CN112663812A - Lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support - Google Patents
Lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support Download PDFInfo
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Abstract
The invention provides a lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support which comprises an elastic resetting system and mixed energy dissipation systems, wherein the elastic resetting system is arranged between a left loading control device and a right loading control device, and the mixed energy dissipation systems are symmetrically arranged on the upper side and the lower side of the elastic resetting system; the hybrid energy consumption system comprises a viscoelastic material arranged between the outer constraint steel plate and the inner shearing steel plate, and a lead core and an energy consumption steel bar which penetrate through holes of the outer constraint steel plate and the inner shearing steel plate; the joint of the external restraint steel plate and the internal shearing steel plate is connected through a bolt, and two ends of the energy-consuming steel bar are screwed through nuts with spring gaskets arranged inside; the outer constraint steel plate and the inner shearing steel plate are connected in a herringbone mode, and the outer constraint steel plate and the inner shearing steel plate are hinged to the left loading control device and the right loading control device respectively. The invention has the performance characteristics of a lead viscoelastic damper and a metal damper, the energy consumption capacity of the damper can be improved by adjusting the herringbone included angle, and the support can effectively reduce the residual deformation of the structure.
Description
Technical Field
The invention relates to the technical field of civil building structures, in particular to a speed-type displacement-sensitive and post-yield bearing capacity enhanced self-resetting energy dissipation support structure, and particularly relates to a lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support.
Background
The excessive structure residual displacement caused by earthquake may seriously affect the normal use of the structure, in recent years, a component and a structure system with a self-resetting function are becoming one of research hotspots of the earthquake engineering community, and the component and the structure system not only have stronger energy consumption capability and can effectively reduce the response of the structure in the earthquake, but also have stronger self-resetting capability and can enable the structure to be restored to the original position after the earthquake.
At present, an energy consumption system and a reset system of an existing self-reset device are often connected in a complex mode, the energy consumption capacity of the energy consumption system cannot be fully exerted, the performance characteristics of the energy consumption system are usually too single, and the energy consumption system cannot adapt to external loads in different forms.
Disclosure of Invention
According to the technical problem, the self-resetting energy dissipation support for the bending-pulling deformation conversion of the lead viscoelastic steel bar is provided.
The technical means adopted by the invention are as follows:
a lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support comprises an elastic resetting system and mixed energy dissipation systems, wherein the elastic resetting system is arranged between a left loading control device and a right loading control device, and the mixed energy dissipation systems are respectively positioned on the upper side and the lower side of the elastic resetting system and are symmetrically arranged;
two ends of the reset system are respectively connected with the left loading control device and the right loading control device;
the hybrid energy consumption system comprises an inner shearing steel plate and two outer constraint steel plates, one end of each of the two outer constraint steel plates clamps one end of the inner shearing steel plate in the middle, the other end of each of the inner shearing steel plates is hinged with the right loading control device, and the other end of each of the outer constraint steel plates is hinged with the left loading control device;
the joint of the outer constraint steel plate and the inner shearing steel plate is connected through a tightening bolt, initial pre-pressure can be applied through the bolt, and a plurality of energy-consuming steel bars which simultaneously penetrate through the outer constraint steel plate and the inner shearing steel plate are arranged at the joint;
the inner shearing steel plate and the outer constraint steel plate are connected in a herringbone mode.
Furthermore, the reset system comprises a left constraint end plate and a right constraint end plate which are arranged in a bilateral symmetry mode, and two constraint side plates which are arranged in an up-down symmetry mode, wherein two ends of each constraint side plate are fixedly connected with the left constraint end plate and the right constraint end plate respectively;
a loading shaft is arranged in a space defined by the left constraint end plate, the right constraint end plate and the two constraint side plates, and the right end of the loading shaft penetrates through the right constraint end plate, then penetrates through the middle part of the right loading control device and is hinged with the right loading control device;
the left end and the right part of the loading shaft are provided with limit nuts, two sliding blocks which are sleeved on the loading shaft and are in sliding connection with the loading shaft are arranged between the two limit nuts, a spring is clamped between the two sliding blocks, the inner walls of the two ends of the constraint side plate are respectively provided with constraint bulges extending towards the axial direction of the loading shaft, and the sliding blocks are in contact connection with the constraint bulges; the left side is located stop nut with between the left side restraint end plate, be located the right side stop nut with all be equipped with the displacement chamber between the right side restraint end plate, left side restraint end plate with left side loading controlling means is articulated.
