CN113529997A

CN113529997A - Multistage energy consumption connecting piece

Info

Publication number: CN113529997A
Application number: CN202110828987.6A
Authority: CN
Inventors: 杨洋; 夏留佳
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-10-22
Anticipated expiration: 2041-07-21
Also published as: CN113529997B

Abstract

The invention discloses a multistage energy consumption connecting piece, which is characterized in that trusses are arranged on the upper plate surface and the lower plate surface of a buckling core plate, so that the slenderness ratio of the buckling core plate is reduced, the buckling core plate is ensured not to be unstable, and the buckling energy consumption of the buckling core plate is guaranteed; the sleeve arranged outside the truss generates certain constraint on the deformation of the truss in the radial direction of the sleeve, so that the truss can realize buckling energy consumption; when the earthquake is excessive, all energy is dissipated by buckling the core plates and the trusses together. The first connecting end and the second connecting end are fixed with an external wall body or a beam, when the external wall body or the beam is stressed axially, the second connecting end extrudes or stretches the second connecting rod to enable the second connecting rod to rotate, and meanwhile, the first connecting end and the first connecting rod can rotate relative to each other, so that the middle part of the connecting piece can rotate integrally to generate rotation friction and consume energy, and under the action of a small earthquake, the purpose of consuming energy is achieved through the rotation friction.

Description

Multistage energy consumption connecting piece

Technical Field

The invention relates to a building energy dissipation structure, in particular to a multistage energy dissipation connecting piece.

Background

Buckling restrained braces are most widely used in many building structure cushioning products. The buckling restrained brace consists of a core unit, a restraining unit and a sliding mechanism unit. The effect of the constraint unit can effectively ensure that the core unit cannot be wholly or partially buckled when being pressed, so that the core unit can be buckled without instability when being pressed and pulled. The core unit is generally made of steel with a low yield point, and large plastic deformation is allowed under the action of axial force, so that the hysteretic curve of the buckling restrained brace is full, and the buckling restrained brace has strong energy consumption capability in strong earthquakes.

However, conventional and improved buckling restrained braces also have disadvantages, such as the relatively small seismic action being insufficient to cause plastic yielding of the core panel for energy dissipation purposes. Conventional buckling restrained braces are not sufficient to dissipate all of the energy when the seismic event is excessive.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides a multi-stage energy-consumption connecting piece to adapt to vibration of each stage.

The technical scheme is as follows: the invention relates to a multistage energy consumption connecting piece, which comprises:

the two ends of the buckling core plate are respectively connected with a first connecting rod and a second connecting rod;

trusses arranged on upper and lower plate surfaces of the buckling core plate along a length direction;

the sleeve is sleeved outside the buckling core plate and the truss;

a first connection end in rotatable connection with the first link relative to each other about an axis;

the second connecting end is movably sleeved outside the second connecting rod and comprises an anti-falling limiting part for preventing the second connecting rod from being separated and a connecting part connected with the anti-falling limiting part; the connecting portion and the second link each have cooperating helical urging portions which, upon application of an axial force, interact against each other to cause rotational movement of the second link and the connecting portion relative to each other about the axis.

The energy consumption mechanism of the multistage energy consumption connecting piece is as follows: the trusses are arranged on the upper plate surface and the lower plate surface of the buckling core plate, so that the slenderness ratio of the buckling core plate is reduced, the buckling core plate is guaranteed not to be unstable, and buckling energy consumption of the buckling core plate is guaranteed; the sleeve arranged outside the truss generates certain constraint on the deformation of the truss in the radial direction of the sleeve, so that the truss can realize buckling energy consumption; the first connecting end and the second connecting end are fixed with an external wall or a beam, when the external wall or the beam is stressed axially, the second connecting end extrudes or stretches the second connecting rod to enable the second connecting rod to rotate, and meanwhile, the first connecting end and the first connecting rod can rotate relative to each other, so that the middle part of the connecting piece can rotate integrally to generate rotation friction energy consumption.

Specifically, the first connecting rod comprises a rod body and a ball head, a spherical cavity is arranged in the first connecting end in a hollow mode, the rod body is inserted into the first connecting end, and the ball head is contained in the spherical cavity. This structure can ensure first connecting rod and first link relative rotation, and when rotating, bulb and spherical chamber looks mutual friction produce the friction power consumption.

Wherein, the inner wall of spherical chamber is provided with ceramic wearing layer. Fully engaged with the ball head, and the friction energy dissipation effect is improved.

