Reinforcing method of H-shaped steel column

Abstract

The invention relates to a method for reinforcing an H-shaped steel column, belongs to the technical field of steel structure reinforcement, and solves one of the problems that open fire is needed, procedures are tedious, the period is long and the dead weight of a structure is increased in welding reinforcement and encased concrete reinforcement in the prior art. The reinforcing method comprises the following steps that S1, a special-shaped supporting plate module (1) is installed so as to reinforce a second surface (324) of a flange (32) of an H-shaped steel column (3); s2, an auxiliary reinforcing module (2) is installed so as to reinforce a fourth surface (311) of a web (31) of the H-shaped steel column (3); and S3, adjusting to a clamping state so as to reinforce the first surface (323) of the flange (32) of the H-shaped steel column (3). The special-shaped supporting plate module (1) and the auxiliary reinforcing module (2) are adopted, the H-shaped steel column is reinforced, welding ignition is not needed, and construction is not limited; assembly is simple, consumed time is short, and dead weight increase is little.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure reinforcement, in particular to a reinforcing method for H-shaped steel columns. BACKGROUND

[0002] Under the background of industrial production transformation and upgrading and the rapid popularization of intelligent technology, a large number of existing factory buildings are facing the problem of insufficient structural performance, which cannot adapt to the higher requirements of new processes and new equipment on the bearing capacity, stiffness and stability of building structures. As the core load-bearing component of the steel structure of the factory building, the H-shaped steel column is prone to safety hazards such as bearing capacity decline and excessive deformation during long-term service due to factors such as load increase, corrosion and aging, and initial design defects.

[0003] The existing H-shaped steel column reinforcement technology has many limitations: the traditional welding reinforcement method requires on-site open flame operation, is greatly limited by the construction environment, and is prone to welding residual stress, affecting the mechanical properties of the component; the concrete wrapping reinforcement method has a long construction period, complicated process, and significantly increases the structural self-weight.

[0004] Therefore, it is urgent to develop an H-shaped steel column reinforcement technology that is convenient to construct, does not require open flame, has reliable reinforcement effect, and can adapt to different working conditions, in order to meet the actual needs of the structural renovation of existing factory buildings and respond to urban renewal and sustainable development of buildings. SUMMARY

[0005] In view of the above analysis, the present application aims to provide a reinforcing method for H-shaped steel columns to solve one of the problems of the welding reinforcement and concrete wrapping reinforcement in the prior art, i.e. the need for open flame, complicated process, long period and increased structural self-weight.

[0006] The present application provides a reinforcing method for H-shaped steel columns, which comprises the following steps:

[0007] S1: installing a special-shaped support plate module to reinforce the second surface of the H-shaped steel column; S2: installing an auxiliary reinforcement module to reinforce the fourth surface of the H-shaped steel column; S3: adjusting to a clamped state to reinforce the first surface of the H-shaped steel column.

[0008] Further, in step S1, the special-shaped support plate module is provided with two groups, which enter the interior of the H-shaped steel column from both sides of the H-shaped steel column.

[0009] Further, step S1 specifically comprises: S11: each group of special-shaped support plate modules comprises two special-shaped support plates, which are symmetrically placed on the same side of the web of the H-shaped steel column; S12: installing a strut and a push nut; S13: applying a pre-tightening force to the two special-shaped support plates.

[0010] Further, step S11 specifically involves: the strut mounting plates of the two irregular support plates facing each other, and the web plates of the two irregular support plates being close to the fourth surface of the H-shaped steel column.

[0011] Further, step S12 specifically involves: first, fitting two push nuts onto the support rod and positioning them near the middle of the support rod; then, installing both ends of the support rod into the support rod holes on the two irregular support plates respectively; and finally, positioning the push nuts between the two irregular support plates after installation.

[0012] Further, step S13 specifically involves: tightening each push nut to push the two irregular support plates away from each other until each irregular support plate is firmly attached to the second surface of the H-shaped steel column.

[0013] Further, S2 specifically includes: S21: connecting the four adjustable preload supports to the beams and slabs of the original building structure through chemical anchors or mechanical anchors; S22: setting the rod ends of the cross-hinged unit at the bottom of the cross-hinged rod group series mechanism on the adjustable preload supports.

[0014] Furthermore, in step S21, the beams and slabs of the original building structure are located at the bottom and / or top of the H-shaped steel columns.

[0015] Further, step S22 specifically involves: passing the end of the rod of the bottom cross-hinged unit through the pre-drilled hole of the hinge rod in the irregular support plate, extending it between the two vertical plates of the adjustable pre-tightening support, and locking it by passing the guide groove through the through hole of the rod end with the locking bolt.

[0016] Furthermore, step S2 also includes: S23: sequentially assembling cross-hinged units upward through the flange clamping and fastening mechanism to form a cross-hinged rod group series mechanism.

[0017] Furthermore, the H-shaped steel columns are reinforced using a strengthening device.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: (1) The reinforcement method for H-shaped steel columns of the present invention achieves multi-dimensional constraint and load-bearing capacity enhancement of H-shaped steel columns by using irregular support plate modules (irregular support plates, struts, push nuts) and auxiliary reinforcement modules. Among them, the irregular support plate adopts an irregular steel structure, and through the synergistic effect of the web bonding plate, strut mounting plate, hinge rod assembly mounting plate, and flange bonding plate, it is tightly attached to the second surface of the H-shaped steel column; the auxiliary reinforcement module is tightly attached to the first surface of the H-shaped steel column, and at the same time, it causes the irregular support plate to be tightly attached to the fourth surface of the H-shaped steel column; the irregular support plate module and the auxiliary reinforcement module together increase the cross-sectional area of ​​the steel column, thereby improving the anti-lateral displacement capacity and overall load-bearing performance of the H-shaped steel column.

