A method for reinforcing buckling-restrained brace of existing plate column structure

Abstract

The application discloses a kind of buckling-restrained brace reinforcing method of existing plate column structure, comprising: step one: selecting the intermediate position of transverse side column and the intermediate position of longitudinal side column in the plate column structure system to be reinforced to set buckling-restrained brace;Step two: when the square column structure and the cylindrical structure determined in step one are calculated and determined, reinforcing the lower part of circular column is set to close steel plate with perimeter embedded part, which can be used as concrete pouring formwork;Step three: when the frame beam determined in step one is calculated and determined, newly added frame beam upper part is placed on the iron reinforcement;Step four: the buckling-restrained brace node plate is welded on the embedded part;The application is used for resisting lateral horizontal force by setting buckling-restrained brace, and the existing column at the place where buckling-restrained brace is set is reinforced by increasing section method, which can meet the setting of buckling-restrained brace embedded part, increase the lateral stiffness of the whole structure, improve the seismic capacity of the structure, and effectively prevent the instability damage of the original structure column.

Description

Technical Field

[0001] This invention relates to the field of existing structure reinforcement and vibration reduction technology, and more specifically, to a method for reinforcing existing plate-column structures with buckling-resistance braces. Background Technology

[0002] Slab-column flat slab structures were widely used in the early years of the People's Republic of China due to their high space utilization and low construction costs. However, with economic growth and urban development, the reinforcement and renovation of such buildings has become an increasingly important part of renovation projects. Slab-column buckling-restrained brace systems can improve the seismic performance of structures while avoiding excessive lateral stiffness that could lead to stress incompatibility with the existing structure. They play a unique role in improving the seismic performance of existing slab-column structures.

[0003] However, most current buckling-restrained braces (BRs) are designed for new concrete or steel structures, with very few designs for existing reinforced concrete slab-column structures. Furthermore, the inability to pre-embed gusset plates for BRs in existing structures makes connection even more difficult. Therefore, reliably connecting the gusset plates of BRs to the existing concrete structure is crucial, and their installation must be based on safety and reliability while meeting construction requirements. Thus, it is necessary to propose a method for strengthening existing slab-column structures with BRs to at least partially address the problems existing in current technologies. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a method for reinforcing buckling-restrained braces in existing plate-column structures, comprising:

[0006] Step 1: Select the middle position of the transverse edge frame and the middle position of the longitudinal edge frame in the plate-column structure system to be reinforced, and strengthen the beams and columns with buckling braces by increasing the cross section.

[0007] The buckling brace spacing is approximately 20m. The buckling brace model is selected based on the yield force and member length. The planar layout of the buckling braces should be simple, regular, and symmetrical, and the elevations should be interconnected.

[0008] The thickness of the lower concrete layer of the newly added frame beam can be reinforced according to the requirement that the beam height is about 1 / 10 of the span. The newly built frame beam can be extended by one span to the left and right of the buckling restraint support span.

[0009] The thickness of the square column structure and the cylindrical structure can be reinforced according to the requirement that the diameter or the side length of the column after reinforcement is about 1 / 10 of the column spacing;

[0010] In step two, during construction of the square column structure and the cylindrical structure determined in step one, a closed steel plate is arranged at the lower part of the reinforced column, which can be used as a concrete pouring formwork, and the remaining part of the formwork can be formed by two half-round wooden molds buckled together, and the closed steel plate is connected with the existing column through the force mode of the post-embedded steel bar combined with the shear key;

[0011] A buckling support embedded part is arranged at the lower part of the reinforced square column, which can also be used as a concrete pouring formwork, and the wooden mold is arranged vertically to enclose the concrete, the embedded part is connected with the existing column through the ordinary through-screw rod, and the screw rod is filled with embedded steel bar glue;

[0012] In step three, during construction of the frame beam determined in step one, a new concrete layer with a thickness of 100mm is arranged on the upper part of the frame beam to place the iron steel bar on the beam, and the position of the frame beam width outside the plate surface which is not protruding is leveled in the later period;

