Transformation structure of I-shaped steel cross joint

Abstract

The invention provides an I-shaped steel cross joint transformation structure which comprises an original steel beam, a first steel beam and a second steel beam. The newly-added steel beam is horizontally arranged in the second direction, and the newly-added steel beam can penetrate through the interior of the notch to be installed at the designed position; the reinforcing assembly is connected to the notch of the original steel beam in the first direction so as to increase the sectional area of the notch of the original steel beam. According to the technical scheme, the notches allowing the newly-added steel beams to penetrate through are formed in the original steel beams, the space occupied by the cross joint is remarkably reduced, the newly-added steel beams can be installed at the designed positions under the condition that the space is limited, the bearing capacity of the original steel beams at the notches is reinforced through the reinforcing assemblies, the bearing capacity of the joint is guaranteed, and the construction cost is reduced. And the situation that bearing force is provided for the structure only through welding seams at the joint position is avoided, and the stability of the joint is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure reinforcement and reconstruction, and in particular to an I-beam cross node reconstruction structure. Background Art

[0002] With the acceleration of urbanization and the continuous advancement of construction technology, the field of building structures is undergoing a transition from an incremental era to a stock era. During this transition, new steel structure projects are gradually decreasing, while the demand for the transformation and reinforcement of existing steel structures is increasing.

[0003] In the process of steel structure reconstruction, it is common to encounter cross-interference between the newly added steel beams and the original steel beams. Especially in the environment with dense pipelines such as industrial plants, the installation space of the newly added steel beams is greatly limited by the surrounding pipelines and clearance requirements, making it difficult to install the new steel beams.

[0004] The existing patent document CN 117738488 A provides a secondary welding reinforcement node structure of an H-shaped steel column and a steel beam, which can be used in an environment with limited space. However, the reinforced node structure adopts a method of welding the newly added steel beams on both sides of the original steel column, so that the newly added steel beams rely entirely on the welds to provide their bearing capacity at the nodes, which easily causes unstable bearing capacity at the nodes and affects the safety of the structure. Summary of the invention

[0005] A technical problem to be solved by the present disclosure is: how to add a new steel beam more stably under the condition of limited installation space.

[0006] In order to solve the above technical problems, the embodiment of the present disclosure provides an I-beam intersection node transformation structure, including: an original steel beam, which is horizontally arranged along a first direction and has a notch; a newly added steel beam, which is horizontally arranged along a second direction and can pass through the notch to be installed at a designed position; a reinforcement component, which is connected to the notch 104 of the original steel beam 1 along the first direction to increase the cross-sectional area of ​​the original steel beam 1 at the notch 104 position.

[0007] In some embodiments, the original steel beam and the newly added steel beam are welded and connected at the notch.

[0008] In some embodiments, the original steel beam includes a first upper flange plate, a first web plate and a first lower flange plate, and the newly added steel beam includes a second upper flange plate, a second web plate and a second lower flange plate; wherein the notch is configured to disconnect the upper portions of the first upper flange plate and the first web plate, and the reinforcement assembly includes a plurality of reinforcement ribs passing through the second web plate and connected to the first upper flange plate, and a first reinforcement plate horizontally arranged at the lower portion of the first web plate and located below the notch.

[0009] In some embodiments, the second web is provided with a plurality of openings horizontally distributed along the second direction, and each reinforcing rib passes through an opening to connect to the first upper flange plates located on both sides of the newly added steel beam.

[0010] In some embodiments, the reinforcing ribs and the newly added steel beams are welded and connected at the openings.

[0011] In some embodiments, the first reinforcing plate is symmetrically arranged along the plane where the first web plate is located.

[0012] In some embodiments, a stiffening plate is vertically connected to the first web, one end of the stiffening plate is connected to the first upper flange plate, and the other end is connected to the first reinforcement plate.

[0013] In some embodiments, a plurality of stiffening plates are disposed on the first web, and the plurality of stiffening plates are distributed on both sides of the slot along the first direction.

[0014] In some embodiments, the reinforcement assembly further includes a second reinforcement plate connected to the lower surface of the first lower flange plate along the first direction.

[0015] In some embodiments, the second reinforcing plate includes a vertical portion connected to the first lower flange plate and a horizontal portion connected below the vertical portion, and the second reinforcing plate is symmetrical along the plane where the first web plate is located.