[0019] (2) The reinforcement method of the H-shaped steel column of the present invention enhances the pre-tightening force and the synergistic force-bearing effect through the auxiliary reinforcement module: the auxiliary reinforcement module is composed of multiple cross-hinged units hinged together, and with the locking bolts and guide grooves of the adjustable pre-tightening support, the cross-hinged units are synchronously deformed by hydraulic drive, and a uniform pre-tightening force is applied to the irregular support plate module, which solves the problem of loose contact between the irregular support plate module and the steel column; the base plate, vertical plate and vertical plate stiffening rib of the adjustable pre-tightening support constitute a stable support structure, and the adjustable pre-tightening support set at the bottom (and the top of the high steel column) forms a two-way constraint, reducing the longitudinal deformation of the high steel column and improving the overall stability of the reinforcement; the lever arm design of the bottom cross-hinged unit uses the lever principle to reduce the driving force and simplify the construction operation; a 5-10mm gap is reserved between the web plate and the third surface of the H-shaped steel column, so that the tension of the auxiliary reinforcement module is only transmitted to the hinge rod assembly mounting plate, so that the fourth surface of the H-shaped steel column is tightly compressed, reducing the dispersion and weakening of the tension, and improving the shear bearing capacity of the web.

[0020] (3) In the reinforcement method of the H-shaped steel column of the present invention, the struts are evenly distributed along the length direction of the irregular support plate, and the two irregular support plates are tightened in the opposite direction with the push nut, so that the irregular support plate is closely attached to the second surface of the flange, effectively restraining the local instability of the flange, and the L-shaped strut hole reduces the difficulty of installation deviation adaptation.

[0021] (4) In the reinforcement method of the H-shaped steel column of the present invention, the main reinforcing rib and the auxiliary reinforcing rib enhance the rigidity and stress dispersion capability of the device itself; the main reinforcing rib is set in groups corresponding to the struts, and the trapezoidal structure connects the strut mounting plate and the flange bonding plate, which solves the stress concentration problem near the strut force application point, reduces the local buckling of the irregular support plate, and improves the overall bearing rigidity; the auxiliary reinforcing rib is set on the inner side of the corner of the hinged rod group mounting plate and the flange bonding plate, and the right-angled triangular structure strengthens the corner connection strength, and forms an overlapping force area with the main reinforcing rib, constructing a continuous stress transmission path, and improving the corner strength reliability and torsional performance.

[0022] (5) The flange first surface is tightly constrained by the flange clamping fastening mechanism and the thinning design of the hinge rod: The rectangular head cylindrical bolt, locking nut and wedge-shaped pad with right angle snap-fit ​​surface of the flange clamping fastening mechanism are connected to the web plate and the strut mounting plate in a two-way snap-fit, which further presses the auxiliary reinforcing module to the flange first surface, forming an internal and external two-way constraint system, which significantly improves the local stability of the flange; The design of thinning the end of the hinge rod on one side and thinning the middle of the rod on both sides makes the overall thickness of the X-shaped unit uniform after hinge, and the middle hinge shaft does not protrude, ensuring that the auxiliary reinforcing module is tightly attached to the flange first surface, reducing structural interference and affecting the transmission of reinforcing force.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Figure 1 This is a schematic flowchart of the method for strengthening H-shaped steel columns according to the present invention; Figure 2 This is a schematic diagram of the reinforcing device for the H-shaped steel column of the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 for Figure 3 A schematic diagram of the cross-section; Figure 5 A partial structural diagram of an irregularly shaped support plate; Figure 6 A partial structural diagram of the cross-hinged unit used to assist the reinforcement module. Figure 7 This is a schematic diagram of the adjustable preload support. Figure 8 Exploded view of the adjustable preload support; Figure 9 This is a schematic diagram of the flange clamping and fastening mechanism; Figure 10 This is an exploded view of the flange clamping mechanism.

[0025] Figure label: 1-Irregular support plate module; 11-Irregular support plate; 111-Strut mounting plate; 112-Web plate bonding plate; 113-Flange bonding plate; 114-Hinge rod assembly mounting plate; 115-Main reinforcing rib; 116-Auxiliary reinforcing rib; 117-Hinge rod reserved hole; 118-Strut hole; 12-Strut; 13-Push nut; 2-Auxiliary reinforcing module; 21-Cross hinge rod assembly series mechanism; 211-Hinge rod; 2111-Rod end; 2112-Rod middle; 212-Middle hinge shaft; 22-Adjustable preload support; 22 1-Base plate; 222-Vertical plate; 223-Guide groove; 224-Locking bolt; 225-Vertical plate stiffening rib; 23-Flange clamping fastening mechanism; 231-Rectangular head cylindrical bolt; 232-Locking nut; 233-Wedge-shaped pad; 2331-Side protrusion; 2332-First mating surface; 2333-Second mating surface; 3-H-shaped steel column; 31-Web plate; 311-Fourth surface; 32-Flange; 321-Upper flange; 322-Lower flange; 323-First surface; 324-Second surface; 325-Third surface. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0027] Example 1 A specific embodiment of the present invention, such as Figure 1 As shown, a method for strengthening an H-shaped steel column is disclosed. The method includes the following steps: S1: Install a special-shaped support plate module 1 to strengthen the second surface 324 of the H-shaped steel column 3; S2: Install an auxiliary strengthening module 2 to strengthen the fourth surface 311 of the H-shaped steel column 3; S3: Adjust to the clamping state to strengthen the first surface 323 of the H-shaped steel column 3.

