Seismic reinforcement device and reinforcement method for reinforced concrete frame structure

Abstract

The application relates to the technical field of reinforced concrete frame structures, and discloses an anti-seismic reinforcing device and a reinforcing method for a reinforced concrete frame structure, wherein the frame comprises a first framework, a first cross reinforcing member connected in the first framework, and a first concrete layer poured and covered outside the first framework; the stand column comprises a second framework, a transverse reinforcing member in the second framework, a longitudinal reinforcing member arranged in the transverse reinforcing member, and a second concrete layer poured and covered outside the second framework, the transverse reinforcing member and the longitudinal reinforcing member, and the upper and lower ends of the longitudinal reinforcing member are expanded to the two sides and then inserted into the corresponding first framework; the first cross reinforcing member and the first framework form an integral whole, the structural strength of the frame is enhanced, the first cross reinforcing member can enhance the structural strength of the frame, the transverse reinforcing member plays a role in transversely supporting the inside of the second framework, and the longitudinal reinforcing member plays a role in longitudinally supporting the inside of the second framework.

Description

Technical Field

[0001] This invention relates to the field of reinforced concrete frame structure technology, specifically to a seismic reinforcement device and method for reinforced concrete frame structures. Background Technology

[0002] Reinforced concrete frame structures play a vital role in architecture and engineering. The requirements for reinforced concrete frame structures are often quite complex, especially in terms of their seismic performance. Common reinforced concrete frame structures either have insufficient structural strength within the concrete skeleton itself or insufficient connection strength between the skeletons after concrete pouring, both of which reduce the seismic resistance of the reinforced concrete frame structure. In environments with significant vibration, the various components of the reinforced concrete frame structure are prone to bending and deformation after the concrete has solidified, thus causing destructive damage to the reinforced concrete frame structure. To address this, we introduce a seismic strengthening device and method for reinforced concrete frame structures. Summary of the Invention

[0003] The purpose of this invention is to provide a seismic strengthening device and method for reinforced concrete frame structures to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a seismic reinforcement device for a reinforced concrete frame structure, comprising upper and lower frames and a column at the corner connecting the upper and lower frames, wherein the frame comprises a first skeleton, a first cross-shaped reinforcing member connected inside the first skeleton, and a first concrete layer poured and covering the outside of the first skeleton, and the connection between the first cross-shaped reinforcing member and the first skeleton is covered by the first concrete layer.

[0005] The first frame includes two sets of outer rectangular steel bars arranged vertically, two sets of inner rectangular steel bars arranged vertically, and several sets of first stirrups fixed to the outside of the outer and inner rectangular steel bars, with the inner rectangular steel bars located inside the corresponding outer rectangular steel bars.

[0006] The first cross reinforcement includes a first cross plate and hook-shaped steel bars connected to the ends of the four corners of the first cross plate. The hook-shaped steel bars are used to hook onto the outer rectangular steel bars and the inner rectangular steel bars, and the ends of the four corners of the first cross plate are inserted into the first frame.

[0007] The upper hook-shaped steel bar hooks onto the top of the upper outer rectangular steel bar and the inner rectangular steel bar, while the lower hook-shaped steel bar hooks onto the bottom of the lower outer rectangular steel bar and the inner rectangular steel bar.

[0008] The column includes a second frame, a transverse reinforcement inside the second frame, a longitudinal reinforcement inside the transverse reinforcement, and a second concrete layer poured to cover the outside of the second frame, the transverse reinforcement, and the longitudinal reinforcement. The upper and lower ends of the longitudinal reinforcement expand to both sides and are inserted into the corresponding first frame. The first concrete layer and the second concrete layer solidify to form an integral whole.

[0009] The second skeleton includes four sets of vertical steel bars arranged in a rectangular shape, and second stirrups that are sleeved and fixed on the outside of the four sets of vertical steel bars at equal intervals.

