Primary and secondary beam rigid connection structure and parameter determination method

Abstract

The invention provides a main and secondary beam rigid connection structure and a parameter determination method. The main and secondary beam rigid connection structure comprises an I-shaped main beam; the I-shaped secondary beam is perpendicular to the I-shaped main beam and is in bolted connection with the I-shaped main beam; the I-shaped main beam and the I-shaped secondary beam are equal in beam height; the reinforcing angle steel and the reinforcing plate are welded with the I-shaped main beam and the I-shaped secondary beam respectively, and the I-shaped main beam and the I-shaped secondary beam are fixedly connected through the reinforcing angle steel and the reinforcing plate. According to the scheme, the tops of the primary beam and the secondary beam in the rigid connection structure of the primary beam and the secondary beam are flush, the beam tops are not shielded by connecting steel plates, and meanwhile effective transmission of bending moment and shearing force is met.

Description

Technical Field

[0001] This invention relates to the field of steel structure connection technology, and in particular to a rigid connection structure for primary and secondary beams and a method for determining its parameters. Background Technology

[0002] In steel structure engineering, rigid connections between primary and secondary beams are a key node form to ensure the overall structural performance. Their core function is to effectively transfer bending moment and shear force, enabling the primary and secondary beams to form a collaborative load-bearing system. Currently, the mainstream rigid connection methods for primary and secondary beams are mainly divided into two categories: one is a fully high-strength bolted connection, where the flanges of the primary and secondary beams are fastened together via flange connection plates, and the web of the secondary beam is fastened to the stiffening plate of the primary beam, relying on the bolt group to transfer bending moment and shear force; the other is a bolted-welded hybrid connection, typically using welding between the flanges of the secondary beam and the flanges of the primary beam, and connecting the web to the stiffening plate of the primary beam with high-strength bolts, utilizing the welds to transfer bending moment and the bolts to transfer shear force.

[0003] However, both of the aforementioned traditional connection methods have significant technical drawbacks: to achieve moment transfer, connecting steel plates must be installed on the upper flanges of the primary and secondary beams, and these plates must protrude above or cover the beam top area, resulting in protruding structures or obstructions on the beam top. This issue directly affects the installation of equipment on the beam top (such as pipe supports, lighting equipment, and small mechanical devices), requiring additional cutting or avoidance of the connecting steel plates, increasing construction costs and time, and potentially weakening the joint connection strength due to avoidance design. Furthermore, for existing steel structure buildings (such as old factory renovations or existing floor reinforcement), if there are already floors, ceilings, or existing equipment on the beam top, the traditional rigid connection method cannot be directly applied to the engineering requirements of reinforcing simply supported secondary beams into continuous beams due to the presence of the connecting steel plates. This necessitates large-scale demolition and reconstruction of the existing structure for reinforcement, resulting in poor economic efficiency and high construction risks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rigid connection structure of primary and secondary beams and a method for determining parameters, which can achieve flush tops of primary and secondary beams and no connecting steel plates obstructing the tops of the beams, while simultaneously satisfying the effective transmission of bending moment and shear force.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A rigid connection structure between primary and secondary beams, comprising: I-shaped main beam; An I-shaped secondary beam is perpendicular to the I-shaped main beam and bolted to it; the I-shaped main beam and the I-shaped secondary beam have the same beam height. Reinforcing angle steel and reinforcing plates are welded to the I-shaped main beam and the I-shaped secondary beam respectively, and the reinforcing angle steel and reinforcing plates fix the I-shaped main beam and the I-shaped secondary beam in place. Optionally, the cross-section of the I-beam is "I" shaped, and the upper and lower flanges of the I-beam have a first stiffening plate and a second stiffening plate that are perpendicular to each other. The first stiffening plate and the second stiffening plate are arranged on both sides of the web of the main beam and are perpendicular to the web of the main beam.

[0006] Optionally, the top of the web of the I-shaped secondary beam has a forward-protruding secondary beam connection portion, which is connected to the first stiffening plate or the second stiffening plate by a plurality of shear bolts.

[0007] Optionally, the thickness of the first stiffening plate and the second stiffening plate is greater than or equal to the thickness of the web of the secondary beam of the I-beam.

