Corrugated plate self-resetting device suitable for concrete filled steel tube latticed column

Abstract

The utility model discloses a corrugated plate self-resetting device suitable for a concrete filled steel tube latticed column, which comprises concrete filled steel tube column limbs, horizontal batten tubes and corrugated plate self-resetting devices, and the horizontal batten tubes and the corrugated plate self-resetting devices are alternately arranged between the two concrete filled steel tube column limbs; the corrugated plate self-resetting device is composed of a lug plate pair, a cover plate pair, a disc spring set, a split bolt set, a polytetrafluoroethylene plate and a viscoelastic plate. Under the action of a horizontal force earthquake, the concrete-filled steel tube column limb laterally moves to drive the lug plates to move up and down, the upper cover plate and the lower cover plate are pushed to be opened in the front-back direction through the meshing action of the corrugated plates on the lug plates and the corrugated plates on the cover plates, the disc spring sets on the split bolts are compressed to generate reset force, the upper cover plate and the lower cover plate are reversely extruded, and the lug plates and the concrete-filled steel tube column limb are pushed to reset. By means of the corrugated plate self-resetting device, earthquake residual deformation of the long and thin steel pipe concrete latticed column can be eliminated, stiffness mutation of a traditional tooth-shaped plate resetting device at the initial position is avoided, and the problem that the long and thin steel pipe concrete latticed column is insufficient in seismic toughness during an earthquake is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of structural engineering, and particularly relates to a corrugated plate self-resetting device suitable for a steel pipe concrete lattice column. TECHNICAL BACKGROUND

[0002] With the continuous improvement of building quality, the demand for high and large space is also increasing. The steel pipe concrete lattice column with flat-tube steel pipe has good application prospects in these scenarios due to its slender shape and excellent seismic performance. In recent years, research on the seismic mechanism of the flat-tube steel pipe concrete lattice column shows that the flat-tube steel pipe does not directly bear the vertical load, and the linear stiffness is much lower than that of the steel pipe concrete column limb. Under the action of the earthquake, the flat-tube steel pipe yields first to dissipate the seismic energy and protect the steel pipe concrete column limb, which can significantly improve the ductility and energy dissipation capacity of the steel pipe concrete lattice column. However, the use of the flat-tube steel pipe to improve the energy dissipation capacity of the steel pipe concrete lattice column also brings the problem of large residual deformation of the component, which makes the repair difficult and does not meet the requirements of the seismic ductility structure. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the present application provides a corrugated plate self-resetting device suitable for a steel pipe concrete lattice column, which is used to solve the problem of insufficient seismic ductility of the steel pipe concrete lattice column in the prior art, and the large residual deformation after the earthquake leads to difficult repair.

[0004] The specific method is as follows:

[0005] A corrugated plate self-resetting device suitable for a steel pipe concrete lattice column, comprising a steel pipe concrete column limb, a flat-tube steel pipe and a corrugated plate self-resetting device, the steel pipe concrete column limb has a plurality of steel pipe concrete column limbs, and the flat-tube steel pipe and the corrugated plate self-resetting device are arranged alternately between adjacent two steel pipe concrete column limbs along the column height direction; the corrugated plate self-resetting device is composed of an ear plate pair, a cover plate pair, a disc spring group, a pair of pull bolts, a Teflon plate and a viscoelastic plate, and is arranged along the column height direction and is preferentially arranged at a position far from the column end and having a large column limb displacement; the ear plate pair comprises right and left ear plates symmetrically arranged on the front and back sides of the viscoelastic plate, and the left and right ear plates are respectively welded to the steel pipe concrete column limbs on the left and right sides; the cover plate pair comprises front and rear cover plates arranged on the front side of the right ear plate and the rear side of the left ear plate, respectively; the Teflon plates are arranged between the right ear plate and the front cover plate and between the left ear plate and the rear cover plate; the pair of pull bolts comprises a plurality of pull bolts, the pull bolts penetrate the ear plate pair, the cover plate pair, the Teflon plate and the viscoelastic plate, and the two ends of the pull bolts respectively extend out of the front cover plate and the rear cover plate; and the disc spring group comprises disc springs arranged at the ends of the pull bolts.