[0010] The transverse reinforcement includes two sets of upper and lower second cross plates and two sets of left and right vertical connecting steel bars connected between the upper and lower sets of second cross plates. The ends of the four corners of the second cross plate are provided with extension plates. The second cross plate is supported and fixed on the corresponding second stirrups. The upper second cross plate is supported on the lower end of the upper first frame, and the lower second cross plate is supported on the upper end of the lower first frame.

[0011] The longitudinal reinforcement includes a vertical plate fixed in the middle between the upper and lower sets of second cross plates and connecting plates fixed on both sides of the vertical plate. Longitudinal steel bars are connected between the two sets of connecting plates in the middle, and expansion steel bars are connected between the upper and lower sets of connecting plates. The ends of the upper and lower expansion steel bars are opened and expanded to both sides and inserted into the corresponding first skeleton.

[0012] A reinforcing member is fixed to the outer side of the middle part of the column, and a horizontal plate is slidably connected to the side of the reinforcing member. A screw is fixed to the end of the horizontal plate. Support plates are movably connected to the upper and lower parts of the side of the reinforcing member through pins. The screws on the adjacent horizontal plates are connected and fixed through an internal threaded cylinder. The rotation of the internal threaded cylinder pulls the horizontal plate through the screw, thereby causing the horizontal plate to push the upper and lower support plates to open and support them on the frame. An extrusion plate is also fixed between the adjacent support plates. After the extrusion plate is fixed on the frame, it extrudes and supports the support plates on the frame surface.

[0013] Preferably, the wrapping reinforcement includes a right-angle fastening plate and a right-angle mounting base. The right-angle fastening plate is wrapped around the outer corner of the column, and the right-angle mounting base is wrapped around the inner corner of the column. The right-angle fastening plate and the right-angle mounting base are fastened together by bolts.

[0014] The right-angle mounting base has connecting frames on its two outer sides, and sliding protrusions are provided on both sides of the end of the horizontal plate away from the screw. The sliding protrusions slide in the grooves of the inner wall of the connecting frame, and arc-shaped protrusions are also provided on the upper and lower surfaces of the end of the horizontal plate away from the screw.

[0015] The support plate extends into the connecting frame through a slot and is movably connected to the connecting frame via a pin. One end of the support plate extending into the connecting frame is in close contact with the protrusion of the arc-shaped protrusion.

[0016] This invention also provides a method for strengthening a reinforced concrete frame structure using a seismic strengthening device, specifically including the following steps:

[0017] S1. Fix the first cross reinforcement inside the first frame, then insert the bottom of the second frame into the first frame, then fix the transverse reinforcement inside the second frame, fix the longitudinal reinforcement inside the transverse reinforcement, and then open and expand the bottom side of the longitudinal reinforcement before inserting it into the first frame.

[0018] S2. Then, concrete is poured into the first skeleton. After the concrete solidifies, the first concrete layer is formed. Then, concrete is poured into the second skeleton, the transverse reinforcement and the longitudinal reinforcement. After the concrete solidifies, the second concrete layer is formed.

[0019] S3. A portion of the top of the second frame, the transverse reinforcement and the longitudinal reinforcement is left unpoured with concrete, and a first frame is made on the top, so that the top side of the longitudinal reinforcement opens and expands and is inserted into the first frame, and then the first cross reinforcement is fixed in the first frame.

[0020] S4. Pour concrete into the unpoured portions of the second frame, transverse reinforcement and longitudinal reinforcement, and at the same time pour concrete into the first frame above, and wait for the concrete to solidify.

[0021] S5. Fix the reinforcing component to the outer side of the middle of the column, and then connect and fix the screws on the adjacent horizontal plates through the internal threaded cylinder. The internal threaded cylinder rotates and pulls the horizontal plate through the screw, so that the horizontal plate pushes the upper and lower support plates to open and support the frame. After the extrusion plate is fixed on the frame, it extrudes and supports the support plate on the frame surface. Finally, the two ends of the extrusion plate are welded and fixed to the support plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are: after the first frame is poured with concrete to form the first concrete layer, the first concrete layer can form an integral whole with the first cross reinforcement and the first frame, thereby enhancing the structural strength of the frame. In addition, the setting of the first cross reinforcement can improve the support of the first concrete layer, thereby further enhancing the structural strength of the frame.

