CN218843401U

CN218843401U - Swinging structure of replaceable energy consumption damper based on SMA

Info

Publication number: CN218843401U
Application number: CN202222609838.3U
Authority: CN
Inventors: 马辉; 张如一; 赵艳丽; 刘一; 李智超; 干秀英
Original assignee: Xian University of Technology
Current assignee: Xian University of Technology
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-04-11
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a swing structure of removable energy dissipation attenuator based on SMA, including the concrete foundation, set up the recess on the concrete foundation, connect the cross steel column in the recess of concrete foundation, a stay bolt is connected respectively between the adjacent both sides that lie in the steel column on the concrete foundation, a plurality of energy dissipation attenuators of connection between every stay bolt and the adjacent two sides of steel column, each side vertical welding flange board of steel column, pass through bolted connection SMA column end fixed connector on every flange board, just pass through bolted connection SMA foundation connection spare on the concrete foundation to SMA column end fixed connector department, SMA column end fixed connector passes through SMA stranded conductor and connects SMA foundation fixed connector; the energy dissipation damper is arranged at the joint of the steel column base joint, so that the steel column is enabled to swing and form plastic deformation when rotating, the seismic energy is dissipated, and the seismic damage degree of the structure is further reduced.

Description

Swinging structure of replaceable energy consumption damper based on SMA

Technical Field

The utility model belongs to the technical field of energy dissipation shock-absorbing structure and recoverable function swing structure system, concretely relates to swing structure of removable energy consumption attenuator based on SMA.

Background

The traditional earthquake-proof concept is that the earthquake-proof capacity of the structure is enhanced by increasing the rigidity, strength and ductility of the structure, and the traditional earthquake-proof structure often comprises steel columns and concrete bases; the traditional steel column base is generally divided into an exposed column base, an externally-wrapped column base and an embedded column base according to the structural form. The survey shows that the frame structure forms plastic hinges at the column ends, the expected anti-seismic target of a strong column and a weak beam cannot be realized, and particularly the column base area is seriously damaged. The traditional steel column base is easy to suffer from non-ductile damage, is easy to have damages such as buckling or fracture, and the post-earthquake repair strategy is not fully considered, so that the earthquake toughness needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a structure of swaing of removable power consumption attenuator based on SMA is equipped with the power consumption attenuator through the junction at steel column base node, makes the steel column take place to sway and form plastic deformation when rotating, dissipation seismic energy, and then reduces the earthquake damage destruction of structure.

The utility model provides a technical scheme be, the structure of swaing of removable power consumption attenuator based on SMA, including the concrete base, set up the recess on the concrete base, cross steel column is connected in the recess of concrete base, lie in on the concrete base and connect a stay bolt between the adjacent both sides of steel column respectively, connect a plurality of power consumption attenuators between two limits of every stay bolt and adjacent steel column, every limit vertical welding flange board of steel column, through bolted connection SMA column end fixed connector on every flange board, just pass through bolted connection SMA base fixed connector to SMA column end fixed connector department on the concrete base, SMA column end fixed connector passes through SMA stranded wire and connects SMA base fixed connector.

The utility model discloses a characteristics still lie in:

the energy dissipation damper comprises annular section steel, wherein the outer wall of the annular section steel is welded with a circular ring, a plurality of circular rings are sleeved on a long bolt, and the annular section steel is connected with a steel column through a bolt.

And a brass sheet is arranged between the annular profile steel and the steel column, a plurality of holes are formed in the brass sheet, and the bolt between the annular profile steel and the steel column penetrates through the holes of the brass sheet.

The holes on the brass sheet are elliptical holes.

The support ring is sleeved between the adjacent circular rings on the long bolt.

One end of the long bolt far away from the concrete base is connected with a long bolt fixing nut.

Still connect the reinforcing plate in the recess of concrete foundation, the steel column is connected on the reinforcing plate in the concrete foundation recess.

