CN219175532U

CN219175532U - Liftable H-shaped steel column with replaceable damper

Info

Publication number: CN219175532U
Application number: CN202320231128.3U
Authority: CN
Inventors: 周焕廷; 马士朝; 王峥峥
Original assignee: Wuhan University of Technology WUT; Sanya Science and Education Innovation Park of Wuhan University of Technology
Current assignee: Wuhan University of Technology WUT; Sanya Science and Education Innovation Park of Wuhan University of Technology
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-06-13
Anticipated expiration: 2033-02-16

Abstract

The utility model discloses a liftable H-shaped steel column with a replaceable damper, which comprises an H-shaped steel column and the replaceable damper arranged at the lower part of the H-shaped steel column; the replaceable damper comprises a sleeve and two sets of damping plates symmetrically welded on the outer peripheral surface of the sleeve; the sleeve comprises a rectangular hollow steel pipe, a fixed cover plate and a ground anchor bolt, one end of the ground anchor bolt sequentially penetrates through the fixed cover plate at the upper end, the rectangular hollow steel pipe and the fixed cover plate at the lower end, and the upper end and the lower end of the ground anchor bolt are locked on the fixed cover plate through fixing nuts; the bottom of the H-shaped steel column is welded with a column foot bottom plate, and the lower end of the ground anchor bolt penetrates through the column foot bottom plate. The vertical constraint of the column foot bottom plate and the foundation is released, and the energy is dissipated by utilizing the vertical lifting displacement of the steel column foot, so that the damage of the steel column is avoided, and the durability of the building structure is further improved; the main building structure is protected as much as possible by using the plastic deformation energy consumption and the replaceable mechanism of the replaceable damper, so that the disaster resistance capability of the building structure is improved.

Description

Liftable H-shaped steel column with replaceable damper

Technical Field

The utility model belongs to the technical field of disaster prevention and reduction of constructional engineering and structures, and particularly relates to a liftable H-shaped steel column with a replaceable damper.

Background

With the continuous development of construction steel construction technology in recent years, steel construction is widely used in various types of construction structures. The steel column is an important stressed member in a steel structure system, and the common steel column is mainly rigidly connected or hinged, so that the rigid connection column foot is easy to enter a yield state under the action of load, the steel column is damaged and loses bearing capacity, and the repairing difficulty is high; the hinge column base is easy to damage in the later plastic stage, so that the building collapses, and serious economic loss and casualties are caused. The disaster prevention and reduction capability of the common steel column has a certain limitation. Firstly, a common steel column base is easy to damage under the action of load, so that the steel column loses bearing capacity, and a building collapses; and secondly, the reinforcing and repairing work after the disaster of the common steel column base is long in time consumption, high in cost and large in difficulty, so that the economy of repairing the steel column after the disaster is reduced, and the practical value of a building is seriously influenced.

Disclosure of Invention

The utility model aims at solving the technical defects and provides an H-shaped steel column with a replaceable damper, which can prevent the steel column from being damaged and further improve the durability of a building structure.

In order to achieve the above purpose, the utility model provides a liftable H-shaped steel column with a replaceable damper, which comprises an H-shaped steel column and the replaceable damper arranged at the lower part of the H-shaped steel column; the replaceable damper comprises a sleeve and two sets of damping plates symmetrically welded on the outer peripheral surface of the sleeve; the sleeve comprises a rectangular hollow steel pipe, fixed cover plates welded on the upper end face and the lower end face of the rectangular hollow steel pipe and a ground anchor bolt, one end of the ground anchor bolt sequentially penetrates through the fixed cover plates at the upper end, the rectangular hollow steel pipe and the fixed cover plates at the lower end, and the upper end and the lower end of the ground anchor bolt are locked on the fixed cover plates through fixing nuts; the bottom of the H-shaped steel column is welded with a column foot bottom plate, and the lower end of the ground anchor bolt penetrates through the column foot bottom plate.

