CN219732279U - Assembled bolted connection is from restoring to throne beam column node structure - Google Patents
Assembled bolted connection is from restoring to throne beam column node structure Download PDFInfo
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- CN219732279U CN219732279U CN202320705516.0U CN202320705516U CN219732279U CN 219732279 U CN219732279 U CN 219732279U CN 202320705516 U CN202320705516 U CN 202320705516U CN 219732279 U CN219732279 U CN 219732279U
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- 239000011178 precast concrete Substances 0.000 claims abstract description 122
- 238000005265 energy consumption Methods 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 108
- 239000010959 steel Substances 0.000 claims description 108
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 11
- 210000002435 tendon Anatomy 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses an assembled bolt connection self-resetting beam column node structure, which relates to the technical field of building structure earthquake resistance and comprises the following components: the device comprises a precast concrete beam, a precast concrete column, a plurality of positioning bolts, a plurality of energy consumption pieces and a plurality of resetting pieces, wherein one end of each positioning bolt penetrates through the precast concrete column and can be detachably and fixedly connected with the precast concrete column, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam; one end of the energy consumption piece penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, and the other end of the energy consumption piece is detachably and fixedly connected with the precast concrete beam; one end fixed connection that precast concrete post was kept away from to the one end of piece that resets and precast concrete post, the one side fixed connection that precast concrete post was kept away from to the other end and precast concrete post effectively strengthen the power consumption ability of node structure, reduce the damage and the destruction of structure under the seismic action, and can automatic re-setting.
Description
Technical Field
The utility model relates to the technical field of building structure earthquake resistance, in particular to an assembled bolt connection self-resetting beam column node structure.
Background
In order to achieve the purpose of 'equivalent cast-in-situ' of the whole structure, the traditional assembled reinforced concrete beam column node generally adopts a node cast-in-situ or secondary casting method. However, this method requires a large amount of wet work, and has the disadvantages of complicated site construction, difficult control of construction quality and the like, and cannot exert the advantages of assembly. In recent years, dry beam-column connection techniques typified by bolting, welding, and the like have been increasingly developed. A large number of experimental research results show that the existing connection mode can ensure the rigidity and bearing capacity of the node connection area, the stress is reliable, the energy consumption is poor, and the grouting position is easy to generate brittle failure under the action of repeated earthquake load; after being destroyed due to earthquake or other reasons, the deformation degree is large and the self-repairing is not realized. Chinese patent CN108867861a discloses that the bolt and reinforcement pin prefabricated concrete beam-column edge node adopts a "dry" connection to form the prefabricated concrete frame beam-column node, and the site has no wet operation and high installation efficiency; the connecting steel bars can effectively transfer tension and pressure to form rigid connection, so that the stress performance of the beam column connecting node is guaranteed, meanwhile, the connecting steel bars are unbonded in the pore canal, the deformation capacity is good, the high anti-seismic energy consumption capacity is achieved, and the structural performance of the connecting node under the action of earthquake load can be effectively guaranteed. However, the connection steel bar at the Liang Zhubian node cannot be replaced conveniently, and after the connection steel bar is used for a period of time, the energy consumption capacity is reduced relatively due to loss, and the structure is still easy to damage and destroy under the action of an earthquake; moreover, the Liang Zhubian node does not have a self-healing correlation. Therefore, there is a need for a beam-column node structure that can effectively enhance the energy consumption capability of the node structure, reduce the damage and destruction of the structure under the action of an earthquake, and automatically reset.
Disclosure of Invention
The utility model aims to provide an assembled type bolt connection self-resetting beam column node structure, which solves the problems in the prior art, effectively enhances the energy consumption capability of the node structure, reduces the damage and the destruction of the structure under the action of an earthquake, and can automatically reset.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides an assembled bolt connection self-resetting beam column node structure, which comprises: the device comprises a precast concrete beam, a precast concrete column, a plurality of positioning bolts, a plurality of energy consumption pieces and a plurality of resetting pieces, wherein one end of each positioning bolt penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam; one end of the energy dissipation piece penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, the other end of the energy dissipation piece is detachably and fixedly connected with the precast concrete beam, and at least one energy dissipation piece is uniformly distributed at the top and the bottom of the precast concrete beam; the restoring piece penetrates through the precast concrete beam and the precast concrete column, one end of the restoring piece is fixedly connected with one end, away from the precast concrete column, of the precast concrete beam, and the other end of the restoring piece is fixedly connected with one side, away from the precast concrete beam, of the precast concrete column.
