CN214497937U - Self-recovery type energy dissipation support - Google Patents
Self-recovery type energy dissipation support Download PDFInfo
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- CN214497937U CN214497937U CN202022714880.2U CN202022714880U CN214497937U CN 214497937 U CN214497937 U CN 214497937U CN 202022714880 U CN202022714880 U CN 202022714880U CN 214497937 U CN214497937 U CN 214497937U
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Abstract
The utility model relates to a self-recovery energy dissipation support, which comprises a middle positioning plate and self-recovery units symmetrically arranged at the left side and the right side of the middle positioning plate; the self-recovery unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, an energy-consuming steel bar, a support frame, a shape memory alloy bar and a limiting block; the inner end of the outer sleeve steel pipe is fixed with the middle positioning plate; the connecting node, the support core component, the sliding bearing plate, the energy-consuming steel bar, the support frame and the middle positioning plate are sequentially connected from outside to inside, the support core component, the sliding bearing plate, the energy-consuming steel bar and the support frame are positioned in the outer sleeve steel pipe, and the middle part of the support core component penetrates through the outer end of the outer sleeve steel pipe; the inner wall of the outer sleeve steel pipe is provided with a limiting block for preventing the sliding bearing plate from sliding outwards; a shape memory alloy bar is arranged between the outer end of the outer sleeve steel pipe and the sliding bearing plate. The utility model discloses simple structure, construction convenience belongs to building energy dissipation shock-absorbing structure field.
Description
Technical Field
The utility model relates to a building energy dissipation shock-absorbing structure, concretely relates to self-resuming type energy dissipation supports.
Background
With the development of urbanization in China, how to resist damage and destruction to engineering structures under the action of natural disasters becomes a problem which most engineers need to pay attention to and a key task in the engineering design process.
At present, the building structure earthquake resistance generally adopts the structure damping increase and the isolation layer is arranged to dissipate the energy of the earthquake to the structure, the traditional buckling restrained brace component mainly comprises an inner core material, an outer constraint component, an unbonded expandable material and an unbonded sliding interface, and the traditional buckling restrained brace component has the functions of a common steel support and a metal energy dissipation damper. The buckling-restrained brace buckles when a strong earthquake happens, has excellent energy consumption capability and ductility, and obviously reduces the earthquake damage of the main body structure. The traditional buckling restrained brace has obvious yield deformation, and the buckling restrained brace component can provide good lateral resistance for the structure.
In fact, because the yield bearing capacity of the traditional buckling restrained brace is large, when the earthquake force is small, the brace component cannot enter a buckling state in time, and the energy consumption capacity of the component cannot be exerted. When the earthquake force is large, the supporting member enters a buckling state, peripheral nodes connected with the member are seriously damaged, the residual deformation is large, the difficulty of repairing the main body structure after disaster is large, the cost is high, and the restoration of the reconstruction work and the production order after the disaster is not facilitated.
Therefore, the self-recovery energy dissipation support device can consume the earthquake energy born by the engineering structure under the action of small earthquake and large earthquake, and simultaneously can reduce the residual deformation of the member through the self-recovery capability, so that the residual deformation of the main structure caused by the damage of the support member can be reduced, the difficulty and the cost of post-disaster repair are reduced, the rapid reconstruction and the rapid recovery of the life order after the disaster are facilitated, and the guarantee is provided for the life and property safety of people.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model aims at: the self-recovery energy dissipation support not only can effectively dissipate seismic energy, but also has self-recovery capability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a self-recovery energy dissipation support comprises a middle positioning plate and self-recovery units positioned on the left side and the right side of the middle positioning plate, wherein the two self-recovery units have the same structure and are arranged in a left-right symmetrical mode relative to the middle positioning plate; the self-recovery unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, an energy-consuming steel bar, a support frame, a shape memory alloy bar and a limiting block; the inner end of the outer sleeve steel pipe is fixed with the middle positioning plate; the connecting node, the support core component, the sliding bearing plate, the energy-consuming steel bar, the support frame and the middle positioning plate are sequentially connected from outside to inside, the section of the support core component close to the inside, the sliding bearing plate, the energy-consuming steel bar and the support frame are positioned in the outer sleeve steel pipe, and the middle of the support core component penetrates through the outer end of the outer sleeve steel pipe; the inner wall of the outer sleeve steel pipe is provided with a limiting block for preventing the sliding bearing plate from sliding outwards; a shape memory alloy bar is arranged between the outer end of the outer sleeve steel pipe and the sliding bearing plate.
