An assembled multi-stage yield buckling-restrained brace

Abstract

The application relates to an assembled multi-stage yield buckling support, which comprises a constraint member, a primary inner core and a secondary inner core which are embedded in the constraint member, the primary inner core and the secondary inner core are connected and extend outwardly through the constraint member, first end plates are arranged at two ends of the primary inner core, second end plates are arranged at two ends of the secondary inner core, the first end plates are connected with the second end plates through connecting shafts, the first end plates are in close contact with the second end plates at one end of the support, and a gap is reserved between the first end plates and the second end plates at the other end of the support, so that multi-stage yield is realized. The application solves the problem that the multi-stage yield buckling support member is difficult to replace in the prior art, and the whole support needs to be replaced when the structure is repaired after the earthquake, and realizes the reuse of the constraint member and the secondary inner core. In addition, the application has simple structure, low processing difficulty and is convenient to popularize.

Description

Technical Field

[0001] This invention belongs to the field of seismic resistance technology in civil engineering structures, specifically relating to a prefabricated multi-stage yield buckling-resistance brace. Background Technology

[0002] Buckling-restrained braces (BRBs) are widely used in building structures as seismic-resistant components. They provide lateral stiffness and reduce structural deformation during minor earthquakes, and dissipate seismic energy to achieve vibration reduction during moderate or major earthquakes. However, under rare earthquakes, the structural stiffness decreases significantly after the core of the BRB yields, potentially leading to weak stories. These weak stories reduce the structure's post-earthquake repair performance and may even cause the structure to collapse at the epicenter. To address these issues, multi-stage yielding BRBs have been proposed in the engineering field. However, components of existing multi-stage yielding BRBs are difficult to replace, and complete replacement may be necessary for post-earthquake repair. Furthermore, existing multi-stage yielding BRBs are complex in construction, expensive, and difficult to widely implement. Summary of the Invention

[0003] This invention provides a prefabricated multi-stage yield buckling-resistance brace, which solves the problems of existing multi-stage yield buckling-resistance brace components being difficult to replace, requiring the entire brace to be replaced during post-earthquake repair, and having a complex structure, high cost, and difficulty in promotion.

[0004] The technical solution of the present invention is as follows:

[0005] A prefabricated multi-stage yield buckling-resistance brace includes a constraint member and a primary inner core and a secondary inner core that can be embedded in the interior of the constraint member and extend outward from the constraint member. The primary inner core can divide the interior of the constraint member into at least two constraint spaces. The secondary inner core is connected to the primary inner core within the constraint space. The primary inner core has a first end plate at both ends, and the secondary inner core has a second end plate at both ends. The first end plate and the second end plate are connected by a connecting shaft. The first end plate and the second end plate at one end of the brace are in close contact, and a gap is reserved between the first end plate and the second end plate at the other end of the brace to achieve multi-stage yielding.

[0006] Furthermore, the cross-section of the primary inner core is in the shape of a straight line, and the two ends of the primary inner core are provided with stiffening ribs perpendicular to the plane on which the primary inner core is located.

[0007] Furthermore, the constraint member includes a first box and a second box with a split structure. The first box has a first side plate at both ends, and the second box has a second side plate at both ends. The first box and the second box are connected on both sides by connecting plates.

[0008] Furthermore, both the first side plate and the second side plate are provided with a first slot through which the primary inner core and the secondary inner core can pass. The first side plate and the second side plate can also form a second slot through which the primary inner core and the secondary inner core can pass after the first box body and the second box body are connected.

[0009] Furthermore, the constraint member is filled with concrete, and the filler has reserved inner core grooves for the primary inner core and the secondary inner core to be embedded.

[0010] Furthermore, the primary inner core has a widened section protruding to both sides in the middle, and the widened section transitions to the non-widened section with a rounded edge.

[0011] Due to the adoption of the above technical solution, the beneficial effects of this application are:

[0012] 1. After an earthquake, the constraint components can be opened by disassembling the connecting plate, making it easy to replace the primary inner core. The secondary inner core can be replaced depending on whether it is involved in the work. After the inner core is replaced, the first and second boxes can be reconnected together through the connecting plate, thus realizing the reuse of the constraint components and the secondary inner core.