Preferably, a plurality of first steel pipes are arranged in the precast concrete beam, the first steel pipes are used for replacing longitudinal steel bars in the precast concrete beam, a plurality of second steel pipes are embedded in the precast concrete column, the first steel pipes are correspondingly arranged and communicated with the second steel pipes, and one reset piece is used for penetrating through a hole channel in the first steel pipes and the second steel pipes, and two ends of the reset piece are fixedly connected with the precast concrete column and the precast concrete beam respectively.
Preferably, the reset piece is a prestressed tendon and an anchorage device, two ends of the prestressed tendon after passing through the pore canal in the first steel tube and the second steel tube are respectively fixedly connected with the precast concrete column and the precast concrete beam through the anchorage device, an unbonded micro-expansion material is filled between the prestressed tendon in the first steel tube and the first steel tube, and an unbonded micro-expansion material is filled between the prestressed tendon in the second steel tube and the second steel tube.
Preferably, the precast concrete beam comprises a first beam body and a second beam body, the cross-sectional dimension of the first beam body is larger than that of the second beam body, the center line of the first beam body coincides with that of the second beam body, the parts, higher than and lower than that of the second beam body, of the first beam body are energy consumption piece connecting parts, the energy consumption piece connecting parts are provided with a plurality of third steel pipes, a plurality of fourth steel pipes are embedded in the precast concrete column, the fourth steel pipes are correspondingly arranged and communicated with the third steel pipes, and two ends of one energy consumption piece, which pass through one fourth steel pipe and one third steel pipe, are respectively fixed with the energy consumption piece connecting parts and the precast concrete column.
Preferably, the energy dissipation member comprises an energy dissipation bolt and a plurality of first fixing nuts, and two ends of the energy dissipation bolt, which penetrate through one fourth steel pipe and one third steel pipe, are respectively and fixedly connected with the first fixing nuts through threads.
Preferably, the device further comprises a post embedded steel plate and a beam embedded steel plate, wherein the post embedded steel plate is fixedly arranged on one side of the precast concrete column away from the precast concrete beam, the beam embedded steel plate is fixedly arranged on one side of the precast concrete beam close to the precast concrete column, and the post embedded steel plate and the beam embedded steel plate are respectively provided with a through hole for the positioning bolt, the energy consumption piece and the reset piece to pass through.
Preferably, the concrete column further comprises a plurality of side wall frame shells and a plurality of second fixing nuts, wherein each side wall frame shell is fixedly connected with the middle part of one side of the beam embedded steel plate, which is far away from the precast concrete column, a groove for placing the side wall frame shells is formed in the precast concrete beam, the side wall frame shells are provided with operation openings, and the positioning bolts penetrate through the beam embedded steel plate and extend into the side wall frame shells to be fixedly connected with the second fixing nuts through threads.
Compared with the prior art, the utility model has the following technical effects:
the utility model provides an assembled bolt connection self-resetting beam column node structure, which is characterized in that energy consumption pieces are arranged to enable plastic behaviors to be concentrated on the energy consumption pieces under the action of an earthquake, the energy consumption pieces can be detached and replaced, the post-earthquake repair capability is improved, and the repair is convenient and efficient; the anti-seismic toughness requirements under multiple earthquake levels are met by controlling the damage sequence, in addition, the reset piece is arranged, automatic reset is realized by arranging the reset piece, the residual displacement of the structure under the earthquake is reduced, the self-reset capability of beam column nodes is improved, and meanwhile, the reset piece can generate relative sliding relative to the precast concrete beams and columns, so that the anti-seismic toughness device has good energy consumption capability; all components can be prefabricated in a factory, only the assembly and prestress tensioning are needed on site, the cost and the environmental pollution are reduced, and the development concept of green, environment-friendly, efficient and energy-saving of the assembled building is met.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an assembled bolted self-resetting beam column node structure provided by the utility model.
Fig. 2 is a front view of a self-resetting beam column node structure for assembly type bolting according to the present utility model.
Fig. 3 is a schematic structural view of a precast concrete beam in an assembled type bolted self-resetting beam column node structure.
Fig. 4 is a schematic view of a prefabricated concrete column in an assembled bolted self-restoring beam column node structure provided by the utility model.
Fig. 5 is a schematic structural view of a beam pre-buried steel plate and a side frame shell of a precast concrete beam.