Further, the internal shearing steel plate is in the junction has button head I, the external restraint steel plate is in the junction has button head II, and two the button head II will the button head I presss from both sides in the centre, and pass through the connection of tightening bolt, tightening bolt passes button head I with the center of button head II, and is a plurality of the power consumption rod iron centers on tightening bolt evenly distributed, just the both ends of power consumption rod iron are tightened through the nut that is equipped with the elastic gasket, and the elastic gasket is allowed to take place certain degree compression deformation in the loading process to this guarantees that the power consumption rod iron accomplishes the turn-draw deformation conversion.
Further, the left loading control device and the right loading control device have the same structure and respectively comprise a rectangular part and circular parts positioned at the upper end and the lower end of the rectangular part;
one end, far away from the round head I, of the inner shearing steel plate is semicircular, a through groove is formed in the end, and the circular portion of the right loading control device enters the through groove and is hinged through a hinge shaft;
one end, far away from the round head II, of the outer constraint steel plate is semicircular, and the round part of the left loading control device is clamped by the end of the friction outer plate and hinged through a hinge shaft.
Further, a damping viscoelastic material layer is arranged between the outer constraint steel plate and the inner shearing steel plate at the joint.
Further, a plurality of lead cores are arranged at the connecting position and penetrate through the outer constraint steel plate and the inner shearing steel plate.
Furthermore, rod caps are arranged at two ends of the energy-consuming steel rod, and spring gaskets are arranged between the rod caps and the friction outer plates.
Further, the spring is a combined disc spring or a spiral compression spring or a ring spring.
The left loading control device or the right loading control device has three stages of energy consumption after being loaded:
in the first stage, the lead viscoelastic damper formed by combining the damping viscoelastic material layer and the lead core at a low displacement level consumes energy, provides the due performance characteristics of a speed type damper and the performance characteristics of displacement sensitivity of the lead core at the low displacement level, and ensures that the structure can consume energy at a wind vibration or low displacement level, and at the moment, the energy-consuming steel bar is in a linear elastic state;
in the second stage, along with further increase of deformation, on the basis of energy consumption of the lead viscoelastic damper, because spring gaskets are arranged at two ends of the energy consumption steel bar to allow the energy consumption steel bar to stretch out and draw back within a certain range, the energy consumption steel bar is subjected to bending deformation and is subjected to yield energy consumption;
in the third stage, along with the further increase of deformation, the spring gaskets at the end parts of the energy-consuming steel bars are flattened, at the moment, the bending deformation of the steel bars is converted into stretching deformation, and the energy-consuming capacity and the bearing capacity of the energy-consuming steel bars are further enhanced.
In each stage, the elastic reset system can provide reset force and spring resistance, and initial pre-pressure design can be carried out on the elastic reset system according to the bearing capacity conditions of the mixed energy consumption system in different loading stages.
The device can adjust the thickness of the energy-consuming steel bar and the reserved distance of the spring gasket at the end part according to the design requirement, and ensures that the energy-consuming steel bar generates bending-tensile deformation conversion under the condition of the design displacement to carry out yield energy consumption;
the device can carry out initial pre-pressure design on the reset system according to the bearing capacity of the hybrid energy consumption system at different loading stages, and ensures that the support residual deformation can be completely reset or partially reset;
the energy dissipation system can be adjusted to be completely designed into friction energy dissipation, or designed into a lead viscoelastic damper energy dissipation, or steel bar bending-stretching deformation conversion energy dissipation, and can also be a combination of various energy dissipation mechanisms.