The anti-falling limiting part comprises a loop flange and a limiting nut, the loop flange is connected with the connecting part, the second connecting rod penetrates into the connecting part from the loop flange, the second connecting rod is provided with a thread matched with the limiting nut, and the second connecting rod is limited by the limiting nut so as to be prevented from falling off from the loop flange. This configuration makes the second connecting rod have certain relative activity space under the circumstances that does not deviate from the second link to when receiving axial force, two spiral pushing parts can realize leaning on each other, interact.

Wherein, the truss includes two web members, two web members are in buckling extension, symmetrical concatenation formation on the whole length of bucking core plate the truss.

The truss further comprises a chord member, and the chord member is connected with the bending point of the web member along the length direction.

The upper part and the lower part of the inner wall of the sleeve are provided with grooves extending in the length direction, the truss positioned on the upper plate surface is clamped in the groove on the upper part, and the truss positioned on the lower plate surface is clamped in the groove on the lower part.

When the multistage energy-consumption connecting piece is obliquely arranged, the limiting angle steel supports the lower end of the sleeve to avoid the sleeve from sliding off.

Wherein the sleeve is a steel sleeve extending the entire length of the truss.

Has the advantages that: compared with the prior art, the multi-stage energy consumption connecting piece realizes triple energy consumption of rotational friction energy consumption, core plate buckling energy consumption and truss buckling energy consumption through a specific structure, and can meet the three-level fortification requirement of a building structure. Under the action of a small earthquake, the purpose of energy consumption is achieved through rotational friction, when the earthquake action is overlarge, the length-to-thickness ratio of the buckling core plate is reduced through the truss, the buckling core plate is guaranteed not to be unstable, and all energy is dissipated through the combined action of the buckling core plate and the truss.

Drawings

FIG. 1 is a schematic structural view of a multi-stage energy dissipating connector;

FIG. 2 is a partial schematic view of the multi-stage energy dissipating connector;

FIG. 3 is a schematic top view of the upper deck truss of the buckling core plate of FIG. 2;

FIG. 4 is a schematic view of the structure of section A-A in FIG. 1;

FIG. 5 is a cross-sectional view of the first connecting end of FIG. 4 taken along line O-O;

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 7 is a schematic view of the structure of section C-C in FIG. 1;

FIG. 8 is a schematic view of section D-D of FIG. 1;

FIG. 9 is a schematic view of section E-E of FIG. 1;

FIG. 10 is a schematic cross-sectional view taken along line E-E of FIG. 1;

FIG. 11 is a schematic view of the second link;

FIG. 12 is a schematic view of the structure of the connecting portion;

FIG. 13 is a schematic structural view of a lap joint flange;

FIG. 14 is a schematic view of a partial structure of a multi-stage energy dissipating connector;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the multi-stage energy-consuming connector includes a buckling core plate 1, a first connecting rod 2, a second connecting rod 3, a truss 4, a sleeve 5, a first connecting end 6, and a second connecting end 7.

With reference to fig. 2 and 3, the buckling core plate 1 is made of high energy-absorbing alloy, and the upper and lower plate surfaces are welded with trusses 4. The truss 4 is formed by bending two steel bars to form web members 41 with the length equal to that of the buckling core plate 1, and then the two web members 41 are symmetrically spliced and welded along the length direction of the buckling core plate 1 to form the truss 4 with a relatively simple structure. Of course, according to the actual engineering requirement, it is also possible to weld the chord members in the truss 4, and to increase the rigidity of the truss 4 through the bending points of the chord members along the connecting web members 41.

The sleeve 5 is a steel sleeve, and has a length substantially equal to the lengths of the buckling core plate 1 and the truss 4. Referring to fig. 7 to 10, the upper and lower portions of the inner wall of the sleeve 5 are both provided with grooves 51 along the length direction, and the trusses 4 welded to the upper and lower plate surfaces are respectively clamped in the corresponding grooves 51. Therefore, when the truss 4 deforms in the length direction, the truss 4 cannot dislocate along the circumferential direction of the sleeve, the truss 4 can be guaranteed to be successfully pressed and buckled, and the truss, the buckling core plate 1 and the sleeve 5 form a whole.

Referring to fig. 1 again, the left and right ends of the buckling core plate 1 are respectively connected with a first connecting rod 2 and a second connecting rod 3. Wherein, the first connecting rod 2 is a rod body and ball head connecting structure. As shown in fig. 4-6, a spherical cavity 61 is hollowed in the first connection end 6, a ceramic wear-resistant layer 62 is disposed on an inner wall of the spherical cavity 61, and the size of the ball head matches the size of the spherical cavity 61. After assembly, the shaft of the first connecting rod 2 is inserted into the first connecting end 6, the ball being engaged in the spherical cavity 61. This construction allows the first link 2 and the first connection end 6 to be rotated relative to each other about an axis, achieving frictional dissipation of energy upon rotation.

