CN111827761A - Self-resetting support provided with stepless friction energy consumption adjusting device - Google Patents
Self-resetting support provided with stepless friction energy consumption adjusting device Download PDFInfo
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- CN111827761A CN111827761A CN202010571602.8A CN202010571602A CN111827761A CN 111827761 A CN111827761 A CN 111827761A CN 202010571602 A CN202010571602 A CN 202010571602A CN 111827761 A CN111827761 A CN 111827761A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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Abstract
The invention relates to a self-resetting support provided with a stepless friction energy consumption adjusting device, which comprises: connecting a force transmission mechanism: the connecting plates at two ends are positioned at two opposite ends and respectively fixedly connected with the ends of the inner sleeve and the outer sleeve, and the two end plates are respectively positioned at two axial sides of the outer sleeve and the inner sleeve; a self-resetting mechanism; friction energy consumption mechanism: the two outer friction plates clamp the two inner friction plates through the pre-tightening bolts. Compared with the prior art, the invention can solve the conflict between the support energy consumption capability and the self-resetting capability, reduce the obstruction to the support resetting while providing the reliable energy consumption capability, and realize the flexibility of adjusting the support loading and unloading rigidity and the yield bearing capacity.
Description
Technical Field
The invention belongs to the technical field of anti-side support, and relates to a self-resetting support provided with a stepless friction energy consumption adjusting device.
Background
The support is widely applied to the field of civil engineering as a building structure side-resisting component, but the traditional support loses the function due to excessive residual deformation and buckling of a core component after a strong earthquake. For this reason, BRB struts capable of preventing buckling of struts and self-restoring struts providing a certain self-restoring ability to reduce residual deformation have emerged.
Because the BRB support still has larger residual deformation after strong earthquake, in order to reduce the damage and deformation of the structure after the earthquake, a latest technology is a self-resetting support which promotes the resetting of the whole structure by utilizing the restoring force provided by a pre-tightening core component (a guy cable, a bar material and the like) based on super-elastic prestress; meanwhile, due to insufficient energy consumption of the self-resetting support, the earthquake response of the structure can be amplified, and energy consumption capacity needs to be provided through additional friction devices or metal yielding and the like so as to dissipate energy input by an earthquake. The friction energy consumption form is widely applied to the field of civil engineering as a stable and convenient energy consumption form. However, since the friction provided by conventional friction dissipative forms always tends to resist movement, excessive friction can hinder the self-resetting capability of the brace when the brace is unloaded. Meanwhile, the existing self-resetting support has coupled loading and unloading rigidity and bearing capacity and cannot be independently adjusted. The above problems limit further popularization and application of the self-resetting support.
Disclosure of Invention
The invention aims to provide a self-resetting support provided with a stepless friction energy consumption adjusting device, which can solve the conflict between the support energy consumption capability and the self-resetting capability, reduce the obstruction to support resetting while providing reliable energy consumption capability, and realize the flexibility of adjusting the loading and unloading rigidity and yield bearing capacity of the support. Specifically, the friction force can be increased along with the loading of the support to improve the energy consumption capacity, and can be reduced along with the unloading of the support to provide the stepless regulation of the self-resetting capacity, and finally, the energy consumption capacity of the friction device is ensured under the condition that the return barrier force of the novel support is reduced, and meanwhile, the bearing capacity and the flexibility of rigidity regulation are improved.
The purpose of the invention can be realized by the following technical scheme:
a self-resetting brace configured with infinitely adjustable friction dissipating devices, comprising:
connecting a force transmission mechanism: the connecting plates at the two ends are positioned at the two opposite ends and are respectively and fixedly connected with the ends of the inner sleeve and the outer sleeve, and the two end plates are respectively positioned at the two axial sides of the outer sleeve and the inner sleeve;
the self-resetting mechanism comprises: comprises a self-resetting inhaul cable component which is in a tensioning state and is respectively and fixedly connected with two end plates;
friction energy consumption mechanism: the two friction plates are axially arranged in the same straight line, and the two outer friction plates are connected through the pre-tightening bolt and clamp the two side surfaces of the two inner friction plates.
Furthermore, the friction contact interface between the outer friction plate and the inner friction plate is provided with an inclined surface part or a curved surface part, so that the distance between the two outer friction plates is changed when the outer friction plate and the inner friction plate are displaced relatively.
Furthermore, the friction contact interface comprises a plane section along the relative displacement direction of the outer friction plate and the inner friction plate and a convex section which is arranged between the plane sections and is convex along the direction vertical to the plane section, and the convex section is in an inclined plane or a curved surface shape and is in smooth transition with the plane section.
