Steel pipe damper

Abstract

The utility model discloses a steel tube damper which comprises two connecting pieces and an energy dissipation steel tube, and the two connecting pieces are oppositely arranged. The two ends of the energy dissipation steel pipe are fixedly connected with the two opposite sides of the two connecting pieces respectively, the energy dissipation steel pipe is provided with two first through holes, the two first through holes are symmetrically formed in the two sides of the energy dissipation steel pipe, and the distances from the centers of the first through holes to the two connecting pieces are equal in the direction of the central axis of the energy dissipation steel pipe. When the earthquake action is increased, stress is concentrated at the first through holes of the energy dissipation steel pipes, the energy dissipation steel pipes can bear tension, bending and shear composite deformation at the same time, all-directional energy dissipation capacity is achieved, the end portions of the damper steel pipes are protected, and the applicability of the steel pipe damper is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a steel pipe damper. Background Art

[0002] At present, in the field of wind and earthquake resistance engineering of buildings, the energy dissipation vibration (shock) reduction technology is generally used, that is, using energy dissipation vibration reduction devices to dissipate the energy input by wind vibration or earthquake to achieve the purpose of protecting the building structure. The energy dissipation vibration reduction device includes a metal damper that uses the elastic-plastic deformation of metal materials to dissipate energy, and the commonly used one is a steel pipe damper. The steel pipe damper has good ductility and bearing capacity and can provide a more ideal initial stiffness, but it has the disadvantage that the connection between the energy dissipation steel pipe and the connecting piece is easily damaged. When the building structure connected to the two ends of the damper produces relative displacement, it can be known from the knowledge of structural mechanics that the bending moment of the damper at the two ends is the largest and the bending moment in the middle is the smallest. However, from the knowledge of material mechanics, it is known that the yield moment of the cross section of the energy-absorbing steel pipe is M=(fyπD^3) / 32, where fy is the yield stress of the material and D is the outer diameter of the energy-absorbing steel pipe, that is, the yield moment of each cross section of the energy-absorbing steel pipe is equal. Therefore, when the two ends of the energy-absorbing steel pipe yield, the middle part of the energy-absorbing steel pipe will not yield, especially when accompanied by extrusion external loads, the middle part of the energy-absorbing steel pipe will still not yield and cannot play its energy-absorbing role. The existing technology uses a lead core to be set inside the energy-absorbing steel pipe, and a groove is set on the outer wall to enhance the yield capacity of the middle part, but this steel pipe damper has a complex structure and high design and processing difficulty. The groove structure is also difficult to adapt to complex external loads and does not have universal applicability. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a steel tube damper, which has a simple structure, is easy to manufacture, can withstand composite deformation in multiple directions at the same time, has an omnidirectional energy dissipation capacity, and effectively improves the applicability of the steel tube damper.

[0004] According to an embodiment of the utility model, a steel tube damper includes two connecting parts and an energy-absorbing steel tube, wherein the two connecting parts are arranged opposite to each other; the two ends of the energy-absorbing steel tube are respectively fixedly connected to the opposite sides of the two connecting parts, and the energy-absorbing steel tube is provided with two first through holes, which are symmetrically arranged on both sides of the energy-absorbing steel tube, and along the direction of the central axis of the energy-absorbing steel tube, the distance from the center of the first through hole to the two connecting parts is equal.

[0005] A steel tube damper according to an embodiment of the utility model has at least the following beneficial effects: when the seismic effect is small, the steel tube damper is in an elastic state, providing additional stiffness and bearing capacity for the structure; when the seismic effect increases, the energy-absorbing steel tube enters a yield state, and the middle part of the energy-absorbing steel tube is weakened by opening a hole, and the stress is concentrated at the first through hole of the energy-absorbing steel tube, so that the energy-absorbing steel tube can simultaneously withstand the composite deformation of tension, bending and shearing, has the ability to absorb energy in all directions, plays a protective role on the end of the damper steel tube, and effectively improves the applicability of the steel tube damper.

[0006] According to some embodiments of the present invention, the connection direction of the two first through holes is parallel to the shear force loading direction of the energy-absorbing steel pipe.

