CN114753696A - Assembled is from restoring to throne concrete frame node based on modularization power consumption is connected - Google Patents
Assembled is from restoring to throne concrete frame node based on modularization power consumption is connected Download PDFInfo
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- CN114753696A CN114753696A CN202210406142.2A CN202210406142A CN114753696A CN 114753696 A CN114753696 A CN 114753696A CN 202210406142 A CN202210406142 A CN 202210406142A CN 114753696 A CN114753696 A CN 114753696A
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- 239000004567 concrete Substances 0.000 title claims abstract description 36
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 65
- 238000005265 energy consumption Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 54
- 239000010959 steel Substances 0.000 claims description 54
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 27
- 238000012546 transfer Methods 0.000 claims description 25
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 20
- 210000001503 joint Anatomy 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract 1
- 238000010008 shearing Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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Abstract
The invention relates to an assembled self-resetting concrete frame node based on modular energy consumption connection, which comprises a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, a column end pre-embedded connecting piece and a beam end pre-embedded connecting piece, wherein the beam end pre-embedded connecting piece comprises a beam end mounting plate which is perpendicular to the prefabricated reinforced concrete beam, the column end pre-embedded connecting piece comprises a column end mounting plate, a beam end vertical shear force transmission plate is arranged on the beam end mounting plate, a column end vertical shear force transmission plate which is matched with the beam end vertical shear force transmission plate is arranged on the column end mounting plate, the assembled self-resetting concrete frame node further comprises the modular energy consumption connecting piece, the left end of the modular energy consumption connecting piece is fixedly connected with the column end mounting plate through a left bolt, and the right end of the modular energy consumption connecting piece is fixedly connected with the beam end mounting plate through a right bolt. The invention solves the technical problem that the components are easily influenced mutually because the vertical load transmission path and the transverse load buffering path are mutually overlapped in the prior art.
Description
Technical Field
The invention relates to the field of fabricated buildings, in particular to a fabricated self-resetting concrete frame node based on module energy consumption connection.
Background
The prefabricated concrete structure in China mainly adopts an integral type of assembly, namely an equivalent cast-in-place theoretical mode. The seismic performance of the assembled integral structure is close to that of a cast-in-place structure, but the nodes still need to be cast in place, and the assembling degree is not high. The assembled self-resetting structure formed by splicing the prefabricated parts through the unbonded prestressed steel strands not only can realize building industrialization, but also has very small residual deformation of the structure after earthquake, and relatively small repair cost and indirect loss of the structure after the earthquake. The energy consumption performance of the fabricated self-resetting structure is weak, and an energy consumption device needs to be additionally arranged to improve the energy consumption capability of the structure.
In the damping technology, the passive energy dissipation device becomes a mature vibration control technology with wide application due to the advantages of simple structure, low manufacturing cost, easy maintenance and the like. The soft steel damper consumes energy by means of yielding of the soft steel, the yield load of the soft steel is low, the soft steel with a low yield point enters a yielding stage before the main body structure under an earthquake, the earthquake energy is dissipated by means of the good hysteresis characteristic of the soft steel in a plastic stage, and the safety of the main body structure is protected.
The existing self-resetting concrete frame node is the 'energy dissipation piece modularized assembly type self-resetting concrete frame low-damage node' disclosed in Chinese patent CN110847357B, and comprises a prefabricated reinforced concrete column prefabricated reinforced concrete beam, a column end embedded steel plate, a soft steel damper, a beam end embedded steel section steel jacket, an unbonded prestressed steel strand, a prestressed steel strand pore and a high-strength hinged hole bolt; one side of the column end embedded steel plate is provided with an anchoring end, the other side of the column end embedded steel plate is provided with a column end butt plate, the end web of the beam end embedded steel jacket is the beam end butt plate, the soft steel damper is connected with the column end butt plate and the beam end butt plate through high-strength hinged hole bolts, prestressed steel strand ducts are arranged in the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam, and the unbonded prestressed steel strands penetrate through the prestressed steel strand ducts to connect the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam.
