Compound steel pipe concrete column with built-in energy dissipation component

Abstract

The application discloses a composite steel pipe concrete column with a built-in energy dissipation component, which comprises a square steel pipe column and a cylindrical tensile energy dissipation component built in the bottom of the square steel pipe column. The cylindrical tensile energy dissipation component comprises a steel strip shell, a center column and an elastic support component connected between the steel strip shell and the center column. That is, the steel strip shell and the elastic support component are in a tensile structure, the elastic support component restrains the deformation of the steel strip shell by its own deformation energy dissipation, the steel strip shell is connected with the square steel pipe column through fasteners, the bottom stiffness of the square steel pipe column is improved, the yield deformation of the bottom of the steel pipe column is maintained within a certain range, and buckling damage is avoided. Meanwhile, the cylindrical tensile energy dissipation component can limit the inward or outward yielding of the steel pipe, and can effectively cope with various possible stress forms of the square steel pipe column under the action of an earthquake. In addition, the cylindrical tensile energy dissipation component can reset the steel pipe column through tensile self-resetting after the earthquake.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of steel structure damping, and particularly relates to a compound steel pipe concrete column with a built-in energy dissipation component. BACKGROUND

[0002] At present, researches on the steel pipe concrete structure are mostly concentrated on the beam-column joint part, and researches on the beam-column component are less, and researches on the performance enhancement of the beam-column component are mostly concentrated on the use of fiber reinforced composite materials in the concrete to delay or limit the local buckling of the steel pipe and improve the stress performance of the component, and researches on the improvement of the ultimate bearing capacity and ductility of the steel pipe concrete column by increasing the energy dissipation device are less.

[0003] Through the summary of the damage and theoretical analysis of the steel frame structure in previous earthquakes, it is found that under the action of the horizontal shear force in the earthquake, the axial force, bending moment and shear force at the column bottom are the largest, and the damage of the steel pipe concrete column is mainly concentrated at the column bottom. Therefore, the column bottom is the weak part of the whole steel pipe concrete, and is the key to implement the design concept of strong column and weak beam.

[0004] In recent years, with the continuous development of the seismic design of the steel pipe concrete structure, the energy dissipation technology of the damping device has also been applied in the steel pipe concrete structure. Various damping energy dissipation devices have been applied in the steel pipe concrete structure. At present, there is a case of forming a stiffened rectangular section steel pipe concrete column by arranging horizontal constraint rods in the rectangular section steel pipe concrete column, which limits the lateral deformation of the core concrete, provides lateral support for the steel pipe and improves the local buckling strength of the steel plate.

[0005] Although the above stiffened rectangular section steel pipe concrete column has great advantages, it still has the following defects:

[0006] The arrangement of the constraint rods can greatly improve the mechanical properties of the rectangular steel pipe concrete column, but due to the factors of the component itself, the performance of the rectangular steel pipe concrete column bottom is still insufficient, and the elastic-plastic local buckling phenomenon may occur between the constraint rods.

[0007] The arrangement of the horizontal constraint rods in the stiffened rectangular section steel pipe concrete column provides lateral support for the steel pipe and improves the local buckling strength of the steel plate, but the range of strength improvement is narrow, and the rectangular steel pipe concrete column may still occur buckling failure at a certain position in the column bottom, and the buckling failure mode is not the most ideal failure mode for the rectangular steel pipe concrete column. SUMMARY

[0008] The purpose of the application is to provide a compound steel pipe concrete column which can guarantee the performance of the rectangular section steel pipe concrete column bottom.

[0009] The application provides the composite steel pipe concrete column with the built-in energy consumption component.

[0010] In one embodiment of the above technical scheme, the shell comprises large-diameter annular steel bars and axial steel bars, two large-diameter annular steel bars are arranged in vertical opposition, and a plurality of axial steel bars with a circular arc cross section are fixed along the circumferences of the upper and lower annular steel bars.

[0011] In one embodiment of the above technical scheme, the central column is a circular steel pipe.

[0012] In one embodiment of the above technical scheme, the elastic support assembly comprises small-diameter annular steel bars, inner support rods connected between the small-diameter annular steel bars and the central column, and elastic outer support rod members connected between the small-diameter annular steel bars and the large-diameter annular steel bars.

