CN216428644U - Buckling restrained brace with negative Poisson ratio effect - Google Patents

Abstract

The utility model discloses an anti-buckling support with negative poisson's ratio effect, including outer tube and interior sleeve pipe, wherein, the outer tube has multiseriate through-hole, and each row of through-hole includes a plurality of indent hexagonal holes, and the outer tube suit has the clearance in interior sheathed tube outside and between the two. The utility model discloses a buckling restrained brace with negative poisson's ratio effect, outer tube have a plurality of indent hexagonal holes to make it have negative poisson's ratio effect, expand when drawing, shrink when pressurized, draw the bloated characteristic promptly; when the two ends of the buckling-restrained brace are subjected to tensile force, the outer sleeve is expanded, namely the diameter is increased; when the two ends of the buckling-restrained brace are under pressure, the outer sleeve contracts, namely the diameter of the outer sleeve is reduced, the inner sleeve is wrapped, the outer sleeve can be restrained by the inner sleeve to deform, the outer sleeve generates plastic deformation energy consumption in the process that the buckling-restrained brace is pulled or pressed, and buckling-restrained energy consumption is realized. And only the inner sleeve and the outer sleeve are arranged, so that the structure is light, and the deformation condition of the outer sleeve can be directly observed.

Description

A Buckling Bracing with Negative Poisson's Ratio Effect

technical field

The utility model relates to the technical field of construction engineering, in particular to an anti-buckling bracing with negative Poisson's ratio effect.

Background technique

With the in-depth study of seismic isolation design theory, anti-buckling bracing, as an effective displacement-dependent damper, has a good passive energy dissipation effect, and has been widely used in building structures and bridges.

The anti-buckling bracing is a new type of bracing, which usually consists of three parts: the inner core steel core, the outer restraining sleeve and the non-bonded isolation material between the two. The inner core steel core is connected to the main structure and is the main force-bearing member, providing lateral stiffness to the structure within the elastic deformation range. When the tensile and compressive load reaches a certain level, the inner core steel core yields and consumes seismic energy through hysteretic deformation. Peripheral restraint sleeves provide lateral restraint to the inner core, preventing compressive buckling of the inner core.

The anti-buckling support structure dissipates energy through the plastic deformation of the inner core member. The overall stability of the circular tube-shaped anti-buckling support is better, and it can be processed by the finished circular tube. The tube also constrains the form of the middle energy-consuming circular tube, which is heavy in structure and complicated in the design process; the use of double-round tube anti-buckling braces is prone to failure of end connections or transition sections, and local buckling of energy-consuming steel tubes.

How to change the current situation in the prior art that the simultaneous support inside and outside the buckling-resistant support structure easily causes structural damage and reduces the reliability of the buckling-resistant support structure has become an urgent problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide an anti-buckling support with negative Poisson's ratio effect, so as to solve the problems existing in the prior art, prolong the service life of the anti-buckling support structure, and improve the reliability of the anti-buckling support structure.

In order to achieve the above purpose, the utility model provides the following solutions: the utility model provides an anti-buckling bracing with negative Poisson's ratio effect, including:

an outer sleeve, the outer sleeve has multiple rows of through holes, the multiple rows of the through holes are arranged parallel to the axis of the outer sleeve, the multiple rows of the through holes are evenly distributed around the axis of the outer sleeve, and the adjacent rows of the through holes The through holes are arranged in a staggered manner; the through holes in each row include a plurality of concave hexagonal holes, the concave hexagonal holes include two connected isosceles trapezoidal holes, and the upper part of the two isosceles trapezoidal holes The bottoms are connected to form the concave hexagonal hole, the height of the isosceles trapezoid hole is parallel to the axis of the outer sleeve, and the upper bottom of the isosceles trapezoid hole is connected to the bottom of the isosceles trapezoid hole in the adjacent row. the bottom is flush;

An inner sleeve, the outer sleeve is sleeved on the outside of the inner sleeve with a gap therebetween.

Preferably, the inner sleeve includes a main body portion and a connecting portion disposed at both ends of the main body portion, and the diameter of the connecting portion is larger than that of the main body portion.

Preferably, the connecting portion at one end of the inner sleeve is connected to the outer sleeve, and the connecting portion at the other end of the inner sleeve is slidably disposed in the outer sleeve.