[0006] Further, the left ear plate, the right ear plate, the front cover plate and the rear cover plate are vertically arranged strip plates, the front surface is a continuous wave surface, the back surface is a plane, the continuous wave surface comprises a straight line segment, a wave peak arc segment and a wave valley arc segment, the wave peak arc segment and the wave valley arc segment are arranged alternately, the straight line segment is arranged between the two adjacent wave peak arc segments and wave valley arc segments, and the radius of the wave peak arc segment is smaller than that of the wave valley arc segment; the left ear plate and the right ear plate are arranged back to back, the front cover plate and the rear cover plate are arranged face to face, and the four fluorine plates are wave-shaped plates matched with the ear plate pair and the cover plate pair, for reducing the friction force. When the column limb tilts and drives the ear plate pair to displace, the disc spring extrudes the cover plate pair, and the in-plane component of the extrusion force between the continuous wave surfaces of the ear plate pair and the cover plate pair pushes the column limb to reset, and the reset force is divided into two stages of arc segment extrusion and straight line segment extrusion.

[0007] Further, the number of waves of the continuous wave surface is not less than two, and the wave shapes of the continuous wave surfaces of the ear plate pair and the cover plate pair are conjugate, the upper and lower ends of the front cover plate and the rear cover plate respectively exceed the upper and lower ends of the right ear plate and the left ear plate, and are respectively provided with a front cover plate limiting end plate and a rear cover plate limiting end plate, the two sides of the front cover plate and the rear cover plate respectively exceed the two sides of the right ear plate and the left ear plate, and are respectively provided with a front cover plate side baffle and a rear cover plate side baffle, and gaps required for the dislocation displacement are respectively left between the front cover plate limiting end plate and the rear cover plate limiting end plate and the end portions of the right ear plate and the left ear plate.

[0008] Further, a plurality of long circular bolt holes corresponding in position are arranged on the ear plate pair, the four fluorine plates and the viscoelastic plate, and a plurality of circular bolt holes corresponding in position are arranged on the cover plate pair. The bolt passes through the bolt holes on the disc spring group, the front cover plate, the rear cover plate and the left and right ear plates, and applies the pre-tightening force required for resetting, while leaving the required deformation amount for the disc spring.

[0009] Further, the column limb of the steel pipe concrete lattice column is two or four.

[0010] Under the horizontal seismic action, the steel pipe concrete column limb tilts, drives the left and right ear plates to dislocate upward and downward, and extrudes the continuous wave surfaces on the front and rear cover plates through the continuous wave surfaces. The upward and downward displacements of the front and rear cover plates are limited by the front and rear cover plate limiting end plates, and the front and rear cover plates are opened in the front and rear directions under the action of the extrusion force, and press the disc spring group on the bolt group, to generate the reset force for extruding the front and rear cover plates, and push the ear plate and the column limb to reset. When the dislocation displacement is small, the continuous wave surfaces of the left and right ear plates engage with the wave peak arc segments and the wave valley arc segments of the continuous wave surfaces of the front and rear cover plates, and the reset force gradually increases with the increase of the dislocation displacement. When the dislocation displacement is large, the continuous wave surfaces of the left and right ear plates engage with the straight line segments of the continuous wave surfaces of the front and rear cover plates, and the reset force is large and basically constant. The reset force size matches the dislocation displacement amount, and under the reciprocating action of the earthquake, the reset force will not be suddenly changed.

[0011] The corrugated plate self-resetting device is connected to the column limb only through left and right ear plates, making installation simple. The front and rear cover plates also serve as the outer shell of the node area, providing protection for the complex internal structure. The corrugated plate self-resetting device has a compact structure and is suitable for slender steel-tube concrete lattice columns with small column limb spacing. After installing the corrugated plate self-resetting device, the residual seismic deformation of slender steel-tube concrete lattice columns can be eliminated, solving the problem of insufficient seismic toughness of slender steel-tube concrete lattice columns during earthquakes.

[0012] The present invention has the following beneficial effects:

[0013] This invention solves the problem of excessive residual deformation of slender, flat-jointed tubular lattice columns after earthquakes. The inclination angle of the straight section of the corrugated plate and the compressive force of the disc springs can be adjusted over a wide range. By rationally designing based on the yield strength of the steel-concrete lattice column, the residual deformation of the steel-concrete lattice column after an earthquake can be eliminated.

