A friction composite buckling restrained energy dissipation support

Abstract

The present invention discloses a friction composite buckling restrained energy dissipation support, comprising a friction device and a buckling restrained energy dissipation support. The buckling restrained energy dissipation support comprises an intermediate baffle, a core material component, and an outer restraint sleeve. The outer restraint sleeve is sleeved in the middle of the core material component, and its two ports are fixedly connected to the intermediate baffle; the friction device is arranged at both ends of the core material component, and comprises an end baffle, a pressure plate, a friction material, and an outer sleeve; the outer sleeve is sleeved at both ends of the core material component, and its two ports are respectively fixedly connected to the end baffle and the intermediate baffle, and a pressure plate and a friction material are arranged in the outer sleeve, and a bolt is passed through a waist-shaped hole on the core material component to connect the pressure plate, the friction material and the core material component. The present invention utilizes that when the core material component is elastically deformed and displaced, the friction device consumes energy, so as to make up for the defect that the buckling restrained energy dissipation support can only yield and dissipate energy under medium and large earthquakes, improve its energy dissipation capacity under small earthquakes, reduce the inter-story displacement angle of small earthquakes, and reduce the damage to the structure caused by earthquakes.

Description

Technical Field

[0001] The patent of this invention relates to the field of earthquake-resistant technology, and specifically to a friction composite buckling-restrained energy-absorbing support. Background Art

[0002] my country is located in the two most active seismic zones in the world, and the casualties caused by earthquakes rank first in the world. The massive damage and collapse of buildings in earthquakes are the direct causes of earthquake disasters. The traditional earthquake-resistant method is to dissipate earthquake energy through plastic deformation of the structure itself, which will inevitably cause damage or even collapse of the structure. With the rapid development of society, higher requirements are placed on building safety. Buckling-restrained energy-absorbing braces (BRBs) have been widely used as a component of building energy dissipation and shock absorption. They have strong energy dissipation capacity and full hysteresis curves. They can not only be used as structural components, but also as a high-performance damper after yielding. However, the conventional buckling-restrained energy-absorbing braces are simple in structure, single in function, and have a large initial elastic stiffness. They cannot play an energy-absorbing role when the structural displacement is small, resulting in the building structure being unable to meet the required inter-story displacement angle requirements under small earthquakes. Adding friction energy dissipation devices at both ends of the buckling restrained energy dissipation support can improve the energy dissipation capacity and efficiency of the buckling support. The mechanism is that the core material components of the buckling restrained energy dissipation support core energy dissipation unit will slip or deform under the predetermined load before yielding, and dissipate the seismic energy by friction or damping. At the same time, since the self-seismic period is lengthened after the structural deformation, the seismic input is reduced, thereby achieving the purpose of structural seismic response. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a friction composite buckling restrained energy dissipation support, which solves the problem that the current buckling restrained energy dissipation support cannot play an energy dissipation role in wind resistance or when a small displacement occurs in the structure. The invention can meet the energy dissipation needs in small, medium and large earthquakes and in the field of wind resistance, and has excellent fatigue performance.

[0004] The technical solution of the present invention is achieved as follows: a friction composite buckling restraint energy dissipation support, characterized in that it includes a friction device and a buckling restraint energy dissipation support, the buckling restraint energy dissipation support includes an intermediate baffle, a core material assembly, and an outer restraint sleeve, the outer restraint sleeve is sleeved in the middle of the core material assembly, and the two ends of the outer restraint sleeve are fixedly connected to the intermediate baffle; the friction device is arranged at both ends of the core material assembly of the core unit of the buckling restraint energy dissipation support, including an end baffle, a pressure plate, a friction material, and an outer sleeve; the outer sleeve is sleeved at both ends of the core material assembly of the core unit, and the two ends of the outer sleeve are respectively fixedly connected to the end baffle and the intermediate baffle, and the pressure plate and friction material are arranged in sequence from the outside to the inside of the outer sleeve, and the pressure plate and friction material are connected to the core material assembly through the waist-shaped hole by bolts, nuts and gaskets, so that the friction device is connected to the buckling restraint energy dissipation support.