Further, each set of damping plate comprises an energy consumption steel plate, two small buckling-restrained cover plates and one large buckling-restrained cover plate; the energy consumption steel plate comprises two L-shaped end connecting plates, a middle connecting plate and two longitudinal butterfly plate strips, wherein a longitudinal butterfly plate strip is respectively arranged between each L-shaped end connecting plate and the middle connecting plate; the horizontal plate of each L-shaped end connecting plate is provided with a bolt hole with the same diameter as the first bolt, and the folding plate of each L-shaped end connecting plate is provided with a bolt hole with the same diameter as the second bolt; four apex angle positions of the large buckling-restrained cover plate are all provided with bolt holes with the same diameter as the first bolts, the large buckling-restrained cover plate is fixed on the outer surface of the energy-dissipating steel plate through the first bolts, meanwhile, the outer edges of the two small buckling-restrained cover plates are fixed on the inner surface of the energy-dissipating steel plate through the first bolts, the inner edges of the two small buckling-restrained cover plates are fixed on a middle connecting plate of the energy-dissipating steel plate through bolts, and the two small buckling-restrained cover plates and the middle connecting plate of the energy-dissipating steel plate enclose to form grooves for welding rectangular hollow steel pipes.

Further, the folding plate of each L-shaped end connecting plate is connected with the column foot flange of the H-shaped steel column through a second bolt, so that the replaceable damper is mounted on the H-shaped steel column.

Further, the butterfly plate strips in the longitudinal rows are steel plates with diamond holes in the plane.

Further, column foot stiffening ribs are arranged between column foot flanges of the H-shaped steel column and above the replaceable damper.

Further, the column foot limiting device comprises four column foot limiting devices which are correspondingly arranged around the column foot bottom plate and welded on the foundation surface to limit the column foot bottom plate.

Compared with the prior art, the utility model has the beneficial effects that: according to the H-shaped steel column with the swinging self-resetting mechanism, the vertical constraint of the column foot bottom plate and the foundation is released, and the energy is dissipated by utilizing the vertical lifting displacement of the column foot of the steel column, so that the damage of the steel column is avoided, and the durability of a building structure is further improved; the plastic deformation energy consumption and the replaceable mechanism of the replaceable damper are utilized, so that the main building structure is protected as much as possible, the disaster resistance capability of the building structure is improved, the functional restorability of the structure can be realized after the damper is replaced, the repair work of the post-disaster building is more environment-friendly, and the method contributes to sustainable development of disaster prevention and reduction of the building in China.

Drawings

Fig. 1 is a schematic front view of a section steel column of the present utility model.

Fig. 2 is a schematic perspective view of the section steel column of the present utility model.

Fig. 3 is an exploded schematic view of the replaceable damper of fig. 2.

Fig. 4 is a schematic view of the structure of the replaceable damper of fig. 2.

Fig. 5 is a schematic structural view of the energy-dissipating steel plate of fig. 3.

Fig. 6 is a schematic view of the sleeve of fig. 3.

Detailed Description

The utility model will be further described in detail with reference to the drawings and specific examples, which are given to facilitate a clearer understanding of the utility model, but are not to be construed as limiting the utility model.

The H-shaped steel column with the liftable replaceable damper shown in fig. 1 and 2 comprises an H-shaped steel column 2, the replaceable damper 1 arranged at the lower part of the H-shaped steel column 2 and a column foot limiting device 3.

Referring to fig. 3, the replaceable damper 1 includes a sleeve 6 and two sets of damping plates symmetrically welded to the outer circumferential surface of the sleeve 6; referring to fig. 6, the sleeve 6 includes a rectangular hollow steel pipe 12, fixing cover plates 13 welded on the upper and lower end surfaces of the rectangular hollow steel pipe 12, and a ground anchor bolt 7, one end of the ground anchor bolt 7 sequentially passes through the fixing cover plates 13 at the upper end, the rectangular hollow steel pipe 12, and the fixing cover plates 13 at the lower end, and the fixing nuts 8 flexibly fix the rectangular hollow steel pipe 12 through threads at the two ends of the ground anchor bolt 7, so that a replaceable mechanism of the damper is realized.

