A bolt-free series-connected double-yield-point buckling-restrained brace

Abstract

The present invention discloses a bolt-free series-connected double-yield-point buckling-restrained brace, comprising: a core plate (1), the core plate (1) including n yield sections and n + 1 connection sections, the yield sections and the connection sections being arranged at intervals and in series, where n is a positive integer; restraint members (4), two of the restraint members (4) being respectively arranged on both sides of the largest surface area of the core plate (1), the length of the restraint members (4) being less than the length of the core plate (1); limit protrusions, the limit protrusions being arranged in the width extension direction of the connection sections; limit plates, two limit plates being in a group, the two limit plates in each group being respectively arranged on both sides of the limit protrusions along the yield direction of the core plate (1), and both ends of the limit plates being fixedly connected to the two restraint members (4). Through the creative design, one component, i.e., the limit plate, can simultaneously achieve two functions, greatly reducing the production difficulty while improving the product performance.

Description

Technical Field

[0001] The present invention relates to the field of construction, and particularly to a bolt-free series-connected double-yield-point buckling-restrained brace. Background Art

[0002] A buckling-restrained brace, also known as an anti-buckling brace or BRB, can provide a large lateral stiffness and bearing capacity for a frame or bent structure, and the structural system using it as a brace is widely applied in building structures. A buckling-restrained brace is a member that yields under compression without buckling, and its structural composition can be analyzed from the transverse and longitudinal directions. The transverse part mainly includes an energy-dissipating inner core plate member, an outer restraint member (steel pipe, concrete, etc.), and a non-bonding material, etc.; the longitudinal composition mainly includes a restrained yield segment, a restrained non-yield segment, an unrestrained non-yield segment, etc. Traditional buckling-restrained braces usually use a large number of bolts to achieve the restraint of the restrained yield segment and the restrained non-yield segment, resulting in high requirements for the overall processing accuracy of the device and high cost, which affects the popularization and application. Summary of the Invention

[0003] The purpose of the present invention is to provide a bolt-free series-connected double-yield-point buckling-restrained brace with a simple structure and convenient use.

[0004] To solve the above problems, the following technical solutions are adopted:

[0005] A bolt-free series-connected double-yield-point buckling-restrained brace includes: a core plate, the core plate includes n yield segments and n + 1 connection segments, the yield segments and the connection segments are fixedly arranged, the yield segments and the connection segments are respectively spaced and connected in series, where n is a positive integer; restraint members, there are two restraint members and they are respectively arranged on both sides of the maximum surface area of the core plate, the length of the restraint members is less than the length of the core plate; limit protrusions, the limit protrusions are arranged in the width extension direction of the connection segments, and at least one of the limit protrusions is arranged on each connection segment; limit plates, the limit plates are in groups of two, each group of limit plates corresponds to a limit protrusion one by one, the two limit plates in each group are respectively arranged on both sides of the limit protrusion along the yield direction of the core plate, and both ends of the limit plates are fixedly connected to the two restraint members respectively, and the limit plates are used to limit the limit of the limit protrusion moving along the yield direction of the core plate and at the same time used to connect the two restraint members into one body.

[0006] Optionally, the core plate includes two yield segments, namely a first yield segment and a second yield segment. The cross-sectional area and length of the first yield segment are both smaller than those of the second yield segment. By designing the cross-sectional area and length, the first yield segment and the second yield segment have different yield forces. Through the design of the limiting plate and the limiting protrusion, the deformation limits of the first yield segment and the second yield segment are controlled, enabling the first yield segment and the second yield segment to achieve yield switching and realizing the double yield point effect. The first yield segment can be designed to yield under small earthquakes, and the second yield segment can be designed to yield under medium and large earthquakes, thereby achieving energy dissipation under small, medium, and large earthquakes and improving the energy dissipation capacity and material utilization efficiency. When the core plate includes two yield segments, the core plate includes three connecting segments, namely a first connecting segment, a second connecting segment, and a third connecting segment. Preferably, limiting protrusions are provided on both sides of the connecting segment in the width extension direction. Among them, the limiting protrusion provided on the first connecting segment is the first limiting protrusion, the limiting protrusion provided on the second connecting segment is the second limiting protrusion, and the limiting protrusion provided on the third connecting segment is the third limiting protrusion. The limiting plates are in groups of two, and each group of limiting plates corresponds to the limiting protrusions one by one. The limiting plate corresponding to the first limiting protrusion is the first limiting plate, the limiting plate corresponding to the second limiting protrusion is the second limiting plate, and the limiting plate corresponding to the third limiting protrusion is the third limiting plate. The connecting segments and the yield segments are arranged at intervals and in series. At this time, the core plate includes, from right to left in sequence: a first connecting segment, a first yield segment, a second connecting segment, a second yield segment, and a third connecting segment, where the positions of the first yield segment and the second yield segment can be interchanged.