[0007] According to some embodiments of the present invention, the ratio of the maximum inner diameter of the first through hole to the outer diameter of the energy-absorbing steel pipe does not exceed 0.24.

[0008] According to some embodiments of the present utility model, the energy-absorbing steel pipe is provided with a plurality of second through holes, and the plurality of second through holes and the two first through holes are arranged at intervals along the circumference of the energy-absorbing steel pipe.

[0009] According to some embodiments of the present invention, the first through hole and the second through hole are circular holes with equal inner diameters, the inner diameter of the first through hole is d, and the outer diameter of the energy-absorbing steel pipe is D, satisfying: 0.08≤d / D≤0.16.

[0010] According to some embodiments of the present invention, the first through hole is a strip-shaped hole, and the strip-shaped hole is arranged along the direction of the central axis of the energy-absorbing steel pipe.

[0011] According to some embodiments of the present invention, the length of the strip hole is l, the width of the strip hole is w, the height of the energy-absorbing steel pipe is H, and the outer diameter of the energy-absorbing steel pipe is D, satisfying: 0<l / H≤0.1 and 0<w / D≤0.08.

[0012] According to some embodiments of the present invention, the inner wall of the strip-shaped hole is transitioned through a rounded corner.

[0013] According to some embodiments of the utility model, a fillet weld is provided between the energy-absorbing steel pipe and the connecting piece, and the fillet weld is arranged around the outer wall of the energy-absorbing steel pipe and is respectively welded and fixed to the energy-absorbing steel pipe and the connecting piece.

[0014] According to some embodiments of the utility model, the connecting piece is provided with a positioning groove, and the end of the energy-absorbing steel pipe is snap-fitted with the positioning groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic structural diagram of a steel pipe damper according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the connecting piece of an embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a steel tube damper according to a first embodiment of the utility model;

[0020] Figure 4 It is a front view of a tube damper according to a second embodiment of the utility model;

[0021] Figure 5 It is a cross-sectional view of a tube damper according to a second embodiment of the present invention.

[0022] Reference numerals: connector 100 ; positioning groove 110 ; mounting hole 120 ; energy-absorbing steel pipe 200 ; first through hole 210 ; second through hole 220 ; fillet weld 230 . DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the utility model, unless otherwise clearly defined, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the technical personnel in the relevant technical field can reasonably determine the specific meaning of the above words in the utility model in combination with the specific content of the technical solution. In the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0027] Reference Figure 1 As shown, an embodiment of the utility model provides a steel pipe damper, including two connecting members 100 and an energy-absorbing steel pipe 200, the two connecting members 100 are arranged opposite to each other; the connecting member 100 is a flat plate body, and a plurality of mounting holes 120 are provided on the connecting member 100, the mounting holes 120 are through holes or threaded holes that pass through the plate body, and the plurality of mounting holes 120 are arranged at intervals along the circumference of the connecting member 100, and the connecting member 100 is connected to the building through the mounting holes 120.

[0028] It should be noted that the shape of the plate is usually a circle or square with a simple structure and convenient processing. Users can also choose other suitable shapes according to actual needs, which will not be repeated here. The energy-consuming steel pipe 200 can be a stainless steel pipe, a common carbon steel pipe or a copper pipe.

[0029] Specifically, when the energy-consuming steel pipe 200 is a stainless steel pipe, it has the advantages of a smaller elastic modulus, a lower proportional limit (generally, the proportional limit is about 36% to 60% of the yield strength, which is less than the proportional limit of about 75% of the yield strength of ordinary structural steel), and better ductility. The strength of stainless steel pipes is usually higher than that of ordinary structural steel, and the ratio of tensile strength to yield strength is also significantly higher than that of ordinary structural steel. It has good corrosion resistance and durability, thereby effectively extending the service life of the energy-consuming steel pipe 200.

[0030] When the energy-absorbing steel pipe 200 is a copper pipe, it has the advantages of good mechanical properties, high compressive strength, good toughness, high ductility, excellent earthquake resistance, impact resistance and fatigue resistance, and the copper pipe is heat-resistant, cold-resistant, corrosion-resistant and fire-resistant, which effectively improves the safety and reliability of the energy-absorbing steel pipe 200.

