Steel support end enlarged joint structure design method

Abstract

The present invention relates to a design method for an enlarged joint structure at the end of a steel support, which is applicable to the field of steel support design. The technical solution adopted by the present invention is as follows: A design method for an enlarged joint structure at the end of a steel support includes: obtaining the cross-sectional parameter information of the steel column, steel beam, and steel support at the joint, as well as the steel strength information of the steel column, steel beam, and steel support; obtaining the form of the transition connection of the support flange at the joint selected by the user, including the support flange with a broken-line transition connection and stiffening, the support flange with an arc transition connection and without stiffening, and the support flange with an arc transition connection and stiffening; based on the form of the transition connection of the support flange, retrieving the overall structural requirements of the enlarged joint structure at the end of the steel support and the corresponding detailed structural requirements for this transition connection form; based on the cross-sectional parameter information and steel strength information of the steel column, steel beam, and steel support, and in combination with the overall structural requirements and detailed structural requirements, generating the structural parameter information of the enlarged joint structure at the end of the steel support.

Description

Technical Field

[0001] The present invention relates to a design method for the enlarged joint structure at the end of a steel support, which is applicable to the field of steel support design. Background Art

[0002] The support structure system is widely used in steel structure buildings, especially in multi-story and high-rise buildings and large-span truss structures. In such structures, the design of the connection joints between the frame beams, columns and supports is crucial. Whether the joint structure design is reasonable is related to the safety and reliability of the structural bearing capacity.

[0003] Referring to the "Code for Seismic Design of Buildings", the most basic requirement in the design of the connection joints between beams, columns and supports is that the joint bearing capacity is not less than the member bearing capacity (at this time, the member bearing capacity is the bearing capacity of the support). Otherwise, in the ultimate failure state, the continuous collapse problem of the structure will occur and the structural safety redundancy cannot be guaranteed. Therefore, the joint structure design should ensure this basic "equal strength principle".

[0004] At present, in the actual structural design in China, the design mostly refers to the atlas of "Details of Steel Structure Joints for Multi-story and High-rise Civil Buildings" (hereinafter referred to as the atlas). The joint structure mainly recommended in this atlas is the bracket connection. For example, "the bracket-type cantilever member is connected to the support member, and the cantilever member is usually designed in the form of an enlarged end". The original intention of the design is to enlarge the end, increase the stress area in the joint area, and reduce the stress level in the joint domain.

[0005] When the end of the joint area is enlarged and the flange is connected by turning, it will inevitably lead to the discontinuous transmission of the axial force of the support flange, and the stress of the web in the joint domain will change to a complex bi-axial tension. Further research is needed to ensure whether the joint area can guarantee sufficient bearing capacity.

[0006] Most of the structural parameter values recommended in the atlas are empirical values and do not accurately analyze the actual situation, which may have safety hazards. For example, for the stepped transition connection of the support flange, the atlas only simply requires that the thickness t of the enlarged support web j is greater than the thickness t of the support flange f ; for the arc transition connection of the support flange, the atlas only requires that the radius of the arc in the diagonal brace is ≥200, which is a broad empirical value.

[0007] At present, the design method of the joint structure at the enlarged end of such supports is not perfect in the corresponding specifications and atlases. If designers directly quote without detailed design or design based on experience, it will pose great safety hazards. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: in view of the above problems, to provide a design method for the enlarged joint structure at the end of a steel support.

[0009] The technical solution adopted by the present invention is as follows: A design method for the enlarged end joint structure of a steel support, comprising:

[0010] Obtain the cross-sectional parameter information of the steel column, steel beam, and steel support at the joint, as well as the steel strength information of the steel column, steel beam, and steel support;

[0011] Obtain the transition connection form of the support flange selected by the user at the joint, including the broken-line transition connection of the support flange with stiffening, the circular-arc transition connection of the support flange without stiffening, and the circular-arc transition connection of the support flange with stiffening;

[0012] Based on the transition connection form of the support flange, retrieve the overall structural requirements of the enlarged end joint of the steel support and the detailed structural requirements corresponding to this transition connection form;

