CN113216436B - Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device - Google Patents
Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device Download PDFInfo
- Publication number
- CN113216436B CN113216436B CN202110526954.6A CN202110526954A CN113216436B CN 113216436 B CN113216436 B CN 113216436B CN 202110526954 A CN202110526954 A CN 202110526954A CN 113216436 B CN113216436 B CN 113216436B
- Authority
- CN
- China
- Prior art keywords
- steel
- column
- supporting
- plate
- connecting piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- 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
-
- 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
-
- 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
- E04H9/024—Structures with steel columns and beams
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2466—Details of the elongated load-supporting parts
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a supporting connecting piece at a joint of a steel supporting beam column, which belongs to the technical field of steel structures with recoverable functions, wherein the supporting connecting piece is provided with column end strip holes and beam end strip holes which are arranged in pairs, the column end strip holes are connected to a steel column through column end strip holes in a bolt manner, the upper flange of a steel beam is provided with a steel beam strip hole, the steel beam strip hole is connected with the beam end strip holes through bolts, SMA wires are connected between bolts in each pair of beam end strip holes, and meanwhile, a steel support is hinged on the supporting connecting piece; the SMA wires provide the steel beam resetting capability, and the supporting connecting pieces provide the steel beam rotation energy consumption capability, so that the steel beam has enough ductility and rotation capability; the self-resetting SMA device at the node of the steel supporting beam column adopts the supporting connecting piece, the lower flange of the steel column is fixedly connected with the lower flange of the steel beam, the steel beam can rotate around the connecting point of the steel beam and the steel column, the purposes of strong energy consumption and strong resetting are realized through the self-resetting SMA device, and the structure residual deformation risk and the influence of the node opening and closing effect are reduced.
Description
Technical Field
The invention relates to the technical field of steel structures with recoverable functions, in particular to a supporting connecting piece at a steel supporting beam column joint and a self-resetting SMA device.
Background
Steel frame structures are common structural forms in multi-story and high-rise buildings, in which beam-column joints are the basic units of the steel frame structure. The beam column node in the steel frame structure needs to transmit axial force, shearing force and bending moment, the force transmission mechanism is very complex, and the beam column node serving as the force transmission node in the steel frame structure is very easy to deform when encountering earthquake to influence the use safety and the service life of a building. Therefore, the seismic capacity of the beam-column node becomes crucial, at present, in order to improve the seismic capacity and the service life of a building, a recoverable functional structure is arranged at the beam-column node, and when the recoverable functional structure is subjected to earthquake action, a self-resetting mechanism can be utilized to reduce the residual deformation of a structural member caused by yielding energy consumption, so that the recoverable functional capacity of the structure is effectively improved, the building can still be used after the earthquake, and the service life of the building is ensured. For example, in the patent of the invention with the patent number of '201810346633.6', the name of 'self-resetting beam-column joint and steel structure building based on SMA rods', a connecting plate is arranged between a steel column and a steel beam, one end of the connecting plate is fixedly connected with the steel column, the other end of the connecting plate is connected with a web plate bolt of the steel beam, a space for the steel beam to rotate around the bolt on the web plate is reserved between the steel beam and the steel column, one end of the SMA rods is connected with the steel column, the other end of the SMA rods is fixedly connected with the steel beam, and the SMA rods are arranged in a vertical symmetry mode relative to the bolts on the web plate of the steel beam. When an earthquake happens, the steel beam can rotate around the bolt and dissipate earthquake energy, and then the steel beam can be restored to the original position for continuous use through the self-restoring capacity of the SMA bar after the earthquake happens.
However, in the existing self-resetting steel frame structure or the invention patent, only the self-resetting connecting node of the steel beam and the steel column is usually researched, and the research on the performance of the self-resetting beam-column node with rigid support is less, so that the existing recoverable function structure is not suitable for the beam-column node with steel support. Especially in the eccentric supporting structure, the residual deformation of the structure after the earthquake is large, the self-resetting and energy consumption capabilities of the structure need to be further increased, and the residual deformation of the structure needs to be reduced. Meanwhile, the connecting joint area of the steel beam, the steel column and the steel support in the eccentric support structure can form strong rigidity constraint, and the opening and closing effect is easily generated under the combined action of the axial force, the shearing force and the bending moment, so that the connecting part is damaged or destroyed before the beam, the column and the support yield, and therefore the connecting part needs to have enough ductility and rotation capacity to solve the influence of the opening and closing effect.
Disclosure of Invention
The invention aims to solve the technical problems and provides a supporting connecting piece at a steel supporting beam-column joint and a self-resetting SMA device, the aim of rotating energy consumption of a steel beam is fulfilled by low friction slippage energy consumption brought by the supporting connecting piece, and meanwhile, the steel beam is pulled by an SMA wire to provide strong energy consumption and strong resetting capability so as to solve the problems of large residual deformation, weak energy consumption capability, obvious opening and closing effect, poor resetting capability and the like of the steel column-steel beam-steel supporting connecting joint in the background technology.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a supporting and connecting piece at a steel supporting beam-column node, which is used for connecting a steel column, a steel beam and a steel support, wherein the supporting and connecting piece is provided with column-end long holes arranged along the height direction of the steel column and beam-end long holes arranged in pairs along the length direction of the steel beam, and the supporting and connecting piece is connected to the steel column through the column-end long holes by bolts; the upper flange of the steel beam is provided with a steel beam long hole corresponding to the beam end long hole, and the steel beam long hole is connected with the beam end long hole through a bolt; an SMA wire which can always pull the steel beam and can reset the steel beam is connected between the bolts in each pair of the long strip holes at the beam ends; the steel support is hinged on the support connecting piece.