As shown in fig. 3 and 4 again, each set of damping plates comprises an energy consumption steel plate 4, two small buckling-preventing cover plates 5 and one large buckling-preventing cover plate 22. Referring to fig. 5, the energy consumption steel plate 4 includes two L-shaped end connection plates 9, a middle connection plate 10 and two butterfly plate strips 11 in longitudinal rows, and each butterfly plate strip 11 in longitudinal rows is lined between each L-shaped end connection plate 9 and the middle connection plate 10; the horizontal plate 16 of each L-shaped end connecting plate 9 is provided with a bolt hole with the same diameter as the first bolt 17, and the folding plate 14 of each L-shaped end connecting plate 9 is provided with a bolt hole with the same diameter as the second bolt 15; similarly, bolt holes with the same diameter as the first bolts 17 are formed in four vertex angle positions of the large buckling-restrained cover plate 22, the large buckling-restrained cover plate 22 is fixed on the outer surface of the energy-dissipating steel plate 4 through the first bolts 17, meanwhile, the outer edges of the two small buckling-restrained cover plates 5 are fixed on the inner surface of the energy-dissipating steel plate 4 through the first bolts 17, the inner edges of the two small buckling-restrained cover plates are fixed on the middle connecting plate 10 of the energy-dissipating steel plate 4 through bolts, and the two small buckling-restrained cover plates 5 and the middle connecting plate 10 of the energy-dissipating steel plate 4 are enclosed to form grooves for welding of the rectangular hollow steel pipes 12. The folding plate 14 of each L-shaped end connection plate 9 is connected with the column foot flange 19 of the H-shaped steel column 2 by the second bolt 15, thereby mounting the replaceable damper 1 on the H-shaped steel column 2. In the embodiment, the longitudinal butterfly plate strips 11 are steel plates with diamond holes in the plane, so that the multi-point yielding energy consumption of the energy consumption steel plate 4 in the plane is realized, and the phenomenon of stress concentration caused by local buckling is avoided.

The energy consumption steel plate 4 is connected to the column foot flange 19 through the L-shaped end connecting plate 9 and the second bolt 15 so as to dissipate energy input to the component main body, and the large buckling-preventing cover plate 22 and the two small buckling-preventing cover plates 5 are fixed on the energy consumption steel plate 4 so as to prevent the energy consumption steel plate 4 from buckling out of plane in the energy consumption process.

In addition, the bottom of the H-shaped steel column 2 is welded with a column foot bottom plate 18, the lower end of the ground anchor bolt 7 penetrates through the column foot bottom plate 18 to be in bolt connection with a foundation, and the column foot bottom plate 18 is not fixedly connected with the foundation. A column foot stiffening rib 20 is arranged between the column foot flanges 19 and above the replaceable damper 1, and the column foot stiffening rib 20 is connected with the column foot flanges 19 and the steel column web 21 by fillet welds. The four column foot limiting devices 3 are correspondingly arranged around the column foot bottom plate 18 and welded on the upper surface of the foundation to limit the column foot bottom plate 18, under the action of horizontal load, the bottom of the column foot bottom plate 18 is not connected with the foundation but is nested on the ground anchor bolts 7, the horizontal plane internal displacement of the H-shaped steel column 2 is limited by the ground anchor bolts 7 and the column foot limiting devices 3, and the H-shaped steel column 2 is changed into a column foot liftable swinging component.

According to the utility model, by releasing the vertical constraint between the column foot bottom plate 18 and the foundation, under the action of horizontal load, the column foot bottom plate 18 is continuously lifted to swing the H-shaped steel column 2 due to the release of the vertical degree of freedom, the L-shaped end connecting plate 9 and the column foot flange 19 of the replaceable damper 1 jointly generate upward displacement, the middle connecting plate 10 is fixed on the ground anchor bolt 7 through the sleeve 6, and the energy consumption steel plate 4 gradually yields and generates bending and shearing deformation due to the relative displacement of the L-shaped end connecting plate 9 and the middle connecting plate 10, so that the energy input to the component is dissipated, and the effect of no damage or low damage of the column foot of the steel column is realized.

Through setting up removable attenuator 1 in H shaped steel post 2 column base department, under the horizontal load effect, the L type end connecting plate 9 of removable attenuator 1 produces ascending displacement jointly with column base flange 19 for energy consumption steel sheet 4's both ends produce vertical relative deformation, lead to the great and great regional concentration of plastic deformation of the stress of H shaped steel post 2 to be in removable attenuator 1 department, thereby avoided H shaped steel post 2 to take place local great buckling deformation and destroy owing to column base flange 19, effectively protected the main part component. The replaceable damper is connected with the column foot flange 19 through the second bolt 15, so that buckling damage of the column foot flange 19 is avoided, and the aim of rapid repair of the steel column after earthquake is achieved.