[0013] Based on the cross-sectional parameter information and steel strength information of the steel column, steel beam, and steel support, and in combination with the overall structural requirements and detailed structural requirements, generate the structural parameter information of the enlarged end joint of the steel support;

[0014] The overall structural requirements are used to define the structural parameters of the enlarged end joint domain of the steel support based on the overall force-bearing requirements of the enlarged end joint of the steel support;

[0015] The detailed structural requirements are used to define the structural parameters of the detailed structure based on the force-bearing requirements of the detailed structure of the enlarged end joint of the steel support. The detailed structure includes the steel support flange, the web diffusion part, the stiffening rib, and the circular-arc part of the steel support flange transition.

[0016] The overall structural requirements include: The vertical shear strength of the joint domain is not less than the vertical component of the tensile yield of the steel support;

[0017] The detailed structural requirements for the broken-line transition connection of the support flange include: The cross-section after turning is at least as strong as the support cross-section, and the stiffening rib of the steel support can bear the component force transmitted from the flange;

[0018] The detailed structural requirements for the circular-arc transition connection of the support flange without stiffening include: Meeting the mechanical equilibrium condition of the axial tension of the web in the circular-arc section and the increased web width in the circular-arc section participating in the force-bearing, and meeting the mechanical equilibrium condition of the transverse bending of the flange in the circular-arc section and the transverse bending moment generated in the middle of the flange needs to be borne by the flange itself;

[0019] The detailed structural requirements for the circular-arc transition connection of the support flange with stiffening include: Meeting the mechanical equilibrium condition of the axial tension of the web in the circular-arc section and the increased web width in the circular-arc section participating in the force-bearing, the stiffening rib partition meeting the moment equilibrium condition and plastic hinge line distribution characteristics of the transverse bending of the flange, and meeting the mechanical equilibrium condition of the transverse tension of the flange in the circular-arc section.

[0020] The vertical shear strength of the joint domain is not less than the vertical component of the tensile yield of the steel support, including:

[0021] ;

[0022] In the formula, h j is the height where the enlarged support web at the end of the steel support connects to the steel column, t j is the thickness of the enlarged support web at the end of the steel support, h wb is the web height of the steel beam section, t wb is the web thickness of the steel beam section, A br is the cross-sectional area of the steel support, α is the horizontal angle between the axis of the steel support and the axis of the steel beam, f vy is the shear strength of the steel, f y is the yield strength of the steel.

[0023] The cross-section after turning is of equal strength to the support cross-section, including:

[0024] ;

[0025] In the formula, b is the flange width of the steel support, h w is the web height of the steel support, t f is the flange thickness of the steel support, t w is the web thickness of the steel support, β is the flange diffusion angle of the steel support, f y is the yield strength of the steel.

[0026] The stiffener of the steel support can bear the component force transmitted from the flange, including:

[0027] ;

[0028] In the formula, b is the flange width of the steel support, t f is the flange thickness of the steel support, β is the flange diffusion angle of the steel support, f y is the yield strength of the steel, t s is the thickness of the stiffener of the steel support.

[0029] The mechanical equilibrium condition of the axial tension of the web in the arc section is satisfied and the increased web width in the arc section participates in the force, including:

[0030] ;

[0031] In the formula, R is the radius of the transition arc of the steel support flange, b is the flange width of the steel support, t f is the flange thickness of the steel support, t j is the thickness of the enlarged support web at the end of the steel support.

[0032] The mechanical equilibrium condition of the lateral bending of the flange in the arc section is satisfied and the lateral bending moment generated in the middle of the flange needs to be borne by the flange itself, including:

[0033] ;

[0034] Wherein, R is the radius of the transition arc of the steel support flange, b is the width of the steel support flange, and t f is the thickness of the steel support flange.

[0035] The stiffener compartment satisfies the moment balance condition of the flange transverse bending and the plastic hinge line distribution characteristics, including:

[0036] a) When

[0037] ;

[0038] b) When

[0039] ;

[0040] Wherein, a is the length of the flange of the stiffener compartment, b is the width of the steel support flange, R is the radius of the transition arc of the steel support flange, and t f is the thickness of the steel support flange.