Compared with the prior art, the invention has the following advantages:
1. the invention has convenient processing, is easy to install, can be used as an additional energy consumption device to be arranged in the structure, and can also be used for carrying out later-stage reinforcement on the existing structure;
2. the energy-consuming steel bar has stronger energy-consuming capability and resetting capability, can convert the bending deformation into the tensile deformation of the energy-consuming steel bar, has the characteristic of enhancing the bearing capacity after yielding, and simultaneously improves the integral ductility of the structure and reduces the residual deformation of the structure;
3. the invention can be used for supporting structures in various forms and reinforcing the positions of nodes of the existing bridges and building structures.
4. The hybrid energy consumption system and the elastic reset system are relatively independent, so that the conflict between the support energy consumption capability and the reset capability is solved, and the complexity of structural installation is reduced;
5. the invention has the performance characteristics of both a lead viscoelastic damper and a metal damper, and has the performance characteristics of speed sensitivity, low displacement sensitivity and a displacement type damper.
6. The invention can also adjust the herringbone included angle formed by the outer constraint steel plate and the inner shearing steel plate, the included angle interval is 90-180 degrees, and the energy consumption amplification function is realized at the moment, and the larger the angle is, the stronger the energy consumption amplification capability is.
Based on the reason, the invention can be widely popularized in the fields of various supporting structures such as single inclined rods, herringbone structures, inverted V-shaped structures and the like, existing bridges and frame structure nodes and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a three-dimensional view of a lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace in an embodiment of the invention.
Fig. 2 is a front view of a lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace in an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a joint in an embodiment of the present invention.
FIG. 4 is a schematic view of the connection between the inner shear steel plate and the outer constraint steel plate according to the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an elastic resetting system according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a loading shaft according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a right loading control device in the embodiment of the present invention.
Fig. 8 is a comparison graph of the state change of the energy-consuming steel column before and after loading according to the embodiment of the present invention.
In the figure: 1. a left load control device; 101. a rectangular portion; 102. a circular portion; 2. a right load control device; 3. an elastic reset system; 301. a left restraint end plate; 302. a right restraint end plate; 303. restraining the side plates; 304. a loading shaft; 305. a limit nut; 306. a slider; 307. a spring; 308. a restraining projection; 309. a displacement chamber; 4. a hybrid energy consuming system; 401. internally shearing a steel plate; 402. an outer constraint steel plate; 403. screwing down the bolt; 404. energy-consuming steel bars; 405. a round head I; 406. a round head II; 407. a damping viscoelastic material layer; 408. a lead core; 409. a spring washer; 410. a through groove.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 8, the lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace comprises an elastic resetting system 3 arranged between a left loading control device 1 and a right loading control device 2, and mixed energy dissipation systems 4 which are respectively positioned at the upper side and the lower side of the elastic resetting system 3 and are symmetrically arranged;
two ends of the elastic reset system 3 are respectively connected with the left loading control device 1 and the right loading control device 2;
the hybrid energy consumption system 4 comprises an inner shearing steel plate 401 and two outer restraining steel plates 402, one end of each of the two outer restraining steel plates 402 clamps one end of the inner shearing steel plate 401 in the middle, the other end of the inner shearing steel plate 401 is hinged to the right loading control device 2, and the other end of the outer restraining steel plate 402 is hinged to the left loading control device 1; the inner shear steel plate 401 and the outer constraint steel plate 402 are connected in a herringbone manner.
The joint of the outer constraint steel plate 402 and the inner shear steel plate 401 is connected through a tightening bolt 403, and a plurality of energy-consuming steel bars 404 which simultaneously penetrate through the inner shear steel plate 401 and the outer constraint steel plate 402 are arranged at the joint;
the inner shearing steel plate 401 is provided with a round head I405 at the joint, the outer restraining steel plate 402 is provided with a round head II 406 at the joint, the round head I405 is clamped by the round head II 406 and is connected through the tightening bolt 403, the tightening bolt 403 penetrates through the centers of the round head I405 and the round head II 406, and a plurality of energy consumption steel bars 404 are uniformly distributed around the tightening bolt 403.