[0028] The H-shaped steel column 3 involved in this invention, such as Figure 2 , Figure 3 As shown, the structure includes a web 31 and flanges 32. The flanges 32 include an upper flange 321 and a lower flange 322. The middle portions of the upper and lower flanges 321 and 322 are connected to one end of the web 31, forming an H-shape. The flanges 32 include a first surface 323 facing outwards, a second surface 324 facing inwards, and a third surface 325 connecting the first surface 323 and the second surface 324. The web 31 has two side surfaces, forming a fourth surface 311.

[0029] Step S1 specifically includes: S11: Two irregular support plates 11 are placed symmetrically on the same side of the web 31 of the H-shaped steel column 3, such that the hinge rod assembly mounting plate 114 is close to the third surface 325 of the H-shaped steel column 3, the flange bonding plate 113 is bonded to the second surface 324 of the H-shaped steel column 3, and the web bonding plate 112 is bonded to the fourth surface 311 of the H-shaped steel column 3; another set of irregular support plates 11 are placed symmetrically on the other side of the web 31 of the H-shaped steel column 3. S12: Install the support rod 12 and the push nut 13. Specifically, first, put the two push nuts 13 onto the support rod 12 and position them near the middle of the support rod 12. Then, install the two ends of the support rod 12 into the support rod holes 118 on the two irregular support plates 11 respectively. After installation, the push nuts 13 are located between the two irregular support plates 11 and are used to push the two irregular support plates 11 in the opposite direction. S13: Apply preload to the two irregular support plates 11 by tightening each push nut 13 to push the two irregular support plates 11 away from each other until each irregular support plate 11 is in close contact with the second surface 324 of the H-shaped steel column 3.

[0030] The irregular support plate module 1 comprises two sets, which enter the interior of the H-shaped steel column 3 through openings on both sides, respectively, and adhere to the fourth surface 311 and the second surface 324 of the H-shaped steel column 3. Each set of irregular support plate module 1 includes two irregular support plates 11, a strut 12, and a push nut 13. The two irregular support plates 11 are connected together by the strut 12 and the push nut 13, adhering to the fourth surface 311 and the second surface 324 of the H-shaped steel column 3. The strut 12 is located between the two irregular support plates 11, with one end passing through one of the irregular support plates 11.

[0031] By rotating the push nut 13, the position of the push nut 13 on the strut 12 can be adjusted, thereby applying a pushing force to the two irregular support plates 11, causing the two irregular support plates 11 to move toward the upper flange 321 or the lower flange 322 respectively, so as to fit tightly against the second surface 324 of the H-shaped steel column 3, thereby achieving lateral restraint on the flange 32 and reducing the risk of local instability of the flange 32.

[0032] Step S1 can solve the problem of insufficient internal constraint of H-shaped steel columns and easy local stress concentration caused by traditional strengthening methods. By forming a fitting constraint on the second surface 324 of the flange 32 of the H-shaped steel column 3 through the irregular support plate module 1, the bearing capacity of the steel column and the overall structural stiffness can be improved.

[0033] S2 specifically includes: S21: Connect the four adjustable preload supports 22 to the beams at the bottom of the H-shaped steel columns to be reinforced in the original building structure using chemical or mechanical anchors, so that the adjustable preload supports 22 are firmly installed and meet the load-bearing requirements.

[0034] S22: The rod end 2111 of the cross-hinged unit at the bottom of the cross-hinged rod assembly 21 is set on the adjustable pre-tension support 22. Specifically, the rod end 2111 of the bottom cross-hinged unit passes through the hinge rod pre-drilled hole 117 of the irregular support plate 11, and then extends between the two vertical plates 222 of the adjustable pre-tension support 22. The locking bolt 224 passes through the guide groove 223 and locks with the through hole of the rod end 2111, thus completing the connection between the bottom cross-hinged unit and the adjustable pre-tension support 22.

[0035] S23: The cross-hinged units are assembled upwards sequentially by the flange clamping and fastening mechanism 23, so that the adjacent cross-hinged units can be hinged flexibly and reliably.

[0036] The structure of the auxiliary reinforcement module 2 is as follows: Figure 4 , Figure 5 As shown, it includes a cross-hinged rod assembly series mechanism 21, an adjustable preload support 22, and a flange clamping fastening mechanism 23.

[0037] The cross-hinged linkage mechanism 21 comprises multiple cross-hinged units connected in series. The rod ends 2111 of adjacent cross-hinged units are rotatably connected by a flange clamping fastening mechanism 23. The cross-hinged linkage mechanism 21 is telescopic, allowing the distance between the rod ends 2111 on both sides to be reduced or increased.

[0038] The adjustable preload support 22 includes a base plate 221, a vertical plate 222, a locking bolt 224, and a vertical plate stiffening rib 225. The vertical plate 222 is fixedly mounted on the base plate 221, and a horizontally extending guide groove 223 is provided on the vertical plate 222. The vertical plate stiffening rib 225 is connected to the vertical plate 222 on one side and to the base plate 221 on the other side, which is used to enhance the lateral bending resistance of the vertical plate 222.