Still more preferably, the protruding section is provided with one or more sections.
Furthermore, the inner friction plate is provided with a through axial sliding groove, the outer friction plate is provided with a through connecting round hole, and the inner friction plate and the outer friction plate are in friction contact in a pressed state through the pre-tightening bolt which penetrates through the axial sliding groove and can slide along the axial sliding groove.
Further, the pretension bolt has elastic deformation capability perpendicular to the friction contact interface of the inner friction plate and the outer friction plate.
Furthermore, the end plate and the end connecting plate are in axial sliding fit, so that the end plate and the end connecting plate can only slide relatively in the axial direction.
Furthermore, a round hole or an oblong hole connected with the external structure node area is further processed on the end connecting plate, and the end connecting plate is connected to the external structure point area through a bolt structure matched with the round hole or the oblong hole.
Furthermore, the self-resetting inhaul cable assembly comprises a prestressed inhaul cable, wherein two ends of the prestressed inhaul cable are fixedly connected with two end plates respectively.
Furthermore, the prestressed stay cable is fastened on the two end plates through anchor bolts.
Compared with the prior art, the invention has the following advantages:
(1) the friction device provided by the invention can form a novel stepless regulation friction energy dissipation device by structural design, namely, the friction force can be increased when the support is loaded in the positive direction so as to improve the energy dissipation capability and reduce the structural response; when the unloading is carried out reversely, the self-resetting capability of the support is ensured by reducing; meanwhile, the increase and the decrease of the friction force can be performed according to the size of the wedge angle; the energy consumption mechanism is clear, and the energy consumption capability is stable.
(2) According to the invention, through the combination of the self-resetting component of the prestressed inhaul cable and the stepless adjusting friction energy consumption device, the conflict between the supporting energy consumption capability and the self-resetting capability can be solved, and the flexibility of adjusting the supporting loading and unloading rigidity and the yield bearing capacity is realized.
(3) The self-resetting capability of reliable support is realized by applying prestress tension to the prestress stay cable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is an exploded schematic view of the location of the friction dissipating mechanism;
FIG. 4 is a schematic view of an outer sleeve;
FIG. 5 is a schematic view of the inner sleeve;
FIG. 6 is a schematic view of a self-resetting cable assembly;
FIG. 7 is a schematic view of a novel self-resetting support with infinitely adjustable friction energy dissipation devices in a no-external-load state;
FIG. 8 is a schematic front view of a novel self-resetting support equipped with infinitely adjustable friction dissipating devices in a tensioned operating phase;
FIG. 9 is a schematic front view of a novel self-resetting support with infinitely adjustable friction dissipating devices in a stressed phase;
FIG. 10 is a schematic view of an inner friction plate;
FIG. 11 is a schematic cross-sectional view B-B of FIG. 10;
the notation in the figure is:
100-self-reset mechanism, 101-prestressed guy cable;
200-friction energy dissipation mechanism, 201-first inner friction plate, 202-second inner friction plate, 203-outer friction plate, 204-pretightening bolt, 205-built-in spring, 206-convex section and 207-plane section;
300-connecting force transmission mechanism, 301-outer sleeve, 302-inner sleeve, 303-end connecting plate II, 304-end connecting plate I and 305-end plate.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following examples or embodiments, unless otherwise specified, functional components or structures are all conventional components or structures in the art for achieving the corresponding functions.
The invention provides a self-resetting support provided with a stepless friction energy consumption adjusting device, the structure of which is shown in figures 1 and 2, and the self-resetting support comprises:
connecting the force transmission mechanism 300: the connecting structure comprises an outer sleeve 301, an inner sleeve 302, two end connecting plates (namely an end connecting plate II 303 and an end connecting plate I304) and two end plates 305, wherein the inner sleeve 302 is arranged in the outer sleeve 301 and is fixed relative to the outer sleeve 301 in the radial direction, the two end connecting plates are arranged at two opposite ends and are respectively and fixedly connected with the ends of the inner sleeve 302 and the outer sleeve 301, and the two end plates 305 are respectively arranged at two axial sides of the outer sleeve 301 and the inner sleeve 302;
self-reset mechanism 100: comprises a self-reset inhaul cable component which is in a tension state and is respectively and fixedly connected with two end plates 305;
friction energy consumption mechanism 200: the friction device comprises two inner friction plates, two outer friction plates 203 and a pre-tightening bolt 204 which are respectively fixed on an outer sleeve 301 and an inner sleeve 302, wherein the two inner friction plates are arranged in the same straight line along the axial direction, and the two outer friction plates 203 are connected through the pre-tightening bolt 204 and clamp the two side surfaces of the two inner friction plates.
