Bending damper

Abstract

The application discloses a bending damper, which comprises a pair of I-shaped steel for plastic bending resistance, a pair of flange plates of the I-shaped steel being arranged in parallel opposition and leaving a space in the middle; a pair of shear steel plates for elastic shear resistance, each of the shear steel plates being fixedly connected with inner side plates and outer side plates arranged in parallel opposition on both sides, and the pair of shear steel plates being fixedly connected with both ends of the pair of I-shaped steel through the inner side plates; and a pair of connecting plate assemblies for connecting a building main body and being fixedly connected with the outer sides of a pair of flange plates of the pair of I-shaped steel which are away from each other. The bending damper mainly utilizes the combination of the shear steel plates and the I-shaped steel, cancels the arc energy dissipation section of the ring-shaped metal damper, and is more convenient to process and manufacture. Moreover, the I-shaped steel has greater plastic bending resistance bearing capacity, and thick steel plates are not needed to meet the yield force requirement of the damper.

Description

Technical Field

[0001] This invention relates to the field of dampers, and more specifically to a bending damper. Background Technology

[0002] The annular metal damper includes an annular plate, which comprises a pair of parallel, vertically aligned straight sections and a pair of arc-shaped energy-dissipating sections connected to the straight sections and arranged horizontally opposite each other. The straight sections include elastic straight sections and energy-dissipating straight sections, with connecting plates fixed to the elastic straight sections. The annular metal damper is installed and connected to the building structure via the pair of vertically aligned connecting plates.

[0003] In order to achieve a large yield force and a small yield displacement, the aforementioned annular metal damper often requires the use of very thick steel plates. Thick plates have poor ductility and the bending process is relatively complex. Therefore, the processing of annular dampers is difficult and the parameter range is limited. Summary of the Invention

[0004] To address the problems of the aforementioned annular metal dampers, this invention provides a bending damper that utilizes a combination of shear steel plates and I-beams to eliminate the arc-shaped energy-dissipating section of the annular metal damper. Furthermore, the I-beams have greater plastic bending bearing capacity, eliminating the need for very thick steel plates to meet the damper's yield strength requirements, and making processing and manufacturing more convenient.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a bending damper, comprising:

[0006] A pair of I-beams for plastic bending resistance, wherein a pair of flanges of the pair of I-beams are arranged in parallel opposite directions with a gap in the middle;

[0007] A pair of shear-resistant steel plates for elastic shear resistance, each of the shear-resistant steel plates having an inner side plate and an outer side plate fixedly connected to both sides in parallel and opposite arrangement, the pair of shear-resistant steel plates being fixedly connected to both ends of the pair of I-beams through the inner side plates;

[0008] A pair of connecting plate assemblies for connecting the main body of the building are fixedly connected to the outer sides of a pair of relatively distant flanges of the pair of I-beams;

[0009] The I-beam defines the elastic straight section in the middle and the energy-dissipating straight sections on both sides. The energy-dissipating straight sections are connected and fixed to the outer side and the inner side plate. The connecting plate assembly is fixedly connected to the elastic straight section.

[0010] The elastic shear bearing capacity of the shear-resistant steel plate is not lower than the plastic bending bearing capacity of the energy-dissipating straight section of the I-beam;

[0011] A first stiffening rib is fixedly connected to both ends of the elastic straight section inside the I-beam, and the first stiffening rib is arranged perpendicular to the web of the I-beam.

[0012] A second stiffening rib is fixedly connected within the energy-consuming straight section, and the second stiffening rib is arranged perpendicular to the web of the I-beam.

[0013] Furthermore, the connecting plate assembly includes a pair of first connecting plates arranged in parallel opposite directions and a pair of second connecting plates fixedly connected to both ends of the pair of first connecting plates.

[0014] Furthermore, the first connecting plate is in the shape of an isosceles trapezoid, with the shorter base length corresponding to the length of the elastic straight section and fixedly connected to the flange plate of the I-beam.

[0015] Furthermore, the second stiffening rib is centrally located between the first stiffening rib and the adjacent inner side plate.

[0016] Furthermore, the thickness of the shear-resistant steel plate is greater than the thickness of the web of the I-beam.