The problem that low damage node of current this kind of assembled self-healing concrete frame exists lies in: when an earthquake occurs, vertical loads between the prefabricated reinforced concrete columns and the prefabricated reinforced concrete beams are transmitted through the beam end butt-joint plate and the column end butt-joint plate, the soft steel dampers fixed on the column end butt-joint plate and the beam end butt-joint plate are used for dissipating energy and damping shock, the vertical load transmission paths and the load transmission paths of the soft steel dampers are interwoven, the force transmission paths are not single, the stress mechanism of the components is complex, the component design is not facilitated, and the components are easily influenced with each other, so that potential risks are brought to the stress performance of the components; for example, when the column end butt plate is deformed and damaged by the vertical load, the energy consumption performance of the mild steel damper installed between the column end butt plate and the beam end butt plate is also affected; bolt holes are formed in the beam end butt joint plate and the column end butt joint plate and used for connection of the soft steel dampers, and certain influence can be caused on the strength of the beam end butt joint plate and the column end butt joint plate.
Disclosure of Invention
The invention aims to provide an assembly type self-resetting concrete frame node based on modular energy-consuming connection, and the assembly type self-resetting concrete frame node aims to solve the technical problems that components are easily influenced mutually and the stress mechanism and the design method are complex due to the fact that a vertical load transmission path and an energy-consuming connecting piece load transmission path are overlapped.
In order to solve the technical problem, the technical scheme of the assembly type self-resetting concrete frame node based on the modularized energy consumption connection is as follows:
an assembled self-resetting concrete frame joint based on modularized energy consumption connection comprises a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, a column end embedded connecting piece and a beam end embedded connecting piece, wherein the length of the prefabricated reinforced concrete beam extends along the left-right direction, the column end embedded connecting piece is fixed on the prefabricated reinforced concrete column, the beam end embedded connecting piece is fixed on the prefabricated reinforced concrete beam, the beam end embedded connecting piece also comprises a bonded prestressed steel strand connected between the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam along the extending direction of the prefabricated reinforced concrete beam, the beam end embedded connecting piece comprises a beam end mounting plate which is vertically arranged with the prefabricated reinforced concrete beam, the column end embedded connecting piece comprises a column end mounting plate which is arranged in parallel with the beam end mounting plate, a beam end vertical shear force transmission plate is arranged on the beam end mounting plate, a column end vertical shear force transmission plate matched with the beam end vertical shear force transmission plate is arranged on the column end mounting plate, the assembled shear force self-resetting concrete frame joint also comprises modularized energy consumption connecting pieces, the left end of the modularized energy-consuming connecting piece is fixedly connected with the column end mounting plate through a left bolt, and the right end of the modularized energy-consuming connecting piece is fixedly connected with the beam end mounting plate through a right bolt.
The beneficial effects of the invention are as follows: in the invention, when an earthquake occurs, vertical loads between the prefabricated reinforced concrete columns and the prefabricated reinforced concrete beams are transferred through the beam end vertical shear transfer plates and the column end vertical shear transfer plates; the modularized energy-consuming connecting piece between the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam is used for energy consumption and shock absorption; the modularized energy consumption connecting piece is independent of the beam end vertical shear transfer plate and the column end vertical shear transfer plate, a force transmission path is clear, influence among components is small, and holes do not need to be formed in the beam end vertical shear transfer plate and the column end vertical shear transfer plate, so that reliable transmission of vertical shear can be easily guaranteed; the modular design of the energy-consuming connecting piece in the assembled self-resetting concrete frame structure is well realized, namely, the energy-consuming connecting piece is replaced and upgraded under the condition of not occupying extra space, so that the assembled self-resetting concrete frame structure has good expandability.
The column end embedded connecting piece further comprises a side-span column end plate arranged on the left side of the column end mounting plate in parallel, the upper end and the lower end of the side-span column end plate are connected with the upper end and the lower end of the column end mounting plate through column end transverse plates, column end mounting plate bolt through holes are formed in the column end mounting plate, column end mounting plate nuts used for being connected with the left side bolts are welded and fixed on the column end mounting plate on the left side of the column end mounting plate bolt through holes, and the column end mounting plate nuts are connected with the corresponding column end transverse plates through column end force transmission plates.