In a specific embodiment of the present invention, please refer to fig. 1 and fig. 10, etc., the friction contact interface between the outer friction plate 203 and the inner friction plate has an inclined surface portion or a curved surface portion, so that when the outer friction plate 203 and the inner friction plate are relatively displaced, the distance between the two outer friction plates 203 is changed, thereby changing the pretightening force applied by the pretightening bolt 204 to the outer friction plate 203 and the inner friction plate, and the corresponding friction force is also changed accordingly.
In a more specific embodiment, referring to fig. 10 and 11 again, the friction contact interface includes a plane section 207 along the relative displacement direction between the outer friction plate 203 and the inner friction plate, and a convex section 206 disposed between the plane section 207 and protruding along the direction perpendicular to the plane section 207, wherein the convex section 206 is in a shape of an inclined plane or a curved surface and smoothly transits to the plane section 207. The inclination angle of the inclined plane or the curved surface can be set according to the requirement.
In a more specific embodiment, the protruding portion 206 is provided with one or more segments.
In a specific embodiment of the present invention, please refer to fig. 3 and the like, a through axial sliding slot is disposed on the inner friction plate, a through connecting circular hole is disposed on the outer friction plate 203, and the inner friction plate and the outer friction plate 203 are in friction contact in a pressed state through the pre-tightening bolt 204 that passes through the axial sliding slot and can slide along the axial sliding slot. The pretension bolt 204 applies positive pressure to the inner friction plate and the outer friction plate, and an inner spring 205 (specifically between the end of the pretension bolt 204 and the side surface of the outer friction plate 203) is sleeved at both ends to enhance the transverse deformability of the friction device. The built-in spring 205 may be a ring spring or a disc spring, and is used to apply a repulsive force to the end of the pretensioning bolt 204 and the outer friction plate 203, so as to increase the friction force between the outer friction plate 203 and the two inner friction plates.
In a specific embodiment of the present invention, the pretensioning bolt 204 has a certain elastic deformability along a direction perpendicular to the frictional contact interface of the inner friction plate and the outer friction plate 203.
In one embodiment of the present invention, please refer to fig. 1 and so on, the end plate 305 and the end connection plate are axially slidably engaged, so that the end plate 305 and the end connection plate can only axially slide relatively.
In a specific embodiment of the present invention, please refer to fig. 1 and so on, the end connecting plate is further processed with a round hole or an oblong hole connected with the external structure node area, and the end connecting plate is connected to the external structure node area through a bolt structure matched with the round hole or the oblong hole.
In a specific embodiment of the present invention, please refer to fig. 6 and so on, the self-resetting cable assembly includes a prestressed cable 101 having two ends respectively fixedly connected to two end plates 305. In a more specific embodiment, the prestressed cables 101 are fastened to the two end plates 305 by anchor bolts.
In the above embodiments, any one may be implemented alone, or any two or more may be implemented in combination.
The above embodiments will be described in more detail with reference to specific examples
Example 1:
as shown in fig. 1-7, a novel self-resetting support equipped with a stepless friction energy consumption adjusting device comprises a self-resetting mechanism 100, a friction energy consumption mechanism 200 and a connecting force transmission mechanism 300. In the installation and implementation process, the first inner friction plate 201 is fixedly connected to the surface of the outer sleeve, the second inner friction plate 202 is fixedly connected to the surface of the inner sleeve, and the two inner friction plates are fixed along the same straight line;
Meanwhile, friction plates can be arranged on the adjacent surfaces of the outer friction plate 203 and the first and second inner friction plates 201 and 202, and a pretension bolt 204 is used for applying positive pressure. When the inner sleeve 302 and the outer sleeve 301 slide relatively, the friction energy consumption mechanism 200 consumes energy through mutual friction of the first inner friction plate 201, the second inner friction plate 202 and the outer friction plate 203.
As shown in fig. 10 and 11, the frictional contact interface between the outer friction plate 203 and the first and second inner friction plates 201 and 202 includes a planar section 207 along the relative displacement direction between the outer friction plate 203 and the inner friction plate, and a convex section 206 disposed between the planar sections 207 and protruding in the direction perpendicular to the planar section 207, wherein the convex section 206 is in the form of an inclined plane or a curved surface and smoothly transitions with the planar section 207.