Preferably, the supporting connecting piece comprises a supporting connecting vertical plate and a supporting connecting transverse plate which are connected with each other, and a supporting connecting end plate is connected between the supporting connecting vertical plate and the supporting connecting transverse plate; the steel column supporting and connecting device is characterized in that two rows of column end strip holes arranged in the height direction of the steel column are formed in the supporting and connecting vertical plate, two rows of beam end strip holes arranged in the length direction of the steel beam are formed in the supporting and connecting transverse plate, and hinge holes for the steel support to be rotatably connected are formed in the supporting and connecting end plate.
Preferably, the two rows of column end elongated holes and the two rows of beam end elongated holes are respectively formed in two sides of the support connection end plate.
Preferably, the end of the steel support is provided with two connecting lug plates, and the support connecting end plate is inserted between the two connecting lug plates and is connected with the connecting lug plates through the hinge holes and the pin shafts.
Preferably, a column end rubber gasket is arranged between the steel column and the support connecting vertical plate, a beam end rubber gasket is arranged between the upper flange of the steel beam and the support connecting transverse plate, and gasket strip holes corresponding to the column end strip hole and the beam end strip hole are respectively arranged on the column end rubber gasket and the beam end rubber gasket.
The invention also provides a self-resetting SMA device at the node of the steel support beam column, which applies the support connecting piece, wherein the support connecting piece is arranged between the upper flanges of the steel column and the steel beam, the steel support is hinged on the support connecting piece, and the steel column is fixedly connected with the lower flange of the steel beam.
Preferably, the steel column is connected with the lower flange of the steel beam through a T-shaped connecting piece, the T-shaped connecting piece comprises a column end connecting vertical plate and a beam end connecting transverse plate which are connected with each other, the column end connecting vertical plate is connected with the steel column through bolts, and the beam end connecting transverse plate is connected with the lower flange of the steel beam through bolts.
Preferably, an angle steel connecting piece is arranged between the steel column and the web plate of the steel beam, and comprises an angle steel column end connecting plate and an angle steel beam end connecting plate which are connected with each other; the steel beam comprises a steel column and is characterized in that a web plate of the steel beam is provided with a plurality of arc-shaped holes, arc-shaped bolts connected with the angle steel beam end connecting plate through bolts are arranged in the arc-shaped holes, and the angle steel column end connecting plate is connected with the steel column through bolts.
Preferably, the rotating centroids of the arc-shaped holes are the central points of the joints of the T-shaped connecting pieces and the steel columns.
Preferably, the steel column is H-shaped steel, and the web plate of the steel column is provided with an in-column stiffening rib which is on the same horizontal plane with the upper flange and the lower flange of the steel beam.
Compared with the prior art, the invention has the following technical effects:
1. the supporting and connecting piece is applied to the node of a steel beam and a steel column in a steel frame structure with a support, the supporting and connecting piece is connected with a steel column bolt through a column end strip hole, the supporting and connecting piece is connected with the steel column bolt through a beam end strip hole and the steel beam strip hole bolt on the steel beam, when the earthquake occurs, the supporting and connecting piece can slide along the vertical low friction of the steel column, meanwhile, due to the existence of the bolt, the supporting and connecting piece cannot move in the horizontal direction, but can move along the horizontal direction, the horizontal low friction sliding occurs between the supporting and connecting piece, under the action of the vertical low friction sliding and the horizontal friction sliding, the rotation of the steel beam towards the steel column is realized on the one hand, the steel beam can buffer the hard impact brought by the earthquake, and on the other hand, the energy consumption of the earthquake energy can be realized through the friction. The SMA wires are arranged between bolt ends in the long strip holes of the beam ends, when the steel beam rotates, the SMA wires are always in a tension state, the steel beam is pulled to provide elastic pulling, on one hand, the tensile state of the SMA wires can dissipate seismic energy and provide the resetting capacity of the steel beam, on the other hand, the steel beam can have enough ductility and rotating capacity, the damage or damage to the beam, the column and the support before yielding is avoided, the residual deformation risk of the structure is reduced, and the influence of the opening and closing effect of the steel column and the node of the steel beam is solved.
2. The end of steel shotcrete is equipped with two and connects the otic placode, and the steel shotcrete is articulated through connecting the otic placode and supporting connection spare, improves steel shotcrete and supporting connection spare joint strength on the one hand, and on the other hand two connect the otic placode with including the support connection end plate centre gripping in the supporting connection spare, can lead supporting connection spare, avoid supporting connection spare to rock to both sides, and the vertical that can not be smooth and easy slides.
3. The column end rubber gasket and the beam end rubber gasket are arranged between the supporting and connecting piece and the steel column and between the supporting and connecting piece and the steel beam respectively, the elasticity and friction resistance of rubber are utilized, the buffering effect is achieved, the damage caused by rigid impact among the steel column, the steel beam and the supporting and connecting piece when the earthquake occurs is reduced, meanwhile, the friction force among the steel column, the steel beam and the supporting and connecting piece is improved, and the earthquake energy consumption capacity is improved.