The pre-buried connecting piece of beam-ends is still including setting firmly beam-ends roof and the beam-ends bottom plate at both ends about the beam-ends mounting panel, has seted up beam-ends mounting panel bolt on the beam-ends mounting panel and has perforated, on the beam-ends mounting panel in the fenestrate right side welded fastening of beam-ends mounting panel bolt be used for with the beam-ends mounting panel nut that the right side bolt links to each other, the beam-ends mounting panel nut passes through beam-ends biography power board and links to each other with beam-ends roof or beam-ends bottom plate.
The modularized energy dissipation connecting pieces comprise U-shaped soft steel energy dissipation connecting pieces and friction energy dissipation connecting pieces, 4 modularized energy dissipation connecting pieces can be connected between the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column, and the type selection and distribution of the modularized energy dissipation connecting pieces can be flexibly designed according to performance requirements; the left side plate and the right side plate of the modularized energy-consuming connecting piece are fixedly connected with the column end mounting plate and the beam end mounting plate through a left side bolt and a right side bolt respectively; the modularized energy dissipation connecting pieces, namely the U-shaped mild steel energy dissipation connecting pieces and the friction energy dissipation connecting pieces, are arranged up and down symmetrically and are symmetrically distributed on two sides of the vertical shear force transmission plate; the opening of the upper U-shaped mild steel energy-consumption connecting piece faces upwards, and the opening of the lower U-shaped mild steel energy-consumption connecting piece faces downwards;
The upper side friction energy-consuming connecting pieces comprise outer friction pieces and inner friction pieces in friction contact fit with the outer friction pieces in the left-right direction, the outer friction pieces are connected with the column end mounting plate through a left side plate of the friction energy-consuming connecting pieces, and the inner friction pieces are connected with the beam end mounting plate through a right side plate of the friction energy-consuming connecting pieces; the upper friction energy-consuming connecting piece and the lower friction energy-consuming connecting piece are arranged in a vertical symmetrical mode; the outer friction plate and the inner friction plate are provided with guide long holes extending along the left-right direction in the guide direction, and the friction energy consumption contact element comprises a friction plate fastening bolt arranged in the guide long holes in a penetrating mode and a friction plate fastening nut connected with the friction plate fastening bolt.
The butt joint surface of the beam end vertical shear transfer plate and the column end vertical shear transfer plate is an arc surface.
The prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are provided with prestressed steel strand pore canals, and the unbonded prestressed steel strand penetrates through the prestressed steel strand pore canals to connect the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to like or corresponding parts and in which:
Fig. 1 is a schematic structural diagram of an embodiment 1 of an assembled self-resetting concrete frame joint based on modular energy-consuming connections in the invention;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a schematic view of the structure of the embedded connector at the column end in FIG. 1
FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;
FIG. 5 is a schematic structural view of the beam-end embedded connector in FIG. 1;
FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;
FIG. 7 is a schematic structural view of the lower U-shaped mild steel energy-dissipating connector in FIG. 1;
fig. 8 is a schematic view showing the matching between the beam-end embedded connector and the column-end embedded connector in embodiment 1;
fig. 9 is a schematic view of the state of fig. 8 after the modular energy-consuming connecting pieces are connected between the beam-end embedded connecting pieces and the column-end embedded connecting pieces;
fig. 10 is a schematic view showing the combination of the beam-end embedded connectors, the column-end embedded connectors, and the corresponding steel frameworks in embodiment 1;
FIG. 11 is a schematic view of the structure of FIG. 10 from another perspective;