[0013] A frame beam buckling support embedded part composed of a shear key and a tensioning screw rod is arranged at the middle position of the beam, and the upper and lower sides of the existing concrete slab at this position need to be chiseled, and the pouring is carried out after the beam hoop passes through the slab and the upper and lower iron is arranged;

[0014] In step four, a double-face cut-out welding form is used in the middle part of the embedded part in steps two and three, and a buckling support node plate is welded on the embedded part, and stiffening plates are arranged at the two ends, 1 / 3 and 2 / 3 positions of the node plate, and the stiffening plates can be connected with the node plate and the embedded part by double-face angle welding;

[0015] The buckling support and the node plate are connected by on-site welding, the connection mode is double-face cut-out welding, and the position is adjusted slightly according to the site condition and a certain deformation spacing is reserved.

[0016] According to the buckling support reinforcement method of the existing slab column structure, in step one, after the new structure system is arranged, the structure is calculated and analyzed by elastic calculation and elastic-plastic calculation through the structure calculation software and the finite element analysis software, the indicators can be determined according to the steel support-reinforced concrete frame in the appendix G of the Building Seismic Design Specification (GB50011), the displacement angle limit value can be interpolated according to the frame structure and the frame-seismic wall structure, the damping ratio can be converted into equivalent damping ratio according to the proportion of the concrete frame part and the steel support part in the structure deformation energy, and the two ends of the inclined rod of the buckling support are calculated as hinged.

[0017] The method for reinforcing the buckling-restrained brace of the existing slab-column structure according to the embodiment of the present application, wherein the existing slab-column structure comprises the original slab-column structure floor, the existing square column and the existing round column located above and below, and the existing square column and the existing round column are located between the original slab-column structure floor;

[0018] The reinforcing structure of the buckling-restrained brace comprises the upper concrete layer of the new frame beam added to the upper side of the original slab-column structure floor, the lower concrete layer of the new frame beam added to the lower side of the original slab-column structure floor, the reinforcing layer of the existing square column added to the existing square column and the reinforcing layer of the existing round column added to the existing round column.

[0019] The method for reinforcing the buckling-restrained brace of the existing slab-column structure according to the embodiment of the present application, wherein the existing square column and the reinforcing layer of the existing square column form the square column structure, and the existing round column and the reinforcing layer of the existing round column form the round column structure.

[0020] The upper original slab-column structure floor, the upper concrete layer of the new frame beam and the lower concrete layer of the new frame beam form the upper frame beam, and the lower original slab-column structure floor, the upper concrete layer of the new frame beam and the lower concrete layer of the new frame beam form the lower frame beam.

[0021] The method for reinforcing the buckling-restrained brace of the existing slab-column structure according to the embodiment of the present application, wherein the middle position of the upper frame beam is provided with the upper reinforcing structure, the connecting positions of the lower frame beam and the square column structure and the round column structure are respectively provided with the lower reinforcing structure, the lower end of the square column structure is provided with the reinforcing structure of the square column, the lower end of the round column structure is provided with the reinforcing structure of the round column, and two buckling-restrained braces, wherein the upper end of one buckling-restrained brace is connected to the upper reinforcing structure, the lower end is connected to the round column structure and the corresponding one of the lower reinforcing structures, the upper end of the other buckling-restrained brace is connected to the upper reinforcing structure, and the lower end is connected to the square column structure and the corresponding other lower reinforcing structure, to form the "human" shaped support.

[0022] The method for reinforcing the buckling-restrained brace of the existing slab-column structure according to the embodiment of the present application, wherein the upper reinforcing structure comprises the frame beam buckling-restrained brace embedded parts located on the upper and lower sides of the upper frame beam respectively, and the frame beam buckling-restrained brace embedded parts are connected by the multiple through-passing through steel bars, wherein the frame beam buckling-restrained brace shear key is welded on the frame beam buckling-restrained brace embedded part on the lower side, the outer side is provided with the cross-shaped buckling-restrained brace joint plate and the buckling-restrained brace stiffening plate, the buckling-restrained brace joint plate is horizontally arranged, the buckling-restrained brace stiffening plate is vertically arranged, and the upper ends of the two buckling-restrained braces are respectively connected to the two sides of the buckling-restrained brace joint plate in the upper reinforcing structure.