In the figure: 1. prefabricating a concrete beam; 2. prefabricating a concrete column; 3. an anchor; 4. a second fixing nut; 5. a third steel pipe; 6. an energy consumption bolt; 7. a first steel pipe; 8. prestress rib; 9. column embedded steel plates; 10. a side frame shell; 11. pre-buried steel plates of the beam; 12. positioning bolts; 13. a second steel pipe; 14. a fourth steel pipe; 15. and a first fixing nut.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide an assembled type bolt connection self-resetting beam column node structure, which solves the problems in the prior art, effectively enhances the energy consumption capability of the node structure, reduces the damage and the destruction of the structure under the action of an earthquake, and can automatically reset.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Example 1
The embodiment provides a self-resetting beam column node structure of assembled bolt connection, as shown in fig. 1 to 5, comprising: the device comprises a precast concrete beam 1, a precast concrete column 2, a plurality of positioning bolts 12, a plurality of energy consumption pieces and a plurality of reset pieces, wherein one end of each positioning bolt 12 penetrates through the precast concrete column 2 and is detachably and fixedly connected with the precast concrete column 2, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam 1; one end of the energy dissipation piece penetrates through the precast concrete column 2 and is detachably and fixedly connected with the precast concrete column 2, the other end of the energy dissipation piece is detachably and fixedly connected with the precast concrete beam 1, and at least one energy dissipation piece is uniformly distributed at the top and the bottom of the precast concrete beam 1; the restoring piece penetrates through the precast concrete beam 1 and the precast concrete column 2, one end of the restoring piece is fixedly connected with one end of the precast concrete beam 1, which is far away from the precast concrete column 2, the other end of the restoring piece is fixedly connected with one side of the precast concrete column 2, which is far away from the precast concrete beam 1, and by arranging the energy consumption piece which is a member with low yield strength, the plastic behavior can be concentrated on the energy consumption piece under the action of an earthquake, the energy consumption piece can be detached and replaced, the post-earthquake repairing capability is improved, and the repairing is convenient and efficient; the anti-seismic toughness requirements under multiple earthquake levels are met by controlling the damage sequence, in addition, the reset piece is arranged, automatic reset is realized by arranging the reset piece, the residual displacement of the structure under the earthquake is reduced, the self-reset capability of beam column nodes is improved, and meanwhile, the reset piece can generate relative sliding relative to the precast concrete beams and columns, so that the anti-seismic toughness device has good energy consumption capability; all components can be prefabricated in a factory, only the assembly and prestress tensioning are needed on site, the cost and the environmental pollution are reduced, and the development concept of green, environment-friendly, efficient and energy-saving of the assembled building is met.
In a preferred embodiment, a plurality of first steel pipes 7 are arranged in the precast concrete beam 1, the first steel pipes 7 are used for replacing longitudinal steel bars in the precast concrete beam 1, the steel bar consumption of the precast concrete beam 1 is reduced, a plurality of second steel pipes 13 are arranged at positions of the precast concrete column 2 corresponding to the first steel pipes 7 and are communicated with the first steel pipes 7, and a reset piece is used for penetrating through holes in the first steel pipes 7 and the second steel pipes 13 and fixedly connecting the rear two ends of the hole channels in the precast concrete column 2 and the precast concrete beam 1 respectively, so that the dead weight of the precast concrete beam is reduced while the steel bar consumption is saved. The unbonded prestressed tendons 8 bear the stress function of the original stress longitudinal tendons, and the thin-wall steel pipe pore canal bears the structure function of the original stress longitudinal tendons. The self-resetting function is provided for the node under the condition of not reducing the original performance of the structure.
In a preferred embodiment, the reset piece is a prestressed rib 8 and an anchorage device 3, two ends of the prestressed rib 8 after passing through the pore canal in the first steel pipe 7 and the second steel pipe 13 are respectively fixedly connected with the precast concrete column 2 and the precast concrete beam 1 through the anchorage device 3, unbonded micro-expansion materials are filled in the first steel pipe 7 and the second steel pipe 13, the prestressed rib 8 can freely slide in the reserved pore canal, the number of the prestressed ribs 8 and the tension control stress are determined according to calculation, the prestressed rib 8 can be ensured to keep elasticity under the rare earthquake corresponding to the fortification intensity, the prestressed rib 8 is an unbonded prestressed rib 8, and the unbonded prestressed rib 8 is an unbonded high-strength low-relaxation steel strand coated with anti-corrosion grease and a polyethylene sheath.