[0007] Optionally, it further includes: reinforcing plates. Multiple reinforcing plates are provided, and both ends of the reinforcing plates are fixedly connected to the two restraint members respectively. The reinforcing plates are used to enhance the stability of the two restraint members connected as a whole.

[0008] Optionally, a gap is provided between the restraint member and the core plate, and the gap is filled with a non-bonding material.

[0009] Optionally, the restraint member includes a channel steel and stiffening ribs fixedly arranged inside the channel steel.

[0010] Optionally, the restraint member includes a square steel, and the square steel is filled with concrete.

[0011] Optionally, the cross-sectional shape of the end of the core plate is a straight shape, a cross shape, an H shape, or a king shape.

[0012] Optionally, both the limiting plate and the reinforcing plate are made of steel plates.

[0013] Optionally, the cross-sectional shapes of the limiting plate and the reinforcing plate are a straight shape, an L shape, or a C shape.

[0014] Optionally, the yield segment, the connecting segment, and the limiting protrusion are integrally formed.

[0015] The above technical solution of the present invention has the following beneficial technical effects: The design that both ends of the limiting plate are fixedly connected to the constraint members on both sides enables the limiting plate to fix the constraint members on both sides into one body in various ways (such as welding, etc.) to realize the constraint of the core plate. At the same time, the limiting plate can also limit the limit of the limiting protrusion moving along the yield direction of the core plate. When n is greater than or equal to 2, since the limit of the limiting protrusion moving along the yield direction of the core plate is restricted, it effectively enables the switching of the rigid or elastoplastic deformation energy dissipation state of each yield segment. Through the creative design, a single component, the limiting plate, can achieve two functions simultaneously, greatly reducing the production difficulty while improving the product performance. Brief Description of the Drawings

[0016] Figure 1 is the exploded structure schematic diagram of the present invention;

[0017] Figure 2 is the assembled structure schematic diagram of the present invention;

[0018] Wherein: 1 - core plate, 11 - first yield segment, 12 - second yield segment, 13 - first connection segment, 14 - second connection segment, 15 - third connection segment, 16 - first limiting protrusion, 17 - second limiting protrusion, 18 - third limiting protrusion, 21 - first limiting plate, 22 - second limiting plate, 23 - third limiting plate, 3 - reinforcing plate, 4 - constraint member. Detailed Embodiments