[0023] The two lower reinforcing structures are identical in structure and each include frame beam buckling-restrained brace pre-embedded members respectively located on the upper and lower sides of the lower frame beam, and the frame beam buckling-restrained brace pre-embedded members are connected by a plurality of through steel bars.

[0024] The cylindrical reinforcing structure includes a concrete layer outer side circle embedded member closed steel plate located at the outer periphery of the existing cylindrical reinforcing layer, a plurality of frame cylindrical buckling-restrained brace shear keys pre-embedded in the inner side of the cylindrical structure, and a plurality of existing cylindrical buckling-restrained brace pre-embedded member anchor bars pre-embedded in the outer side of the cylindrical structure.

[0025] The cylindrical reinforcing structure includes a concrete layer outer side circle embedded member closed steel plate located at the outer periphery of the existing cylindrical reinforcing layer, a plurality of frame cylindrical buckling-restrained brace shear keys pre-embedded in the inner side of the cylindrical structure, and a plurality of existing cylindrical buckling-restrained brace pre-embedded member anchor bars pre-embedded in the outer side of the cylindrical structure.

[0026] According to the buckling-restrained brace reinforcing method for the existing slab-column structure, the existing square column reinforcing layer added to the existing square column and the existing cylindrical reinforcing layer added to the existing cylindrical column are reinforced by the section enlargement method.

[0027] The frame cylindrical buckling-restrained brace shear keys and the existing cylindrical buckling-restrained brace pre-embedded member anchor bars are welded with the concrete layer outer side circle embedded member closed steel plate to form an integral whole and are embedded in the cylindrical structure.

[0028] The upper surface and the lower surface of the original slab-column structure floor are roughened, the upper side is increased with a new frame beam upper concrete layer with a thickness of not less than 100 mm, and the lower part is increased with a new frame beam lower concrete layer to form a new frame beam.

[0029] Compared with the prior art, the present application at least includes the following beneficial effects:

[0030] Firstly, a seismic reinforcement method is provided for the slab-column structure without beams, and buckling supports are arranged to resist lateral horizontal forces, and the existing columns where the buckling supports are arranged are reinforced by the method of increasing the cross section, which can meet the requirements of arranging the buckling support preformed parts and increase the lateral stiffness of the structure as a whole, thereby improving the seismic capacity of the structure and effectively preventing the instability and damage of the original structure columns.

[0031] Secondly, a connection method of the buckling support node is provided for the circular column and the square column respectively, and the method of adding a frame beam on the floor for connecting the node of the buckling support is also specified, and the buckling support node is connected with the beam column through the shear key and the tension anchor rod, which effectively solves the problem that the horizontal force of the buckling support is large, thereby causing the shear to be large and the node design to be difficult.

[0032] Thirdly, the present application adopts the "inverted V" type buckling support method, which provides better and more effective support at the middle position.

[0033] The buckling support reinforcement method of the existing slab-column structure of the present application, other advantages, objects and features of the present application will be embodied in part through the following description, and part will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0035] Figure 1 It is a structural schematic diagram of the buckling support reinforcement structure of the existing slab-column structure of the present application.

[0036] Figure 2 It is a sectional view of the reinforcement position of the beam in the present application.

[0037] Figure 3 It is a sectional view of the reinforcement position of the circular column structure in the present application.

[0038] Figure 4 It is a sectional view of the reinforcement position of the square column structure in the present application. DETAILED DESCRIPTION

[0039] The present application will be further described in detail below in combination with the drawings and embodiments, so that those skilled in the art can implement the present application according to the description.