Preferably, the two self-healing units are arranged in a line.
Preferably, the support frame comprises a fixed bearing plate and a steel frame support, the fixed bearing plate, the steel frame support and the middle positioning plate on one side are sequentially connected from outside to inside, and the other side is arranged symmetrically.
Preferably, the number of the steel frame supports is multiple, and the steel frame supports are arranged between the fixed bearing plate and the middle positioning plate in parallel.
Preferably, the self-recovery unit further comprises two groups of limiting devices, one group of limiting devices is fixed on the inner side of the sliding bearing plate, and the other group of limiting devices is fixed on the outer side of the fixed bearing plate; each group of limiting devices comprises four limiting plates which are arranged in a cross shape, and a space for clamping the energy consumption steel bar is reserved in the middle.
Preferably, the outer end of the shape memory alloy rod penetrates through the outer end of the outer sleeve steel pipe, and the outer end of the shape memory alloy rod is connected with a fixing bolt, so that the outer end of the shape memory alloy rod is fixed at the outer end of the outer sleeve steel pipe; the inner end of the shape memory alloy rod penetrates through the sliding bearing plate, and the inner end of the shape memory alloy rod is connected with the fixing bolt, so that the inner end of the shape memory alloy rod is fixed on the sliding bearing plate.
Preferably, the support core member is a rod-shaped structure with a square or round cross section; the outer sleeve steel pipe is a square pipe, the inner end of the outer sleeve steel pipe penetrates through the outer sleeve steel pipe, and the outer end face of the outer sleeve steel pipe is provided with a hole for the support core component to penetrate through and a hole for the shape memory alloy rod to penetrate through; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square; the cross section of the energy-consuming steel bar is square; the number of the steel frame supports is four, and the cross section is square; the number of the shape memory alloy rods is two, the cross section of the shape memory alloy rods is circular, and the shape memory alloy rods are arranged above and below or in front and back of the support core component.
Preferably, rigid connection is adopted between the support core component and the sliding bearing plate, between the fixed bearing plate and the steel frame support, and between the steel frame support and the middle positioning plate; the main body structure is provided with a gusset plate, and the connecting node is connected with the gusset plate through a fixing bolt.
An energy dissipation method of a self-recovery energy dissipation support adopts the self-recovery energy dissipation support, and dissipates energy through the telescopic deformation of a shape memory alloy rod and an energy dissipation steel rod so as to improve the bearing capacity of a component; providing self-healing capability through the shape memory alloy rod; when an earthquake occurs, the two self-recovery units consume energy synchronously; after the earthquake, the two self-recovery units are synchronously reset.
Preferably, the corresponding bearing capacity is provided by designing the size, the length and the cross section area of the energy consumption steel bar, and the corresponding bearing capacity and the self-recovery capacity are provided by designing the number, the positions, the lengths and the cross section areas of the shape memory alloy bars; the bearing capacity of the two self-recovery units is the same, and the self-recovery capacity of the two self-recovery units is the same.
In general, the utility model has the advantages as follows:
1. under the design that the original main structure is ensured to be possible, the self-recovery type energy dissipation support can increase the bearing capacity of the main structure on the basis of not increasing the size of the support member, meanwhile, the corresponding bearing capacity and self-recovery capacity are provided for the member by using the number, the position, the length and the cross sectional area of the shape memory alloy rods on the left side and the right side, the length of the support core member on the left side is the same as that on the right side, and the bearing capacity of the self-recovery units on the two sides is the same, so when the self-recovery units on the left side and the right side are in a buckling energy consumption state simultaneously when the self-recovery units on the left side and the right side are subjected to earthquake action. When the earthquake happens, the shape memory alloy rods in the components are in a tightened or loosened state, so that the energy input by the earthquake is dissipated, the supporting effect is exerted, the whole structure is protected from being damaged, the residual deformation after the earthquake is reduced, the repairing cost of the building after the earthquake is reduced, the national manpower, material resources and financial resources are saved, and the time for recovering after the earthquake is reduced. The self-recovery type energy dissipation support has simple structure, convenient construction and high practical value.