fig. 12 is a schematic diagram illustrating the matching of beam-end embedded connectors and column-end embedded connectors in embodiment 2 of the assembly type self-resetting concrete frame joint based on modular energy-consuming connection according to the present invention;
FIG. 13 is a schematic view of the underside friction dissipative connector of FIG. 12;
FIG. 14 is an exploded view of FIG. 13;
description of reference numerals: 1. prefabricating a reinforced concrete column; 2. prefabricating a reinforced concrete beam; 3. embedding a connecting piece at the column end; 4. pre-embedding a connecting piece at a beam end; 5. a column end mounting plate; 6. unbonded prestressed steel strands; 7. a left side bolt; 8-1, an upper U-shaped mild steel energy consumption connecting piece; 8-2, a lower side U-shaped mild steel energy consumption connecting piece; 9. a left side plate of the U-shaped mild steel energy consumption connecting piece; 10. a right side plate of the U-shaped mild steel energy consumption connecting piece; 11. a right side bolt; 12. a column end vertical shear transfer plate; 13. a beam-end vertical shear transfer plate; 14. the column end mounting plate is provided with a bolt through hole; 15. column end mounting plate nuts; 16. a column end dowel plate; 17. a column end anchoring plate; 18. a side span column end plate; 19. a column end transverse plate; 20. the column end is provided with a steel strand perforation; 21. beam-end shear keys; 22. a beam-end mounting plate; 23. mounting a plate nut at the beam end; 24. a beam-end dowel plate; 25. a beam-end roof; 26. a beam-end baseplate; 27. the beam end mounting plate is provided with a bolt through hole; 28. the beam end is provided with a steel strand perforation; 29. a butt joint surface; 30. a beam-end side plate; 31-1, an upper friction energy-consuming connecting piece; 31-2, a lower friction energy consumption connecting piece; 32. a left side plate of the friction energy-consumption connecting piece; 33. a right side plate of the friction energy-consumption connecting piece; 34. an inner friction plate; 35. a friction plate fastening bolt; 36. an outer friction plate; 37. the friction plate is fastened with a nut.
Detailed Description
In order to facilitate an understanding of the invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
An embodiment 1 of an assembled self-resetting concrete frame joint based on modular energy-consuming connection is shown in fig. 1-11:
including prefabricated reinforced concrete post 1 of vertical arrangement, length along the prefabricated reinforced concrete beam 2 of controlling the direction extension, pour into overall structure's post end embedded connector 3 with prefabricated reinforced concrete post and pour into overall structure's beam-ends embedded connector 4 with prefabricated reinforced concrete beam.
The column end embedded connecting piece 3 comprises a column end mounting plate 5 and a side span column end plate 18 arranged on the left side of the column end mounting plate in parallel, and the upper end and the lower end of the side span column end plate 18 are connected with the upper end and the lower end of the column end mounting plate 5 through a column end transverse plate 19. The side span column end plate 18 and the column end mounting plate 5 are positioned at the left side and the right side of the reinforcement cage of the prefabricated reinforced concrete column.
The column end mounting plate is provided with column end mounting plate bolt through holes 14, column end mounting plate nuts 15 are fixedly welded on the column end mounting plate on the left sides of the column end mounting plate bolt through holes, and the column end mounting plate nuts 15 are connected with corresponding column end transverse plates 19 through column end force transfer plates 16. The left side of column end mounting panel 5 still welded fastening has the column end anchor board 17 that is used for improving with concrete joint strength, and column end anchor board 17 is the cross plate structure.
Beam-ends embedded connector 4 is including setting up in beam-ends mounting panel 22 on column-ends mounting panel 5 right side by side, beam-ends embedded connector is still including setting firmly beam-ends roof 25 and the beam-ends bottom plate 26 at both ends about the beam-ends mounting panel, set up beam-ends mounting panel bolt perforation 27 on the beam-ends mounting panel 22, it has beam-ends mounting panel nut 23 to have welded fastening in the fenestrate right side of beam-ends mounting panel bolt on the beam-ends mounting panel, beam-ends mounting panel nut 23 passes through beam-ends dowel plate 24 and links to each other with beam-ends roof or beam-ends bottom plate.