[0014] The continuous waveform surface of the present invention is composed of straight segments and arc segments. When the lateral displacement of the column is large, the extrusion force of the straight segments generates a large restoring force, and when the lateral displacement of the column is small, the extrusion force of the arc segments generates a small restoring force, thus solving the problem of mismatch between the restoring force and the lateral displacement of the column under reciprocating load.

[0015] The self-resetting corrugated plate device of this invention is connected to the column members only through left and right ear plates, and its small size makes it easy to install between the columns of slender steel tube concrete lattice columns in confined spaces. The front and rear cover plates also serve as the outer shell of the node area, providing protection for the complex internal structure, reducing later maintenance costs, and the structure is compact and saves on material usage. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a corrugated plate self-resetting device suitable for steel-concrete composite lattice columns provided by the present invention;

[0017] Figure 2 for Figure 1 The diagram shows an exploded view of the components of the self-resetting device.

[0018] Figure 3 for Figure 2 The diagram shows the front and rear cover plate structures.

[0019] Figure 4 for Figure 2 The diagram shows the left and right ear plate structures.

[0020] Figure 5 for Figure 2 The diagram shows the structure of the disc spring assembly.

[0021] Figure 6 for Figure 3 , Figure 4 A schematic diagram of the continuous waveform surface of the cover plate and ear plate shown.

[0022] In the figure: 1. Concrete-filled steel tube column limb; 2. Flat tube; 3. Wave-shaped plate self-resetting device; 4. Left ear plate; 5. Right ear plate; 6. Front cover plate; 7. Rear cover plate; 8. Disc spring; 9. Opposite pull bolt; 10. Tetrafluoro plate; 11. Viscoelastic plate; 12. Long circular opposite pull bolt hole; 13. Circular opposite pull bolt hole; 4-1. Straight line segment; 4-2. Wave peak arc segment; 4-3. Wave trough arc segment; 6-1. Front cover plate side baffle; 6-2. Front cover plate limiting end plate; 7-1. Rear cover plate side baffle; 7-2. Rear cover plate limiting end plate. DETAILED DESCRIPTION

[0023] The implementation of the present application is illustrated by specific embodiments below, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification.

[0024] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to understand and read the disclosure of the present specification by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, and therefore do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "front" and "rear" used in the present specification are only for the convenience of clear description, and are not used to limit the scope of the implementation of the present application. The change or adjustment of the relative relationship, without substantial change of the technical content, is also considered as the implementation scope of the present application.

[0025] The specific embodiments of the present application are further described below. Figures 1 to 5 The specific embodiments of the present application are further described below.

[0026] The application provides a corrugated plate self-resetting device suitable for a steel pipe concrete lattice column, which comprises steel pipe concrete column limbs 1, flat pipe 2 and corrugated plate self-resetting device 3, the steel pipe concrete column limbs 1 are multiple, and the flat pipe 2 and the corrugated plate self-resetting device 3 are alternately arranged between adjacent two steel pipe concrete column limbs 1 along the column height direction; the corrugated plate self-resetting device 3 is composed of an ear plate pair, a cover plate pair, a disc spring group, a pair of pull bolts, a tetrafluoro plate 10 and a viscoelastic plate 11, is arranged along the column height direction, and is preferentially arranged at a position far from the column end and having a large column limb displacement; the ear plate pair comprises right ear plates 5 and left ear plates 4 symmetrically arranged on the front and back sides of the viscoelastic plate 11, and the left ear plates 4 and the right ear plates 5 are respectively welded with the steel pipe concrete column limbs 1 on the left side and the right side; the cover plate pair comprises front cover plates 6 and rear cover plates 7 respectively arranged on the front side of the right ear plates 5 and the rear side of the left ear plates 4; the tetrafluoro plates 10 are arranged between the right ear plates 5 and the front cover plates 6 and between the left ear plates 4 and the rear cover plates 7; the pair of pull bolts 9 comprises multiple pairs of pull bolts 9, the pairs of pull bolts 9 penetrate the ear plate pair, the cover plate pair, the tetrafluoro plate 10 and the viscoelastic plate 11, and the two ends of the pairs of pull bolts 9 respectively extend out of the front cover plates 6 and the rear cover plates 7; and the disc spring group comprises disc springs 8 arranged at the ends of the pairs of pull bolts 9.