[0008] Optionally, the cross-section of the reinforcing angle steel is "L" shaped, with the long arm of the L-shaped reinforcing angle steel welded to the upper flange of the I-shaped main beam and the I-shaped secondary beam; the short arm of the L-shaped reinforcing angle steel is welded to the web of the I-shaped main beam.

[0009] Optionally, the I-shaped secondary beam is welded to the I-shaped main beam by two reinforcing angle steels. The two reinforcing angle steels are respectively arranged on both sides of the web of the I-shaped secondary beam and welded to the left and right wings of the upper flange of the I-shaped secondary beam.

[0010] Optionally, the reinforcing plate is located at the bottom of the lower flange of the I-shaped main beam and the I-shaped secondary beam, and is welded to the lower flange of the I-shaped main beam and the I-shaped secondary beam.

[0011] The present invention also provides a method for determining the structural parameters of a rigid connection between primary and secondary beams, wherein the rigid connection structure between primary and secondary beams is as described above, and the method includes: Obtain the design values ​​of bending moment and shear force for the I-shaped secondary beam; Based on the bending moment design value, determine the structural parameters of the reinforcing angle steel and the reinforcing plate; Based on the shear force design value, determine the structural parameters and quantity of the shear bolts; Based on the structural parameters of the reinforcing angle steel and the reinforcing plate, the overall stiffness and weld strength of the rigid connection structure of the main and secondary beams were verified, and the verification results were obtained.

[0012] Optionally, based on the bending moment design value, the structural parameters of the reinforcing angle steel and the reinforcing plate are determined, including: Determine the bearing capacity threshold based on the bending moment design value; The structural parameters of the reinforcing angle steel and the reinforcing plate are determined based on the aforementioned load-bearing capacity threshold.

[0013] Optionally, based on the structural parameters of the reinforcing angle steel and the reinforcing plate, the overall stiffness and weld strength of the rigid connection structure between the main and secondary beams are verified, and the verification results are obtained, including: Based on the structural parameters of the reinforcing angle steel and the reinforcing plate, the strength of the fillet weld of the reinforcing angle steel and the strength of the weld of the reinforcing plate are verified, and the first verification result is obtained. Based on the structural parameters of the reinforcing angle steel and the reinforcing plate, the nodal rotational stiffness and ultimate bearing capacity of the rigid connection structure of the main and secondary beams are verified, and a second verification result is obtained. Based on the first verification result and the second verification result, the verification result is obtained.

[0014] The above-described solution of the present invention has at least the following beneficial effects: The above-described solution of the present invention utilizes an I-shaped main beam; an I-shaped secondary beam perpendicular to and bolted to the I-shaped main beam; the main beam and the secondary beam having equal heights; and reinforcing angle steel and reinforcing plates welded to the main beam and the secondary beam respectively, which securely connect the main beam and the secondary beam. This achieves flush tops between the main and secondary beams, with no connecting steel plates obstructing the beam tops, while simultaneously ensuring effective transmission of bending moment and shear force. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the rigid connection structure of the primary and secondary beams according to an embodiment of the present invention; Figure 2 This is a top view of the rigid connection structure of the primary and secondary beams according to an embodiment of the present invention; Figure 3 This is a flowchart of a method for determining the structural parameters of a rigid connection between primary and secondary beams according to an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1. I-beam main beam; 2. I-beam secondary beam; 3. Reinforcing angle steel; 4. Reinforcing plate; 5. Shear bolt; 11. First stiffening plate; 12. Second stiffening plate; 21. Secondary beam connection. Detailed Implementation

[0016] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0017] like Figure 1 As shown, an embodiment of the present invention proposes a rigid connection structure between primary and secondary beams, comprising: I-shaped main beam 1; A secondary I-beam 2 is perpendicular to the main I-beam 1 and bolted to it; the main I-beam 1 and the secondary I-beam 2 have the same beam height. Reinforcing angle steel 3 and reinforcing plate 4 are welded to the I-shaped main beam 1 and the I-shaped secondary beam 2 respectively, and the reinforcing angle steel 3 and reinforcing plate 4 fix the I-shaped main beam 1 and the I-shaped secondary beam 2 in a fixed connection.