[0039] During installation, the adjustable preload support 22 is fixedly connected to the beams and slabs of the original building structure via the base plate 221 and is fixedly installed at the four corners of the H-shaped steel column 3. The flange clamping fastening mechanism 23 includes a rectangular head cylindrical bolt 231, a locking nut 232, and a wedge-shaped pad 233. The rectangular head cylindrical bolt 231 is used to insert into the through holes of the two stacked rod ends 2111. Under the action of the locking nut 232 and the wedge-shaped pad 233, the cross-hinged rod assembly series mechanism 21 can be pressed against the first surface 323 of the upper flange 321 and the lower flange 322 of the H-shaped steel column 3.

[0040] Step S23 specifically involves: a rectangular head cylindrical bolt 231 being inserted from the free end of the hinge rod assembly mounting plate 114 into the through hole of the rod ends 2111 of the two overlapping hinge rods 211 and exiting through the through hole; a wedge-shaped washer 233 being inserted from the bolt end of the rectangular head cylindrical bolt 231; and a locking nut 232 being fitted onto the bolt end of the rectangular head cylindrical bolt 231 after the wedge-shaped washer 233. The wedge-shaped washer 233 is rotated so that its lateral protrusion 2331 faces the flange bonding plate 113. The locking nut 232 is tightened so that the first mating surface 2332 abuts against the surface of the flange bonding plate 113, and the second mating surface 2333 abuts against the surface of the hinge rod assembly mounting plate 114, completing the initial assembly. Through the above steps, the reinforcing device is tightly fitted to the H-beam steel column 3, the reinforcing force is evenly transmitted, and the load-bearing capacity, stiffness, and stability of the H-beam steel column 3 are significantly improved.

[0041] In a preferred embodiment, step S2 further includes S24: referring to S21-S22, the four adjustable preload supports 22 are connected to the beam plate located at the top of the H-shaped steel column to be reinforced by chemical anchors or mechanical anchors, and the rod end 2111 of the cross-hinged unit at the top of the cross-hinged rod group series mechanism 21 is set on the adjustable preload support 22 at the top of the H-shaped steel column.

[0042] Step S2 solves the problems of insufficient fit and pre-tightening force between the existing reinforcement method and the H-shaped steel column 3. By installing the auxiliary reinforcement module 2, the connection reliability between the reinforcement device and the H-shaped steel column 3 is further improved, and multi-directional coordinated constraint of the H-shaped steel column 3 is achieved.

[0043] Step S3 includes S31: using a hydraulic device to push the locking bolt 224 of the adjustable pre-tightening support 22 towards the H-shaped steel column 3, so that it is fixed when it reaches the preset position of the guide groove 223, driving the cross hinge unit of the auxiliary reinforcing module 2 to deform, and driving the irregular support plate module 1 to clamp the H-shaped steel column 3 inward.

[0044] S32: Continue to tighten the locking nut 232 of the flange clamping fastening mechanism 23. At this time, the head of the rectangular head cylindrical bolt 231 presses against the rod end 2111 of the hinge rod 2111 of the auxiliary reinforcing module 2, pushing the auxiliary reinforcing module 2 toward the first surface 323 of the H-shaped steel column 3, so that the auxiliary reinforcing module 2 is tightly attached to the first surface 323, further improving the strength of the H-shaped steel column 3.

[0045] Step S3 further solves the problem of the existing reinforcement method not fitting tightly to the H-shaped steel column, so that the cross-hinged rod group series mechanism 21 of the auxiliary reinforcement module 2 is in close contact with the first surface 323 of the H-shaped steel column 3, thereby improving the reinforcement effect.

[0046] Compared with existing technologies, the method for strengthening H-shaped steel columns provided in this embodiment solves the problems of complex construction, long cycle, and high requirements for the construction environment of traditional strengthening methods. The method has a clear process, convenient assembly of each module, no need for open flame operation, and is suitable for various industrial plant construction scenarios. Through step-by-step assembly and debugging, the strengthening device is tightly fitted to the H-shaped steel column 3, the strengthening force is evenly transmitted, and the load-bearing capacity, stiffness and stability of the H-shaped steel column 3 are significantly improved. No additional maintenance is required after construction, which effectively shortens the plant renovation cycle and reduces construction costs.

[0047] Example 2 A specific embodiment of the present invention, such as Figures 2-3 As shown, a strengthening device for H-shaped steel columns is disclosed, which is used to strengthen H-shaped steel columns according to the strengthening method in Example 1.

[0048] The strengthening device for the H-shaped steel column in this embodiment includes two irregular support plate modules 1 and two auxiliary strengthening modules 2. The two irregular support plate modules 1 enter the interior of the H-shaped steel column 3 from the openings on both sides of the H-shaped steel column 3 and are attached to the fourth surface 311 of the web 31 of the H-shaped steel column 3 and the second surface 324 of the upper flange 321 and the lower flange 322, thereby increasing the cross-sectional area of ​​the H-shaped steel column 3 and effectively improving the lateral displacement resistance and overall load-bearing capacity of the H-shaped steel column 3.

[0049] There are two auxiliary reinforcing modules 2, which are respectively set on the first surface 323 of the upper flange 321 and the lower flange 322 of the H-shaped steel column 3. The two ends of each auxiliary reinforcing module 2 are respectively connected to a special-shaped support plate 11 of a special-shaped support plate module 1, which can pull the special-shaped support plate 11 inward, so that the flange bonding plate 113 of the special-shaped support plate 11 presses against the fourth surface 311 of the web plate 31 of the H-shaped steel column 3.