[0031] The two ends of the energy-absorbing steel pipe 200 are fixedly connected to the two opposite sides of the two connecting pieces 100 respectively. The energy-absorbing steel pipe 200 is provided with two first through holes 210. The two first through holes 210 are symmetrically arranged on both sides of the energy-absorbing steel pipe 200. Along the direction of the central axis of the energy-absorbing steel pipe 200, the distances from the center of the first through hole 210 to the two connecting pieces 100 are equal, that is, the first through hole 210 is located in the middle position of the energy-absorbing steel pipe 200, so that after the two ends of the energy-absorbing steel pipe 200 are connected to the connecting pieces 100, the steel pipe damper has symmetry, ensuring that the steel pipe damper can evenly load the loads at both ends when working.

[0032] Among them, the connection direction of the two first through holes 210 is parallel to the shear force loading direction of the energy-absorbing steel pipe 200. Specifically, before the steel pipe damper is assembled (in this embodiment, the steel pipe damper is installed vertically, which is specially explained here and will not be repeated hereafter), the direction of relative movement between the two buildings to be connected during an earthquake will be determined first, and then the orientation of the two first through holes 210 will be determined according to this direction. For example, during an earthquake, the buildings at both ends of the energy-absorbing steel pipe 200 are relatively displaced in the left-right direction, so that the energy-absorbing steel pipe 200 mainly bears the shear force in the left-right direction, and the two first through holes 210 are arranged in the left-right direction. If during an earthquake, the buildings at both ends of the energy-absorbing steel pipe 200 are relatively displaced mainly in the front-to-back direction, so that the energy-absorbing steel pipe 200 mainly bears the shear force in the front-to-back direction, the two first through holes 210 are arranged in the front-to-back direction, so as to ensure that after the steel pipe damper is assembled, the two first through holes 210 are always symmetrically arranged along the shear force loading direction of the energy-absorbing steel pipe 200.

[0033] The user can select a suitable installation direction of the steel pipe damper according to actual needs, so that the connection direction of the two first through holes 210 is parallel to the shear force loading direction of the energy-absorbing steel pipe 200. In this way, the shear force is concentrated at the first through hole 210, ensuring that the energy-absorbing steel pipe 200 mainly undergoes plastic hysteresis deformation at the first through hole 210 to dissipate the seismic energy, giving full play to the protective function of the first through hole 210, and effectively improving the structural rationality of the first through hole 210.

[0034] Furthermore, the ratio of the maximum inner diameter of the first through hole 210 to the outer diameter of the energy-absorbing steel pipe 200 does not exceed 0.24. The force modes are different for different shear action directions, so the aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200 is also different. Specifically, the inner diameter of the first through hole 210 is d, and the outer diameter of the energy-absorbing steel pipe 200 is D. When the two first through holes 210 are arranged in the front-to-back direction, the aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200 is between 0.08 and 0.20 (i.e., 0.08≤d / D≤0.20). When the two first through holes 210 are arranged in the left-right direction, the aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200 is between 0.16 and 0.24 (i.e., 0.16≤d / D≤0.24).

[0035] By reasonably limiting the aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200, on the one hand, it is possible to avoid the problem that the inner diameter of the first through hole 210 is too small, which limits the ability of the energy-absorbing steel pipe 200 to plastically deform, resulting in weakened damping effect and reduced load capacity of the energy-absorbing steel pipe 200. On the other hand, it is possible to avoid the problem that the inner diameter of the first through hole 210 is too large and there is less material in the middle of the energy-absorbing steel pipe 200, resulting in low strength and weak recovery ability of the energy-absorbing steel pipe 200.

[0036] The user can set a suitable aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200 according to the actual installation orientation. There is no specific limitation on the aperture ratio of the first through hole 210 and the energy-absorbing steel pipe 200. It is sufficient as long as the structural strength and the seismic damping effect of the energy-absorbing steel pipe 200 are taken into account to ensure the stability of the steel pipe damper structure.