As shown in fig. 11, the second connecting rod 3 is provided with an external thread in the middle and a screw pushing part 9 at the end.

Accordingly, the second connection end 7 includes the escape prevention restricting portion and the connection portion 8. The anti-dropping limiting part comprises a loop flange 10 and a limiting nut 11, the structure of the loop flange 10 can be roughly seen in fig. 1 and 13, the loop flange 10 is sleeved on the second connecting rod 3, and the second connecting rod 3 is prevented from dropping off from the loop flange 10 through limiting of the limiting nut 11.

As shown in fig. 12, the end face of the connecting portion 8 is provided with bolt holes corresponding to the loop flange 10, and the connecting portion 8 is connected to the loop flange 10 by bolts. The connecting part 8 is provided with a hole for the second connecting rod 3 to penetrate through along the axis, and the inner wall of the hole is provided with a spiral pushing part 9 matched with the second connecting rod 3. When the axial atress, second connecting end 7 extrusion or stretch-draw second connecting rod 3, the spiral promotion portion 9 between them supports each other and leans on this moment, makes the second connecting rod 3 rotatory and then drives the middle part and the first connecting rod 2 rotation of power consumption connecting piece, produces the friction power consumption effect.

As shown in fig. 14, the first connection end 6 and the second connection end 7 are connected to a wall or a beam by means of bolts, pins, etc., and the use angle of the energy consumption connection member is adjusted according to the actual engineering situation. When the inclined arrangement is adopted, a limiting angle steel 12 is further arranged for supporting the sleeve 5 to avoid the sleeve from sliding off. The specific limiting angle steel 12 is arranged on the first connecting rod 2 or the second connecting rod 3 which is lower in position, and supports the sleeve 5.

Claims

1. A multi-stage dissipative connector, comprising:

the buckling core plate (1) is provided with a first connecting rod (2) and a second connecting rod (3) at two ends respectively;

a truss (4) arranged on upper and lower plate surfaces of the buckling core plate (1) along a length direction;

the sleeve (5) is sleeved outside the buckling core plate (1) and the truss (4);

a first connection end (6) connected to the first connecting rod (2) in a rotatable manner relative to one another about an axis;

the second connecting end (7) is movably sleeved outside the second connecting rod (3) and comprises an anti-falling limiting part for preventing the second connecting rod (3) from being separated and a connecting part (8) connected with the anti-falling limiting part; the connecting part (8) and the second connecting rod (3) each have cooperating helical pushing parts (9), the respective helical pushing parts (9) acting against each other when an axial force acts such that the second connecting rod (3) and the connecting part (8) move rotationally relative to each other about an axis.

2. The multi-stage energy consumption connecting piece according to claim 1, wherein the first connecting rod (2) comprises a rod body and a ball head, a spherical cavity (61) is hollowed in the first connecting end (6), the rod body is inserted into the first connecting end (6), and the ball head is accommodated in the spherical cavity (61).

3. The multi-stage energy dissipating connection according to claim 2, characterized in that the inner wall of the spherical cavity (61) is provided with a ceramic wear layer (62).

4. The multi-stage energy consumption connector according to claim 1, wherein the anti-disengagement limiting part comprises a loop flange (10) and a limiting nut (11), the loop flange (10) is connected with the connecting part (8), the second connecting rod (3) penetrates into the connecting part (8) from the loop flange (10), the second connecting rod (3) is provided with a thread matched with the limiting nut (11), and the limiting is carried out through the limiting nut (11) to prevent the second connecting rod (3) from being disengaged from the loop flange (10).

5. The multi-stage energy dissipating connection according to claim 1, wherein the buckling core plate (1) is made of a high energy absorbing alloy.

6. The multi-stage energy consuming connection according to claim 1, wherein the truss (4) comprises two web members (41), the two web members (41) being folded, extended, symmetrically spliced over the entire length of the buckling core plate (1) to form the truss (4).

7. The multi-stage energy consuming connection according to claim 6, wherein the truss (4) further comprises chords connecting bending points of the web members (41) lengthwise.

8. The multi-stage dissipative connector according to claim 1, wherein the sleeve (5) has grooves (51) extending in the length direction on the upper and lower inner walls, the truss (4) on the upper deck being caught in the upper groove (51) and the truss (4) on the lower deck being caught in the lower groove (51).

9. The multi-stage dissipative connector according to claim 1 or 8, further comprising a limiting angle steel (12), wherein when the multi-stage dissipative connector is obliquely arranged, the limiting angle steel (12) is supported at the lower end of the sleeve (5) to prevent the sleeve from sliding off.

10. The multi-stage dissipative connector according to claim 1 or 6, wherein the sleeve (5) is a steel sleeve extending over the entire length of the truss (4).