[0005] Furthermore, the core material component has the friction device sleeved at both ends as the connecting section, and the outer constraint sleeve sleeved in the middle as the working section, and the three are formed in one piece; the core material component runs through the end baffle, the middle baffle and the outer constraint sleeve, and the two ends of the outer sleeve are respectively fixedly connected to the end baffle and the middle baffle; the core material component of the working section is sleeved with the outer constraint sleeve, and the two ends of the outer constraint sleeve are respectively fixedly connected to the middle baffles on both sides. The end baffle and the middle baffle are used to limit the friction material from sliding.

[0006] Furthermore, the core material assembly includes a main core material and an auxiliary core material, which are fixedly welded so that the cross section of the working section of the core material assembly is straight, cross-shaped or H-shaped, and the cross section of the connecting section of the core material assembly is cross-shaped or H-shaped.

[0007] Furthermore, the waist-shaped holes are located on the connecting section of the main core material or the auxiliary core material, and the number of the waist-shaped holes is arbitrary. When the friction material and the core material assembly are fixed by bolts, the core material assembly can reciprocate within the length range of the waist-shaped holes.

[0008] Furthermore, there is a gap between the pressure plate, the friction material and the inner wall of the outer sleeve, and there is a gap between the pressure plate, the side of the friction material and the main core material or the auxiliary core material. The function of the gap is to avoid wear and damage caused by friction between the friction device and the inner wall of the outer sleeve and the auxiliary core material.

[0009] Furthermore, the cross-sections of the outer restraining sleeve and the outer sleeve are U-shaped or circular.

[0010] Furthermore, the buckling restrained energy dissipation support also includes a buffer cotton board, a filling material, and a non-bonded sliding material.

[0011] Furthermore, the shapes of the end baffle and the middle baffle are adapted to the shapes of the ports of the outer restraining sleeve and the outer sleeve.

[0012] Furthermore, the two long sides of the main core material or the auxiliary core material of the working section are recessed inwards, forming trapezoidal recessed structures on the two long sides respectively.

[0013] Furthermore, the non-bonding sliding material covers the core material component of the working section, the buffer cotton board is a diamond-shaped board, which is arranged in each trapezoidal recessed structure of the main core material or the auxiliary core material of the working section, and the shape of the diamond-shaped board is adapted to the trapezoidal recessed structure, and the filling material is located between the outer constraint sleeve and the core material component.

[0014] Working principle: When the friction composite buckling restrained energy dissipation support is in a wind-resistant state or a small earthquake, the driving force does not reach the yield bearing capacity of the core material component of the core unit of the buckling restrained energy dissipation support. At this time, the core material is in the elastic stage. Under the action of wind force, the building transfers the movement generated by the wind shock to the core material component. The core material component slips and generates friction movement with the friction material, converting kinetic energy into heat and dissipating it into the air, achieving the purpose of shock reduction and wind resistance.

[0015] When the friction composite buckling restrained energy dissipation support is in an earthquake-resistant state, the driving force is large, which is greater than the yield bearing capacity of the core material components of the core unit of the buckling restrained energy dissipation support. At this time, the core material is in the post-yield plastic deformation stage, and most of the energy generated by the building earthquake is consumed by plastic deformation. The friction movement generated by the core material components and the friction materials in the friction devices at both ends can also produce energy dissipation effects, thereby achieving joint energy dissipation.

[0016] Compared with the prior art, the beneficial effects of the present invention are: providing a friction composite buckling restrained energy dissipation support that is both wind-resistant and earthquake-resistant, and providing friction devices at both ends of the core material component of the buckling restrained energy dissipation support to cause it to slip or deform under a predetermined load before yielding, and dissipate earthquake energy by friction or damping. The invention can meet the energy dissipation requirements in the field of small, medium and large earthquakes and wind resistance, and has good fatigue performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 Schematic cross-sectional view along the AA direction;

[0019] Figure 3 for Figure 2 Schematic cross-sectional view along the MM direction;