The left and right sides of beam-ends bottom plate and beam-ends roof are provided with beam-ends curb plate 30, and beam-ends bottom plate, beam-ends roof and beam-ends curb plate form the steel bushing structure. Be fixed with the vertical shear force transfer plate of beam-ends 13 on the beam-ends mounting panel, the upper and lower both sides of the vertical shear force board of beam-ends sets firmly together with beam-ends roof and beam-ends bottom plate, and the part of the vertical shear force board of beam-ends in the cylinder liner is provided with beam-ends shear key 21 to can effectual transmission vertical shear force between the web of the pre-buried connecting piece of beam-ends and the precast concrete beam. The left end of the beam-end vertical shear plate is provided with a slot, the column-end mounting plate 5 is provided with a column-end vertical shear transfer plate 12 matched with the slot, and the butt joint surface 29 of the beam-end vertical shear transfer plate 13 and the column-end vertical shear transfer plate 12 is an arc surface. The butt joint surface is a contact surface between the upper end surface of the column end vertical shear transfer plate and the upper side groove wall of the slot and a contact surface between the lower end surface of the column end vertical shear transfer plate and the lower side groove wall of the slot.
The assembled self-resetting concrete frame node further comprises a modular energy-consuming connecting piece, the left end of the modular energy-consuming connecting piece is fixedly connected with the column-end mounting plate 5 through a left bolt 7, and the right end of the modular energy-consuming connecting piece is fixedly connected with the beam-end mounting plate 22 through a right bolt 11. The left side bolt passes through the column end mounting plate bolt hole and then is connected with the column end mounting plate nut, and the right side bolt passes through the beam end mounting plate bolt hole and then is connected with the beam end mounting plate nut.
The assembly type self-resetting concrete frame node further comprises unbonded prestressed steel strands 6 connected between the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam along the extending direction of the prefabricated reinforced concrete beam, the unbonded prestressed steel strands mean that the prestressed steel strands are not adhered to corresponding concrete, prestressed steel strand channels are arranged in the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam, and the unbonded prestressed steel strands penetrate through the prestressed steel strand channels to connect the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam.
The column end mounting plate is provided with column end mounting plate steel strand through holes 20 for the unbonded prestressed steel strands to pass through, and the beam end mounting plate is provided with beam end mounting plate steel strand through holes 28 for the unbonded prestressed steel strands to pass through. The unbonded prestressed steel strands are distributed on two sides of the column end vertical shear transfer plate and the beam end vertical shear transfer plate.
In this embodiment, the modular energy dissipation connecting pieces comprise 2 upper U-shaped mild steel energy dissipation connecting pieces 8-1 and 2 lower U-shaped mild steel energy dissipation connecting pieces 8-2, which are symmetrically distributed on two sides of the vertical shear transfer plate; and a left side plate 9 and a right side plate 10 of the U-shaped mild steel energy-consuming connecting piece are fixedly connected with the column end mounting plate and the beam end mounting plate through a left side bolt 7 and a right side bolt 11 respectively. The opening of upside U-shaped mild steel power consumption connecting piece is up, and the opening of downside U-shaped mild steel power consumption connecting piece is down. The unbonded prestressed steel strand is positioned between the upper U-shaped soft steel energy consumption connecting piece and the lower metal damper.
In the invention, the column end embedded connecting piece mainly bears the vertical shearing force transmitted by the prefabricated reinforced concrete beam through the butt joint surface, transmits the bending moment through the modularized energy consumption connecting piece and applies pressure to the beam end embedded connecting piece under the action of the prestressed steel strands. After the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are hoisted in place, the modularized energy-consuming connecting piece is installed, and an unbonded prestressed steel strand is penetrated and prestressed.
In the invention, the self-resetting function is mainly realized by the unbonded prestressed steel strands in the prefabricated reinforced concrete columns and the prefabricated reinforced concrete beams. The vertical shearing force of the beam end is mainly transmitted by the arc butt joint surface between the column end vertical shearing force transmission plate and the beam end vertical shearing force transmission plate, and the reliable transmission of the vertical shearing force can be realized when the prefabricated reinforced concrete beam rotates around the node. When the earthquake action reaches a certain degree, the contact surface of the beam column is opened, and after the earthquake action, the beam column member is reset to the original position under the action of the unbonded prestressed steel strands.