[0017] Furthermore, the two ends of the relatively distant pair of flanges of the pair of I-beams extend outward and are fixedly connected to the two ends of the outer side plates of the pair of shear plates.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The bending damper of the present invention is installed and connected to the main structure of the building through a connecting plate. The bending damper is mainly composed of a pair of I-beams and a pair of shear plates. The shear plates have inner and outer plates on both sides and are fixedly connected to the two ends of the pair of I-beams through the inner plates. The shear plates are aligned with the center of the web of the I-beams and the thickness of the shear plates is greater than the thickness of the web of the I-beams. When the damper undergoes horizontal lateral displacement, the shear plates transfer the shear force to the upper and lower I-beams. The I-beams are bent, and the upper and lower flanges of the I-beams yield under tension and compression, thus dissipating energy. The straight sections on both sides of the I-beams undergo bending deformation. The stiffening ribs are set to suppress the out-of-plane deformation of the flanges, increase the ductility of the flanges, greatly improve the working performance of the damper, and achieve higher overall ductility.

[0019] This invention can solve the problem that in the prior art, the annular metal damper is prone to damage in the high stress and strain zone during use, especially at the junction of the energy dissipation straight section and the elastic straight section (i.e., the junction of the connecting plate and the straight section), which seriously affects the working performance of the annular metal damper.

[0020] Meanwhile, the curved damper of the present invention has a flat appearance and can be completely hidden in the wall of the structure without affecting the use space. Attached Figure Description

[0021] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a three-dimensional structural diagram of a bending damper according to an embodiment of the present invention (the connecting plate is not shown in the figure).

[0023] Figure 2 This is a schematic diagram of the planar structure of the bending damper according to an embodiment of the present invention.

[0024] Figure 3 for Figure 2 Sectional view at point 1-1.

[0025] Figure 4 for Figure 2 Sectional view at point 2-2.

[0026] Figure 5 for Figure 2 Sectional view at point 3-3.

[0027] Figure 6 for Figure 2 Sectional view at point 4-4.

[0028] The correspondence between the numbers in the attached diagram is as follows:

[0029] 1-Shear-resistant steel plate; 2-I-beam web; 31-Inner flange plate; 32-Outer flange plate; 4-First stiffening rib; 5-Second stiffening rib; 6-First connecting plate; 7-Second connecting plate; 8-Inner plate; 9-Outer plate; A-Elastic zone; B-Plastic zone. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] See Figures 1-6 As shown, an embodiment of the present invention provides a bending damper, which mainly includes a pair of I-beams for plastic bending resistance, a pair of shear plates 1 for elastic shear resistance, and a pair of connecting plate assemblies.

[0033] Each I-beam includes a central web 2 and two flanges perpendicularly connected to both sides of the central web. In this embodiment, the pair of I-beams are arranged parallel to each other, and their length, dimensions, and materials are identical (in specific cases, the cross-sectional shape, dimensions, and materials of the I-beams can be changed to meet the seismic requirements of different building structures). For ease of understanding, the pair of parallel flanges of a pair of I-beams will be referred to as the inner flanges 31, and the pair of relatively distant flanges will be referred to as the outer flanges 32. The pair of inner flanges 31 are spaced apart and arranged parallel to each other. The spacing between the two I-beams can be adjusted according to the actual seismic requirements of the building structure.

[0034] A pair of shear plates 1 are located at both ends of a pair of I-beams. Each shear plate 1 has an inner side plate 8 and an outer side plate 9 fixedly connected to its two sides. The pair of shear plates 1 are fixedly connected to the two ends of the pair of I-beams through their respective inner side plates 8. In this embodiment, the thickness of the shear plate 1 is greater than the thickness of the web plate 2 of the I-beam to increase the elastic shear bearing capacity of the shear plate 1. In some cases, the thickness of the shear plate can be kept unchanged, but the width of the shear plate 1 can be increased, or a steel plate with a higher elastic shear bearing capacity grade can be used to make the shear plate, thereby increasing the elastic shear bearing capacity of the shear plate 1 and ensuring that the shear plate 1 remains elastic during use.