[0016] Through the above technical scheme, the I-beam intersection node reconstruction structure provided by the present invention is provided with a slot on the original steel beam for the new steel beam to pass through, which significantly reduces the space occupied by the intersection node, so that the new steel beam can be installed at the designed position under space-constrained conditions, and the bearing capacity of the original steel beam at the slot is reinforced by the reinforcement component, which ensures the bearing capacity of the node and avoids relying solely on the weld at the node position to provide the bearing capacity for the structure, thereby improving the stability of the node. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a front view schematic diagram of the modified structure disclosed in the embodiment of the present disclosure;

[0019] Figure 2 is a right side schematic diagram of the modified structure disclosed in the embodiment of the present disclosure;

[0020] Figure 3 It is a partial structural schematic diagram of a newly added steel beam disclosed in an embodiment of the present disclosure;

[0021] Figure 4 This is a schematic diagram of the local structure of the original steel beam disclosed in the embodiment of the present disclosure. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the local structure of the original steel beam disclosed in the embodiment of the present disclosure. Figure 2 ;

[0023] Figure 6 is a schematic top view of a first reinforcement plate disclosed in an embodiment of the present disclosure;

[0024] Figure 7 is a cross-sectional schematic diagram of an original steel beam and a reinforcement component at a notch disclosed in an embodiment of the present disclosure;

[0025] Figure 8 It is a schematic cross-sectional view of the original steel beam disclosed in the embodiment of the present disclosure.

[0026] Description of reference numerals:

[0027] 1. Original steel beam; 101. First upper flange plate; 102. First web plate; 103. First lower flange plate; 104. Notch; 2. Newly added steel beam; 201. Second upper flange plate; 202. Second web plate; 203. Second lower flange plate; 204. Opening; 3. Reinforcement assembly; 301. Reinforcement ribs; 302. First reinforcement plate; 303. Second reinforcement plate; 304. Stiffening plate; 305. Vertical portion; 306. Horizontal portion. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0029] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0030] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0032] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0033] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] like Figure 1-Figure 2As shown, the present disclosure provides an I-beam intersection node reconstruction structure, including: an original steel beam 1, which is horizontally arranged along a first direction and has a notch 104; a newly added steel beam 2, which is horizontally arranged along a second direction and can pass through the notch 104 to be installed at a designed position; a reinforcement component 3, which is connected to the notch 104 of the original steel beam 1 along the first direction to increase the cross-sectional area of ​​the original steel beam 1 at the notch 104 position.

[0036] Specifically, Figure 1 As shown, when the newly added steel beam 2 is installed above the original steel beam 1 and there is local interference between the two, the newly added steel beam 2 cannot adjust its position upward due to the limitation of the installation space. By opening a notch 104 on the original steel beam 1, the newly added steel beam 2 can be installed through the notch 104, avoiding the mutual influence between the original steel beam 1 and the newly added steel beam 2, effectively reducing the installation height of the cross node, so that the newly added steel beam 2 can be installed at the designed position under the condition of limited space. In addition, the notch 104 does not completely cut off the original steel beam 1, and the part of the steel retained at the notch 104 of the original steel beam 1 forms a weak section. Therefore, based on the actual construction conditions on site, the setting of the reinforcement component 3 can be a method of using steel to directly weld to the part of the steel forming the weak section along the first direction to directly increase the cross-sectional area here, or a method of welding the steel across the notch 104 to the complete steel located on both sides of the notch 104 to indirectly increase the cross-sectional area here, or a combination of the two methods can be used to reinforce the original steel beam 1. The reinforcement component 3 and the weak section of the original steel beam 1 together form a new section at the notch 104, which effectively increases the cross-sectional area of ​​the original steel beam 1 at the notch 104, thereby achieving the purpose of improving the bearing capacity. In other embodiments, when the construction space is limited, the reinforcement component 3 can also be connected to the original steel beam 1 in a direction similar to the first direction to facilitate the welding operation of the operators. Compared with the method in which the node load is entirely borne by the weld, the original steel beam 1 of the present disclosure adopts the new section formed by the weak section after removing the notch 104 at the intersection node to jointly bear the node load, thereby reducing the uncertainty caused by the full welding construction and improving the stability of the node.

[0037] In some embodiments, the original steel beam 1 and the newly added steel beam 2 are welded and connected at the notch 104 .

[0038] Specifically, Figure 5 As shown, the notch 104 on the original steel beam 1 is opened into a shape that matches the cross-section of the newly added steel beam 2. After the newly added steel beam 2 passes through the notch 104 and is placed in the designed position, the original steel beam 1 and the newly added steel beam 2 are welded and connected at the notch 104, which can effectively improve the integrity of the intersection node and facilitate force bearing.