According to the invention, the modularized energy consumption connecting pieces are arranged on two sides of the vertical shear force transfer plate and are fastened through bolts. According to the modularized design concept, the energy consumption connection can be flexibly arranged according to actual requirements, and the energy consumption capacity can be adjusted by changing the size and the shape of the modularized energy consumption connecting piece. The modularized energy-consuming connecting piece can reduce the earthquake damage and protect the main stressed member by utilizing the energy-consuming capacity of the modularized energy-consuming connecting piece, and can also increase the lateral rigidity of the structure and reduce the interlayer displacement of the structure under the action of an earthquake.
In the invention, the load of the modularized energy-consuming connection is transmitted through the nuts welded on the column-end embedded connecting piece and the beam-end embedded connecting piece, the nut transmits acting force to the main body frame of the corresponding embedded connecting piece through the force transmission plate, the beam-end vertical shearing force is transmitted through the column-end vertical shearing force transmission plate and the beam-end vertical shearing force transmission plate, the force transmission paths of the energy-consuming connection and the beam-end vertical shearing force are mutually independent, the stress mechanism is relatively clear, the component design is easy, and the robustness is better.
The technical scheme of the invention has the following excellent performances.
1) All components can be prefabricated in a factory, on-site wet operation is not needed, the quality of the components is guaranteed, labor cost and environmental pollution are reduced, and construction progress is accelerated;
2) by adopting the prestressing technology based on the unbonded steel stranded wire, the initial rigidity of the node is high, the self-resetting capability is realized, the residual deformation of the structure is greatly reduced, the prefabricated reinforced concrete beam column member basically keeps an elastic state, and the energy-consuming connecting piece is convenient to install and easy to replace and provides convenience for repairing after an earthquake;
3) the butt joint surface of the precast concrete beam column component is an arc surface which accords with the actual motion trail of the component, and the reliable transmission of the vertical shearing force of the beam end can be ensured when the node is deformed greatly;
4) The modularized energy-consuming connection not only facilitates replacement of the energy-consuming connecting piece, but also can be designed and arranged based on actual requirements of the structure, and the expandability of the energy-consuming connection brings more potential lifting spaces for the anti-seismic performance and the function recoverability of the assembly type self-resetting concrete frame structure; the modularization power consumption is connected and is arranged within the outer contour line of precast beam column member, does not occupy extra space, does not influence the arrangement of adjacent component and equipment.
5) The beam-end embedded connecting piece and the column-end embedded connecting piece are integrated design of a self-reset module, a prefabricated assembly module and an energy consumption module, have the characteristics of low damage of a prefabricated beam-column member, small residual deformation of a node, function restorability, expandable energy consumption connection and the like, remarkably improve the anti-seismic toughness of a structure, and greatly reduce the maintenance cost after an earthquake.
An embodiment 2 of an assembled self-resetting concrete frame joint based on modular energy-consuming connections is shown in fig. 12-14: embodiment 2 is different from embodiment 1 in that, in this embodiment, the modular energy dissipation connecting pieces include an upper side friction energy dissipation connecting piece 31-1 and a lower side friction energy dissipation connecting piece 31-2 which are arranged up and down, each friction energy dissipation connecting piece includes an outer friction plate 36 and an inner friction plate 34 which is in friction contact fit with the outer friction plate in the left and right direction, the outer friction plate 36 is in a sandwich plate structure, the inner friction plate 34 is located in a sandwich layer of the sandwich plate structure, the upper and lower end faces of the inner friction plate are used for being in contact friction fit with the outer friction plate, the outer friction plate is connected with the column end mounting plate through a left side plate 32 of the friction energy dissipation connecting piece, and the inner friction plate is connected with the beam end mounting plate through a right side plate 33 of the friction energy dissipation connecting piece.
The upper friction energy-consuming connecting piece and the lower friction energy-consuming connecting piece are symmetrically arranged up and down.