The utility model discloses beneficial effect is:

1) Removing partial restraint between the steel column and the concrete base, changing the traditional steel column base damage mode, converting the bending damage, the shearing damage or the bending and shearing damage into an integral rigid body swing mode, fundamentally changing the stress mechanism of the column base and realizing no damage or low damage of the main body structure after the earthquake;

2) Under the action of earthquake, the steel column base enables the energy dissipation damper to be subjected to self plastic deformation through swinging to dissipate energy, so that the steel column and the concrete base basically keep elasticity, the earthquake resistance under strong earthquake is improved, and the damage of the column base joint is effectively reduced;

3) The column base realizes the self-resetting capability of the structure by arranging the SMA stranded wires on the periphery, and the requirements under different conditions can be met through the number and the positions of the energy-consuming dampers and the SMA stranded wires;

4) The energy dissipation damper does not bear vertical load, the energy dissipation damper is easy to replace after an earthquake, the normal function of the structure is not influenced during replacement, and a more efficient shockproof structure with a recoverable function can be realized;

5) The energy-consuming damper can change the existing form and quantity according to the environmental requirement and the actual situation, and then the long bolt is sleeved; the support ring and the energy dissipation damper are replaced by any form of energy dissipation assembly to adapt to different actual projects, the energy dissipation damper is mounted on the fixed long bolt and is sleeved only, the operation is simple, and the construction cost is low.

6) All parts can be constructed by adopting the mode of factory processing and existing assembly. Through structurally seting up the hole in advance, each part can be connected through predetermineeing the connecting hole and concrete foundation assembly's column bottom coupling assembling to reduce the requirement of site operation, shorten construction period.

Drawings

Fig. 1 is a schematic view of a swing structure of the replaceable energy-consuming damper based on SMA of the present invention;

FIG. 2 is a schematic view of the connection relationship between the transfer head and the concrete foundation according to the present invention;

FIG. 3 is a schematic structural view of a middle-length bolt according to the present invention;

fig. 4 is a schematic structural diagram of the medium energy consumption damper of the present invention;

FIG. 5 is a schematic view of the structure of the support ring of the present invention;

FIG. 6 is a schematic structural view of a brass sheet in the present invention;

FIG. 7 is a schematic structural view of the middle base connection member of the present invention;

fig. 8 is a schematic structural view of the middle column end connector of the present invention;

fig. 9 is a schematic structural diagram of the concrete foundation of the present invention.

In the figure, 1, a steel column, 2, a long bolt, 3, a long bolt fixing nut, 4, an energy dissipation damper, 5, a support ring, 6, a brass sheet, 7, an SMA column end fixing connecting piece, 8, an SMA base fixing connecting piece, 9, an SMA stranded wire, 10, a concrete base, 11, a reinforcing plate and 12, a flange plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The traditional earthquake-proof idea is to enhance the earthquake-proof capability of the structure by increasing the rigidity, strength and ductility of the structure, but the method usually causes serious damage and difficult repair of the structure after the earthquake. The swinging structure can remarkably reduce the post-earthquake damage of the structure, and becomes one of important research directions in the field of seismic engineering. At present, various realization forms such as a swinging column, a swinging wall, a swinging structure and an energy dissipation and shock absorption device are combined. The swing column can relax the constraint between the column and the foundation, and allows the interface of the upper structure and the foundation to generate certain lifting under the action of horizontal overturning moment; when the structure is subjected to strong shock, the upper structure and the foundation interface are repeatedly lifted to cause the integral swing of the upper structure and become a main deformation reaction, so that the integral collapse of the structure caused by the overlarge local deformation of the structure is avoided. In addition, the swing column has self-resetting capability through a post-tensioning rib or steel strand means, so that on one hand, the controllability of the swing reaction of the structure in the earthquake process is enhanced, on the other hand, the recovery period after the earthquake is shortened, and the economic loss is reduced. The inherent dynamic characteristic of the structure cannot be changed when the structure swings, only additional damping is provided, and the structure has full mechanical hysteresis performance, stable dynamic characteristic and strong energy consumption capability.

Shape Memory Alloys (SMA) have a shape memory effect and a superelastic effect, and have been widely used in the field of civil engineering in recent years, and have excellent fatigue resistance in a large deformation cycle and are capable of automatically recovering to the original shape.

The replaceable energy-consuming column base node is different from the traditional rigid column base connection, and can avoid the problem that the whole structure is difficult to repair or is forced to be removed due to overlarge repair cost and long time consumption when irreversible residual deformation occurs in the structure, so that the repair cost is reduced.