[0041] The satisfaction of the mechanical balance condition of the transverse tension of the flange in the arc section includes:

[0042] ;

[0043] Wherein, ts’ is the thickness of the stiffener in the arc section of the support flange, a is the length of the stiffener compartment, R is the radius of the transition arc of the steel support flange, and t f is the thickness of the steel support flange.

[0044] A device for the structural design of the enlarged end joint of a steel support, comprising:

[0045] An information acquisition module, configured to acquire the cross-sectional parameter information of the steel column, steel beam and steel support at the joint, as well as the steel strength information of the steel column, steel beam and steel support;

[0046] A connection form determination module, configured to acquire the transition connection form of the support flange at the joint selected by the user, including the transition connection of the support flange with a broken line and stiffening, the transition connection of the support flange with an arc and without stiffening, and the transition connection of the support flange with an arc and with stiffening;

[0047] A structural requirement retrieval module, configured to retrieve the overall structural requirements of the enlarged end joint of the steel support and the detailed structural requirements corresponding to the transition connection form based on the transition connection form of the support flange;

[0048] A parameter information generation module, configured to generate structural parameter information of the enlarged end node of the steel brace based on the sectional parameter information of the steel column, steel beam, and steel brace and the steel strength information, in combination with the overall structure requirements and the detailed structure requirements;

[0049] The overall structure requirements are used to define the structural parameters of the enlarged end node domain of the steel brace based on the overall force requirements of the enlarged end node of the steel brace;

[0050] The detailed structure requirements are used to define the structural parameters of the detailed structure based on the force requirements of the detailed structure of the enlarged end node of the steel brace. The detailed structure includes the steel brace flange, the diffusion part of the web, the stiffener, and the transition arc part of the steel brace flange.

[0051] A device for the structural design of the enlarged end node of a steel brace, having a memory and a processor. A computer program capable of being executed by the processor is stored on the memory. When the computer program is executed, the steps of the method for the structural design of the enlarged end node of the steel brace are implemented.

[0052] The beneficial effects of the present invention are as follows: The present invention scientifically sets the overall structure requirements for the transition connection forms of each support flange, and specifically sets the detailed structure requirements for each specific form. Thus, based on the sectional parameter information of the steel column, steel beam, and steel brace and the steel strength information of the steel brace, in combination with the overall structure requirements and the detailed structure requirements, the structural parameter information of the enlarged end node of the steel brace can be quantitatively determined through mechanical analysis. The obtained structural parameters meet the overall structure requirements and the detailed structure requirements, reducing potential safety hazards. The present invention provides a quantitative design method for the structure of the enlarged end node of the steel brace, provides a complete set of structural design formulas, simplifies the design process, and reduces potential safety hazards.

[0053] Different from the traditional detailed structure design in the atlas, the present invention proposes the overall structure design requirements. The detailed design must be carried out under the condition of meeting the overall structure design requirements. The overall structure requirements are applicable to the nodes of any support flange transition form and must be met to ensure that the structural design results meet the basic "equal strength principle".

[0054] Most of the detailed structure designs in the atlas are broad. The parameters determined based on the atlas in a specific steel structure project may have large redundancies, resulting in material losses and poor economic benefits; they may also not meet the specific force requirements of the steel structure project, leading to potential safety hazards. The present invention determines accurate node parameters based on the specific structural parameters of the steel column, steel beam, and steel brace around the node, in combination with the overall structure requirements and the detailed structure requirements, reducing potential safety hazards and lowering costs. Description of the Drawings

[0055] Figure 1 It is a flowchart of the embodiment.

[0056] Figure 2 Schematic diagram of the structural diagram of the support flange with a broken-line transition connection in the embodiment.

[0057] Figure 3 Schematic diagram of the structural diagram of the support flange with an arc transition connection and without stiffening in the embodiment.

[0058] Figure 4 Schematic diagram of the structural diagram of the support flange with an arc transition connection and with stiffening in the embodiment.

[0059] Figure 5 Schematic diagram showing that the increased web width δ in the arc segment in the embodiment should participate in the force.

