Supporting structure of portal steel frame building and machining equipment and mounting method of supporting structure

Abstract

The invention belongs to the technical field of door-type steel frame building structures, and particularly relates to a supporting structure of a door-type steel frame building and machining equipment and an installation method of the supporting structure. In the supporting structure, the included angle between the angle brace and the steel frame is larger than or equal to 45 degrees, the included angle between the angle brace and the purline is smaller than or equal to 45 degrees, the fixing point is located above the centroid line of the purline, and the installation angle marking line with the 45-degree included angle and the fixing point marking direction above the centroid line are arranged in the installation area of the purline. The machining equipment body is provided with a limiting stop block, a feeding port, a 45-degree spraying groove and an arrow groove with an upward arrow, and the machining equipment body is used for spraying marks. The installation method comprises the steps of purline marking, steel frame and purline erecting and angle brace erecting according to the mark. Through sign guidance, it is ensured that installation meets the standard, quality inspection is facilitated, the section of a component is not weakened, structural safety storage and safety are improved, and the problems that an existing angle brace connection angle is not consistent, the position of a fixing point is improper, and installation quality is difficult to guarantee are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of portal steel frame building structures, and in particular relates to a supporting structure of a portal steel frame building, processing equipment and an installation method thereof. Background Art

[0002] As a type of planar force-bearing structural system, the portal frame structure is composed of steel columns and steel beams connected by rigid connections. The column base and the foundation are usually hinged. The roof horizontal support and the column inter-support are arranged perpendicular to the frame to form a spatially stable system. Cross supports are often used because of their reasonable and economical force. When they cannot be used, portal supports are selected. They are suitable for large-span single-story industrial and civil buildings. They have the advantages of light weight and high strength, good seismic resistance, high degree of industrialization, efficient installation, beautiful appearance, spacious interior space and cost-effectiveness.

[0003] Research shows that the failure of portal frames is mostly caused by the buckling of the flange under maximum compression. The connection between the lower flange of the inclined beam and the inner flange of the frame column is the key buckling point, so it is crucial to set a corner brace here. If it is not possible to set it, the structural safety must be ensured by increasing the cross-section of the component or setting rigid braces.

[0004] However, in actual projects, many portal frame factories have problems with the corner bracing, purlin and frame connections not meeting the specifications, such as bolt connections being changed to welding, connection angles not meeting the standards, and bolt positions not being above the centroid. This is due to rushing the site to skip drilling and directly welding, as well as construction workers not installing according to specifications or lacking correct operational knowledge. In addition, the floor height at the connection point between the roof steel beam and the corner brace is usually over 6 meters, making it difficult to detect details and measure angles on the ground after installation, posing a hidden danger to building safety. The consequence of such non-specification construction is that the flanges connected to the frame beam columns and corner braces will buckle and fail before the design load is reached, reducing the structural safety reserve and endangering the safety of the building structure.

[0005] Therefore, there is an urgent need for a supporting structure of a portal steel frame building and its processing equipment and installation method to solve the above problems. Summary of the Invention

[0006] The present invention aims to provide a support structure for a portal steel frame building, as well as its processing equipment and installation method. This approach addresses existing issues such as the angles at which corner braces connect to the frame and purlins, the location of corner brace fixing points not meeting regulatory requirements, and difficulties ensuring construction and installation quality. The aim is to ensure reasonable force distribution between the corner braces, the frame, and the purlins, facilitating construction, installation, and quality inspection.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A support structure for a portal steel frame building comprises a steel frame and purlins. The steel frame is provided with purlin supports, which secure the purlins to the steel frame via the purlin supports. A corner brace is also provided, with one end of the corner brace secured to the steel frame and the other end secured to the purlin. The angle between the corner brace and the steel frame is greater than or equal to 45 degrees, and the angle between the corner brace and the purlin is less than or equal to 45 degrees. By limiting the angles between the corner brace, the steel frame, and the purlins, the connection is ensured to be properly stressed and in compliance with regulatory requirements, effectively avoiding flange buckling failures caused by angles that do not meet requirements.

