A double-layer square steel energy-absorbing support with built-in variable-section plate

Abstract

The present invention is a double-layer square steel energy-absorbing support with a built-in variable-section plate, comprising an outer force-transmitting square steel and an inner force-transmitting square steel. The inner force-transmitting square steel is arranged inside the outer force-transmitting square steel, and a portion of the outer force-transmitting square steel is extended out at one end, leaving a certain deformation distance between the other end and the inner end portion of the outer force-transmitting square steel. A variable-section plate is arranged in the interlayer between the inner force-transmitting square steel and each side surface of the outer force-transmitting square steel. The component of the present invention enables the energy-absorbing support to transmit forces to the same variable-section plate from the inner and outer square steels in opposite directions when subjected to tension or compression, while the same parts of the two adjacent variable-section plates are subjected to forces in completely opposite directions. The four variable-section plates work together under the action of axial force, and half of the variable-section plates are always in tension, so that the energy-absorbing support achieves an energy-absorbing effect of "tension and compression homogeneity".

Description

Technical Field

[0001] The invention relates to the technical field of building structure energy-absorbing supports, and in particular to a double-layer square steel energy-absorbing support with a built-in variable-section plate. Background Art

[0002] Energy-dissipating braces are widely used in building structures to dissipate energy and reduce vibration. They provide significant lateral stiffness and bearing capacity for frame or bent structures. Conventional braces have significant differences in their bearing capacity under tension and compression. Under compression, buckling can occur before reaching the yield capacity, but under tension, internal forces can reach the tensile yield capacity. Therefore, the cross-section of conventional braces is governed by their compressive bearing capacity. Furthermore, conventional braces exhibit poor hysteretic performance when subjected to reciprocating loads such as earthquakes and wind loads.

[0003] Currently, buckling-resistance braces are the most commonly used energy-dissipating braces. Buckling-resistance braces, whose cores yield under axial tension and compression, dissipate energy. Compared with conventional braces, buckling-resistance braces effectively prevent overall instability under axial compression, exhibit minimal degradation in axial compressive bearing capacity, and exhibit superior hysteresis performance.

[0004] However, traditional buckling-resistance braces themselves have certain limitations. Buckling-resistance braces prevent the inner core from compressing and becoming unstable by restraining it, but the exposed part of the inner core will prematurely buckle locally. Although buckling-resistance braces have the effect of "isotropy in tension and compression" to a certain extent, there is still a certain gap between their compressive bearing capacity and their tensile bearing capacity.

[0005] In response to the above problems, the present invention provides a double-layer square steel energy-absorbing support with a built-in variable-section plate. When the energy-absorbing support is subjected to tension or pressure, half of the variable-section plate is always in a tensile state, achieving a true "tension-compression isotropy" effect. At the same time, the internal and external force-transmitting square steels are both closed-section, and no weak parts are formed. Under the action of axial force, the ends are not easily damaged. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problems existing in the prior art and provide a double-layer square steel energy-absorbing support with a built-in variable-section plate, which absorbs energy through the tensile and compressive deformation of the variable-section plate. That is, when the energy-absorbing support is subjected to axial tension or pressure, the inner and outer force-transmitting square steels transmit the axial forces of the same variable-section plate through the weld in opposite directions, and the force directions of the same parts of adjacent variable-section plates are also opposite. This ensures that when the energy-absorbing support is subjected to tension and pressure, half of the variable-section plates are always in a tensile state, achieving the effect of "tensile and compressive isotropy".

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] A double-layer square steel energy-absorbing support with a built-in variable-section plate includes an outer force-transmitting square steel and an inner force-transmitting square steel. The inner force-transmitting square steel is arranged inside the outer force-transmitting square steel, and a portion of the outer force-transmitting square steel is extended out of the inner force-transmitting square steel at one end, leaving a certain deformation distance between the other end and the inner end portion of the outer force-transmitting square steel. A variable-section plate is arranged in the interlayer between each side surface of the inner force-transmitting square steel and the outer force-transmitting square steel.