[0018] In this embodiment, both the I-shaped main beam 1 and the I-shaped secondary beam 2 are I-shaped steel sections, including an upper flange, a lower flange, and a web. The top surface of the upper flange of the secondary beam 2 is flush with the top surface of the upper flange of the main beam 1, and the web of the secondary beam 2 is arranged perpendicularly to the web of the main beam 1. The main beam 1 and the secondary beam 2 are connected by shear bolts 5 and fixed by welding with reinforcing angle steel 3 and reinforcing plate 4. The shear bolts 5 transmit shear force, and the reinforcing angle steel 3 and reinforcing plate 4 transmit bending moment. The shear bolts 5, reinforcing angle steel 3, and reinforcing plate 4 increase the strength of the rigid connection node between the main and secondary beams, ensuring the stability of the structure. In an optional embodiment of the present invention, the cross-section of the I-beam main beam 1 is "I" shaped, and there is a first stiffening plate 11 and a second stiffening plate 12 perpendicular between the upper flange and the lower flange of the I-beam main beam 1. The first stiffening plate 11 and the second stiffening plate 12 are arranged on both sides of the web of the main beam and are perpendicular to the web of the main beam.

[0019] In this embodiment, the I-beam main beam 1 consists of three parts: an upper flange, a lower flange, and a web. These three parts are integrally formed in a factory to form an "I" shape in cross-section. For welding to the I-beam secondary beam 2, at the intersection of the I-beam main beam 1 and the I-beam secondary beam 2, a first stiffening plate 11 and a second stiffening plate 12 are welded to the left and right sides of the web of the I-beam main beam 1, respectively. The structural relationship between the first stiffening plate 11, the second stiffening plate 12, and the I-beam main beam 1 is as follows: Figure 2 As shown, it is perpendicular to the web of the main beam. The height of the first stiffening plate 11 and the second stiffening plate 12 is the same as the height of the web of the main beam, and their length extends to between the upper and lower flanges of the main beam. Furthermore, the thickness of the first stiffening plate 11 and the second stiffening plate 12 is greater than or equal to the thickness of the web of the secondary beam of the I-beam 2.

[0020] In an optional embodiment of the present invention, the top of the web of the I-shaped secondary beam 2 has a forward-protruding secondary beam connection part 21, and the secondary beam connection part 21 is connected to the first stiffening plate 11 or the second stiffening plate 12 by a plurality of shear bolts 5.

[0021] In this embodiment, the I-beam main beam 1 can be connected to one or two I-beam secondary beams 2. When the I-beam main beam 1 is connected to an I-beam secondary beam 2, the secondary beam connection part 21 of the I-beam secondary beam 2 is connected to its corresponding stiffening plate. Figure 1 As shown, when two I-shaped secondary beams 2 are connected to each side of the I-shaped main beam 1, the secondary beam connection part 21 of the two I-shaped secondary beams 2 is connected to the first stiffening plate 11 and the second stiffening plate 12 respectively.

[0022] In an optional embodiment of the present invention, the cross-section of the reinforcing angle steel 3 is "L" shaped, the long arm of the L-shaped reinforcing angle steel 3 is welded to the upper flange of the I-shaped main beam 1 and the I-shaped secondary beam 2; the short arm of the L-shaped reinforcing angle steel 3 is welded to the web of the I-shaped main beam 1.

[0023] The I-shaped secondary beam 2 is welded to the I-shaped main beam 1 by two reinforcing angle steels 3. The two reinforcing angle steels 3 are respectively arranged on both sides of the web of the I-shaped secondary beam 2 and are welded to the left and right wings of the upper flange of the I-shaped secondary beam 2.

[0024] In this embodiment, the reinforcing angle steel 3 is an unequal-sided angle steel, and each I-shaped secondary beam 2 is welded to the I-shaped main beam 1 by two reinforcing angle steels 3. The two reinforcing angle steels 3 are symmetrically arranged on both sides below the upper flange of the I-shaped secondary beam 2; the long arm of each reinforcing angle steel 3 is welded and fixed to the lower surface of the upper flange of the secondary beam by a full penetration fillet weld, and the other short arm is welded and fixed to the outer side of the web of the main beam by a full penetration fillet weld.

