CN216640924U

CN216640924U - Double-step yielding buckling restrained brace

Info

Publication number: CN216640924U
Application number: CN202220949745.2U
Authority: CN
Inventors: 赵俊贤; 何之秋; 郭盈利; 李晶; 景广; 韩伟; 黄艳斌; 迟雪晶
Original assignee: Beijing Brace Damping Engineering Technology Co ltd
Current assignee: Beijing Brace Damping Engineering Technology Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-05-31
Anticipated expiration: 2032-04-24

Abstract

The utility model provides a double-step yielding buckling restrained brace, which comprises a core plate, a restrained sleeve, concrete and an outer sleeve, wherein the core plate is provided with a plurality of buckling parts; the constraint sleeve is sleeved on the periphery of the core plate, and concrete is filled between the core plate and the constraint sleeve; the core plate is divided into a first yielding section and a second yielding section along the length direction, the radial size of the first yielding section is smaller than that of the second yielding section, and the outer sleeve is sleeved on the outer side, corresponding to the first yielding section, of the constraint sleeve; be provided with limit baffle on the first surrender section, all be provided with the bar hole on restraint sleeve, the outer sleeve, limit baffle passes two bar holes in proper order, and on the length direction along the core, the size in bar hole is greater than the size of limit baffle. According to the double-stage yielding buckling restrained brace, the first yielding section, the second yielding section, the outer sleeve, the limiting baffle, the strip-shaped holes and other combined structures are utilized, the yielding brace is decomposed into double-stage parts with different yielding limits, and the yielding brace range of the structure is widened.

Description

Double-step yielding buckling restrained brace

Technical Field

The utility model relates to the technical field of energy consumption equipment, in particular to a double-order yielding buckling restrained brace.

Background

The Buckling restrained brace is also called as a Buckling Restrained Brace (BRB), is a technology integrating a structural member and an energy consumption member, has the advantages of high bearing capacity, strong deformability and the like, solves the problem of pressure instability of a common steel brace, can ensure the requirement of a ductile member in anti-seismic design, ensures safe and reliable structure, and improves safe storage for a main structure. The greatest advantage of the buckling restrained brace compared to a steel brace is the separation of its own load bearing capacity from stiffness.

The common support needs to consider the stability of the common support, so that the rigidity of the cross section and the support is overlarge, the rigidity of the structure is overlarge, the earthquake force is overlarge indirectly, and an inevitable vicious circle is formed. The buckling restrained brace can effectively avoid the phenomenon, and the requirement of the structure on the bearing capacity is met under the condition that the structural rigidity is not increased.

However, the existing buckling restrained brace only has a yielding function within a single range, and when the buckling restrained brace exceeds a set range, the buckling restrained brace loses the function, so that the use requirements of people cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-step yielding buckling restrained brace, which is helpful for solving the technical problem.

The utility model is realized by the following steps:

a double-step yielding buckling restrained brace comprises a core plate, a restrained sleeve, concrete and an outer sleeve; the constraint sleeve is sleeved on the periphery of the core plate, and the concrete is filled between the core plate and the constraint sleeve; the core plate is divided into a first yielding section and a second yielding section along the length direction, the radial dimension of the first yielding section is smaller than that of the second yielding section, and the outer sleeve is sleeved on the outer side of the constraint sleeve corresponding to the first yielding section; be provided with limit baffle on the first surrender section, the restraint sleeve all be provided with the bar hole on the outer sleeve, limit baffle passes two in proper order the bar hole, and is following on the length direction of core, the size in bar hole is greater than the size of limit baffle.

The double-stage yielding buckling restrained brace divides the core plate into a first yielding section and a second yielding section with different yielding limits, and is matched with a combined structure of the outer sleeve, the limiting baffle, the strip-shaped holes and the like, when the limiting baffle is not in axial contact with the outer sleeve, the first yielding section firstly yields, the second yielding section is in an elastic state, and the axial stiffness is two different cross-section BRB strings; when the limiting baffle is in axial contact with the strip-shaped hole of the outer sleeve, the first yielding section is limited and cannot deform, the supporting axial force is transmitted to the second yielding section through the limiting baffle and the outer sleeve, and only the second yielding section deforms at the moment.