[0009] Furthermore, the variable cross-section plate is composed of a middle non-variable cross-section section, a cross-section reduction section and an end non-variable cross-section section from the middle to the two ends, and both the middle non-variable cross-section section and the end non-variable cross-section section transition to the cross-section reduction section through an inwardly concave arc.

[0010] Furthermore, the variable section plate includes a first variable section plate and a second variable section plate, and the first variable section plate and the second variable section plate are respectively arranged in the interlayer between the adjacent side surfaces of the inner force transmission square steel and the outer force transmission square steel.

[0011] Furthermore, a pair of oblong holes are respectively provided on the end non-variable section of the first variable section plate and the middle non-variable section of the second variable section plate. A pair of oblong holes are respectively provided at both ends of two opposite side surfaces of the external force-transmitting square steel, and a pair of oblong holes are provided in the middle of the other two opposite side surfaces. The middle non-variable section of the first variable section plate is connected to the external force-transmitting square steel through a first weld formed by the oblong hole in the middle of the external force-transmitting square steel, the end non-variable section of the first variable section plate is connected to the internal force-transmitting square steel through a second weld formed by its oblong hole, the middle non-variable section of the second variable section plate is connected to the internal force-transmitting square steel through a second weld formed by its oblong hole, and the end non-variable section of the second variable section plate is connected to the external force-transmitting square steel through a first weld formed by the oblong hole at the end of the external force-transmitting square steel.

[0012] Furthermore, the cross-section reduction section is in the form of a non-variable cross-section or a variable cross-section.

[0013] Furthermore, end plates are respectively provided outside the outer ends of the outer force transmission square steel and the inner force transmission square steel, for sealing the outer ends of the outer force transmission square steel and the inner force transmission square steel.

[0014] Furthermore, stiffening ribs are respectively provided in the inner end port and the outer end extension portion of the inner force transmission square steel, and the stiffening ribs are connected to the inner force transmission square steel through a third weld.

[0015] Furthermore, a plate hinge is connected to the outer end surface of the end plate, and a plate hinge hole is reserved on the plate hinge to facilitate connection with the corresponding frame body.

[0016] The beneficial effects of the present invention are:

[0017] (1) Compared with the traditional energy-absorbing support, the end of the energy-absorbing support of the present invention has no protruding weak parts, which overcomes the disadvantage that the end connection parts of the traditional energy-absorbing support are easily damaged.

[0018] (2) In the present invention, the internal and external force-transmitting square steels are placed alternately and connected to the variable-section plates in the interlayer through welds. The four variable-section plates can work together when the energy-dissipating support is subjected to tension or pressure, and deformation energy dissipation is achieved by simultaneously stretching and compressing, thereby improving the energy dissipation capacity of the energy-dissipating support and reducing the response of the building structure to earthquakes when encountering earthquakes.

[0019] (3) The present invention can be processed and welded in the factory, and the end plate hinge facilitates its assembly with the main structure such as the frame. It is simple to make and easy to construct, which can significantly reduce the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the double-layer square steel energy dissipation support with built-in variable-section plates according to the present invention;

[0021] Figure 2 This is a side view of the double-layer square steel energy dissipation support with built-in variable-section plates according to the present invention;

[0022] Figure 3 This is an axonometric drawing of a double-layer square steel energy dissipation support with a built-in variable-section plate according to the present invention;

[0023] Figure 4 It is an isometric view of the first variable-section plate of the present invention;

[0024] Figure 5 is an axonometric view of a second variable-section plate of the present invention;

[0025] Figure 6 For the present invention Figure 1 The cross-sectional view at AA in the middle is the radial cross-sectional view along AA.

[0026] Figure 7 For the present invention Figure 1 The cross-section at the middle BB is the radial cross-section of the BB;

[0027] Figure 8 For the present invention Figure 1 Cross-section at the middle CC, i.e., CC radial cross-section;

[0028] Figure 9 This is a schematic end view of a double-layer square steel energy dissipation support with a built-in variable-section plate according to the present invention.