[0037] Reference Figure 2 and Figure 3 As shown, it can be understood that a positioning groove 110 is provided at the center of the square or circular connecting piece 100 , and the end of the energy-absorbing steel pipe 200 is snap-fitted with the positioning groove 110 .

[0038] By providing the positioning groove 110 , the energy-absorbing steel pipe 200 can be preliminarily positioned, which is convenient for the user to further fix the energy-absorbing steel pipe 200 , and effectively improves the assembly convenience of the steel pipe damper.

[0039] Furthermore, a fillet weld 230 is provided between the energy-absorbing steel pipe 200 and the connecting piece 100 . The fillet weld 230 is provided around the outer wall of the energy-absorbing steel pipe 200 and is welded and fixed to the energy-absorbing steel pipe 200 and the connecting piece 100 , respectively.

[0040] The energy-absorbing steel pipe 200 is fixed by welding to the end surface of the connecting piece 100 through the fillet weld 230 , which can effectively improve the installation stability of the energy-absorbing steel pipe 200 .

[0041] It can be understood that when the earthquake action is small, the steel tube damper is in an elastic state, providing additional stiffness and bearing capacity for the structure; when the earthquake action increases, the energy-absorbing steel tube 200 enters a yield state, and the middle part of the energy-absorbing steel tube 200 is weakened by openings, so that the yield bending moment of the cross section in the middle part of the energy-absorbing steel tube 200 is minimized, and gradually increases toward both ends, corresponding to the bending moment distribution when the connecting buildings at both ends of the steel tube damper produce relative displacement, and the various components of the open-hole steel tube damper are fixedly connected, so that the working performance inside and outside the damper is stable, and the stress is concentrated at the first through hole 210 of the energy-absorbing steel tube 200, so that the energy-absorbing steel tube 200 can simultaneously withstand tension, bending, and shear composite deformation, has anisotropic energy absorption capacity, plays a protective role on the damper steel tube end, and effectively improves the applicability of the steel tube damper.

[0042] Reference Figure 1 and Figure 3 As shown, it can be understood that the energy-absorbing steel pipe 200 is provided with a plurality of second through holes 220 , and the plurality of second through holes 220 and the two first through holes 210 are arranged at intervals along the circumference of the energy-absorbing steel pipe 200 , that is, the second through holes 220 are also located at the center of the energy-absorbing steel pipe 200 .

[0043] By providing the second through hole 220 , the plastic deformation capacity of the energy-absorbing steel pipe 200 can be further improved, thereby enhancing the ability of the energy-absorbing steel pipe 200 to withstand combined deformation of tension, bending and shearing, and further enhancing the seismic performance of the steel pipe damper.

[0044] Furthermore, the first through hole 210 and the second through hole 220 are circular holes with equal inner diameters. The inner diameter of the first through hole 210 is d, and the outer diameter of the energy-absorbing steel pipe 200 is D, which satisfies: 0.08≤d / D≤0.16.

[0045] Since the second through hole 220 is a newly opened through hole structure on the basis of the already set first through hole 210, therefore, when both the first through hole 210 and the second through hole 220 exist, it is necessary to reduce the size of the first through hole 210 and the second through hole 220 to avoid excessive weakening of the strength of the middle part of the energy-absorbing steel pipe 200 by the first through hole 210 and the second through hole 220 arranged at intervals along the circumference of the energy-absorbing steel pipe 200, and ensure that the energy-absorbing steel pipe 200 has sufficient strength to support the connection to the building.

[0046] Reference Figure 4 As shown, it can be understood that the first through hole 210 is a strip hole, and the strip hole is arranged along the direction of the central axis of the energy-absorbing steel pipe 200.

[0047] The first through hole 210 is a strip hole, and the strip hole is arranged along the central axis of the energy-absorbing steel pipe 200, which ensures that the energy-absorbing steel pipe 200 can bear the shear stress during an earthquake and improves the ability of the energy-absorbing steel pipe 200 to relieve and eliminate tensile stress.

[0048] It should be noted that in addition to round holes and bar holes, users can also set the first through hole 210 and the second through hole 220 to other shapes according to actual needs, such as waist-shaped holes or polygonal holes, as long as the sizes of the first through hole 210 and the second through hole 220 are reasonable and do not affect the strength and seismic resistance of the energy-absorbing steel pipe 200.