[0040] It should be understood that the terms such as "have", "include" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0041] As shown in Figure 1 , the present application provides a buckling-restrained brace reinforcement method for existing slab-column structure, the existing slab-column structure includes original slab-column structure floor 11, existing square column 20 and existing circular column 22 located on the upper and lower sides, the existing square column 20 and the existing circular column 22 are located between the original slab-column structure floor 11, the buckling-restrained brace reinforcement structure includes the newly added frame beam upper concrete layer 12 added to the upper side of the original slab-column structure floor 11, the newly added frame beam lower concrete layer 13 added to the lower side of the original slab-column structure floor 11, the existing square column reinforcement layer 21 added to the existing square column 20 and the existing circular column reinforcement layer 23 added to the existing circular column 22, the existing square column 20 and the existing square column reinforcement layer 21 form Figure 1 the square column structure 101 as shown, the existing circular column 22 and the existing circular column reinforcement layer 23 form Figure 1 the circular column structure 102 as shown, the original slab-column structure floor 11 and the newly added frame beam upper concrete layer 12 and the newly added frame beam lower concrete layer 13 on the upper side form an upper frame beam, the original slab-column structure floor 11 and the newly added frame beam upper concrete layer 12 and the newly added frame beam lower concrete layer 13 on the lower side form a lower frame beam, wherein the middle position of the upper frame beam is provided with an upper reinforcement structure, the connection positions of the lower frame beam with the square column structure and the circular column structure are respectively provided with a lower reinforcement structure, the lower end of the square column structure is provided with a square column reinforcement structure, the lower end of the circular column structure is provided with a circular column reinforcement structure, and two buckling-restrained braces 19, one of which is connected at the upper end to the upper reinforcement structure and at the lower end to the circular column structure 102 and the corresponding one of the lower reinforcement structures, and the other of which is connected at the upper end to the upper reinforcement structure and at the lower end to the square column structure 101 and the corresponding other of the lower reinforcement structures, to form a "person" shaped support.

[0042] At the same time, referring to Figure 2 , the upper reinforcement structure includes frame beam buckling-restrained brace embedded parts 14B respectively located on the upper and lower sides of the upper frame beam, the frame beam buckling-restrained brace embedded parts 14B are connected by a plurality of through-passing through steel bars 15, wherein a frame beam buckling-restrained brace shear key 16A is welded on the frame beam buckling-restrained brace embedded part 14B on the lower side, and a cross-shaped buckling-restrained brace node plate 17 and a buckling-restrained brace stiffening plate 18 are provided on the outer side, as shown in Figure 2 , the buckling-restrained brace node plate 17 is transversely arranged, the buckling-restrained brace stiffening plate 18 is vertically arranged, and the upper ends of the two buckling-restrained braces 19 are respectively connected to the two sides of the buckling-restrained brace node plate 17 in the upper reinforcement structure.

[0043] The two lower reinforcement structures are identical in structure and each comprises frame beam buckling-restrained brace pre-embedded members 14B located on the upper and lower sides of the lower frame beam, and the frame beam buckling-restrained brace pre-embedded members 14B are connected by a plurality of through steel bars 15.

[0044] Referring to Figure 3 , the cylindrical reinforcement structure comprises a concrete layer outer lateral circumferential embedded member enclosing steel plate 14C located outside the existing cylindrical reinforcement layer 23, a plurality of frame cylindrical buckling-restrained brace shear keys 16B pre-embedded inside the cylindrical structure 102, and a plurality of existing cylindrical buckling-restrained brace pre-embedded member anchor bars 24 pre-embedded outside the cylindrical structure 102, and Figure 3 , in a specific embodiment, the frame cylindrical buckling-restrained brace shear keys 16B are arranged in multiple rows, and each row comprises three frame cylindrical buckling-restrained brace shear keys arranged at an angle of 60 degrees, and the existing cylindrical buckling-restrained brace pre-embedded member anchor bars 24 are arranged in multiple rows, and each row comprises three existing cylindrical buckling-restrained brace pre-embedded member anchor bars arranged at an angle of 60 degrees.

