom plate are provided with upper end connecting screw holes along the circumference, and lower column end plate, top plate and bottom plate are provided with lower end connecting screw holes along the circumference. The upper and lower end special high-strength bolts are respectively perforated and positioned through the corresponding upper and lower end connecting screw holes.

[0045] Figure 6 It is a schematic diagram of the installation position of the tension-nested thick-mesh rubber vertical seismic isolation and vibration control frame columns in an embodiment of the present invention.

[0046] like Figure 6As shown, the tensioned nested thick-mesh rubber vertical seismic isolation and vibration control frame column 100 of this embodiment can be applied to a single floor or multiple floors to form a distributed vertical seismic isolation and vibration control structural system. The vertical flexible node in the column is set at the inflection point in the column. It can reduce the vertical stiffness of the structure and increase the axial damping while ensuring the overall lateral stiffness of the structure, thereby controlling the vibration response of the structure under the action of vertical earthquake.

[0047] Functions and Effects of the Embodiments

[0048] According to the tension-nested thick-mesh rubber vertical seismic isolation and vibration-controlled frame column involved in this embodiment, by setting the vertical flexible node at the inflection point inside the column, the vertical flexibility of the structural column can be increased while ensuring the overall lateral stiffness, thereby greatly reducing the vibration response of the structure under vertical earthquake action and ensuring the vertical stiffness of the frame column, meeting the seismic isolation requirements of the building structure under vertical earthquake action, and achieving a balance between the vertical seismic isolation system providing sufficient vertical stiffness and stability and improving the vertical flexibility of the structure.

[0049] In addition, the tensioned nested thick-mesh rubber vertical seismic isolation and vibration control frame columns of this embodiment have excellent ease of use and flexibility, and can be applied to a variety of frame column structures such as steel columns, reinforced concrete columns, etc., and the floors and the number of floors can be freely selected, which can realize the core advantages of the distributed vertical seismic isolation system and significantly reduce the overall vertical vibration response of the structure; at the same time, all parts and their welding can be prefabricated in the factory, which can meet the requirements of industrialized assembly.

[0050] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A vertical seismic isolation and vibration control frame column with nested thick rubber. It is characterized in that include: The column body comprises an upper column and a lower column which are vertically separated; A vertical flexible node in the column, arranged between the upper column and the lower column, comprises an upper column end plate connected to the bottom end of the upper column, a lower column end plate connected to the top end of the lower column, and a sandwich thick-meat rubber bearing arranged between the upper column end plate and the lower column end plate; The tension bolt assembly includes a specially made high-strength bolt at the upper end for connecting the upper column end plate and the sandwich thick-meat rubber bearing, and a specially made high-strength bolt at the lower end for connecting the lower column end plate and the sandwich thick-meat rubber bearing. The sandwich thick rubber bearing comprises a top plate connected to the upper column end plate, a bottom plate connected to the lower column end plate, and a rubber sandwich arranged between the top plate and the bottom plate. The upper column end plate, the top plate and the bottom plate are all provided with upper end connection screw holes, and the upper end special high-strength bolts are perforated and positioned through the upper end connection screw holes to connect the upper column end plate, the top plate and the bottom plate. The lower column end plate, the top plate and the bottom plate are all provided with lower end connection screw holes, and the lower end special high-strength bolts are perforated and positioned through the lower end connection screw holes to connect the lower column end plate, the top plate and the bottom plate. The bottom ends of the upper special high-strength bolts and the lower special high-strength bolts are both bell-mouth structures. When tension exists on the frame column as a whole, the upper column transfers the tension to the upper special high-strength bolt through the upper column end plate. Due to the bottom bell-mouth structure of the upper special high-strength bolt, the pressure generated by the rubber interlayer through the bottom plate is transferred to the top plate. The upper part of the top plate is constrained by the bottom bell-mouth structure of the lower special high-strength bolt, and the pressure is converted into tension on the lower special high-strength bolt. The lower special high-strength bolt transfers the tension to the lower column through the lower column end plate, thereby realizing the tension characteristic.

2. The tension nested thick rubber vertical seismic isolation and vibration control frame column according to claim 1 is characterized by: in, The separation point between the upper column and the lower column is the inflection point within the column, and the vertical flexible node within the column is arranged at the inflection point within the column.

3. The tension-nested thick-walled rubber vertical seismic isolation and vibration control frame column according to claim 1 is characterized in that: in, The rubber interlayer comprises multiple layers of thick rubber stacked vertically, and a steel gasket is arranged between two adjacent layers of thick rubber.

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