4. The self-resetting SMA device adopts a supporting connecting piece, is arranged between the upper flanges of the steel column and the steel beam, and simultaneously fixedly connects the lower flanges of the steel column and the steel beam. When the earthquake occurs, the steel beam rotates around the central point of the steel beam connected with the steel column, the supporting connecting piece generates vertical low-friction sliding energy consumption, the steel beam and the supporting piece connecting piece generate relative horizontal low-friction sliding energy consumption, the SMA wire pulls the steel beam to provide energy consumption and resetting capability, so that the opening and closing effect of the node under complex load is reduced, the damage of the node is reduced, and the high-ductility and high-efficiency resetting capability is realized.
5. The bottom flanges of the steel column and the steel beam are connected through the T-shaped connecting piece, so that the strength of the steel column and the steel beam rotating point is improved, and the steel beam and the steel column are prevented from being damaged due to repeated rotation.
6. Set up angle steel connecting piece between the web of steel column and girder steel and further improve the stability of being connected between steel column and the girder steel. Simultaneously, the steel beam web plate is provided with an arc-shaped hole, the steel beam is connected with the angle steel connecting piece through the arc-shaped hole and the arc-shaped bolt, on one hand, the arc-shaped hole does not influence the rotation of the steel beam, on the other hand, the arc-shaped bolt can dissipate seismic energy when moving in the arc-shaped hole, and further improves the energy consumption strength, reduces the risk of residual deformation and reduces the influence of the opening and closing effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used 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 invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a self-resetting SMA device;
FIG. 2 is a schematic structural view of a support link;
FIG. 3 is a side view of the support link;
FIG. 4 is a schematic structural view of an angle steel connecting piece;
FIG. 5 is a schematic view of a steel beam;
FIG. 6 is a schematic structural view of a T-shaped connector;
fig. 7 is a top view of a self-resetting SMA device.
Description of the reference numerals: 1. a steel column; 2. a steel beam; 3. supporting steel; 4. a support link; 5. a T-shaped connector; 6. an angle steel connecting piece; 7. SMA wires; 8. an in-column stiffener; 9. a nut; 10. a common gasket; 11. a long round hole gasket; 211. a steel beam long hole; 212. an arc-shaped hole; 213. an arc bolt; 214. a steel beam bolt hole; 311. connecting the ear plates; 312. a pin shaft; 411. a support connecting vertical plate; 412. supporting and connecting the transverse plates; 413. supporting and connecting the end plate; 414. a column end elongated hole; 415. a beam-end elongated hole; 416. a hinge hole; 417. a vertical sliding bolt; 418. horizontally sliding the bolt; 419. a column end rubber gasket; 420. a beam-end rubber gasket; 511. the column end is connected with a vertical plate; 512. the beam end is connected with the transverse plate; 513. a column end circular hole; 514. a beam-end circular hole; 611. a connecting plate at the end of the angle steel column; 612. an angle beam end connecting plate; 613. round holes at the ends of the angle steel columns; 614. round holes at the ends of the angle steel beams; 615. a center point.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present embodiment provides a supporting connection member at a node of a steel supporting beam column, which is used for connecting a steel column 1, a steel beam 2 and a steel support 3, as shown in fig. 1 to 7, a column end elongated hole 414 is disposed on a connection surface of a supporting connection member 4 connected to the steel column 1, the column end elongated hole 414 is disposed along a height direction of the steel column 1, and after a vertical sliding bolt 417 passes through the column end elongated hole 414 and a bolt hole on the steel column 1, nuts 9 are installed at two ends of the column end elongated hole 414, so as to bolt the supporting connection member 4 on the steel column 1. The connection surface of the supporting connection member 4 and the steel beam 2 is provided with beam end elongated holes 415, the beam end elongated holes 415 are arranged in pairs along the length direction of the steel beam 2, the upper flange of the steel beam 2 is provided with steel beam elongated holes 211, the number and the size of the steel beam elongated holes 211 are the same as those of the beam end elongated holes 415, after the beam end elongated holes 415 and the steel beam elongated holes 211 are in one-to-one correspondence, horizontal sliding bolts 418 are inserted, two nuts 9 are respectively arranged at the two ends of the horizontal sliding bolt 418, an SMA wire 7 is arranged between the horizontal sliding bolts 418 in each pair of beam end strip holes 415, the SMA wire 7 is wound between the two nuts 9 at the ends of the horizontal sliding bolts 418 and is clamped by the two nuts 9, after the SMA wire 7 is wound, the SMA wire 7 tightens the two horizontal sliding bolts 418, so that the horizontal sliding bolts 418 are tightly attached to the opposite ends of the two beam end elongated holes 415 and the opposite ends of the two steel beam elongated holes 211; the steel support 3 is hinged on the support connecting piece 4. During the earthquake, girder steel 2 can rotate towards steel column 1, and when girder steel 2 rotated downwards, support connection 4 can take place vertical low friction along steel column 1 and slide the power consumption, because vertical slip bolt 417's spacing, support connection 4 is kept motionless at the horizontal direction this moment. The steel beam 2 horizontally slides along the length direction of the steel beam 2, and the low-friction sliding in the horizontal direction is generated between the steel beam 2 and the supporting connecting piece 4 to consume energy, because the horizontal sliding screw 34 close to the steel column 1 in each pair of horizontal sliding screws 34 is close to the ends of the beam end strip hole 415 and the steel beam strip hole 211, the horizontal sliding screw 34 close to the side of the steel column 1 is fixed, and the horizontal sliding screw 34 far from the side of the steel column 1 slides in the direction far from the steel column 1 together under the pushing of the steel beam 2, so that the SMA wires 7 between the horizontal sliding screws 34 are pulled to provide the reset pulling force for the steel beam 2. When the steel beam 2 rotates upwards, the horizontal sliding screw 34 far away from one side of the steel column 1 is not moved, the horizontal sliding screw 34 close to one side of the steel column 1 moves towards the steel column 1 under the pushing of the steel beam 2, the SMA wire 7 is pulled, and the steel beam 2 is pulled back, namely, the SMA wire 7 is ensured to be pulled all the time under the combined action of the paired beam end strip holes 415 and the paired steel beam strip holes 211.