[0045] The cylindrical reinforcement structure comprises a buckling-restrained brace node plate 17 connected to the frame beam buckling-restrained brace pre-embedded members 14B and the concrete layer outer lateral circumferential embedded member enclosing steel plate 14C of one of the lower reinforcement structures, and a plurality of buckling-restrained brace stiffening plates 18, the buckling-restrained brace node plate 17 is arranged transversely, and the buckling-restrained brace stiffening plates 18 are arranged vertically on the frame beam buckling-restrained brace pre-embedded members 14B and the concrete layer outer lateral circumferential embedded member enclosing steel plate 14C, respectively, and one of the buckling-restrained braces 19 is connected to the buckling-restrained brace node plate 17 of the cylindrical reinforcement structure at the lower end.

[0046] Referring to Figure 4 , the square column reinforcement structure comprises frame column buckling-restrained brace pre-embedded members 14A located on both sides of the existing square column reinforcement layer 21 and through steel bars connecting the frame column buckling-restrained brace pre-embedded members 14A on both sides.

[0047] The square column reinforcement structure comprises a buckling-restrained brace node plate 17 connected to the frame beam buckling-restrained brace pre-embedded members 14B and the frame column buckling-restrained brace pre-embedded members 14A of the other lower reinforcement structure, and a plurality of buckling-restrained brace stiffening plates 18, the buckling-restrained brace node plate 17 is arranged transversely, and the buckling-restrained brace stiffening plates 18 are arranged vertically on the frame beam buckling-restrained brace pre-embedded members 14B and the frame column buckling-restrained brace pre-embedded members 14A, respectively, and the other buckling-restrained brace 19 is connected to the buckling-restrained brace node plate 17 of the square column reinforcement structure at the lower end.

[0048] The existing square column reinforcement layer 21 added to the existing square column 20 and the existing cylindrical reinforcement layer 23 added to the existing cylindrical column 22 are reinforced by the method of increasing the cross section, that is, the outer concrete of the existing square column 20 and the existing cylindrical column 22 is chiseled to increase the existing square column reinforcement layer 21 and the existing cylindrical reinforcement layer 23 by not less than 100 mm.

[0049] The frame cylindrical buckling-restrained brace shear key 16B and the existing cylindrical buckling-restrained brace embedded anchor 24 are welded with the concrete layer outside circumferential embedded closing steel plate 14C to form an integral whole and are embedded in the cylindrical structure.

[0050] The upper surface and the lower surface of the original slab-column structure floor 11 are chiseled, the upper part of the new frame beam is increased by the new frame beam upper concrete layer 12 with a thickness of not less than 100 mm, and the lower part is increased by the new frame beam lower concrete layer 13, so as to form the new frame beam.

[0051] The existing slab-column structure buckling-restrained brace reinforcement method of the application comprises the following steps:

[0052] Step one: select the middle position of the transverse side column and the middle position of the longitudinal side column in the slab-column structure system to be reinforced to set the buckling-restrained brace, and reinforce the beam column with buckling-restrained brace according to the enlarged section method shown in Figure 1. The spacing of the buckling-restrained brace is about 20 m, the type of the buckling-restrained brace is selected according to the yield force and the length of the bar, the plane arrangement of the buckling-restrained brace should be simple, regular and symmetrical, and the elevation should be interconnected. The thickness of the new frame beam lower concrete layer 13 can be reinforced according to the requirement that the beam height is about 1 / 10 of the span, and the new frame beam can be extended by one span on the left and right of the buckling-restrained brace span. The thickness of the square column structure 101 and the cylindrical structure 102 can be reinforced according to the requirement that the diameter or side length of the column after reinforcement is about 1 / 10 of the column spacing.