[0050] Specifically, see Figure 3 , Figure 4The irregular support plate module 1 includes two irregular support plates 11, a strut 12, and a push nut 13. The two irregular support plates 11 are connected together by the strut 12 and the push nut 13, and are close to the fourth surface 311 of the web 31 on the same side, as well as the second surface 324 of the upper flange 321 and the lower flange 322. The strut 12 is located between the two irregular support plates 11, and one end passes through one of the irregular support plates 11. Both ends of the strut 12 are threaded sections, which extend from the ends of the strut 12 towards the middle, and the length of the threaded section is not less than one-third of the length of the strut 12. Two push nuts 13 are fitted on each strut 12, and the two push nuts 13 are also located between the two irregular support plates 11, with each push nut 13 close to one of the two irregular support plates 11. By rotating the push nut 13, the position of the push nut 13 on the strut 12 can be adjusted, thereby applying a thrust to the two irregular support plates 11, causing the two irregular support plates 11 to move toward the upper flange 321 or the lower flange 322 respectively, so as to fit tightly against the second surface 324 of the upper flange 321 or the lower flange 322, thereby achieving lateral constraint on the flange 32 and reducing the risk of local instability of the flange 32.

[0051] The irregular support plate 11 is an irregular steel column, the cross-section of which is formed in the shape of a scale hook, such as... Figure 4 As shown. The irregular support plate 11 includes a strut mounting plate 111, a web bonding plate 112, a flange bonding plate 113, and a hinge rod assembly mounting plate 114 connected in sequence; wherein the strut mounting plate 111 and the flange bonding plate 113 are parallel and located on the same side of the web bonding plate 112, and the web bonding plate 112 and the hinge rod assembly mounting plate 114 are parallel and located on opposite sides of the flange bonding plate 113. The length of the flange bonding plate 113 is not less than half the length of the flange 32 of the H-shaped steel column 3, and the length of the hinge rod assembly mounting plate 114 exceeds the thickness of the flange 32 of the H-shaped steel column 3. This arrangement can solve the problem of conventional reinforcing devices not fitting tightly with the H-shaped steel column and being prone to loosening, and achieve constraint and reinforcement of multiple surfaces of the H-shaped steel column.

[0052] The connection between the strut mounting plate 111, the web plate bonding plate 112, the flange bonding plate 113, and the hinge rod assembly mounting plate 114 can be made by rolling or by on-site welding to suit different construction scenarios.

[0053] like Figure 5 As shown, the strut mounting plate 111 is provided with strut holes 118 for mounting struts 12. The strut holes 118 are preferably L-shaped grooves, extending horizontally inward from the side edge of the strut mounting plate 111 for a certain distance, and then extending vertically downward, which facilitates the installation and fixing of the struts 12 and can accommodate minor positional deviations during the installation process.

[0054] In a preferred embodiment, the irregular support plate 11 further includes a main reinforcing rib 115. The main reinforcing rib 115 is a trapezoidal plate, with its upper bottom edge fixedly connected to the strut mounting plate 111, its lower bottom edge fixedly connected to the flange bonding plate 113 of the irregular support plate 11, and one side perpendicular to both the upper and lower bottom edges and fixedly connected to the web bonding plate 112. This solves the problem of relative deformation between the strut mounting plate 111 and the flange bonding plate 113 when the irregular support plate 11 is under stress, enhancing the overall rigidity and load-bearing capacity of the irregular support plate 11. The main reinforcing ribs 115 are arranged in groups, each group having two trapezoidal plates, one above a strut 12 and the other below. A set of main reinforcing ribs 115 is provided for each strut 12. To address the stress concentration near the stress application point of the strut 12, the symmetrically arranged reinforcing ribs disperse the stress, reducing local buckling of the irregular support plate 11 under the thrust of the strut 12.

[0055] Further preferred, such as Figure 4 As shown, the irregular support plate 11 also includes an auxiliary reinforcing rib 116. The auxiliary reinforcing rib 116 is located on the inner side of the corner where the flange bonding plate 113 and the hinge rod assembly mounting plate 114 connect. It is a right-angled triangular plate, with its two right-angled sides fixedly connected to the flange bonding plate 113 and the hinge rod assembly mounting plate 114, respectively. The auxiliary reinforcing rib 116 strengthens the connection strength at the corner of the irregular support plate 11, solving the problem of cracking or deformation that easily occurs at the corner due to complex stress.

[0056] Specifically, in the height direction, auxiliary reinforcing ribs 116 and main reinforcing ribs 115 are arranged in a one-to-one correspondence. Along the length of the cross-section of the flange bonding plate 113, the ends of the auxiliary reinforcing ribs 116 and main reinforcing ribs 115 overlap. This arrangement creates a continuous force transmission path, allowing stress to be smoothly transferred from the hinge rod assembly mounting plate 114 to the flange bonding plate 113 and auxiliary reinforcing ribs 116, and then diffused to the main reinforcing ribs 115. This significantly improves the reliability of the corner strength of the irregular support plate 11, while also enhancing the overall torsional resistance of the irregular support plate 11.