In this embodiment, as shown in fig. 1 to 7, the supporting connecting member 4 includes a supporting connecting vertical plate 411, a supporting connecting horizontal plate 412 and a supporting connecting end plate 413, the end of the supporting connecting horizontal plate 412 is vertically connected to the bottom of the supporting connecting vertical plate 411, the side wall of the supporting connecting end plate 413 is connected to the supporting connecting vertical plate 411, the bottom surface of the supporting connecting end plate 413 is fixedly connected to the supporting connecting horizontal plate 412, the connecting manner can be selected for welding, and the supporting connecting plate 413 and the supporting connecting horizontal plate 412 can be integrally formed. Be equipped with two rows of column end rectangular holes 414 on supporting connection riser 411, column end rectangular hole 414 all arranges along the direction of height of steel column 1 to guarantee that supporting connection 4 can slide from top to bottom along the direction of height of steel column 1, then will support connection riser 411 bolted connection on steel column 1 through column end rectangular hole 414 and vertical slip bolt 417. The supporting and connecting transverse plate 412 is provided with two rows of beam end strip holes 415 arranged along the length direction of the steel beam 2, and after the horizontal sliding bolts 418 are inserted into the beam end strip holes 415 and the steel beam strip holes 211, the supporting and connecting piece 4 is bolted on the upper flange of the steel beam 2, so that the steel beam 2 can horizontally slide along the length direction of the steel beam 2 after being vibrated. Under the combined action of vertical sliding and horizontal sliding, the steel beam 2 can rotate towards the direction of the steel column 1. The support connection end plate 413 is provided with a hinge hole 416, and the steel support 3 is hinged on the support connection member 4 through the hinge hole 416 and the pin shaft 312.
Further, in this embodiment, the supporting connection vertical plate 411 and the supporting connection horizontal plate 412 are both rectangular plates, and the supporting connection member 4 is a trapezoidal plate.
Further, in the present embodiment, the two rows of column end bar holes 414 and the two rows of beam end bar holes 415 are respectively disposed on both sides of the support connection end plate 413, that is, the support connection end plate 413 is disposed at the middle position of the support connection vertical plate 411 and the support connection horizontal plate 412, so as to improve the stress condition of the support connection member 4.
Further, in the present embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 7, a total of four column end elongated holes 414 are provided, and two column end elongated holes 414 are a pair of two pairs each of which is provided on two sides of the supporting and connecting end plate 413. The beam end elongated holes 415 are four in total, and two beam end elongated holes 415 are a pair of two pairs and are arranged on two sides of the support connection end plate 413.
In this embodiment, as shown in fig. 1, 2, 3 and 7, two connecting ear plates 311 are provided at the ends of the steel support 3, and preferably, the steel support 3 and the connecting ear plates 311 are integrally formed. The connecting ear plates 311 are provided with pin shaft holes corresponding to the hinge holes 416, and after the supporting connecting end plate 413 is inserted between the two connecting ear plates 311, the pin shaft 312 is inserted through the hinge holes 416 and the pin shaft holes, so that the connecting ear plates 311 are hinged on the supporting connecting end plate 413.
In order to protect the supporting and connecting member 4, the steel beam 2 and the steel column 1 from being damaged by collision in an earthquake and improve the frictional resistance between the three, in this embodiment, a column end rubber gasket 419 is disposed between the steel column 1 and the supporting and connecting vertical plate 411, and a gasket strip hole having the same size as the column end strip hole 414 is formed in the column end rubber gasket 419. The vertical sliding bolt 417 is inserted into the column end long hole 414 on the support connecting piece 4, the gasket long hole on the column end rubber gasket 419 and the bolt round hole on the steel column 1 in sequence, the end of the vertical sliding bolt 417 extending out of the column end long hole 414 is provided with a long round hole gasket 11 and is screwed by a nut 9, and the end of the vertical sliding bolt 417 extending out of the steel column 1 is provided with a common gasket 10 and is screwed by the nut 9. A beam end rubber gasket 420 is arranged between the upper flange of the steel beam 2 and the supporting and connecting transverse plate 412, and a gasket long hole with the same size as the beam end long hole 415 is formed in the beam end rubber gasket 420. The horizontal sliding bolt 418 sequentially penetrates through a beam end strip hole 415 on the supporting and connecting part 4, a gasket strip hole on the beam end rubber gasket 420 and a steel beam strip hole 211 on the steel beam 2, then the slotted hole gaskets 11 are installed at two ends of the horizontal sliding bolt 418, the nuts 9 are screwed in, the SMA wires 7 are wound, and then the nuts 9 are installed to clamp the SMA wires 7. Preferably, the column-end rubber gasket 419 and the beam-end rubber gasket 420 are both butyl rubber gaskets, and the butyl rubber has good air tightness, strong heat resistance, ozone resistance, aging resistance, chemical resistance and good shock absorption performance.