[0060] Figure 6 Schematic diagram of the radial surface load in the flange of the arc segment in the embodiment.

[0061] Figure 7 For the average bearing capacity of the flange in the embodiment with respect to the parameter b 2 / Rt f Variation diagram.

[0062] Figure 8 Schematic diagram showing that the stiffening rib compartments in the embodiment satisfy the moment balance condition of the lateral bending of the flange and the distribution characteristics of the plastic hinge lines.

[0063] 1. Steel column; 2. Steel beam; 3. Steel support; 301. Enlarged end of the support; 4. Stiffening rib. Detailed implementation manner

[0064] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, they are only set for the convenience of description and illustration, and no limitation is made on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0065] In the description of the present invention, the meaning of "a plurality" is two or more. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of this technology.

[0066] Embodiment 1: As Figure 1As shown in the figure, this embodiment is a design method for the enlarged joint structure at the end of a steel support, specifically including the following steps:

[0067] S100. Obtain the sectional parameter information of the steel column, steel beam, and steel support at the joint, as well as the steel strength information of the steel column, steel beam, and steel support.

[0068] S200. Obtain the form of the transition connection of the support flange at the joint selected by the user. The selectable transition connection forms include the stepped transition connection of the support flange with stiffening (see Figure 2 ), the arc transition connection of the support flange without stiffening (see Figure 3 ), and the arc transition connection of the support flange with stiffening (see Figure 4 ).

[0069] In this embodiment, when the flange of the steel support end turns, two forms of stepped transition connection or arc transition connection can be adopted, including the stepped transition connection of the support flange and the arc transition connection of the support flange.

[0070] For the joint with a stepped transition connection of the support flange, a transverse stiffener must be set at the flange turning point; for the joint with an arc transition connection of the support flange, a stiffener can be set or not set in the arc section. When a stiffener is set, it is a short stiffener, which must be set at the starting point and the ending point of the arc, and is set at equal intervals (equally divided according to the arc length) in the middle section of the arc. The arrangement direction of the short stiffeners should be perpendicular to the tangent direction of the arc.

[0071] S300. Based on the form of the transition connection of the support flange, retrieve the overall structural requirements of the enlarged joint at the end of the steel support and the detailed structural requirements corresponding to this transition connection form.

[0072] In this embodiment, the structural design of the enlarged joint at the end of the steel support is divided into two parts: overall and detailed. Among them, the overall structural design requirements need to meet the vertical shear resistance requirements of the joint domain. Based on the vertical mechanical equilibrium conditions of the joint, ensure that the vertical shear strength of the joint domain composed of the enlarged support web at the end and the beam web is not less than the vertical component of the tensile yield of the diagonal brace, that is:

[0073] ;

[0074] In the formula, h j is the height of the enlarged support web at the end of the steel support connected to the steel column, t j is the thickness of the enlarged support web at the end of the steel support, h wb is the height of the web of the steel beam section, t wb is the thickness of the web of the steel beam section, A br is the sectional area of the steel support, α is the horizontal angle between the axis of the steel support and the axis of the steel beam, f vy is the shear strength of the steel, and f y is the yield strength of the steel.

[0075] In this example, the detailed structure design requirements are divided into three types according to different forms of flange turning at the end of the steel support and the requirements for circular arc stiffening, namely, the stiffening joint with folded line transition connection of the support flange, the unstiffened joint with circular arc transition connection of the support flange, and the stiffening joint with circular arc transition connection of the support flange, and the content of their structure design requirements is different.

[0076] 1) The detailed structure requirements for the stiffening joint with folded line transition connection of the support flange include: the cross-section after turning should be at least as strong as the support cross-section, and the stiffening rib of the steel support can bear the component force transmitted from the flange.

[0077] For the joint with folded line transition connection of the support flange, based on the axial mechanical equilibrium condition of the support, the cross-section after turning should ensure being as strong as the support cross-section, that is:

[0078] ;

[0079] In the formula, b is the width of the support flange, hw is the height of the support web, t f is the thickness of the support flange, t w is the thickness of the support web, and β is the diffusion angle of the support flange.