[0023] The transverse reinforcements provide lateral support to the interior of the second frame, while the longitudinal reinforcements provide longitudinal support. In addition, the longitudinal reinforcements can further improve the robustness of the transverse reinforcements.

[0024] After the upper and lower ends of the longitudinal reinforcement expand to both sides, it is inserted into the corresponding first frame. This arrangement, after the first and second concrete layers solidify and form a whole, increases the size of the upper and lower ends of the column and the connection of the frame, thereby enhancing the structural strength of the connection between the column and the frame.

[0025] The extrusion plate between two adjacent support plates of the same height is fixed to the corresponding frame surface by expansion nails or other fasteners. The extrusion plate extrudes the two adjacent support plates of the same height, so that the end of the support plate that contacts the frame is firmly supported on the frame surface.

[0026] This design allows the columns to be connected to the frame via support plates, forming a triangular connection between the columns, support plates, and frame. This provides support to the frame, improves the stability of the connection between the columns and the frame, and prevents the frame from bending or deforming.

[0027] Meanwhile, adjacent columns can be connected and tightened with horizontal plates to effectively prevent the columns from bending and deforming outward. Attached Figure Description

[0028] Figure 1 This is an exploded structural diagram of the first skeleton, second skeleton, transverse reinforcement, longitudinal reinforcement, and frame of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the first skeleton of the present invention;

[0030] Figure 3 This is a three-dimensional structural diagram of the first cross-shaped reinforcing member of the present invention;

[0031] Figure 4 This is a three-dimensional structural diagram of the connection between the first cross-shaped reinforcing member and the first frame of the present invention;

[0032] Figure 5 This is a three-dimensional structural diagram of the second skeleton of the present invention;

[0033] Figure 6 This is a three-dimensional structural diagram of the transverse reinforcement of the present invention;

[0034] Figure 7 This is a three-dimensional structural diagram of the longitudinal reinforcement of the present invention;

[0035] Figure 8 This is a three-dimensional structural diagram of the connection between the second skeleton and the transverse reinforcement of the present invention;

[0036] Figure 9 This is a three-dimensional structural diagram of the connection between the transverse and longitudinal reinforcement members of the present invention;

[0037] Figure 10This is a three-dimensional structural diagram of the connection of the reinforcement member of the present invention;

[0038] Figure 11 This is a three-dimensional structural diagram of the entire invention;

[0039] Figure 12 This is an exploded structural diagram showing the connection between the reinforcing member, the cross plate, and the support plate of the present invention.

[0040] Figure 13 This is a cross-sectional structural diagram showing the connection between the connecting frame, the horizontal plate, the support plate, and the extrusion plate of the present invention.

[0041] In the diagram: 1. First frame; 101. Outer rectangular steel reinforcement; 102. First stirrup; 103. Inner rectangular steel reinforcement; 2. Second frame; 201. Second stirrup; 202. Vertical steel reinforcement; 3. Horizontal reinforcement; 301. Second cross plate; 302. Vertical connecting steel reinforcement; 303. Extension plate; 4. Longitudinal reinforcement; 401. Vertical plate; 402. Connecting plate; 403. Longitudinal steel reinforcement; 404. Expanded steel reinforcement; 5. 501. First cross reinforcement; 502. First cross plate; 503. Hook-shaped steel bar; 6. Frame; 7. Column; 8. Wrapping reinforcement; 81. Right-angle fastening plate; 82. Right-angle mounting base; 83. Bolt; 84. Connecting frame; 85. Slide groove; 86. Slot; 9. Horizontal plate; 91. Arc-shaped protrusion; 92. Sliding protrusion; 10. Support plate; 11. Extrusion plate; 12. Internal threaded cylinder; 13. Screw; 14. Pin. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figure 1-13 The present invention provides a technical solution:

[0044] Example 1:

[0045] A seismic reinforcement device for a reinforced concrete frame structure includes two sets of frames 6 and a column 7 at the corner connecting the two sets of frames 6. The frame 6 includes a first skeleton 1, a first cross-shaped reinforcing member 5 connected inside the first skeleton 1, and a first concrete layer poured and covering the outside of the first skeleton 1. The connection between the first cross-shaped reinforcing member 5 and the first skeleton 1 is covered by the first concrete layer.