The utility model discloses removable energy consumption attenuator's structure of swaing based on SMA, as shown in fig. 1, including concrete foundation 10, set up the recess on the concrete foundation 10, cross-shaped steel column 1 is connected in concrete foundation 10's the recess, concrete foundation 10 can support steel column 1 and sway, a long bolt 2 is connected respectively between the adjacent both sides that lie in steel column 1 on the concrete foundation 10, when pouring concrete foundation 10, as shown in fig. 2, long bolt 2 is pre-buried in concrete foundation 10, connect a plurality of energy consumption attenuators 4 between every long bolt 2 and two limits of adjacent steel column 1, every limit vertical welding wing flange 12 of steel column 1, through bolted connection SMA column end fixed connector 7 on every wing flange 12, wing flange 12 can strengthen the stability that SMA column end fixed connector 7 and steel column 1 are connected, just pass through bolted connection SMA base fixed connector 8 to 7 department of column end fixed connector on the concrete foundation 10, SMA column end fixed connector 7 passes through stranded conductor 9 and connects base fixed connector 8, when the steel column 1 sways, through the energy consumption deformation of two adjacent earthquake column 1, and the energy damage of SMA reduction, the energy consumption deformation of SMA and the adjacent earthquake take place.

The structure of the long bolt 2 is as shown in fig. 3, as shown in fig. 4, the energy-consuming damper 4 comprises annular section steel, a circular ring is welded on the outer wall of the annular section steel, the circular ring is sleeved on the long bolt 2, the annular section steel is connected with the steel column 1 through a bolt, the position of the annular section steel can be fixed through the circular ring, when the steel column 1 vibrates relative to the concrete base 10, the annular section steel can be extruded, and the annular section steel dissipates seismic energy through self deformation.

As shown in fig. 5, the support rings 5 are sleeved between the adjacent rings on the long bolts 2, the widths of the support rings 5 are the same as those of the energy dissipation dampers 4, and the support rings 5 are replaced by the energy dissipation dampers 4 according to actual conditions, so that four or five energy dissipation dampers can be replaced by three energy dissipation dampers on each long bolt on the premise of not changing the size of the long bolt.

As shown in fig. 6, a brass sheet 6 is further arranged between the annular section steel and the steel column 1, a plurality of holes are formed in the brass sheet 6, the bolts between the annular section steel and the steel column 1 penetrate through the holes of the brass sheet 6, and the holes in the brass sheet 6 are elliptical holes, so that the friction energy dissipation capacity can be increased.

As shown in fig. 7, the SMA column end fixing connector 7 includes a support plate connected to the flange plate 12, and a transverse rib plate vertically connected to the SMA stranded wire 9 is provided on the support plate.

As shown in fig. 8, the SMA base fixes the connecting piece 8, the bottom connecting plate is connected with the concrete base 10 through the bolt, the bottom connecting plate is connected with the inverted U-shaped top transverse rib plate, and the top transverse rib plate is connected with the SMA stranded wire 9.

One end of the long bolt 2, which is far away from the concrete base 10, is connected with the long bolt fixing nut 3, so that the energy dissipation damper 4 and the support ring 5 can be prevented from being separated from the long bolt 2.

As shown in fig. 9, a reinforcing plate 11 is further connected in the groove of the concrete base 10, and the steel column 1 is connected to the reinforcing plate 11 in the groove of the concrete base 10, so that the reinforcing plate 11 is in contact with the steel column 1 to prevent the concrete from being fractured.

The utility model discloses the theory of operation of the structure of swaing of removable power consumption attenuator based on SMA does:

in the installation process, the long bolt 2 is embedded into the concrete base 10, the SMA base fixing connecting piece 8 is fixed in the concrete base 10 through the bolt, the steel column 1 is inserted into a groove of the concrete base 10, the energy-consuming dampers 4 and the support ring 5 are sleeved into the fixing long bolt 2 in sequence, after one energy-consuming damper 4 is sleeved each time, the fixing is carried out through the bolt, the energy-consuming dampers 4 are connected with the flange plate 12 through the bolt, the brass sheet 6 is added in the middle of the energy-consuming dampers, and finally the fixing long bolt 2 is sleeved through the long bolt fixing nut 3; fixing the SMA column end fixing connecting piece 7 on the steel column 1 through a bolt; one end of the SMA stranded wire 9 is connected with the transverse ribbed plate of the SMA column end fixing connecting piece 7, and the other end is connected with the transverse ribbed plate at the top of the SMA base fixing connecting piece 8.