[0013] In one embodiment of the above technical scheme, the elastic outer support rod member comprises a telescopic rod, inner and outer arc-shaped steel bars connected to the two ends of the telescopic rod respectively, the telescopic rod comprises a sleeve rod, a large-diameter spring, a plug rod and a small-diameter spring, one end of the sleeve rod is closed, the large-diameter spring is arranged in the sleeve rod, the small-diameter spring is sleeved on the plug rod, the plug rod is inserted into the other end of the sleeve rod, a guide plate is arranged on the insertion end of the plug rod, a plug rod mounting hole is arranged on the closing plate of the insertion end of the sleeve rod, and connecting columns are symmetrically arranged at the ends of the sleeve rod and the plug rod and located on the central axis, the ends of the connecting columns are perpendicularly connected to small arc-shaped plates, the outer sides of the two small arc-shaped plates are respectively welded and fixed to the inner and outer arc-shaped steel bars, and the inner and outer arc-shaped steel bars are respectively fixed to the small-diameter annular steel bars and the large-diameter annular steel bars through fasteners.

[0014] In the second embodiment of the above technical scheme, the elastic support assembly comprises a cross-shaped plate frame and four elliptical steel bar members connected between the cross-shaped plate frame and the large-diameter annular steel bars.

[0015] In the second embodiment of the above technical scheme, the cross-shaped plate frame comprises a central plate and radial plates, the central plate has a circular hole in the center and an octagonal outer edge, the radial plates have an eight-shaped planar shape, and the inner ends of the four radial plates are symmetrically fixed to two pairs of side edges of the outer edge of the central plate; the elliptical steel bar member comprises a rectangular plate, an outer convex arc-shaped steel bar and two arc-shaped steel bars symmetrically connected between the rectangular plate and the outer convex arc-shaped steel bar; the rectangular plates of the four elliptical steel bar members are symmetrically welded to the other two pairs of side edges of the outer edge of the central plate, and the outer convex arc-shaped steel bar is fixedly connected to the large-diameter annular steel bar through fasteners.

[0016] In the third embodiment of the above technical scheme, the central column is a square steel pipe.

[0017] In the third implementation of the above technical solution, the overall shape of the elastic support assembly is a horizontally arranged T-shaped member, and one elastic support assembly is connected between each of the four side walls of the center column and the large-diameter annular steel strip.

[0018] In the third implementation of the above technical solution, the T-shaped member includes a rectangular plate, an inner concave arc-shaped steel strip, and two arc-shaped steel strips symmetrically connected therebetween, the rectangular plate is connected and fixed with the side wall of the center pipe through fasteners, and the two ends of the inner concave arc-shaped steel strip are welded and fixed with the large-diameter annular steel strip.

[0019] According to force analysis, under the action of horizontal shear force of earthquake, the axial force, shear force and bending moment of the column bottom of the square steel pipe concrete column are the largest, and the bottom of the steel pipe column is prone to buckling failure. The cylindrical tensile energy dissipation assembly is arranged in the bottom of the square steel pipe column, the elastic support assembly is connected between the steel shell of the cylindrical tensile energy dissipation assembly and the center column, that is, the steel shell and the elastic support assembly are in a tensile structure, the elastic support assembly restrains the deformation of the steel shell through its own deformation, the steel shell is connected with the square steel pipe column through fasteners, the stiffness of the bottom of the square steel pipe column is improved, the yield deformation of the bottom of the steel pipe column is maintained within a certain range, and buckling failure is avoided. At the same time, the cylindrical tensile energy dissipation assembly can limit the inward or outward yield of the steel pipe, and can effectively cope with various possible stress forms of the square steel pipe column under the action of earthquake. In addition, the cylindrical tensile energy dissipation assembly can reset the steel pipe column through self-resetting after the earthquake. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the outer shape schematic diagram of the composite steel pipe concrete column in the application.

[0021] Figure 2 is the axonometric structure schematic diagram of the cylindrical tensile energy dissipation assembly in embodiment one of the application (the T-shaped connecting head at both ends of the telescopic rod of the outer support rod member is not shown).

[0022] Figure 3 is the top view schematic diagram of embodiment one (the T-shaped connecting head at both ends of the telescopic rod of the outer support rod member is not shown).

[0023] Figure 4 is Figure 3 is the enlarged schematic diagram of the section view of the telescopic rod.

[0024] Figure 5 is the axonometric structure schematic diagram of the cylindrical tensile energy dissipation assembly in embodiment two of the application.

[0025] Figure 6 is the top view schematic diagram of embodiment two.

[0026] Figure 7 is the axonometric structure schematic diagram of the cylindrical tensile energy dissipation assembly in embodiment three of the application.