[0025] In an optional embodiment of the present invention, the reinforcing plate 4 is located at the bottom of the lower flange of the I-shaped main beam 1 and the I-shaped secondary beam 2, and is welded to the lower flange of the I-shaped main beam 1 and the I-shaped secondary beam 2.

[0026] In this embodiment, the reinforcing plate 4 is a rectangular steel plate, and there is one reinforcing plate 4, which is arranged on the lower surface of the lower flange of the I-shaped main beam 1 and the I-shaped secondary beam 2. One side of the reinforcing plate 4 is welded and fixed to the lower surface of the lower flange of the secondary beam by a full penetration butt weld, and the other side is welded and fixed to the lower flange of the main beam by a full penetration fillet weld.

[0027] The rigid connection structure of primary and secondary beams in this invention overcomes the shortcomings of existing rigid connection methods where the connecting steel plate at the top of the beam obstructs the beam top, affecting equipment installation and the reinforcement of existing structures. The rigid connection structure of primary and secondary beams in this invention features flush primary and secondary beam tops with no obstruction at the beam top, and can stably transmit bending moment and shear force, meeting the requirements for equipment installation on the beam top in new construction projects and the need to reinforce simply supported secondary beams in existing structures into continuous beams.

[0028] like Figure 3As shown, embodiments of the present invention also provide a method for determining the parameters of a rigid connection structure between primary and secondary beams, wherein the rigid connection structure between primary and secondary beams is as described above, and the method includes: Step 11: Obtain the design values ​​of bending moment and shear force for the I-beam 2; Here, based on the node positions of the I-beam main beam and the I-beam secondary beam in the building structure, the overall building structure is calculated to obtain the design values ​​of the beam end bending moments of the I-beam secondary beam 2 under permanent loads and variable loads, denoted as M. Based on the overall structural calculation, the design values ​​of the beam end shear forces of the I-beam secondary beam 2 under various loads are obtained, denoted as V.

[0029] Step 12: Determine the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4 based on the bending moment design value; Here, step 12 specifically includes: Step 121: Determine the bearing capacity threshold based on the bending moment design value; The method for calculating the bearing capacity threshold is as follows: Where H is the bearing capacity threshold, M is the bending moment design value, This is the height of the secondary beam web, i.e., the moment arm.

[0030] Step 122: Determine the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4 based on the bearing capacity threshold.

[0031] Here, the reinforcing angle steel 3 and the reinforcing plate 4 are divided into several different models due to different structural parameters. The selection of the reinforcing angle steel 3 and the reinforcing plate 4 from the several available models is determined to select the reinforcing angle steel 3 and the reinforcing plate 4 with the target structural parameters.

[0032] The structural parameters of the reinforcing angle steel 3 include the cross-sectional area of ​​the angle steel and the design value of the tensile strength of the angle steel. Ensure that the total tensile bearing capacity of the two reinforcing angle steels 3 with the selected target structural parameters is greater than or equal to the bearing capacity threshold. That is... ,in , ,in For the total tensile bearing capacity of the two reinforcing angle steels 3, To enhance the tensile bearing capacity of a reinforced angle steel, For the cross-sectional area of ​​a single reinforcing angle steel 3, This is the design value for the tensile strength of angle steel.

[0033] The structural parameters of the reinforcing plate 4 include the effective pressure-bearing area of ​​the reinforcing plate (i.e., width multiplied by thickness) and the design compressive strength of the reinforcing plate steel. It is ensured that the compressive bearing capacity of the reinforcing plate with the selected target structural parameters is greater than or equal to the bearing capacity threshold. ,in To enhance the compressive bearing capacity of the plate, ,in To strengthen the effective pressure-bearing area of ​​the plate, To enhance the design value of compressive strength of plate steel.

[0034] Step 13: Determine the structural parameters and quantity of the shear bolts 5 based on the shear force design value; Here, the structural parameters of the shear bolt 5 include the hole shape coefficient k and the number of shear surfaces of the bolt. The friction surface slip coefficient μ and the preload design value P are used to calculate the shear bearing capacity of the shear bolts, ensuring that the total shear bearing capacity of the target number of shear bolts is greater than or equal to the shear force design value V. The shear bearing capacity of the shear bolts is... ,make sure Where n is the number of shear bolts (5). It should be noted that the distance between the edges of two bolts must be ≥2. Center distance ≥ 3 ,in This refers to the bolt hole diameter.