The embodiment also provides a self-resetting SMA device at a node of a steel supporting beam column, which applies the supporting connecting piece 4, as shown in fig. 1 to 7, the supporting connecting piece 4 is arranged between the upper flanges of the steel column 1 and the steel beam 2, the steel support 3 is hinged on the supporting connecting piece 4, and the lower flanges of the steel column 1 and the steel beam 2 are fixedly connected. When the steel beam is subjected to earthquake, the steel beam 2 can rotate around the connection part of the lower flanges of the steel column 1 and the steel beam 2, the supporting connecting piece 4 generates vertical low-friction sliding energy consumption up and down, meanwhile, the steel beam 2 generates horizontal low-friction sliding energy consumption between the length direction of the steel beam 2 and the supporting connecting piece 4, and under the action of the horizontal sliding bolt 418 and the SMA wire 7, the steel beam 2 is always pulled, so that the opening and closing effect of the connecting node under the common combination of axial force, shearing force and bending moment is effectively reduced, the resetting and energy consumption capabilities are provided for the connecting node, and the earthquake resistance and the function recovery capability after the earthquake of the steel structure beam column node are improved.
In this embodiment, as shown in fig. 1, fig. 5 and fig. 6, the lower flanges of the steel column 1 and the steel beam 2 are connected by a T-shaped connecting member 5, the T-shaped connecting member 5 includes a column end connecting vertical plate 511 and a beam end connecting transverse plate 512, and the end of the beam end connecting transverse plate 512 is fixedly connected with the middle of the column end connecting vertical plate 511, and may be welded or integrally formed. The column end connecting vertical plate 511 is provided with a plurality of column end round holes 513, the beam end connecting transverse plate 512 is provided with a plurality of beam end round holes 514, the column end round holes 513 are connected with the steel column 1 through common bolts, and then common gaskets 10 and nuts 9 are respectively installed at two ends of the common bolts for fastening. A plurality of steel beam bolt holes 214 are formed in the lower flange of the steel beam 2, the beam end circular hole 514 and the steel beam bolt holes 214 are connected through common bolts, and common gaskets 10 and nuts 9 are respectively installed at two ends of the common bolts for fastening. In this embodiment, preferably, the column-end connecting vertical plate 511 and the beam-end connecting horizontal plate 512 are rectangular plates, and the beam-end circular hole 514, the column-end circular hole 513, the steel beam bolt hole 214, and the bolt hole on the steel column 1 are all four, so as to ensure that the T-shaped connecting member 5 is stably connected with the steel column 1 and the steel beam 2. The central point 615 of the contact position between the connecting position of the column end connecting vertical plate 511 and the beam end connecting transverse plate 512 and the steel column 1 is a rotation centroid point of the steel beam 2 rotating around the steel column 1. Namely, the steel beam 2 rotates around the rotation centroid point when being shocked.
In this embodiment, as shown in fig. 1 and 4, angle steel connectors 6 are disposed on two sides of a web of the steel beam 2, each angle steel connector 6 includes an angle steel column end connecting plate 611 and an angle steel beam end connecting plate 612, and an end of each angle steel beam end connecting plate 612 is fixedly connected to the bottom of each angle steel column end connecting plate 611, preferably welded or integrally formed. The angle steel column end connecting plate 611 is provided with a plurality of angle steel column end round holes 613, ordinary bolts are inserted into the angle steel column end round holes 613 and then are in bolted connection with bolt holes in the steel column 1, and then ordinary gaskets 10 and nuts 9 are sequentially mounted at the two ends of the ordinary bolts for fastening. Angle steel beam end connecting plate 612 is equipped with a plurality of angle steel beam end round holes 614, is equipped with a plurality of arc holes 212 on the web of girder steel 2, and arc bolt 213 inserts and carries out bolted connection after the center of arc hole 212 aligns with angle steel beam end round hole 614. Preferably, there are two angle steel connecting pieces 6, four angle steel beam end circular holes 614, and four arc-shaped holes 212.
In order to ensure that the steel beam 2 can rotate around the center point 615, in the embodiment, as shown in fig. 1, the rotational centroids of the plurality of arc-shaped holes 212 are all set to be the center point 615 of the connection between the T-shaped connecting member 5 and the steel column 1. So that the steel beam 2 can smoothly rotate around the central point 615.