[0027] In the embodiment, the left ear plates 4, the right ear plates 5, the front cover plates 6 and the rear cover plates 7 are all vertically arranged strip plates, the front surface is a continuous wave surface, and the back surface is a plane; the continuous wave surface comprises a straight line segment 4-1, a wave peak arc line segment 4-2 and a wave valley arc line segment 4-3, the wave peak arc line segment 4-2 and the wave valley arc line segment 4-3 are alternately arranged, the straight line segment 4-1 is arranged between adjacent two wave peak arc line segments 4-2 and wave valley arc line segments 4-3, the radius of the wave peak arc line segment 4-2 is smaller than that of the wave valley arc line segment 4-3, the left ear plates 4 and the right ear plates 5 are arranged back to back, and the front cover plates 6 and the rear cover plates 7 are arranged face to face; the tetrafluoro plate 10 is a wave plate matched with the ear plate pair and the cover plate pair, and is used for reducing friction; when the column limb side inclination drives the ear plate pair to displace, the disc spring extrudes the cover plate pair, and the in-plane component of the extrusion force between the continuous wave surfaces of the ear plate pair and the cover plate pair pushes the column limb to reset, and the reset force is divided into two stages of arc line segment extrusion and straight line segment extrusion.

[0028] In the embodiment, the number of waves of the continuous wave surface is not less than two, and the wave shapes of the continuous wave surfaces of the ear plate pair and the cover plate pair are conjugate; the upper and lower ends of the front cover plates 6 and the rear cover plates 7 respectively exceed the upper and lower ends of the right ear plates 5 and the left ear plates 4, and are respectively provided with front cover plate limiting end plates 6-2 and rear cover plate limiting end plates 7-2; the two sides of the front cover plates 6 and the rear cover plates 7 respectively exceed the two sides of the right ear plates 5 and the left ear plates 4, and are respectively provided with front cover plate side stop plates 6-1 and rear cover plate side stop plates 7-1; and the front cover plate limiting end plates 6-2 and the rear cover plate limiting end plates 7-2 respectively leave gaps required by displacement between the end portions of the right ear plates 5 and the left ear plates 4.

[0029] In the embodiment, the ear plate pair, the tetrafluoroethylene plate 10 and the viscoelastic plate 11 are arranged with a plurality of long circular bolt holes 12 corresponding to positions, and the cover plate pair is provided with a circular bolt hole 13 corresponding to the long circular bolt hole 12 in number and position. The bolt passes through the bolt hole on the disc spring group, the front and rear cover plates and the left and right ear plates, and applies the required pre-tightening force for resetting, while leaving the required deformation amount for the disc spring.

[0030] In the embodiment, the steel pipe concrete lattice column stem 1 is 2 or 4.

[0031] Under the action of horizontal earthquake, the steel pipe concrete column stem tilts, drives the left and right ear plates to move up and down, and extrudes the continuous wave surfaces on the front and rear cover plates through the continuous wave surfaces. The up and down displacement of the front and rear cover plates is limited by the limiting end plates of the front and rear cover plates, and is opened in the front and rear directions under the action of extrusion force, compresses the disc spring group on the tension bolt group, generates the resetting force for extruding the front and rear cover plates, and pushes the ear plate and the column stem to reset. When the displacement is small, the continuous wave surfaces of the left and right ear plates engage with the peak and valley arc segments of the continuous wave surfaces of the front and rear cover plates, and the resetting force gradually increases with the increase of the displacement. When the displacement is large, the continuous wave surfaces of the left and right ear plates engage with the straight line segments of the continuous wave surfaces of the front and rear cover plates, and the resetting force is large and basically constant. The resetting force is matched with the displacement, and under the action of earthquake, the resetting force will not be suddenly changed.

[0032] The wave plate self-resetting device in the application is connected only through the left and right ear plates between the column stems, and is simple to install. The front and rear cover plates serve as the shell of the joint area and protect the internal complex structure. The wave plate self-resetting device has compact structure and is suitable for slender steel pipe concrete lattice columns with small column stem spacing. After the wave plate self-resetting device is arranged, the seismic residual deformation of the slender steel pipe concrete lattice column can be eliminated, the problem of insufficient seismic toughness of the slender steel pipe concrete lattice column during earthquake can be solved, and the wave plate self-resetting device has good application prospect.

[0033] The technical means disclosed in the application is not limited to the technical means disclosed in the above embodiment, and includes the technical solutions composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled in the art, without departing from the principle of the application, some improvements and refinements can be made, and these improvements and refinements are also considered as the protection scope of the application.