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0020] A bolt-free series-connected double-yield-point buckling-restrained brace, comprising: a core plate 1, the core plate 1 includes n yield sections and n + 1 connection sections, the yield sections and the connection sections are fixedly arranged, the yield sections and the connection sections are respectively arranged at intervals and in series, where n is a positive integer; a restraint member 4, there are two restraint members 4 and they are respectively arranged on both sides of the maximum surface area of the core plate 1, the length of the restraint member 4 is less than the length of the core plate 1; a limit protrusion, the limit protrusion is arranged in the width extension direction of the connection section, and at least one limit protrusion is arranged on each connection section; a limit plate, the limit plates are in groups of two, each group of limit plates corresponds to the limit protrusion one by one, the two limit plates in each group are respectively arranged on both sides of the limit protrusion along the yield direction of the core plate 1, and both ends of the limit plate are fixedly connected to the two restraint members 4 respectively, and the limit plate is used to limit the limit of the limit protrusion moving along the yield direction of the core plate 1 and at the same time is used to connect the two restraint members 4 into one body. The design that both ends of the limit plate are fixedly connected to the restraint members 4 on both sides enables the limit plate to fix the restraint members 4 on both sides into one body in various ways (such as welding, etc.) to realize the restraint of the core plate 1. At the same time, the limit plate can also limit the limit of the limit protrusion moving along the yield direction of the core plate 1. When n is greater than or equal to 2, since the limit of the limit protrusion moving along the yield direction of the core plate 1 is restricted, the rigid or elastoplastic deformation energy dissipation state of each yield section can be effectively switched. Through the creative design, a single component of the limit plate can achieve two functions at the same time, greatly reducing the production difficulty while improving the product performance. The lengths and cross-sections of each yield section can be independently designed respectively to realize the decoupling of the bearing capacity design and the stiffness design, greatly improving the design flexibility and product applicability.

[0021] In an alternative embodiment, the core plate 1 includes two yield segments, namely a first yield segment 11 and a second yield segment 12. The cross-sectional area and length of the first yield segment 11 are both smaller than those of the second yield segment 12. By designing the cross-sectional area and length, the first yield segment 11 and the second yield segment 12 have different yield forces. Through the design of the limiting plate and the limiting protrusions, the deformation limits of the first yield segment 11 and the second yield segment 12 are controlled, enabling the first yield segment 11 and the second yield segment 12 to achieve yield switching and realizing the double yield point effect. The first yield segment 11 can be designed to yield under small earthquakes, and the second yield segment 12 can be designed to yield under medium and large earthquakes, thereby achieving energy dissipation under both small earthquakes and medium / large earthquakes, improving the energy dissipation capacity and material utilization efficiency. When the core plate 1 includes two yield segments, the core plate 1 includes three connecting segments, namely a first connecting segment 13, a second connecting segment 14, and a third connecting segment 15. Preferably, limiting protrusions are provided on both sides of the connecting segments in the width extension direction. Among them, the limiting protrusion provided on the first connecting segment 13 is the first limiting protrusion 16, the limiting protrusion provided on the second connecting segment 14 is the second limiting protrusion 17, and the limiting protrusion provided on the third connecting segment 15 is the third limiting protrusion 18. The limiting plates are grouped in pairs, and each pair of limiting plates corresponds one-to-one with the limiting protrusions. The limiting plate corresponding to the first limiting protrusion 16 is the first limiting plate 21, the limiting plate corresponding to the second limiting protrusion 17 is the second limiting plate 22, and the limiting plate corresponding to the third limiting protrusion 18 is the third limiting plate 23. The connecting segments and the yield segments are arranged at intervals and in series. At this time, the core plate 1 includes, from right to left in sequence: a first connecting segment 13, a first yield segment 11, a second connecting segment 14, a second yield segment 12, and a third connecting segment 15, where the positions of the first yield segment 11 and the second yield segment 12 can be interchanged. During the working process, when the whole is in tension until the first yield segment 11 yields (the first yield occurs), at this time, the second limiting protrusion 17 has not contacted the second limiting plate 22, and the third limiting protrusion 18 has not contacted the third limiting plate 23; continue to be in tension until the second limiting protrusion 17 contacts the second limiting plate 22, and the deformation of the first yield segment 11 no longer increases. At this time, the second yield segment 12 has not yielded, and the third limiting protrusion 18 has not contacted the third limiting plate 23; continue to be in tension until the second yield segment 12 yields (the second yield occurs), at this time, the third limiting protrusion 18 has not contacted the third limiting plate 23; continue to be in tension until the third limiting protrusion 18 contacts the third limiting plate 23, thus completing the working mission; the principle is the same when in compression, and according to the traditional BRB principle, the compression performance is the same as the tension performance. The first yield segment 11 yields earlier than the second yield segment 12. After the first yield segment 11 yields and the second limiting protrusion 17 contacts the second limiting plate 22, and before the second yield segment 12 yields, there is an ascending section in the support stiffness, avoiding the stiffness degradation when the support just yields, which is beneficial to reducing the overall structural deformation and improving the seismic capacity of the structure.