[0035] Step 14: Based on the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4, the overall stiffness and weld strength of the rigid connection structure of the main and secondary beams are verified, and the verification results are obtained.

[0036] Here, after the structural parameters have been initially determined, the structural reliability of the reinforcing angle steel 3 and the reinforcing plate 4 is further verified. Step 14 specifically includes: Step 141: Based on the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4, verify the strength of the fillet weld of the reinforcing angle steel and the strength of the weld of the reinforcing plate to obtain the first verification result; Here, the strength of the fillet weld between the reinforcing angle steel 3 and the upper flange of the secondary beam and the web of the main beam is verified. The formula is as follows: ,in For fillet weld height, Calculate the length of the weld. To enhance the tensile bearing capacity of a reinforced angle steel, This refers to the strength of the fillet weld. Verify whether the strength of the fillet weld is less than or equal to the design strength value, i.e. ,in This is the design value for the strength of the fillet weld.

[0037] Further calculations were performed on the weld strength between the reinforcing plate and the lower flange of the secondary beam and the lower flange of the main beam, which will not be elaborated here. The strength of the fillet weld and the weld of the reinforcing plate were verified separately, and the first verification results were obtained.

[0038] Step 142: Based on the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4, the nodal rotational stiffness and ultimate bearing capacity of the rigid connection structure of the main and secondary beams are verified to obtain the second verification result; Here, the rotational stiffness of the nodes in the rigid connection structure of the primary and secondary beams is verified to ensure that the node rotational stiffness is greater than or equal to 1 × 10⁵ kN•m / rad. (Node rotational stiffness) Where K is the node rotational stiffness, M is the design bending moment, and θ is the elastic rotation angle of the node under the action of bending moment M, which are obtained by finite element analysis or simplified formula calculation.

[0039] Further verification of the ultimate bearing capacity was conducted to confirm whether the ultimate bearing capacity of the node was greater than or equal to 1.2 × M, i.e. ,in To enhance the minimum ultimate bearing capacity of angle steel 3, reinforcing plate 4, fillet weld and reinforcing plate weld.

[0040] Step 143: Obtain the verification result based on the first verification result and the second verification result.

[0041] Here, under the condition that the first verification result is that the fillet weld strength and the reinforcing plate weld strength pass, and the second verification result is that the node rotation stiffness and ultimate bearing capacity pass, the structural parameters of the reinforcing angle steel 3 and the reinforcing plate 4, as well as the structural parameters and quantity of the shear bolts 5, are verified and the results are obtained.

[0042] The above embodiments of the present invention solve the technical problem that the steel plate connecting the top of the beam in the traditional rigid connection structure of primary and secondary beams obscures the top of the beam, resulting in inconvenience for the installation of equipment on the beam and difficulty in reinforcing the existing structure. Specifically, it can be broken down into the following two points: Problems with the installation of equipment on the top of beams in new construction projects: Traditional rigid connections between main and secondary beams (all high-strength bolt connections, bolt-welded hybrid connections) require connecting steel plates (end plates, flange connecting plates) to be installed on the upper flanges of the main and secondary beams. These steel plates will protrude or cover the top area of ​​the beam, directly blocking the installation space on the top of the beam. This makes it impossible to directly install equipment on the beam such as pipes, supports, and small machinery. Additional cutting and avoidance of the connecting steel plates are required, which increases construction costs and time, and may also weaken the strength of the joint connection.

[0043] The compatibility issues of converting simply supported secondary beams into continuous beams in the reinforcement of existing structures: For existing steel structures with existing floor slabs, ceilings, or existing equipment on the top of the beam (such as old factory renovation and floor reinforcement), traditional rigid connections cannot be achieved without demolishing the existing top structure of the beam due to the presence of the connecting steel plate on the top of the beam. This results in large-scale demolition and modification of the existing structure when reinforcing simply supported secondary beams into continuous beams, which has high construction risks, poor economic efficiency, and makes it difficult to meet the requirements of increasing the load-bearing capacity of the secondary beams.

[0044] The technology achieves a rigid connection structure where the tops of the primary and secondary beams are flush and unobstructed, and can stably transmit bending moment and shear force, thus meeting the technical requirements for equipment installation on the beam tops of new projects and for reinforcing existing simply supported secondary beams into continuous beams.