[0046] In this way, after the first frame 1 is poured with concrete to form the first concrete layer, the first concrete layer can form an integral whole with the first cross reinforcement 5 and the first frame 1, thereby enhancing the structural strength of the frame 6. Furthermore, the setting of the first cross reinforcement 5 can improve the support of the first concrete layer, thereby further enhancing the structural strength of the frame 6.

[0047] The column 7 includes a second frame 2, a transverse reinforcement 3 inside the second frame 2, a longitudinal reinforcement 4 inside the transverse reinforcement 3, and a second concrete layer poured to cover the outside of the second frame 2, the transverse reinforcement 3 and the longitudinal reinforcement 4. The upper and lower ends of the longitudinal reinforcement 4 open and expand to the sides and are inserted into the corresponding first frame 1. The first concrete layer and the second concrete layer solidify to form an integral whole.

[0048] like Figure 8 As shown, the lateral reinforcement 3 provides lateral support for the interior of the second frame 2. Figure 9 As shown, the longitudinal reinforcement 4 provides longitudinal support for the interior of the second frame 2. At the same time, the longitudinal reinforcement 4 can further improve the robustness of the transverse reinforcement 3.

[0049] After the upper and lower ends of the longitudinal reinforcement 4 are opened and expanded to both sides, they are inserted into the corresponding first frame 1. This arrangement, after the first concrete layer and the second concrete layer solidify and form a whole, increases the size of the connection between the upper and lower ends of the column 7 and the frame 6, thereby enhancing the structural strength of the connection between the column 7 and the frame 6.

[0050] A wrapping reinforcement 8 is fixed to the outer side of the middle part of the column 7, and a horizontal plate 9 is slidably connected to the side of the wrapping reinforcement 8. A screw 13 is fixed to the end of the horizontal plate 9. The upper and lower parts of the side of the wrapping reinforcement 8 are movably connected to the support plate 10 through the pin 14. The screws 13 on the adjacent horizontal plates 9 are connected and fixed by the internal threaded cylinder 12. The rotation of the internal threaded cylinder 12 pulls the horizontal plate 9 through the screw 13, thereby causing the horizontal plate 9 to push the upper and lower support plates 10 to open and support the frame 6. A pressing plate 11 is also fixed between the adjacent support plates 10. After the pressing plate 11 is fixed on the frame 6, it presses and supports the support plate 10 on the surface of the frame 6.

[0051] The first frame 1 includes two sets of outer rectangular steel bars 101 arranged vertically, two sets of inner rectangular steel bars 103 arranged vertically, and several sets of first stirrups 102 fixed on the outside of the outer rectangular steel bars 101 and the inner rectangular steel bars 103, and the inner rectangular steel bars 103 are located inside the corresponding outer rectangular steel bars 101.

[0052] The first cross reinforcement 5 includes a first cross plate 501 and hook-shaped steel bars 502 connected to the ends of the four corners of the first cross plate 501. The hook-shaped steel bars 502 are used to hook onto the outer rectangular steel bar 101 and the inner rectangular steel bar 103, and the ends of the four corners of the first cross plate 501 are inserted into the interior of the first frame 1.

[0053] The upper hook-shaped steel bar 502 hooks onto the top of the upper outer rectangular steel bar 101 and inner rectangular steel bar 103, and the lower hook-shaped steel bar 502 hooks onto the bottom of the lower outer rectangular steel bar 101 and inner rectangular steel bar 103.