[0009] Furthermore, the fixing points of the corner braces and purlins are located above the centroid of the purlins, ensuring that the support points on the corner braces are not lower than the centroid of the purlins, meeting relevant regulatory requirements and further ensuring the reliability of the connection and the safety of the structure.

[0010] Furthermore, the purlin installation area is equipped with a corner brace installation angle marking line, which forms a 45-degree angle with the purlin's centroid. By setting the angle marking line on the purlin, construction workers are provided with clear installation guidance, facilitating accurate control of the angle between the corner brace and the steel frame and purlin during installation, thus avoiding problems caused by angle deviation.

[0011] Furthermore, the purlin installation area is equipped with a corner brace fixing point marking direction, which is set above the purlin's centroid. The clear fixing point marking direction helps construction personnel quickly and accurately determine the fixing position of the corner brace and purlin, ensuring that the fixing point is located above the purlin's centroid, thereby improving installation quality.

[0012] A processing device for the support structure of a portal steel frame building comprises a processing device body, sized to match the purlin installation area, with a purlin end stopper at one end and a purlin feed port at the other. The processing device body is provided with a spraying slot at a 45-degree angle to the bottom edge. The processing device body also has an arrowhead slot, with its bottom point positioned above the centroid of the purlin, and the arrowhead pointing upward. The processing device can conveniently spray-paint the purlins with required angle markings and fixed point orientations, facilitating subsequent installation and improving processing efficiency and quality.

[0013] A method for installing a supporting structure of a portal steel frame building includes the following installation steps:

[0014] a. Marking of purlins: put the purlins into the feeding port of the purlin processing equipment until the purlins are placed on the purlin end limit block at one end of the purlin processing equipment. Mark the positions of the spraying slots and arrow slots on the purlin processing equipment by spraying the purlins to make purlins with the marking lines of the corner brace installation angle and the marking direction of the corner brace fixing point for use; mark the purlins with the processing equipment to ensure that there are clear installation guidance marks on the purlins.

[0015] b. Set up the portal steel frame, and install the purlin support plate on the steel frame, and fix the purlins to the purlin support plate; complete the basic setting up of the portal steel frame and the preliminary installation of the purlins.

[0016] c. Install the corner brace, securing the lower end of the corner brace to the steel frame and the upper end to the purlin. Based on the corner brace installation angle markings on the purlin, set the angle between the corner brace and the steel frame to be greater than or equal to 45 degrees, and the angle between the corner brace and the purlin to be less than or equal to 45 degrees. At the same time, based on the direction of the corner brace fixing point markings on the purlin, set the fixing point of the corner brace to the purlin above the centroid of the purlin. Accurately install the corner brace according to the markings on the purlin, ensuring that the connection angle and fixing point positions meet the requirements and that the structure is properly stressed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By using marking lines to precisely control the angle between the corner brace and the steel frame to be ≥45 degrees and the angle between the corner brace and the purlin to be ≤45 degrees, and the fixing point to be located above the centroid of the purlin, the design avoids the risk of flange buckling caused by angle deviation and improper position of the fixing point in traditional installation, strengthens the anti-buckling capacity of the connection between the lower flange of the inclined beam and the inner flange of the rigid frame column, and directly improves the load-bearing stability of the building structure.

[0019] The non-contact sign guidance avoids physical weakening of the cross-section of the steel components, maintains the original mechanical properties of the components, and combined with precise installation positioning, enables the portal steel frame to more fully exert its structural bearing capacity when bearing the design load, and improves the structural safety reserve to the ideal state required by the regulations, significantly reducing safety hazards during the use of the building.

[0020] Visual marking lines provide an intuitive basis for quality inspection of building structures. Whether in the construction phase or later maintenance, the marking lines can be used to quickly verify the installation accuracy of corner braces, solving the problem of difficult detection of traditional high-space support structures in buildings, ensuring that the safety of the building structure throughout its life cycle is assessable and traceable.