Preferably, the connecting portion is connected to the outer sleeve by welding.

Preferably, an upper end plate is connected to one end of the outer sleeve that is slidably connected to the inner sleeve, and an end of the inner sleeve that is connected to the outer sleeve extends from the outer sleeve and is connected to a lower end plate.

Preferably, the upper end plate and the lower end plate have the same structure, and the upper end plate and the lower end plate are symmetrically arranged.

Preferably, both the upper end plate and the lower end plate respectively comprise a connected connecting plate and a vertical plate, the connecting plate is connected with the inner sleeve and the outer sleeve, and the vertical plate is arranged on the connecting plate On the side away from the inner sleeve and the outer sleeve, the connecting plate is arranged perpendicular to the axes of the inner sleeve and the outer sleeve, and the vertical plate is arranged perpendicular to the connecting plate.

Preferably, the vertical plate is I-shaped.

Preferably, the distance between the end of the inner sleeve and the upper end plate is equal to the distance between the outer sleeve and the lower end plate.

Preferably, the outer sleeve and the inner sleeve are arranged coaxially; the outer sleeve has a connected deformation area and a connection area, the connection area is arranged at both ends of the deformation area, and the through hole is located at the the deformation zone.

Compared with the prior art, the utility model achieves the following technical effects: the anti-buckling support with negative Poisson's ratio effect of the present utility model comprises an outer casing and an inner casing, wherein the outer casing has multiple rows of through holes, and the multiple rows of through holes The holes are arranged parallel to the axis of the outer sleeve, the plurality of rows of through holes are evenly distributed around the axis of the outer sleeve, and the adjacent rows of through holes are staggered; each row of through holes includes a plurality of concave hexagonal holes, and the concave hexagonal holes include Two connected isosceles trapezoid holes, the upper bottoms of the two isosceles trapezoid holes are connected to form a concave hexagonal hole, the height of the isosceles trapezoid hole is parallel to the axis of the outer casing, and the upper bottom of the isosceles trapezoid hole is parallel to the axis of the outer casing. The lower bottoms of the adjacent rows of isosceles trapezoid holes are flush with each other; the outer sleeve is sleeved on the outside of the inner sleeve with a gap therebetween.

In the anti-buckling support with negative Poisson's ratio effect of the utility model, the outer casing has a plurality of concave hexagonal holes, so that it has a negative Poisson's ratio effect. Characteristics: When the two ends of the anti-buckling support are under tension, the outer sleeve expands, that is, the diameter becomes larger; when the two ends of the anti-buckling support are under pressure, the outer sleeve shrinks, that is, the diameter becomes smaller, wrapping the inner sleeve, the inner sleeve can be The deformation of the outer casing is restrained, and the outer casing undergoes plastic deformation energy consumption during the tension or compression process of the anti-buckling support, so as to realize the anti-buckling energy consumption. And the anti-buckling support with negative Poisson's ratio effect of the present invention is only provided with an inner casing and an outer casing. The deformation of the outer casing is directly observed, so as to evaluate the energy consumption and the external load, which improves the reliability of the buckling-resistant support structure.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural schematic diagram of the anti-buckling bracing with negative Poisson's ratio effect of the present invention;

Fig. 2 is the structural schematic diagram of the outer casing of the anti-buckling support with negative Poisson's ratio effect of the present invention;

Fig. 3 is the enlarged schematic diagram of the partial structure in Fig. 2;

4 is a schematic structural diagram of the inner casing of the anti-buckling support with negative Poisson’s ratio effect of the present invention;

5 is a schematic structural diagram of the upper end plate or the lower end plate of the anti-buckling brace with negative Poisson’s ratio effect of the present invention;

1 is the outer casing, 101 is the through hole, 102 is the concave hexagonal hole, 103 is the isosceles trapezoid hole, 104 is the deformation area, 105 is the connection area, 2 is the inner casing, 201 is the main body, 202 3 is the upper end plate, 4 is the lower end plate, 5 is the connecting plate, and 6 is the vertical plate.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The purpose of the utility model is to provide an anti-buckling support with negative Poisson's ratio effect, so as to solve the problems existing in the prior art, prolong the service life of the anti-buckling support structure, and improve the reliability of the anti-buckling support structure.