2. The gap between the outer jacket steel tube and the support core member is not filled with any material. When the shape memory alloy rod deforms, the energy consumption steel rod also deforms at the same time, and the component is compressed and deformed to dissipate partial energy borne by the component, so that the bearing capacity of the component is improved. The energy-consuming steel bar is used as a main energy-consuming component, and the energy borne by the supporting component is dissipated through the tension-compression deformation of the energy-consuming steel bar. The self-recovery energy dissipation support can consume seismic energy born by an engineering structure under the action of small earthquake and large earthquake, and simultaneously can provide corresponding self-recovery capability through the shape memory alloy rod, so that the residual deformation of a main body structure caused by the damage of a support member can be reduced, the difficulty and the cost of post-disaster repair are reduced, and the post-disaster recovery and the recovery of life order are facilitated.
3. The rigid connection is adopted, so that the connection part can be ensured to be in a stable state.
4. The utility model can be widely applied to frame structures, steel structures and high-rise structures, and can also be used in assembly type structures; the problem of traditional buckling-restrained energy dissipation brace can't get back to the original point through self under the earthquake effect, and lead to the excessive residual deformation of overall structure after the earthquake is solved.
Drawings
Figure 1 is a schematic structural view of a self-restoring energy-dissipating support.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Fig. 3 is a cross-sectional view B-B of fig. 1.
Fig. 4 is a cross-sectional view of C-C in fig. 1.
Fig. 5 is a cross-sectional view D-D in fig. 1.
Figure 6 is a diagram of the working state of the self-recovery energy dissipation support under the action of earthquake.
Figure 7 is a diagram of the working state of the self-recovery energy dissipation support which is reset after earthquake.
Wherein, 1 is a shape memory alloy rod, 2 is a sliding bearing plate, 3 is a supporting core component, 4 is a fixing bolt, 5 is a middle positioning plate, 6 is a steel frame support, 7 is a limiting plate, 8 is a limiting block, 9 is a connecting node, 10 is an outer sleeve steel pipe, 11 is a self-recovery device, 12 is an energy-consuming steel rod, and 13 is a fixing bearing plate.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The utility model provides a self recovery type energy dissipation support, includes middle part locating plate and the self recovery unit that is located the middle part locating plate left and right sides, and two self recovery units's structure is the same, sets up for middle part locating plate bilateral symmetry. The earthquake-proof beam column is used for relieving the damage of the beam column connection under the action of an earthquake and relieving the damage and residual deformation of the main body structure.
The self-recovery unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, an energy-consuming steel bar, a support frame, a shape memory alloy bar and a limiting block; the inner end of the outer sleeve steel pipe is fixed with the middle positioning plate; the connecting node, the support core component, the sliding bearing plate, the energy-consuming steel bar, the support frame and the middle positioning plate are sequentially connected from outside to inside, the section of the support core component close to the inside, the sliding bearing plate, the energy-consuming steel bar and the support frame are positioned in the outer sleeve steel pipe, and the middle of the support core component penetrates through the outer end of the outer sleeve steel pipe; the inner wall of the outer sleeve steel pipe is provided with a limiting block for preventing the sliding bearing plate from sliding outwards; a shape memory alloy bar is arranged between the outer end of the outer sleeve steel pipe and the sliding bearing plate. The shape memory alloy rod is in a pre-stretched state in an initial state. The corresponding limiting blocks are arranged according to the requirement of the bearing capacity of the component, so that the situation that the resetting capacity of the shape memory alloy rod is too large and the original design size is exceeded is prevented. Meanwhile, the position of the limiting block can be adjusted according to the design requirement.