[0080] The above formula is simplified to obtain the detailed structure design requirements for the thickness t j of the enlarged end support web, that is

[0081] ;

[0082] The support stiffening rib should be able to bear the component force transmitted from the flange, that is:

[0083] ;

[0084] The above formula is simplified to obtain the detailed structure design requirements for the thickness t s of the support stiffening rib, that is

[0085] ;

[0086] 2) The detailed structure requirements for the unstiffened joint with circular arc transition connection of the support flange include: satisfying the mechanical equilibrium condition of axial tension of the web in the circular arc section and the increased web width in the circular arc section participating in the force, and satisfying the mechanical equilibrium condition of transverse bending of the flange in the circular arc section and the transverse bending moment generated in the middle of the flange being borne by the flange itself.

[0087] For the unstiffened joint with circular arc transition connection of the support flange, the mechanical equilibrium condition of axial tension of the web in the circular arc section should be satisfied. The increased web width δ in the circular arc section should participate in the force (see Figure 5 ), that is:

[0088] ;

[0089] Let , , . The above equation can be simplified to:

[0090] ;

[0091] The above is a non - linear differential equation about δ, and its solution is a circle with as the center and radius . That is, the detailed structural design requirement 1 for the radius R of the transition arc of the support flange is obtained, namely:

[0092] ;

[0093] For the unstiffened joint with an arc - transition connection of the support flange, the mechanical equilibrium condition of the lateral bending of the flange in the arc section should also be satisfied. The lateral bending moment generated in the middle of the flange needs to be borne by the flange itself, that is:

[0094] ;

[0095] After simplification, the above equation obtains the detailed structural design requirement 2 for the radius R of the transition arc of the support flange, namely:

[0096] ;

[0097] The detailed structural design requirement 2 for the radius R of the transition arc of the support flange can also be derived in the following way:

[0098] The tensile stress in the arc - shaped flange in the arc direction is σ z , and the stress σ z perpendicular to σ x is generated by the lateral bending. Using the Mises yield criterion, we have:

[0099] ;

[0100] Assume that the radial surface load in the arc section of the flange is uniform (see Figure 6 ), then we have:

[0101] ;

[0102] In the formula, the flange is in tension, points inward; the outside of the flange is in lateral tension, y is the coordinate in the thickness direction of the flange plate, and points outward from the joint. By combining the two equations and performing normalization, let , , then we have:

[0103] ;

[0104] Integrate σ z in the two directions of the flange width and thickness to obtain the average bearing capacity of the flange:

[0105] ;

[0106] The average bearing capacity of the flange can be obtained by using the numerical integration method with respect to the parameter b 2 / Rt f variation (see Figure 7 ). To make the bearing capacity of the flange close to the ultimate strength, b 2 / Rt f should be at least not greater than 4 / 3, which is equivalent to the detailed structural design requirement 2.

[0107] For the unstiffened joint supporting the arc transition connection of the flange, the detailed structural design requirements 1 and 2 for the transition arc radius R of the supporting flange should be satisfied simultaneously.

[0108] 3) The detailed structural requirements for the stiffened joint with an arc transition connection of the supporting flange include: satisfying the mechanical equilibrium condition of axial tension in the web of the arc section and the increased web width in the arc section participating in the force, the stiffener compartment satisfying the moment equilibrium condition and the plastic hinge line distribution characteristics of the transverse bending of the flange, and satisfying the mechanical equilibrium condition of transverse tension in the flange of the arc section.

[0109] For the stiffened joint with an arc transition connection of the supporting flange, the mechanical equilibrium condition of axial tension in the web of the arc section should still be satisfied, that is, the detailed structural design requirement 1 for the transition arc radius R of the supporting flange. When the detailed structural design requirement 2 for the transition arc radius R of the supporting flange is not satisfied, stiffeners should be provided in the arc section.

[0110] For the stiffened joint with an arc transition connection of the supporting flange, each stiffener compartment with a length of a should satisfy the moment equilibrium condition and the plastic hinge line distribution characteristics of the transverse bending of the flange (see Figure 8 ). Based on the principle of virtual work, the internal force work Wi is not less than the external force work We, where:

[0111] ;

[0112] In the formula, m is the ultimate moment per unit length, l is the length of the plastic hinge line, and Δ is the relative displacement of the plates on both sides of the hinge line.