In a preferred embodiment, the precast concrete beam 1 comprises a first beam body and a second beam body, the cross-sectional dimension of the first beam body is larger than that of the second beam body, the center line of the first beam body coincides with that of the second beam body, the part of the first beam body higher than and lower than that of the second beam body is an energy consumption piece connecting part, the energy consumption piece connecting part is provided with proper construction steel bars, the energy consumption piece connecting part is provided with a plurality of third steel pipes 5, the precast concrete column 2 is provided with a fourth steel pipe 14 at the corresponding position with the third steel pipes 5, the fourth steel pipe 14 is communicated with the third steel pipes 5, two ends of one energy consumption piece penetrating through one fourth steel pipe 14 and one third steel pipe 5 are respectively fixed with the energy consumption piece connecting part and the precast concrete column 2, and the precast concrete beam expands the cross section at the connecting part, so that the connecting node cannot be damaged before the precast concrete integral member, and accords with the concept of 'strong node and weak member'.
In a preferred embodiment, the energy dissipation member comprises an energy dissipation bolt 6 and a plurality of first fixing nuts 15, the two ends of the energy dissipation bolt 6 passing through a fourth steel pipe 14 and a third steel pipe 5 are respectively and fixedly connected with the first fixing nuts 15 through threads, the energy dissipation bolt 6 is made of a material with low yield strength, the energy dissipation bolt 6 is subjected to yielding deformation firstly to consume energy, the inner diameters of the third steel pipe 5 and the fourth steel pipe 14 are 2-3mm larger than the outer diameter of the energy dissipation bolt 6, and unbonded micro-expansion materials are filled in the third steel pipe 5 and the fourth steel pipe 14, so that the steel bars can freely slide in a pore canal and can be easily installed or detached.
In a preferred embodiment, the assembled bolted connection is from restoring to throne beam column node structure still includes post pre-buried steel sheet 9 and pre-buried steel sheet 11 of roof beam, and post pre-buried steel sheet 9 is fixed to be set up in precast concrete post 2 and keep away from precast concrete beam 1's one side, and beam pre-buried steel sheet 11 is fixed to be set up in precast concrete beam 1 and is close to precast concrete post 2's one side, all is provided with the through-hole that is used for locating bolt 12, power consumption piece and restoring to throne the piece on post pre-buried steel sheet 11, and post pre-buried steel sheet 9 can improve reinforced concrete prefabricated bearing capacity.
In a preferred embodiment, the assembled bolt connection is from restoring to throne beam column node structure still includes a plurality of side wall frame shells 10 and a plurality of second fixation nut 4, the middle part fixed connection of each side wall frame shell 10 and beam pre-buried steel sheet 11 one side of keeping away from precast concrete post 2, and positioning bolt 12 pass beam pre-buried steel sheet 11 stretch into side wall frame shell 10 inside after with second fixation nut 4 threaded connection fixed, be provided with the recess of placing the side wall frame shell on the precast concrete roof beam, side wall frame shell is provided with the operation opening, operating personnel operating tool stretches into the operation opening and fixes or dismantle positioning bolt, side wall frame shell 10 sets aside working space for positioning bolt 12 installation, positioning bolt 12 can provide shear bearing capacity when guaranteeing that the node location is accurate.
Example two
The embodiment also provides a construction method of the self-resetting beam column node structure by the assembly type bolt connection, which comprises the following steps:
processing and manufacturing a precast concrete beam 1;
processing and manufacturing a precast concrete column 2;
installing a positioning bolt 12 to connect and fix the precast concrete beam 1 and the precast concrete column 2, and adopting necessary temporary support to ensure the hoisting precision and stability;
installing a resetting piece, and fixing two ends of the resetting piece, which penetrate through the precast concrete beam 1 and the precast concrete column 2, with the precast concrete beam 1 and the precast concrete column 2 respectively;
and (3) installing the energy consumption piece, wherein one end of the energy consumption piece penetrates through the precast concrete column 2 and is detachably and fixedly connected with the precast concrete column 2, and the other end of the energy consumption piece is detachably and fixedly connected with the precast concrete beam 1.
After a major earthquake occurs, the replaceable energy consumption bolts 6 are disassembled, and new replaceable energy consumption bolts 6 are installed, so that the earthquake resistance of the structure is recovered.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (7)
1. The utility model provides an assembled bolted connection is from beam column node structure that resets which characterized in that: comprising the following steps:
the concrete beam is prefabricated and the concrete beam is arranged in the prefabricated concrete beam,
the concrete column is prefabricated,
one end of each positioning bolt penetrates through the precast concrete column and is detachably and fixedly connected with the precast concrete column, and the other end of each positioning bolt is detachably and fixedly connected with the middle part of the precast concrete beam;
the energy dissipation components penetrate through the precast concrete columns at one end and are detachably and fixedly connected with the precast concrete columns, the precast concrete beams can be detachably and fixedly connected at the other end, and at least one energy dissipation component is arranged at the top and the bottom of each precast concrete beam; and
the restoring pieces penetrate through the precast concrete beam and the precast concrete column, one end of each restoring piece is fixedly connected with one end of the precast concrete beam, which is far away from the precast concrete column, and the other end of each restoring piece is fixedly connected with one side of the precast concrete column, which is far away from the precast concrete beam.
2. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: the precast concrete beam is pre-buried to have a plurality of first steel pipes, precast concrete post pre-buried has a plurality of second steel pipes, first steel pipe with the second steel pipe corresponds the setting and communicates, one reset piece is used for passing one behind the pore in first steel pipe and the second steel pipe both ends respectively with precast concrete post with precast concrete beam fixed connection.
3. The fabricated bolted self-resetting beam-column node structure of claim 2, wherein: the reset piece is a prestressed rib and an anchorage device, two ends of the prestressed rib after penetrating through the pore canal in the first steel pipe and the second steel pipe are respectively fixedly connected with the precast concrete column and the precast concrete beam through the anchorage device, an unbonded micro-expansion material is filled between the prestressed rib in the first steel pipe and the first steel pipe, and an unbonded micro-expansion material is filled between the prestressed rib in the second steel pipe and the second steel pipe.
4. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: the precast concrete roof beam includes first roof beam body and second roof beam body, the cross-sectional dimension of first roof beam body is greater than the cross-sectional dimension of second roof beam body, just the central line of first roof beam body with the central line coincidence of second roof beam body, be higher than on the first roof beam body with be less than the part of second roof beam body is power consumption spare connecting portion, power consumption spare connecting portion are provided with a plurality of third steel pipes, precast concrete post pre-buried has a plurality of fourth steel pipes, the fourth steel pipe with the third steel pipe corresponds the setting and communicates, one power consumption spare pass one fourth steel pipe and one both ends behind the third steel pipe respectively with power consumption spare connecting portion with precast concrete post is fixed.
5. The fabricated bolted self-righting beam column node structure of claim 4, wherein: the energy consumption piece comprises an energy consumption bolt and a plurality of first fixing nuts, and two ends of the energy consumption bolt, which penetrate through one fourth steel pipe and one third steel pipe, are respectively and fixedly connected with the first fixing nuts through threads.
6. The fabricated bolted self-resetting beam-column node structure of claim 1, wherein: still include post pre-buried steel sheet and pre-buried steel sheet of roof beam, post pre-buried steel sheet fixed set up in precast concrete column keeps away from one side of precast concrete roof beam, the pre-buried steel sheet of roof beam fixed set up in precast concrete roof beam is close to one side of precast concrete column, post pre-buried steel sheet with all be provided with on the pre-buried steel sheet of roof beam be used for positioning bolt the power consumption piece with the through-hole that the piece passed resets.
7. The fabricated bolted self-righting beam column node structure of claim 6, wherein: the side wall frame comprises a precast concrete column and is characterized by further comprising a plurality of side wall frame shells and a plurality of second fixing nuts, wherein each side wall frame shell is fixedly connected with the middle part of one side of the precast concrete column away from the beam embedded steel plate, a groove for placing the side wall frame shells is formed in the precast concrete beam, the side wall frame shells are provided with operation openings, and the positioning bolts penetrate through the beam embedded steel plate and extend into the side wall frame shells to be fixedly connected with the second fixing nuts through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320705516.0U CN219732279U (en) | 2023-04-03 | 2023-04-03 | Assembled bolted connection is from restoring to throne beam column node structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320705516.0U CN219732279U (en) | 2023-04-03 | 2023-04-03 | Assembled bolted connection is from restoring to throne beam column node structure |
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| CN219732279U true CN219732279U (en) | 2023-09-22 |
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| CN202320705516.0U Active CN219732279U (en) | 2023-04-03 | 2023-04-03 | Assembled bolted connection is from restoring to throne beam column node structure |
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| Country | Link |
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| CN (1) | CN219732279U (en) |
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2023
- 2023-04-03 CN CN202320705516.0U patent/CN219732279U/en active Active
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