[0053] After the new structure system is arranged, the structure is calculated and analyzed by elastic calculation and elastic-plastic calculation through the structure calculation software and the finite element analysis software, the indicators can be determined according to the appendix G steel support-reinforced concrete frame in the “Building Seismic Design Specification” (GB50011), the displacement angle limit value can be interpolated according to the frame structure and the frame-seismic wall structure, the damping ratio can be converted into the equivalent damping ratio according to the proportion of the deformation energy of the concrete frame part and the steel support part, and the two ends of the inclined rod of the buckling-restrained brace are calculated as hinged.

[0054] Step two: during the construction of the cylindrical structure and the square column structure determined in step one, the circumferential embedded closing steel plate 14C is arranged at the lower part of the reinforced column, the steel plate can be used as a concrete pouring formwork, the remaining part of the formwork can be formed by buckling two half-round wooden forms, the closing steel plate 14C is connected with the existing column through the force combination of the post-embedded steel bar and the shear key;

[0055] The buckling-restrained brace embedded part 14A is arranged at the lower part of the reinforced square column and can be used as a concrete pouring formwork, the wooden form is arranged in the vertical direction to surround and pour the concrete, the embedded part 14A is connected with the existing column through the ordinary through-screw rod, and the screw rod is filled with post-embedded steel bar glue.

[0056] Step three: when the frame beam determined in step one is constructed, the thickness of the upper concrete layer of the new frame beam is 100mm for placing the upper iron reinforcement, and the position of the frame beam width outside the plate surface is not protruding, which can be leveled by the building layer later;

[0057] The frame beam buckling-restrained brace pre-embedded part 14B composed of a shear key and a tension rod is arranged at the middle position of the beam, and the upper and lower sides of the existing concrete slab at the position need to be chiseled, and pouring is performed after the beam hoop reinforcement, upper iron and lower iron are arranged.

[0058] Step four: the buckling-restrained brace node plate 17 is welded on the pre-embedded part in the middle of the position of the pre-embedded part arranged in steps two and three in the form of double-face cut-out welding, the stiffener plates are arranged at the two ends, the middle 1 / 3 and the middle 2 / 3 positions of the node plate, and the stiffener plates and the node plate and the pre-embedded part can be connected by double-face fillet welding; the buckling-restrained brace is welded and connected with the node plate on site, the connection mode is double-face cut-out welding, the position is adjusted slightly according to the on-site situation, and a certain deformation spacing is reserved.

[0059] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0060] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] Although the embodiments of the present application have been disclosed as above, they are not limited to only the applications listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to the specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A method for reinforcing existing plate-column structures with buckling-restrained braces, characterized in that, Comprise: Step one: select the intermediate position of the transverse side column and the intermediate position of the longitudinal side column in the plate column structure system to be reinforced to set the buckling support, and reinforce the beam column with the set buckling support by the method of increasing section; The distance between the buckling supports is 20m, the type of the buckling support is selected according to the yield force and the length of the rod, and the plane arrangement of the buckling support should be simple, regular and symmetrical, and the elevation should be mutually penetrated; The thickness of the newly added frame beam lower concrete layer (13) is reinforced according to the requirement that the beam height is 1 / 10 of the span, the newly built frame beam is extended by one span on the left and right sides of the buckling restrained brace span; The thickness of the square column structure (101) and the circular column structure (102) is reinforced according to the requirement that the diameter or side length of the column after reinforcement is 1 / 10 of the column spacing; Step two: during the construction of the square column structure (101) and the circular column structure (102) determined in step one, a circular embedded part closure steel plate (14C) is set at the lower part of the reinforced column, which is used as a concrete pouring formwork, the remaining part of the formwork adopts a two half circle wooden formwork buckling mode, the closure steel plate (14C) is connected with the existing column through the force form of the post-planting steel bar combined with the shear key; A buckling support embedded part (14A) is set at the lower part of the reinforced square column, which is used as a concrete pouring formwork, the vertical direction is set with a wooden formwork to enclose the post-poured concrete, the embedded part (14A) is connected with the existing column through ordinary through-screws, and the screw rod is filled with post-planting glue; Step three: during the construction of the frame beam determined in step one, the thickness of the newly added frame beam upper concrete layer is 100mm, which is used to place the iron steel bar on the beam, the position of the frame beam width outside the board surface height which is not protruding, and the building layer is leveled in the later period; A frame beam anti-buckling support embedded part (14B) composed of a shear key and a tensioning screw rod is set at the middle position of the beam, the upper and lower sides of the existing concrete slab at this position need to be chiseled, and the pouring is carried out after the beam hoop passes through the floor and the upper and lower iron is set; Step four: the anti-buckling support node plate (17) is welded on the embedded part at the middle part of the position of the embedded part in steps two and three by using double-sided cutout welding, stiffening plates are set at both ends, 1 / 3 and 2 / 3 of the node plate, and the stiffening plates are connected with the node plate and the embedded part by double-sided fillet welding; The buckling support and the node plate are connected by site welding, the connection mode is double-sided cutout welding, the position is adjusted slightly according to the site condition and a certain deformation spacing is reserved.