Claims

1. A corrugated plate self-centering device suitable for a concrete-filled steel tubular lattice column, characterized in that: The application relates to a steel pipe concrete column limb (1), a flat pipe (2) and a corrugated plate self-resetting device (3), the steel pipe concrete column limb (1) has a plurality of steel pipe concrete column limbs, and the flat pipe (2) and the corrugated plate self-resetting device (3) are alternately arranged between adjacent two steel pipe concrete column limbs (1) along the column height direction; the corrugated plate self-resetting device (3) is composed of an ear plate pair, a cover plate pair, a disc spring group, a pair of pull bolts, a Teflon plate (10) and a viscoelastic plate (11); the ear plate pair comprises right ear plates (5) and left ear plates (4) which are symmetrically arranged on the front and back sides of the viscoelastic plate (11), the left ear plate (4) and the right ear plate (5) are respectively welded with the steel pipe concrete column limbs (1) located on the left side and the right side, the cover plate pair group comprises front cover plates (6) and rear cover plates (7) which are respectively arranged on the front side of the right ear plate (5) and the rear side of the left ear plate (4), the Teflon plate (10) is arranged between the right ear plate (5) and the front cover plate (6) and between the left ear plate (4) and the rear cover plate (7), the pair of pull bolts (9) comprises a plurality of pairs of pull bolts (9), the pair of pull bolts (9) penetrates through the ear plate pair, the cover plate pair, the Teflon plate (10) and the viscoelastic plate (11), and the two ends of the pair of pull bolts (9) respectively extend out of the front cover plate (6) and the rear cover plate (7), and the disc spring group comprises disc springs (8) arranged at the end of the pair of pull bolts (9).

2. The corrugated plate self-centering device for a concrete-filled steel tubular lattice column according to claim 1, characterized in that: The left ear plate (4), the right ear plate (5), the front cover plate (6) and the rear cover plate (7) are all vertically arranged strip plates, the front surface is a continuous wave surface, and the back surface is a plane, the continuous wave surface comprises a straight line segment (4-1), a wave peak arc line segment (4-2) and a wave valley arc line segment (4-3), the wave peak arc line segment (4-2) and the wave valley arc line segment (4-3) are alternately arranged, the straight line segment (4-1) is arranged between the adjacent two wave peak arc line segments (4-2) and wave valley arc line segments (4-3), the radius of the wave peak arc line segment (4-2) is smaller than that of the wave valley arc line segment (4-3), the left ear plate (4) and the right ear plate (5) are arranged back to back, the front cover plate (6) and the rear cover plate (7) are arranged face to face, and the Teflon plate (10) is a wave plate matched with the ear plate pair and the cover plate pair and used for reducing friction.

3. The corrugated plate self-centering device for a concrete-filled steel tubular lattice column according to claim 2, characterized in that: The number of waves of the continuous wave surface is not less than two, and the wave forms of the continuous wave surfaces of the ear plate pair and the cover plate pair are conjugate.

4. The corrugated plate self-centering device for a concrete-filled steel tubular lattice column according to claim 1, characterized in that: The upper and lower ends of the front cover plate (6) and the rear cover plate (7) respectively exceed the upper and lower ends of the right ear plate (5) and the left ear plate (4), and are respectively provided with a front cover plate limiting end plate (6-2) and a rear cover plate limiting end plate (7-2); the two sides of the front cover plate (6) and the rear cover plate (7) respectively exceed the two sides of the right ear plate (5) and the left ear plate (4), and are respectively provided with a front cover plate side baffle (6-1) and a rear cover plate side baffle (7-1); the front cover plate limiting end plate (6-2) and the rear cover plate limiting end plate (7-2) respectively leave a clearance required for dislocation displacement between the end portions of the right ear plate (5) and the left ear plate (4).

5. The corrugated plate self-centering device for a concrete-filled steel tubular lattice column according to claim 1, wherein: The ear plate pair, the Teflon plate (10) and the viscoelastic plate (11) are all arranged with a plurality of long circular pull bolt holes (12) corresponding in position, and the cover plate pair is provided with a plurality of circular pull bolt holes (13) corresponding in position and same in number with the long circular pull bolt holes (12).

6. The corrugated plate self-centering device for a concrete-filled steel tubular lattice column according to claim 1, wherein: The steel pipe concrete lattice column column limb (1) is 2 or 4.

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