[0029] Explanation of the numbers in the figure: 1. External force transmission square steel; 2. Internal force transmission square steel; 3. First variable section plate; 4. Second variable section plate; 5. End plate; 6. Stiffening rib; 7. Plate hinge; 8. First weld; 9. Second weld; 10. Third weld; a. Middle non-variable section; b. Section with reduced section; c. End non-variable section. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] like Figure 1 and Figure 2 As shown, a double-layer square steel energy-absorbing support with a built-in variable-section plate includes an external force-transmitting square steel 1 and an internal force-transmitting square steel 2. The internal force-transmitting square steel 2 is arranged in the external force-transmitting square steel 1, and extends out of a part of the external force-transmitting square steel 1 at one end, leaving a certain deformation distance between the other end and the inner end portion of the external force-transmitting square steel 1, and a variable-section plate is arranged in the interlayer between the internal force-transmitting square steel 2 and each side surface of the external force-transmitting square steel 1.

[0032] The variable section plate is composed of a middle non-variable section a, a section reducing section b and an end non-variable section c from the middle to the two ends, and both the middle non-variable section a and the end non-variable section c transition to the section reducing section b through an inwardly concave arc.

[0033] like Figure 4 and Figure 5 As shown, the variable section plate includes a first variable section plate 3 and a second variable section plate 4, and the first variable section plate 3 and the second variable section plate 4 are respectively arranged in the interlayer between the adjacent sides of the inner force transmission square steel 2 and the outer force transmission square steel 1 to form a staggered placement structure.

[0034] A pair of oblong holes are respectively provided on the end non-variable section c of the first variable section plate 3 and the middle non-variable section a of the second variable section plate 4. Figure 3 As shown, the two opposite sides of the external force transmission square steel 1 are each provided with a pair of oblong holes at both ends, and the middle part of the other two opposite sides is provided with a pair of oblong holes, as shown in FIG. Figures 6 to 8 As shown, the middle non-variable section a of the first variable section plate 3 is connected to the external force transmission square steel 1 through the first weld 8 formed by the oblong hole in the middle of the external force transmission square steel 1, the end non-variable section c of the first variable section plate 3 is connected to the internal force transmission square steel 2 through the second weld 9 formed by its oblong hole, the middle non-variable section a of the second variable section plate 4 is connected to the internal force transmission square steel 2 through the second weld 9 formed by its oblong hole, and the end non-variable section c of the second variable section plate 4 is connected to the external force transmission square steel 1 through the first weld 8 formed by the oblong hole at the end of the external force transmission square steel 1.

[0035] The cross-section reduction section b is in the form of a non-variable cross-section or a variable cross-section.

[0036] like Figure 1 、 Figure 2 and Figure 9 As shown, end plates 5 are respectively provided outside the outer ends of the outer force transmission square steel 1 and the inner force transmission square steel 2. In this embodiment, the cross-section of the end plate 5 is also square, which is used to seal the outer ends of the outer force transmission square steel 1 and the inner force transmission square steel 2.

[0037] like Figure 1 and Figure 2 As shown, stiffening ribs 6 are respectively provided in the inner end port and the outer end extension of the inner force transmission square steel 2 , and the stiffening ribs 6 are connected to the inner force transmission square steel 2 through a third weld 10 .

[0038] like Figure 9 As shown, a plate hinge 7 is connected to the outer end surface of the end plate 5. In this embodiment, the plate hinge 7 is in the shape of a semi-ellipse, and a plate hinge hole is reserved on the plate hinge 7 to facilitate connection with the corresponding frame body.

[0039] Connection process and principle of the present invention

[0040] In the present invention, the connection process is as follows: first, the stiffening ribs 6 are welded to the inside of the two ends of the inner force-transmitting square steel 2, and the four variable-section plates are welded to the four surfaces of the inner force-transmitting square steel 2 through the second weld 9, and then the inner force-transmitting square steel 2 is placed in the outer force-transmitting square steel 1, and a part of the outer force-transmitting square steel 1 is extended out at one end, and a certain deformation distance is left between the end of the inner force-transmitting square steel 2 and the end of the outer force-transmitting square steel 1 at the other end. A pair of oblong holes are respectively opened at the two ends of the outer force-transmitting square steel 2 and the middle of its adjacent surfaces. The variable-section plate is connected to the outer force-transmitting square steel 1 at the oblong hole through the first weld 8, and finally the end plate 5 is welded to the outward-extending end of the inner and outer force-transmitting square steels, and the plate hinge 7 is welded to the end plate 5, on which a plate hinge hole is reserved for connection to the main structure such as the frame.