In order to make the above objects, features and advantages of the present utility model more clearly understood, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1-5, wherein, FIG. 1 is a schematic diagram of the structure of the anti-buckling bracing with negative Poisson’s ratio effect of the present invention, and FIG. 2 is the outer casing of the anti-buckling bracing with negative Poisson’s ratio effect of the present invention. Figure 3 is an enlarged schematic view of a part of the structure in Figure 2, Figure 4 is a schematic structural diagram of the inner casing of the anti-buckling support with negative Poisson's ratio effect of the present invention, and Figure 5 is a negative Poisson's ratio effect of the present invention. Schematic diagram of the structure of the upper or lower end plate of the anti-buckling bracing for Poisson's ratio effect.

The present invention provides an anti-buckling support with negative Poisson's ratio effect, comprising an outer casing 1 and an inner casing 2 , wherein the outer casing 1 has multiple rows of through holes 101 , and the multiple rows of through holes 101 are parallel to the outer casing 1 . The axis is arranged, the plurality of rows of through holes 101 are evenly distributed around the axis of the outer sleeve 1, and the adjacent rows of through holes 101 are arranged in a staggered manner; each row of through holes 101 includes a plurality of concave hexagonal holes 102, Two connected isosceles trapezoid holes 103, the upper bottoms of the two isosceles trapezoid holes 103 are connected to form a concave hexagonal hole 102, the height of the isosceles trapezoid hole 103 is parallel to the axis of the outer casing 1, and the isosceles trapezoid hole is The upper bottom of 103 is flush with the lower bottom of the adjacent row of isosceles trapezoidal holes 103 ; the outer sleeve 1 is sleeved on the outside of the inner sleeve 2 with a gap therebetween.

In the anti-buckling support with negative Poisson's ratio effect of the present invention, the outer casing 1 has a plurality of concave hexagonal holes 102, so that it has a negative Poisson's ratio effect. Auxiliary properties; when the two ends of the anti-buckling support are subjected to tensile force, the outer casing 1 expands, that is, the diameter becomes larger; when the two ends of the anti-buckling support are under pressure, the outer casing 1 shrinks, that is, the diameter becomes smaller, wrapping the inner casing 2 , the inner casing 2 can restrain the deformation of the outer casing 1, and the outer casing 1 consumes energy during plastic deformation during the tensile or compressive process of the anti-buckling support, so as to achieve anti-buckling energy consumption. And the anti-buckling support with negative Poisson's ratio effect of the present invention is only provided with the inner casing 2 and the outer casing 1. Compared with the anti-buckling structure in which the inner and outer pipes are simultaneously arranged in the prior art, the structure is lightened, And the deformation of the outer casing 1 can be directly observed, so as to evaluate the energy consumption and the external load, and improve the reliability of the anti-buckling support structure.

The inner sleeve 2 includes a main body portion 201 and a connecting portion 202 disposed at both ends of the main body portion 201 . The diameter of the connecting portion 202 is larger than that of the main body portion 201 . The inner sleeve 2 is set to a variable diameter structure, which is convenient to use the connecting portion 202 to connect with the outer sleeve 1, and at the same time ensures that there is a gap between the main body portion 201 and the outer sleeve 1, so as to avoid affecting the deformation and shrinkage of the outer sleeve 1, and the inner sleeve 2 It can limit the inward tightening of the outer sleeve 1 during the compression process, prevent buckling, and maintain the overall stability of the structure. In this specific embodiment, the gap between the main body portion 201 and the outer sleeve 1 is 3 mm, a certain deformation space is reserved for the shrinkage of the outer sleeve 1 when it is compressed, and the gap between the connecting portion 202 and the outer sleeve 1 is 0.5 mm .

Specifically, the connecting portion 202 at one end of the inner sleeve 2 is connected to the outer sleeve 1, and the connecting portion 202 at the other end of the inner sleeve 2 can be slidably arranged in the outer sleeve 1. When the outer sleeve 1 is deformed, the inner sleeve 2 and the outer casing 1 slide relative to each other, reducing the friction between the inner casing 2 and the outer casing 1 .

In this specific embodiment, the connecting portion 202 at one end of the inner sleeve 2 is connected to the outer sleeve 1 by welding, the welding operation is convenient, and the connection is firm.