[0020] Figure 4 This is a schematic structural diagram of the core material assembly of the core energy consumption unit of Example 1;

[0021] Figure 5 This is a schematic structural diagram of the core material assembly of the core energy consumption unit of Example 2;

[0022] Figure 6 This is a schematic structural diagram of the core material assembly of the core energy consumption unit of Example 3;

[0023] In the figure: 1-friction device, 2-buckling constraint energy dissipation support, 1-1-end baffle, 1-2-outer sleeve, 1-3-pressure plate, 1-4-friction material, 1-5-bolt, 1-6-nut, 1-7-gasket, 2-1-core material assembly, 2-1-1-main core material, 2-1-2-auxiliary core material, 2-1-3-waist-shaped hole, 2-2-middle baffle, 2-3-buffer cotton board, 2-4-outer constraint sleeve, 2-5-filling material, 2-6-non-bonded sliding material, 1-2-1-gap A, 1-2-2-gap B. DETAILED DESCRIPTION

[0024] 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.

[0025] Example 1

[0026] like Figure 1-4 A friction composite buckling restraint energy dissipation support, characterized in that it comprises a friction device 1, a buckling restraint energy dissipation support 2, the buckling restraint energy dissipation support 2 comprises an intermediate baffle 2-2, a core material component 2-1, an outer restraint sleeve 2-4, a buffer cotton board 2-3, a filler 2-5, and a non-bonded sliding material 2-6; the outer restraint sleeve 2-4 is sleeved in the middle of the core material component 2-1, and the two ends of the outer restraint sleeve 2-4 are fixedly connected to the intermediate baffle 2-2;

[0027] The friction device 1 is arranged at both ends of the core unit core material component 2-1 of the buckling restrained energy dissipation support 2, including an end baffle 1-1, a pressure plate 1-3, a friction material 1-4, and an outer sleeve 1-2; the outer sleeve 1-2 is sleeved on both ends of the core unit core material component 2-1, and the two ends of the outer sleeve 1-2 are respectively fixedly connected to the end baffle 1-1 and the middle baffle 2-2, and the pressure plate 1-3 and the friction material 1-4 are arranged in the outer sleeve 1-2 from the outside to the inside in sequence, and the bolt 1-5, the nut 1-6 and the gasket 1-7 are used to pass through the waist-shaped hole 2-1-3 to connect the pressure plate 1-3, the friction material 1-4 and the core material component 2-1.

[0028] The core material component 2-1 with friction devices 1 at both ends is the connecting section, and the core material component 2-1 with the outer constraint sleeve 2-4 in the middle is the working section, and the three are formed in one piece; the core material component 2-1 passes through the end baffle 1-1, the middle baffle 2-2 and the outer constraint sleeve 2-4, and the two ends of the outer sleeve 1-2 are fixedly connected to the end baffle 1-1 and the middle baffle 2-2 respectively; the core material component 2-1 of the working section is sleeved with the outer constraint sleeve 2-4, and the two ends of the outer constraint sleeve 2-4 are fixedly connected to the middle baffles 2-2 on both sides respectively.

[0029] The core material assembly 2-1 includes a main core material 2-1-1 and a secondary core material 2-1-2, which are fixedly welded so that the cross section of the working section of the core material assembly 2-1 is cross-shaped, and the cross section of the connecting section of the core material assembly 2-1 is cross-shaped. The waist-shaped holes 2-1-3 are located on the connecting section of the main core material 2-1-1, and there are 4 of them. When the friction material and the core material assembly are fixed by connecting bolts, the core material assembly can reciprocate within the length range of the waist-shaped holes. A gap A 1-2-1 is left between the pressure plate 1-3, the friction material 1-4 and the inner wall of the outer sleeve 1-2, and a gap B 1-2-2 is left between the pressure plate 1-3, the side of the friction material 1-4 and the secondary core material 2-1-2. The gap avoids wear and damage caused by frictional contact between the friction device 1 and the inner wall of the outer sleeve 1-2 and the secondary core material 2-1-2. The cross sections of the outer constraint sleeve 2-4 and the outer sleeve 1-2 are annular. The shapes of the end baffle 1-1 and the middle baffle 2-2 are adapted to the shapes of the ports of the outer restraining sleeve 2-4 and the outer sleeve 1-2, so that the three can be better connected.