A certain gap is reserved between the energy-consumption steel bar and the middle positioning plate, so that when the connecting node is subjected to axial load, the load is completely transmitted to the internal self-recovery device through the core supporting member, the shape memory alloy bar in the self-recovery device consumes seismic energy through continuous compression and stretching, and the damage and the participation deformation of the main body structure are reduced. Under the action of axial load, the energy-consuming steel bar dissipates part of energy through tension-compression deformation, and the bearing capacity of the component is improved.
The two self-recovery units are arranged in a line.
The support frame includes that fixed bearing plate and steelframe support, fixed bearing plate, steelframe support, middle part locating plate meet from outside-in proper order.
The quantity that the steelframe supported is many, and the setting that is parallel to each other is between fixed bearing plate and middle part locating plate.
The self-recovery unit also comprises two groups of limiting devices, one group of limiting devices is fixed on the inner side of the sliding bearing plate, and the other group of limiting devices is fixed on the outer side of the fixed bearing plate; each group of limiting devices comprises four limiting plates which are arranged in a cross shape, and a space for clamping the energy consumption steel bar is reserved in the middle. The limiting plate can prevent the energy-consuming steel bar from sliding laterally, and the sliding can reduce the energy-consuming capacity of the component.
The outer end of the shape memory alloy rod penetrates through the outer end of the outer sleeve steel pipe, and the outer end of the shape memory alloy rod is connected with a fixing bolt, so that the outer end of the shape memory alloy rod is installed at the outer end of the outer sleeve steel pipe; the inner end of the shape memory alloy rod penetrates through the sliding bearing plate, and the inner end of the shape memory alloy rod is connected with the fixing bolt, so that the inner end of the shape memory alloy rod is installed on the sliding bearing plate. The size of the specification of the shape memory alloy rods on the left side and the right side directly influences the bearing capacity of the self-recovery type energy dissipation support, the specifications (section area, number, specification, length and installation position) of the shape memory alloy rods on the left side and the right side can be designed according to the actual requirements of projects, the size of self-resetting force on the left side and the right side can be matched with a support core component, elasticity of the self-resetting force can be kept under the action of an earthquake, and the self-resetting force can be dissipated through tension and compression deformation under the action of the earthquake and cannot fail.
The supporting core component is a rod-shaped structure with a square or round cross section; the outer sleeve steel pipe is a square pipe, the inner end of the outer sleeve steel pipe penetrates through the outer sleeve steel pipe, and the outer end face of the outer sleeve steel pipe is provided with a hole for the support core component to penetrate through and a hole for the shape memory alloy rod to penetrate through; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square; the cross section of the energy-consuming steel bar is square; the number of the steel frame supports is four, and the cross section is square; the number of the shape memory alloy rods is two, the cross section of the shape memory alloy rods is circular, and the shape memory alloy rods are arranged above and below or in front and back of the support core component.
Rigid connection, such as a welding mode, is adopted between the support core component and the sliding bearing plate, between the fixed bearing plate and the steel frame support, and between the steel frame support and the middle positioning plate, so that damage is avoided under the action of axial tension. The main body structure is provided with a gusset plate, and the connecting node is connected with the gusset plate through a fixing bolt. The concrete connection mode is as follows: and (3) welding a joint plate at a relevant part (such as a beam-column joint), wherein the joint plate is provided with bolt holes corresponding to the connecting joints, and the joint plate and the connecting joints are directly connected by adopting fixing bolts. The middle positioning plate and the outer sleeve steel pipe are connected by welding, so that the connection between the middle positioning plate and the outer sleeve steel pipe is reliable. The middle positioning plate is also a key part of stress, the middle positioning plate needs to be reliably connected with the outer sleeve steel pipe when stressed, and the middle positioning plate and the outer sleeve steel pipe are guaranteed not to be broken under the action of a large shock; therefore, the size of the middle positioning plate can be designed according to the performance requirement of the whole self-recovery energy dissipation support in actual use, and the mechanical properties of the left and right self-recovery units and the whole energy dissipation support are further ensured.