[0113] ;

[0114] In the formula, q is the external load, is the volume displacement of the plate.

[0115] Since Wi ≥ We, so there is

[0116] ;

[0117] Based on the stiffening node structural form with the arc transition connection of the supporting flange in this embodiment and combined with the above virtual work principle, the following formula can be obtained:

[0118] a) When

[0119] ;

[0120] In the formula, e = 0.5a, c = 0.5(b - a), , .

[0121] After simplifying the above formula, the detailed structural design requirement 3-1 for the radius R of the transition arc of the supporting flange is obtained, that is:

[0122] ;

[0123] b) When

[0124] ;

[0125] After simplifying the above formula, the detailed structural design requirement 3-2 for the radius R of the transition arc of the supporting flange is obtained, that is:

[0126] ;

[0127] For the stiffening node with the arc transition connection of the supporting flange, the number of stiffening ribs in the arc section of the flange is n (n≥3), and the length of each interval of the stiffening rib .

[0128] Based on the mechanical equilibrium condition of the transverse tension of the arc section of the supporting flange, the detailed structural design requirement for the thickness ts’ of the stiffening rib in the arc section of the supporting flange is:

[0129] ;

[0130] S400. Based on the section parameter information and steel strength information of the steel column, steel beam and steel support, combined with the overall structural requirements and detailed structural requirements, generate the structural parameter information of the enlarged end node of the steel support that meets the overall structural requirements and corresponding detailed structural requirements.

[0131] Embodiment 2: This embodiment is a device for the structural design of the enlarged end node of a steel support, specifically including:

[0132] An information acquisition module, used to acquire the section parameter information of the steel column, steel beam and steel support at the node, as well as the steel strength information of the steel column, steel beam and steel support;

[0133] The connection form determination module is used to obtain the support flange transition connection form selected by the user, including the support flange with a broken line transition connection and stiffening, the support flange with an arc transition connection and no stiffening, and the support flange with an arc transition connection and stiffening;

[0134] The construction requirement retrieval module is used to retrieve the overall construction requirements of the enlarged end node of the steel support and the corresponding detailed construction requirements of this transition connection form based on the support flange transition connection form;

[0135] The parameter information generation module is used to generate the structural parameter information of the enlarged end node of the steel support based on the section parameter information and steel strength information of the steel column, steel beam and steel support, in combination with the overall construction requirements and detailed construction requirements.

[0136] The overall construction requirements include: the vertical shear strength of the joint area is not less than the vertical component of the tensile yield of the steel support;

[0137] In this embodiment, the detailed construction requirements for the support flange with a broken line transition connection include: the cross-section after turning is at least as strong as the support cross-section, and the stiffening rib of the steel support can bear the component force transmitted from the flange.

[0138] In this example, the detailed construction requirements for the support flange with an arc transition connection and no stiffening include: meeting the mechanical balance condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, and meeting the mechanical balance condition of the transverse bending of the flange in the arc section and the transverse bending moment generated in the middle of the flange needs to be borne by the flange itself.

[0139] In this embodiment, the detailed construction requirements for the support flange with an arc transition connection and stiffening include: meeting the mechanical balance condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, the stiffening rib compartment meeting the moment balance condition and plastic hinge line distribution characteristics of the transverse bending of the flange, and meeting the mechanical balance condition of the transverse tension of the flange in the arc section.

[0140] Example 3: This example is a storage medium on which a computer program executable by a processor is stored. When the computer program is executed, the steps of the construction design method of the enlarged end node of the steel support in Example 1 are implemented.

[0141] Example 4: This example is a construction design device for the enlarged end node of a steel support, which has a memory and a processor. A computer program executable by the processor is stored on the memory. When the computer program is executed, the steps of the construction design method of the enlarged end node of the steel support in Example 1 are implemented.