2. The buckling-resistance bracing reinforcement method for existing plate-column structures according to claim 1, characterized in that, In step one, after the new structure system is arranged, the structure is calculated and analyzed by elastic calculation and elastic-plastic calculation software, the indicators are determined according to the appendix G steel support-reinforced concrete frame in the "Code for seismic design of buildings" (GB50011), the displacement angle limit is interpolated according to the frame structure and frame-seismic wall structure; the damping ratio is converted into equivalent damping ratio according to the proportion of the deformation energy of the concrete frame part and the steel support part; the two ends of the inclined rod of the buckling support are calculated as hinged.

3. The buckling-resistance bracing reinforcement method for existing plate-column structures according to claim 1, characterized in that, The existing plate column structure comprises original plate column structure floor slabs (11) located above and below, existing square columns (20) and existing circular columns (22), and the existing square columns (20) and the existing circular columns (22) are located between the original plate column structure floor slabs (11); The buckling-restrained brace reinforcement structure comprises a newly-added frame beam upper concrete layer (12) added to the upper side of the original slab-column structure floor (11), a newly-added frame beam lower concrete layer (13) added to the lower side of the original slab-column structure floor (11), a existing square column reinforcement layer (21) added to the existing square column (20), and a existing circular column reinforcement layer (23) added to the existing circular column (22).

4. The buckling-resistance bracing reinforcement method for existing plate-column structures according to claim 3, characterized in that, The existing square column (20) and the existing square column reinforcement layer (21) form the square column structure (101), and the existing circular column (22) and the existing circular column reinforcement layer (23) form the circular column structure (102). The original slab-column structure floor (11) above, the newly-added frame beam upper concrete layer (12), and the newly-added frame beam lower concrete layer (13) form an upper frame beam, and the original slab-column structure floor (11) below, the newly-added frame beam upper concrete layer (12), and the newly-added frame beam lower concrete layer (13) form a lower frame beam.

5. The buckling-resistance bracing reinforcement method for existing plate-column structures according to claim 4, characterized in that, The middle position of the upper frame beam is provided with an upper reinforcement structure, the connection positions of the lower frame beam and the square column structure (101) and the circular column structure (102) are respectively provided with lower reinforcement structures, the lower end of the square column structure (101) is provided with a square column reinforcement structure, the lower end of the circular column structure (102) is provided with a circular column reinforcement structure, and two buckling-restrained braces (19) are arranged, one upper end of which is connected to the upper reinforcement structure, and the other upper end of which is connected to the circular column structure (102) and the corresponding one of the lower reinforcement structures, and the other lower end of which is connected to the square column structure (101) and the corresponding other of the lower reinforcement structures, so as to form a "human" shaped support.