[0013] 2. The primary inner core and the secondary inner core are connected by a connecting shaft, which is simple in structure, easy to process, and easy to control costs and promote application. Attached Figure Description

[0014] Figure 1 A schematic diagram of a prefabricated multi-stage yield buckling-resistance brace structure provided for this application;

[0015] Figure 2 An assembly drawing of a prefabricated multi-stage yield buckling-resistance brace structure is provided for this application;

[0016] Figure 3 This is a schematic diagram of the primary core structure described in this application;

[0017] Figure 4 This is a schematic diagram of the secondary core structure described in this application;

[0018] Figure 5 This is a cross-sectional schematic diagram of the constraint member described in this application.

[0019] In the attached image:

[0020] 1. Primary inner core; 1-1. Widened section; 1-2. Arc-shaped edge; 2. Secondary inner core; 3. Constraint component; 4. First end plate; 5. Second end plate; 6. Connecting shaft; 7. First box body; 7-1. First side plate; 7-2. First slot; 8. Second box body; 8-1. Second side plate; 8-2. Second slot; 9. Connecting plate; 10. Filler material; 10-1. Inner core groove; 11. Stiffening rib; 12. Constraint space. Detailed Implementation

[0021] To more clearly illustrate the overall concept of this application, a detailed description is provided below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. Furthermore, it should be understood that the terms "middle," "both ends," "inner," "outer," "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0022] In this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0024] As attached Figure 1 ~Appendix Figure 5As shown, a prefabricated multi-stage yield-restrained buckling brace includes a restraint member 3 and a primary inner core 1 and a secondary inner core 2 that can be embedded in the interior of the restraint member 3 and extend outward from the restraint member 3. The primary inner core 1 can divide the interior of the restraint member 3 into at least two restraint spaces 12. The secondary inner core 2 is connected to the primary inner core 1 within the restraint space 12. The primary inner core has a first end plate 4 at both ends, and the secondary inner core has a second end plate 5 at both ends. The first end plate 4 and the second end plate 5 are connected by a connecting shaft 6. At one end of the brace, the first end plate 4 and the second end plate 5 are in close contact, and at the other end of the brace, a gap is reserved between the first end plate 4 and the second end plate 5. d Furthermore, a gap is also reserved between the first end plate 4 and the end of the connecting shaft 6. d .

[0025] As a preferred embodiment of this application, the primary inner core 1 can be a straight inner core, a cross inner core, or a steel inner core. Straight inner cores, cross inner cores, or steel inner cores are all commonly used inner core forms in the field of buckling bracing.

[0026] In one specific embodiment of the above implementation, the primary inner core 1 adopts a straight inner core, and stiffening ribs 11 perpendicular to the plane of the straight inner core are welded at both ends. In this embodiment, the stiffening ribs 11 and the horizontally placed primary inner core 1 divide the constraint member 3 into four spaces, which are sequentially connected and form a cross shape on the side. Secondary inner cores 2 can be installed in each constraint space 12 according to actual needs. When installing secondary inner cores 2, they should be arranged simultaneously at diagonal positions in the four spaces.

[0027] In a preferred embodiment of the above embodiments, the angle steel and the second end plate 5 are constructed as an integral structure and installed between the first end plate 4. During installation, the two planes of the angle steel are tightly fitted with the stiffening rib 11 and the primary inner core 1, respectively. The connection method between the primary inner core 1 and the secondary inner core 2 is illustrated by the following two embodiments.

[0028] Example 1: In this example, the secondary core 2 is arranged on two diagonally opposite constraint spaces 12. Bolt holes are provided on the first end plate 4 and the second end plate 5, and bolts are used to connect the shaft 6. The first end plate 4 and the second end plate 5 supporting one end are stacked and fastened with bolts. Since the secondary core 2 is relatively short, there is a certain reserved gap between the first end plate 4 and the second end plate 5 at the other end. d Then, connect this end with another bolt, with a gap also reserved between the first end plate 4 and the bolt end. d In the specific design, different lengths of the secondary inner core 2 can be designed to determine the reserved gap between the secondary inner core 2 and the inner core 1 after installation. d .

[0029] The principle of this embodiment is: when the component is under pressure, the first-stage inner core 1 yields first, and the reserved gap between the first end plate 4 and the second end plate 5 supporting one end... d After being pressed together, the first end plate 4 and the second end plate 5 come into contact. At this time, the axial pressure on the support will be transmitted from the first inner core to the second inner core. The second inner core 2 begins to be stressed and yields, so as to achieve two-stage yielding.