After the above structural features are provided, with reference to fig. 8 to 9, the second end connecting plate 304 is fixed, and the embodiment may be implemented according to the following processes:
as shown in fig. 8, the working mechanism of the novel self-resetting support with the stepless adjusting friction energy consumption device under the action of tensile force is explained. Specifically, the external pulling force of one end is transmitted to inner sleeve 302 through end connecting plate one 303, and is further transmitted to end plate 305 on the same side; the external force at the other end is transmitted to the outer sleeve 301 through the second end connecting plate 304 and is further transmitted to the end plate 305 on the same side. The distance between the two end plates 305 is increased compared to the initial position, thereby extending the horizontal length of the prestressed cable 101, and the prestressed cable 101 is pulled and provides a restoring capability. Under the action of loads or earthquakes exceeding the designed level, when the end connecting plates are provided with the oblong holes, the bolts connecting the two end connecting plates and the node areas can slide along the oblong holes of the end connecting plates (the direction of the oblong holes is the same as the direction of relative movement of the inner sleeve 301 and the outer sleeve 301), so that the phenomenon that the support is stressed excessively or damaged is avoided.
In addition, when the external pulling force is transmitted to the inner sleeve 302 through the first end connecting plate 304, a part of the external pulling force is transmitted to the outer sleeve 301 through the friction energy consumption device with stepless adjustment, and further transmitted to the second end connecting plate 303. The energy consumption is performed by relative sliding among the first inner friction plate 201, the second inner friction plate 202 and the outer friction plate 203. During loading, the distance between the first inner friction plate 201 and the second friction plate welded to the inner sleeve 302 and the outer sleeve 301 respectively will increase from the equilibrium position, and due to the wedge angle (i.e. the inclined surface or curved surface portion of the frictional contact interface), the outer friction plate 203 will move in the axial direction and the direction perpendicular to the frictional contact interface, so that the pretension bolt 204 extends from the equilibrium position to increase the positive pressure, and further the friction force provided by the stepless adjusting friction device is increased, so as to increase the energy consumption capability. When the friction plate is unloaded, the distance between the first inner friction plate 201 and the second inner friction plate 202 is reduced towards the balance position, so that the pre-tightening bolts 204 of the inner friction plate and the outer friction plate 203 are shortened towards the balance position, the positive pressure is reduced, and the friction force of the stepless adjusting friction device is further reduced, so that the self-resetting capability is improved.
As shown in fig. 9, the working mechanism of the novel self-resetting support with the stepless adjusting friction energy consumption device under the action of pressure is explained. Specifically, the outer pressure on one side is transmitted to inner sleeve 302 through end connecting plate one 304, and is further transmitted to an end plate 305 on the opposite side; the external pressure on the other side is also transmitted to the outer sleeve 301 through the end connecting plate two 303 and is further transmitted to the other end plate 305 on the opposite side. The distance between the two end plates 305 is increased compared to the initial position, thereby extending the horizontal length of the prestressed cable 101, and the prestressed cable 101 is pulled and provides a restoring capability. Under the action of loads or earthquakes exceeding the design level, when the end connecting plate is provided with the oblong holes, the bolts connecting the end connecting plate and the node area can slide along the oblong holes of the end connecting plate (the direction of the oblong holes is the same as the direction of relative movement of the inner sleeve 301 and the outer sleeve 301), so that the phenomenon that the support is stressed excessively or damaged is avoided.
In addition, when the external pressure is transmitted to the inner sleeve 302 through the first end connecting plate 304, a part of the external pressure is transmitted to the outer sleeve 301 through the stepless adjusting friction energy consumption device and further transmitted to the second end connecting plate 304. The energy consumption is also performed by the relative sliding among the first inner friction plate 201, the second inner friction plate 202, and the outer friction plate 203. When loaded, the distance between the first and second inner friction plates 201, 202 will decrease from the equilibrium position. Due to the wedge angle, the outer friction plate 203 can also move in the longitudinal direction and the transverse direction (in the axial direction and the direction perpendicular to the friction contact interface), so that the pretension bolt 204 is stretched from the equilibrium position to increase the positive pressure, and the friction force provided by the stepless adjusting friction device is increased to increase the energy consumption capacity. When the friction plate is unloaded, the distance between the first inner friction plate 201 and the second inner friction plate 202 is increased towards the balance position, so that the pre-tightening bolts 204 of the inner friction plate and the outer friction plate 203 are shortened towards the balance position, the positive pressure is reduced, the friction force of the stepless adjusting friction device is further reduced, and the self-resetting capability is improved.