6. The buckling-restrained brace reinforcement method for existing plate-column structures according to claim 5, characterized in that, The upper reinforcement structure comprises frame beam buckling-restrained brace embedded parts (14B) arranged on the upper and lower sides of the upper frame beam, respectively, and the frame beam buckling-restrained brace embedded parts (14B) are connected by a plurality of penetrating through steel bars (15), wherein a frame beam buckling-restrained brace shear key (16A) is welded on the frame beam buckling-restrained brace embedded part (14B) on the lower side, and a cross-shaped buckling-restrained brace node plate (17) and a buckling-restrained brace stiffener plate (18) are arranged on the outer side, the buckling-restrained brace node plate (17) is arranged horizontally, the buckling-restrained brace stiffener plate (18) is arranged vertically, and the upper ends of the two buckling-restrained braces (19) are respectively connected to the two sides of the buckling-restrained brace node plate (17) in the upper reinforcement structure.

7. The buckling-restrained brace reinforcement method for existing plate-column structures according to claim 6, characterized in that, The two lower reinforcement structures are the same in structure, and each comprises frame beam buckling-restrained brace embedded parts (14B) arranged on the upper and lower sides of the lower frame beam, respectively, and the frame beam buckling-restrained brace embedded parts (14B) are also connected by a plurality of penetrating through steel bars (15).

8. A method for reinforcing existing plate-column structures with buckling-restrained braces according to claim 5, characterized in that, The cylindrical reinforcement structure includes a concrete layer outside circumferential ring embedded part closing steel plate (14C) located at the periphery of the existing cylindrical reinforcement layer (23), a plurality of frame cylindrical buckling-restrained brace shear keys (16B) pre-embedded in the inside of the cylindrical structure (102), and a plurality of existing cylindrical buckling-restrained brace embedded anchor bars (24) pre-embedded on the outside of the cylindrical structure (102), wherein the cylindrical reinforcement structure is connected to the buckling-restrained brace node plate (17) and the plurality of buckling-restrained brace stiffening plates (18) of one of the following reinforcement structures, the buckling-restrained brace node plate (17) is transversely arranged, and the buckling-restrained brace stiffening plates (18) are vertically arranged on the frame beam buckling-restrained brace embedded part (14B) and the concrete layer outside circumferential ring embedded part closing steel plate (14C), respectively, and the lower end of one buckling-restrained brace (19) is connected to the buckling-restrained brace node plate (17) of the cylindrical reinforcement structure.

9. A method for reinforcing an existing slab-column structure with buckling-restrained braces according to claim 5, characterized in that, The square column reinforcement structure includes frame column buckling-restrained brace embedded parts (14A) located on both sides of the existing square column reinforcement layer (21) and through steel bars connecting the frame column buckling-restrained brace embedded parts (14A) on both sides, wherein the square column reinforcement structure is connected to the buckling-restrained brace node plate (17) and the plurality of buckling-restrained brace stiffening plates (18) of the other reinforcement structure, the buckling-restrained brace node plate (17) is transversely arranged, and the buckling-restrained brace stiffening plates (18) are vertically arranged on the frame beam buckling-restrained brace embedded part (14B) and the frame column buckling-restrained brace embedded part (14A), respectively, and the lower end of the other buckling-restrained brace (19) is connected to the buckling-restrained brace node plate (17) of the square column reinforcement structure.

10. A method for reinforcing an existing slab-column structure with buckling-restrained bracing according to claim 5, characterized in that, The existing square column reinforcement layer (21) added to the existing square column (20) and the existing cylindrical reinforcement layer (23) added to the existing cylindrical column (22) are reinforced by the enlarged section method; Wherein, the frame cylindrical buckling-restrained brace shear key (16B) and the existing cylindrical buckling-restrained brace embedded anchor bar (24) are welded with the concrete layer outside circumferential ring embedded part closing steel plate (14C) as a whole and embedded in the cylindrical structure; Wherein, the original slab-column structure floor (11) is chiseled on the upper and lower surfaces of the concrete, the upper part is increased by not less than 100mm thick new frame beam upper concrete layer (12), and the lower part is increased by new frame beam lower concrete layer (13) to form new frame beams.

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