The shape memory alloy rod is preferably made of Ni-Ti alloy materials; the Ni-Ti series shape memory alloy has good mechanical property, fatigue resistance, wear resistance, corrosion resistance and high shape memory recovery rate, and is widely applied in the engineering field.
An energy dissipation method of a self-recovery energy dissipation support adopts the self-recovery energy dissipation support, and dissipates energy through the telescopic deformation of a shape memory alloy rod and an energy dissipation steel rod so as to improve the bearing capacity of a component; providing self-healing capability through the shape memory alloy rod; when an earthquake occurs, the two self-recovery units consume energy synchronously; after the earthquake, the two self-recovery units are synchronously reset.
Corresponding bearing capacity is provided by designing the size, the length and the cross sectional area of the energy consumption steel bar, and corresponding bearing capacity and self-recovery capacity are provided by designing the number, the position, the length and the cross sectional area of the shape memory alloy bars; the bearing capacity of the two self-recovery units is the same, and the self-recovery capacity of the two self-recovery units is the same. Therefore, when the self-recovery units on two sides enter a buckling energy-consuming state simultaneously when the self-recovery units are subjected to earthquake action, and the shape memory alloy rod provides corresponding tensile stress.
The utility model has the advantages that: in order to prevent the member from being bent integrally when the member is pressed in the axial direction, an outer steel pipe is applied outside the member, so that the integral rigidity inside and outside the plane of the support is increased, and the integral stability of the energy-consuming support is improved. The length of the support core components on the left side and the right side is the same, and the self-recovery units on the left side and the right side are completely the same. When the self-recovery units on the left side and the right side are in an energy-consumption state simultaneously when the self-recovery units are subjected to the earthquake action, the self-recovery devices on the left side and the right side bear the tension and compression load action, and the earthquake energy is dissipated through the deformation of the shape memory alloy rod and the energy-consumption steel rod, so that the inner support core component is ensured not to buckle under the earthquake action. When the bearing capacity of the energy dissipation support is determined by the strength of the shape memory alloy rod and the energy dissipation steel rod, the shape memory alloy rod and the energy dissipation steel rod can contract and deform under the action of tension and compression loads, and the energy dissipation effect of the shape memory alloy rod and the energy dissipation steel rod is fully exerted. When the component is subjected to small axial force, the support core components on the two sides of the component are simultaneously closed to the middle under the action of pressure, and at the moment, the shape memory alloy rod on one side is in a stretching state, but the support core components are not bent. When the axial force continuously increases, the bearing capacity exceeds the designed bearing capacity of the buckling-restrained components at the two sides, the supporting core components at the two sides continuously approach to the middle under the action of pressure, and the shape memory alloy rods at the two sides are stretched to ensure that the supporting core components do not yield. Correspondingly, core components at two ends of the energy dissipation support extend outwards under the action of the tension of the shape memory alloy rod, and the shape memory alloy rod stretches back along the middle positioning plate. And corresponding limiting blocks are arranged to ensure that the contraction of the shape memory alloy rod does not exceed the range which the shape memory alloy rod can bear. Therefore, under the action of repeated tension and compression loads, the shape memory alloy rod is repeatedly in a telescopic deformation state, and the energy consumption steel rod is continuously compressed and stretched to perform deformation energy consumption under the action of axial force, so that the aims of consuming seismic energy and protecting a main body structure are fulfilled. And after the earthquake force disappears, the self-recovery energy dissipation support can enable the component to recover to the initial state through the restoring force provided by the corresponding shape memory alloy rods on the left side and the right side, and the residual deformation of the whole structure is reduced. The utility model provides a traditional buckling-restrained energy dissipation support can't dissipate energy under little shake effect, support to warp too big after the shake simultaneously and lead to overall structure repair cost higher after the shake, repair time process is difficult to carry out prosthetic problem even, effectively alleviates overall structure produced damage and residual deformation under the earthquake effect. The self-recovery energy dissipation support can be produced in a factory prefabrication mode, is installed through bolts on site, and is high in construction speed, energy-saving and environment-friendly. The utility model is suitable for an among the engineering building structure, especially among the shock attenuation building of industrialization.