[0039] In some embodiments, the original steel beam 1 and the newly added steel beam 2 can also be bonded by epoxy resin building structural adhesive, which can also improve the integrity of the intersection node.

[0040] like Figures 1 to 6 As shown, in some embodiments, the original steel beam 1 includes a first upper flange plate 101, a first web plate 102 and a first lower flange plate 103, and the newly added steel beam 2 includes a second upper flange plate 201, a second web plate 202 and a second lower flange plate 203; wherein the notch 104 is configured to disconnect the upper portion of the first upper flange plate 101 and the first web plate 102, and the reinforcement component 3 includes a plurality of reinforcement ribs 301 passing through the second web plate 202 and connected to the first upper flange plate 101, and a first reinforcement plate 302 horizontally arranged at the lower portion of the first web plate 102 and located below the notch 104.

[0041] Specifically, the second upper flange plate 201 is higher than the first upper flange plate 101, the reinforcing rib 301 passes through the second web plate 202 along the first direction, and its two ends are respectively welded to the first upper flange plate 101 located on both sides of the notch 104, and the first reinforcing plate 302 is welded to the lower part of the first web plate 102 along the first direction. At the weak section of the original steel beam 1, the reinforcing rib 301 is arranged above the notch 104, and the first reinforcing plate 302 is arranged below. The weak section of the original steel beam 1 after the notch 104 is opened and the two form a new section to bear the node load.

[0042] In some embodiments, according to the actual position of the newly added steel beam 2, the notch 104 can also be set to disconnect the first lower flange plate 103 and the lower part of the first web 102 or only disconnect part of the first web 102. Accordingly, the position of the reinforcement component 3 should also be adaptively adjusted, which can also solve the problem of local interference between the original steel beam 1 and the newly added steel beam 2 when space is limited.

[0043] In some embodiments, the reinforcing rib 301 is connected to the upper surface of the first upper flange plate 101 rather than the lower surface. On the one hand, it is convenient for workers to perform welding operations. On the other hand, it can make the reinforcing rib 301 away from the neutral axis of the new section, which is beneficial to provide a larger resistance moment for the new section. Using the same material can better improve the stress performance of the section.

[0044] like Figure 2 and Figure 3 As shown, in some embodiments, the second web 202 is provided with a plurality of openings 204 horizontally distributed along the second direction, and each reinforcing rib 301 passes through an opening 204 to connect to the first upper flange plates 101 located on both sides of the newly added steel beam 2 .

[0045] Specifically, a plurality of openings 204 are horizontally distributed above the first upper flange plate 101 along the second direction, so that a plurality of reinforcing ribs 301 can pass through the openings 204 and fit the upper surface of the first upper flange plate 101. During operation, before installing the newly added steel beam 2, the construction personnel set a plurality of openings 204 at the predetermined position of the second web 202, and pass the reinforcing ribs 301 through the openings 204 and place them on the newly added steel beam 2. After the newly added steel beam 2 passes through the notch 104 and is installed on the original steel beam 1, the reinforcing ribs 301 are welded and connected to the upper surface of the first upper flange plate 101. In other embodiments, the openings 204 can also be set at the position on the second web 202 corresponding to the upper part of the first web 102 according to actual conditions.

[0046] In some embodiments, the reinforcing rib 301 and the newly added steel beam 2 are welded and connected at the opening 204 .

[0047] Specifically, after the operator passes the reinforcing bar 301 through the opening 204 and places it on the newly added steel beam 2, in order to ensure the stability of the reinforcing bar 301 during the construction process and improve the overall stability of the intersection node, the reinforcing bar 301 is welded to the newly added steel beam 2. In other embodiments, in order to facilitate construction, the reinforcing bar 301 and the newly added steel beam 2 can also be connected by using a building structural adhesive.

[0048] like Figure 2 and Figure 6 As shown, in some embodiments, the first reinforcement plates 302 are symmetrically arranged along the plane where the first web 102 is located.

[0049] Specifically, in order to ensure that the new section composed of the reinforcement component 3 and the weak section of the original steel beam 1 is stable in stress, the first reinforcement plate 302 is divided into two parts, which are symmetrically arranged on both sides of the first web 102, which is beneficial to improve the uniform stress of the new section under load, reduce the torsional effect of the structure, and improve the seismic performance of the structure.

[0050] like Figure 1 As shown, in some embodiments, a stiffening plate 304 is vertically connected to the first web plate 102 , and one end of the stiffening plate 304 is connected to the first upper flange plate 101 , and the other end is connected to the first reinforcement plate 302 .