[0054] The second skeleton 2 includes four sets of vertical steel bars 202 arranged in a rectangular shape and second stirrups 201 that are sleeved and fixed on the outside of the four sets of vertical steel bars 202 at equal intervals.

[0055] The transverse reinforcement 3 includes two sets of upper and lower second cross plates 301 and two sets of left and right vertical connecting steel bars 302 connected between the upper and lower sets of second cross plates 301. The ends of the four corners of the second cross plate 301 are provided with extension plates 303. The second cross plate 301 is supported and fixed on the corresponding second stirrup 201. The upper second cross plate 301 is supported on the lower end of the upper first frame 1, and the lower second cross plate 301 is supported on the upper end of the lower first frame 1.

[0056] The longitudinal reinforcement 4 includes a vertical plate 401 fixed in the middle between the upper and lower sets of second cross plates 301 and connecting plates 402 fixed on both sides of the vertical plate 401. A longitudinal steel bar 403 is connected between the two sets of connecting plates 402 in the middle, and an expansion steel bar 404 is connected between the two sets of connecting plates 402 in the upper and lower parts. The ends of the expansion steel bars 404 in the upper and lower parts open and expand to both sides and are inserted into the corresponding first frame 1.

[0057] The wrapping reinforcement 8 includes a right-angle fastening plate 81 and a right-angle mounting base 82. The right-angle fastening plate 81 is wrapped around the outer corner of the column 7, and the right-angle mounting base 82 is wrapped around the inner corner of the column 7. The right-angle fastening plate 81 and the right-angle mounting base 82 are fastened together by bolts 83.

[0058] The right-angle mounting base 82 has a connecting frame 84 on its two outer sides. The horizontal plate 9 has sliding protrusions 92 on both sides of the end away from the screw 13. The sliding protrusions 92 slide in the sliding groove 85 on the inner wall of the connecting frame 84. The upper and lower surfaces of the end of the horizontal plate 9 away from the screw 13 are also provided with arc-shaped protrusions 91.

[0059] The support plate 10 extends into the interior of the connecting frame 84 via a slot 86 on the connecting frame 84 and is movably connected to the connecting frame 84 via a pin 14, with one end of the support plate 10 extending into the connecting frame 84 closely abutting the protrusion of the arc-shaped protrusion 91.

[0060] The outer surface of the internal threaded cylinder 12 is set in a regular hexagon. The internal threaded cylinder 12 can be rotated clockwise by a wrench, so that the screws 13 on both sides of the internal threaded cylinder 12 move into the internal threaded cylinder 12. At this time, the sliding protrusion 92 on the horizontal plate 9 moves along the sliding groove 85 to ensure that the screws 13 pull the horizontal plate 9 to move horizontally.

[0061] The protrusion of the arc-shaped protrusion 91 on the horizontal plate 9 is in close contact with the end of the support plate 10 that extends into the connecting frame 84, so that the upper and lower support plates 10 rotate and open around the pin 14 until the upper and lower support plates 10 open and are supported on the frame 6.

[0062] Then, the compression plate 11 between two adjacent support plates 10 of the same height is fixed to the surface of the corresponding frame 6 by expansion nails or other fasteners. The compression plate 11 compresses the two adjacent support plates 10 of the same height, so that the end of the support plate 10 that contacts the frame 6 is firmly supported on the surface of the frame 6.

[0063] This arrangement allows the column 7 to be connected to the frame 6 via the support plate 10, forming a triangular connection between the column 7, the support plate 10, and the frame 6. This provides support to the frame 6, improves the stability of the connection between the column 7 and the frame 6, and makes the frame 6 less prone to bending and deformation.

[0064] Meanwhile, adjacent columns 7 can be connected and tightened by horizontal plates 9, effectively preventing the columns 7 from bending and deforming outward.