[0021] The support structure design and processing and installation method does not change the original structural system of the portal steel frame. It achieves seamless integration with the metal frame structure through non-destructive optimization means. It is suitable for upgrading the support system of large-span industrial and civil buildings. Without affecting the building's use function, it enhances the building's comprehensive performance such as wind resistance and earthquake resistance from the structural essence. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the installation structure of the corner brace connection of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the purlin processing equipment body of the present invention.

[0024] In the figure: 1. Steel frame; 2. Purlin; 3. Purlin support plate; 4. Corner brace; 5. Centroid; 6. Processing equipment body; 7. Arrow slot; 8. Spray tank; 9. Feed port. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1-2 A supporting structure of a portal steel frame 1 building comprises a steel frame 1 and a purlin 2. A purlin support plate 3 is provided on the steel frame 1. The purlin 2 is fixed to the steel frame 1 through the purlin support plate 3. A corner brace 4 is also provided. One end of the corner brace 4 is fixed to the steel frame 1, and the other end is fixed to the purlin 2. The angle between the corner brace 4 and the steel frame 1 is greater than or equal to 45 degrees, and the angle between the corner brace 4 and the purlin 2 is less than or equal to 45 degrees. By limiting the angle between the corner brace 4 and the steel frame 1 and the purlin 2, the connection force is guaranteed to be reasonable and in compliance with the specification requirements, which can effectively avoid the flange buckling damage problem caused by the angle not meeting the requirements.

[0028] The fixing point of the corner brace 4 and the purlin 2 is set above the centroid 5 of the purlin 2, ensuring that the position of the support point on the corner brace 4 is not lower than the centroid 5 of the purlin 2, meeting the requirements of relevant specifications and further ensuring the reliability of the connection and the safety of the structure.

[0029] The installation area of ​​the purlin 2 is provided with an installation angle marking line for the corner brace 4. The marking line forms a 45-degree angle with the centroid line 5 of the purlin 2. By setting the angle marking line on the purlin 2, a clear installation guide is provided for the construction personnel, which facilitates accurate control of the angle between the corner brace 4 and the steel frame 1 and the purlin 2 during the installation process, avoiding problems caused by angle deviation.

[0030] The installation area of ​​the purlin 2 is provided with a marking direction of the fixing point of the corner brace 4, and the marking direction of the fixing point is set above the centroid line 5 of the purlin 2. The clear marking direction of the fixing point can help construction personnel quickly and accurately determine the fixing position of the corner brace 4 and the purlin 2, ensure that the fixing point is located above the centroid line 5 of the purlin 2, and improve the installation quality.

[0031] A processing device for the support structure of a portal steel frame 1 building has a processing device body 6, the processing device body 6 has a size matching the installation area of ​​the purlin 2, a purlin 2 end limit block is provided at one end, and a purlin 2 feed port 9 is provided at the other end. A spraying groove 8 is provided on the processing device body 6, and the spraying groove 8 forms a 45-degree angle with the bottom edge. The processing device body 6 also has an arrow groove 7, the bottom point of the arrow groove 7 is provided above the position of the centroid 5 of the purlin 2, and the arrow of the arrow groove 7 faces upward. The processing equipment can conveniently spray the purlin 2 with the required angle marking lines and fixed point marking directions, which provides convenience for subsequent installation work and improves processing efficiency and quality.

[0032] A method for installing a supporting structure of a portal steel frame building comprises the following steps:

[0033] a. Marking of purlin 2: Place purlin 2 into the feed port 9 of the purlin 2 processing equipment until it reaches the end limit block of purlin 2 at one end of the purlin 2 processing equipment. Mark the positions of the spraying slot 8 and arrow slot 7 on the purlin 2 processing equipment by spraying the purlin 2. Make purlin 2 with marking lines of the installation angle of the corner brace 4 and the marking direction of the fixing point of the corner brace 4 for use. Mark the purlin 2 by spraying the processing equipment to ensure that there are clear installation guide marks on the purlin 2.

[0034] b. Set up the portal steel frame 1, and set up the purlin support plate 3 on the steel frame 1, and fix the purlin 2 to the purlin support plate 3; complete the basic setting up of the portal steel frame 1 and the preliminary installation of the purlin 2.