[0142] In addition, although the present invention has been described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the above-described functions and / or features may be integrated in a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It should also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present invention. Rather, considering the attributes, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the modules will be understood within the ordinary skills of an engineer. Thus, those skilled in the art can implement the present invention as set forth in the claims without undue experimentation. It should also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0143] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above methods in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0144] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a predefined sequence of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0145] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable media can even be paper or other suitable media on which the above programs can be printed, because the above programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, deciphering or otherwise processing as appropriate, and then storing them in a computer memory.

[0146] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0147] In the above description of this specification, the descriptions referring to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0148] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

[0149] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A design method for the enlarged joint structure at the end of a steel support, characterized in that, Including: Obtain the section parameter information of steel columns, steel beams and steel braces at the node, as well as the steel strength information of steel columns, steel beams and steel braces; Obtain the support flange transition connection forms selected by the user at the node, including the support flange with a broken line transition connection and stiffening, the support flange with an arc transition connection and without stiffening, and the support flange with an arc transition connection and with stiffening; Based on the support flange transition connection form, retrieve the overall structural requirements of the enlarged end node of the steel brace and the detailed structural requirements corresponding to this transition connection form; Based on the section parameter information and steel strength information of steel columns, steel beams and steel braces, and combined with the overall structural requirements and detailed structural requirements, generate the structural parameter information of the enlarged end node of the steel brace; The overall structural requirements are used to limit the structural parameters of the enlarged end node domain of the steel brace based on the overall force requirements of the enlarged end node of the steel brace; The detailed structural requirements are used to limit the structural parameters of the detailed structure based on the force requirements of the detailed structure of the enlarged end node of the steel brace. The detailed structure includes the steel brace flange, the web diffusion part, the stiffener and the steel brace flange transition arc part; The overall structural requirements include: the vertical shear strength of the node domain is not less than the vertical component of the tensile yield of the steel brace; The detailed structural requirements for the support flange with a broken line transition connection and with stiffening include: the cross-section after turning is at least as strong as the support cross-section, and the stiffener of the steel brace can bear the component force transmitted from the flange; The detailed structural requirements for the support flange with an arc transition connection and without stiffening include: meeting the mechanical equilibrium condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, and meeting the mechanical equilibrium condition of the transverse bending of the flange in the arc section and the transverse bending moment generated in the middle of the flange needs to be borne by the flange itself; The detailed structural requirements for the support flange with an arc transition connection and with stiffening include: meeting the mechanical equilibrium condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, the stiffener partition meeting the moment equilibrium condition and the plastic hinge line distribution characteristics of the transverse bending of the flange, and meeting the mechanical equilibrium condition of the transverse tension of the flange in the arc section.

2. The design method of the enlarged joint structure at the end of the steel support according to claim 1, characterized in that, The vertical shear strength of the node domain is not less than the vertical component of the tensile yield of the steel brace, including: ； Where h j is the height at which the enlarged support web at the end of the steel support is connected to the steel column, t j is the thickness of the enlarged support web at the end of the steel support, h wb is the web height of the steel beam section, t wb is the web thickness of the steel beam section, A br is the cross-sectional area of the steel support, α is the horizontal angle between the axis of the steel support and the axis of the steel beam, f vy is the shear strength of the steel, f y is the yield strength of the steel.

3. The design method of the steel support end enlarged joint structure according to claim 1, characterized in that The cross-section after turning is at least as strong as the support cross-section, including: ； In the formula, b is the width of the flange of the steel support, h w is the height of the web of the steel support, t f is the thickness of the flange of the steel support, t w is the thickness of the web of the steel support, β is the diffusion angle of the flange of the steel support, f y is the yield strength of the steel.

4. The design method of the steel support end enlarged joint structure according to claim 1, characterized in that The stiffener of the steel brace can bear the component force transmitted from the flange, including: ； In the formula, b is the width of the flange of the steel support, t f is the thickness of the flange of the steel support, β is the diffusion angle of the flange of the steel support, f y is the yield strength of the steel, t s is the thickness of the stiffener of the steel support.