[0049] Furthermore, the inner wall of the strip-shaped hole is transitioned through rounded corners, that is, the four corners of the inner wall of the strip-shaped hole are set as rounded corner structures.

[0050] By setting the rounded corners, the concentrated force on the inner wall of the strip hole can be distributed more evenly, avoiding problems such as collapse of the strip hole when the energy-consuming steel pipe 200 is subjected to large stress, and effectively improving the structural rationality of the strip hole.

[0051] Reference Figure 4 and Figure 5 As shown, it can be understood that along the central axis of the energy-absorbing steel pipe 200, the length of the strip hole is l, the height of the energy-absorbing steel pipe 200 is H, along the horizontal direction, the width of the strip hole is w, and the outer diameter of the energy-absorbing steel pipe 200 is D, which satisfies: 0<l / H≤0.1 and 0<w / D≤0.08. Since the strip hole is arranged along the central axis of the energy-absorbing steel pipe 200, it is obvious that w≤l.

[0052] By reasonably limiting the aspect ratio and aperture ratio of the strip hole and the energy-absorbing steel pipe 200, on the one hand, it is possible to avoid the first through hole 210 being too small in width, which limits the plastic deformation ability of the energy-absorbing steel pipe 200, resulting in weakened damping effect and reduced load capacity of the energy-absorbing steel pipe 200. On the other hand, it is possible to avoid the first through hole 210 being too long and the energy-absorbing steel pipe 200 having less material in the middle part, resulting in low strength and weak recovery ability of the energy-absorbing steel pipe 200.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A steel tube damper, characterized in that: include: Two connecting pieces, the two connecting pieces are arranged opposite to each other; An energy-absorbing steel pipe, wherein both ends of the energy-absorbing steel pipe are respectively fixedly connected to the opposite sides of the two connecting pieces, and the energy-absorbing steel pipe is provided with two first through holes, which are symmetrically arranged on both sides of the energy-absorbing steel pipe, and along the direction of the central axis of the energy-absorbing steel pipe, the distance from the center of the first through hole to the two connecting pieces is equal.

2. A steel tube damper according to claim 1, characterized in that: The connecting direction of the two first through holes is parallel to the shear force loading direction of the energy-absorbing steel pipe.

3. A steel tube damper according to claim 2, characterized in that: The ratio of the maximum inner diameter of the first through hole to the outer diameter of the energy-absorbing steel pipe does not exceed 0.

24.

4. A steel tube damper according to claim 2, characterized in that: The energy-absorbing steel pipe is provided with a plurality of second through holes, and the plurality of second through holes and the two first through holes are arranged at intervals along the circumference of the energy-absorbing steel pipe.

5. A steel tube damper according to claim 4, characterized in that: The first through hole and the second through hole are circular holes with equal inner diameters. The inner diameter of the first through hole is d, and the outer diameter of the energy-absorbing steel pipe is D, satisfying: 0.08≤d / D≤0.

16.

6. The steel tube damper according to claim 2, characterized in that: The first through hole is a strip-shaped hole, and the strip-shaped hole is arranged along the direction of the central axis of the energy-absorbing steel pipe.

7. A steel tube damper according to claim 6, characterized in that: The length of the strip hole is l, the width of the strip hole is w, the height of the energy-absorbing steel pipe is H, and the outer diameter of the energy-absorbing steel pipe is D, which satisfies: 0<l / H≤0.1 and 0<w / D≤0.

08.

8. The steel tube damper according to claim 7, characterized in that: The inner wall of the strip-shaped hole is transitioned through a rounded corner.

9. The steel tube damper according to claim 1, characterized in that: A fillet weld is provided between the energy-absorbing steel pipe and the connecting piece. The fillet weld is arranged around the outer wall of the energy-absorbing steel pipe and is respectively welded and fixed to the energy-absorbing steel pipe and the connecting piece.

10. A steel tube damper according to claim 1 or 9, characterized in that: The connecting piece is provided with a positioning groove, and the end of the energy-absorbing steel pipe is snap-fitted with the positioning groove.

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