[0030] When the component is under tension, the first-stage inner core 1 yields first, and then the first-stage inner core 1 is stretched. This occurs when the pre-reserved gap between the first end plate 4 and the bolt end plate... d After the first core 1 disappears, the axial force of the first core 1 is transmitted to the second core 2 by the bolts. The second core 2 begins to be stressed and yields, thus achieving two-stage yielding.

[0031] Example 2: This example is basically the same as the structure of Example 1. The difference is that in this example, a secondary inner core 2 is provided in each of the four constraint spaces 12. The connection method of the secondary inner core 2 is the same as that in Example 1. Setting multiple secondary inner cores 2 can achieve multi-level yielding.

[0032] As attached Figure 2 and attached Figure 5 As shown, the constraint member 3 includes a first box 7 and a second box 8 with a split structure. The first box 7 has first side plates 7-1 at both ends, and the second box 8 has second side plates 8-1 at both ends. The first box 7 and the second box 8 are welded together on both sides by connecting plates 9. The method of connecting the first box 7 and the second box 8 by connecting plates 9 ensures the integrity of the first box 7 and the second box 8. After the seismic test is completed, the internal components can be replaced and repaired by cutting the weld, which is more convenient and efficient.

[0033] As attached Figure 5 As shown, in a preferred embodiment of this application, both the first side plate 7-1 and the second side plate 8-1 are provided with first slots 7-2 through which stiffening ribs 11 can pass. The first side plate 7-1 and the second side plate 8-1 can also form second slots 8-2 through which transverse stiffening ribs can pass after the first box 7 and the second box 8 are connected. To meet assembly requirements, the widths of the first slots 7-2 and the second slots 8-2 are slightly larger than the thicknesses of the primary inner core 1 and the secondary inner core 2.

[0034] In a preferred embodiment of this application, the constraint member 3 is provided with a filler 10, and the filler 10 is provided with an inner core groove 10-1 for embedding the primary inner core 1 and the secondary inner core 2. The inner core groove 10-1 must be reserved space after the primary inner core 1 and the secondary inner core 2 are installed.

[0035] In one specific embodiment of the above implementation method, the filler 10 is made of concrete and the restraint member 3 is made of steel, forming a steel-concrete composite structure, which helps to reduce manufacturing costs and facilitates product promotion.

[0036] In a preferred embodiment of this application, the primary inner core 1 has a widened section 1-1 that protrudes horizontally to both sides in the middle. The middle of the widened section 1-1 is connected to the primary inner core 1 through an arc-shaped edge 1-2. The widened section is used to fix the relative position of the inner core and the constraint member to prevent the inner core from sliding.

[0037] The above description is merely the basic principle and preferred embodiment of the present invention. Improvements and substitutions made by those skilled in the art based on the present invention are within the scope of protection of the present invention.

Claims

1. A prefabricated multi-stage yield-restrained buckling brace, comprising a restraining member and a primary inner core and a secondary inner core that can be embedded in the interior of the restraining member and extend outward from the restraining member, wherein the primary inner core can divide the interior of the restraining member into at least two restraining spaces, and the secondary inner core is connected to the primary inner core within the restraining space, characterized in that, The primary inner core is provided with a first end plate at both ends, and the secondary inner core is provided with a second end plate at both ends. The first end plate and the second end plate are connected by a connecting shaft. The first end plate and the second end plate at one end of the support are in close contact, and a gap is reserved between the first end plate and the second end plate at the other end of the support to achieve multi-level yielding. The primary inner core has a widened section protruding to both sides in the middle, and the widened section transitions to the non-widened section with a rounded edge; The cross-section of the primary inner core is in the shape of a straight line, and the two ends of the primary inner core are provided with stiffening ribs perpendicular to the plane on which the primary inner core is located. The constraint member includes a first box and a second box with a split structure. The first box has a first side plate at both ends, and the second box has a second side plate at both ends. The first box and the second box are connected on both sides by connecting plates.

2. The prefabricated multi-stage yield-resistance buckling brace according to claim 1, characterized in that, Both the first side plate and the second side plate are provided with a first slot through which the primary inner core and the secondary inner core can pass. The first side plate and the second side plate can also form a second slot through which the primary inner core and the secondary inner core can pass after the first box body and the second box body are connected.

3. The prefabricated multi-stage yield-resistance buckling brace according to claim 2, characterized in that, The constraint member is filled with a filling material, and the filling material has reserved inner core grooves for the primary inner core and the secondary inner core to be embedded.

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