[0065] This invention also provides a method for strengthening a reinforced concrete frame structure using a seismic strengthening device, specifically including the following steps:

[0066] S1. Fix the first cross reinforcement 5 inside the first frame 1, then insert the bottom of the second frame 2 into the first frame 1, then fix the transverse reinforcement 3 inside the second frame 2, fix the longitudinal reinforcement 4 inside the transverse reinforcement 3, and then open and expand the bottom side of the longitudinal reinforcement 4 and insert it into the first frame 1.

[0067] S2. Then, concrete is poured into the first frame 1. After the concrete solidifies, the first concrete layer is formed. Then, concrete is poured into the second frame 2, the transverse reinforcement 3 and the longitudinal reinforcement 4. After the concrete solidifies, the second concrete layer is formed.

[0068] S3, the second frame 2, the transverse reinforcement 3 and the longitudinal reinforcement 4 have a portion of space left unpoured concrete at the top, and the first frame 1 is made at the top, so that the top side of the longitudinal reinforcement 4 is opened and expanded and inserted into the first frame 1, and then the first cross reinforcement 5 is fixed in the first frame 1.

[0069] S4. Pour concrete into the unpoured portions of the top of the second frame 2, the transverse reinforcement 3 and the longitudinal reinforcement 4, and at the same time pour concrete into the first frame 1 above, and wait for the concrete to solidify.

[0070] S5. Fix the reinforcing member 8 to the outer side of the middle part of the column 7, and then connect and fix the screws 13 on the adjacent horizontal plates 9 through the internal threaded cylinder 12. The internal threaded cylinder 12 rotates and pulls the horizontal plate 9 through the screws 13, so that the horizontal plate 9 pushes the upper and lower support plates 10 to open and support the frame 6. After the extrusion plate 11 is fixed on the frame 6, it extrudes and supports the support plate 10 on the surface of the frame 6. Finally, the two ends of the extrusion plate 11 are welded and fixed to the support plate 10.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seismic reinforcement device for a reinforced concrete frame structure, comprising upper and lower frames and columns connecting the upper and lower frames at the corners, characterized in that: The frame includes a first skeleton, a first cross-shaped reinforcing member connected inside the first skeleton, and a first concrete layer poured and covering the outside of the first skeleton, with the connection between the first cross-shaped reinforcing member and the first skeleton covered by the first concrete layer. The column includes a second frame, a transverse reinforcement inside the second frame, a longitudinal reinforcement inside the transverse reinforcement, and a second concrete layer poured to cover the outside of the second frame, the transverse reinforcement, and the longitudinal reinforcement. The upper and lower ends of the longitudinal reinforcement expand to both sides and are inserted into the corresponding first frame. The first concrete layer and the second concrete layer solidify to form an integral whole. A wrapping reinforcement is fixed to the outer side of the middle part of the column, and a horizontal plate is slidably connected to the side of the wrapping reinforcement. A screw is fixed to the end of the horizontal plate. Support plates are movably connected to the upper and lower parts of the side of the wrapping reinforcement through pins. The screws on the adjacent horizontal plates are connected and fixed through an internal threaded cylinder. The rotation of the internal threaded cylinder pulls the horizontal plate through the screw, thereby causing the horizontal plate to push the upper and lower support plates to open and support on the frame. An extrusion plate is also fixed between the adjacent support plates. After the extrusion plate is fixed on the frame, it extrudes and supports the support plates on the frame surface. The wrapping reinforcement includes a right-angle fastening plate and a right-angle mounting base. The right-angle fastening plate wraps around the outer corner of the column, and the right-angle mounting base wraps around the inner corner of the column. The right-angle fastening plate and the right-angle mounting base are fastened together by bolts. The right-angle mounting base has connecting frames on its two outer sides, and sliding protrusions are provided on both sides of the end of the horizontal plate away from the screw. The sliding protrusions slide in the grooves of the inner wall of the connecting frame, and arc-shaped protrusions are also provided on the upper and lower surfaces of the end of the horizontal plate away from the screw. The support plate extends into the connecting frame through a slot and is movably connected to the connecting frame via a pin. One end of the support plate extending into the connecting frame is in close contact with the protrusion of the arc-shaped protrusion.