At the joint, a damping viscoelastic material layer 407 is arranged between the outer constraint steel plate 402 and the inner shear steel plate 401, and the damping viscoelastic material layer 407 may be made of rubber.
At the joint, a plurality of lead cores 408 are provided through the outer restraining plate 402 and the inner shear plate 401.
The energy consumption steel bar 404 has a bar cap at both ends, and a spring washer 409 is arranged between the bar cap and the outer constraint steel plate 402.
Further, the left loading control device 1 and the right loading control device 2 are identical in structure and each comprise a rectangular part 101 and circular parts 102 positioned at the upper end and the lower end of the rectangular part;
one end, far away from the round head I405, of the inner shearing steel plate 401 is semicircular, a through groove 410 is machined in the end, and the circular portion 102 of the right loading control device 2 enters the through groove 410 and is hinged through a hinge shaft;
the end of the external restraint steel plate 402 far away from the round head II 406 is semicircular, and the end of the two external restraint steel plates 406 clamps the circular part 102 of the left loading control device 1 and is hinged through a hinge shaft.
Further, the elastic resetting system 3 comprises a left constraint end plate 301 and a right constraint end plate 302 which are arranged in a left-right symmetrical manner, and two constraint side plates 303 which are arranged in an up-down symmetrical manner, wherein two ends of each constraint side plate 303 are respectively fixedly connected with the left constraint end plate 301 and the right constraint end plate 302;
a loading shaft 304 is arranged in a space surrounded by the left constraint end plate 301, the right constraint end plate 302 and the two constraint side plates 303, and the right end of the loading shaft 304 penetrates through the right constraint end plate 302, penetrates through the middle part of the right loading control device 2 and is hinged with the right loading control device;
the left end and the right part of the loading shaft 304 are provided with limit nuts 305, two sliding blocks 306 which are sleeved on the loading shaft 304 and are in sliding connection with the loading shaft 304 are arranged between the two limit nuts 305, and a spring 307, in this example, a combined disc spring, is clamped between the two sliding blocks 306.
The inner walls of the two ends of the constraint side plate 303 are respectively provided with a constraint bulge 308 extending towards the axial direction of the loading shaft 304, and the sliding block 306 is in contact connection with the constraint bulge 308; be located the left side stop nut 305 with between the left side constraint end plate 301, be located the right side stop nut 305 with all be equipped with displacement chamber 309 between the right side constraint end plate 301, left side constraint end plate 301 with left side loading controlling means 1 is articulated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation support is characterized by comprising an elastic resetting system and mixed energy dissipation systems, wherein the elastic resetting system is arranged between a left loading control device and a right loading control device, and the mixed energy dissipation systems are respectively positioned on the upper side and the lower side of the elastic resetting system and are symmetrically arranged;
two ends of the elastic reset system are respectively connected with the left loading control device and the right loading control device;
the hybrid energy consumption system comprises an inner shearing steel plate and two outer constraint steel plates, one end of each of the two outer constraint steel plates clamps one end of the inner shearing steel plate in the middle, the other end of each of the inner shearing steel plates is hinged with the right loading control device, and the other end of each of the outer constraint steel plates is hinged with the left loading control device;
the joint of the outer constraint steel plate and the inner shear steel plate is connected through a tightening bolt, and a plurality of energy-consuming steel bars which simultaneously penetrate through the inner shear steel plate and the outer constraint steel plate are arranged at the joint;
the inner shearing steel plate and the outer constraint steel plate are connected in a herringbone mode.
2. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 1, wherein the elastic resetting system comprises a left constraint end plate and a right constraint end plate which are arranged in a left-right symmetry manner, and two constraint side plates which are arranged in an up-down symmetry manner, and two ends of each constraint side plate are respectively and fixedly connected with the left constraint end plate and the right constraint end plate;
a loading shaft is arranged in a space defined by the left constraint end plate, the right constraint end plate and the two constraint side plates, and the right end of the loading shaft penetrates through the right constraint end plate, then penetrates through the middle part of the right loading control device and is hinged with the right loading control device;
the left end and the right end of the loading shaft are provided with limit nuts, two sliding blocks which are sleeved on the loading shaft and are in sliding connection with the loading shaft are arranged between the two limit nuts, a spring is clamped between the two sliding blocks, the inner walls of the two ends of the constraint side plate are respectively provided with constraint bulges extending towards the axial direction of the loading shaft, and the sliding blocks are in contact connection with the constraint bulges; the left side is located stop nut with between the left side restraint end plate, be located the right side stop nut with all be equipped with the displacement chamber between the right side restraint end plate, left side restraint end plate with left side loading controlling means is articulated.
3. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 1, wherein the inner shearing steel plate is provided with a round head I at the joint, the outer constraint steel plate is provided with a round head II at the joint, two round heads II clamp the round head I in the middle and are connected through the tightening bolt, the tightening bolt penetrates through the centers of the round heads I and the round heads II, a plurality of energy dissipation steel bars are uniformly distributed around the tightening bolt, and two ends of each energy dissipation steel bar are tightened through nuts provided with elastic gaskets.
4. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 3, wherein the left loading control device and the right loading control device are identical in structure and comprise a rectangular portion and circular portions located at the upper end and the lower end of the rectangular portion;
one end, far away from the round head I, of the inner shearing steel plate is semicircular, a through groove is formed in the end, and the circular portion of the right loading control device enters the through groove and is hinged through a hinge shaft;
the outer restraint steel plate is far away from one end of the round head II is semicircular, and the two ends of the outer restraint steel plate clamp the circular part of the left loading control device and are hinged through a hinge shaft.
5. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 1, wherein a damping viscoelastic material layer is arranged between the outer constraint steel plate and the inner shearing steel plate at the joint.
6. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 1, wherein a plurality of lead cores penetrating through the outer constraint steel plate and the inner shearing steel plate are arranged at the joint.
7. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 1, wherein two ends of the energy dissipation steel bar are provided with bar caps, and a spring gasket is arranged between the bar caps and the friction outer plate.
8. The lead viscoelastic steel bar bending-pulling deformation conversion self-resetting energy dissipation brace as claimed in claim 2, wherein the spring is a combined disc spring, a spiral compression spring or a ring spring.
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| CN113216387A (en) * | 2021-05-18 | 2021-08-06 | 西安建筑科技大学 | Controllable energy consumption swinging column base |
| CN113389291A (en) * | 2021-06-04 | 2021-09-14 | 大连交通大学 | Lever type self-resetting energy consumption amplification type node damper |
| CN113389290A (en) * | 2021-06-04 | 2021-09-14 | 大连交通大学 | Self-resetting friction energy-consumption amplification damper |
| CN113389289A (en) * | 2021-06-04 | 2021-09-14 | 大连交通大学 | Bridge type self-resetting support with energy consumption amplification function |
| CN113389289B (en) * | 2021-06-04 | 2022-05-31 | 大连交通大学 | Bridge type self-resetting support with energy consumption amplification function |
| CN113389291B (en) * | 2021-06-04 | 2022-05-31 | 大连交通大学 | Lever type self-resetting energy consumption amplification type node damper |
| CN114718205A (en) * | 2022-03-14 | 2022-07-08 | 大连交通大学 | Self-resetting support with amplification energy consumption mechanism |
| CN114703982A (en) * | 2022-03-15 | 2022-07-05 | 大连交通大学 | Composite energy-consumption self-resetting support with amplification mechanism |
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