The replaceable damper 1 utilizes the plane stress performance of the steel plate to exert the energy consumption effect, and adopts a mode of forming diamond holes in the plane of the energy consumption steel plate to realize multi-point yielding energy consumption, thereby avoiding the stress concentration phenomenon caused by the local yielding of the energy consumption steel plate.

The H-shaped steel column with the swinging self-resetting mechanism dissipates energy by loosening the vertical constraint of the column foot bottom plate 18 and the foundation and utilizing the vertical lifting displacement of the column foot of the steel column, thereby avoiding the damage of the steel column and further improving the durability of the building structure; the plastic deformation energy consumption and the replaceable mechanism of the replaceable damper are utilized, so that the main building structure is protected as much as possible, the disaster resistance capability of the building structure is improved, the functional restorability of the structure can be realized after the damper is replaced, the repair work of the post-disaster building is more environment-friendly, and the method contributes to sustainable development of disaster prevention and reduction of the building in China.

Claims

1. An H-beam steel column with a replaceable damper capable of being lifted, which is characterized in that: comprises an H-shaped steel column (2) and a replaceable damper (1) arranged at the lower part of the H-shaped steel column (2); the replaceable damper (1) comprises a sleeve (6) and two sets of damping plates symmetrically welded on the outer peripheral surface of the sleeve (6); the sleeve (6) comprises a rectangular hollow steel pipe (12), fixed cover plates (13) welded on the upper end face and the lower end face of the rectangular hollow steel pipe (12) and a ground anchor bolt (7), one end of the ground anchor bolt (7) sequentially penetrates through the fixed cover plates (13) at the upper end, the rectangular hollow steel pipe (12) and the fixed cover plates (13) at the lower end, and the upper end and the lower end of the ground anchor bolt (7) are locked on the fixed cover plates (13) through fixing nuts (8); the bottom of the H-shaped steel column (2) is welded with a column foot bottom plate (18), and the lower end of the ground anchor bolt (7) penetrates through the column foot bottom plate (18).

2. The liftable H-beam with replaceable damper of claim 1, wherein: each set of damping plate comprises an energy consumption steel plate (4), two small buckling-restrained cover plates (5) and one large buckling-restrained cover plate (22); the energy consumption steel plate (4) comprises two L-shaped end connecting plates (9), a middle connecting plate (10) and two longitudinal butterfly plate strips (11), wherein a longitudinal butterfly plate strip (11) is respectively lined between each L-shaped end connecting plate (9) and the middle connecting plate (10); the horizontal plate (16) of each L-shaped end connecting plate (9) is provided with a bolt hole with the same diameter as the first bolt (17), and the folding plate (14) of each L-shaped end connecting plate (9) is provided with a bolt hole with the same diameter as the second bolt (15); four apex angle positions of big buckling restrained apron (22) all are provided with the bolt hole the same with first bolt (17) diameter, and big buckling restrained apron (22) are fixed in on the surface of power consumption steel sheet (4) through first bolt (17), and simultaneously, the outside of two little buckling restrained apron (5) is fixed on the internal surface of power consumption steel sheet (4) through first bolt (17), and the interior limit passes through the bolt fastening on the middle part connecting plate (10) of power consumption steel sheet (4), and the middle part connecting plate (10) of two little buckling restrained apron (5) and power consumption steel sheet (4) enclose and form the welded recess of confession rectangle hollow steel pipe (12).

3. The liftable H-beam with replaceable damper of claim 2, wherein: the folding plate (14) of each L-shaped end connecting plate (9) is connected with the column foot flange (19) of the H-shaped steel column (2) through a second bolt (15), so that the replaceable damper (1) is mounted on the H-shaped steel column (2).

4. The liftable H-beam with replaceable damper of claim 2, wherein: the butterfly plate strips (11) in the longitudinal rows are steel plates with diamond holes in the plane.

5. The liftable H-beam with replaceable damper of claim 1, wherein: column foot stiffening ribs (20) are arranged between column foot flanges (19) of the H-shaped steel column (2) and above the replaceable damper (1).

6. The liftable H-beam with replaceable damper of claim 1, wherein: the column foot limiting device (3) is correspondingly arranged around the column foot bottom plate (18) and welded on the foundation surface to limit the column foot bottom plate (18).