More specifically, one end of the outer sleeve 1 and the inner sleeve 2 are slidably connected to an upper end plate 3, and one end of the inner sleeve 2 that is connected to the outer sleeve 1 extends from the outer sleeve 1 and is connected with a lower end plate 4, and the upper end plate is provided. 3 and the lower end plate 4 for easy connection, the upper end plate 3 and the lower end plate 4 can be made of steel plates or bolted, riveted and other forms respectively. The upper end plate 3 is connected with the outer sleeve 1 , and the lower end plate 4 is connected with the inner sleeve 2 .

In other specific embodiments of the present invention, the upper end plate 3 and the lower end plate 4 have the same structure, which reduces the difficulty of production and assembly, and the upper end plate 3 and the lower end plate 4 are symmetrically arranged, and the axis of symmetry is the outer sleeve 1 close to the upper end plate 3 The centerline between the radial end face of the inner sleeve 2 and the radial end face of the inner sleeve 2 close to the lower end plate 4 .

In addition, both the upper end plate 3 and the lower end plate 4 respectively include a connected connecting plate 5 and a vertical plate 6, the connecting plate 5 is connected with the inner sleeve 2 and the outer sleeve 1, and the vertical plate 6 is arranged on the connecting plate 5 away from the inner sleeve 2 and the outer sleeve 1. On one side of the outer casing 1, the connecting plate 5 is arranged perpendicular to the axis of the inner casing 2 and the outer casing 1, the vertical plate 6 is arranged perpendicular to the connecting plate 5, and the upper end plate 3 and the lower end plate 4 include the connecting plate 5 and the vertical plate 6. , the connecting plate 5 provides convenience for connecting the upper end plate 3 and the lower end plate 4 with the inner casing 2 and the outer casing 1, and can be welded to improve the connection firmness. The vertical plate 6 is provided to facilitate the installation and connection of the anti-buckling support structure.

In this specific embodiment, the vertical plate 6 is I-shaped, which improves the uniformity of the force on the connecting plate 5 .

Further, the distance between the end of the inner sleeve 2 and the upper end plate 3 is equal to the distance between the outer sleeve 1 and the lower end plate 4. In this specific embodiment, the end of the inner sleeve 2 and the upper end plate 3 are equal. The distance between them and the distance between the outer sleeve 1 and the lower end plate 4 are both 20 mm. In practical applications, the distance can also be specifically set according to the specifications of the inner sleeve 2 and the outer sleeve 1 .

Furthermore, the outer casing 1 and the inner casing 2 are coaxially arranged to ensure the uniformity of deformation restraint of the inner casing 2 to the outer casing 1 and improve the overall stability and reliability of the structure. It should also be emphasized that the outer sleeve 1 has connected deformation regions 104 and connection regions 105, the connection regions 105 are arranged at both ends of the deformation regions 104, the through holes 101 are located in the deformation regions 104, and the deformation regions 104 of the outer sleeve 1 are located in the middle, Concentrating the deformation energy dissipation part in the middle of the outer casing 1 is equivalent to strengthening the end transition section, effectively preventing the damage of the end connecting part 202 or the transition section, and prolonging the service life of the anti-buckling support structure.

The anti-buckling support with negative Poisson's ratio effect of the present invention includes an inner casing 2, an outer casing 1, an upper end plate 3 and a lower end plate 4. One end of the outer casing 1 is connected to the inner casing 2, and the outer casing 1 is connected to the outer casing 1. One end of the inner sleeve 2 is connected to the lower end plate 4, and one end of the outer sleeve 1, which is slidingly connected to the inner sleeve 2, is connected to the upper end plate 3. The outer sleeve 1 has a negative Poisson's ratio effect. When it becomes larger, the diameter of the radial section becomes smaller when it is compressed, and it wraps the inner sleeve 2 to ensure the overall stability of the support, and the concave hexagonal hole 102 does not have local buckling, so as to achieve anti-buckling energy consumption, the utility model The middle inner casing 2 and the outer casing 1 adopt a circular tube structure, there is no strong or weak axis in the cross section, and the bending moment of inertia in both directions is the same, which improves the structural symmetry. The present invention solves the problem that the existing anti-buckling support structure requires both internal and external restraining members. Only the inner restraining member is required to control the buckling behavior of the support under compression, and since the deformation zone 104 is located in the middle of the outer casing 1, the support can be guaranteed. The end will not be damaged and improve the support reliability.