When earthquake action occurs, the steel column 1 can swing on the concrete base 10, the energy dissipation damper 4 and the SMA stranded wire 9 are in a tensioned and pressed state to consume earthquake energy, meanwhile, brass sheets 6 are arranged between the two end members connected with the energy dissipation damper 4 to perform friction energy dissipation, and after the earthquake action is finished, the SMA stranded wire 9 can perform self-resetting due to the self characteristics of the SMA stranded wire.

Under the action of a small earthquake, the swinging structure vibrates, but the earthquake action is not enough to overcome the self weight of the structure and the initial resistance of the energy consumption damper 4, the shape of the energy consumption damper 4 is basically unchanged, the swinging structure is in an elastic working stage, the earthquake energy is converted between the structure kinetic energy and the elastic potential energy, and the swinging structure is completely used after the earthquake.

Under the action of a large earthquake, the swinging structure vibrates, the earthquake action overcomes the self weight of the structure and the initial resistance of the energy consumption damper 4, the column base is lifted to one side, the energy consumption damper 4 on the pressed side twists, and the reverse side twists. The earthquake energy is consumed by the deformation of the energy consumption damper 4 and the SMA stranded wire 9, and the passive control capability of the structure is obtained under the earthquake action through the restoring force of the SMA stranded wire 9, so that the aim of recovering the structure function is fulfilled.

In this way, the utility model discloses structure of swaing of removable power consumption attenuator based on SMA, including the concrete base of steel column, power consumption device and the below of top, be equipped with the power consumption attenuator between concrete base and the steel column, the shaped steel edge of a wing inboard is provided with removable power consumption attenuator. By removing part of constraint between the column bottom and the foundation, the self-resetting device and the energy consumption device are integrated, and the swing steel column with the replaceable novel energy consumption damper is designed. When the steel frame is under the action of an earthquake, the deformation of the SMA stranded wires and the novel energy dissipation damper is used for dissipating energy, and the restoring force of the SMA stranded wires is used for enabling the steel column to obtain passive control capability under the action of the earthquake, so that the purpose of restoring the function of the steel column is achieved, the earthquake resistance of the steel column is improved, and earthquake damage of the steel column is effectively reduced.

Claims

1. The swing structure of the replaceable energy-consuming damper based on the SMA is characterized by comprising a concrete base (10), wherein a groove is formed in the concrete base (10), a cross-shaped steel column (1) is connected in the groove of the concrete base (10), a long bolt (2) is connected between two adjacent sides of the steel column (1) on the concrete base (10), a plurality of energy-consuming dampers (4) are connected between each long bolt (2) and two adjacent sides of the steel column (1), flange plates (12) are perpendicularly welded on each side of the steel column (1), each flange plate (12) is connected with an SMA column end fixing connecting piece (7) through a bolt, the concrete base (10) is just opposite to the SMA column end fixing connecting piece (7) and is connected with the SMA base fixing connecting piece (8) through a bolt, and the SMA column end fixing connecting piece (7) is connected with the SMA base fixing connecting piece (8) through an SMA stranded wire (9).

2. The SMA-based replaceable energy consumption damper rocking structure according to claim 1, wherein each energy consumption damper (4) comprises a ring-shaped section steel, the outer wall of the ring-shaped section steel is welded with a ring, a plurality of rings are sleeved on the long bolt (2), and the ring-shaped section steel is connected to the steel column (1) through a bolt.

3. The SMA-based replaceable energy consumption damper swing structure according to claim 2, wherein a brass sheet (6) is further arranged between the annular steel section and the steel column (1), a plurality of holes are formed in the brass sheet (6), and the bolts between the annular steel section and the steel column (1) penetrate through the holes of the brass sheet (6).

4. The SMA-based replaceable dissipative damper rocking structure according to claim 3, wherein the holes on the brass plate (6) are elliptical holes.

5. The SMA-based replaceable dissipative damper rocking structure according to claim 2, wherein a support ring (5) is sleeved on the long bolt (2) between adjacent rings.

6. The SMA-based replaceable dissipative damper rocking structure according to claim 1, wherein the end of the long bolt (2) remote from the concrete foundation (10) is attached to a long bolt fastening nut (3).

7. The SMA-based replaceable energy consuming damper rocking structure of claim 1, wherein a reinforcing plate (11) is further connected in the groove of the concrete base (10), and the steel column (1) is connected to the reinforcing plate (11) in the groove of the concrete base (10).