The outer friction plate and the inner friction plate are provided with guide long holes extending along the left-right direction in the right guide direction, and the friction energy consumption contact element comprises a friction plate fastening bolt 35 arranged in the guide long holes in a penetrating mode and a friction plate fastening nut 37 connected with the friction plate fastening bolt. The friction force between the inner friction plate and the outer friction plate is adjusted by adjusting the tightness of the fastening bolt of the friction plate, so that the energy consumption capacity of the friction plate is changed.
In other embodiments of the present invention, the friction energy-consuming connecting member and the U-shaped mild steel energy-consuming connecting member may also be used in combination, for example, the U-shaped mild steel energy-consuming connecting member is used on one side of the beam-end vertical shear transfer plate, and the friction energy-consuming connecting member is used on the other side of the beam-end vertical shear transfer plate; or both friction energy dissipating connecting pieces and U-shaped mild steel energy dissipating connecting pieces are used on one side.
In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
From the above description of the present specification, those skilled in the art will also understand the terms used, terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "central", "longitudinal", "transverse", "clockwise" or "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings of the present specification, it is for the purpose of facilitating the explanation of the invention and simplifying the description, and it is not intended to state or imply that the devices or elements involved must be in the particular orientation described, constructed and operated, therefore, the above terms of orientation or positional relationship should not be construed or interpreted as limiting the present invention.
In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an assembled is from restoring to throne concrete frame node based on modularization power consumption is connected, includes prefabricated reinforced concrete post, prefabricated reinforced concrete roof beam, is fixed in the pre-buried connecting piece of post end on the prefabricated reinforced concrete post and is fixed in the pre-buried connecting piece of beam-ends on the prefabricated reinforced concrete roof beam, still includes along prefabricated reinforced concrete roof beam extending direction connect the unbonded prestress wire between prefabricated reinforced concrete post and prefabricated reinforced concrete roof beam, its characterized in that: beam-ends embedded connector includes the beam-ends mounting panel that sets up with the precast reinforced concrete roof beam is perpendicular, column-ends embedded connector includes the column end mounting panel that arranges side by side with the beam-ends mounting panel, be provided with the vertical shear force transmission board of beam-ends on the beam-ends mounting panel, be provided with the vertical shear force transmission board of column-ends with the vertical shear force transmission board complex of beam-ends on the column-ends mounting panel, the assembled still includes modularization power consumption connecting piece from restoring to the throne concrete frame node, the left end of modularization power consumption connecting piece passes through the left side bolt and links to each other with the column-ends mounting panel is fixed, the right-hand member of modularization power consumption connecting piece passes through the right side bolt and links to each other with the beam-ends mounting panel is fixed.
2. The fabricated self-restoring concrete frame joint according to claim 1, wherein: the column end embedded connecting piece further comprises a side-span column end plate arranged on the left side of the column end mounting plate in parallel, the upper end and the lower end of the side-span column end plate are connected with the upper end and the lower end of the column end mounting plate through column end transverse plates, column end mounting plate bolt through holes are formed in the column end mounting plate, column end mounting plate nuts used for being connected with the left side bolts are welded and fixed on the column end mounting plate on the left side of the column end mounting plate bolt through holes, and the column end mounting plate nuts are connected with the corresponding column end transverse plates through column end force transmission plates.
3. The fabricated self-restoring concrete frame joint according to claim 1, wherein: the pre-buried connecting piece of beam-ends is still including setting firmly beam-ends roof and the beam-ends bottom plate at both ends about the beam-ends mounting panel, has seted up beam-ends mounting panel bolt on the beam-ends mounting panel and has perforated, on the beam-ends mounting panel in the fenestrate right side welded fastening of beam-ends mounting panel bolt be used for with the beam-ends mounting panel nut that the right side bolt links to each other, the beam-ends mounting panel nut passes through beam-ends biography power board and links to each other with beam-ends roof or beam-ends bottom plate.