In addition, it should also be noted that, in addition to the structure of the inner and outer restraint tubes constraining the buckling of the middle tube, the prior art also includes two other types of anti-buckling support structures for circular tubes: 1. The inner tube dissipates energy, and the outer tube restricts buckling deformation; 2. , The inner tube supports, the outer tube consumes energy. However, these two structures only limit the deformation of one side, which is prone to the problem of buckling failure on the unrestricted side of the energy-dissipating pipe fittings. In the anti-buckling support with negative Poisson's ratio effect of the present invention, the outer casing 1 adopts the opening form with negative Poisson's ratio, which solves the above problems. Buckling behavior, the radial section becomes smaller when under compression, and the gap between the outer sleeve 1 and the inner sleeve 2 becomes smaller, and when the deformation is large, the outer sleeve 1 and the inner sleeve 2 are closely fitted, and the outer sleeve 1 and the inner sleeve 2 are tightly fitted. There is a hoop tensile force in the radial section direction, and buckling will not occur, which improves the reliability of the anti-buckling support. In addition, the deformation zone 104 of the outer sleeve 1 is located in the middle, and the deformation occurs in the deformation zone 104, which enhances the energy consumption effect and prevents the end from being damaged.

Specific examples are used in the present invention to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; at the same time, for those skilled in the art , according to the idea of the present utility model, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation on the present invention.

Claims (10)

1. An anti-buckling support with a negative poisson's ratio effect, comprising:

the outer sleeve is provided with a plurality of rows of through holes, the through holes are arranged in parallel to the axis of the outer sleeve, the through holes are uniformly distributed in the circumferential direction around the axis of the outer sleeve, and the through holes in adjacent rows are arranged in a staggered manner; each row of through holes comprises a plurality of concave hexagonal holes, each concave hexagonal hole comprises two communicated isosceles trapezoid holes, the upper bottoms of the two isosceles trapezoid holes are connected to form the concave hexagonal hole, the height of each isosceles trapezoid hole is parallel to the axis of the outer sleeve, and the upper bottoms of the isosceles trapezoid holes are flush with the lower bottoms of the adjacent rows of isosceles trapezoid holes;

the outer sleeve is sleeved outside the inner sleeve, and a gap is formed between the outer sleeve and the inner sleeve.

2. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 1, wherein: the inner sleeve comprises a main body part and connecting parts arranged at two ends of the main body part, and the diameter of each connecting part is larger than that of the main body part.

3. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 2, wherein: the connecting part of one end of the inner sleeve is connected with the outer sleeve, and the connecting part of the other end of the inner sleeve is slidably arranged in the outer sleeve.

4. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 3, wherein: the connecting part is connected with the outer sleeve in a welding mode.

5. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 3, wherein: the end, connected with the inner sleeve in a sliding manner, of the outer sleeve is connected with an upper end plate, and the end, connected with the outer sleeve, of the inner sleeve extends out of the outer sleeve and is connected with a lower end plate.

6. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 5, wherein: the upper end plate is the same as the lower end plate in structure, and the upper end plate and the lower end plate are symmetrically arranged.

7. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 5, wherein: the upper end plate and the lower end plate are respectively and evenly provided with a connecting plate and a vertical plate which are connected, the connecting plate is connected with the inner sleeve and the outer sleeve, the vertical plate is arranged on one side, away from the inner sleeve and the outer sleeve, of the connecting plate, the connecting plate is perpendicular to the axis of the inner sleeve and the axis of the outer sleeve, and the vertical plate is perpendicular to the connecting plate.

8. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 7, wherein: the vertical plate is I-shaped.

9. The buckling-restrained brace having a negative poisson's ratio effect as claimed in claim 5, wherein: the distance between the end part of the inner sleeve and the upper end plate is equal to the distance between the outer sleeve and the lower end plate.

10. The buckling-restrained brace having a negative poisson's ratio effect as claimed in any one of claims 1-9, wherein: the outer sleeve and the inner sleeve are coaxially arranged; the outer sleeve is provided with a deformation area and a connecting area which are connected, the connecting area is arranged at two ends of the deformation area, and the through hole is positioned in the deformation area.

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