Further, the core board is a straight core board. The technical effects are as follows: since the core plate is provided with the limit baffle, it is preferable to use a linear core plate, and the limit baffle is provided on the side wall of the linear core plate. Of course, the core plate with the same function and capable of being fixedly provided with the limiting baffle is also feasible by adopting the cross-shaped core plate or other types of core plates.

Furthermore, a stiffening rib plate is also arranged on the core plate; the stiffening rib plates are vertically arranged on the side walls at two ends of the core plate. The technical effects are as follows: the stiffening rib plates are arranged on the side walls of the two ends of the linear core plate, so that the welding action surface of the node and the yielding buckling restrained brace can be increased, and the yielding bracing effect is improved.

Further, the radial dimension of the second yielding segment is greater than or equal to twice the radial dimension of the first yielding segment. The technical effects are as follows: the radial sizes of the two yielding sections are different, so that the yielding limits are different, and the core plate changes an integral yielding support structure into a double-step yielding support structure.

Further, the connecting section between the first yielding section and the second yielding section is smoothly arranged. The technical effects are as follows: the smooth arrangement of the connecting sections can reduce stress concentration and prevent the support structure from breaking in the sudden change size between two yielding sections of different sizes.

Further, a connecting core plate is arranged between the first yielding section and the second yielding section, and the radial dimension of the connecting core plate is larger than that of the second yielding section. The technical effects are as follows: the core plate is connected with two parts with different yield limits, and the radial size of the core plate is larger than that of the second yield section, so that the core plate can be prevented from being broken and failed at the position.

Furthermore, the outer walls of the core plate and the stiffening rib plates are provided with non-adhesive layers. The technical effects are as follows: the non-adhesive layer can prevent the core plate, the stiffening rib plates and the concrete from rubbing, ensure that the borne load is completely borne by the core plate, and restrain the sleeve, the concrete and the outer sleeve to only restrain the core plate from buckling under pressure, so that the core plate can be buckled under tension and pressure.

Furthermore, plugging plates are arranged at two ends of the constraint sleeve. The technical effects are as follows: the plugging plate is used for limiting the concrete loss along the length direction of the core plate in the processes of filling and fixing the concrete.

Further, a first flange plate is arranged on the end face, far away from the second yielding section, of the outer sleeve, and the first flange plate is fixedly connected with the first yielding section. The technical effects are as follows: the first flange plate is used for transmitting the load of the core plate and the outer sleeve to an external bearing structural member.

Further, a second flange plate is arranged on the end face, far away from the first yielding section, of the second yielding section. The technical effects are as follows: the second flange plate is used to transfer the load of the core plate to an external load-bearing structural member.

The utility model has the beneficial effects that:

according to the double-stage yielding buckling restrained brace, the first yielding section, the second yielding section, the outer sleeve, the limiting baffle, the strip-shaped holes and other combined structures are utilized, the yielding brace is decomposed into double-stage parts with different yielding limits, and the yielding brace range of the structure is widened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an external structure of a two-step yielding buckling restrained brace provided by the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 2;

fig. 6 is a plan view of a core component of a double-step yielding buckling restrained brace provided by the present invention.

Icon: 100-a rectilinear core plate; 110-a first yield segment; 120-a second yield segment; 130-a stiffening rib; 140-connecting the core boards; 200-a constraining sleeve; 300-concrete; 400-an outer sleeve; 500-limit baffle; 600-strip shaped holes; 700-plugging plate; 800-a first flange plate; 900-second flange plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention that are generally described and illustrated in the figures can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

FIG. 1 is a schematic diagram of an external structure of a two-step yielding buckling restrained brace provided by the present invention; FIG. 2 is a sectional view taken along line A-A of FIG. 1; FIG. 3 is a sectional view taken along line B-B of FIG. 2; FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2; FIG. 5 is a cross-sectional view taken along line D-D of FIG. 2; fig. 6 is a plan view of the core member of the double-step yielding buckling restrained brace provided by the present invention. Referring to fig. 1 to 6, the present embodiment provides a double-step yielding buckling restrained brace, which includes a core plate, a restraining sleeve 200, concrete 300 and an outer sleeve 400; the constraint sleeve 200 is sleeved on the periphery of the core plate, and the concrete 300 is filled between the core plate and the constraint sleeve 200; the core plate is divided into a first yielding section 110 and a second yielding section 120 along the length direction, the radial dimension of the first yielding section 110 is smaller than that of the second yielding section 120, and the outer sleeve 400 is sleeved on the outer side of the constraint sleeve 200 corresponding to the first yielding section 110; be provided with limit baffle 500 on the first section 110 of surging, restraint sleeve 200 all be provided with bar hole 600 on the outer sleeve 400, limit baffle 500 passes two in proper order bar hole 600, and is following on the length direction of core board, the size in bar hole 600 is greater than limit baffle 500's size.