As shown in FIG. 1, the steel column 1 is H-shaped steel, and a plurality of internal stiffening ribs 8 are arranged on two sides of a web plate of the steel column 1. Preferably, stiffening rib 8 has four in the post, and two liang each other are each other a set of branch and establish the both sides at 1 web of steel column, and stiffening rib 8 sets up the position respectively with the top flange and the bottom flange of girder steel 2 on same horizontal plane in the post on 1 web unilateral of steel column, through setting up 8 improvement stiffening ribs in the post steel column 1 and bear the impact of the power that girder steel 2 rotated and bring, improves the overall structure intensity of steel column 1 to improve the shock resistance, avoid taking place to warp.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A self-resetting SMA device at a steel supporting beam-column node is applied with a supporting connecting piece at the steel supporting beam-column node, wherein the supporting connecting piece is used for connecting a steel column, a steel beam and a steel support, and is characterized in that the supporting connecting piece is arranged between the upper flanges of the steel column and the steel beam, the steel support is hinged on the supporting connecting piece, the steel column is fixedly connected with the lower flange of the steel beam, column end strip holes arranged along the height direction of the steel column and beam end strip holes arranged in pairs along the length direction of the steel beam are arranged on the supporting connecting piece, and the supporting connecting piece is connected on the steel column through column end strip holes in a bolt manner; the upper flange of the steel beam is provided with a steel beam long hole corresponding to the beam end long hole, and the steel beam long hole is connected with the beam end long hole through a bolt; an SMA wire which can always pull the steel beam and can reset the steel beam is connected between the bolts in each pair of the long strip holes at the beam ends; the steel support is hinged on the support connecting piece; an angle steel connecting piece is arranged between the steel column and the web plate of the steel beam and comprises an angle steel column end connecting plate and an angle steel beam end connecting plate which are connected with each other; the steel beam comprises a steel column and is characterized in that a web plate of the steel beam is provided with a plurality of arc-shaped holes, arc-shaped bolts connected with the angle steel beam end connecting plate through bolts are arranged in the arc-shaped holes, and the angle steel column end connecting plate is connected with the steel column through bolts.
2. The self-resetting SMA device at a node of a steel supporting beam column of claim 1, wherein the supporting connecting piece comprises a supporting connecting vertical plate and a supporting connecting transverse plate which are connected with each other, and a supporting connecting end plate is connected between the supporting connecting vertical plate and the supporting connecting transverse plate; the steel column supporting and connecting device is characterized in that two rows of column end strip holes arranged in the height direction of the steel column are formed in the supporting and connecting vertical plate, two rows of beam end strip holes arranged in the length direction of the steel beam are formed in the supporting and connecting transverse plate, and hinge holes for the steel support to be rotatably connected are formed in the supporting and connecting end plate.
3. The self-resetting SMA device in a steel bracing beam-column node of claim 2, wherein two rows of said column end elongated holes and two rows of said beam end elongated holes are provided on either side of said bracing attachment end plate.
4. The self-resetting SMA device for a node of a steel supporting beam column of claim 3, wherein the end of the steel support is provided with two connecting lug plates, and the support connecting end plate is inserted between the two connecting lug plates and connected with the connecting lug plates through the hinge holes and the pin shaft.
5. The self-resetting SMA device at a node of a steel supporting beam column according to any one of claims 2 to 4, wherein a column end rubber gasket is arranged between the steel column and the supporting connecting vertical plate, a beam end rubber gasket is arranged between the upper flange of the steel beam and the supporting connecting transverse plate, and gasket slots corresponding to the column end slot and the beam end slot are respectively arranged on the column end rubber gasket and the beam end rubber gasket.
6. The self-resetting SMA device in a node of a steel supporting beam column of claim 1, wherein the steel column and the lower flange of the steel beam are connected by a T-shaped connecting piece, the T-shaped connecting piece comprises a column end connecting vertical plate and a beam end connecting transverse plate which are connected with each other, the column end connecting vertical plate is connected with the steel column through bolts, and the beam end connecting transverse plate is connected with the lower flange of the steel beam through bolts.
7. The self-resetting SMA device used in a node of a steel supporting beam and a steel column according to claim 6, wherein the rotation centroids of the plurality of arc-shaped holes are the central points of the joints of the T-shaped connecting pieces and the steel column.