[0027] Figure 8 is a top view schematic diagram of the example three. DETAILED DESCRIPTION

[0028] As Figure 1 shown, the double steel pipe concrete column with built-in energy dissipation component disclosed by the present application comprises a square steel pipe column FG and a cylindrical tension and compression energy dissipation component at the bottom of the inner cavity of the square steel pipe column FG, and after the cylindrical tension and compression energy dissipation component is connected and fixed with the square steel pipe column through fasteners, concrete is poured into the square steel pipe column.

[0029] The cylindrical tension and compression energy dissipation component comprises an outer shell, a center column and an elastic support component connected between the outer shell and the center column. Figure 2 、 Figure 5 and Figure 8 As can be seen, the outer shell comprises two large-diameter annular steel strips 1 arranged in vertical opposition and a plurality of arc-shaped axial steel strips fixed along the circumferences of the upper annular steel strip and the lower annular steel strip, and the center column and the support component can adopt different structural forms.

[0030] Example one, in combination Figures 2 to 4 As can be seen, in this embodiment, the center column 3 is a circular steel pipe. The elastic support component comprises a small-diameter annular steel strip 4, an inner support rod 5 connected between the small-diameter annular steel strip 4 and the center column 3, and an elastic outer support rod member connected between the large-diameter annular steel strip 1.

[0031] The elastic outer support rod member comprises a telescopic rod 6 and an inner arc-shaped steel strip 7 and an outer arc-shaped steel strip 8 connected at both ends of the telescopic rod 6, respectively. The telescopic rod 6 comprises a sleeve rod 61, a large-diameter spring 62, a plug rod 63 and a small-diameter spring 64. One end of the sleeve rod 61 is sealed, the large-diameter spring 62 is arranged in the sleeve rod, the small-diameter spring 64 is sleeved on the plug rod 63, the plug rod is inserted from the other end of the sleeve rod, a guide plate is arranged on the insertion end of the plug rod, a plug rod mounting hole is arranged on the sealing plate of the insertion end of the sleeve rod 61, and a connecting column 65 is symmetrically arranged at the end of the sleeve rod 61 and the plug rod 63 on the center axis. The end of the connecting column is connected perpendicularly to a small arc-shaped plate 66, and the connecting column and the small arc-shaped plate form a T-shaped connecting head.

[0032] The assembly process of the cylindrical tension and compression energy dissipation component is as follows:

[0033] Weld the two ends of each axial steel strip to the large-diameter annular steel strip to form an outer shell integral part; and weld the center column, the inner support rod and the small-diameter annular steel strip to form an I-shaped integral part.

[0034] The inner end of the elastic outer support rod member is connected and fixed with the small-diameter annular steel strip of the I-shaped integral part through fasteners.

[0035] The I-shaped whole piece connected with the small-diameter annular steel strip is placed in the shell, and the outer arc-shaped steel strip of each elastic outer support rod component is ensured to be attached to the inner wall of the large-diameter annular steel strip, but the outer arc-shaped steel strip is not fixed with the large-diameter annular steel strip.

[0036] When the cylindrical tension-compression energy dissipation assembly is assembled with the square steel pipe column, the shell whole piece is first placed at the bottom of the square steel pipe column, the shell and the inner wall of the square steel pipe column are in small gap fit, then the I-shaped whole piece is placed in the shell whole piece, the center column is located at the axial center of the shell whole piece, then the outer arc-shaped steel strip of each outer support rod component is connected and fixed with the large-diameter annular steel strip and the square steel pipe column through fasteners, and the axial steel strip of the shell whole piece is connected and fixed with the square steel pipe column through fasteners.

[0037] Embodiment two, in combination Figure 5 , Figure 6 As can be seen, in this embodiment, the center column 3 is a circular steel pipe, and the elastic support assembly includes a cross-shaped plate frame 9 and four elliptical steel strip components 10 connected between the cross-shaped plate frame 9 and the large-diameter annular steel strip 1.

[0038] The cross-shaped plate frame 9 includes a center plate 91 and radial plates 92, the center plate has a circular hole at the center and an octagonal outer side edge, and the radial plates have an eight-shaped plane shape, and the inner ends of the four radial plates are symmetrically fixed to two pairs of side edges of the outer side edge of the center plate.

[0039] The elliptical steel strip component 10 includes a rectangular plate 101, an outer convex arc-shaped plate 102, and two arc-shaped steel strips 103 symmetrically connected between the rectangular plate 101 and the outer convex arc-shaped plate 102.