5. The design method of the enlarged joint structure at the end of the steel support according to claim 1, characterized in that, Meeting the mechanical equilibrium condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, including: ； Wherein, R is the radius of the transition arc of the steel support flange, b is the width of the steel support flange, and t f is the thickness of the steel support flange, and t j is the thickness of the enlarged support web at the end of the steel support.

6. The design method of the enlarged joint structure at the end of the steel support according to claim 1, characterized in that Meeting the mechanical equilibrium condition of the transverse bending of the flange in the arc section and the transverse bending moment generated in the middle of the flange needs to be borne by the flange itself, including: ； Wherein, R is the radius of the transition arc of the steel support flange, b is the width of the steel support flange, and t f is the thickness of the steel support flange.

7. The design method of the enlarged joint structure at the end of the steel support according to claim 1, characterized in that The stiffener partition meeting the moment equilibrium condition and the plastic hinge line distribution characteristics of the transverse bending of the flange, including: a) When ； b) When ； Wherein, a is the length of the stiffener partition flange, b is the width of the steel support flange, R is the radius of the transition arc of the steel support flange, and t f is the thickness of the steel support flange.

8. The design method of the enlarged joint structure at the end of the steel support according to claim 1, characterized in that, Meeting the mechanical equilibrium condition of the transverse tension of the flange in the arc section, including: ； Wherein, ts’ is the thickness of the stiffener in the arc section of the supporting flange, a is the length of the stiffener partition, R is the radius of the transition arc of the steel support flange, and t f is the thickness of the steel support flange.

9. A device for the structural design of an enlarged joint at the end of a steel support, characterized in that, Including: An information acquisition module for obtaining the section parameter information of steel columns, steel beams and steel braces at the node, as well as the steel strength information of steel columns, steel beams and steel braces; A connection form determination module for obtaining the support flange transition connection forms selected by the user at the node, including the support flange with a broken line transition connection and with stiffening, the support flange with an arc transition connection and without stiffening, and the support flange with an arc transition connection and with stiffening; A construction requirement retrieval module for retrieving the overall construction requirements of the enlarged end node of the steel support and the detailed construction requirements corresponding to the transition connection form based on the transition connection form of the support flange; A parameter information generation module for generating the structural parameter information of the enlarged end node of the steel support based on the section parameter information and steel strength information of the steel column, steel beam and steel support, in combination with the overall construction requirements and detailed construction requirements; The overall construction requirements are used to define the structural parameters of the steel support end enlarged node domain based on the overall force requirements of the steel support end enlarged node; The detailed construction requirements are used to define the structural parameters of the detailed structure based on the force requirements of the detailed structure of the steel support end enlarged node. The detailed structure includes the steel support flange, the web diffusion part, the stiffener and the steel support flange transition arc part; The overall construction requirements include: the vertical shear strength of the node domain is not less than the vertical component of the tensile yield of the steel support; The detailed construction requirements for the folded transition connection and stiffening of the support flange include: the cross-section after turning is at least as strong as the support cross-section, and the stiffener of the steel support can bear the component force transmitted from the flange; The detailed construction requirements for the arc transition connection and non-stiffening of the support flange include: meeting the mechanical equilibrium condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, and meeting the mechanical equilibrium condition of the transverse bending of the flange in the arc section and the transverse bending moment generated in the middle of the flange needs to be borne by the flange itself; The detailed construction requirements for the arc transition connection and stiffening of the support flange include: meeting the mechanical equilibrium condition of the axial tension of the web in the arc section and the increased web width in the arc section participating in the force, the stiffener partition meeting the moment equilibrium condition and plastic hinge line distribution characteristics of the transverse bending of the flange, and meeting the mechanical equilibrium condition of the transverse tension of the flange in the arc section.

10. A storage medium having stored thereon a computer program executable by a processor, characterized in that: When the computer program is executed, it realizes the steps of the steel support end enlarged node construction design method described in any one of claims 1 to 8.

11. A steel support end enlarged joint structure design device, having a memory and a processor, with a computer program stored on the memory that can be executed by the processor, characterized in that: When the computer program is executed, it realizes the steps of the steel support end enlarged node construction design method described in any one of claims 1 to 8.

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