8. The self-resetting SMA device at a node of a steel supporting beam column according to claim 1, wherein the steel column is H-shaped steel, and the web of the steel column is provided with an inner column stiffening rib which is on the same horizontal plane with the upper flange and the lower flange of the steel beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526954.6A CN113216436B (en) | 2021-05-14 | 2021-05-14 | Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526954.6A CN113216436B (en) | 2021-05-14 | 2021-05-14 | Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113216436A CN113216436A (en) | 2021-08-06 |
| CN113216436B true CN113216436B (en) | 2022-08-26 |
Family
ID=77095784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526954.6A Active CN113216436B (en) | 2021-05-14 | 2021-05-14 | Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113216436B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086667B (en) * | 2021-12-30 | 2023-05-16 | 中国电建集团贵阳勘测设计研究院有限公司 | S-shaped node for steel structure |
| CN114922290A (en) * | 2022-06-10 | 2022-08-19 | 湖南省富生钢结构有限公司 | Complicated node and steel column with complicated node |
| CN115492122A (en) * | 2022-09-23 | 2022-12-20 | 中冶华天南京工程技术有限公司 | Fabricated lateral force resisting bracket for deep foundation pit section steel support and construction method |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000008646A (en) * | 1998-06-25 | 2000-01-11 | Takenaka Komuten Co Ltd | Damping structure for column base of construction |
| CN105839968A (en) * | 2016-05-19 | 2016-08-10 | 华南理工大学 | Connecting node plate with sliding end plate for buckling-restrained brace |
| KR20180072947A (en) * | 2016-12-22 | 2018-07-02 | 영산대학교산학협력단 | Connection System of Progressive Collapse-Resistant Steel Moment Beam-Column using Damper |
| CN108277890A (en) * | 2018-04-18 | 2018-07-13 | 山东大学 | Self-resetting bean column node and steel building based on SMA bars |
| CN108824639A (en) * | 2018-07-16 | 2018-11-16 | 济南大学 | A kind of energy-dissipating and shock-absorbing Column Joint and its design method |
| CN110130486A (en) * | 2019-05-17 | 2019-08-16 | 东北电力大学 | A kind of buckling-restrained node component of combined type |
| CN110219369A (en) * | 2019-07-10 | 2019-09-10 | 重庆大学 | Buckling-restrained beam column Self-resetting node and assemble method based on steel-SMA board group element |
| CN110258786A (en) * | 2019-07-17 | 2019-09-20 | 中恒建设集团有限公司 | A kind of full assembly concrete beam-concrete column-bracing members combination connecting node |
| CN110835952A (en) * | 2019-11-25 | 2020-02-25 | 海南大学 | Anti-seismic tough steel pipe concrete column and steel beam frame structure and construction method |
| CN110924539A (en) * | 2019-12-06 | 2020-03-27 | 燕山大学 | Self-resetting steel pipe concrete column-steel beam joint connecting device |
| CN111119365A (en) * | 2020-01-16 | 2020-05-08 | 苏州科技大学 | Self-reset node with double reset systems |
| CN111519967A (en) * | 2020-05-11 | 2020-08-11 | 北京工业大学 | Non-destructive SMA self-resetting steel frame node |
| CN111636745A (en) * | 2020-06-15 | 2020-09-08 | 南昌大学 | Steel construction is from restoring to throne beam column combination node device |
| WO2020181794A1 (en) * | 2019-03-12 | 2020-09-17 | 青岛理工大学 | Fabricated self-restoration pitch point |
| CN111794374A (en) * | 2020-06-18 | 2020-10-20 | 华南理工大学 | Recoverable functional node of high-strength steel column-common steel beam-low yield point steel T-shaped steel |
| CN111809734A (en) * | 2020-09-15 | 2020-10-23 | 湖南大学 | Supporting building with tension-compression reversing characteristic and assembling method thereof |
| CN112096158A (en) * | 2020-09-15 | 2020-12-18 | 重庆大学 | Assembly type self-resetting beam column joint and construction method thereof |
| CN112627340A (en) * | 2020-12-21 | 2021-04-09 | 同济大学 | Novel friction connection supports multiple post steel frame construction system that sways |
| CN213143426U (en) * | 2020-05-29 | 2021-05-07 | 南昌大学 | Novel RCS beam column joint connection form of on-site full-bolt connection |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7497054B2 (en) * | 2001-06-06 | 2009-03-03 | Nippon Steel Corporation | Column-and-beam join structure |
| US6681538B1 (en) * | 2002-07-22 | 2004-01-27 | Skidmore, Owings & Merrill Llp | Seismic structural device |
| JP4649250B2 (en) * | 2004-11-26 | 2011-03-09 | 新日鉄エンジニアリング株式会社 | Seismic reinforcement joint structure |
| CN108951863A (en) * | 2018-10-10 | 2018-12-07 | 安徽建筑大学 | The recoverable energy dissipation connecting node of prefabrication and assembly construction steel construction |
| CN109853767A (en) * | 2019-02-28 | 2019-06-07 | 南昌大学 | A kind of Self-resetting support device based on marmem and low friction gasket |
| CN110206145B (en) * | 2019-05-30 | 2020-07-14 | 西安建筑科技大学 | Assembled beam column connected node |
| CN110258800B (en) * | 2019-06-05 | 2024-07-05 | 南昌大学 | Full-assembled restorable function RCS combined node with support connection |
| CN110820931A (en) * | 2019-11-14 | 2020-02-21 | 南昌大学 | Full-assembly type concrete beam-column joint based on T-shaped connecting piece and long round hole |
| CN212200856U (en) * | 2020-01-16 | 2020-12-22 | 苏州科技大学 | Self-reset node with double reset systems |
| CN111962953B (en) * | 2020-08-07 | 2024-06-21 | 北京工业大学 | Concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and manufacturing method |
| CN215406545U (en) * | 2021-04-30 | 2022-01-04 | 福建九鼎建设集团有限公司 | Steel construction power consumption beam column node |
-
2021