[0035] Furthermore, the I-beam defines a central elastic straight section and two energy-dissipating straight sections on either side. The outer side of the energy-dissipating straight section is welded to the inner side plate 8. A connecting plate assembly is fixedly connected to the elastic straight section, and the width of the connecting plate assembly connected to the outer flange plate 32 of the I-beam is consistent with the width of the elastic straight section. The elastic shear bearing capacity of the shear steel plate 1 is not less than the plastic bending bearing capacity of the energy-dissipating straight section relative to the stress arm, wherein the plastic bending bearing capacity ≤ elastic shear bearing capacity * stress arm. In this embodiment, the stress arm is the vertical distance between the height center point of the shear steel plate and the height center point of the energy-dissipating straight section.

[0036] like Figure 2 As shown, the area where the shear steel plate is located is defined as the elastic zone A of the damper, and the area where the I-beam is located is defined as the plastic zone B of the damper. The elastic bearing capacity of the elastic zone A is greater than the flexural plastic bearing capacity corresponding to the plastic zone B.

[0037] Furthermore, in this embodiment, the shear plate 1 and the web plate 2 of the I-beam are aligned, meaning the centerlines of the shear plate 1 and the web plate 2 in the width direction are on the same line. The thickness and material of the shear plate 1 can be changed according to actual needs to meet the requirements of the damper. When the damper undergoes horizontal lateral displacement, the shear plate 1 first dissipates energy, then the shear force is transferred to the upper and lower I-beams. The I-beams are bent, and the upper and lower flanges of the I-beams yield under tension and compression, thus dissipating energy. The thickness of the shear plate 1 is greater than the thickness of the web plate 2 of the I-beam, enabling it to withstand a larger bending moment and uniformly transfer the shear force to the upper and lower I-beams, improving the overall performance of the damper. The inner plate 8 and the outer plate 9 can be made of steel plates, vertically welded and fixed to the opposite sides of the shear plate 1, with the height of the inner plate 8 and the outer plate 9 equal to the height of the shear plate 1, and the width of the inner plate 8 and the outer plate 9 equal to the width of the I-beam flange.

[0038] In addition, the two ends of the relatively far outer flange plates 32 of the pair of I-beams extend outward and are welded and fixed to the upper and lower ends of the outer flange plate 9 of the shear steel plate 1. Therefore, the pair of outer flange plates 9 and the pair of outer flange plates 32 are welded to form a rectangular box, which encloses the damper structure.

[0039] A pair of connecting plate assemblies are used to connect the building body, and are respectively fixedly connected to the outer sides of a pair of relatively far outer flange plates 32 of a pair of I-beams.

[0040] In this embodiment, the connecting plate assembly includes a pair of first connecting plates 6 arranged in parallel opposite directions and a pair of second connecting plates 7 fixedly connected to both ends of the pair of first connecting plates 6. The first connecting plate 6 is in the shape of an isosceles trapezoid, with the shorter base length corresponding to the length of the elastic straight section and fixedly connected to the outer flange plate 32 of the I-beam. During use, the junction of the energy-dissipating straight section and the elastic straight section (i.e., the junction where the connecting plate and the straight section are fixed) is prone to damage, which seriously affects the working performance of the damper. Therefore, corresponding to both ends of the elastic straight section, a first stiffening rib 4 is fixedly connected inside the I-beam. The first stiffening rib 4 is set perpendicular to the web plate 2 and the flange plate of the I-beam. The first stiffening rib 4 can be made of steel plate, with the same height as the web plate 2 of the I-beam and the width equivalent to the width of a general flange plate. In this way, the three sides of the first stiffening rib 4 can be welded and fixed to the web plate 2, the inner flange plate 31, and the outer flange plate 32 of the I-beam, respectively. Moreover, the outer free side of the first stiffening rib 4 is flush with both sides of the flange plate, resulting in better overall damping. Alternatively, the cross-sectional shape of the I-beam at the junction of the energy dissipation straight section and the elastic straight section can be appropriately widened, which can also play a role in strengthening protection and preventing damage. Furthermore, one or more second stiffening ribs 5 are fixedly connected within the energy-dissipating straight section. The number of second stiffening ribs 5 can be determined according to the actual seismic requirements of the main building. Multiple second stiffening ribs 5 should preferably be arranged in parallel with equal spacing. The material, shape, and size of the second stiffening ribs 5 can be the same as the first stiffening rib 4. In this embodiment, each energy-dissipating straight section is provided with one second stiffening rib 5, which is centrally located between the first stiffening rib 4 and the adjacent inner side plate 8, and is perpendicular to the web plate 2 and flange plate of the I-beam. When the energy-dissipating straight sections on both sides of the I-beam undergo bending deformation, the stiffening ribs suppress large out-of-plane deformation of the flange plate, increasing the ductility of the flange plate and greatly improving the working performance of the damper, achieving higher overall ductility.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] This invention relates to a bending damper that is connected to the building structure via a connecting plate. The bending damper mainly consists of a pair of I-beams and a shear plate. The shear plate has inner and outer plates on both sides, and is fixedly connected to the ends of the pair of I-beams via the inner plates. The shear plate is aligned with the center of the web of the I-beams, and its thickness is greater than that of the web. When the damper undergoes horizontal lateral displacement, the shear plate transfers the shear force to the upper and lower I-beams, causing the I-beams to bend. The upper and lower flanges of the I-beams yield under tension and compression, thus dissipating energy. The straight sections on both sides of the I-beams undergo bending deformation. Stiffening ribs are used to suppress large out-of-plane deformation of the flanges, increasing their ductility and significantly improving the damper's performance, achieving higher overall ductility.

[0043] To achieve a large yield force and a small yield displacement, existing annular metal dampers often require very thick steel plates. Thick plates have poor ductility, and the bending process is relatively complex, making it difficult to control the curvature. Therefore, the processing of annular dampers is difficult, and the parameter range is limited.

[0044] The bending damper of this invention mainly utilizes a combination of shear steel plates and I-beams, eliminating the arc-shaped energy-dissipating section of the annular metal damper, making processing and manufacturing more convenient. Furthermore, the I-beams have greater plastic bending capacity, eliminating the need for very thick steel plates to meet the damper's yield strength requirements.

[0045] Meanwhile, the curved damper of the present invention has a flat appearance and can be completely hidden in the wall of the structure without affecting the use space.

[0046] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A bending damper, characterized in that, include: A pair of I-beams for plastic bending resistance, wherein a pair of flanges of the pair of I-beams are arranged in parallel opposite directions with a gap in the middle; A pair of shear-resistant steel plates for elastic shear resistance, each of the shear-resistant steel plates having an inner side plate and an outer side plate fixedly connected to both sides in parallel and opposite arrangement, the pair of shear-resistant steel plates being fixedly connected to both ends of the pair of I-beams through the inner side plates; A pair of connecting plate assemblies for connecting the main body of the building are fixedly connected to the outer sides of a pair of relatively distant flanges of the pair of I-beams; The I-beam defines the elastic straight section in the middle and the energy-dissipating straight sections on both sides. The energy-dissipating straight sections are connected and fixed to the outer side and the inner side plate. The connecting plate assembly is fixedly connected to the elastic straight section. The elastic shear bearing capacity of the shear-resistant steel plate is not lower than the plastic bending bearing capacity of the energy-dissipating straight section of the I-beam; A first stiffening rib is fixedly connected to both ends of the elastic straight section inside the I-beam, and the first stiffening rib is arranged perpendicular to the web of the I-beam. A second stiffening rib is fixedly connected within the energy-consuming straight section, and the second stiffening rib is arranged perpendicular to the web of the I-beam.

2. The bending damper according to claim 1, characterized in that, The connecting plate assembly includes a pair of first connecting plates arranged in parallel opposite directions and a pair of second connecting plates fixedly connected to both ends of the pair of first connecting plates.

3. The bending damper according to claim 2, characterized in that, The first connecting plate is in the shape of an isosceles trapezoid, with the shorter base length corresponding to the length of the elastic straight section and fixedly connected to the flange of the I-beam.

4. The bending damper according to claim 1, characterized in that, The second stiffening rib is centrally located between the first stiffening rib and the adjacent inner side plate.

5. The bending damper according to claim 1, characterized in that, The thickness of the shear-resistant steel plate is greater than the thickness of the web of the I-beam.

6. The bending damper according to claim 1, characterized in that, The two ends of a pair of relatively distant flanges of the pair of I-beams extend outward and are fixedly connected to the two ends of the outer side plates of the pair of shear plates.

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