[0030] The two long sides of the main core material 2-1-1 or the auxiliary core material 2-1-2 of the working section are recessed inward, forming a trapezoidal recessed structure on the two long sides. The non-bonding slip material 2-6 covers the core material component 2-1 of the working section, and the buffer cotton board 2-3 is a diamond-shaped board, which is arranged in each trapezoidal recessed structure of the main core material 2-1-1 or the auxiliary core material 2-1-2 of the working section, and the shape of the diamond-shaped board is adapted to the trapezoidal recessed structure. The filler 2-5 is located between the outer constraint sleeve 2-4 and the core material component (2-1). The surface of the working section of the core material component 2-1 is covered with a polymer composite viscoelastic non-bonding slip material. The main core material and the auxiliary core material can be the same material or different types of materials, such as Q235B and a low yield point soft material.

[0031] Example 2

[0032] like Figure 5 As shown, the core material assembly 2-1 includes a main core material 2-1-1 and a secondary core material 2-1-2, which are fixed and welded so that the cross section of the working section of the core material assembly 2-1 is a straight line, and the cross section of the connecting section of the core material assembly 2-1 is a cross. The waist-shaped holes 2-1-3 are located on the connecting section of the main core material 2-1-1, and the number is 4. The rest of the structure is the same as that of Example 1.

[0033] Example 3

[0034] Figure 6 As shown, the core material assembly 2-1 includes a main core material 2-1-1 and a secondary core material 2-1-2, which are fixed and welded so that the cross section of the working section of the core material assembly 2-1 is a straight line, and the cross section of the connecting section of the core material assembly 2-1 is an H-shaped cross section. The waist-shaped holes 2-1-3 are located on the connecting section of the main core material 2-1-1, and the number is 4. The rest of the structure is the same as that of Example 1.

[0035] When the friction composite buckling restrained energy dissipation support is in the wind-resistant state, the driving force does not reach the yield bearing capacity of the core material component 2-1 of the core unit of the buckling restrained energy dissipation support, and the core material is in the elastic stage. Under the action of wind force, the building transfers the movement generated by wind shock to the core material component 2-1, and the core material component (2-1) slips and generates friction movement with the friction material 1-4, converting kinetic energy into heat and dissipating it into the air, achieving the purpose of shock reduction and wind resistance. When the friction composite buckling restrained energy dissipation support is in the earthquake-resistant state, the driving force is relatively large, greater than the yield bearing capacity of the core material component 2-1 of the core unit of the buckling restrained energy dissipation support, and the core material is in the buckling plastic deformation stage. Most of the energy generated by the building during an earthquake is consumed by buckling plastic deformation. The core material component 2-1 in the friction device 1 at both ends and the friction material 1-4 move relative to each other, which can also generate energy dissipation and achieve the purpose of earthquake resistance.

[0036] The above method can realize wind resistance and earthquake resistance. This friction composite buckling restrained energy dissipation support can use the friction devices at both ends to realize wind resistance or energy dissipation under small earthquakes. Under the premise of the same structure, it can provide a greater damping force. Or under the premise of the same damper, the outer dimensions of the friction composite buckling restrained energy dissipation support can be smaller, which is more conducive to the requirements of structural aesthetics.