- 2021-05-14 CN CN202110526954.6A patent/CN113216436B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000008646A (en) * | 1998-06-25 | 2000-01-11 | Takenaka Komuten Co Ltd | Damping structure for column base of construction |
| CN105839968A (en) * | 2016-05-19 | 2016-08-10 | 华南理工大学 | Connecting node plate with sliding end plate for buckling-restrained brace |
| KR20180072947A (en) * | 2016-12-22 | 2018-07-02 | 영산대학교산학협력단 | Connection System of Progressive Collapse-Resistant Steel Moment Beam-Column using Damper |
| CN108277890A (en) * | 2018-04-18 | 2018-07-13 | 山东大学 | Self-resetting bean column node and steel building based on SMA bars |
| CN108824639A (en) * | 2018-07-16 | 2018-11-16 | 济南大学 | A kind of energy-dissipating and shock-absorbing Column Joint and its design method |
| WO2020181794A1 (en) * | 2019-03-12 | 2020-09-17 | 青岛理工大学 | Fabricated self-restoration pitch point |
| CN110130486A (en) * | 2019-05-17 | 2019-08-16 | 东北电力大学 | A kind of buckling-restrained node component of combined type |
| CN110219369A (en) * | 2019-07-10 | 2019-09-10 | 重庆大学 | Buckling-restrained beam column Self-resetting node and assemble method based on steel-SMA board group element |
| CN110258786A (en) * | 2019-07-17 | 2019-09-20 | 中恒建设集团有限公司 | A kind of full assembly concrete beam-concrete column-bracing members combination connecting node |
| CN110835952A (en) * | 2019-11-25 | 2020-02-25 | 海南大学 | Anti-seismic tough steel pipe concrete column and steel beam frame structure and construction method |
| CN110924539A (en) * | 2019-12-06 | 2020-03-27 | 燕山大学 | Self-resetting steel pipe concrete column-steel beam joint connecting device |
| CN111119365A (en) * | 2020-01-16 | 2020-05-08 | 苏州科技大学 | Self-reset node with double reset systems |
| CN111519967A (en) * | 2020-05-11 | 2020-08-11 | 北京工业大学 | Non-destructive SMA self-resetting steel frame node |
| CN213143426U (en) * | 2020-05-29 | 2021-05-07 | 南昌大学 | Novel RCS beam column joint connection form of on-site full-bolt connection |
| CN111636745A (en) * | 2020-06-15 | 2020-09-08 | 南昌大学 | Steel construction is from restoring to throne beam column combination node device |
| CN111794374A (en) * | 2020-06-18 | 2020-10-20 | 华南理工大学 | Recoverable functional node of high-strength steel column-common steel beam-low yield point steel T-shaped steel |
| CN111809734A (en) * | 2020-09-15 | 2020-10-23 | 湖南大学 | Supporting building with tension-compression reversing characteristic and assembling method thereof |
| CN112096158A (en) * | 2020-09-15 | 2020-12-18 | 重庆大学 | Assembly type self-resetting beam column joint and construction method thereof |
| CN112627340A (en) * | 2020-12-21 | 2021-04-09 | 同济大学 | Novel friction connection supports multiple post steel frame construction system that sways |
Non-Patent Citations (5)
| Title |
|---|
| 基于有限元的新型高延性角钢连接节点抗震性能评估;黄冀卓等;《福州大学学报(自然科学版)》;20130828(第04期);全文 * |
| 形状记忆合金在土木工程上的应用进展;彭文屹等;《热处理技术与装备》;20071025(第05期);全文 * |
| 胡淑军等.自复位SMA支撑的滞回性能与简化力学模型.《建筑结构学报》.2020,全文. * |
| 自复位SMA支撑的滞回性能与简化力学模型;胡淑军等;《建筑结构学报》;20200904;全文 * |
| 防屈曲支撑角部节点板与钢框架的相互作用效应;孔瑜文等;《土木工程学报》;20161015;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113216436A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113216436B (en) | Supporting connecting piece at joint of steel supporting beam column and self-resetting SMA device | |
| CN110924539B (en) | Self-resetting steel pipe concrete column-steel beam joint connecting device | |
| CN105672476B (en) | A kind of marmem is combined the beam column of steel structure splicing node of edge of a wing friction | |
| CN109267667B (en) | Multidirectional self-resetting shape memory alloy damper and installation method thereof | |
| CN111636623A (en) | Beam string structure with high continuous collapse resistance and implementation method thereof | |
| CN107514076B (en) | Bearing-free steel plate shear wall only subjected to shearing force | |
| CN115095185A (en) | Frame structure with anti-seismic reinforcing device | |
| KR101439744B1 (en) | Coupling structure for beam to column connection | |
| CN212775915U (en) | Bolt ball node grid structure antidetonation gallows | |
| CN114517523B (en) | Multi-layer air corridor for high-rise steel structure building and construction method thereof | |
| CN217518346U (en) | Cloud deck box type power transmission line emergency repair tower | |
| CN215978599U (en) | Building structure design beam column reinforced structure | |
| CN213773965U (en) | Assembled shock attenuation wall structure | |
| CN205399746U (en) | Steel construction shear force wall | |
| CN215107815U (en) | Strong wind-resistant shockproof transmission tower | |
| CN114520487A (en) | Self-adaptive balance type power transmission high-voltage cable rack | |
| CN113154306A (en) | Anti-seismic support for suspended lighting equipment and mounting method | |
| CN111636745B (en) | Steel construction is from restoring to throne beam column combination node device | |
| CN115207857B (en) | Wind deflection prevention device for insulator string of power transmission tower | |
| CN214941217U (en) | Movable sound-absorbing, sound-insulating and noise-reducing device | |
| CN113585463B (en) | Beam column friction energy consumption node | |
| CN214468217U (en) | A antidetonation support for suspension type lighting apparatus | |
| CN220580188U (en) | Assembled recoverable concrete frame beam column node | |
| CN217420708U (en) | Frame-cable supporting structure system | |
| CN212507117U (en) | Steel structure protective frame of building roof ventilation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |