Frame structure with replaceable beam end metal damper

Abstract

The utility model relates to the field of shock absorption steel structure connecting pieces, in particular to a frame structure with a replaceable beam end metal damper, which comprises a frame column, a frame beam, a middle beam and the metal damper, the metal damper comprises a first end plate, a second end plate and an energy dissipation assembly, and the first end plate and the second end plate are respectively and fixedly connected with the frame beam and the middle beam. The energy dissipation assembly comprises two polygonal energy dissipation pieces and a plurality of arc-shaped energy dissipation pieces, the arc-shaped energy dissipation pieces are located between the two polygonal energy dissipation pieces, the two ends of each polygonal energy dissipation piece are detachably connected with the first end plate and the second end plate correspondingly, and the two ends of each arc-shaped energy dissipation piece are fixedly connected with the first end plate and the second end plate correspondingly. Energy transmitted into the frame during an earthquake is consumed through the energy dissipation assembly in the frame beam end metal damper, it can be guaranteed that the structure is not damaged, only the wave-shaped energy dissipation soft steel in the metal damper needs to be replaced after the earthquake, and the whole metal damper does not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the field of shock-absorbing steel structure connecting pieces, in particular to a frame structure with replaceable beam end metal dampers. Background Art

[0002] Traditional buildings mainly rely on the deformation of the structure itself to absorb earthquake energy, and many main components are difficult to repair after being damaged. With the continuous advancement of earthquake-resistant theories, technologies, and methods, as well as the development and application of more high-performance materials, people have higher and higher requirements for the earthquake resistance of structures. Structural earthquake resistance has gradually shifted from anti-collapse design to recoverable function design, in order to minimize the losses of the entire society after the earthquake.

[0003] Among the methods of realizing recoverable functional structures, the most feasible one at present is the replaceable structure. Replaceable structural components are set in the structure. During a strong earthquake, the damage to the structure is mainly concentrated on the replaceable components. Not only can they be used to effectively dissipate the energy input into the structure by the earthquake, but also it is conducive to the rapid replacement of damaged replaceable components after the earthquake, so as to restore the normal use function of the structure as soon as possible.

[0004] The beam-column joint is an important part of the frame system. The beam-column joint is subjected to complex forces, and its function is to transfer shear force and bending moment between beams and columns. Therefore, under the action of earthquakes, the beam-column joint is severely damaged, and even the entire frame structure collapses, and the post-earthquake repair work is difficult. Therefore, it is very necessary to propose and study the seismic measures of the frame structure. In order to reduce the brittle failure of the beam-column joint of the frame structure under the action of earthquakes, and to ensure that the frame structure can still maintain good ductility after the earthquake to achieve the effect of dissipating earthquake energy, the general method is to add dampers at the beam-column joints to enhance their seismic performance.

[0005] Publication No. CN207296055U discloses a non-buckling corrugated structure energy-absorbing component, which fully utilizes the advantage of the large out-of-plane stiffness of the corrugated structure and has a certain versatility. It can be widely used in steel plate shear walls, shear dampers, connecting beam dampers or other forms of metal shock-absorbing components made of metal materials such as steel, aluminum, and lead. However, it does not describe the application structure of the corrugated structure energy-absorbing component in engineering. Publication No. CN109629702B discloses an easily replaceable metal damper for the top of a bent frame corbel column and a beam-column connection node, wherein the damper is composed of an upper and lower end plate, an intermediate lower end plate, a support plate, a mild steel energy absorption component, a scale, a scale support, longitudinal and transverse strip support steel plates, a stiffener and a shear energy absorption component, wherein the mild steel energy absorption component includes a corrugated mild steel plate, a lower force transfer rod, and a force transfer rod support, wherein the support steel plate and the intermediate lower end plate, the upper and lower force transfer rods and the force transfer rod support are connected by friction-type high-strength bolts, the connecting plate and the angle steel and the U-shaped steel plate are connected by ordinary bolts, and the remaining components are welded. The structure is relatively complex, and bolt structures are often used for connection to achieve the combination of the overall structure, but the combination between the beams and columns has the problem of insufficient strength due to too many bolt connections. Utility Model Content

[0006] Aiming at the problem in the prior art that the combination of beams and columns has insufficient strength due to too many bolt connections, the utility model provides a frame structure with replaceable metal dampers at the beam ends.

[0007] The utility model is realized by the following technical solutions:

[0008] A frame structure with replaceable metal dampers at beam ends, comprising a frame column, a frame beam, an intermediate beam and a metal damper, wherein the frame beam is connected to the frame column, and the intermediate beam is connected to the frame beam via the metal damper;

[0009] The metal damper includes a first end plate, a second end plate and an energy absorption component. The first end plate and the second end plate are fixedly connected to the frame beam and the middle beam respectively. The energy absorption component includes two polygonal energy absorption parts and a plurality of arc-shaped energy absorption parts. The plurality of arc-shaped energy absorption parts are located between the two polygonal energy absorption parts. The two ends of the polygonal energy absorption part are detachably connected to the first end plate and the second end plate respectively. The two ends of the arc-shaped energy absorption part are fixedly connected to the first end plate and the second end plate respectively.

[0010] Preferably, a plurality of polygonal energy absorbing members are evenly spaced and arranged between two arc-shaped energy absorbing members.

[0011] Preferably, the distance between two adjacent polygonal energy-absorbing parts is greater than or equal to the side length of the polygon.

[0012] Preferably, the polygonal energy-absorbing member is formed by symmetrically splicing two corrugated energy-absorbing mild steel sheets.

[0013] Preferably, the yield strength of the corrugated energy-absorbing mild steel sheet is 205 MPa to 240 MPa, and the corrugated energy-absorbing mild steel sheet is formed by bending long steel plates at intervals, and the bending angle is 30° to 60°.

[0014] Preferably, it also includes a fixing plate vertically fixed to the first end plate or the second end plate, the number of the fixing plates is the same as the number of the polygonal energy absorbing parts, and the two ends of the polygonal energy absorbing parts are respectively connected to the fixing plate on the first end plate and the fixing plate on the second end plate through a bolt structure.

[0015] Preferably, the arc-shaped energy-absorbing member comprises a first arc-shaped steel plate and a second arc-shaped steel plate, the first arc-shaped steel plate and the second arc-shaped steel plate are arranged back to back and staggered, and both ends of the first arc-shaped steel plate and both ends of the second arc-shaped steel plate are fixedly connected to the first end plate and the second end plate respectively.

[0016] Preferably, the yield strength of the first curved steel plate and the second curved steel plate is 205 MPa to 240 MPa.

[0017] Preferably, a first elongated groove is opened on the first arc-shaped steel plate, two second elongated grooves are opened on the sides of the second arc-shaped steel plate, and a matching long strip is formed on the second arc-shaped steel plate; after installation, the matching long strip is located in the second elongated groove, and a deformation gap is left between the matching long strip and the second elongated groove.

[0018] Preferably, triangular stiffening ribs are provided between the first end plate and the flange of the frame beam and between the second end plate and the flange of the middle beam.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a frame structure with replaceable metal dampers at the ends of beams. The corrugated energy-absorbing soft steel in the metal dampers at the ends of the frame beams consumes the energy transmitted to the frame during an earthquake, thereby ensuring that the structure itself is not damaged. The polygonal energy-absorbing parts that can be detachably connected are provided to achieve rapid replacement. After the earthquake, only the corrugated energy-absorbing soft steel in the metal damper needs to be replaced, without replacing the entire metal damper. At the same time, the fixed connection of the arc-shaped energy-absorbing parts ensures the strength of the building, while taking into account the replacement of the shock-absorbing energy-absorbing parts and the strength of the building damping connecting parts.

[0021] Furthermore, the positions of the arc-shaped energy absorbing member and the polygonal energy absorbing member are to take into account both the shock absorption and energy absorption effects and the strength effects of the metal damping member.

[0022] Furthermore, the distance between two adjacent polygonal energy absorbing parts is to provide deformation space for the polygonal energy absorbing parts, which helps to increase the service life of the polygonal energy absorbing parts.

[0023] Furthermore, the two corrugated energy-absorbing soft steel sheets are symmetrically assembled, which can more effectively exert the accordion effect of the corrugated steel plate and achieve the purpose of shock absorption and energy consumption.

[0024] Furthermore, the fixing plate is used to connect the polygonal energy absorbing parts, and the bolt structure is used to realize the detachable connection of the polygonal energy absorbing parts to meet the requirements of replacement.

[0025] Furthermore, the back-to-back arrangement of the first arc-shaped steel plate and the second arc-shaped steel plate can achieve both vertical shock absorption and transverse shock absorption, and at the same time ensure the connection strength of the metal damping component.

[0026] Furthermore, the triangular stiffening ribs are used to strengthen the structural strength between the first end plate and the frame beam, and between the second end plate and the middle beam, so as to prevent the occurrence of bending positive stress at the frame beam end, thereby affecting the normal use of the metal damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a frame structure of a replaceable beam end metal damper according to the utility model;

[0028] Figure 2 This is a front view of a frame structure of a replaceable beam end metal damper according to the utility model;

[0029] Figure 3 It is a top view of a frame structure of a replaceable beam end metal damper of the utility model;

[0030] Figure 4 It is an exploded view of a polygonal energy-absorbing part in a frame structure of a replaceable beam-end metal damper of the utility model;

[0031] Figure 5 The utility model discloses an exploded view of an arc-shaped energy-absorbing part in a frame structure of a replaceable beam end metal damper.

[0032] In the figure, 1. frame column; 2. frame beam; 3. first end plate; 4. second end plate; 5. triangular stiffening rib; 6. first arc-shaped steel plate; 7. second arc-shaped steel plate; 8. polygonal energy-absorbing part; 9. fixing plate; 10. middle beam. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0034] The utility model discloses a frame structure with replaceable metal dampers at beam ends, referring to Figure 1 , comprising a frame column 1, a frame beam 2, an intermediate beam 10 and a metal damper, the frame beam 2 is connected to the frame column 1, and the intermediate beam 10 is connected to the frame beam 2 through the metal damper;

[0035] The metal damper includes a first end plate 3, a second end plate 4 and an energy absorption component. The first end plate 3 and the second end plate 4 are fixedly connected to the frame beam 2 and the middle beam 10 respectively. The energy absorption component includes two polygonal energy absorption parts 8 and a plurality of arc-shaped energy absorption parts, and the plurality of polygonal energy absorption parts 8 are evenly arranged between the two arc-shaped energy absorption parts. In this embodiment, three polygonal energy absorption parts 8 are vertically arranged, and the distance between two adjacent polygonal energy absorption parts 8 is greater than or equal to the side length of the polygon to ensure the deformation space of the polygonal energy absorption parts 8. The polygonal energy absorption part 8 is formed by symmetrically splicing two pieces of corrugated energy absorption soft steel sheets. The yield strength of the corrugated energy absorption soft steel sheet is 205MPa-240MPa. The corrugated energy absorption soft steel sheet is formed by bending a long steel plate at intervals, and the bending angle is 30°-60°. When the polygon is a regular hexagon, the bending angle is 60°.

[0036] The two ends of the polygonal energy absorbing member 8 are detachably connected to the first end plate 3 and the second end plate 4 through the fixing plates 9, wherein the fixing plates 9 and the polygonal energy absorbing member 8 are both arranged vertically, and the number of the fixing plates 9 is the same as the number of the polygonal energy absorbing member 8, and the two ends of the polygonal energy absorbing member 8 are respectively connected to the fixing plates 9 on the first end plate 3 and the fixing plates 9 on the second end plate 4 through bolt structures. In order to facilitate the installation of the fixing plates 9, the first end plate 3 and the second end plate 4 are provided with positioning grooves, and the positions of the positioning grooves are set according to the waveform size of the polygonal energy absorbing member 8, and the end of the fixing plate 9 close to the positioning groove is embedded in the positioning groove, and the pre-connection is realized in sequence, and then welding is performed to realize fixation.

[0037] The two ends of the arc-shaped energy dissipation member are respectively fixedly connected (such as welded) to the first end plate 3 and the second end plate 4, and the arc-shaped energy dissipation member includes a first arc-shaped steel plate 6 and a second arc-shaped steel plate 7, and the first arc-shaped steel plate 6 and the second arc-shaped steel plate 7 are arranged in an interlaced manner in a back-to-back manner. In this embodiment, a first long groove is provided on the first arc-shaped steel plate 6, two second long grooves are provided on the side of the second arc-shaped steel plate 7, and a matching long strip is formed on the second arc-shaped steel plate 7; after installation, the matching long strip is located in the second long groove, and a deformation gap is left between the matching long strip and the second long groove.

[0038] In this embodiment, the yield strength of the first curved steel plate 6 and the second curved steel plate 7 is 205MPa-240MPa, and the strengths of the first curved steel plate 6, the second curved steel plate 7 and the corrugated energy-absorbing soft steel sheet can be the same or different, and can be selected according to the strength required by the actual working conditions. The first end plate 3 and the second end plate 4 are made of steel with a yield strength of 235MPa, and are welded to the upper and lower flanges and webs of the frame beam 2 and the middle beam 10, and are further reinforced by triangular stiffening ribs 5.

[0039] Triangular stiffening ribs 5 are provided between the first end plate 3 and the flange of the frame beam 2 and between the second end plate 4 and the flange of the middle beam 10 to prevent the occurrence of bending positive stress at the end of the frame beam 2, thereby affecting the normal use of the metal damper.

[0040] The installation steps of the frame structure of the utility model with replaceable beam end metal damper are as follows:

[0041] First, the first end plate 3 is connected to the upper and lower flanges and web of the frame beam 2 by means of fillet welds, and then the second end plate 4 is connected to the upper and lower flanges and web of the middle beam 10 by means of fillet welds, and then the triangular stiffening ribs 5 are respectively welded to the inner side of the flange of the frame beam 2 and the first end plate 3.

[0042] One end of the fixing plate 9 is welded to the first end plate 3 and the second end plate 4 respectively, and the other end is connected to the corrugated energy-absorbing soft steel sheet by bolts. Finally, the ends of the first arc-shaped energy-absorbing steel plate are welded to the first end plate 3 and the second end plate 4 respectively; then the matching strip of the second arc-shaped energy-absorbing steel plate is matched with the first long groove of the first arc-shaped energy-absorbing steel plate, and the ends are welded to the first end plate 3 and the second end plate 4 respectively to complete the installation.

[0043] The utility model is a frame structure with replaceable metal dampers at the ends of the beams. The corrugated energy-absorbing soft steel in the metal dampers at the ends of the frame beams consumes the energy transmitted to the frame during an earthquake, which can ensure that the structure itself is not damaged. The polygonal energy-absorbing parts 8 that can be detachably connected are provided to achieve rapid replacement. After the earthquake, only the corrugated energy-absorbing soft steel in the metal damper needs to be replaced, and the entire metal damper does not need to be replaced. At the same time, the fixed connection of the arc-shaped energy-absorbing parts ensures the strength of the building, while taking into account the replacement of the shock-absorbing energy-absorbing parts and the strength of the building damping connecting parts.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A frame structure with replaceable beam end metal dampers, characterized in that: It comprises a frame column (1), a frame beam (2), an intermediate beam (10) and a metal damper, wherein the frame beam (2) is connected to the frame column (1), and the intermediate beam (10) is connected to the frame beam (2) via the metal damper; The metal damper comprises a first end plate (3), a second end plate (4) and an energy absorption component, wherein the first end plate (3) and the second end plate (4) are respectively fixedly connected to the frame beam (2) and the middle beam (10), and the energy absorption component comprises two polygonal energy absorption parts (8) and a plurality of arc-shaped energy absorption parts, wherein the plurality of arc-shaped energy absorption parts are located between the two polygonal energy absorption parts (8), and the two ends of the polygonal energy absorption part (8) are respectively detachably connected to the first end plate (3) and the second end plate (4), and the two ends of the arc-shaped energy absorption part are respectively fixedly connected to the first end plate (3) and the second end plate (4).

2. The frame structure of the replaceable beam end metal damper according to claim 1 is characterized in that: A plurality of polygonal energy absorbing members (8) are evenly spaced and arranged between the two arc-shaped energy absorbing members.

3. The frame structure of replaceable beam end metal damper according to claim 2 is characterized in that: The distance between two adjacent polygonal energy-absorbing parts (8) is greater than or equal to the side length of the polygon.

4. The frame structure of replaceable beam end metal damper according to claim 1, characterized in that: The polygonal energy-absorbing member (8) is formed by symmetrically splicing two corrugated energy-absorbing soft steel sheets.

5. The frame structure of replaceable beam end metal damper according to claim 4, characterized in that: The yield strength of the corrugated energy-absorbing soft steel sheet is 205MPa to 240MPa. The corrugated energy-absorbing soft steel sheet is formed by bending long steel plates at intervals, and the bending angle is 30° to 60°.

6. The frame structure of replaceable beam end metal damper according to claim 4, characterized in that: It also includes a fixing plate (9) vertically fixed on the first end plate (3) or the second end plate (4), the number of the fixing plates (9) is the same as the number of the polygonal energy absorbing parts (8), and the two ends of the polygonal energy absorbing parts (8) are respectively connected to the fixing plate (9) on the first end plate (3) and the fixing plate (9) on the second end plate (4) through a bolt structure.

7. The frame structure of replaceable beam end metal damper according to claim 1, characterized in that: The arc-shaped energy-absorbing component comprises a first arc-shaped steel plate (6) and a second arc-shaped steel plate (7), wherein the first arc-shaped steel plate (6) and the second arc-shaped steel plate (7) are arranged in a staggered manner in a back-to-back manner, and two ends of the first arc-shaped steel plate (6) and two ends of the second arc-shaped steel plate (7) are fixedly connected to the first end plate (3) and the second end plate (4) respectively.

8. The frame structure of replaceable beam end metal damper according to claim 1, characterized in that: The yield strength of the first curved steel plate (6) and the second curved steel plate (7) is 205 MPa to 240 MPa.

9. The frame structure of replaceable beam end metal damper according to claim 7, characterized in that: A first long groove is formed on the first arc-shaped steel plate (6), two second long grooves are formed on the side of the second arc-shaped steel plate (7), and a matching long strip is formed on the second arc-shaped steel plate (7); After installation, the matching long strip is located in the second long groove, and a deformation gap is left between the matching long strip and the second long groove.

10. The frame structure of replaceable beam end metal damper according to claim 1, characterized in that: Triangular stiffening ribs (5) are provided between the first end plate (3) and the flange of the frame beam (2) and between the second end plate (4) and the flange of the middle beam (10).

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