[0040] The rectangular plates 10 of the four elliptical steel strip components are symmetrically welded to the other two pairs of side edges of the outer side edge of the center plate, and the outer convex arc-shaped plates 11 are attached and fixed with the large-diameter annular steel strip 1 through fasteners.

[0041] Embodiment three, in combination Figure 7 , Figure 8 As can be seen, in this embodiment, the center column 3 is a square steel pipe, and the elastic support assembly has a whole shape of a horizontally arranged T-shaped component, and one T-shaped component is connected between each of the four side walls of the center column and the large-diameter annular steel strip 1. The T-shaped component includes a rectangular plate 11, an inner concave arc-shaped steel strip 12, and two arc-shaped steel strips 13 symmetrically connected between the rectangular plate 11 and the inner concave arc-shaped steel strip 12, the rectangular plate is connected and fixed with the side wall of the center pipe 3 through fasteners, and the two ends of the inner concave arc-shaped steel strip 12 are welded and fixed with the large-diameter annular steel strip 1.

[0042] According to stress analysis, under the action of horizontal shear force of earthquake, the maximum axial force, shear force and bending moment of the square steel pipe concrete column are at the bottom of the column, and the bottom of the steel pipe column is prone to buckling failure. The bottom of the square steel pipe column is internally provided with a cylindrical tensile energy dissipation assembly, the steel strip shell of the cylindrical tensile energy dissipation assembly is connected with the central column through an elastic support assembly, that is, the steel strip shell and the elastic support assembly are in a tensile structure, the elastic support assembly restrains the deformation of the steel strip shell through the deformation of the elastic support assembly, the steel strip shell is connected with the square steel pipe column through fasteners, the bottom stiffness of the square steel pipe column is improved, the yield deformation of the bottom of the steel pipe column is maintained within a certain range, and buckling failure is avoided. Meanwhile, the cylindrical tensile energy dissipation assembly can limit the inward or outward yield of the steel pipe, and can effectively cope with various possible stress forms of the square steel pipe column under the action of earthquake. In addition, the cylindrical tensile energy dissipation assembly can reset the steel pipe column through tensile self-resetting after the earthquake.

[0043] All fasteners are high-strength bolts and their matching high-strength nuts.

Claims

1. A composite steel tube filled with concrete column with embedded energy dissipation component, characterized by: It comprises a square steel pipe column and a cylindrical opposite-pulling energy dissipation component arranged in the bottom of the square steel pipe column, the cylindrical opposite-pulling energy dissipation component comprising a steel strip shell, a center column and an elastic support component connected between the steel strip shell and the center column. The elastic support component comprises a small-diameter annular steel strip, an inner support rod connected between the small-diameter annular steel strip and the center column, and an elastic outer support rod member connected between the small-diameter annular steel strip and a large-diameter annular steel strip. The elastic outer support rod member comprises a telescopic rod, an inner arc-shaped steel strip and an outer arc-shaped steel strip connected to two ends of the telescopic rod respectively, the telescopic rod comprising a sleeve rod, a large-diameter spring, a plug rod and a small-diameter spring, one end of the sleeve rod being sealed, the large-diameter spring being arranged in the sleeve rod, the small-diameter spring being sleeved on the plug rod, the plug rod being inserted into the other end of the sleeve rod, a guide plate being arranged on the insertion end of the plug rod, a plug rod mounting hole being arranged on the sealing plate of the insertion end of the sleeve rod, and a connecting column being symmetrically arranged on the center axis at the ends of the sleeve rod and the plug rod, the connecting column being perpendicularly connected to the small arc-shaped steel strips, the outer sides of the two small arc-shaped steel strips being welded and fixed to the inner arc-shaped steel strip and the outer arc-shaped steel strip respectively, and the inner arc-shaped steel strip and the outer arc-shaped steel strip being fixed to the small-diameter annular steel strip and the large-diameter annular steel strip by fasteners.

2. The composite steel tube filled with concrete column with built-in energy dissipation components according to claim 1, characterized in that: The steel strip shell comprises large-diameter annular steel strips and axial steel strips, the two large-diameter annular steel strips being arranged in an opposite manner, and the plurality of axial steel strips with circular arc cross sections being uniformly fixed along the circumferences of the upper annular steel strip and the lower annular steel strip.

3. The composite steel tube filled with concrete column with built-in energy dissipation components as claimed in claim 2, wherein: The center column is a circular steel pipe.

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