[0057] During assembly, the strut mounting plates 111 of the two irregular support plates 11 are set facing each other, and then pushed inward toward one side opening of the H-shaped steel column 3 until the web plate fitting plate 112 is close to the fourth surface 311 of the web plate 31. Then, they are connected by the strut 12 and the push nut 13 to form a whole. By rotating the push nut 13, the two irregular support plates 11 are pushed to move toward the second surface 324 of the upper flange 321 and the lower flange 322 respectively and fit tightly, thereby strengthening the H-shaped steel column 3.

[0058] Furthermore, multiple struts 12 are evenly distributed between the two irregular support plates 11 along the length of the irregular support plate 11, so that the irregular support plate 11 is subjected to uniform force, reduces local stress concentration, and enhances stability.

[0059] The structure of auxiliary reinforcement module 2 is as follows Figures 6-10 As shown, it includes a cross-hinged rod assembly series mechanism 21, an adjustable preload support 22, and a flange clamping fastening mechanism 23.

[0060] The cross-hinged rod assembly 21 is positioned close to the first surface 323 of the flange 32 of the H-shaped steel column 3, with its two ends connected to a shaped support plate 11. An adjustable preload support 22 is located at the bottom and / or top of the cross-hinged rod assembly 21, used to drive the cross-hinged rod assembly 21 to pull the shaped support plate 11 inward. A flange clamping fastening mechanism 23 is located at the end of the cross-hinged rod assembly 21 connected to the shaped support plate 11, used to deformably connect the cross-hinged units in the cross-hinged rod assembly 21 into a single unit, thereby achieving the inward pull of the shaped support plate 11. Simultaneously, the flange clamping fastening mechanism 23 also ensures that the cross-hinged rod assembly 21 is tightly attached to the first surface 323 of the flange 32 of the H-shaped steel column 3, further improving the strength of the H-shaped steel column 3.

[0061] The cross-hinged linkage mechanism 21 includes multiple cross-hinged units, each of which includes two hinged rods 211 and a central hinged shaft 212, such as... Figure 6 As shown, both the end 2111 and the middle 2112 of the hinge rod 211 are provided with through holes. The middle 2112 of two hinge rods 211 are hinged together by a central hinge shaft 212, forming an X shape, and the two hinge rods 211 can rotate around the central hinge shaft 212. The end 2111 of two adjacent cross-hinged units are respectively hinged together by a flange clamping fastening mechanism 23. Multiple cross-hinged units are connected sequentially to form a row, constituting an auxiliary reinforcing module 2.

[0062] To ensure better contact between the auxiliary reinforcing module 2 and the first surface 323 of the H-shaped steel column 3, both ends 2111 of the hinge rod 211 are thinned on one side, while the middle section 2112 of the hinge rod 211 is thinned on both sides. Specifically, the thickness of the end 2111 is reduced by half from one side, and the thickness of the middle section 2112 is reduced by one-third from each side. The axial length of the middle hinge shaft 212 does not exceed the thickness of the hinge rod 211. This arrangement ensures that the overall thickness remains consistent when the two hinge rods 211 are hinged together, and that neither end of the middle hinge shaft 212 protrudes beyond the surface of the hinge rod 211. This facilitates close contact between the cross-hinged rod assembly 21 of the auxiliary reinforcing module 2 and the first surface 323 of the H-shaped steel column 3, further resolving the problem of insufficient contact between conventional reinforcing devices and H-shaped steel columns in the prior art.

[0063] Preferably, the lower end of the rod end 2111 of the bottommost cross-hinged unit of the auxiliary reinforcing module 2 is not thinned, that is, no groove is cut on one side of the lower end of the rod end 2111 of the hinge rod 211. Correspondingly, the hinge rod assembly mounting plate 114 of the irregular support plate 11 is provided with a hinge rod reserved hole 117.

[0064] like Figure 3 , Figure 5 , Figure 9 as well as Figure 10 As shown, the hinge rod pre-drilled hole 117 is an elongated through hole extending along the length of the hinge rod assembly mounting plate 114. The rod ends 2111 on the same side of two adjacent cross-hinged units overlap each other and pass through the hinge rod pre-drilled hole 117 of the irregular support plate 11, so that the through holes provided on the rod ends 2111 are located on the other side of the hinge rod assembly mounting plate 114. The rectangular head cylindrical bolts of the flange clamping fastening mechanism 23 pass through the through holes of the two rod ends 2111 in sequence and are locked by lock nuts and wedge-shaped washers.

[0065] Preferably, the diameter of the through hole at the end of the rod 2111 is larger than the diameter of the rectangular head cylindrical bolt 231. This setting can reduce the machining accuracy and assembly difficulty, shorten the working time, improve efficiency, and reduce costs.

[0066] Furthermore, multiple pre-drilled holes 117 are provided on the hinge rods, the number of which corresponds to the number of cross-hinged units, and they are evenly distributed along the length of the hinge rod assembly mounting plate 114, improving the uniformity and stability of the connection between the auxiliary reinforcing module 2 and the irregular support plate 11. The rod ends 2111 on the other side of the two cross-hinged units are connected to the irregular support plate 11 in another irregular support plate module 1 in the same way. Through this arrangement, the two sides of the auxiliary reinforcing module 2 are respectively connected to one irregular support plate 11 in one irregular support plate module 1, and the two auxiliary reinforcing modules 2 connect the two irregular support plate modules 1 into a whole, and enclose the H-shaped steel column 3 inside, forming a cooperative force-bearing system.

[0067] The structure of the adjustable preload support 22 is as follows: Figure 7 , Figure 8 As shown, the system includes a base plate 221, vertical plates 222, locking bolts 224, and vertical plate stiffening ribs 225. The base plate 221 is horizontally positioned, and there are two vertical plates 222, parallel to each other and spaced apart at the center of the base plate 221, extending vertically. Each vertical plate 222 has two vertical plate stiffening ribs 225. One side of each stiffening rib 225 is fixedly connected to the vertical plate 222, and the other side is fixedly connected to the base plate 221. The stiffening ribs 225 are perpendicular to both the base plate 221 and the vertical plates 222. The two stiffening ribs 225 are located near one end of each vertical plate 222, enhancing the vertical plate 222's resistance to lateral bending.

[0068] Preferably, the base plate 221, the vertical plate 222, and the vertical plate stiffening rib 225 are connected by welding to improve the overall strength of the adjustable preload support 22. The vertical plate 222 is provided with a guide groove 223, which is a horizontally extending rectangular groove for the locking bolt 224 to pass through, so as to realize the horizontal position adjustment of the locking bolt 224, thereby driving the cross-hinged rod group series mechanism 21 of the auxiliary reinforcing module 2.

[0069] The adjustable preload support 22 is located at the bottom of the auxiliary reinforcement module 2, such as... Figure 4 As shown. Specifically, the lower end of the rod 2111 of the bottommost cross-hinged unit of the auxiliary reinforcing module 2 passes through the hinge rod pre-drilled hole 117 of the irregular support plate 11 and extends between the two vertical plates 222 of the adjustable preload support 22, so that the through hole of the rod end 2111 is flush with the guide groove 223. The locking bolt 224 enters from the guide groove 223 on one vertical plate 222, passes through the through hole of the rod end 2111, and exits from the guide groove 223 on the other vertical plate 222, and is then locked with a nut. In this configuration, the adjustable preload support 22 is connected to the bottom of the auxiliary reinforcing module 2.

[0070] This embodiment 2 includes four adjustable preload supports 22, which are respectively connected to the bottom ends of two cross-hinged rod series mechanisms 21.

[0071] Preferably, the length of the portion below the middle hinge shaft 212 of the bottommost cross-hinged unit of the cross-hinged rod assembly 21 is greater than the length of the portion above the middle hinge shaft 212. Utilizing the lever principle, when the adjustable preload support 22 is driven, the longer lever arm at the lower end, with the middle hinge shaft 212 as the fulcrum, reduces the force required for driving, lowering the construction difficulty, while simultaneously allowing the upper rod end 2111 to generate sufficient tension, improving the preload effect.

[0072] During assembly, the adjustable preload support 22 can be fixed to the beam plate of the building structure (located at the bottom of the H-shaped steel column) using chemical anchors or mechanical anchors, thereby improving the installation stability of the adjustable preload support 22. One side of the bottom of the cross-hinged rod assembly series mechanism 21 is first fixed to the adjustable pre-tightening support 22 on the same side of the flange 32 of the H-shaped steel column 3. For the adjustable pre-tightening support 22 at the bottom of the cross-hinged rod assembly series mechanism 21 on the other side, the locking bolt 224 is pushed towards the H-shaped steel column 3 by a hydraulic device until it reaches a certain position in the guide groove 223 and is fixed. At this time, all the cross-hinged units of the auxiliary reinforcing module 2 will deform synchronously, and the rod ends 2111 will retract synchronously, driving the rectangular head cylindrical bolts 231 to press against the hinged rod assembly mounting plate 114, thereby pressing the web plate 112 against the fourth surface 311. This can provide a large pre-tightening force to the irregular support plate modules 1 on both sides of the auxiliary reinforcing module 2, so that the irregular support plate modules 1 and the H-shaped steel column 3 are tightly fitted together, reducing loosening.

[0073] Furthermore, to address the issue of disordered force transmission path in the auxiliary reinforcing module 2, leading to uneven stress on the flange 32, a certain distance is maintained between the hinge rod assembly mounting plate 114 of the irregular support plate 11 and the third surface 325 of the flange 32 of the H-shaped steel column 3. This distance ranges from 5 to 10 mm. By setting this distance, the inward tension of the auxiliary reinforcing module 2 on the hinge rod assembly mounting plate 114 is transmitted only to the web bonding plate 112, causing the web bonding plate 112 to press against the fourth surface 311 of the H-shaped steel column 3. This reduces the amount of tension transmitted to the third surface 325 of the flange 32, thereby weakening the compressive stress. This allows all the tension to be used to enhance the constraint effect of the web 31, improving the shear bearing capacity of the web 31.

[0074] If the height of the H-shaped steel column 3 is greater than 5 meters, it is preferable to also install an adjustable preload support 22 at the top of the auxiliary reinforcing module 2. The adjustable preload support 22 at the top is installed in the same way as the adjustable preload support 22 at the bottom. Through bidirectional constraint from top to bottom, the longitudinal deformation of the tall steel column during the reinforcement process is reduced, thereby improving the overall stability of the reinforcement.

[0075] The structure of the flange clamping fastening mechanism 23 is as follows Figure 9 , 10 As shown, it includes a rectangular head cylindrical bolt 231, a lock nut 232, and a wedge-shaped washer 233. The structure of the wedge-shaped washer 233 is as follows: Figure 10 As shown, the wedge-shaped pad 233 has a through hole in the middle and a side protrusion 2331 on one side. One side of the side protrusion 2331 forms a first mating surface 2332, and adjacent to it is a second mating surface 2333. The first mating surface 2332 and the second mating surface 2333 form a right angle. The first mating surface 2332 is used to abut against the surface of the flange bonding plate 113, and the second mating surface 2333 is used to abut against the surface of the hinge rod assembly mounting plate 114.

[0076] During assembly, the rectangular head cylindrical bolt 231 is inserted from the free end of the hinge rod assembly mounting plate 114 into the through hole of the rod end 2111 of the two overlapping hinge rods 211 and exits through the through hole. The wedge-shaped pad 233 is inserted from the bolt end of the rectangular head cylindrical bolt 231, and the locking nut 232 is fitted onto the bolt end of the rectangular head cylindrical bolt 231 after the wedge-shaped pad 233. The wedge-shaped pad 233 is rotated so that its side protrusion 2331 faces the flange bonding plate 113. The locking nut 232 is tightened so that the first mating surface 2332 abuts against the surface of the flange bonding plate 113, and the second mating surface 2333 abuts against the surface of the hinge rod assembly mounting plate 114, completing the initial assembly.

[0077] After adjusting the position of the locking bolt 224 of the adjustable preload support 22, continue to tighten the locking nut 232. At this time, the head of the rectangular head cylindrical bolt 231 presses against the end 2111 of the hinge rod 211 of the auxiliary reinforcing module 2, pushing the auxiliary reinforcing module 2 toward the first surface 323 of the flange 32 of the H-shaped steel column 3, so that the auxiliary reinforcing module 2 is tightly attached to the first surface 323 of the flange 32, further improving the strength of the H-shaped steel column 3.

[0078] Compared with the prior art, the H-shaped steel column strengthening device provided in this embodiment 2 solves the problem of insufficient pre-tightening force of the irregular support plate module 1, and further improves the connection reliability between the strengthening device and the H-shaped steel column 3; it solves the problem that the auxiliary strengthening module 2 and the first surface 323 of the flange 32 are not tightly attached and cannot form an effective external constraint on the flange 32; through the bidirectional snap-fit ​​and fastening action of the flange pressing fastening mechanism 23, the auxiliary strengthening module 2 and the first surface 323 of the flange 32 are tightly attached to form an internal and external bidirectional constraint system, which further improves the local stability performance of the flange 32; the thinning design of the hinge rod 211 improves the fitting effect, reduces the influence of structural interference on the transmission of strengthening force, and makes the overall structure more cooperative in bearing force and the strengthening effect more significant.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for strengthening an H-shaped steel column, characterized in that, The strengthening method includes the following steps: S1: Install the irregular support plate module (1) to reinforce the second surface (324) of the H-shaped steel column (3); S2: Install auxiliary reinforcement module (2) to reinforce the fourth surface (311) of the H-shaped steel column (3); S3: Adjust to the clamping state to strengthen the first surface (323) of the H-shaped steel column (3).

2. The method for strengthening H-shaped steel columns according to claim 1, characterized in that, In step S1, the irregular support plate module (1) is provided in two sets, which enter the interior of the H-shaped steel column (3) from the openings on both sides of the H-shaped steel column (3).

3. The method for strengthening H-shaped steel columns according to claim 2, characterized in that, The steps S1 specifically include: S11: Each set of irregular support plate modules (1) includes two irregular support plates (11); the two irregular support plates (11) are symmetrically placed on the same side of the web plate (31) of the H-shaped steel column (3); S12: install the strut (12) and push nut (13); S13: apply preload to the two irregular support plates (11).

4. The method for strengthening H-shaped steel columns according to claim 3, characterized in that, Step S11 is as follows: the strut mounting plates (111) of the two irregular support plates (11) are set facing each other, and the web plate bonding plate (112) of the two irregular support plates (11) is close to the fourth surface (311) of the H-shaped steel column (3).

5. The method for strengthening H-shaped steel columns according to claim 4, characterized in that, Step S12 is as follows: First, put the two push nuts (13) onto the support rod (12) and position them near the middle of the support rod (12). Then, install the two ends of the support rod (12) into the support rod holes (118) on the two irregular support plates (11). The installed push nuts (13) are located between the two irregular support plates (11).

6. The method for strengthening H-shaped steel columns according to claim 5, characterized in that, Step S13 specifically involves: tightening each push nut (13) to push the two irregular support plates (11) away from each other until each irregular support plate (11) is in close contact with the second surface (324) of the H-shaped steel column (3).

7. The method for strengthening an H-shaped steel column according to any one of claims 1-6, characterized in that, S2 specifically includes: S21: connecting the four adjustable preload supports (22) to the beams and slabs of the original building structure through chemical anchors or mechanical anchors; S22: setting the rod end (2111) of the cross hinge unit at the bottom of the cross hinge rod group series mechanism (21) on the adjustable preload support (22).

8. The method for strengthening H-shaped steel columns according to claim 7, characterized in that, The beams and slabs of the original building structure in step S21 are located at the bottom and / or top of the H-shaped steel column (3).

9. The method for strengthening H-shaped steel columns according to claim 8, characterized in that, Step S22 is as follows: the end of the rod (2111) of the bottom cross hinge unit passes through the hinge rod reserved hole (117) of the irregular support plate (11), extends into the two vertical plates (222) of the adjustable pre-tightening support (22), and is locked by passing the guide groove (33) through the through hole of the rod end (2111) with the locking bolt (34).

10. The method for strengthening H-shaped steel columns according to any one of claims 1-6, characterized in that, The H-shaped steel columns are reinforced using a strengthening device.

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