4. The fabricated self-restoring concrete frame joint according to claim 1, wherein: the modularized energy dissipation connecting pieces comprise U-shaped soft steel energy dissipation connecting pieces and friction energy dissipation connecting pieces, 4 modularized energy dissipation connecting pieces can be connected between the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column, and the type selection and distribution of the modularized energy dissipation connecting pieces can be flexibly designed according to performance requirements; and the left side plate and the right side plate of the modularized energy-consuming connecting piece are fixedly connected with the column end mounting plate and the beam end mounting plate through a left side bolt and a right side bolt respectively.
5. The fabricated self-resetting concrete frame node of claim 4, wherein: the modularized energy dissipation connecting pieces, namely the U-shaped mild steel energy dissipation connecting pieces and the friction energy dissipation connecting pieces, are arranged in an up-down symmetrical mode and are symmetrically distributed on two sides of the vertical shear force transmission plate.
6. The fabricated self-restoring concrete frame node of claim 4, wherein: the opening of the upper U-shaped mild steel energy-consumption connecting piece faces upwards, and the opening of the lower U-shaped mild steel energy-consumption connecting piece faces downwards.
7. The fabricated self-restoring concrete frame node of claim 4, wherein: the upper friction energy-consumption connecting pieces comprise outer friction pieces and inner friction pieces in friction contact fit with the outer friction pieces in the left-right direction, the outer friction pieces are connected with the column end mounting plate through the left side plate of the friction energy-consumption connecting pieces, and the inner friction pieces are connected with the beam end mounting plate through the right side plate of the friction energy-consumption connecting pieces.
8. The fabricated self-restoring concrete frame node of claim 7, wherein: the outer friction plate and the inner friction plate are provided with guide long holes extending along the left-right direction in the guide direction, and the friction energy consumption contact element comprises a friction plate fastening bolt and a friction plate fastening nut, wherein the friction plate fastening bolt is arranged in the guide long holes in a penetrating mode, and the friction plate fastening nut is connected with the friction plate fastening bolt.
9. The fabricated self-restoring concrete frame joint according to claim 1, wherein: the butt joint surface of the beam end vertical shear transfer plate and the column end vertical shear transfer plate is an arc surface.
10. The fabricated self-resetting concrete frame joint according to any one of claims 1 to 10, wherein: the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are provided with prestressed steel strand pore canals, and the unbonded prestressed steel strand penetrates through the prestressed steel strand pore canals to connect the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam.
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| CN107119799A (en) * | 2017-05-12 | 2017-09-01 | 东南大学 | The prestressing force assembling type node construction and its construction method of beam-ends friction energy-dissipating |
| CN110847357A (en) * | 2019-11-28 | 2020-02-28 | 东南大学 | Energy dissipation spare modular assembled is from low damage node of restoring to throne concrete frame |
| CN212613023U (en) * | 2020-04-24 | 2021-02-26 | 江南大学 | Double-arch steel frame beam column node reinforcing device with grading energy consumption function |
| CN113047429A (en) * | 2021-03-02 | 2021-06-29 | 青岛理工大学 | Rotation friction energy dissipation type self-resetting assembly type beam-column joint |
| CN113529946A (en) * | 2021-08-24 | 2021-10-22 | 西安建筑科技大学 | Beam column energy consumption connecting piece based on U-shaped plate and construction method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119799A (en) * | 2017-05-12 | 2017-09-01 | 东南大学 | The prestressing force assembling type node construction and its construction method of beam-ends friction energy-dissipating |
| CN110847357A (en) * | 2019-11-28 | 2020-02-28 | 东南大学 | Energy dissipation spare modular assembled is from low damage node of restoring to throne concrete frame |
| CN212613023U (en) * | 2020-04-24 | 2021-02-26 | 江南大学 | Double-arch steel frame beam column node reinforcing device with grading energy consumption function |
| CN113047429A (en) * | 2021-03-02 | 2021-06-29 | 青岛理工大学 | Rotation friction energy dissipation type self-resetting assembly type beam-column joint |
| CN113529946A (en) * | 2021-08-24 | 2021-10-22 | 西安建筑科技大学 | Beam column energy consumption connecting piece based on U-shaped plate and construction method thereof |
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