[0035] c. Install the corner brace 4, securing its lower end to the steel frame 1 and its upper end to the purlin 2. Based on the corner brace 4 installation angle markings on the purlin 2, set the angle between the corner brace 4 and the steel frame 1 to be greater than or equal to 45 degrees, and the angle between the corner brace 4 and the purlin 2 to be less than or equal to 45 degrees. At the same time, based on the direction of the corner brace 4 fixing point markings on the purlin 2, set the fixing point of the corner brace 4 to the purlin 2 above the centroid 5 of the purlin 2. Accurately install the corner brace 4 according to the markings on the purlin 2, ensuring that the connection angle and fixing point positions meet the requirements and that the structure is properly stressed.

[0036] During the installation process, construction personnel can quickly adjust the installation angle and position of the corner brace 4 by observing the relative position of the corner brace 4 and the marking line to ensure that it meets the requirements of the specifications. After the installation is completed, inspectors can conveniently check the installation quality by observing the marking lines and arrow marks on the ground, and promptly discover and adjust possible errors.

[0037] In summary, the supporting structure of a portal steel frame 1 building and its processing equipment and installation method of the present invention provide an innovative solution with broad market application prospects.

[0038] It should be noted that the parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology.

[0039] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "set," and "provided with" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may modify or make equivalent substitutions to the present invention without departing from the spirit and scope of the technical solution of the present invention. Such modified or equivalent substitutions shall be within the scope of the technical solution for which protection is sought, provided that they do not depart from the core design principles and functional characteristics of the present invention.

Claims

1. A supporting structure for a portal steel frame building, characterized by: The utility model has a steel frame and purlins, wherein a purlin supporting plate is provided on the steel frame, and the purlins are fixed to the steel frame through the purlin supporting plate. A corner brace is also provided, one end of the corner brace is fixed to the steel frame, and the other end is fixed to the purlin. The angle between the corner brace and the steel frame is greater than or equal to 45 degrees, and the angle between the corner brace and the purlin is less than or equal to 45 degrees.

2. The supporting structure of the portal steel frame building according to claim 1, characterized in that: The fixing point where the corner brace is fixed to the purlin is arranged above the centroid line of the purlin.

3. The supporting structure of the portal steel frame building according to claim 1, characterized in that: The installation area of ​​the purlin is provided with a corner brace installation angle marking line, which forms a 45-degree angle with the centroid line of the purlin.

4. The supporting structure of a portal steel frame building according to claim 1, characterized in that: The installation area of ​​the purlin is provided with a corner bracing fixing point marking direction, and the fixing point marking direction is arranged above the centroid line of the purlin.

5. A processing device for a supporting structure of a portal steel frame building, comprising a processing device body, characterized in that: The processing equipment body has a size that matches the purlin installation area. A purlin end limit block is provided at one end, and a purlin feed port is provided at the other end. A spray groove is provided on the processing equipment body. The spray groove is at a 45-degree angle to the bottom edge. The processing equipment body also has an arrow groove. The bottom point of the arrow groove is set above the centroid position of the purlin, and the arrow of the arrow groove is facing upward.

6. A method for installing a supporting structure of a portal steel frame building, characterized in that: The installation steps are as follows: a. Marking the purlins: Place the purlins into the feed port of the purlin processing equipment until they are placed at the purlin end limit block at one end of the purlin processing equipment. Mark the purlins with the spraying slots and arrow slots on the purlin processing equipment. Make the purlins with the corner brace installation angle marking lines and the corner brace fixing point marking direction for use; b. Set up the portal steel frame, install the purlin support plate on the steel frame, and fix the purlins to the purlin support plate; c. Install the corner brace, fix the lower end of the corner brace to the steel frame, fix the upper end of the corner brace to the purlin, and set the angle between the corner brace and the steel frame to be greater than or equal to 45 degrees, and the angle between the corner brace and the purlin to be less than or equal to 45 degrees according to the corner brace installation angle mark line on the purlin. At the same time, according to the direction of the corner brace fixing point mark on the purlin, set the fixing point of the corner brace and the purlin above the centroid line of the purlin.

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