[0051] Specifically, the stiffening plate 304 is arranged on the first web 102 near the slot 104 to improve the local stability of the original steel beam 1 at the weak section, and can effectively improve the torsional stiffness at the intersection node position to prevent the first upper flange plate 101 and the first reinforcement plate 302 from bending and deformation.

[0052] In some embodiments, a plurality of stiffening plates 304 are disposed on the first web 102 , and the plurality of stiffening plates 304 are distributed on both sides of the slot 104 along the first direction.

[0053] Specifically, stiffening plates 304 are provided on both sides of the slot 104 along the first direction. At the same time, the plurality of stiffening plates 304 are symmetrical along the plane where the first web 102 is located, which can ensure that the I-beam cross node modification structure can be uniformly stressed under load, so that the structure can obtain better stress performance.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the reinforcement assembly 3 further includes a second reinforcement plate 303 connected to the lower surface of the first lower flange plate 103 along the first direction.

[0055] Specifically, the second reinforcing plate 303 is welded to the lower surface of the first lower flange plate 103, and together with the weak section, reinforcing ribs 301 and the first reinforcing plate 302, forms a new section to resist the node load. When there is a large construction space below the original steel beam 1 where the newly added steel beam 2 does not need to be installed, in order to ensure the stability of the node, the second reinforcing plate 303 is arranged on the lower surface of the first lower flange plate 103, which can effectively increase the resistance moment of the new section and improve the stability of the node.

[0056] like Figure 1 and Figure 2 As shown, in some embodiments, the second reinforcing plate 303 includes a vertical portion 305 connected to the first lower flange plate 103 and a horizontal portion 306 connected below the vertical portion 305, and the second reinforcing plate 303 is symmetrical along the plane where the first web plate 102 is located. Specifically, the vertical portion 305 can effectively increase the vertical distance from the horizontal portion 306 to the neutral axis of the new section, so as to improve the resistance moment of the new section.

[0057] like Figure 1 and Figure 6 As shown, in some embodiments, chamfers are provided around the first reinforcing plate 302 away from the first web 102 and around the horizontal portion 306 of the second reinforcing plate 303 to facilitate edge stress release and reduce the occurrence of structural edge cracks.

[0058] like Figure 7 and Figure 8 As shown, in some embodiments, in order to ensure that the node has sufficient bearing capacity and avoid waste caused by excessive use of materials, before the structure is constructed, the resistance moment W of the original cross section of the original steel beam 1 is x Calculate and then design the resistance moment W of the new section composed of the reinforcement component 3 and the weak section of the original steel beam 1 xs Calculate and compare the two to ensure that the existing design is xs ≥W x , ensuring that the load resistance of the intersection node is not lower than that of the original steel beam 1. The specific calculation process is as follows.

[0059] Step 1: Calculate the original section resistance moment W x ,like Figure 8 As shown, the cross-sectional data of the original steel beam 1 are measured, including: height H, width B, flange plate thickness d and web plate thickness c, and the following is obtained:

[0060]

[0061] Step 2: Convert the cross section of the reinforcing bar 301. Usually, when reinforcement construction is carried out, the reinforcing bar 301 is made of high-strength steel bars with a strength greater than that of the original steel beam 1. Therefore, before calculating the resistance moment of the new cross section, the area of ​​the reinforcing bar 301 needs to be converted into an equivalent area with the same strength as the original steel beam 1.

[0062] Specifically, the strength of the reinforcing rib 301 is f s , the cross-sectional area of ​​the reinforcing rib 301 is A s , the steel strength of the original steel beam 1 is f y , then the converted area A 补强筋 for:

[0063] A 补强筋 =A s *f s / f y ;

[0064] Step 3: Calculate the position of the neutral axis n of the new section, take the horizontal plane where the center of the reinforcing rib 301 located at the upper edge of the new section is located as the reference plane, and calculate the vertical distance y from the neutral axis n to the reference plane.

[0065] First, calculate the area of ​​each part of the new section and the area moment of the reference surface:

[0066] part Area A Area moment S about the reference surface Horizontal part 306 <![CDATA[A1=B1t1]]> <![CDATA[S1=B1t1d1]]> Vertical portion 305 <![CDATA[A2=B2t2]]> <![CDATA[S2=B2t2d2]]> First reinforcement plate 302 <![CDATA[A3=2*B3t3]]> <![CDATA[S3=2*B3t3d3]]> First lower flange plate 103 <![CDATA[A 下翼缘 =Bd]]> <![CDATA[S 下翼缘 =Bd*d 下翼缘 ]]> First web 102 <![CDATA[A 腹板 =(H-x-2d)*c]]> <![CDATA[S 腹板 =(H-x-2d)*c*d 腹板 ]]>

[0067] in,

[0068] d x represent Figure 7 The vertical distance from the center of each component shown in to the reference plane;

[0069] B x ,t x , B, H, d, x, c represent Figure 7 The size parameters of each component shown in ;

[0070] The vertical distance y from the neutral axis n to the reference plane is calculated as:

[0071]

[0072] Step 4: Calculate the moment of inertia I` of the new section about the center axis n x ;

[0073] I` x =I1+I2+I3+I 下翼缘 +I 腹板 +I 补强筋 =

[0074] A1*(d1-y) 2 +A2*(d2-y) 2 +A3*(d3-y) 2 +A 下翼缘 *(d 下翼缘 -y)2+A web*(d web-y)2+A reinforcement bar*y2;

[0075] Step 5: Calculate the resistance moment of the upper and lower edges of the new section;

[0076] in,

[0077] The upper edge resistance moment W of the new section xs上 W xs上 =I` x / y;

[0078] The upper edge resistance moment W of the new section xs下 W xs下 =I` x / (d1+t1 / 2-y);

[0079] The sixth step is equal strength determination. When the following requirements are met, it can be considered that the resistance moment of the new section is greater than that of the original section;

[0080] W xs上 ≥W x And W xs下 ≥W x ;

[0081] On the premise that the new cross section meets the equal strength judgment, the material usage of the reinforcement component 3 can be optimized to save the transformation cost.

[0082] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0083] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An I-beam cross node reconstruction structure, characterized in that: include: An original steel beam (1), the original steel beam (1) being arranged horizontally along a first direction and having a notch (104) formed thereon; A newly added steel beam (2), wherein the newly added steel beam (2) is arranged horizontally along the second direction and the newly added steel beam (2) can pass through the slot (104) to be installed at a designed position; A reinforcing component (3), wherein the reinforcing component (3) is connected to the notch (104) of the original steel beam (1) along a first direction to increase the cross-sectional area of ​​the original steel beam (1) at the notch (104).

2. The I-beam intersection node reconstruction structure according to claim 1 is characterized in that: The original steel beam (1) comprises a first upper flange plate (101), a first web plate (102) and a first lower flange plate (103), and the newly added steel beam (2) comprises a second upper flange plate (201), a second web plate (202) and a second lower flange plate (203); wherein, The notch (104) is configured to disconnect the first upper flange plate (101) and the upper part of the first web plate (102); the reinforcing assembly (3) comprises a plurality of reinforcing ribs (301) passing through the second web plate (202) and connected to the first upper flange plate (101), and a first reinforcing plate (302) horizontally arranged at the lower part of the first web plate (102) and located below the notch (104).

3. The I-beam intersection node reconstruction structure according to claim 1, characterized in that: The original steel beam (1) and the newly added steel beam (2) are welded and connected at the notch (104).

4. The I-beam intersection node reconstruction structure according to claim 2, characterized in that: The second web (202) is provided with a plurality of openings (204) horizontally distributed along a second direction, and each of the reinforcing ribs (301) passes through one of the openings (204) to connect to the first upper flange plates (101) located on both sides of the newly added steel beam (2).

5. The I-beam intersection node reconstruction structure according to claim 4 is characterized in that: The reinforcing rib (301) and the newly added steel beam (2) are welded and connected at the opening (204).

6. The I-beam intersection node reconstruction structure according to claim 2, characterized in that: The first reinforcing plate (302) is symmetrically arranged along the plane where the first web (102) is located.

7. The I-beam intersection node reconstruction structure according to claim 2, characterized in that: A stiffening plate (304) is vertically connected to the first web (102), one end of the stiffening plate (304) is connected to the first upper flange plate (101), and the other end is connected to the first reinforcement plate (302).

8. The I-beam intersection node reconstruction structure according to claim 7, characterized in that: A plurality of stiffening plates (304) are arranged on the first web (102), and the plurality of stiffening plates (304) are distributed on both sides of the slot (104) along a first direction.

9. The I-beam intersection node reconstruction structure according to claim 2, characterized in that: The reinforcement assembly (3) further comprises a second reinforcement plate (303) connected to the lower surface of the first lower flange plate (103) along a first direction.

10. The I-beam intersection node reconstruction structure according to claim 9, characterized in that: The second reinforcing plate (303) comprises a vertical portion (305) connected to the first lower flange plate (103) and a horizontal portion (306) connected below the vertical portion (305), and the second reinforcing plate (303) is symmetrical along the plane where the first web plate (102) is located.

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