[0041] Combine Figures 1 to 3 As shown, its working process is as follows: when the building is subjected to wind load or earthquake load, the building applies pressure or tension to the energy dissipation support of the present invention through the plate hinge 7 and the end plate 5, and the external force transmission square steel 1 and the internal force transmission square steel 2 slip relative to each other, forming relative movement, and transmit the force to the four variable section plates through the welds. Due to the different welding positions, the directions of the forces applied to the same parts of the two adjacent variable section plates are completely opposite, so there is always a variable section plate that bears the tension, and finally the energy dissipation support dissipates energy through the tensile and compressive deformation of the variable section plates.

[0042] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0043] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A double-layer square steel energy dissipation support with a built-in variable-section plate, characterized in that: The invention comprises an outer force-transmitting square steel (1) and an inner force-transmitting square steel (2), wherein the inner force-transmitting square steel (2) is arranged in the outer force-transmitting square steel (1) and extends a portion of the outer force-transmitting square steel (1) at one end, and a deformation distance is left between the other end and the inner end portion of the outer force-transmitting square steel (1), and a variable-section plate is arranged in the interlayer between each side surface of the inner force-transmitting square steel (2) and the outer force-transmitting square steel (1); The variable cross-section plate is composed of a middle non-variable cross-section section (a), a cross-section reduction section (b), and an end non-variable cross-section section (c) from the middle to the ends, and both the middle non-variable cross-section section (a) and the end non-variable cross-section section (c) transition to the cross-section reduction section (b) through an inwardly concave arc. The variable-section plate comprises a first variable-section plate (3) and a second variable-section plate (4), wherein the first variable-section plate (3) and the second variable-section plate (4) are respectively arranged in the interlayer between adjacent side surfaces of the inner force-transmitting square steel (2) and the outer force-transmitting square steel (1); A pair of oblong holes are respectively provided on the end non-variable section (c) of the first variable section plate (3) and the middle non-variable section (a) of the second variable section plate (4); a pair of oblong holes are respectively provided at the two ends of two opposite side surfaces of the external force transmission square steel (1); and a pair of oblong holes are provided in the middle of the other two opposite side surfaces; the middle non-variable section (a) of the first variable section plate (3) is connected to the external force transmission square steel (1) through a first weld (8) formed by the oblong holes in the middle of the external force transmission square steel (1); The end non-variable cross-section section (c) of the first variable cross-section plate (3) is connected to the inner force-transmitting square steel (2) through a second weld (9) formed by its oblong hole, the middle non-variable cross-section section (a) of the second variable cross-section plate (4) is connected to the inner force-transmitting square steel (2) through a second weld (9) formed by its oblong hole, and the end non-variable cross-section section (c) of the second variable cross-section plate (4) is connected to the outer force-transmitting square steel (1) through a first weld (8) formed by the oblong hole at the end of the outer force-transmitting square steel (1); The cross-section reduction section (b) is in the form of a non-variable cross-section or a variable cross-section; End plates (5) are respectively provided outside the outer ends of the outer force transmission square steel (1) and the inner force transmission square steel (2). The cross-section of the end plates (5) is also square and is used to seal the outer ends of the outer force transmission square steel (1) and the inner force transmission square steel (2).

2. The double-layer square steel energy dissipation support with built-in variable-section plate according to claim 1 is characterized in that: Stiffening ribs (6) are respectively provided in the inner end port and the outer end extension of the inner force transmission square steel (2), and the stiffening ribs (6) are connected to the inner force transmission square steel (2) through a third weld (10).

3. The double-layer square steel energy dissipation support with built-in variable-section plate according to claim 2 is characterized in that: A plate hinge (7) is connected to the outer end surface of the end plate (5), and a plate hinge hole is reserved on the plate hinge (7) to facilitate connection with the corresponding frame body.

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