[0045] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rigid connection structure between primary and secondary beams, characterized in that, include: I-shaped main beam (1); A secondary I-beam (2) is perpendicular to the main I-beam (1) and bolted to the main I-beam (1); the main I-beam (1) and the secondary I-beam (2) have the same beam height; Reinforcing angle steel (3) and reinforcing plate (4) are welded to the I-shaped main beam (1) and the I-shaped secondary beam (2) respectively, and the reinforcing angle steel (3) and reinforcing plate (4) fix the I-shaped main beam (1) and the I-shaped secondary beam (2) in a fixed connection.

2. The rigid connection structure of primary and secondary beams according to claim 1, characterized in that, The cross section of the I-beam (1) is "I". The upper and lower flanges of the I-beam (1) have a first stiffening plate (11) and a second stiffening plate (12) that are perpendicular to each other. The first stiffening plate (11) and the second stiffening plate (12) are arranged on both sides of the web of the main beam and are perpendicular to the web of the main beam.

3. The rigid connection structure of primary and secondary beams according to claim 2, characterized in that, The secondary beam (2) has a forward-protruding secondary beam connection part (21) at the top of the web of the secondary beam. The secondary beam connection part (21) is connected to the first stiffening plate (11) or the second stiffening plate (12) by a plurality of shear bolts (5).

4. The rigid connection structure of primary and secondary beams according to claim 2, characterized in that, The thickness of the first stiffening plate (11) and the second stiffening plate (12) is greater than or equal to the thickness of the web of the secondary beam of the I-beam (2).

5. The rigid connection structure of primary and secondary beams according to claim 1, characterized in that, The cross section of the reinforcing angle steel (3) is "L" shaped. The long arm of the L-shaped reinforcing angle steel (3) is welded to the upper flange of the I-shaped main beam (1) and the I-shaped secondary beam (2); the short arm of the L-shaped reinforcing angle steel (3) is welded to the web of the I-shaped main beam (1).

6. The rigid connection structure of primary and secondary beams according to claim 1, characterized in that, The I-shaped secondary beam (2) is welded to the I-shaped main beam (1) by two reinforcing angle steels (3). The two reinforcing angle steels (3) are respectively arranged on both sides of the web of the I-shaped secondary beam (2) and are respectively welded to the left and right wings of the upper flange of the I-shaped secondary beam (2).

7. The rigid connection structure of primary and secondary beams according to claim 1, characterized in that, The reinforcing plate (4) is located at the bottom of the lower flange of the I-beam (1) and the I-beam (2) and is welded to the lower flange of the I-beam (1) and the I-beam (2).

8. A method for determining the structural parameters of a rigid connection between primary and secondary beams, characterized in that, The rigid connection structure between primary and secondary beams is the rigid connection structure between primary and secondary beams as described in any one of claims 1 to 7, and the method includes: Obtain the design values ​​of bending moment and shear force of the I-shaped secondary beam (2); Based on the bending moment design value, determine the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4); Based on the shear force design value, determine the structural parameters and quantity of the shear bolts (5); Based on the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4), the overall stiffness and weld strength of the rigid connection structure of the main and secondary beams were verified, and the verification results were obtained.

9. The method for determining the structural parameters of a rigid connection between primary and secondary beams according to claim 8, characterized in that, Based on the bending moment design value, the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4) are determined, including: Determine the bearing capacity threshold based on the bending moment design value; The structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4) are determined based on the bearing capacity threshold.

10. The method for determining the structural parameters of a rigid connection between primary and secondary beams according to claim 8, characterized in that, Based on the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4), the overall stiffness and weld strength of the rigid connection structure of the main and secondary beams are verified, and the verification results are obtained, including: Based on the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4), the strength of the fillet weld of the reinforcing angle steel and the strength of the weld of the reinforcing plate are verified, and the first verification result is obtained. Based on the structural parameters of the reinforcing angle steel (3) and the reinforcing plate (4), the nodal rotation stiffness and ultimate bearing capacity of the rigid connection structure of the main and secondary beams are verified, and the second verification result is obtained. Based on the first verification result and the second verification result, the verification result is obtained.

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