2. The seismic strengthening device for a reinforced concrete frame structure according to claim 1, characterized in that: The first frame includes two sets of outer rectangular steel bars arranged vertically, two sets of inner rectangular steel bars arranged vertically, and several sets of first stirrups fixed to the outside of the outer and inner rectangular steel bars, with the inner rectangular steel bars located inside the corresponding outer rectangular steel bars.

3. The seismic strengthening device for a reinforced concrete frame structure according to claim 2, characterized in that: The first cross reinforcement includes a first cross plate and hook-shaped steel bars connected to the ends of the four corners of the first cross plate. The hook-shaped steel bars are used to hook onto the outer rectangular steel bars and the inner rectangular steel bars, and the ends of the four corners of the first cross plate are inserted into the first frame.

4. The seismic strengthening device for a reinforced concrete frame structure according to claim 3, characterized in that: The upper hook-shaped steel bar hooks onto the top of the upper outer rectangular steel bar and the inner rectangular steel bar, while the lower hook-shaped steel bar hooks onto the bottom of the lower outer rectangular steel bar and the inner rectangular steel bar.

5. The seismic strengthening device for a reinforced concrete frame structure according to claim 1, characterized in that: The second skeleton includes four sets of vertical steel bars arranged in a rectangular shape, and second stirrups that are sleeved and fixed on the outside of the four sets of vertical steel bars at equal intervals.

6. The seismic strengthening device for a reinforced concrete frame structure according to claim 5, characterized in that: The transverse reinforcement includes two sets of upper and lower second cross plates and two sets of left and right vertical connecting steel bars connected between the upper and lower sets of second cross plates. The ends of the four corners of the second cross plate are provided with extension plates. The second cross plate is supported and fixed on the corresponding second stirrups. The upper second cross plate is supported on the lower end of the upper first frame, and the lower second cross plate is supported on the upper end of the lower first frame.

7. The seismic strengthening device for a reinforced concrete frame structure according to claim 6, characterized in that: The longitudinal reinforcement includes a vertical plate fixed in the middle between the upper and lower sets of second cross plates and connecting plates fixed on both sides of the vertical plate. Longitudinal steel bars are connected between the two sets of connecting plates in the middle, and expansion steel bars are connected between the upper and lower sets of connecting plates. The ends of the upper and lower expansion steel bars are opened and expanded to both sides and inserted into the corresponding first skeleton.

8. A method for strengthening a reinforced concrete frame structure according to any one of claims 1-7, characterized in that: Specifically, the following steps are included: S1. Fix the first cross reinforcement inside the first frame, then insert the bottom of the second frame into the first frame, then fix the transverse reinforcement inside the second frame, fix the longitudinal reinforcement inside the transverse reinforcement, and then open and expand the bottom side of the longitudinal reinforcement before inserting it into the first frame. S2. Then, concrete is poured into the first skeleton. After the concrete solidifies, the first concrete layer is formed. Then, concrete is poured into the second skeleton, the transverse reinforcement and the longitudinal reinforcement. After the concrete solidifies, the second concrete layer is formed. S3. A portion of the top of the second frame, the transverse reinforcement and the longitudinal reinforcement is left unpoured with concrete, and a first frame is made on the top, so that the top side of the longitudinal reinforcement opens and expands and is inserted into the first frame, and then the first cross reinforcement is fixed in the first frame. S4. Pour concrete into the unpoured portions of the second frame, transverse reinforcement and longitudinal reinforcement, and at the same time pour concrete into the first frame above, and wait for the concrete to solidify. S5. Fix the reinforcing component to the outer side of the middle of the column, and then connect and fix the screws on the adjacent horizontal plates through the internal threaded cylinder. The internal threaded cylinder rotates and pulls the horizontal plate through the screw, so that the horizontal plate pushes the upper and lower support plates to open and support the frame. After the extrusion plate is fixed on the frame, it extrudes and supports the support plate on the frame surface. Finally, the two ends of the extrusion plate are welded and fixed to the support plate.

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