From the above, through the design of the self-resetting energy dissipation support, no matter the self-resetting energy dissipation support is in a tension state or a compression state, the self-resetting assembly is in a tension state; meanwhile, the pretension bolt 204 of the stepless adjusting friction energy consumption device increases the positive pressure during supporting and loading, and decreases the positive pressure during unloading, so as to achieve the design goal that the friction force increases along with the increase of the loading and decreases along with the decrease of the loading. The decoupling design of loading and unloading rigidity and yield bearing capacity can be realized through the combination of the self-resetting assembly and the stepless adjusting friction energy dissipation device. And because the two are stressed symmetrically under the tension and compression state, the behavior of the integral support also presents the characteristic of symmetrical tension and compression.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A self-resetting brace configured with infinitely adjustable friction dissipating devices, comprising:
connecting a force transmission mechanism: the connecting plates at the two ends are positioned at the two opposite ends and are respectively and fixedly connected with the ends of the inner sleeve and the outer sleeve, and the two end plates are respectively positioned at the two axial sides of the outer sleeve and the inner sleeve;
the self-resetting mechanism comprises: comprises a self-resetting inhaul cable component which is in a tensioning state and is respectively and fixedly connected with two end plates;
friction energy consumption mechanism: the two friction plates are axially arranged in the same straight line, and the two outer friction plates are connected through the pre-tightening bolt and clamp the two side surfaces of the two inner friction plates.
2. The self-resetting support with stepless adjustable friction energy dissipation device of claim 1, wherein the friction contact interface of the outer friction plate and the inner friction plate has a slope portion or a curved portion, so that the distance between the two outer friction plates changes when the outer friction plate and the inner friction plate are displaced relatively.
3. The self-resetting support with stepless adjustable friction energy dissipation device of claim 2, wherein said friction contact interface comprises a plane section along the relative displacement direction of the outer friction plate and the inner friction plate, and a convex section disposed between the plane sections and protruding along the direction perpendicular to the plane section, said convex section is in the shape of an inclined plane or a curved plane and smoothly transits with the plane section.
4. The self-resetting support with infinitely adjustable friction energy dissipation device of claim 3, wherein the protruding section is provided with one or more segments.
5. The self-resetting support with the stepless friction energy consumption adjusting device as claimed in claim 1, wherein the inner friction plate is provided with a through axial sliding slot, the outer friction plate is provided with a through connecting circular hole, and the inner friction plate and the outer friction plate are in friction contact in a pressed state through the pre-tightening bolt which passes through the axial sliding slot and can slide along the axial sliding slot.
6. The self-resetting support with infinitely adjustable friction energy dissipation device of claim 1, wherein the pre-tightening bolt has elastic deformability perpendicular to the frictional contact interface of the inner friction plate and the outer friction plate.
7. The self-resetting support with stepless adjustable friction energy dissipation device of claim 1, wherein the end plate and the end connection plate are axially slidably engaged, so that the end plate and the end connection plate can only axially slide relatively.
8. The self-resetting support with the stepless friction and energy consumption adjusting device as claimed in claim 1, wherein the end connecting plate is further processed with a round hole or an oblong hole connected with an external structure node area, and the end connecting plate is connected with the external structure node area through a bolt structure matched with the round hole or the oblong hole.
9. The self-resetting support with the stepless friction and energy consumption adjusting device as claimed in claim 1, wherein the self-resetting bracing cable assembly comprises a prestressed bracing cable with two ends fixedly connected with two end plates respectively.
10. The self-resetting support with stepless adjustable friction energy dissipation device of claim 9, wherein said prestressed cables are fastened to two end plates by anchor bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571602.8A CN111827761A (en) | 2020-06-22 | 2020-06-22 | Self-resetting support provided with stepless friction energy consumption adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571602.8A CN111827761A (en) | 2020-06-22 | 2020-06-22 | Self-resetting support provided with stepless friction energy consumption adjusting device |
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| CN111827761A true CN111827761A (en) | 2020-10-27 |
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| CN202010571602.8A Pending CN111827761A (en) | 2020-06-22 | 2020-06-22 | Self-resetting support provided with stepless friction energy consumption adjusting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026944A (en) * | 2021-03-19 | 2021-06-25 | 东北林业大学 | Self-resetting buckling-restrained brace with variable friction device |
| CN113756466A (en) * | 2021-09-28 | 2021-12-07 | 太原城市职业技术学院 | Self-resetting friction damper |
| CN115075418A (en) * | 2022-07-21 | 2022-09-20 | 西安建筑科技大学 | Self-resetting one-way friction energy dissipation device |
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| CN113026944A (en) * | 2021-03-19 | 2021-06-25 | 东北林业大学 | Self-resetting buckling-restrained brace with variable friction device |
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| CN115075418A (en) * | 2022-07-21 | 2022-09-20 | 西安建筑科技大学 | Self-resetting one-way friction energy dissipation device |
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Application publication date: 20201027 |
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| RJ01 | Rejection of invention patent application after publication |