In addition to the manner mentioned in the present embodiment, the shape memory alloy rods can be designed accordingly according to the bearing capacity and self-restorability, and arranged at the upper, lower, front and rear positions of the support core member. Each self-healing unit may also include shape memory alloy rods of other shapes and types. These variations are all within the scope of the present invention.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. The utility model provides a self-resuming type energy dissipation support which characterized in that: the self-recovery device comprises a middle positioning plate and self-recovery units positioned on the left side and the right side of the middle positioning plate, wherein the two self-recovery units have the same structure and are arranged in a left-right symmetrical mode relative to the middle positioning plate; the self-recovery unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, an energy-consuming steel bar, a support frame, a shape memory alloy bar and a limiting block; the inner end of the outer sleeve steel pipe is fixed with the middle positioning plate; the connecting node, the support core component, the sliding bearing plate, the energy-consuming steel bar, the support frame and the middle positioning plate are sequentially connected from outside to inside, the section of the support core component close to the inside, the sliding bearing plate, the energy-consuming steel bar and the support frame are positioned in the outer sleeve steel pipe, and the middle of the support core component penetrates through the outer end of the outer sleeve steel pipe; the inner wall of the outer sleeve steel pipe is provided with a limiting block for preventing the sliding bearing plate from sliding outwards; a shape memory alloy bar is arranged between the outer end of the outer sleeve steel pipe and the sliding bearing plate.
2. A self-healing energy-dissipating support according to claim 1, wherein: the two self-recovery units are arranged in a line.
3. A self-healing energy-dissipating support according to claim 1, wherein: the support frame includes that fixed bearing plate and steelframe support, and fixed bearing plate, steelframe support, the middle part locating plate of one side meet from the outside inwards in proper order, and the opposite side adopts the mode of symmetrical arrangement.
4. A self-healing energy-dissipating support according to claim 3, wherein: the quantity that the steelframe supported is many, and the setting that is parallel to each other is between fixed bearing plate and middle part locating plate.
5. A self-healing energy-dissipating support according to claim 3, wherein: the self-recovery unit also comprises two groups of limiting devices, one group of limiting devices is fixed on the inner side of the sliding bearing plate, and the other group of limiting devices is fixed on the outer side of the fixed bearing plate; each group of limiting devices comprises four limiting plates which are arranged in a cross shape, and a space for clamping the energy consumption steel bar is reserved in the middle.
6. A self-healing energy-dissipating support according to claim 1, wherein: the outer end of the shape memory alloy rod penetrates through the outer end of the outer sleeve steel pipe, and the outer end of the shape memory alloy rod is connected with a fixing bolt, so that the outer end of the shape memory alloy rod is fixed at the outer end of the outer sleeve steel pipe; the inner end of the shape memory alloy rod penetrates through the sliding bearing plate, and the inner end of the shape memory alloy rod is connected with the fixing bolt, so that the inner end of the shape memory alloy rod is fixed on the sliding bearing plate.
7. A self-healing energy-dissipating support according to claim 3, wherein: the supporting core component is a rod-shaped structure with a square or round cross section; the outer sleeve steel pipe is a square pipe, the inner end of the outer sleeve steel pipe penetrates through the outer sleeve steel pipe, and the outer end face of the outer sleeve steel pipe is provided with a hole for the support core component to penetrate through and a hole for the shape memory alloy rod to penetrate through; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square; the cross section of the energy-consuming steel bar is square; the number of the steel frame supports is four, and the cross section is square; the number of the shape memory alloy rods is two, the cross section of the shape memory alloy rods is circular, and the shape memory alloy rods are arranged above and below or in front and back of the support core component.
8. A self-healing energy-dissipating support according to claim 3, wherein: rigid connection is adopted between the support core component and the sliding bearing plate, between the fixed bearing plate and the steel frame support, and between the steel frame support and the middle positioning plate; the main body structure is provided with a gusset plate, and the connecting node is connected with the gusset plate through a fixing bolt.
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| CN112502307A (en) * | 2020-11-20 | 2021-03-16 | 广州大学 | Self-recovery type energy dissipation support and energy dissipation method thereof |
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