In the above structure, the core plate is used for connecting other members and bears an additional load to be applied to the building due to an earthquake or the like.

In the actual use process, the initial load is borne by the first yielding section 110 with a smaller yielding limit, after the load is increased to a certain value, the first yielding section 110 yields, and the structure for bearing the load is changed to the second yielding section 120.

Wherein the interaction of the constraining sleeve 200, the outer sleeve 400, the slotted hole 600, and the limit stop 500 disposed on the first yielding segment 110 causes the load to be transferred from the first yielding segment 110 to the second yielding segment 120.

Wherein, in the length direction along the core board, the size of bar hole 600 is greater than limit baffle 500's size, and bar hole 600 leaves along the axial compression space of core board for limit baffle 500 promptly.

The working principle of the double-step yielding buckling restrained brace of the embodiment is as follows:

the core plate is divided into a first yielding section 110 and a second yielding section 120 with different yielding limits by the double-stage yielding buckling restrained brace, and the core plate is matched with the outer sleeve 400, the limit baffle 500, the strip-shaped hole 600 and other combined structures, when the limit baffle 500 is not in axial contact with the outer sleeve 400, the first yielding section 110 yields firstly, the second yielding section 120 is in an elastic state, and the axial stiffness is two BRB strings with different sections; when the limit baffle 500 is in axial contact with the strip-shaped hole 600 of the outer sleeve 400, the first yielding segment 110 is limited and cannot deform, the axial force is transmitted to the second yielding segment 120 through the limit baffle 500 and the outer sleeve 400, and only the second yielding segment 120 deforms at the moment.

In at least one preferred embodiment, as shown in fig. 1 to 6, the core board is a straight core board 100. In this embodiment, since the position-limiting baffle 500 is provided on the core plate, the linear core plate 100 is preferably used, and the position-limiting baffle 500 is provided on the side wall of the linear core plate 100. Of course, if a cross-shaped core plate or other types of core plates are adopted, a core plate with the same function and capable of being fixedly provided with the limit baffle 500 is also feasible.

In at least one preferred embodiment, as shown in fig. 1, fig. 2, fig. 4 to fig. 6, a stiffening rib plate 130 is further disposed on the core plate; the stiffening ribs 130 are vertically provided on the side walls of both ends of the core. In this embodiment, the stiffening ribs 130 are disposed on the sidewalls of the two ends of the linear core plate 100, so as to increase the welding action surface between the node and the yielding buckling restrained brace, and improve the yielding bracing effect.

In at least one preferred embodiment, further, as shown in fig. 3 and 6, the radial dimension of the second yielding segment 120 is greater than or equal to twice the radial dimension of the first yielding segment 110. In this embodiment, the radial dimensions of the two yielding segments are different, and the yielding limits are different, and the core plate changes an integral yielding support structure into a double-step yielding support structure.

In at least one preferred embodiment, further, as shown in fig. 3 and 6, the connection section between the first yielding section 110 and the second yielding section 120 is smoothly arranged. In this embodiment, the smooth arrangement of the connecting sections reduces stress concentrations and prevents the support structure from breaking in the abrupt change in size between two different sized yielding sections.

In at least one preferred embodiment, as shown in fig. 3 and 6, a connecting core plate 140 is further disposed between the first yielding segment 110 and the second yielding segment 120, and a radial dimension of the connecting core plate 140 is greater than a radial dimension of the second yielding segment 120. In this embodiment, connecting the core plate 140 serves to connect two portions of different yield strength having a radial dimension greater than the second yield segment 120, where failure of the core plate at break can be avoided.

In at least one preferred embodiment, as shown in fig. 1 to 6, the core plate and the outer walls of the stiffening ribs 130 are provided with non-adhesive layers. In this embodiment, the unbonded layer prevents the core, the stiffening ribs 130, and the concrete 300 from rubbing against each other, ensuring that the load is borne by the core entirely, and the constraining sleeve 200, the concrete 300, and the outer sleeve 400 only constrain the core from buckling under compression, allowing the core to yield under both tension and compression.