Claims

1. A friction composite buckling restrained energy dissipation brace, characterized in that: The invention comprises a friction device (1) and a buckling restraint energy dissipation support (2), wherein the buckling restraint energy dissipation support (2) comprises an intermediate baffle (2-2), a core material component (2-1), and an outer restraint sleeve (2-4), wherein the outer restraint sleeve (2-4) is sleeved in the middle of the core material component (2-1), and two ends of the outer restraint sleeve (2-4) are fixedly connected to the intermediate baffle (2-2); the friction device (1) is arranged at the core unit core material component (2-1) of the buckling restraint energy dissipation support (2); The two ends of the outer sleeve (1-2) include an end baffle (1-1), a pressure plate (1-3), a friction material (1-4), and an outer sleeve (1-2); the outer sleeve (1-2) is sleeved on the two ends of the core unit core material component (2-1), and the two ends of the outer sleeve (1-2) are respectively fixedly connected to the end baffle (1-1) and the middle baffle (2-2); the pressure plate (1-3) and the friction material (1-4) are arranged in sequence from the outside to the inside of the outer sleeve (1-2), and the outer sleeve (1-2) is fixedly connected to the core unit core material component (2-1) by bolts (1-5) and screws. The female part (1-6) and the gasket (1-7) pass through the waist-shaped hole (2-1-3) on the core material component (2-1) to connect the pressure plate (1-3) and the friction material (1-4) to the core material component (2-1); the two ends of the core material component (2-1) are sleeved with the friction device (1) as the connecting section, and the middle is sleeved with the external constraint sleeve (2-4) as the working section, and the three are integrally formed; the core material component (2-1) passes through the end baffle (1-1), the middle baffle (2-1) and the intermediate baffle (2-1). 2) and an outer restraining sleeve (2-4), the two ends of the outer sleeve (1-2) are respectively fixedly connected to the end baffle (1-1) and the middle baffle (2-2); the core material component (2-1) of the working section is sleeved with the outer restraining sleeve (2-4), and the two ends of the outer restraining sleeve (2-4) are respectively fixedly connected to the middle baffles (2-2) on both sides; the waist-shaped holes (2-1-3) are located on the connecting section of the main core material (2-1-1) or the auxiliary core material (2-1-2), and the number of the waist-shaped holes (2-1-3) is arbitrary.

2. A friction composite buckling restrained energy dissipation brace according to claim 1, characterized in that: The core material assembly (2-1) comprises a main core material (2-1-1) and a secondary core material (2-1-2), which are fixed and welded so that the cross section of the working section of the core material assembly (2-1) is straight, cross-shaped or H-shaped, and the cross section of the connecting section of the core material assembly (2-1) is cross-shaped or H-shaped.

3. A friction composite buckling restrained energy dissipation brace according to claim 1, characterized in that: A gap A (1-2-1) is left between the pressure plate (1-3), the friction material (1-4) and the inner wall of the outer sleeve (1-2), and a gap B (1-2-2) is left between the side of the pressure plate (1-3), the friction material (1-4) and the main core material (2-1-1) or the auxiliary core material (2-1-2).

4. A friction composite buckling restrained energy dissipation brace according to claim 1, characterized in that: The cross sections of the outer restraining sleeve (2-4) and the outer sleeve (1-2) are in the shape of a Chinese character U or a circular ring.

5. The friction composite buckling restrained energy dissipation brace according to claim 1, characterized in that: The buckling-restrained energy-dissipating support (2) also includes a buffer cotton plate (2-3), a filler (2-5), and a non-bonding sliding material (2-6).

6. The friction composite buckling restrained energy dissipation brace according to claim 1, characterized in that: The shapes of the end baffle (1-1) and the middle baffle (2-2) are adapted to the shapes of the ports of the outer restraining sleeve (2-4) and the outer sleeve (1-2).

7. A friction composite buckling restrained energy dissipation brace according to claim 2, characterized in that: The two long sides of the main core material (2-1-1) or the auxiliary core material (2-1-2) of the working section are concave inwards, forming trapezoidal concave structures on the two long sides respectively.

8. The friction composite buckling restrained energy dissipation brace according to claim 5, characterized in that: The non-bonding slip material (2-6) covers the core material component (2-1) of the working section, the buffer cotton board (2-3) is a diamond-shaped board, which is arranged in each trapezoidal recessed structure of the main core material (2-1-1) or the auxiliary core material (2-1-2) of the working section, and the shape of the diamond-shaped board is adapted to the trapezoidal recessed structure, and the filler (2-5) is located between the outer restraining sleeve (2-4) and the core material component (2-1).

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