[0022] In an alternative embodiment, it further includes: a reinforcing plate 3. A plurality of reinforcing plates 3 are provided. Both ends of the reinforcing plate 3 are fixedly connected to two constraint members 4 respectively. The reinforcing plate 3 is used to enhance the stability of the connection of the two constraint members 4 as a whole.

[0023] In an alternative embodiment, a gap is provided between the constraint member 4 and the core plate 1, and a non-bonding material is filled in the gap.

[0024] In an alternative embodiment, the constraint member 4 includes a channel steel and stiffeners fixedly arranged inside the channel steel.

[0025] In an alternative embodiment, the constraint member 4 includes a square steel, and concrete is filled in the square steel.

[0026] In an alternative embodiment, the cross-sectional shape of the end portion of the core plate 1 is a straight shape, a cross shape, an H shape, or a king shape.

[0027] In an alternative embodiment, both the limiting plate and the reinforcing plate 3 are made of steel plates.

[0028] In an alternative embodiment, the cross-sectional shapes of the limiting plate and the reinforcing plate 3 are a straight shape, an L shape, or a C shape.

[0029] In an alternative embodiment, the yield section, the connection section, and the limiting protrusion are integrally formed.

Claims

1. A buckling-restrained brace device, characterized in that, Comprising: A core plate (1), the core plate (1) includes n yield sections and n + 1 connection sections, the yield sections and the connection sections are fixedly arranged, the yield sections and the connection sections are spaced and arranged in series, where n is a positive integer; Constraint members (4), there are two constraint members (4) and they are respectively arranged on both sides of the largest surface area of the core plate (1), the length of the constraint member (4) is less than the length of the core plate (1); Limit protrusions, the limit protrusions are arranged in the width extension direction of the connection section, and at least one limit protrusion is arranged on each connection section; Limit plates, the limit plates are in groups of two, each group of limit plates corresponds to each limit protrusion one by one, the two limit plates in each group are respectively arranged on both sides of the limit protrusion along the yield direction of the core plate (1), and both ends of the limit plates are fixedly connected to the two constraint members (4), and the limit plates are used to limit the limit of the limit protrusion moving along the yield direction of the core plate (1) and at the same time are used to connect the two constraint members (4) into one body; Wherein, n is greater than or equal to 2.

2. The buckling-restrained brace device according to claim 1, wherein The core plate (1) includes 2 yield sections, namely a first yield section and a second yield section, and the cross-sectional area and length of the first yield section are both smaller than those of the second yield section.

3. The buckling-restrained bracing device according to claim 1, wherein Further comprising: Reinforcing plates (3), a plurality of reinforcing plates (3) are provided, and both ends of the reinforcing plates (3) are fixedly connected to the two constraint members (4), and the reinforcing plates are used to enhance the stability of connecting the two constraint members (4) into one body.

4. The buckling-restrained bracing device according to claim 1, wherein, A gap is provided between the constraint member (4) and the core plate (1), and the gap is filled with a non-bonding material.

5. The buckling-restrained brace device according to claim 1, wherein, The constraint member (4) includes a channel steel and stiffening ribs fixedly arranged in the channel steel.

6. The buckling-restrained bracing device according to claim 1, wherein The constraint member (4) includes a square steel, and the square steel is filled with concrete.

7. The buckling-restrained bracing device according to claim 1, wherein, The end cross-sectional shape of the core plate (1) is a straight shape, a cross shape, an H shape or a king shape.

8. The buckling-restrained brace device according to claim 1, characterized in that, Both the limit plates and the reinforcing plates (3) are made of steel plates.

9. The buckling-restrained bracing device according to claim 1, wherein The cross-sectional shapes of the limit plates and the reinforcing plates (3) are a straight shape, an L shape or a C shape.

10. The buckling-restrained bracing device according to claim 1, wherein The yield sections, the connection sections and the limit protrusions are integrally formed.

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