In at least one preferred embodiment, further, as shown in fig. 2 and 3, blocking plates 700 are disposed on both ends of the constraining sleeve 200. In this embodiment, the blocking plate 700 serves to restrict the loss of the concrete 300 in the length direction of the core plate during the filling of the concrete 300 and the fixing of the concrete 300.

In at least one preferred embodiment, as shown in fig. 2 and 3, a first flange plate 800 is disposed on an end surface of the outer sleeve 400 away from the second yielding segment 120, and the first flange plate 800 is fixedly connected with the first yielding segment 110. The end face of the second yielding segment 120 away from the first yielding segment 110 is provided with a second flange plate 900. In this embodiment, the first flange plate 800 is used to transfer the load of the core plate and outer sleeve to the external load-bearing structure. The second flange plate 900 serves to transmit the load of the core plate to an external load-bearing structural member.

Specifically, the manufacturing procedure of the double-step yielding buckling restrained brace is as follows:

firstly, welding the I-shaped core plate 100, the stiffening ribs 130 and the limit baffle 500 together to form a core member, and coating an unbonded material on the outer side of the core member to form an unbonded layer.

And secondly, connecting the core component coated with the non-adhesive material, the constraint sleeve 200 and the outer sleeve 400 according to the position of the limit baffle 500, sealing one side port of the constraint sleeve by a plugging plate 700, pouring concrete 300 or mortar into the constraint sleeve, and forming a second-order yield component after the mortar is coagulated and molded.

And thirdly, arranging a first flange plate 800 and a second flange plate 900 at two ends of the second-order yield component respectively, and connecting the first flange plate 800 and the second flange plate 900 with a beam column structure to be supported to complete the assembly of the product.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The double-step yielding buckling restrained brace is characterized by comprising a core plate, a restraining sleeve (200), concrete (300) and an outer sleeve (400); the constraint sleeve (200) is sleeved on the periphery of the core plate, and the concrete (300) is filled between the core plate and the constraint sleeve (200); the core plate is divided into a first yielding section (110) and a second yielding section (120) along the length direction, the radial dimension of the first yielding section (110) is smaller than that of the second yielding section (120), and the outer sleeve (400) is sleeved on the outer side of the constraint sleeve (200) corresponding to the first yielding section (110); be provided with limit baffle (500) on first surrender section (110), restraint sleeve (200) all be provided with bar hole (600) on outer sleeve (400), limit baffle (500) pass two in proper order bar hole (600), and along on the length direction of core, the size in bar hole (600) is greater than limit baffle (500)'s size.

2. The double-step yielding buckling restrained brace of claim 1, wherein the core plate is a straight core plate (100).

3. The double-step yielding buckling restrained brace of claim 2, wherein the core plate is further provided with stiffening ribs (130); the stiffening rib plates (130) are vertically arranged on the side walls of the two ends of the core plate.

4. The dual-step yielding buckling-restrained brace of claim 1, wherein the radial dimension of said second yielding segment (120) is greater than or equal to twice the radial dimension of said first yielding segment (110).

5. The dual-step yielding buckling-restrained brace of claim 1, wherein a connecting section between the first yielding section (110) and the second yielding section (120) is smoothly arranged.

6. The double-step yielding buckling-restrained brace of claim 5, wherein a connecting core plate (140) is further disposed between the first yielding segment (110) and the second yielding segment (120), the connecting core plate (140) having a radial dimension greater than that of the second yielding segment (120).

7. The double-step yielding buckling restrained brace of claim 3, wherein the core plate and the stiffening ribs (130) are provided with an unbonded layer on the outer wall.

8. The double-step yielding buckling restrained brace of claim 1, wherein the restraining sleeve (200) is provided with blanking plates (700) on both ends.

9. The double-yield buckling-restrained brace of claim 1, wherein a first flange plate (800) is arranged on an end face of the outer sleeve (400) far away from the second yield segment (120), and the first flange plate (800) is fixedly connected with the first yield segment (110).

10. The double-step yielding buckling restrained brace of claim 1, wherein a second flange plate (900) is provided on an end face of the second yielding segment (120) distal from the first yielding segment (110).